HomeMy WebLinkAbout4. Prior Lake Spring Lake District EAW
#-4
CITY OF SHAKOPEE CONSENT
Memorandum
TO: Mayor & City Council
Mark McNeill, City Administrator
FROM: Bruce Loney, Public Works Director
SUBJECT: Environmental Assessment Worksheet for the
Prior Lake Outlet and Channel Improvement Project
DATE: August 31, 2004
INTRODUCTION:
The purpose of this agenda item is to approve the list of comments that have been
generated by City staff, consultants and the Environmental. Advisory Committee on
behalf of the City of Shakopee on the Prior Lake - Spring Lake Watershed District
(pLSL WD) Environmental Assessment Worksheet (EA W) for the Prior Lake Outlet and
Channel Improvement Project.
BACKGROUND:
PLSL WD has prepared an EA W for the restoration and improvement of the Prior Lake
Outlet and Channel Improvement, which goes from Prior Lake to Blue Lake in Scott
County. Attached to this memorandum is a copy of the EA W along with a letter from
Shannon Lotthammer, District Administrator, on the proposed improvements and the
EA W timeline. Comments will need to be submitted to the PLSLWD by 4:00 P.M. on
September 1, 2004.
Also attached is a letter that has been drafted by staff from comments that have been
received from the Environmental Advisory Committee, City staff and consultants. Also
enclosed are e-mails received from Environmental Advisory Committee members
commenting on this EA W. Staff is requesting that Council review these comments and
provide any additional comments, if any, and authorize staff to send these comments to
the PLSLWD on their EAW.
ALTERNATIVES:
1. Approve a motion approving the comments, as submitted by staff.
2. Approve a motion submitting comments, as submitted by staff and modified by
City Council.
3. Table for additional information.
RECOMMENDATION:
Staff recommends either Alternative No. 1 or No.2, to submit comments on the
PLSL WD outlet channel EA W before the September 1, 2004 deadline.
ACTION REQUESTED:
Approve a motion authorizing staff to submit comments to the PLSL WD on the (EA W)
for the Prior Lake Outlet and Channel Improvement Project on behalf of the City of
Shakopee.
~.
Bruce Lone
PublicW ork
BUpmp
ENGRlEMPWYEEFOLDERlPPENNINGTON/COUNClUEA W
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',PR,IOR lAKE'-SPRING' LAKE~ATERSHED,D1STRI~t""
PhoneJ902) 447-4,166
,'Fax (952), 447-4:167
www.plslwd.org
Memoranduin
July 27, 2004, '
..
To~ Distribution List
From: Shannon Lotthanul1er,'Adminisirator5~d- " ' , , ,
" "
.. ,
Re:' 'Elrvir(mmentalAssessmentWo~ksheet for the Prior Lake Outlet atldCharmel
, ")ll1provementProjept " ,'" " . ",
, , ' ,
, , ',.", , .
" Ehe10sedis the Environmental Assessment Worksheet (EA W)' for therestoratibn:and,' '",'
, ,'. iIp'provetnentofthe Prior Lake outlet and 'channel (1()catedinScott Courity, Minnesota) t.o'. '
stabilize:chailllelbanks,' improve, efficiency, plan for f\tturec.onditions and. improvel:lesthetics ."
,a'lldwildlife h~l1?itat.. ,This EA WWillbenoticed iIi th~ August.~2nd is~tie of the EQB Monitor, and
. , comments will be accepted by the PtiorLake-SpringLake Watershed.District(PLSLWD) until
4:00p.l11. on Septelllberl,2004. In addition, fhePrior'Lake-SpringLakeWatershed District
. (PLSL WD)Board of Managers will ho~d a public heating onthis EA WattherrAugust 10,2004
regular Board meeting at 7 :00 p.m. at the Prior take State Bank CoIIlmunity Room, 16677
DuluthAve.,Prior'Lake, Minriesota.' "
, ' . ' ,
If you have any questions about this proposed project, please contact me at 952-447-4166 or'.
slotthammet@pIslwd.org. Thank you.
15815 FRANKLIN TRAIL S.E., SUITE 100 " PRIOR LAKE, MN 55372
Memorandum
To: Shannon Lotthammer, PLSL WD
From: Bruce Loney, P.E., City of Shakopee
Date: August 24, 2004
Re: Prior Lake Spring Lake Watershed District (PLSL WD) EA W Comments for
the Prior Lake Outlet and Channel Improvement Project
The City of Shakopee has reviewed the EA W for the Prior Lake Outlet and Channel
Improvement Project. The comments provided have been generated by the City Staff,
Consultants, and the Environmental Advisory Committee. From this review, the City offers
the following comments:
. The EA W acknowledges that changes to the existing management plan will need to be
made once the EA W process is complete. These changes to the management plan
include allowing water to outlet between 902.0 and 902.5 in the fall, if needed, and
increasing the maximum discharge rate during the spring and/or fall from 20 cfs to 30
cfs. The design of the new outlet structure will also eliminate the need for PLSL WD
Staff to open the outlet to discharge water. Overall, this concept plan outlined in the
EA W appears to address capacity of the channel and outlet as well as addressing erosion
issues in the near future and for the long-term.
. The EA W indicates that in some segments of the channel, the proj ect will require tree
removal. How much of this tree removal will be in the City of Shakopee and what types
of trees will be affected? Tree removal associated with the project would have to meet
the City's woodland management ordinance, Section 11.60, Subdivision 9 ofthe
Shakopee City Code.
. What, if any, is the involvement of the Lower Minnesota River Watershed District with
this project? Has the PLSLWD requested funding assistance from the Lower Minnesota
River Watershed District? They may be an additional source of funding for the project.
. The EA W states the PLSL WD encourages water quality monitoring on Deans Lake. As
part ofthe implementation ofthis, the City is requesting that the PLSL WD and/or the
LMRWD assist in funding a portion of this study. It is understood that this could be
addressed after completion of the EA W process.
. Shakopee's latest Draft Comprehensive Plan contains a section on Natural Resources.
This section identifies areas as future greenway corridors. The Prior Lake channel /
corridor is a top priority in the City's goals of preserving greenways. This map should be
consulted when updating, changing, acquiring easements, or beginning work on a
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August 24, 2004
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particular segment so work can be done collaboratively to obtain wider widths where
desired.
. The strategies identified for managing future runoff volumes (Item #6) concerning Rules
and Land Management have been developed and implemented by the PLSL WD to
reduce negative storm water impacts associated with future development. It was
reported that these and other measures go beyond current NPDES requirements. It
would be advantageous for the updated Joint Powers Agreement to require these
standards for all development utilizing the channel for conveyance of storm water.
. Exhibit #1 shows the water flow through Dean Lake. However, the report does not
mention the bypass to the east of Dean's Lake. The modifications to the Output
Operating Plan could affect how this bypass is operated, even if as discussed in the
EA W, no upgrades to the bypass itself are anticipated. Some discussion, or input from
Shakopee or the LMR WD would be important to determine the impact on the operation
of the bypass channel.
. Uncertainties were expressed in three areas: a) impact on wetlands, particularly around
Dean Lake b) impacts of future County Road 21 and, c) specific impacts of development
of lands outside the PLSL WD's jurisdiction, but directly tributary to the channel,
including Mdewakanton lands. (The EA W completed in March of 2002 by Shakopee
studying these lands is for a project that has undergone significant change and is being
updated and restudied now). The urgency ofthis project coupled with the lack of data
for some areas could be balanced by implementing a standard for all development using
the channel, as mentioned above.
. There is a feasibility study on file at the County which lays out plans for widening
County Road 16. This would have and impact on the plans for segments 4 and 5.
. More detail than is given might be available for segments #5 and #6. Segment #5 is
already under development pressure and various plans have been discussed in
conjunction with plats brought forth. Segment #6 is the area where a new outlet
conveyance has already been planned and approved by the City of Shakopee. This
comment is provided here for informational purposes for the PLSL WD.
The City appreciates the opportunity to comment on the EA W and looks forward to working
with the PLSLWD as this project moves forward.
C:\Documents and SettingslBLoneylLocal Settings I Temporary Internet Files IOLK4D3 \082404bl, doc
Bruce Loney
From: Kathy Gerlach [k_gerl@hotmail.com]
Sent: Monday, August 23, 2004 3:29 PM
To: MThemig@cLshakopee.mn.us
Cc: smenden@wenck.com; heidL f. benedict@xcelenergy.com; ckubler@wenck.com;
BLoney@cLshakopee.mn.us; Kate.lease@netzero.net
Subject: Comments PL Channel and Outlet
DRAFT Comments on the EAW for the PLSLWD Prior Lake Outlet and Channel
August 20, 2004
The EAC (Environmental Advisory Committee) spent a good share of its August
11, 2004 meeting listening to a thorough presentation of the Environmental
Assessment Worksheet for the proposed upgrades to the Prior lake channel and
outlet. Ms Sharon Lotthammer, PLSLWD Administrator, gave an excellent
report and answered most of EAC member questions
The following comments are offered to the proposer/RGU for further study or
clarification:
1. Tree clearing and controlled burns were both mentioned (SECTION 10 COVER
TYPES, SECTION 6 DESCRIPTION) as means for improving the channel ROW.
Shakopee's Woodland Management Ordinance would need to be consulted, as
well as any ordinances related to controlled burns.
2. Shakopee's latest Draft Comprehensive Plan contains a section on Natural
Resources. This section clearly lays out the areas identified as future
greenway corridors. The Prior Lake channel corridor is a top priority in the
Ci ty' s goals of preserving greenways. This map should be, consulted when
updating, changing (SECTION 9, LAND USE), aquiring easements, or beginning
work on a particular segment so work can be done collaborately to obtain
wider widths where desired.
3. Exhibit #1 shows all water flow through Dean Lake, and nowhere in the
report is any mention made of the bypass to the east of Dean's Lake. The
modifications to the Output Operating Plan could affect how this bypass is
operated and functions, even if, as discussed, the EAW calls for no upgrades
to the bypass itself. Some discussion, or input from Shakopee or the LMRWD
would be important.
4. More detail than is given might be available for segments #5 and #6
(SECTION 12 PHYSYCAL IMPACTS ON WATER RESOURCES). Segment #5 is already
under development pressure and various plans have been discussed (?) in
conjunction with plats brought forth. Segment #6 is the area where a new
outlet conveyance has already been planned and approved by the City of
Shakopee. Any reports available should be referenced.
5. (SECTION 29 CUMMULATIVE IMPACTS). Exhibit #8 and Table #8 address
cummulative impacts from the PLSLWD using the Comp Plans from Savage, Prior
Lake and Scott County. Strategies (nos.2 & 3 SECTION #6 DESCRIPTION)
concerning RULES and LAND MANAGEMENT have been developed and implemented by
the PLSLWD to reduce negetive impacts. It was reported that these and other
measures go beyond current NPDES requirements.
It would be advantageous for the updated Joint Powers Agreement to require
these standards for all developement utilizing the channel for conveyance
of stormwater.
6. Uncertainties were expressed in three areas: a) impact on wetlands,
particularly around Dean Lake b) impacts of future County Road 21 and, c)
specific impacts of development of lands outside the PLSLWD's jurisdiction,
but directly tributary to the channel, including Mdewakanton lands (The EAW
completed in March of 2002 by Shakopee studying these lands is for a project
1
that has undergone significant change and is being updated and restudied
now)
The urgency of this project coupled with the lack of data for some areas
could be balanced by implementing a standard for all developement using the
channel, as mentioned above.
7. The need for more involvement by the LMRWD, including perhaps finacial
involvement, was commented on at the EAC meeting
8. There is also a feasibility study on file at the County which lays out
plans for widening County Road 16. This would have and impact on the plans
for segments 4 and 5.
Thankyou for the opportunity to comment.
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2
Bruce Loney
From: Mark Themig
Sent: Thursday, August 19, 2004 5:49 PM
To: Bruce Loney
Subject: FW: EAW Comments - Restoration of PL outlet and Channel
For including in your letter.
-----Original Message-----
From: Benedict" Heidi F [mailto:heidi.f.benedict@xcelenergy.com]
Sent: Thursday, August 19, 2004 3:17 PM
To: Themig, Mark
Subject: EAW Comments - Restoration of PL outlet and Channel
These are the comments/questions I have in relation to the above EAW:
1. It indicates that in some segments of the channel, that it will require tree removal
and selected branch removal to allow sufficient light penetration during the channel
restoration/enhancement. How much of this tree removal will be in the City of Shakopee
and what types of trees will be affected? Request that the Woodland Management Ordinance
of the City of Shakopee be followed.
2. Request assistance from the MN River Watershed District for funding of this project.
3. Request that the PLSLWD be required to contribute to a water quality study of Dean
Lake.
Thanks,
Heidi
Heidi F. Benedict
Xcel Energy - Riverside Plant
3100 Marshall Avenue NE
Minneapolis, MN 55418
612-520-68,05
Fax: 612-573-9163
http://www.xcelenergy.com
1
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I Environmental Assessment Worksheet
I for the
I Pri,or Lake Outlet and Channel
I Improvement Project
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I Prepared by:
I Prior Lake-Spring Lake Watershed District
I July 2004
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~. Prior Lake-Spring Lake ,-4~(~tl{~tr.~ W I
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,I r. Watershed District ---'-~"''''<illi,,&1tii!l;
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I
I Revised 2/99
I ENVIRONMENTAL ASSESSMENT WORKSHEET
Note to preparers: This form is available at www.mnplan.state.mn.us. EA W Guidelines will be available in
I Spring 1999 at the web site. The Environmental Assessment Worksheet provides information about a project that may
have the potential for significant environmental effects. The EA W is prepared by the Responsible Governmental Unit or
its agents to determine whether an Environmental Impact Statement should be prepared. The project proposer must
supply any reasonably accessible data for - but should not complete - the fmal worksheet. If a complete answer does
I not fit in the space allotted, attach additional sheets as necessary. The complete question as well as the answer must be
included if the EA W is prepared electronically.
Note to reviewers: Comments must be submitted to the RGU during the 30-day comment period following notice of
I the EA W in the EQB Monitor. Comments should address the accuracy and completeness of information, potential
impacts that warrant further investigation and the need for an EIS.
1. Project title Prior Lake Outlet and Channel Improvement Project
I 2. Proposer 3. RGU
Contact person Shannon Lotthammer Contact person Shannon Lotthammer
I Title Administrator Title Administrator
Address 15815 Franklin Trail SE, Suite 100 Address 15815 Franklin Trail SE
City, state, ZIP Prior Lake, MN 55372 City, state, ZIP Prior Lake, MN 55372
I Phone 952-447-4166 Phone 952-447-:4166
Fax 952-447-4167 Fax 952-447-4167
E-mail slotthammer@plslwd.org E-mail slotthammer@plslwd.org
I 4. Reason for EA W preparation (check one)
EIS scoping Mandatory EA W Citizen petition RGU discretion Proposer volunteered
I IfEA W or EIS is mandatory give EQB rule category subpart number and subpart name
5. Project location County Scott City/Township Prior Lake, Shakopee
I Section multiple (portions of35.27.23.13.15.14.10,3) Township 115N Range 22W
'I Attach each of the following to theEA W:
. County map showing the general location ofthe project; (Exhibit 1)
. U.S. Geological Survey 7.5 minute, I :24,000 scale map indicating project boundaries (photocopy
I acceptable); (Exhibit 2)
. Site plan showing all significant project and natural features. (Exhibit 3)
I 6. Description
a. Provide a project summary of 50 words or less to be published in the EQB Monitor.
I Restoration and improvement of the Prior Lake outlet and channel to stabilize channel banks,
improve efficiency, plan for future conditions and improve aesthetics and wildlife habitat.
I b. Give a complete description of the proposed project and related new construction. Attach additional
sheets as necessary. Emphasize construction, operation methods and features that will cause physical
manipulation ofthe environment or will produce wastes. Include modifications to existing equipment or
industrial processes and significant demolition, removal or remodeling of existing structures. Indicate the
- timing and duration of construction activities.
m 1
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The Prior Lake outlet and channel were constructed in the early 1980's to address high lake levels on I
Prior Lake, which does not have a natural outlet. The channel, much of which originally existed as a I
natural drainage way of intermittent streams and wetlands, was connected and improved in 1981-
1983 to provide a conveyance route for water from the Prior Lake outlet, which was completed in
1983.
Since the outlet project was completed, the Prior Lake-Spring Lake Watershed District (PLSL WD) I
has operated the outlet and completed repairs along the channel as needed under the framework of an
Outlet Control Structure Management Policy and Operating Procedures approved by the DNR I
(Outlet Operating Plan, Exhibit 4) and a Joint Powers Agreement between the PLSL WD and the
Cities of Prior Lake and Shakopee. While the channel and outlet have worked well over the past 20
years, the channel could be modified in several places to operate more efficiently and in ways that I
take care of erosion problems and enhance the environment. Likewise, the outlet box has developed
some cracks and could be modified to be more efficient and to decrease the amount of staff time
needed for operation and maintenance. In addition, downstream properties tributary to the channel I
have begun to be developed, and development has also increased upstream of Prior Lake. This
additional development, which is allowable under the approved Comprehensive Plans for Scott
County and the cities of Prior Lake and Shakopee, will result in greater volumes of runoff water I
reaching Prior Lake and an increased frequency and intensity of flooding around the lake if nothing
else is done to manage these future volumes. In addition, the development of areas directly tributary
to the outlet channel has the potential to increase runoff volumes regularly carried by the channel I
following storm events, even when the Prior Lake outlet is not open.
The PLSLWD recognized these increased pressures on the operation ofthe outlet and channel, the I
need to plan for future development of the watershed (including areas directly tributary to the
channel), and the need for additional work on the outlet and channel to ensure the system continues
to operate effectively. In the year 2000 the PLSLWD initiated a feasibility analysis for
enhancements to the outlet and channel. This culminated in the completion of the Prior Lake Outlet I
Channel and Lake Volume Management Study in May 2003, which identified five strategies for
managing runoff volumes and lake levels into the future, including improvements to the outlet box to
increase efficiency and reduce maintenance needs, and a Conceptual Plan for restoring and I
enhancing the outlet channel. The outlet box improvements and channel restoration/enhancement
are the subject of this EAW. The other three strategies are either already being implemented
separately or are under consideration for future implementation. I
To implement the two construction-related strategies from the volume management study (i.e. the
outlet box improvements and channel restoration/enhancement) the PLSLWD and the Cities of Prior I
Lake and Shakopee are undertaking an estimated $3.5 million project over the next 5 to 7 years to
restore and enhance the outlet channel and improve the efficiency of the outlet box. Details on the
proposed outlet channel and outlet box modifications are provided in the following paragraphs. I
Channel Restoration/Enhancement: The Outlet and Channel Improvement Project is based on an
overall concept for restoring and improving the outlet channel that relies on a combination of
"traditional" engineering techniques such as the use of rock and boulders to provide stability and I
resist bank sloughing, and bioengineering or "natural" vegetation techniques to provide upland soil
stability. The project will involve acquiring additional easements along the channel, designing the
improvements for each specific segment, and constructing the improvements. I
Exhibit 5 presents the Conceptual Plan for the channel. The approach involves enhancing the natural
features of the existing channel to the greatest extent possible while ensuring the channel stays I
within the District's easements. Construction will involve re-shaping the side slopes of some
2 I
m
m ,sections of the channel to address existing erosion issues and enhance capacity. Rock and boulder
stabilization will be used along selected segments of the lower section of the channel to provide
m stability along steep banks. Live stakes, generally consisting of willow posts, will often be driven
into the water line (water level of2-year stonnevent when outlet is open) to provide added structural
integrity. Above the rocked channel bioengineering techniques will be used to provide upland soil
m stability. In some segments of channel this will require tree removal and selected branch removal to
allow sufficient light penetration.
Long-term maintenance will involve maintaining the vegetation established during the project.
m Some controlled burns will be necessary to allow native species to gain a foothold where aggressive
non-native species are the primary vegetative cover. Overall, the proposed project will address the
channel restoration and enhancement needs while improving habitat quality through the use of native
m plant technologies and providing the opportunity for a greenway.
Final design and construction of segments 1 through 3, 7 and 8 of the channel is anticipated to occur
m over the next 3 to 5 years, as funding is available. Full construction of segments 4 through 6 of the
channel may take a bit longer due to the need to work out drainage plans for land tributary to those
channel segments (note that an EA W completed in March 2002 by the City of Shakopee addresses
m flow to segments 4 through 6 of the channel from property within the City of Shakopee). However,
the project partners may complete restoration and enhancement efforts sooner along high-priority
stretches of segments 4 through 6 that will have a positiveimpacton downstream water quality or
m overall channel stability. For example, the PLSLWD hasreceiv~d a grantforrestoringa,nd
enhancing 970' of channel in segment 4 that is being impacted by cattle. That project is scheduled
for construction during the winter of 2004-2005. .
m The project partners anticipate constructing all or part of a segment each year during the winter
months to time the construction with low water levels, minimize any potential downstream impacts,
and allow forspring planting and seeding ofthe channel banks.
m Outlet Box Improvements: The outlet box improvements will involve replacing the current outlet
structure with a new design that operates more efficiently(Le. moves water off the lake faster) and
E requires less maintenance during operation (see Exhibit6,conceptual outlet plans). The new outlet
will maintain the same sill elevation (902.5'), but will operate more efficiently at lower lake levels.
Instead of the outlet box limiting the flow through the system, the pipe under County Road 21 would
E become the constraining factor at lower lake elevations. The current outlet allows the pipe to reach
full capacity ata lake elevation of 903.2' . The proposedriew outlet would allow the pipe to reach
full capacity at a lake elevation of902.5'. This improved outlet efficiency would decrease the
m amount oftime the level of Prior Lake would be above the ordinary high water level (OHW) of
904.0' and the corresponding flooding, water quality and recreational impacts, without altering the
maximum discharge rate, the total volume discharged from Prior Lake or the level at which the outlet
would begin discharging water.
m The current outlet requires that slide gates be manually removed to open the outlet below a lake
elevation of 903.0'. The proposed new outlet would consist of a fix-crested weir set at elevation
E 902.5'. When the water level ofthe lake rose above that elevation, water would spill over the weir
and into the outlet pipe. This design therefore eliminates the need for PLSLWD staff to open the
outlet to discharge water.
E The outlet box would be equipped with a slide-gate to allow for seasonal (currently early spring)
outletting of water between elevations 902.0' and 902.5' as allowed for in the Outlet Control
m Structure Operating Plan approved by the Department of Natural Resources. Efforts wiII also be
made to improve the aesthetics of the outlet during reconstruction through the use of imprinted and
m ...
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tinted concrete designed to look like natural rock or boulders. The outlet structure would also be I
equipped with a shut-off gate in case it was necessary to close the outlet completely to make repairs,
and would be equipped with a debris baffle to minimize maintenance needs. I
Outlet box construction would most likely occur in the fall, when Prior Lake is usually relatively
low. The construction would involve the removal of the existing structure, lengthening the outlet
pipe and appending a new outlet structure. The ongoing operation of the outlefwill involve opening I
the slide gate to outlet water between the elevations of 902.0' and 902.5', and periodically inspecting
the outlet during times of operation to ensure the structure remains clear of debris.
c. Explain the project purpose; if the project will be carried out by a governmental unit, explain the need I
for the project and identify its beneficiaries.
As indicated in item 6b above, the current Prior Lake outlet system is experiencing pressure due to I
increased development in the Prior Lake watershed and areas directly tributary to the channel and the
"wear and tear" of20 years of operation. The Prior Lake Outlet Channel and Lake Volume I
Management Study, completed in May 2003, documented the current condition of the watershed,
lake outlet and outlet channel, and future impacts of development on runoff volumes and the level of
Prior Lake. The study summarized the current restoration needs along the channel, quantified future I
runoff volumes, and explored opportunities for addressing future runoff volumes through a
combination of watershed management and increased efficiency of the outlet system. The study
. identified several reasons for needing the project, as follows:
. Both the outlet box and the channel are difficult to operate and' improvements are needed I"
to reduce operation and maintenance costs.
. The channel has some erosion problems from 20 years of use that need to be corrected.
. Flow in some portions of the channel is inefficient and causes highly fluctuating water I
levels in some of the lakes and wetlands, which in turn affects shoreline vegetation.
. Future development is expected to increase runoff volumes to the channel and the
channel needs additional stabilization to handle these volumes. I
. Future development is expected to increase runoff volumes to Upper and Low~r Prior
Lakes and a more efficient outlet is need to help protect about 80 homes in the
floodplains surrounding the lakes. I
Following an examination ofthe existing condition of the outlet and channel and the current and
predicted future watershed characteristics and runoff volumes, the study identified the following five I
strategies for managing future runoff volumes and lake levels:
1. Outlet Structure Modification: Increase efficiency
2. Rules for New Development: Incorporate an infiltration requirement
3. Land Management Program: Increase upstream storage by 1,500 to 3,000 acre- I
feet
4. Low Home Floodproofing or Buy-Out
5. Outlet Channel Improvements I
The five strategies represent a combination of approaches designed to address current and future
runoff volumes in the Prior Lake-Spring Lake watershed. The proposed project that is the subject of
this EAW addresses two ofthe strategies, the outlet structure modifications and outlet channel I
improvements (i.e. strategies 1 and 5). The other three strategies are either already being
implemented separately or are under consideration for future implementation. These strategies are
discussed in more detail in Item 29: Cumulative Impacts. I
The Outlet and Channel Improvement Project is a key component of the PLSLWD's overall plan for
managing watershed runoff and lake volumes into the future. The outlet channel is also an important I
component ofthe storm-water conveyance system downstream of Prior Lake, serving the
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U communities of Prior Lake and Shakopee, and potentially the Shakopee Mdewakanton Sioux
Community. Therefore, this proposed project is essential to the implementation of those
U communities' approved Comprehensive Plans and Storm Water Management plans. In addition,the
proposed extension of County State-Aid Highway (CSAH) 21 from County Road 42 to the north will
likely rely on the outlet channel for storm water conveyance (following ponding of runoffto provide
U' treatment). Therefore, the channel project is important to the implementation of the Scott County
transportation plan in this area of the county. The project is also needed to restore channel capacity
lost through years of erosion and sedimentation, and to stabilize the channel banks to avoid future
erosion problems. Finally, the project presents an opportunity to enhance the native plant
U communities, wildlife habitat and aesthetics of the outlet channel. Without this project, there will be
a greater risk offuture flooding around Prior Lake, the outlet chalmel will be less able to handle
future flow volumes and much more susceptible to erosion problems, and the high operation and
U maintenance requirements of the current outlet system will continue.
The beneficiaries of this project are the residents of the Prior Lake-Spring Lake Watershed, those
U Jiving tributary to the Outlet Channel in the cities of Prior Lake and Shakopee and in the Shakopee
Mdewakanton Sioux Community, and the citizens who travel through the watershed (of both Prior
Lake and the outlet channel) and enjoy its natural resources.
U d. Are future stages ofthis development including development on any outlots planned or likely to
happen?
uHYes, X,No,
m If yes; bfiefly-de;cribefururestages, relationship to present project, timeline and plans for environmental
review.
m e. Is this project a subsequent stage of an earlier project? _X _Yes _No
If yes, briet1y'describe the past development, time line and any past environmental review.
m This project involves restoration and improvement of an outlet and channel that were first
constructedintheearly1980s.The project received Department of Natural Resources and U.S.
ACOE permits and underwent extensive review, including the completion of an EA W, prior to
E construction.
7. Project magnitude data
m Total project acreage Construction limits: 100 ft. corridor along 7 miles of channel
Number of residential units: ,unattached N/A attached maximum units per building
Commercial, industrial or institutional building area (gross floor space): total square feet N/A
E Indicate areas of specific uses (in square feet): N/ A
Office Manufacturing
Retail Other industrial
E Warehouse Institutional
Light industrial Agricultural
Other commercial (specify)
m Building height N/ A If over 2 stories, compare to heights of nearby buildings
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E 5
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8. Permits and approvals required. List all known local, state and federal permits, approvals and financial I
assistance for the project. Include modifications of any existing permits, governmental review of plans and
all direct and indirect forms of public financial assistance including bond guarantees, Tax Increment I
Financing and infrastructure.
Unit of government Type of application Status I
Minnesota Pollution Control Agency NPDES Construction Site Permit TBC
401 Wetlands Certification TBC
Department of Natural Resources Public Waters Permit amendment TBC
US Army Corps of Engineers 404 Permit TBC I
City of Prior Lake Grading Permit TBC
Wetland Conservation Act TBC
City of Shakopee Grading Permit TBC I
Wetland Conservation Act TBC
TBC = To Be Completed I
Financial assistance is being provided for project planning and design from the Department of Natural
Resources Flood Damage Reduction Grant Program. ThePLSL WD will enter into a cost-share I
agreement with the cities of Prior Lake and Shakopee and potentially the Shakopee Mdewakanton
Sioux Community regarding easement acquisition and project design and construction costs. The
District will pay its share ofthe costs from its 103B capital improvements 509 fund/leVy (ad valorem I
levy) and potentially from the issuance of general obligation bonds.. .The District will finance this
project through its watershed-wide levy, which is an appropriate financing mechanism since the project
benefits the entire watershed due to the use of the outlet channel as a major storm water conveyance
system in the watershed. The importance of the outlet channel as a storm water conveyance system is I
evidenced in the requirement that the PLSL WD obtain a NPDES Phase II Municipal Separate Storm
Sewer System (MS4) Permit due to the District's ownership and operation of the outlet channel.
9. Land use. Describe current and recent past land use and development on the site and on adjacent lands. I
Discuss project compatibility with adjacent and nearby land uses. Indicate whether any potential conflicts
involve environmental matters. Identify any potential environmental hazards due to past site uses, such as I
soil contamination or abandoned storage tanks, or proximity to nearby hazardous liquid or gas pipelines.
Current land use along the channel corridor and within the watershed is shown inExhibit 7. Exhibit 8 I
presents the anticipated future land use along the channel based on City and County Comprehensive
Plans. Planned future land use along the channel is primarily city residential, with some commercial
areas tributary to the channel and one light industrial area adjacent to Segment 7 of the channel. I
The District owns easements along the channel segments that generally vary from 30 to 50 feet wide,
but are sometimes wider. The exception is the public waters such as Pike and Dean Lakes where the
District has a permit to discharge. (Note that the District is currently looking at options for acquiring I
easements around Pike Lake.) Easements along the northern part of the channel are owned jointly with
the City of Shakopee. Through the completion ofthe Prior Lake Outlet Channel and Lake Volume
Management Study the District learned that some of the easements were not recorded and in some I
cases do not match the existing channel location. The District intends to work with respective
landowners to change the easements in these situations to the correct location.
The proposed project is compatible with adjacent and nearby land uses in that the land use of the I
channel will not be changed during the project, and the aesthetics and habitat of the channel will be
enhanced by the proposed project. The channel has already been in use for more than 20 years and I
proposed changes are largely compatible with the existing, approved Outlet Operating Plan (Exhibit 4).
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I The only changes necessary to the plan for the proposed project are changing the Zone 3 maximum
discharge from 50 cfs to the maximum outlet channel capacity (which is 58 cfs at an elevation of
I 903.5), and Zone 2 from 20 to 30 cfs. The proposed use of bioengineering and natural plant
technologies will also increase the channel's compatibility with the greenway corridor that the City of
Shakopee has proposed along the channel. The project will also correct erosion concerns along the
I channel and will include removing a sediment delta from Pike Lake that was formed at least in part
during the re-construction of County Road 42, which wifiJurther protect downsfrdlm land,uses.
The PLSL WD is unaware of any potential environmental hazards due to past uses.. There is a
I Metropolitan Council Environmental Services wastewater interceptor that crosses the channel in
Shakopee, but that stretch of the channel was repaired/reconstructed in 2003 and no further work other
than ongoing vegetation maintenance will be needed in that area. There were no hazards encountered
I during the construction of the outlet channel in the early 1980's.
10.Cover types. Estimate the acreage of the site with each of the following cover types before and after
I development:
Before After Before After
Types 1-8 wetlands 39.3 (NWI) 39.3* Lawn/landscaping 0 0
I Wooded/forest 14.2 14.2** Impervious surfaces 1.8 1.8
Brush/Grassland 22.6 22.6 Other (describe) 3.9 3.9
Cropland 12.2 12.2 -- non NWI open water
n' .... __,_ TOTAL 94***
w__ "
I . - . . - .' .
If Before andAftel'iotals are not equal, explain why:
*Note that there may be some limited impacts to adjacent wetlands due to re-sloping the channel
I banks. However, those impacts are expected to be minimal andwill be ful1y addressed through the
permitting process.
** The project does involve tree thinning and selective branch removal to increase light penetrationto
the channel banks and encourage growth of native grasses and shrubs. Shade reduction will promote a
I prairie/savanna environment along the channel, except where it conflicts with existing maple-
. ,basswood plant communities.,
*** These acreages are based on a I OO-footwide construction corridor, centered on the channel,
I including,a ,100.,foot corridor through public waters along the outlet channel ,route. Note that no
construction is proposed in Pike, Dean or Blue Lake, other than the removal of the Pike Lakesediml;lnt
delta.
I 11. Fish, wildlife and ecologically sensitive resources
a. Identify fish and wildlife resources and habitats on or near the site and describe how they would be
I affected by the project. Describe any measures to be taken to minimize or avoid impacts.
Fish and wildlife resources on or near the site include the following:
I I) Lakes/Ponds. Flow from the Prior Lake outlet passes through Upper and Lower Jeffers Ponds
and Pike Lake in the City of Prior Lake, and Dean Lake and Blue Lake in the City of Shakopee.
I 2) Wetlands. Several wetlands are adjacent to or intersect the outlet channel, and a significant
wetland complex is found adjacent to the channel to the east of Dean Lake.
3) Sites of Biodiversity Significance. The Minnesota County Biological Survey for Scott County
I shows three sites of biological significance potential1y within the construction limits of the
project (see Exhibit 9: Mixed Emergent Marsh, Dry Oak Savanna and Maple-Basswood Forest).
4) Outlet channel itself.
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The proposed project would enhance these fish and wildlife resources by addressing remaining erosion I
problems along the channel and by enhancing the channel habitat through the use of bioengineering
techniques. In addition, riffle/pool areas have been incorporated into the Conceptual Plan for the I
channel to enhance fish habitat. The project will be completed through winter construction of channel
improvements followed by spring planting, which will minimize any construction-related fish and
wildlife impacts by scheduling that activity during the winter dormant period. I
b. Are any state-listed (endangered, threatened or special concern) species, rare plant communities or
other sensitive ecological resources such as native prairie habitat, colonial waterbird nesting colonies or
regionally rare plant communities on or near the site? _X_Yes _No I
If yes, describe the resource and how it would be affected by the project. Indicate if a site survey of the
resources has been conducted and describe the results. If the DNR Natural Heritage and Nongame
Research program has been contacted give the correspondence reference number: ERDB 20040670 I
Describe measures to minimize or avoid adverse impacts.
Exhibit 10 presents the results of a review of the Natural Heritage Database for state-listed species, I
rare plant communities or other sensitive ecological resources. While there are 34 known occurrences
of rare species or natural communities in the area searched, the DNR Endangered Species
Environmental Review Coordinator has stated that based on the nature and location of the proposed I
project it will not negatively affect any known occurrences of rare features. The PLSLWD did not
complete a site survey of the resources.
-._," , . ,-,.,,'-. '- . I
12. Physical impacts on waterresources.Willthepr()jectltlvolvethe physical or hydrologic alteration-
. dredging, filling, stream diversion, outfall structure, diking, and impoundment - of any surface waters
such as a lake, pond, wetland, stream or drainage ditch? _X_Yes _No I
If yes, identify water resource affected and give the DNR Protected Waters Inventory number(s) if the
water resources affected are on the PWI: -see discussion below.
Describe alternatives considered and proposed mitigation measures to minimize impacts.
The potential physical impacts on water resources can be divided into two categories:, the potential I
impacts from the outlet box improvements and the potential impacts from the channel
restoration/enhancement. The following paragraphs address each ofthese categories separately. I
Outlet Box Improvements: The outlet box improvements will involve replacing the current outlet
structure with a new design that operates more efficiently (i.e. moves water offthe lake faster) and I
requires less maintenance during operation. The current outlet structure involves an approximately 4-
foot square box with a front opening set at an elevation of903.0 feet, and slide gates on the side that
( must be manually removed and replaced to open and close the outlet. The maximum discharge I
capacity is limited to 65 cubic feet per second (cfs) by the 36-inch pipe that carries water
approximately Y2 mile from the lake, under County Road 21, to the Prior Lake Outlet Channel.
The operation ofthe outlet is guided by the PLSLWD's Outlet Operating Plan, which was approved by I
the DNR and the City of Shako pee in July and August, 1987 (Exhibit 4). The Operating Plan
designates when the outlet can be opened and the allowable discharge rates, which depend on the lake
elevation and the time of year. I
Currently, at lake levels above 903.2 feet the outlet pipe controls the discharge from Prior Lake, rather
than the gates on the outlet box. At a lake elevation of904.0 feet, the approximate discharge from the I
outlet is 59 cfs (see table below). The proposed outlet modification would allow the full capacity of
the pipe to be reached at a lower lake elevation than the current structure allows. Table 1 provides the
discharge rates at various lake levels that would be occur with the proposed outlet structure. The I
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I discharge rates wen: calculated using the rating curve developed for the proposed modified outlet (see
Exhibit 11).
I Table 1. Lake level-discharge relationship with proposed modified outlet box.
Lake Level (MSL) Current Discharge Rate Discharge Rate with
I ~ '," I (assUmiDl! a1l2ates are open) Modified Outlet
902.58 21.36 6.72
903.0 , 49.83 56.75
903.5 57.75 57.75
I 904.0 58.73 58.73
904.68 (highest lake level observed 60.08 60.08
since outlet was constructed)
I The effect of the proposed outlet modification is toincrease the efficiency of the outlet. This improved
outlet efficiency would decrease the amount of time the level of Prior Lake would be above the
I ordinary high water level (OHW) of 904.0' - and the corresponding flooding, water quality and
recreational impacts - without altering the level at which the outlet would begin discharging water.
I This modification would not change the overall capacity of the outlet, which is limited by the pipe
under County Road 21. It also would not change the total amount of water discharged from Prior
Lake, since as soon as the lake receded to an elevation of902.5' the discharge would cease. However,
I the PLSLWD does intend to pursue the following two changes to the Outlet Operating Plan:
. Allow the outletting of water between a lake elevation of902.0'and902.5' in the fall if
conditions suggest there is a potential for high water levels in the spring, and
. Increase the maximum discharge rate during the spring (or fall, if allowed) discharge period
I - i.e. between lake elevations 902.0' and 902.5' - from 20 cfs to 30 cis.
These proposed changes in outlet operations could result in slightly higher volumes of water being
discharged from the outlet. However, it is more likely that the addition of a fall discharge period and
I an increase in the allowed discharge, rate from 20 cfs to 30 cfs would simply reduce the intensity of
discharge that would be needed during the spring or e,arly summerto avoid flooding on the lake.' In
that case the total volume would not change, and the physical effects of the Prior Lake outlet on
I downstream water resources would be lessened compared to current conditions by the ability to outlet
water at a slower rate and avoid long periods of maximum discharge following wet springs or early
summer rainy periods. The PLSL WD feels that early release at modest flows is easier on the channel
I than storing the water in the lake and releasing at higher flows later in the year. In addition, any spring
or fall discharge below a lake elevation of902.5'would need to be approved by the DNR, a process
which provides further controls and consideration of the potential for downstream impacts and the
I potential for low lake levels the following year.
The PLSLWD's proposed modifications to the Outlet Operating Plan will need to be considered and
I approved by the DNR and downstream communities as part of the Plan revision process, which will be
initiated after this EA W. Note that the proposed outlet box modifications and changes to the operating
plan were included in the Prior Lake Outlet Channel and Lake Volume Management Study, which was
completed after much discussion with and review by interested communities and regulatory agencies,
I including the DNR, City of Prior Lake, City of Shakopee and Lower Minnesota River Watershed
District.
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Table 2. Proposed modifications to Outlet Operating Plan. I
Zone/Lake Elevation Current dischar e rate Pro ased dischar e rate
1: Above 903.5' Maximum channel ca acity Maximum outlet channel ca acity I
2: 902.5' to 903.5' o to 50 cfs Maximum outlet channel capacity
(dischar e ca aci at 903.5 = 57.75 cfs)
3: 902.0' to 902.5' o to 30 cfs* I
March, A ri1, October, November
4: below 902.5' No discharge
(other than March & A ril) other than March, A ril, October, Nov.)
*Requires approval ofDNR Regional Office, based on an analysis of expected lake level increase due to I
snowmelt and upstream reserves.
Construction of the proposed outlet modification would occur during a period of low water when the I
outlet is closed, most likely during the late fall and winter. The current outlet structure would be
removed and the outlet pipe lengthened to move the outlet structure out further into the lake bed. This
would allow water to be discharged through all sides of the outlet structure, thereby increasing the I
outlet's efficiency. Care will be taken to ensure that the outlet channel is stable and able to accept the
slightly increased rate of discharge that the modified outlet would allow at lower lake water levels.
Channel RestorationlEnhancements: As described in item 6b above, the restoration and enhancement 1
of the outlet channel will rely on a combination of ''traditional'' engineering techniques to provide
stability and resist bank sloughing, and bioengineering or "natural" vegetation techniques to provide
upland soil stability. The following table presents the construction quantities for each segment of the I
channel. Exhibit 3 provides a diagram of the channel and the project construction limits, including
adjacent and intersecting wetlands. Note that while a wetland delineation has not yet been completed
for the entire channel, some segments have been partially delineated in preparation for some proposed I
housing developments. The PLSLWD will obtain a delineation for each segment of the channel as the
permitting moves forward for each phase of the project.
TableJ. Construction quantities by channel segment. I
Sel!ment RipraD(vd3) Backfill (yd3) Sediment Removal Off-site (vd3)*
I " 319 75 I'
2 457 138 2,660 (removal of Pike Lake delta)
3 536 148
4 304 I
5 453
6 193
7 2,091 3939
8 759 I
TOTAL = 5,112 138 6,826 ,
*The location and permitting of off-site disposal sites will be the responsibility of the project
contractor(s), although the PLSL WD will check to be sure that the contractor has obtained all I
necessary permits.
The specific physical impacts of the channel project on water resources are explained for each channel I
segment in the paragraphs below. Note that the descriptions below do not include the bioengineering
techniques to be employed as that element ofthe project is conceptually the same for all channel
segments and does not present a potential physical impact on water resources. Additional information I
can be found on the Conceptual Plan diagrams of Exhibit 5. Following the segment details, a
discussion is provided regarding the alternatives considered and any mitigation that may be needed.
I
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I Segment 1: The restoration and enhancement plans for this segment involve re-sloping the channel
banks to a 2:1 slope, adding rip-rap to protect the toe of the bank slope, and using native plants to
I stabilize the channel banks. Some sediment will be removed from a delta located atthe wetland just
north of where the outlet pipe daylights and west of CR 21. However, this excavation does not
constitute a physical alteration as it simply involves removing accumulated sediment that has been
I deposited over time and restoring the original bank configuration.
In addition to the channel reshaping and sediment removal, the outlets for both Upper and Lower
Jeffers ponds will be modified. The two pipes that currently serve as the Upper Jeffers pond outlet will
I be removed and replaced with an open channel "waterfall" feature that allows the water to flow across
an 8-foot elevation change from Upper Jeffers pond to Lower Jeffers pond. This outlet modification
will decrease the bounce on Upper Jeffers pond when theoutIet is open, which will help improve the
I wetland habitat of this pond.
The outlet on Lower Jeffers pond will also be modified to address an existing erosion problem. The
I new outlet will be set at an elevation of 865.5', which will allow the pond to meet the DNR rule-of-
thumb that the bounce in the pond reaches the oHW (elevation 866.0') roughly once every five years.
Note that along this segment ofthe channel there are a couple areas identified as wetlands in the NWI
I or Scott County Wetlandlnventory.inaddition to Jeffers Ponds. The channel work in these areas will
involve re-sloping the banks, placing rip-rap on the toe of the banks and installing rock cross-vanes to
direct the energy of the stream. The PLSLWD will apply for all permits required to conduct the
I channel projectin these wetland areas and willtake the necessary steps to avoid or mitigate any
wetland impacts associated with the project. Overall, the result of the project will restore the channel
configuration; stabilizecthe-banks to protect against future erosion, and enhance the native vegetation
of the channel and adjacent/intersecting wetlands.
I -'
Segment 2: For this segment, construction will primarily involve installing 20' by 30' plunge pools at
downstream ends of culvert crossings, resloping banks at 3: I for the lowest 10 feet of the channel, and
I using rip-rap and bioengineering to stabilize the channel and banks. ,In addition, 2,660 cubic yards of
sediment will be removed from the inlet of Pike Lake to restore that stretch of the channel to its
original condition; Neither theNWlnor the Scott County Wetland Inventory show wetlands in this
I area; however, a wetk~nddelil1eationwill be completed during the permitting process for construction
of this segment. In adgition,the outlet channel, itself in this area is a protected water under DNR
jurisdiction.
I Segment 3: Construction in this segment will consist of ins taIling three plunge pools, removing rock
from the bed of the channel and re-using it on the toe of the slope, supplementing an existing culvert to
I improve flow, and constructing 2 riffles to enhance fish habitat. The NWI shows two wetlands along
this stretch of channel, one of which is a DNR protected water (249W), and the channel along this
stretch is also a protected water. Physical impacts to wetlands along this segment are expected to be
minimal, if at all, as no work will be done within the wetlands themselves. The culvert to be
I supplemented is downstream of the NWI wetland. The purpose of installing the additional pipe at the
channel crossing is to reduce the head on the upstream side ofthe crossing, thereby lowering the
bounce that the wetland experiences when Prior Lake is outletting. When the outlet is in use, flow
I reaches a steady state as the storage is consumed such that this change will just serve to equalize the
level on either side of the driveway. This will also reduce the probability of the driveway crossing
being overtopped during periods of heavy rains when the outlet is discharging. An additional benefit
I of the second pipe is a better distribution of flow across the channel downstream of the crossing, which
will reduce point velocities, decrease erosion potential and improve stream habitat. No downstream
impacts are expected since a more restrictive culvert is located just shortly downstream at the Pike
I Lake Trail road crossing.
I ] ]
I
Segment 4: Segment 4, which extends from Pike Lake Trail to County Road 16, is currently exhibiting I
severe erosion on its downstream reach due to impacts from cattle. The construction effort for this
segment will involve re-sloping the channel banks, installing a plunge pool downstream of the culvert I
under Pike Lake Trail, installing rip-rap along the toe of the bank, and adding fence and a dry crossing
to exclude cattle from the lower reach of this segment. The NWI shows linear wetland along about
half of the channel in this segment, and the chl:u;mel itself is also a protected water. Physical impacts to
the channel and wetland will be minimal, however, as the proposed construction will restore the I
channel to its design condition, address an existing erosion problem, and prevent future erosion
problems.
Segment 5: Construction along this segment will involve installing or extending plunge pools on the I
downstream side of four culverts, re-sloping the banks, adding rip rap to the toe of the bank, and
installing four riffles for fish habitat. The NWI shows a large wetland complex along much of this I
stretch of the channel, although much of the channel here was dug through the wetland as part of the
original outlet project in the early 1980s. As delineations are completed for this stretch, potential
wetland impacts will be better quantified and addressed through the permitting process. However, as I
with the other segments of the channel, few if any negative physical impacts on the existing channel
and adjacent/intersecting wetlands are anticipated.
Segment 6: This segment includes Dean Lake (DNR #74P) and a wetland complex north of Dean I
Lake. The only construction planned for this section (other than vegetation plantings) is placing rip-
rap on the eroding banks to two feet up from the toe of the bank. In addition, the potential for I
. meandering the channel in the area downstream of Dean Lake or constructing im infiltration wetland
adjacent to the channel will be investigated as [mal design moves forward for this segment.
Segment 7: A large amount of sand - an estimated 3,939 cubic yards - has accumulated in the channel I
through this reach due to pumping from the adjacent quarry. This sediment is proposed to be removed
to restore lost channel capacity and maintain channel alignment, and the banks stabilized through
resloping, rip-rap and bioengineering to prevent future erosion problems. The NWI shows one I
wetland in the path of the channel and a couple adjacent to the channelinthis segment. The physical
impacts of the project on these wetlands are expected to be minimal as the project involves removing
sediment that has been accumulated over the years and resloping the banks, but not deepening the I
channel.
Segment 8: Much of this segment exists within the Minnesota Valley National Wildlife Refuge I
(MVNWR). Here the banks will be re-sloped to restore the original channel configuration and some
rip-rap will be added to stabilize the channel banks. The PLSL WD also intends to pursue a change in
its easement for the channel within the MVNWR to allow the channel to self-monument.
Alternatives considered: I
In the planning process that led to the development ofthe Conceptual Plan for the Prior Lake Outlet
Channel, the PLSL WD considered several alternatives to the proposed channel project. Table 4 I
presents the alternatives considered along with their overall costs and associated environmental
impacts.
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I Table 4. Summary of alternatives considered.*
Alternative Estimated cost** Evaluation Notes
I A. Selective improvement of $3,740,968 . Stabilizes channel
limited sections of the channel . Enhances in-stream and corridor habitat through
using traditional and soil stabilization and soil bioengineering/native
I bioengineering techniques. plant technologies "..' ,'~,.
. Most compatible willi-potential gr-eenway
. Improves water quality through soil stabilization
and creation of native lant buffer
I B. Overall improvement, $6,475,040 . Stabilizes channel
including are-design of the . May create slight habitat improvement with more
entire channel and stable channel/less sedimentation
I stabilization with rip-rap. . Some water quality improvement through soil
stabilization
. Permitting authorities not in favor of "fully-
I armored" channel
. Somewhat compatible with greenway, although less
of a "natural" aesthetic
C. Improvements to the $9,403,854 . Potential for significant downstream impacts due to
I channel and the addition of a added flow ,'.
low-flow pipe. . Difficult to permit
. Hi h cost
I" D. Enlargement ofthe $9;528,742 . Potential for significant downstream iiripacts due'to
" channel to a.llow the addition added flow . " . '
of an additional outlet pipe . Difficult to permit
under County Road 21. . High cost
I E. No Action - repairs Increased . Channel more susceptible to erosion problems
continued on an as needed maintenance costs . No enhancement of native plant community or
basis, but overall coordinated stream/corridor habitat
I improvement not . Does not advance green way potential'
im lemented;. *Summarized from Prior Lake Outlet Channel and Lake Volume Management Study.
.".1 . **Includeseasement, design, construction (including vegetation) and administrative costs.
Option A, the option that was selected through the planning process, is both the least cost and the most
I environmentally preferable alternative. As discussed above forthe various segments, significant
impacts to wetlands are not expected as the amount of disturbance to wetlands along the channe.I .
corridor has been minimized with the selection of this alternative and with the use of bioengineering
technologies. In addition, mitigation will consist of following the Wetland Conservation Act and
I Section 404 requirements of the Clean Water Act.
13. Water use. Will the project involve installation or abandonment of any water wells, connection to or
I changes in any public water supply or appropriation of any ground or surface water (including
dewatering)? _Yes _X_No
If yes, as applicable, give location and purpose of any new wells; public supply affected, changes to be
I made, and water quantities to be used; the source, duration, quantity and purpose of any appropriations;
and unique well numbers and DNR appropriation permit numbers, ifknown. Identify any existing and
new wells on the site map. If there are no wells known on site, explain methodology used to determine.
I 14. Water-related land use management district. Does any part of the project involve a shoreland zoning
district, a delineated 100-year flood plain, or a state or federally designated wild or scenic river land use
district? X Yes No
I - - -
If yes, identify the district and discuss project compatibilitywith district land use restrictions.
I 13
I
Nearly the entire open channel south of Highway 169 is within a shoreland management district. I
Exhibit 12 identifies the shoreland zoning districts along the outlet channel within the cities of Prior I
Lake and Shakopee. The most downstream stretch of the channel is also within the delineated 100-
year floodplain for the Minnesota River; there is also a floodplain delineation for Pike Lake, through
which the channel flows. I
The project does not involve any activities or structures that are incompatible with shoreland zoning.
It is also compatible with floodplain restrictions as it involves primarily excavation. Any placement of
fill will be limited to the use of rip-rap to stabilize existing or anticipated erosion zones. This use of I
rip-rap is necessary to restore the channel banks and maintain channel stability, and does not constitute
floodplain fin. The project will not impact the Pike Lake floodplain elevations as the maximum flow
rate and flow volume from Prior Lake will not be altered. I
15. Water surface use. Will the project change the number or type of watercraft on any water body? _Yes
_X_No I
If yes, indicate the current and projected watercraft usage and discuss any potential overcrowding or
conflicts with other uses.
16. Erosion and sedimentation. Give the acreage to be graded or excavated and the cubic yards of soil to be I
moved:
Maximum of 12 a.cres(max; ,1 00 ft. corridor along 7 miles of channel); 4596 cubic yards. I
' ~
Describe any steep slopes or highly erodible soils and identify them on the site map. Describe any
erosion and sedimentation control measures to be used during and after project construction. I
Areas of highly erodible soils exist in Segments 4 through 7 of the channel (see Exhibit 13). In
particular, much of Segment 7 consists of highly erodible Zimmerman soils, and has exhibited erosion
problems in the past. One ofthe main purposes ofthe entire project is to restore eroded areas and I
prevent future erosion problems. Many of the design elements of the Conceptual Plan for the outlet
channel are focused on increasing channel stability and decreasing the potential for erosion. The use
of toe protection, rock vanes and bioengineering (natural plant technology) for bank stabilization are I
all designed to dissipate water energy, directit away from the banks, and protect against bank erosion
and slumping.
During construction, erosion and sediment control measures will include perimeter control (i.e. silt I
fences, bio-Iogs) to retain sediment on site and the use of biodegradable erosion control
blankets/matting to maintain soil stability while plants are becoming established. All I
construction/physical earth-moving will be completed during the winter, when the risk of run off-
caused erosion is low. Pennanent seeding and planting of disturbed areas will be completed as early as
possible in the spring (and some plants, such as willow and dogwood stakes, will be planted during the I
winter dormant period), and temporary seeding and erosion control blankets will be used as necessary
to prevent erosion as the native plants become established.
All phases of the project will include a two-year vegetation maintenance period that will require the I
seeding/planting contractor to monitor for plant establishment, fix any site erosion, reseed or re-plant
as necessary, and maintain the planted/seeded areas for two years to encourage establishment of native
plants and discourage invasive exotic species. I
As permitting and construction plans move forward for each phase ofthe project, the PLSL WD will
develop a Stormwater Pol1ution Prevention Plan (SWPPP) specific to each construction phase. Each I
SWPPP will specify in greater detail the erosion and sediment control practices, including seeding and
14 I
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I planting timelines and inspection practices, which will be employed during that particular phase of
construction.
I All necessary erosion control practices will also be followed for sediment that is excavated and
removed off site. While the location ofthe soil disposal site(s) and the acquisition of required permits
I will be the responsibility of th(;l contractor, the PLSL WD will check to be sure the permits have been
obtained prior to commencement of construction.
I 17. Water quality: surface water runoff
a. Compare the quantity and quality of site runoff before and after the project. Describe permanent
controls to manage or treat runoff. Describe any stormwater pollution prevention plans.
I The proposed project does not add any impervious surface or create any new/additional runoff
amounts. However, the project does make some changes to how runoff is managed to protect against
flooding around Prior Lake and to improve conditions along the outlet channel. Note that potential
I water quality issues associated with future. runoff to the outlet system are discussed under Item 29:
Cumulative Impacts. This section discusses the potential water quality impacts of the proposed
changes to the outlet box (including the Operating Plan) and the channel restoration and enhancement.
I Outlet Box Improvements: As discussed in Item 12 above, the Prior Lake outlet is currently managed
according the PLSLWD's approved Outlet Operating Plan (see Exhibit 4). This plan sets allowable
I discharge rates based on the elevation of Prior Lake and the time of year; As explained in Jtem 12, the
PLSL WD is seeking two modifications to the Operating Plan; which will need to be considered and
approved by the DNR and downstream communhiesasparfofthe Plaurevision process following the
I completion of environmental review. While it is more likely that the proposed modifications to the
Outlet Operating Plan would simply reduce the intensity of discharge that would be needed-during the
spring or early summer to avoid flooding on the lake, the modifications could potentially result in a
slight increase in the total volume of water discharged from the outlet. However, the potential increase
I is so slight that it does not register when the hydrologic model for the watershed is run using actual
rainfall conditions from the years 1998 through 200LTable 5 presents the discharge from the outlet
predicted by the model under existing conditions and with the proposed modifications to the outlet
I operating plan. The table shows that increase discharged from the lake will not be significant. In
general, the project removes water froill}>rior ~ake more quickly, but does not significantly increase
the volume discharged under existing conditions. ...,
I TableS. Discharge from Prior Lake under existing and proposed outlet conditions.
Existing Conditions Proposed Conditions Change
I Year Discharge (ac-ft) Discharge (ac-ft)
1998 14,970 14,970 0
1999 12,451 12,451 0
I 2000 4,611 4,611 0
2001 9,656 9,656 0
I The proposed outlet box modifications will not alter the quality of water discharged from Prior Lake in
any way. Note that the PLSLWD and other local governments, groups and agencies are actively
engaged in projects to improve the water quality of the Prior Lake chain of lakes (Spring, Upper Prior
I and Lower Prior Lakes) and reduce nutrient loading to the lakes. Over time, these efforts will lead to
even better quality water being discharged from Lower Prior Lake when the outlet is open.
I
I 15
I
Channel Restoration/Enhancement: As with the outlet box improvements, this proposed project will I
not in itself increase storm-water runoff from the channel. However, future increases in runoff volume
from the watershed tributary to both the lake system and the channel itself were considered as part of I
the project planning effort, and are discussed in Item 29: Cumulative Impacts below.
This project will enhance the quality of water flowing through the channel by making the channel I
more stable with respect to permanent erosion control. The structural and vegetative techniques
described elsewhere in this EA Ware designed to restore eroded sites and prevent future erosion. This
will reduce the amount of sediment and associated nutrients carried by the outlet channel and deposited
downstream, thereby improving water quality. Long-term bank stabilization and erosion control is one I
of the main goals of the channel restoration/enhancement project. In addition, the use of native plant
technologies to stabilize the channel banks and the extension of the PLSLWD's easements along the
channel will provide a wider and better-quality buffer along the channel corridor. This buffer will I
filter overland runoff that reaches the channel, trapping sediment and keeping it out of the channel and
downstream lakes and wetlands.
I
Another element that will help to improve the quality of runoff reaching the channel is the I
implementation of permitting for land-disturbing activities and NPDES Phase II requirements within
the tributary watershed. The City of Prior Lake, the City of Shakopee, the Shakopee Mdewakanton I
Sioux Community and the PLSL WD all have rules/development requirements and Storm Water
Pollution Prevention Programs that include requirements for storm-water quality best management
practices for use with new andre-development. These rules and plans are discussed in greaterdeta.il in I
Item 29: Cumulative Impacts.
b. Identify routes and receiving water bodies for runoff from the site; include major downstream water
bodies as well as the immediate receiving waters. Estimate impact of runoff on the quality of receiving I
waters.
Exhibit 14 shows the overall Prior Lake-Spring Lake Watershed District in relation to the outlet I
channel. Drainage in the watershed generally flows north and east from the southern portions of the
District to Spring Lake. Spring Lake then discharges to Upper Prior Lake which in turn discharges to
Lower Prior Lake. The only outlet from Lower Prior is the outlet box and channel. The total drainage I
area to the outlet box (Le., the start of the outlet channel system) is approximately 30 square miles.
Exhibit 3 shows the route of the outlet channel and the major downstream water bodies: Jeffers Ponds, I
Pike Lake, Dean Lake, Blue Lake and the Minnesota River. All of these waters (other than the
Minnesota River) exhibit water level changes when the outlet is discharging, with the level of change
dependent on the rate of discharge from Prior Lake and the amount of inflow from the subwatersheds I
directly tributary to the outlet channel.
It is important to emphasize that the Prior Lake outlet has been operating for more than 20 years and
any impacts of this operation are reflected in the existing conditions/baseline for this project. I
Therefore, the water quality assessment presented below was completed to document the existing
conditions (i.e. the current outlet and channel operations) and explore the potential impacts of the
proposed outlet modifications and channel restoration and enhancement on existing conditions. I
Detailed nutrient budgets were not completed since there is existing monitoring data available for use
in assessing impacts, and because the water quality impacts associated with this project are anticipated
to be minimal, or even beneficial. I
Lower Prior Lake, the site of the Prior Lake outlet and therefore the source of lake water to the
channel, has been monitored for a number of years by the PLSLWD through the Metropolitan I
Council's Citizen Assisted Monitoring Program (CAMP) at two sites. This data is summarized in
16 I
I
I Table 6. Site 2 is nearest the outlet; therefore, data from this site was used to represent the quality of
the water discharged. In general, the water quality of Lower Prior Lake is good. A comparison of
I Lower Prior Lake growing season water quality data to the ecoregion values for the North Central
Hardwood Forests ecoregion (MPCA Volunteer Surface Water Monitoring Guide, 2003) shows that
the data for Lower Prior Lake sites are with the inter-quartile range for reference lakes in this
I ec:~region. The inter-quartile range represents the 25th and 75ili percentiles, or 50% of the reference
iakes in the region. These ranges for the North Central Hardwoods Region are:
. 23-50 J.1g/L for TP
. 5-22 J.1g/L for Chlorophyll-a (Chi-a)
I . 1.5 to 3.2 meters for secchi disk transparency
I Table 6. Lower Prior Lake Growing Season Average (May-Sept.) Water Quality!
Site Year Total Phosphorus Secchi Disk, Chlorophyll-a
P u /L Meters Chl-a u fL
1 1999 17 2.4 10
I 2000 24 2.9 12
2001 21 2.4 14
2002 26 2.5 13
I 2003 40 3.3 8.0
2 1999 35 1.8 12
2000 28 2.0 17
2001 ..29 1.8 22
I H2OO2 37 1.8 28
2003 2 2 2
-- --
I In addition to monitoring Lower Prior Lake, the PLSL WD has supported monitoririg on Pike Lake"
(which is within PLSL WD boundaries), and also encouraged the inclusion of Dean Lake in the CAMP
program (Dean Lake is outside the PLSLWD jurisdictional boundaries). This monitoring has shown
I that both Pike Lake and Dean Lake have fairly poor water quality, with summer averages of TP,
chlorophyll and secchi disk transparency suggesting that both lakes are nutrient rich. However, the
relatively good-quality water 'discharged from Lower Prior Lake actually helps to improve the quality
I of downstream waters when the outlet is open. This is due to the dilution effect provided by the Lower
Prior Lake water, which is much lower in Pl1osphorus than the water residing in Pike and Dean Lake.
The positive impact of thePriorLake discharge can be seen in Figures 1 and 2 below, which present
I monitoring results for Pike and Dean Lakes along with a description of the outlet status (open, partially
open, closed) during thesulllITIers of 2002 and 2003. Some data was also collected in 2001; however,
very little water was discharged from Prior Lake that year. As the figures below indicate, there is
seasonal variability to the water quality of the lakes, but the quality of both lakes improves when the
I Prior Lake outlet is open.
I
I
I 1 Data sources include the PLSL WD Annual Report 2002 and the CAMP monitoring program by the Metropolitan
Council.
2 Site 2 not monitored in 2003.
I
I 17
I
Figure 1: Pike Lake Water Quality I
Pike Lake Site 1 2001 Total Phosphorus I
250
200 . I
.
:::! 150
Cl
::I I
0: 100
... . . IlIf.~~!{\~.'llijml~rfi.1
50 -
0 :>~8!'~~;p~~l~~~p'~Q,Li;1 I
5/9 5/29 6/18 7/8 7/28 8/17 9/6 9/26 10/16 11/5
Date
I
Pike Lake Site 1 2001 Secchi Tranparency I
3.5 I,
3 :;Qy!I~!fi~HliigH~[c&:;[!
~
Q) 2.5.
....
Q) 2 - ,.-+ I
~
j 1.~ ---',I~~i!!~!~lJldtjtiy~
I
0.5 - . .
0 . . .
5/9 5/29 6/18 7/8 7/28 8/17 9/6 9/26 10/J6
Date _____J I
r- ' - -~ I
Pike Lake 2001 Site 1 Chlorophyll-a
I
300
250 . . I
I
::::! 200 I
C) .. ,
::I !
iii' 150 ._.'~M'__N_'~'M__'~_"_"___"'_'" -"-"._--.~.-(5ufieTCTosecr"._..." --'.".'''r i I
...!. Outlet Open i
c3 1 00 -
i
!
50 . I
. . I
0 !
4/19 6/8 7/28 9/16 11/5 !
Date I I
1 !
---.-------...--. ---
18 I
I
I Figure 1: Pike Lake Water Quality (cont.)
I Pike lake Site 1 2002 Total Phosphorus
I 350
300
250 ~,):; '::o.U1i.,,'%I6~~:!&:fi!t%!i\'l~
...J
I "D1 200
~
c.~ 150
I-
100 .
I ,50
0
4/4/2002 5/24/2002 7/13/2002 9/1/2002 10/21/2002 12/10/2002
I Date
I -
Pike lake 2002 Secchi Tranparency
I 1.2
Ie .
~ 1 ~--f~;1~\\l\~;'~~~ji
I ~ 0.8
al
~
ft 0.6
:c ...
I ~ 0.4 1-'. .
al
I t/) 0.2 e . .
"""
0
I 4/4/2002 5/24/2002 7/13/2002 9/1/2002 1 0/21/2002 12/10/2002
Date
I --------- _____.,____1
r- Pike Lake 2002 Chlorophyll-a ~
I I
!
180 +
I 160.
140
I :::! 120 I
C'l +
I i ~ 100" , .'OutletOpen I
I ca 80 I
I ..!.
.c 60
I (,) I
+ i
40 -. !
I i 20 +-' . . .+ i
I o , i
i 4/4/2002 5/24/2002 7/13/2002 9/1/2002 10/21/2002 12/10/2002 \
!
I ! ;
I Date
i
i_._ ,----- .'
I 19
I
Figure 1: Pike Lake Water Quality (cont.) I
Pike Lake Site 1 2003 Total Phosphorus I
450 I
400 - .
350 ill~tti~jmn~ffimili~Jj~i .
.J 300 . I
en 250 ~jl~~~ . I
::s . .
0: 200
I- 150 I
100 ~1~11]~~~1I~lf~:~lfl.~~$!lrl~~J~i1[r~~~~~11 I
. .
50
0 I
3/20/2003 5/9/2003 6/28/2003 8/17/2003 10/6/2003 11/25/2003
Date
I
Pike Lake Site 12003 Secchi Transparency I
i:~: -ll... ~m-
I
:!: 1 .. . .. .
f ~.: ~.d ,.1. I
en 0:4 ~r:i;;J:0~En~f:'~;R~[;;;T;-~::;:] · · .
0.2 . ...
0 , '" ,.,. .' . I
-.- -
3/20/2003 5/9/2003 6/28/2003 8/17/2003 10/6/2003 11/25/2003
Date I
---- __J
Pike Lake Site 1 2003 Chlorophyll-a I
600 I
500 . -
.
::::! 400 I
C')
::s .
ca 300 . .
...!.
t3 200 -['I~!.It!~~,;~~;;1_7"";~~!~"~~~~'___; ,__ I
100
. .... ........ .... .. . I
0
' ! I
3/20/2003 5/9/2003 6/28/2003 8/17/2003 10/6/2003 11/25/2003 !
i
I Date
!
----------.--. 20 I
I
I Figure 2: Dean Lake Water Quality
I Dean Lake 2002 Total Phosphorus
I 300 ~:,",.:::_, "',:.:_,.:,~::_:...~LQ~~~t~i:9.jfl.~~~:X,~,:'~,J.:,,::;..:.,:,:;;
250
I ..J 200
-
Cl
::l 150 .
0:
I- 100 .
I . .
50
0
I 4/4/2002 5/24/2002 7/13/2002 9/1/2002 10/21/2002
Date
I Dean lake 2002 Secchi Tranparency
I 0.9
0.8 "
, ",...' >i" ' 'Outlet Closed":":':':;'-:
0.7 --:.:"iM:._..:......:~...:::;.:":::.-:~:..-:':'.::' '-':;:"':';.:':"."'i':'::'.~.':.-;:.;'.:-;::.; :;::~:"':'.';':'-.::7:7:~:':::;:~::':::',~':";;:':r:':'~s".'"I
I :2: 0.6 I~i~!~~!~~i~ji~ir~iil -
:i 0.5 ~ ~ . ~ .
() 0.4
() --
I Q) 0.3 ..
U> - ----.--
0.2
0.1
I 0 , , cc-
4/4/2002 5/24/2002 7/13/2002 9/1/2002 10/21/2002
Date
I -------- ---------
I I Dean Lake 2002 Chlorophyll-a I
I
I
I 120
I
I 100 I
I
...I 80 - I
c,
I ::I
elf 60 - I
..!. . Outlet Open I
.c:: 40 --
() I
20 . I
I . i
.
0 ,
i 4/4/2002 5/24/2002 7/13/2002 9/1/2002 10/21/2002
I ! Date
i
I !
L-___,.____,____ -.---
I 21
I
Figure 2: Dean Lake Water Quality (cont.) I
Dean Lake 2003 Total Phosphorus I
600 I
500 :S:9'@~Fpa~r.fJ:>p~~>:,'1 .
..J 400
- I
C')
= 300 :Pl1tiet:;ppen,1 .
f= 200
1 . . .
100 I
. . ~M~il!M!W~iffiil[~iijlit![~I~~i~mm~~~1:m~mBl!ill
0 , ,
3/20/2003 5/9/2003 6/28/2003 8/17/2003 10/6/2003 11/25/2003
Date I
- -
I Dean Lake 2003 Secchi Transparency I
0.9 I...,..
0.8 .
0.7 I
:i 0.6
:i 0.5 . .
u 0.4
u I
Q)
U) 0.3 .
0.2 mlli~I~JIfII -'-'-'~:':~:~':TgutretQ'@-~~~::-"C:.~,~":,:::,j::;:,:'-:':
0:1 I
0
3/20/20035/9/2003 6/28/2003 8/17/2003 10/6/2003 11/25/2003
Date I I
--
I ~ I
I Dean Lake 2003 Chlorophyll-a
I
I
I 60 I
I
I Outlet Open
;
I .
I 50
I 40 .
I -- ----_._----_.~--,-_..__._--_._- I
, III 30 . .
i .c:
I u
20 ~-.-. I
.
! 10 "
. ' , """'" ,,""" ,""'" "",,"" ',' """""" "I
! ";'.',',,"';'.'-'.::, ,;': ,:::'::;:! 9~n~f'c,lp~'~~ .':.::}1::'['!'::,:,;;".""::,,
I 0 I
3/20/2003 5/9/2003 6/28/2003 8/17/2003 1 0/6/2003 11/25/2003
i Date i
-.-.--....--..- ---_._-- 22 I
I
I Since the total volume of discharge is not expected to increase significantly due to the project, the
phosphorus loading to downstream waters will also not increase. In fact, the sediment and
I phosphorus loading will likely decrease somewhat due to reduced erosion, increased buffers along
the channel and exclusion of cattle from the channel along Segment 4.
I -,--"c,--_18. Water quality: wastewaters -. -'-'-~''''-''''=
a. Describe sources, composition and quantities of all sanitary, municipal and industrial wastewater
produced or treated at the site.
I N/A. No wastewater will be produced or treated at the site by the project.
b. Describe waste treatment methods or pollution prevention efforts and give estimates of
I composition after treatment. Identify receiving waters, including major downstream water bodies, and
estimate the discharge impact on the quality of receiving waters. If the project involves on-site
sewage systems, discuss the suitability of site conditions for such systems.
I N/A
I c. Ifwastes will be discharged into a publicly owned treatment facility, identify the facility, describe
any pretreatment provisions and discuss the facility's ability to handle the volume and composition of
wastes, iden~ifying any irllprovements necessary.
I N/A
d. Ifthe project requires disposal of liquid animal manure, describe disposal technique and location
I and discuss capacity to handle the volume and composition of manure. Identify any improvements
necessary. Describe any required setbacks for land disposal systems.
I N/A
19. Geologic hazards and soil conditions
a. Approximate depth (in feet) to ground water: N/ A minimum average
I to bedrock: N/A mInimUm average
Describe any of the following geologic site hazards to ground water and also identify them on the site
map: sinkholes, shallow limestone fonnations or karst conditions. Describe measures to avoid or
I minimize environmental problems due to any of these hazards.
No sinkholes, limestone fonnations or karst conditions exist in the project area.
I b. Describe the soils on the site, giving NRCS (SCS) classifications, ifknown. Discuss soil
I granularity and potential for groundwater contamination from wastes or chemicals spread or spilled
onto the soils. Discuss any mitigation measures to prevent such contamination.
According to the Scott County Soil Survey (Cummins, et al. 1954) soils within the construction
I limits ofthe project (1 DO-foot corridor centered on the channel) consist of the following:
. Alluvial land (Ab)
. Dune land (Dg)
I . Estherville loam and sandy loam (EaB2, EaC2)
. Glencoe silty clay loam (Ga)
. Hayden (HaB, HaC, HaC2, HaD2,HaE2, HbD2, HbE2, HcE3)
I . Hubbard loamy fine sand (HdA, HdB)
I ?'"
-~
I
. Isanti fme sandy loam (Ia) I
. Lester silt loam (LcC, LcC2)
. Marsh (Ma) I
. Peat and muck(PaB)
. Steep land, Hayden-Lester (Sb)
. Terrace escarpments (Ta) I
. Terril silt loam (TcB, Tce)
. Waukegan silt loam (WaA)
. Webster-Glencoe silty clay loam (Wb) I
. Zimmerman fine sand (ZaA, ZaB, ZaB2, ZaC2)
Segments 4 through 8 of the channel are located in an area of high groundwater susceptibility; I
Segment 3 is in an area of moderate susceptibility. This proposed project does not present an
increased risk to groundwater because it does not represent a change in land use and will not
involve deepening the channel, merely restoring it to its original depth and re-sloping the banks. In I
addition, the project does not involve any chemical storage or spreading other than construction
equipment fueling and the use of a biological root stimulator to aid in plant establishment. Care
will be taken in locating staging/refueling sites and carefully handling equipment fuel to avoid any I
spills. The root stimulator will not be stored on site, and does not represent a threatto groundwater
as it will be applied by dipping the plants prior to installat~on, not by broadcast application, and
therefore the quantity used will be very controlled and equal only to what theplarit can use. No I
fertilizer will be applied to the plantings.
20. Solid wastes, hazardous wastes, storage tanks
a. Describe types, amounts and compositions of solid or hazardous wastes, including solid animal I
manure, sludge and ash, produced during construction and operation. Identify method and location of
disposal. For projects generating municipal solid waste, indicate ifthere is a source separation plan;
describe how the project will be modified for recycling. If hazardous waste' is generated, indicate if I
there is a hazardous waste minimization plan and routine hazardous waste reduction assessments.
No waste generated by the proposed project. I
b. Identify any toxic or hazardous materials to be used or present at the site and identify measures to
be used to prevent them from contaminating groundwater. If the use of toxic or hazardous materials I
will lead to a regulated waste, discharge or emission, discuss any alternatives considered to minimize
or eliminate the waste, discharge or emission.
No toxic or hazardous materials will be used at the site other than vehicle fuel. Fuel will be brought I
into the construction site by tank approximately once per day during construction. Construction
documents will contain provisions for the use, and storage of fuel at the construction site. In I
particular, construction documents will identify a staging area outside of wetlands and drainage
ways leading to the channel, and will specify that all onsite fueling must be completed in the
staging area.
c. Indicate the number, location, size and use of any above or below ground tanks to store petroleum I
products or other materials, except water. Describe any emergency response containment plans.
Fuel will be brought into the construction site by tank approximately once per day during I
construction. Construction documents will contain provisions for the use, and storage of fuel at the
construction site. In particular, construction documents will identify a staging area outside of I
24 I
I
I wetlands and drainage ways leading to the channel, and will specify that all onsite fueling must be
completed in the staging area.
I 21. Traffic. Parking spaces added O.
Existing spaces (if project involves expansion) N/A.
I Estimated total average daily traffic generated see table below
Estimated maximum peak hour traffic generated (if known) and time of occurrence N/ A.
Provide an estimate of the impact on traffic congestion on affected roads and describe any traffic
I improvements necessary. If the project iswithin the Twin Cities metropolitan area, discuss its impact
on the regional transportation system.
I No impact on traffic congestion is anticipated. During construction of each segment ofthe channel,
the types of equipment that are anticipated to be transported and operated on site are dump trucks,
backhoes, scrapers, and employee vehicles. The staged nature of the project means that the number
I of construction vehicles/equipment will be minimized. Once construction starts, equipment will
remain on-site for the project, except for dump-truck trips necessary for off-site soil disposal.
Table 7 below presents the estimated number of truck trips anticipated for each segment based on
I the amount of excavation needed. It is not expected that these truck trips will have an impact on
traffic congestion, as the project will be staged over several years (further reducing the truck trips in.
anyone year) and most trips will occur during off-peak, daytime hours.
I Table 7. Anticipated truck trips for off-site soil disposal.
Channel Segment Estimated Number of Truck Trips
(Based on Construction Activities)
I 1 45
2 336
3 85
I 4 35
5 50
6 25
7 670
I 8 90
Total 1336
I 22. Vehicle-related air emissions. Estimate the effect of the project's traffic generation on air quality,
including carbon monoxide levels. Discuss the effect of traffic improvements or other mitigation
I measures on air quality impacts. Note: If the project involves 500 or more parking spaces, consult
EA W Guidelines about whether a detailed air quality analysis is needed.
I No impact on air emissions is anticipated due to the temporary and staged nature of the construction
activity, the fact that the project does not change traffic, and the relatively small number of vehicles
involved.
I 23. Stationary source air emissions. Describe the type, sources, quantities and compositions of any
emissions from stationary sources of air emissions such as boilers, exhaust stacks or fugitive dust
I sources. Include any hazardous air pollutants (consult EAW Guidelines for a listing) and any
greenhouse gases (such as carbon dioxide, methane, nitrous oxide) and ozone-depleting chemicals
(chloro-fluorocarbons, hydrofluorocarbons, perfluorocarbons or sulfur hexafluoride). Also describe
I any proposed pollution prevention techniques and proposed air pollution control devices. Describe the
impacts on air quality.
I ?-
-)
I
I
N/ A. No stationary sources are created by the project.
24. Odors, noise and dust. Will the project generate odors, noise or dust during construction or during I
operation? _X_Yes _No
If yes, describe sources, characteristics, duration, quantities or intensity and any proposed measures to I
mitigate adverse impacts. Also identify locations of nearby sensitive receptors and estimate impacts
on them. Discuss potential impacts on human health or quality of life. (Note: fugitive dust generated
by operations may be discussed at item 23 instead of here.) I
Noise will be created by the construction equipment. However, no significant impact is anticipated
because of the low density of nearby housing along the channel, the small number of vehicles I
involved in each stage of construction (i.e. for each segment of channel), and the adherence to local
restrictions regarding hours of operation. In addition, the machinery used in construction will have
adequate muffler systems to further reduce potential adverse impacts. I
The channel construction activities will generate localized dust from earth-moving equipment. Due
to the low density of houses surrounding the channel and the ability to complete at least some of the
channel construction at the same time as the development of parcels adjacent to the channel, the . I
dust associated with construction activities'will not have a significant impact on the surrounding
area. Dust generated during c9nstruction will also be minimized due to winter construction
followed by soil stabilization ihthespring. I
25. Nearby resources~ Are any of the following resources on or in proximity to the site?
Archaeological, historical or architectural resources? _Yes _X_No I
Prime or unique farmlands or land within an agricultural preserve? ' _Yes _X yo
Designated parks, recreation areas or trails? _X_Yes _No
Scenic views and vistas? Yes X No I
- --
Other unique resources? _Yes _X_No
If yes, describe the resource and identify any project-related impacts on the resource. Describe any
measures to minimize or avoid adverse impacts.
The State Historic Preservation Office (see Exhibit 15)did not find any properties on the National I
or State Registers of Historic Places or known or suspected archaeological properties in the area
that will be affected by this project. I
Portions ofthe outlet channel project are located along areas designated for future parks, trails or
greenways. The PLSL WD has worked with interested parties during the project planning phase to I
ensure that the proposed project is compatible with future plans for parks and trails. This proposed
project is fully compatible with all three uses, in that itenhances the environmental and aesthetic
qualities of the outlet channel. The PLSLWD has been very supportive of the potential designation I
of the outlet channel corridor as a greenway, and is involved in the planning process for the
development of parks adjacent to the channel, such as the Quarry Lake site in Shakopee. The
PLSL WD will continue to work with interested parties during final design and construction of the I
project to address items such as channel crossings for trails and access to adjacent parks or
greenways.
Segment 8 is located in the Minnesota Valley National Wildlife Refuge. Conceptual plans for this I
segment include very little disturbance of the channel and involve mostly management of the
vegetation. The concept also includes changing the easemen,ts in this segment to be self- I
26 I
I
I monumenting so thatthe channel can migrate naturally. Preliminary conversations with
I representativesofthe Wildlife Refuge have shown that these concepts are acceptable.
26. Visual impacts. Will the project create adverse visual impacts during construction or operation? Such
as glare from intense lights, lights visible in wilderness areas and large visible plumes from cooling
I towers or exhaust stacks? Yes _X.::..No
If yes, explain.
I 27. Compatibility with plans and land use regulations. Is the project subject to an adopted local
comprehensive plan, land use plan or regulation, or other applicable 'land use, water, or resource
management plan of a local, regional, state or federal agency?
I _X_Yes _No. If yes, describe the plan, discuss its compatibility with the project and explain how
any conflicts will be resolved. If no, explain.
I Construction of the project is specifically called for in the approved Water Resources Management
Plan of the PLSL WD and there is no incompatibility. The project is also compatible with the plan
of the Lower Minnesota River Watershed District (LMRWD), in that the PLSLWD worked hard
I during the project planning process to get the input of the LMRWD on the Conceptual Plan for the
outlet system and to respond to any concerns of that watershed district.
The project is also subject to the Comprehensive Plans of both the City of Prior Lake and the City
I of Shakopee, and the proposed activities are consistent with the plan. In fact, completion of the
project is an important component of the overall storm-water management system that is necessary
for the implementation of the Prior Lake and Shakopee Comprehensive Plans,
I 28. Impact on infrastructure and public services. Will new or expanded utilities, roads, other
infrastructure or public services be required to serve the project? _Yes _X _No. If yes, describe the
I new or additional infrastructure or services needed. (Note: any infrastructure that is a connected
action with respect to the project must be assessed in the EA W; seeEAW GuidelinesJor details.)
I 29. Cumulative impacts. Minnesota Rule part 4410.1700, subpart 7, item B requires that the RGU
consider the "cumulative potential effects of related or anticipated future projects" when determining
the need for an environmental impact statement. Identify any past, present or reasonably foreseeable
I future projects that may interact with the project described in this EA W in such a way as to cause
cumulative impacts. Describe the nature of the cumulative impacts and summarize any other available
information relevant to determining whether there is potential for significant environmental effects
due to cumulative impacts (or discuss each cumulative impact under appropriate item(s) elsewhere
I on thisform).
As suggested earlierin this EA W, potential cumulative impacts from this project are associated
I with the additional runoff that could result from future development in the watershed. In
developing the Prior Lake Outlet Channel and Lake Volume Management Study, the PLSL WD
developed a calibrated hydrologic model using the XP-SWMM software and used that calibrated
I model to examine the effect of future land use on Prior Lake water levels. Future land use
conditions of the lake watershed were determined based on the Comprehensive Plans for Scott
County, Prior Lake and Savage (see Exhibit 8). The major change from exiting to future conditions
I was the conversion of open space and agriculture to low-density and high density residential. The
existing and future land, use were then used as inputs to the calibrated model to determine the
existing and future runoff volumes based on actual rainfall from 1998 to 2001. Table 8 summarizes
I the results ofthat modeling effort.
I 27
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Table 8. Existing and Future watershed runoff volumes, from XP-SWMM modeling results. I
, Existing Runoff Future RunoffVolume* Difference I
VoluDle(acre-feet) (acre-feet)
Year
1998 19,700 23,900 4,200
1999 19,400 23,000 3,600 I
2000 10,800 12,900 2,100
2001 17,300 20,600 3,300
*Assumes no stonnwater management and Urban Reserve areas shown in the Scott County Compo Plan I
update develop entirely as high density residential (approx. 4 units/acre).
As Table 8 shows, depending on the annual rainfall amount the additional runoff could range from I
2,100 to 4,200 acre-feet. Note that this assumes no storm-water management and high density
residential development in the Urban Reserve area. Much, if not all, of this additional runoff
volume would ultimately flow through the Prior Lake outlet. Potential downstream impacts include I
water level fluctuations and additional nutrient loading to downstream lakes. However, as
discussed under Item 17: Water Quality, additional outflows from Prior Lake could improve water
quality of downstream lakes by diluting the higher nutrient concentrations found in those more
nutrient-rich lakes. ,I
The PLSLWD is concerned about the future impact of this added runoff volume on Prior Lake
levels and on the potential for downstream impacts. Therefore, two of the five volume I
management strategies identified in the 2003 Prior Lake Outlet Channel and Lake Volume
Management Study focused on reducing future runoff volumes: Strategy 2: Rules, and Strategy 3:
Land Management. The intent of these two strategies is to reduce the future runoff volumes by I
1,500 to 3,000 acre-feet of water or more to reduce the potential cumulative effects of increased
runoff from development. The PLSL WD is actively implementing these two strategies.
In addition to these two strategies, the implementation of NPDES Phase II requirements in the I
PLSL WD, cities of Prior Lake and Savage, the Shakopee Mdewakanton Sioux Community and
Scott County will also reduce the potential for future cumulative impacts by improving the quality
of runoff in the watershed. The PLSLWD's rules pertaining to new and re-development also have I
strong water quality requirements. Finally, thePLSLWD and other partners are working to
improve the quality of Spring and Upper Prior Lakes, which will in turn protect the good quality of
Lower Prior Lake and help avoid any future downstream water-quality impacts from the outlet I
system.
The subwatersheds directly tributary to the outlet channel (i.e. downstream of Prior Lake) will also I
experience significant development during the next 20 years, as evidenced in the approved
Comprehensive Plans for the cities of Prior Lake and Shakopee, and the development plans of the
Shakopee Mdewakanton Sioux Community. This development also has the potential for I
cumulative impacts to the outlet channel and downstream waters. The PLSL WD and project
partners have taken additional steps to avoid these future impacts. The City of Prior Lake has
agreed to limit future discharges to the channel downstream of Prior Lake to existing discharge I
rates. The City of Shakopee has already completed an EA W for potential future flows t.o the
channel from new developments to the west, and that EA W found no significant environmental
impacts from those expected developments. In addition, Shakopee is exploring infiltration and I
other options for retaining water on-site as much as possible at new developments rather than
sending it to the channel. The Shakopee Mdewakanton Sioux Community has also stated its intent
to manage storm water from its developments on site,
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28 I
I
I In addition to these efforts to reduce any potential increased storm water runoff from new
development tributary to the channel, the Cities of Prior Lake and , Shakopee, the Shakopee
I Mdewakanton Sioux Community and the PLSL WD are also implementing the NPDES Phase II
requirements and have developed Storm Water PolIution Prevention Programs that include
construction and post-construction storm-water management best management practices. These
I efforts will improve the quality of storm water runoff within these communities, further reducing or
mitigating any cumulative environmental impacts from new development. In addition, local
controls are in place for addressing runoff rate, quality and (in some cases) volume from new/re-
I development, and potential wetland impacts, as well. The PLSL WD rules are more stringent than
the State of Minnesota's NPDES General Permit for Construction Activities. In addition to most of
the items in the NPDES permit, the PLSL WD rules require infiltration/retention of Y2 inch of runoff
I from all newly created impervious surfaces and buffers around wetlands, watercourses, and pubic
waters wetlands (which would include the outlet channel). In addition, the PLSLWD has
developed a performance-based system for managing peak storm-water flows directly tributary to
I the outlet channel. The PLSLWD is also planning to complete a water quality study of Pike Lake
in the next couple years to determine the sources of nutrients to the lake and develop a plan for
improving water quality. The District has also indicated its willingness to contribute to a similar
study of Dean Lake.
I Finally, the planned extension ofCSAH 21 to the north could send additional runoff volume to the
outlet channel, which.is justto the east of much of the planned roadway alignment. The road would
I also cross the channel at a point just east of Dean Lake. Efforts are underway, as part of the
developmentofanEmdronmentalImpact Statement (EIS) by Scott County, to identify
opportunities for regional ponding, wetland mitigation and enhancement, and infiltration to
I minimize .and mitigate any impacts of this road extension on the outlet channel and other
downstream water resources.
I 30. Other potential environmental impacts. If the project may cause any adverse environmental
impacts not addressed by items 1 to 28, identify and discuss them here, along with any proposed
mitigation.
I 31. Summary of issues. Do not complete this,section if the EA W is being done for EIS scoping; instead,
address relevant issues in the draft ScopingDecision document, which must accompany the EA w:
List any impacts and issues identified above that may require further investigation before the project
I is begun. Discuss any altemativesor mitigative measures that have been or may be considered for
these impacts and issues, including those that have been or may be ordered as permit conditions.
I Further investigation of potential wetland impacts will be necessary prior to the commencement of
construction of any phase of this project. The PLSL WD is in the process of obtaining wetland
delineations of the channel and adjacent/intersecting wetlands, and any wetland impacts will be
I considered and addressed during the permitting process. Any impacts are anticipated to be
minimal. If there are impacts that are unavoidable, they will be mitigated through wetland creation
or enhancement within the Prior Lake watershed.
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I 29
I
RGU CERTIFICATION. The Environmental Quality Board will only accept SIGNED Environmental I
Assessment Worksheets for public notice in the EQB Monitor.
I hereby certify that: I
. The information contained in this document is accurate and complete to the best of my
knowledge. ,
., The EA W describes the complete projed;lhere are no other projects, stages or components I
other than those described in this document, which are related to the project as connected
actions or phased actions, as defined at Minnesota Rules, parts 4410.0200, subparts 9b and 60,
respectively. I
. Copies of this EA Ware being sent to the entire EQB distribution list.
Signature . ~ ~ . Date '7- - 2(, -0'-/ I
Title AlI1iI ;vj),#-kr-
Environmental Assessment Worksheet was prepared by the staff of the Environmental Quality Board at I
Minnesota Planning. For additional information, worksheets or for EA W Guidelines,' contact: I
Environmental Quality Board, 658 Cedar 81.,81. Paul, MN 55155, 651-296-8253, or
www.mllplan.state.mn.us
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I Exhibits 1-3:
I Project Location Maps
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n_ - - - '- -- - - -.--- ------- ,~_.--. .----. - ---- .---- - - --- - - -~ - -,
- - - - - - - - - - - - - - - - - - -
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,I. 0 ~ Legend
A/ Id
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\ ----- Prior Lake Outlet Channel
i ,
\ I _ D Project Area
.
Public Waters
\ ~ Prior Lake-Spring Lake WD
~ ,
------- Municipal Boundaries
Roads
lP, . C>
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-----
, . . Watershed District
---
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-::J::;~~"::_~:';:~~~~;.~'~~.'~:":':;" J_?-~P~_~':~l ~'~<'.:-:'~. .~"(<:~ .~- "?f~~;'
(I ''t.~::'~.$f~ ,"~Si~, ,>' ""r":".,, " I. '. .,". .~, Legend
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II
i I through Dean Lake, Pike Lake or Jeffers~l;-';:~'"h""', '~, '. '''\ '1,~""",,"_L':"~ R"'~'J."",
Ponds, The channel line and project location T];;'X:'::;~i';:I, ,:..2;:s" " ;.r"'~;,~", " B;,,:I.~~~~~;iJ-'n'\14',.,:-:;;<
I bo u nd aries th rou g h these water bod ies a re';;: i;~~,"'.:~:~, :/:.~i::~:?i;:~~:t': _: . ,':;:"..,.':.:~.:,-:"~:~\:> ~'::~r:/~L,:';
I only provided for stationing purposes ' "' ,,",:, ",',:'. ',i< 15n~':'J':'"-",, "","" -",-,-~;", i~.:,'.>j'.'':
i , -'_~~3 ,- ~,~-;_ ~ ,_J . - ':i~:' ~~~ '~;: '"~--r_-~' _ -'::',iO>f:(;tT/~' " ~\:c1.~J: ,~-'~'~i,;~: ~~:}:;,": '", ".:~t:~;~~';:;;::
II ' '1~"' , ,"'" --" -' · ,. --' - -,."'" -,.
,I
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I Project boundaries are 50' ,-:- _' , . :,>.-, ":' ',t ';:'?}-\?;~:'::';'~;:t'~;(:::"!_-,c "
. . ,- . ;~- -~-".~:.-~_:~'-;_"':"'.r;';:.;..~i~~[,--<~:t:-Jif:;:::d:-"~.'
lion either side of the outlet channel "I' .... 'T~~,,"'t,,~:,,")rrif,:\,*"';,
(" e 100' 'd t d : I '~I--: .t'.;.;tf.,<~~~:;!~~~K;:.~:':~.--'~,~~('i~~t~jf
l L ,a corn or cen ere on ,_ __ _ _, _ ,L.t~-.w"",.,;'i~~-'L"",:,'-;;L, "rr~-,! :il'';,''f,''.'
th h I) .~. ~- ...... ~:-:'I'I\n . <1~":~:~""~~'::~"~'1"{f~:f;:.fv1\Y:\'~1m~...~~..~~;"'t..,.~~.;.;~,;::-
e c anne I ,,',- ,-" - "'-'4:& ,".:' ,-'~ ,-;,1'". ""~ " . ",", '," ' ,~~,
: :i~~~\~iii~~fzi~r~~~~!~~:~li~~~ll,f:li~ii,
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;p Exhibit 2
I I ~., Prior Lake-Spring Lake +
+ Watershed District
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--~- .~-~ -~-'-----'-'""~~--------~-----'-~~- ~
II Prior Lake Outlet and Channel Improvement Project
General Site Plan
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a . g '5'
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---~ 0
--.."""
D "'~
I tf'
Note that there is no defined channel I er----,G:;'
CJ -[7 ~ ' "g
through Dean Lake, Pike Lake or Jeffers I I
I Ponds, The channel centerline through ~ ''j;:, ~ .;,0.. ~
" 0 ~
these water bodies is only provided for ~. J, c:),.:; i) t1) ..
stationing purposes. 'v. Cl __f\
,-- r-I'1 (1 " !) ~
"" C> ucJ,_~\~ 8
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II I I Prior lake Outlet C'ha~
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Legend ~ 03 _ Q
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---- Channel centerline ,-'- 0 (/
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;*",,*1&1' Public Waters ~
I (J Q .
- Streams
,I o NWI Wetlands
I frgl Scott Co, wetland inventory
:1 r'-'-:
i _ , _! PLSL WD Boundary .
----- Municipal Boundary
D Project Area (1 DO' corridor) N
.I~ 0 1,400 2,800 5,600 Feet +
! k I I I I I J I I I
~/. Prior Lake-Spring Lake Exhibit 3
II ,r. Watershed District
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Exhibit 4:
I Outlet Operating Plan
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I PRIOR LA1KE-SPRING LAKE
.' . WATERSHED DISTRICT
· OUTLET CONTROL STRUCTURE'
I ". FOR."
I'. ..' ..... .PRIOR.LAKE
I. .,.., ' '
. . . . . .. .
. . ',' . ,
.. , . . ..
. . . . . . ". . . . .
. '. ., ....
. .. ." MANAGEf\I1E~T POUCY.< ..'
,,' ." ", " . . " 'AND,'" " " ." '. "
.':</>;::', ..OPEFlAim.JG, PRoceDURES ....... ',". .'.
I'"..' ',,,,. ,,,,' , " ': '. . .: '....,-: "":,-,,.:,,:':..'-":,...,::. ' ".'
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I' , Exhibit 4
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'" ,JUNE, 1987
I
I E.A. HICKO'K AND ASSOCIATES
, 545 IINDIAN'MOUND
I ,wAVZ)\TA, MN 55391
I
,
LAKE OUTLET CONTROL,STRUCTURE' I
,MANAGEMENT POLICY AND 'OPERATING PROCEDURES
. I
I NTRODUCTI ON
" . "
The purpose'of this docunient"is'to st'ate'the goals, po'licies" and operating., I
proc~duresthat ~overn th~ us~ of the Prior Lake'Outlet Structur~.
.' The Out 1 et Str~cture is des; gned to a 11 ow exc~s~ .water to be dra i oed ofUr i or ..,1
'.' '.' ...l ake du ri ng t; me s ofh i g h lake J eve ls ; 90"d~~ t~ll1i n i m; z e the e ffe,ts~n.,\,' - I
:";:.-,;:",":'~<'s'tructures:ar'ound Prib~:La'ke: " ,'. ,...,'" " """:,',,, ',"" :,:", ',' .....
. ..... "':' <>, . "'. ". ....', '..... .:><'<" ..', . . ..... .",. '.1
~": .',' .' "The' 'olit.l ef,:has,:'-been'~us"ed ' to. d'; scharge. .ex'cess':'water,frCiin Priortake:'s ;nc~ '. ; t "
,:,' " ". <',' Excess': wate:r, di scharged :fr.~~,"'p.ti'or. L:a~e'~'tr~'ve l's,"'-th~Q~:gh':':~'ne~h'~'j'f""'m.:i l~""',~'f.': 3:6':.:; nCh ;.:<':.::
, '
: , ,,'I....:)h~,origina'L lake ,out1et"operat;(m' plan',.outlined~ four guidelines)o'foliow with
.' . - 'reg ar dto Jake out 1 etopera ti on. The f 0 110':'; ng'j~a1; s t o(theg~i deHn~s ,.
, .,........ " . ',' e<cerP tedfr~m . t~~t;p""ocedU~<,> .:". . . _ ";;'. .... .........'. "j "~,I
f, " E xces sr~~of ff rom theD; shi ct . sha 11; wh,en"ver' andwhereve( pr~cti ca 1. be.. . I
retained or detaine~ in storageupst~eam,froinP~io~Lake ~s opposedto'being
'. . .... ..". .... . ..
allowed tof16w to ,th~']ake and t6 the~utlet~ I
2', The Distri ct intends to fully comp 1,Y with a l':of the prov is iO,ns of the Jo i nt I
powers Agreements.
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3. The establishing of hard and fast "release or no release" conditions and
I elevations for opening and c:losin9 the outlet will limit the necessary
flexibility requi.red for proper water resource management and should be
I decided in favor of c,10se1y monitoring conditions and reacting ,rationally to
I those conditions, predicted probable conditions, 'and pred'i:termined
calculations which inditate,probable results of contempl~ted actions.
I, 4. A t any time the 1 ake' 1 eve 1 reaches 903:~ 5.,' the' out 1 et wi 11' be' opened ,and
I, suffi'cient' water' releas~d" to~ll'ow for 'the'r'uhofffro!Tl 10 ye~r':one hour
" ' , 'storm~: ' " : ','" '".': , '
I' "
.. . .
, ' ThiS Managem'e'~t Policy ;and,'-Op,eratirig, Procedure" t'hough not':"a,dopti"ng these
I " ,. : Ii i ~e 1 in es?etH i c.~il ~ ,haSb:enwri t t en ,t 0 i nc orp 0 r atet ~~~ ~'g :,e at es t~~te n~ ,.',
,fhes'e' gu'; de1 ines in' a: form'a t' 'that "i,:S' comp'a'ti bJe "tq" the' ChaJ:)ter'i 509'''Strirmyia~er J,;' ,','
I, ,R:~~~ffa~d ~ater'Q'ual;tY:::M~'na~emeri,t p~a'n Phi,i~sO~hY arid"~'cc~'Pta~';~':'io t~~""""
." . ,'. .', .' ... ....... ." . " . ,.' . :',. ,','.
. ~ . .
I ' ' \tari 6'us agenc:i es ; nvol v:e,d., ", ,',','
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. . SECTION I '. MANAGEMENT GOALS I
The ,Management Goals are the desired end to, ~hiCh the District's policies are I
directed. The District has three sp~cific goals to guide management of the
out 1 et 'stl"uctul"e.: . 'I
The three goals are: II
1. To .reducefl?od.ing.'on,the ,lak~ and di,Scharge'channel to t-he,greates~: '
pradical extent. · .' . . . I
2. '. To e.nhancer'"creation, . w; 1 d ,and aqua t; c . life s or.v; va 1. and aeithet; c.when .... I
'. '.'" . feas i b le ,and.: ~,,~,n~ i,s.t,~nt wi.~.h the 'o~erat; n,9 pol 'i cy,.~' '. '. ,.:: ,':. .,..'." __. ", .."
" , ,',' ;.' ;, ':',,' ',,'" '". , ' '.'" ,,:,':, \', ',,' '" ,'" ':'1'
, :' :",., , "..,' ' '.', ,:< "",, " i-";, ,:. ", ."". :;"'.", '
.. " . . . ';',"
. ...... .....q '.. .... ..... .'. ..... ......... ................ v..,,, . .':'...
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SECTION II - MANAGEMENT POLICY
E The Manag,ement Policies are a means to achieving an established goal. They
II are listed according to the goal they' are designed to help achieve.
E ' , .. Flood Reduct i on Goa 1
", 1.' The District- will temporarily increase discharge, rates within the guidelines,.
I . of the Opera t i ng Procedure in order to accommodate predi ctab 1 e vol umes of runoff,
.' '
I 2. The O'~strict,will c~ntrol the discharge'to a rate not: to exceed the maximum.
. capaclty'of',the ~raln:age'channe1-.:. .. ' ""
I' . 3.' The Distr,ict will:'reqtin'e~'Il upstream stormwater conveyance's-ystemsbe
I' '. . de$i gned, to ensure f1 ood prot~cti on for down$tream recei V,i ng waters ..,:, ..
1 ..4.~he .Pistr~ct will . ~equjre the optimumu$e of w~tlan~$;'ietentiOri:~ondsa~d,>
.'., ' " :':" ,', ;, 1 nfll trat 1 o,n techn 1 que~..- for, ~he :tempora,ry, storage of: S tormw.~ ter' runoff.", .,,' ';,'
I' :. ... .'" . ':i:> The ~i'~tr i~t will ~o?peratewi~h at:er i~volve~ ~~enc i e$ tomanag e;' .....'.........:
, '
,." . . . . ....
1 .'..... ".ge~el opment ba$ed o~ the ;lO~yea r'n ODd .1 evel J or a 11'bod ieso,f Water; .,...
I... ". En~anceme~ t o~ Re~~ea tion; Wi! dand Aqua t i~Lif e s~rv i val and Ae: thet i C$ ~oa 1
. 1. : The Dlstrlct':W1n 'ma~age the water, level:, on Pnor. Lake betw~en elevatl,on' ,',.
. . . . . . . . . .' . . .
I 902.5'~nd:904..6to,the:,greates6'pr.acti~'~1:e~t'erit.."" -::: "':':":,,":. '"
1 2. ,The Oi $ tr i tt will, requ ire era $ ion con trol mea$ ure$ to be j mpl emen ted to
, tmpfoveand pfotect the appearance of shoreline areas.
I,. '3.. TheO;strictwill discou'rage the use of lake beds and beds of waterbodies
I for the placement of roads; l, i ghways t' util,it i es ,and other non-water rel a'ted
activities.
I
4. The District will encourage the wise use of shorelands and other sensitive
I areas (e.g~, steep s19pes)' in the Watershed District.
1-4~
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. Improvement of 'Cendi t i ens Goal '1
L The District 'will apply a rnu1ti;.use,'approach to consider the benefits ,and I
detri~ents to not only the.water resources but il~o on'~ild and aquatic '
l;.fe7recreation, and aesthetics., ,I
2. The Di'strict will'seek op'p'ort,unitie,s to, develop or irnprov~ wild and aquatic
..... 11 f e.re~r e ~t i on ~n d.e5the tics. in co "jun cti 0 ow it~Dj5i: r iet p roj eCts .: I
. . ",' '... .. .' . .:::' '; "'. . . ':.' .
.. .3. "The:DiStrict. willwork'to irnpT".ov'e' outf~t:~~annelconditiOris. bY"sta:b:i'ifz:(ng..;'1
.. . :: .." ,.'.' . . .: " . .
..' dfschar'ges. , " "', .' " ,", .: .1,
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SECTION III - OPERATING PROCEDURE
I The Outlet Operating Procedure :tablishes the limits within which discharges
II may occur. The procedure establishe~ discharge zones that are described as a
function of lake level. A, range of, discharges is defined for each zone because
I, '~f the numerous considerations which must be taken into account'd'~-ring the
operation.of the' outlet. The discharge zones are based on sound hydrologic
I pri'nciples and are designed to achieve the Management Goals and Policies. The
I,' attached exhibits shows the discharge 'zones and their allowab,1e discharge rates.
,. These zones' are, des,cr'i bed in' Sect {on' I I I ..A 'be 1 QW.
I' "". The Joint Pdwers Agreements wi th the C it i esof Prior Lakeanif Shakopee s peei fi e~
I : ',:,:. ,'de'rtain a~tio~s to ~e taken befClr~"relea,s,in:g',;an,~:"w'~~~rthr~~:gti ,the, Lake"OU.~l,~t'~ ':;,
, ~Priorto re'leasing,'any, wa~er,~ ~')the 'City,:,o'f' 'S'hakopee must be' g'lv,en, 24:'h'our,";'" ""
I'" :~~t ice i,ri. writing of i nte'nt: '~to ~;p'en ~h,e"L:ake Out,l ~t ga~e; , 2)' th~ d~a'i n Qge' ,
. ....,' .-
I" eharin~ rmU~~be, i ~ S p e~~ed tOi~~ ure (ree fl0WPf~ "" t~r.a:~ d3 ), th~av a i lahle., . . '. . .,
'-.:," "",' I" ',cap aClty, of. the, dl scharg,e:, cnallne:l ,must,' ,be determl ned,., """,' ',:' ',' , '" ,"',
I' .... .......... ,i, 61 SCHAR GE' S~TTI~GS AND, AD JUSr~E NT S:c' ,...l '.' ".' '. . .. '. "". .... ...... '. .
I,The '~i,SCharge sett ings arid' a,d!U~ tment~ are' descr i be~ ~ 'as ~ones 0,( ,contro ;,- 'i,n the,,:"--,: --;'
following ~aragraphs.
, '
I" Zone 1 ~ Maximum ,Drainage,: Channel Capacity .
I At the lak~' elevafion of 904.0, structures around the lakeb~giri toe~per;ence:, '
damage due to flooding. ,To ~ffectively'respond to potential, flooding, ,it is'
I . necessary 'to be able to begin, discharge',st'arting'at lake el~vation 903.5~:For .
, ' ,
this situation, the maximum allowable rate shall ,be the available capacity in
I the drainage channel. The Joint Powers Agreement defines the available capacity
I ' as lithe calculated maximum rate of discharge at which the Lake Outlet can be
allowed to.operate without resultant damage to the drainage channel or to
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I
adjoining properties,' The calculated maximum rate of discharge. shall be I
determined'by usi'ng Manningls'equation for open-channel flow', All calculations
. sha 11 be perfcnned by. the Wa tershed Oi stri c t' 's engineer and shan be eonf i rmedl
o . .. .' .
." . by the engi "eers of Pri or lake' and. Shak opee ~' T'he Regional Offi ee. of' the.1
~i-"~eso,ta Departme,nt o~ N.a,tliral Resources (DNR) shall also' be informed of the
contempl atedacticns; . -.1
. .' .
... . ..' One e a val 1 a~ ie ~ a paei t~ha ~ be e ~~e~: rmifed; t~~)~.1 n age cha,; ne 1 i nsp~cte,dt~ "~I
,,":,,:, ,,;"', insure free {low,' :and,,24~hourrioti,ce'grveD,to;:Shakop'eet the Lake,Outlet'inay'be"
'" ,':,' ,:"ti~e 'of ttiE{year~' elevati'on :,of' p'rior' Lake;:,,':ui)str,eam~'rese~ves:t~j:ne.::avai'1able,,:--.,' ,,-,-,:,,
'. . . '.' . ". . - . ~~ p ~~ ;;,AJ ~cis i~~O~Wh eth er to d is e h ~rge ~;ll be b:S e~,~r,;~:~-i f o~ '~he "I.
....: ., ,po tent fa 1 fo rf l.o~d in;. tooec Ul", :1 f, a ,~~iail~d \nali,si s . d~t~~mine~ t~at:J,,:".'
':" ': ,',<' ffoodi n9' J:i1ay oC,cu'r, 'the'n:.'a', ,~~ scha rgt rate;', wi, 11" ,be' dete.rmi ned',i ii order '.to,', ": ': '':: '
.,' ..,'. . .,.. ~ll;~via te~xre "o~ed ~l~od i n~ : ,orice . it he s~~e n d~C i ded to, . ou t let' W a t~C" th~ '..,. il
, ': eft; eS:6f. pri o'r' LaKe and '" Shakopee 'mus't '.be g; ven '24-hour not; c'e, and' ,theHoutlet ,,..: "
, elranne 1 mu stb~i~s;ecte~:' '. . '.. ,- i"> . ,. . .... '.
.1
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m ' ' ,
m Zone 3
During March and April, di~charge will be allowed above elevation 902.0, with'
m the approval of the DNR Regional Office, based on an analysis of expected lake
. '. .
E 1 eve 1 i ncr'ease due, to snowme 1t9n~Lupstream reserves, Allowable discharges
wi ~h in th is zone rang'e from zero to 20 cfs.
I' , Zone 4 - No'Discharqe
I,' ' Un 1 ess approve~ by the, DNR, d icharges wj11 not be allowed, when the lake; s be low
, '
e~evation 902,.5 except during ,March' and :April'when ,discharges w-ill no't, be":",
"
, , ,
I.. ': '::" allowed,:belovtelevation '902.,0,: "
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8. DATA COLLECTION AND DISCHARGE ADJUSTMENT. PROC~DURES : 'I
Field d~ta shall be collected and ~ischarge'adjustments at the Lake Outlet
Con tro 1 Structure sha 11 be perfor"med. ; n accordance. with thi s see ti on to' imp 1 ~mentl
".- the poli~y"identified,in 'Sectiol1 I.'Management Policy. ,:1
B.I0utlet Channel Oischarge,Data
.. . .. Dud ng the f.i rst y~ars o( 'oper ad on. f~~qu.;n't mea suremen ts of outi e t channe 1 ..1.
. · '.. .: .....di scM~gew! 11. a 11o~the Man~ gers t~ pr~pe~ ~yadjUS tthe i a.ke . o~tlet co~tro 1 ....... .. '1
. . ,'. :', . ;s~rtictiu:~e;,to. aC,hi eve 'the Management. Goal s.:..... Drschargemeasure~'ents ~i1l b,etak.l?n,:-.
..... .... ;.... .......p.... .......0 nf . regU i a rba~ is .a 1 o.g. trye · out l~I . c ha~n~ 1. ; ~t the J ~.11.ow; ~ g: 1 ~c a.ti o.n sdu dbg .........1
:'::""::,': <.-, .the time-,the"la'ke Out"-et,C.on'trol,:St'ructure',is.'in 9peration. ' ,;'" ,. " . '.:'::-: ".:;"
:,' ',' ", " ' , .., , ,:"," ,:",Fl ()WS ,in,tbBuck', ' ',.' .,:' MQ'n:thly (m,i'i{irnum) ,'" I
': ' .', . "Spring; pri or," , du r.i n'g open wate'r'" :',:- .".
" ,u, ,,'and ,Pike Lakes'" ' season,- ',"
B .3 . Ana 1 ys.! s and.: Repor'ti ng of Data . .' .:. ..I.
,TheEngineer.shallanalyzeall.- data, collected on a'regular basis~''-A suinm,ary, ',:,1
of that data shall be ttarismitiecl t6the Managers arid th~ DNRRegiorial .
.. Qffi c.a one e'~ aeh mon th . Sh ou 1 d 'qui ek 1y. e han gi n 9 cond iti on s be ancoun tered · 1
'verbal reports wi'l be transmHtled as' required. I
.c9- 1
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All verbal summary reports shall include a recommendation for adjustment, if
~m any, of the discharge at' the control structur,e along with the time the
II adjustment is to be implemented. The recommendations shall also identify when
the adjustment will be implemented.
U 8.4 Implementation of 'Recommended Action
o :' . Upon, verba 1 approval by a !Ilajor,i ty of th~' Managers, the Engi neer shall implement.,
,t'he recommended disc,harge' adjustmeht as' directed and in accordance with
, ' ,
0.,' . 'Section'IIr'. ' Operating ,Pr'ocedures.'
U," , .- " 8'~5 Frequency,ofOischargeA'djus'tment ..,
,:'Discharge 'adjustment frequency will be limited, to the extent praCtical. More,
m ,',' ,freqUent' adj us tenent maybe required if as ubs tant i a li ncre ase'ar deC,reas e In the' _
. _ ' " '. ,di sCharge r~: e i s ne~ess ar y.I", t~~sm e, the over~ lladM ~ent will,' totM
, extent poss1ble, be ,1mp,lemented':1n l'ncrements'to avo1daorupt water 'level"
. . .. . . . . , ., .'. ....,'
I" , 'fluc t Ii a t iO~ sas ,ar es uHo f d i schar ge adj ustme n tat thecont ro1 structure.
Emergency disc,har,ge adjustments,rnay be implemented under'the"conditions, '
I . spec I f i ed j n P aragrap~s B; 6 or B.7 below,., " ' '
I' ' " B~'6:' Emergency Adjustme~t, , ' ,
'" The E'ngi nee'y."sha,i( h'~ve' tn'e' authc)ritytochang'e' the ,d i scharge between- regul ar'
I ' adjU'~'tments:: wher,e imme'di ate Ch'iinge is' 'ne'cess ar,'Y to:reduce "or'a~O;-d' sign iTi cant ':
" '
I ~isk' toO' acf ety or damage to property whi ch wou 1 d 1 ike ly~esu ltif the change is
not made., ,The Engineer shall promptly communicate all such emergency
I ,adjustments to the, Ma~ag~rs, the Cities of Prior Lake and, Sh~kopee, a~d the DNR.
I If sudden conditions produce h'igh outlet'channel flows and it is feasible to
store water on the lake fo'r 12 to 48 hours, gates will be closed to allow outlet
I channel flows to abate. The Engineer shall develop a monitoring program to
I assist him in promptly reacting to extreme rainfall even~,s.
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8.7 High Water Conditions . I
When high water conditions, are reported ,or. predicted, the Engineer for the
,District shall promptly'investigate the reported or predicted high water conditiol
. .'. .' . .
, "
" -
and determine whet~er adjus.tm~~t, .can be made 1n :t,he d;scharg~ through the, ' :,' I
, ' , control,- structure,~hat would reduce the high water condition. If adjustments can, '
, , , ' '
, :':~e,ma~~ ,that are consistent with the Management Poli~y~ th~ Eng~ne~r'shtl1 I
'p'romptlymake such "adjustments as are appropriate to reduce high wate;r, "',' condition~ asso,onas,'p,Ossible. ',,':,.,,:, "~','",,, ,":'1
..... "/ .. ...."~ .80~e;~ ti ~n ~tll~sPO~slbi1;g . ...... '.. ....... ".," < ..' ,;;,~"". . .."" '. ,i".'
":, ,:' " TheDistri~f:mai",ente~';'fnf({- a 'c'mtrad,with':a:ri'6the'f-':. g6~ernmentaf::ageh:C:f:to-'> ;::': ':;,,;..'
,,: ..' . :.: ;'i pcp'! J~,~ p~ra t i~gpers~nri: 1'" E~iP liyee ~ ~ft h~'con~~ ~~ t,;. 9 a ge~c:'w;r\h~~d;e. '"
.' "'. ..... ,,~~ ~ormai ~ t~~ ~~~e an d r.~P~' ~~':wh~n ceg:; ~ed~rid~i 11 make reg u 1 artd p s td tho I
<:,:~' ~~ :,as' ~ ',rec~E!d,,'by:the,:: o.,stn ct: 1$, Eng, neer.. ::__ ".. ",,__:, ,'., "" ,"
"i'~he'contc~/:tcuc~~::e~ha llbe owa ted 'bY~heD;st~j~i i ~ a~co':danc: :~~ th' the':"
:' ..~". ...~':;',!i~j fat ;~~s. ~~tfo~th {~: ih,~.t~i{ ~~:~;~t{to~:cO\St~u~;tu~eM~nagH'~ntP~liCy.~nd:,
__ '.: . "-/"',< :":, Oper'cit-fng P,r'6c:edures~"M,innesot'a",DNR: 'p'ermi't: No.'j9~6016,/:and, the'.Jo,inLp,Q~ers::":, ".'
.:.' ,',::, ';Dti~'i~g 'th~:'pp~n~ ~iat~r, se"asp.n'~, the, Oi stric't:':s,' En,gine~r: sha 1 r pre?~~e' 'a montI11Y" ",'
. '. . ' ,.. su... ar yo f~ ii:d~ta ree ohM and a ".ary, edb y his offi c~\ ,i ~ t i~ d j n gad5" s t~~;;~ 51
m'ade,inthe discharge ratedur,ingthe',pdo,r month.' TIi1's,summary,shall'b'e
d j s tei buted to the Man age~s.: .'th~ Mi n rie; ot a Department of N atuca I Resou~c~s. the ..
, municipal'itiesof Prior Lake and Shakopee and the Board of CountY'Cornmissioners I
of Scott County and sha 11 be avai 1 ab 1 e to interested persons. .
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SECTION IV - TERMS AND AMENDMENTS TO THE MANAGEMENT POLICY AND OPERATING
II PROCEDURES
1. Term
D This document defines the Management .Policy and Operating Procedures for the
D Lake Ou t1 et Cpntro 1 Structure at PI'; or L ok e for t he period of Janu ary 1, 1987
'and thereafter ~ Any amendments to thi s document shall be made pursuant to
D, Section IV.2'below.
II., . " ' 2.' Rev;.ew"o~ Ma~agement Pol fey and, Operating p~ocedur.es
,:. On or before October, 1, 1989,. the Distt:'ict shall, submit to the'DNRany ,'," " .'., ,
'-', '" '," " ,', " ' " ' " ..", ", ,: ,',
I. . '. . : ame~dme~ts to' the ex i st i ng . Ma~agementPo 1 i c;ailcJ9per a ti n'g . proc~~uresdeem~d> .' '
',necess'ary by, the District,'for:'the three (3') "year: period commerici.n'g,'Jaliuary,l~:', '
I 1990. Atle~st ~hirty (30)days prior to anysubmittaito the ,OUR, theDistri~t
II sha 11 "rovidethe miJn i d pall t i eswith in thewa tersheid a copy oft he prop07 lid
amendments such that 'suffici-ent ,()pportu~~~y to "submit comme~ts:,t~':the DNR i.s "
I '. ....a 11 oi.ec!. ,~i th; n . si ~t y (60 )d~dqfr eeejp t~t~ei DN~.S h .11 ad vis e ilie pistf i~1:>', . .. .
, ':i n " \~r'i t ; ~g ,at'., ,the''-ac~e'Pta~'c'~ '~: .'.r~~i'ect i~on'" ~'o'~ ifi c~t'i:~n' or "aAd it i on:~".'t'oth~~':':':"',":>.~"': >';'
l\roPo.s~L:'., '<'i' <: '. ..... '.' ....
. . . N :.'
. 'Any pubi;c hear; "g that may beheld onproposeda~endments to the Manag~~ent
. , ' ' " Pol icy and Oper,atingProc:ed'ures ,~;,haJl begoY'erned bY ,Minnesota Statules,-105.44.,
I', ,.,:' :. Ifa:hea~i'~g .;s,':he", d~ ~ t'he:e.xi~ti ng. operatfo:~:al:':pr'ocedures::sh~'l'i,' r'e~a:in ,in' f~lI :- . , .
. "-:
. . .' . .
I ....f orce and ef:ectiJnt il a..' fin a1 adm; n; s tra t i ve deci s ioni~ r'~ached.'F~i low i,;'g' >'
'the final ~administratiYehear.ing deCision;,'or if no nearing is he,ld, the,
. . .'
, ' ,
I amendments, if,any, shall' be' incorporated into, th'eforegoing. Man,agement ~?l icy
I an d Opel' a ti n 9 Proc edures for' the. f 011 ow; n g.. three' .(3) term commen ci ng . Jan u.r y 1,
1990 and be distributed' to affected municipalities and agencies.
I, Th i s rev i ew procedure shall be repeated every three (3) years.
I,
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, " '''', '::"L'AI(E';"O:Ul'tEt:,::'C'.ON,iJ.tQ'-f,~:,.ST,illJ(}TURE, , .
DISCHARGE' 'Z:ONE,S: :1\.l~D~::~:,'*t:LO,'Y~:nLE:" I)ISCI~ARGE nATES
. . :', JAN'UA.RY:: 1;198J(:;:'::::~.'::::',JA:N:UA:JlY":1, 199 0, .
906 ..' ..... .>::...~'. ..... . ..: c.
. . ". . .. ..{i.,;,........ . .'. '. ..........., :.'
<) 0 5 'p' ' "," :,' ,:' ',', ' ..':: ':' --:.',.,".::' :,:-:, :,~, ,:':,,-'- " :,'~, .'. ~,'" ' "
Z, ,."p ", .', "Z",'o',..... e' "1" '"",:,"':::::.~::,,: .'" " :, ,
~ ' ,'.' . 'MA) i'MUM:OUTLE.i'~:::HANN'~L:,<iA~A,( rry,""
~ ."'" : "",:::,' ' " "-:,',:" '.
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j 904 . .. "".::,',>. ....... ..". . '. .'. 3. .
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~ '. .. . .' . ',. ..... . .'. . "";<~rit E2"':. ....... .. . .
...l903,: '.' ':" "',', ERO'.T'O '50,':CFS ',:' ,,' ,
~" ': , , ' ,',,' '.: .'~::':::,,>"':i,: ,':.' '.' '.", :",,'.',:',,: :, p', .
.-i ' ,
g: , ZEfl~~~ ~: CFSi~ ~..:::' .... .'. .. .... .' .'. ..
90_ , ,.' , . c '< ":",:ZOIlE',,4" " .', " ': ",' . '
. ' .":.'...., " ,:: ,:.': ':::~',>::' ::~~,,:~'p,~,~ ;:HAR(%E: ',,: ':' ";',' ','. ,n ,:,:' , " , ",,:,.'
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JAN FEBNtA,R', APR .:M,~y,'>:,:,'J~N:' '.JUL,'::,":AlJ9' ,SEP OCT Nqy DEe
"':.."',: " '. ".' .~.....~..~~.:.r.,;.:.....;::.......:.~..:~:::~.L.:...:...........," '..~ ........ ;.....:..:... ',.:..;. .'.:~':
A Lowest gate sillelevatio.n",:',: . 'c . Record,~hig.h::':w'~t,~.r,,:,,:,90l~~<i ~o.7> . :-:: ,:':, ,',: :", , , ,
_ "Onllllv l..wut_vei_ ,..:',_:<~"(j~::',.':",..;:,...,..:.,.. ,.. _ _ _ _
-- .. -," .. .. .......:'.. . '. - - .. .' - !!!!
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" MOl'~tTl-ttY':'tltGlr. A.ND LOW ,
WATER SUR'FACE,,'E~~V4rIQNS"ON PRIOR LAI(,E
. ",'.': -19~3'<~-: 19,86 ",', , ',' "
906 '...'" -
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905 ,
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901 " . " , ."
JAN. FEB MAR' APR, MAY, .',JUN,JIJLAUG ,SEP, OCTNOV DEC
. ." . '. " '. ...
.. ....... ..".
A High '."ater level:-:-90S.68<7120) , .- . ,... .. '
nOrdinary high waier ,level . . ",
.
CITY OF SHA:KO.PEE
INCORPORATED .1870" =~_'~.m"':""'----~_=B~""'''''''''''''~~-~-'-~~~ -'~-="~
129 EAST FIRST AVENUE, SHAKOPEE, MINNESOTA 55379.1376(612) 445.3650
"",.,;;
July 20,1 1981. RECEIVED '
..' .' "AilanKremer'" JUt 2 21987-
"'Hickok:.&:As,so,ciates ,'EA'H' 'j' .".' '. ..', " I
'.'S'45'I' d' M d '. ..',' , . . ,lckoK&Assoclates" " .
.'. ,n lan" oun ' . "',, ,,'., ":
,: ',,'.:.,:...., wlth'. y'our-', 7/7/87:-.transnp.tta,1..: :I'he .docum.ent.iappea.ts':,.,~o>b',e:,.
,.." , .>:,,".,' ":,' " ,: a c c;~_p t:a~~'i"e,;,: .,': 'F ,'woul d, P e,". i n t'e r'ed> ted:::.~ji :'::s~,~~,lfg " :the::,:~a'fa:';::'Eln,d':'I'.'
. ..' ,:, ,.:.,'. " ,:"::' .:calctila t,fon s: to: '..s'tibstan ti a t'e chan'hel'.."capii c'i,ty. '~:":, .... '::- :.' ::',: " '. "". :.' ,,' ," '. :.., "::
.: " . .....,.,.. . .... '\':~!': ... .... .......... ; <'.. .. ;" ..>..'. " ;.. / ... ........ "':, .... . '. .... .;.. < . .... .'> .
., "SlncereJ1.',',:' .. ' ., " " . " ""1
'. ..... .... ....:i>~ff'; ......d ":. ............:.. ..d_.' ..:.... .' . .;; '. ..'
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.!.:;.~~/~m~'r'. './ .... ......... ..' . ...<.>.... 'i.
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The Heart of Progress Valley I
. ,
I ,
, ~ STATE OF
o rNJrNJ~~@j]'~
I
^/~ DEPARTMENT OF NATURAL. RESOURCES
PHONE NO. Z96-7::23 ' Dfvisicnof Waters FIL.E NO
,I 1200 ~arne; Road, St. Paul, ~innescta 55106
'I "
, August 14, 1987
I' , ,
Prior Lake-Spring Lake W~tershed ,Cf.t::t"'\ .....
, , District ..........- Ov; .
... 'l~
m., Stott Rice T~le~horie Ru11ding .' . .4!/~'J ....
4690,Colora~o St~eetSoutheast ~-'l~.. . R: ~QIf? '
pricr,'Lake; .1'1N ::372 . ':...". . .
,', ..d.,,?- .
, . ' ":,,.2.' '"
g,. 'DearCo.ard of Ha~agers::" ~:."~~c..)",.. .
'," " ,.'."ill.tl
....s
" . SUBJECT: ' ,Permit' 79-6015 :"'. .'
o ...' .' '. . Outl.et .Control ,'Pl ~l\'Appr.o\f~.l ,:' '.'
. ' '
, . ,'i' ',,' Pu~,sue.'nt,: , to'spec;'a', ',,' p~ov,i $,iOIi XVr'II o'f'.)e:rmjt 79-6016, as "'amended,'
0,.,:, '. : .' "July .20".' 1982j.:theD'epa,rtr.1ent :ofN?-tur'al ',:.Re'sour.ces, ,h~r~by :a,pproVes;.," :.'
, ". " .operati on' ,of. th'e Pr';,or' Lake: "out, e't structure,,. as' defined 'iiiIlMa'rlageineht.: ;"" .',' ::"
, Pol icpod Opera ti og p,:ocec\ures" da t~d .luneI987, .... .,' ," '. ..,..
U,',",.: " This' pl an .is c'onsistent '\;tith'the' gIJid'~l i'ne~, established '.undei~1i'rlnes,6ta"': ..,' '.
" ' Statutes, ,Chapter 105 ;.44~.Futt.i,re" arne.ndments' to the operati.on' plan.' sha 11' , ',,'
m. " be governed by. '~he provisions,.of Secti'on IV(2). of ,.the. 14anagemerit Pol iCy"
". , , ' and Op~r:a ti ng 'proc;edure's . " '. ' " . ' . ".,...'
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. By'-'adop't'; on of thi spl an" ,trye ~latersheq., Dfs'tri ct....ha,s :"d~monstrated:its:,' <,;'>
E':, . .,', , ste\oJardsh.;p of the Prior Lake :W~tershed .'Th:e':sta ff., and, Board,. of Ha,'nag-: , ' ,:',
ers ',of the ,Dist'r;c~'are: to be cOJl1lnended ,for leadersh'ip:in' the "management<'"
ofnatural"re'sl;lUrces'.':, " . . , ::',' ;,:;,~:" '" .,' ,', < ',: "
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I City of Prior Lake
City of Shak opee.
Spring Lake Towrship Board
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i Scott County SHeD
I Scott County Zonins
St. Paul Haters
I AN EQUAL OPPORTUNITY EMPLOYER
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Exhibit 5:
II Outlet Conceptual Plan
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PRIOR LAKE OUTLET CHANNEL CONTEXT MAP
"
PRIOR LAKE OUTLET CHANNEL :!l!
"t
FUTURE CONCEPTUAL PLAN .:I",
Shakopee, Prior Lake MN
11 -
~ ~ 3 ..
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SHEET INDEX em =~z
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Cover Sheet 1 -,.. ;..:-;'
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Goals and Design Directives 2 g:.~ ~.S~
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I Proposed Outlet Channellmprovemenls 3-12 f. g:.,S
Plan and Proms Drawings ~ .fi~
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-. I Owner: ~~~~~.:
0" I Prior Lake-Spring Lake
-. Watershed District
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NOTTO SCAlE 4 16670FraokIin Trail
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TWIN CITIES METRO REGIONAL CONTEXT MAP Prior LaIc.. MN 55372 oS
(952)447-4166 "
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District Engineer: ~ !l i!~~~
-t" :~v.:.;" .t. ~l .,,;- ~.'~ Wenck Associates, Inc. ~=o "f:;t
,t ."-f., '?i!:,:i,'-': ~ .~< 8.E~~
,. "'I:\f~ ,- _ ~' '0 ,,- ,,,,.! 1800 Pionter Cttck Center r:!~.~5::aS
' '::"-~':~!",,;.~,f, Maple Plaia, MN 55359
, ",. .', '''" ~'_.......~" 'Seg-lCC
. ..C. '.,;;, ~ '.r"C..~ -:~ Ph, (763)479-4200 is ~ ~:if~
.. ~ ..h....... h .... r..~T', )a.c '-:;;:'. Fax (763) 479-4242
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-- ~~':-.~'-i-:':' '1' ,- -.;~~:. :,:' -~, Dhlriel Ecological Designer: ~ J.!
," 0 ~ ;!~, ,~_t ~".~' , The Kestrel Design Group, Inc., Z ..
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;;,~,;;~~~~:~~~ 5136 Hankc:t'5OD Ave. Suite I OIl_
Ed... MN 55436 ~ ~~ ol!~
Ph. 952 928-9600 <U ~.::
Fax 952 928.1939 ~ Eo< CI) 0 l:l
www.kestreJdesigngroup.com. ..l<: .....
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-~ . "", ~ ;~o' /; .,:- ; . _7'" - , POrtiollSofthe concept development fimded by the Minnesota Dcpart- 9~S~S!!
meOl ofNatura1 Rcsourees tbrougb a Flood Damage RedllCtioo GraOl ll:: j;;l or:: ... ..
.'.=&'1: -=- I , I .~ =..OP-.~o'::~
Project Area ~~ COVER SHEET
SHEET I or. 12
PRIOR LAKE OUTLET CHANNEL
MISSION DESIGN ASSUMPTIONS: Q~
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To insure adequate cnpacity and t;:banncl stability of the Prior Lake Outlet Cbannel into tbe funue under existing flow and easements to couvey Prior Lake . Assume future stormwater discharges to the channel based On future conditions land use -~
overtlow waters to Blue Lnke and prevent mbitrary c1osW'C$ of dIe channel 10 Prior Lake discbarges. model$ provided by the Cities of Shakopcc and Prior Lake. .:I..
PROJECf APPROACH AND TIMELlNE:
. . Coordinatiop with property owners and stakeholders is essential for successful eootogical design POTENTIAL PROJECT EXPANSION
. Outline of concept p!anniDg coordination and review for Prior Lake Outlet Channel: ,
o Property owners MISSION ~ J ,La
o Technical Advisory Committee
o Daoud Review A) Stabilize Prior Lake Outlet Channel under cxistiug flow and a much wider casemcat- a.!i .!iUS
o Agency Review 200 to 300' wide - to both convey Prior Lake overflow water to Blue take and provide a
. Prior Lake Outlet Cbnnncl Concept Plan is conceptual in nature. conid~r for a greeo.way connection from Prior Lake to the Minnesota River Wildlife Rcf~ .. ~~~i~l~.;~
. Prior Lake Oudet Chanoel Trc:ntmeuts oudined in Concept Plan aR geoeral. uge... J ::~'-
. . Prior Lake Outlet Cbannel construction documents win be produced based on Concept Plan recommCndalions with field fitting employed 1hrougbout. B)...witha potentialllOn-coosumptive recreation trail cooncction pet abovc. ~ .tf"'l~
PROJECf LIMITS (pHYSICAL PARAMETERS): PROJECT LIMITS (PHYSICAL PARAMETERS) ~.~ ..IJ~
0
. Primarily tl 30' 10 50' easement thai occassionaUy expands, also including public watersatongsidc the outlet channel route. ..
. Easemco.t eXleD.ded to 200' to 300' wide where feasible cO_
PROJECT GOALS: GOAL .~ ~.~
I. HYDROLOGICAL PARAMETERS: lii "Ej; en
. To become part of a larger gre:coway connection. managed cooperatively with other Q cP U
. Minimize propertY damage 10 landowners along the cbannel, wbite minimizing Prior Lake water level fluctuations aud property damage to lakesbore own- -aQi:j 00\
stakeboldttS aod io_ parties. .~~ !~~~
C\'5. ~ ~ ~~;;;
. Preservc Prior t.ake.Spring Lake Watersbed Disaicl'S Prior Lake discharge capacity rights 10 the oudet channel from consumption by stotmwater_&ener. ~ cP ~Zs: ~
aled from new development .f:i ~=~~:;t
. Limil flow rate from Prior Lake to maximum capacity of c.'Cisting pipe: 65 cfs. l'=~!~~
. . Require entities using the cbannel as a slonuwatcr trunk facility 10 provide or pay (or this C3padlY and contribute proportionally to the maintenaDce trust.
. Use a holistic approacbtbat combines upstream runoff management within Prior Lake Watershed to minimize runoff to Prior Lake Channel with aneffi. ~ ~ ;;:;~A.I:-
dent oUltet and stahle cbannel.
. Repairl ff'uofir o( driveway crossings by Prior Lake-Spring Lake Watershed District wherchydrologicaUy nccessary. Crossings become property of lao.d
owner.
. Issues of sleady base flow or navigation were not considered - this outlet cbannel was designed as an intenniuent Bow regime. J
2. STAB<L[ZATION: "
-jj
.. Stabilize banks so Ib.'lt they stay within easement to",
. Use an integrated structure approach 10 soil stabilization focused on soiVroot interface rather than a surface application approach: maximize rbizosphere :!2~ON
and minimize use ofbard annor by using vegetative soil stabilization rather than fieldstone for bank toe stabilization whenever possible. ~28~~q
. Where bard armor is necessary: use fieldstone (igneous rode) rather than limestonc to mazimize life span. .~-< ~.gt~
3. NATURAL AESTHETIC: ~ ~.gflai
., Give Ibis maD mnde channel (ditch) a marc natural channel stream feel ~ ii g -aCt::.
. St<lbilizc in a onluml aesthetic. fS ~ ~:2f~
. Maximilc usc of ycgetative soil stabilization nod minitnize use of bard annor.
3. W<LDLlFE CORRIDOR: sa ~
. Pro\'idc wildlife babitat strUCture both in aquatic llDd telTestrial zones of Ibe Prior Lake Dudet Channel where possible. Z ..
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. Preserve, protect or cnhanee the nquatic cnvirownent of the watetbodies along tbe oudet channeL OD_
. Ptcser:clcobance babitat conidor for wildlife migration panerns especially Neotropicalmigrants, amphibians. and charismatic lepidoplera (bUUerO.ies). [;I;l:t:~ 'C'C
. Prcscrve! cn:ole/ enbnnce a community osset thot combines a. eomdor (or watcbable wildlife and nativc vegetation with a functional channel for eonveyitig ~U ~:il
water IUnoff.
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4. MAINTENANCE: ~[;I;l~ ~'g
. Secure momtcnaoce access chrougbout channel length. ~~ ~.;j
o E-< ... ., .. II
. Minimize long term Dll1intenance needs and capital cxpendirores for the outlet system. sa;;J .8 j.5l ;;
. Minimize mamhmnnce by mimicking prc$Cnlemcnt vegetation structure. ~Op.. ~~
. Anticipated m.1infCD<WCC rcquius cootrOlIed burns, selective shade reduction and other measures to maintain integrity of vegetative
trc:auncnls and their rbizosphcre (rool lone). DESIGN DIRECTIVES SHEET 2 of 12
- - - - .. - - - - .. .. .. .. .. .. .. .. .. ..
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23+00 TO 33+00
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, CANARY GRASS.
2. REPLACE 36" CMP@
32+50 WITH 42' RCP
3. INSTALL PARSHALL FLUME
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1, RIPRAP WEST BANK lB' UP FROM 43+00 TO 49+00 ~~F f'm~~r~r~'- ,
I BANK TOE. '''-'m'~' m"____'__'~'j
2. RESLOPE EAST BANK TO 3:1 AND 1. SUPPLEMENT UPPER JEFFERS POND _.__iJ ' ~ ilJ ~~tJt1f.,
VEGETATE WITH . NARROWS WITH lIVE STAKES AND IttWo>H
3, SHADE REDUC'iiON:i1ERBICIDE HERBACEOUS PLUGS. 'G
GREEN ASH, AMERICAN ELM AND 2. SHADE REDUCTION: HERBICIDE
SMALL SUGAR MAPLE, BOXELDERS AND SUGAR AND SOFT
4, INSTALL LIVE WILLOW. DOGWOOD, MAPLES. L!'; 'F
aoER. SHADE SSP, STAKES ON CUT .- '
I BANKS AND NEWLY INSTALLED BANKS. 3. CONTROL BURNS IN REED CANARY
5. PLUG PRAIRIE CORD GRASS, SWITCH GRASS MAT ON SOUTH SIDE. '"," ~
GRASS, CUP ~
PLANT (EXISTING) AND SEED ,..
ON NEWLY CUT BANKS OF POINT. 0
6, REORIENT ROOT WADS AND SNAGS
33+00 TO 3&+00 IN BANKS.
I 1. REMOVE SEDIMENT DELTA j,
AT 33+50
2. RESLOPE CHANNEL BANKS. ."""" .~{ ",.,.",,--': ~' :;. ~~""~ \;, !~
USE CHANNEL MATERIAL AS BACKFILL .~.~:~'$-",~'~~':-'.:~'-~ ~~~~:F~-,. ""~1'; i
3, RIPRAP (BOULDERS) BACK 2' UP I ~~,.~j'~,..;:..~.t ~'" "?"\~ "'>lJ11
FROM BANK TOE. ?f!:t.~:n{""i ,', ~~"": ....
4, SHADE REDUCTION lREAT
WITH HERBICIDE, GREEN ASH, " :)" ,-'U . l,,,,,,,,.,,'''1~ i
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5. USE SANDBAR WILLOW COLLECTED
ON SITE ON CUT BANKS. !
6, PLACE WILLOW UVE STAKES ,
ABOVE BOULDERS. ~.~, .~.~.:~~L~~~;~i~~~ ~
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I 41+00 TO 43+00 ~.;; h1';''l<;~ qf;f'f ,,:'.~~.t$M~. ~,&. I j i
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1, LEAVE ISLAND IN PLACE. ~.. "t <)~':':~~~'>
2, RESLOPE EAST BANK TO 3:1
3. INSTALL RIPRAP ON WEST
BANK24' UP FROM TOE, f:;-}....,;~. {I.~: i'f~'~' hi
4. SHADE REDUCTION: HERBICIDE ~
ALL SMALL AND SOME SELECTED ~,;~;, .. . \~l~ ~~::;~. 'l '~l..!
I LARGE SUGAR MAPLE, B .1
5. INSTALL LIVE STAKES ON ~e
RESLOPED BANKS, I~" ~
6, PLUG HERBACEOUS ON NEW i I~ , ,
POINT BAR. ~ ~
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:~~?:..::"'" ' ';;:~.. =";..~.:"~~;-~: ~-:--r,~-~ 'it=~=__ :~:~~~t:.::- :-~.':f-' -:..-::~.j_..:::~~t:=, :':.:=;Kt: ::, ::' ~- -:~-=r -:':-:~-l.:'~f'~ ,-~~, '..l..,:~'~::--+ '" -:~: r~ ~J ' ~ ~:-'~~t:_ ..:..~_:r~~~~~~t=~~':-'I'::.l',:.' ,:n,..~.A",".,_>", J-..". u.", Po< ~
I ---t----- ...-:p L_,-:t-_,. ....=-.__-l'ClND-'=t-:::_=--: - ~:~~ _=:.. .__ ,-=-_~:-.-:-..l:::'~-T -~=..--'! '::-::-=~T------::-:::-r-.- ':'-::':::-..- ''''.~:-'l~:- :-.---r.-'- " I ..... ,.'. . ____ i _,__, ~ w.., 119+00 TO 121+00 AND 136+00 TO 144+00 I 820 ~
820"",,,,,.,,,.'" 'J:'-::.':-:-..r:".: T.',::-----,'+..:::" ','-,,,,,','.' :W=ll20,O: l. 819,84' [" ... --j- a=n..~j_~:'~:,,:..:,_____.:.i::._____._j::.._,:,_..:!....,,-,=--J,.:::-:---,':_:.:..::_ i~l.:=, :1---'--'--'
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- -, ":"',.;:.~~=..:.'=... ;~-- --I--~--"-I- I I I ' , ' 1 L _.n.___...._.'._._"_.~ ._.'._____._. __' "'","01 ~WUl_ - 790
I 790 ~ ~ __ I" ,,=,- - -i~,-.' ,-, -=r - -- -- -- T---'--- - t-- --, - --- - t----- --' --- - -- - -,- -- ------- -- - ,--- -- -- - I c Ii, ,-- J! - ----
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i.....- ...- _. : .... ...-. _.~~--_._--~-~ ._-_.~ J' l:l' - l;l ! ~ l:l .,J..l;l..... '..,....r.., ......,-, "'......, .." ,"", "'..-- ;-..,--- .. ..,,'..,"" '.0'....', '" ' ..-""..' "'-T" .., ,.., .. ,.., .., ,..j~ I" 1.. ,'" 1: '" 1 '" """, 1.., 1._ ...__n."....'
1 ~ =,=~~~:=~.._=--,,~:.~'=~-=... .., L... "'1.1s:.00 lIB~~)(j ;20+~-n' ;22~ito' , '124~O~ "12~~" '12S+00."" lw:.~' ,," li2+~' ';34+00. , ;36+0<) - 136+00" 140+~.... 142~00 -... 144+oCI 146~ -, 14rl+OO--- ,. lsi};Oo ,- 152~00
.. Plan and Profile SHEET 6 of 12
1
I @~~
l.~"'_1
I ;rB:rrCj.-- l~~=,,"oc^,a'.. ['1~~~
\lFJ"a:rMI~'I~lll'(I'J1;);t1IUI\Il\.tbA"'KRU'I"INf:IId~'.).")1; 2. INSTALL RIPRAP BOTH SIDES 24" UP /JG~t:~..~~.,.1' ~ i ~,"~'~r~.~.~".
.............,... FROM BANK TOE "'''':'Il ,,'I rl \ \1'J~iI-
1....I~I'-IooIIad;I.... 'io~SIIlt .' 4! to. II .~ r. !l :,/~r(;;{l
I ....,_." .>::;::.:;'~==~ 3. SHADE REDUCTION: HERBICIDE ~~ ,:-,;,>' '" . "~" "
I ....:~....::;... ..- tuW~_ SHADE PRODUCING PLANTS. ;'~ ~~:iI-" Ilob,\_ ~:~.=- I
'.~,,,,>;,:"""'-"."".' 4. INSTALl LIVE CUT BRANCH MATERiAl ," --- ~
ON CUT BANKS. :::.=... ~,';;: ::
......n.a~..
....-
""".IU.I..........IIIoUo\....Pllllu.a.........lo&A_........,.
1t...III'<1lb'n.'^lft1Ul'l."''''l.'IlCI.~I.~
I Vllo:LrAT1\l:Q.IJ/lXnU;1l1:lO\V1IA.'IOl.:"VU.llQ:IoU:lI1C.NU ___.u...nwr__ r
~~GI,TAII\fL: c:a.OlI!X1IU:. !i i
{n:.....-.II.I."t"....fO:a" 5
~i;:~e:: ~ ..;1..:
"""'1,"""""'. J~-,..d,"; 171+00 TO 172+00
,.., ".... .'..."il ' ;'E::'I\t':':"'l, 1, SHADE REDUCTION: HERBICIOE , I ~
I I 1,,""fILiljl1!~\4!'ii' BOX ELDER. . ,
!I.\, ',-J,",Uii1IT=;'J!:.:n~\'\J:;;: :'i 2. INSTALl HERBACEOUS LIVE n I I
I~~I"\ 'I~CTI1W:jil:!n~~T~~~jl-I-Dll;:Hlt PLUGS. I ..
L........ \ '''''''~lEl\'''''I;::j'' T' f'i ':-I::LIf- ·
"'" <'44Q\~/~+iUIF~1fill#r.rr.~'jl-' ~ " ~
I ,..,",\:L!la},jp'J]11'N11.'-[:llT . \ ~
~'" \II=cHWill,JJ,;']F:V, ~ · . "
\; ~liU!t{f:
"",
U\'E ST.\I:I:S' socnON ,~'11i 175+00 TO 178+00
l''''-~''''''''~' 1. BURN OR MOW AND BAlE REED 10
CANARY GRASS ON TWO TO Ii
I ~~
2. INSTALL UVE CUT BRANCH. ~
3. RESLOPE BEND AT 175+00. " ,
4. INSTALL BOiJLDERS AT OUTSIDE ~ !
BEND,175+00. ~
I ;~
f g
i
I COJoo'TROLLai' nURN ~A:I1V~ 1l1ln'I"H . SEt'nON . NTS
.(;n~,"_IIIIUt'N"u.",,::t"" 1t.::'l1l1:(;..-..r;."Ik'.{dl(;r.,.)~~1IJ1 -<
I -ilENCHMARKELEV ,-- "-"~ PHOTO FLOWN APRIL 16, 1998 B.O.P. TO STA 167+00 0 200 400 ~ ~ ~ z I BENCHMARKELEV--"'---'- ~ ~
i PHOTO FLOWN APRIL 19, 1996 STA 167+00 TO E.O.P. I ...:l i
I
_ ~~:~:- _L. :-=f:=~t~_. ~l~:+_.-~-:'-.:-T.==E:.:+:~.---~:.:::::::c~=-j:=l:=-=-l===-F- :::F-=--::... T::. :=:J===-E:-:: .F=F-::"=-t-:~~=-;J~~~-=:=:t-=-::-J-=:": 8
I r' -,,-- --:l ,-- I --'u'r. u_ 1- --- ","""- 3" NATURAL GAS PIPE CROSSES ,,- -,-,.l., - -, --1--'-'- ---I-. --.. " --,-- --' -. ' '-.1-- --- -'-1--- ,-- ---- I. ,,__n---t --- --- - ,ton n ,--- -- ___....1 -, ___'+__h_____ 'r-- -, , , r' - r I I j I ~ A
815 I I. 1 I t-I L I I - -, __+______--1.-______' ---, 815
. -..-,.. '-'--- , ------'----'---.-----'m'--.OUTLETCHANNELATPIKELAKETR -.-1-----.-..---..' . ----.-, --, -"0 -----I----r.--'-----,--'-'-I---'- --'-T"-----------l--'-'~~- - 1 L---I
---- .~- ---!-.--~--.__+_.-._.- ------- - l - - I -..-.!.--!--------- ~ I --~~ -- ____!-____J_.;--__._~ -J-------~--i-=_=~~+=~_-_~._ __._..__J____ -.--.1-- _.-:-=0-...._ ---
i ' ---,-- L-- '-----";'" ':"t---- - ---=1 ,- ----- ,---t-, -, -"..----' ___l ,-,.,.' .--+ ---' -.. I ,- =r:--_. -. -' - ----- '---1:=-- - -..1.. -- - --'----iil'T.' ---=I:=: - -'~- ----- '-j",,--,-.--,I- ,- ,-+-- ,-,f-- ---. -'!----..=r.., ,,,. -- r r -=F---1-----l-, --l ...:l ~
--, -- -~- 1-==T-=-==r.--=--==F=-=-,+=.=-=t-=--=-,:i::::='::--F'=:::~=~C:--~ ~t:-~==--===::i__ --=:t-====~~; -1.._::.---- -=:=r:::--=-=1====i=--=--=r-==--' =--~----==--f- ~.__,_______J, h_'__'_: ,__ ,-:-=:-j'- _,m__ ~...:l
I 805 L._.., - '1"" --- E- -- L=~---'--'-"-- - 'l '---l-- ---i'---- -- ,- -,---- -" ..-_-,----L_""'=J ------t'--ifi'LL-- I - - -1- - -,- - -- --, - t-------'--..----'==t-.---P'-----!.-"--- ---f--------I-'" ,-- ,-I l t 1 805 >-< ~
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795 ,-~.--.,_.-.r___-_.__........ --+--.. _'I.._-L_~ -----r-......,.. .-~ -. . - L ~.f--E.-!-..---!-------.-.._..L ..--r'''... r-u.-.'.. --.r. T 1 I I 795
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I
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------ _ __ ...:_ --~" r . : .- _ _~.. :- - - ~; ".- - i". q-" i-" __" j ~~_" "&t l~ ~ ~ _; Si- ~~ -_, ~_ ~ ~~~.. ~_ ! ~ _ ~ --~~_ ~ ~~-_""l_~-_: -~:=.r fJ:".= _~r .-.r;_ .- ~~-_- U:& - ~~- .-1 ~ _ Fie _.L~."_ -~ -- L~~::' .." ~ . ~ _ ~.. i - ~~ -- _ ~ .-. - '. -- ~ n_ 1-- - j---
, " to <D to to ,CD co I..... r] ,It) (") t.... Cl 'CD to 11 ct '0 0) : co ..... I (0 to '(0"- cp I II) 1t).-.L1E 'I I 1_";
_____ __. ~"--:-~._-~~ ---"~~ -~;~-_=_-L--~~.r~_=_"~.-;-~"=_=__t~~. _~~g- ~-=~g __=~ '~=-.~~~-. .~-~~ ~~ ._=~1~_. ~~ ~_-=-[~=y ~=-~~~-~-'-!~~~=-j~__ -~._!.r:'~--~:--=~.-~-=-~"~~:- ~c~~r:---.---~--...",.,.
I -;---".------"",- ---.-,---..--. ---' n' -,.--- --, ",,1,~~_,,' ,.!~:"~ 'n'.!~~O'_,_. ,~5.!l.':~_,,___~~~, - 1,62.oo..,___1~,,0<l._.,_~~:.~ _,___1~~D._,,!7.l>:"~_, _!!.2.!D.o. "!!~~",,,_,17&.'.00 176+00
Plan and Prof1le SHEET 7 of 12
I
I @)~ c~oo~
_U:.....I...... '~I........... 213+00 TO 231+00
I *_.......Clol-liI_
.......JM.:r.....A.... 'i" 1.INSTALl RIFFLES AT 216+00. 221+00.
lO:).",..,...,__, ~f.~ :.'(.;. AND 226+00 TO 231+00 FOR FISH HABITAT.
~.!~ 2. SHADE REDUCTION: THIN CANOPY OF
COTTONWOOD (CHEMICAL AND
182+50 to 192+20 MECHANICAL),
1. FENCE CHANNEL TO KEEP OUT 3. PLACE LIVE STAKES ON RESLOPEO
I "~''"I ' -r it II ' "~ill;}; LIVESTOCK. CUT BANKS.
2. RESLOPE BANKS. 4. RESLOPE BANKS TO .3:1 TO INCREASE
"!IJ:r;.~{ .: J il ~;~ 3, INSTALl LIVE CUT BRANCH CHANNEL CAPACITY. i
MATERIAL (NON-POISONOUS), 5. PLACE HERBACEOUS PLUGS IN ~
POINT BARS.
......... 185+00 LOOKING DNSTREAM 187+00 LOOKING UPSTREAM 6. MAINTAIN SUNNY OPEN CHARACTER
I I""".~l -.....--..."". FOR BEST RHIZOSPHERE: BURN lWO
........i,........... 1~r:,!I......,.l\olot< TO THREE YEAR CYCLE.
u~.."'".'"
"".u....... LOOKING DNSTREAM lie
f"1lI")j."!oU'IIll\.IIl..."~.II1t",,,"U.I."t..tIl,I'*I': \f.\.'ooMili\U'Kl !~
IHV..'.....'II'1n'l' 1~1'__'ltl_~. .u.IH;J,tIl.l~'I.\'
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I';""",,,,",",... ~ ~
~''''''''''14no .
199+20 TO 212+50
","'nUDI.A"'!) m,r'tl,R, 'U;f'l)R~ ANnAnHI M"'''''\c;P,U'.'NT 1. INSTALL PLUNGE POOL AT 199+20.
,,:,............-.-- 2. EXPAND ROCK DROP STRUCTURE 201+50
I 3, EXPAND ROCK DROP STRUCTURE 204+25 H ~
4. INSTALl LIVE HERBACEOUS PLUGS ~.
WITH BLANKET FLANKING DROP alz
. , ~Ul1cr ". . STRUCTURES. ~~~ ~
5. BURN. MOW OR BALE REED CANARY ~.I g i
q---".,~ ~j/,.II"'" ' GRASS MAT ON A lWO TO THREE ~~ . l
, j, I "" ".,' '-. ' 'Q YEAR CYCLE. ~~~S I
I ~1'~' 8. INSTALL BOULDERS ON THE WEST !"s~
SIDE AT 204+50 TO 205+50 3 FEET UP ~~:'.}~~!;C:.'.~~;i~j ~.~ ~ ~
': ~[" ." FROM BANK TOE. ~ sis
204+50 TO 205+50. rH e =
..... I . . 7. INSTALl BOULDERS ON THE EAST t~:~i,;:"""",,, .. ~T1lF. JH
I"" '-. .,'
~l ---.! ~ CHANNEL SIDE 3 FEET UP FROM BANK TOE ih e
..- 203+50 TO 204+50. -'-1 A' ~.l ~H! I
I .":"'~~ 8. PLACE LIVE STAKES LIVE CUT BRANCH . .f ,< q.j5'k~' . '~<;""~~!;.l \~.11 "~I..\,,,\;,~gj~i?i!~~rfl~~~~,
.... IN CUT BANKS 201+00 TO 205+50, < ,I, l'I...t~~~, 'll!t~."t, '\'~',.t~,
LIVESTOCK FENCE :.t'\l':i'::::::"~~~-"""'-"- 9. PLACE LIVE STAKES AT ROCK DAM BANK Jl\ l'" '11 . V~11'l.
-1................_.-...._....,. .j ,::::1'; rf,'11 (\~ \}.:-;) -- \ ~~i1"j"w"\ ""IiI",,,l\l
<{:nfM: kcsm.1 lksi{.'d (';roup ;WOJ ftC"...., :~~~~~~~~~, EXPANSION 201+50 AND 204+25.
10. HARVEST SANDBAR WILLOW FOR ~
LIVE CUT BRANCH MATERIAL AT - ~;I~':~lrr'"
I ... ..~_..~ .-.....-. -.. ..--...-. .~.. ....... .... --,.., - ,.. '''''''''-''1 200+00 TO 203+00 AND 205+00 TO 207+00, };Or- S~ z r-<t)
BENCH MARK ELEV i PHOTO FLOWN APRIL 19,1996 11. LIVE STAKE INTO "A" TYPE CHANNEL
I TRIBUTARY ON WEST SIDE AT 209+00. 0 200 400 600 Feet 5rn
! 12. RESLOPE CUT BANKS TO 3:1, LIVE gi
i STAKE AND LIVE CUT BRANCH LIVE Sl.^"ES. SUCTlUN. NTS
'"-'--_..'.''' '---", - - ,--- -.':' ,--- -- r --- ---,---'----:r---- -,------,------. WITH SANDBAR WILLOW, DOGWOOD, ---.--,- --------..----i----y---- r- ,--- T ,--,-,----,-..---, '..."..................,
I I -'--l---"--r -, " ,-,-,~,---u.---"'._--r.-"'--'-'-1-'.' ---'!.... ELDER. IMPORT ELDER AND DOGWOOD. +,----1.-- .--, r----r---.------.. - -'-'-- ,.. -'1'-
~~r~~~~-~:~~=~=F~~~--~~~~~ ~~~ ~ ~
I ~,-' .1=+. j .1..,.., ~-- -----=I::.. ' . Mru",,- """"' '''''''' oonn . t-- -,- -. -- .-=t=-. .::1::, -=l~.,J---- -=f=. -- . ]:".., j --,- ~, i'- -,' -f--'I ~~
~2". .~::-=-; '~~;2':~I~ ~~ii::.: ~~;r= ~~~':';'~:'~~.:.:i::Jf:,=::t:~'~~ ~.. :t~=t~:1~~:~f:::j~=i,:- f~=r~l.:f~i~~=i~::~~;r::.""..'.' ~~
Il-cO
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"''''''''''''','' .-,+---- ~-F.---r--.....,.- ~-... 'Er-'l--~'--~--- ~"~r'-~-- +. ...., ,. -"-l , 1': [ I
I ,0 76.4 I I I >:~. ... '_ __._ ~.__.~._._.-.--
I 760 --t ---,- ---.-F------r-'-'---------'4S"-OMP-'-' '-r--------'---.--' -1--'----' ,,-'-, \ --."l--- -, .,ri!--------'T- 'I' ! <O'! I I 760
~~-J ~~ ~~~~{~..;
I j .- ','n .. -1"-- -. --~ --I -' .. 'rd" U t- 'j .. t -., m -- I .. ---. . -',' u, """--""-" dm u, t -- . ,_. ~.,. ., ., .1 J
I
I
I !Z 178+00 18(1+00 182+00 184~00 186+00 188+00 19(1+00192';00-- 194+00 '196+00 198+00 20(1+00 202+00 204+00 2??:;:oo-' 208+00- 21cH-00 212;00 '214+00 '216:;{,o 218+00 220+00 222+00 224+00
5 ~.-.~ .....~.. -....... .. ....-....... -.. ...-..--.-.-... - ..-...----.-----..-..----............-.~..--.---.........-......----.......-- ..-.--.. .-. .-.-...-.--..--....---...-.....--... ..__..._-.__.._.._-~..._.__..._---...._... ...--.......-....-..--....-... --...-........ .......--.-..... ~_.._...._._.__....._...
Plan and Profile SHEET 8 of 12
I
I ~~~
227+50,233+00, 235+00
I -~$
_..,,:;:..~m
1oU11'iN'.
Q"':':1:' ,
I l,r...,Jf'.".. .
.j,' . ~ .
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I E::~- ~~~~;,~i~i;;:; i~
213+5010236+00 235+00 TO 254+00 .._.. ~"=r....,,,,,,o:..,...,,,_.,,~.
1. MAINTAIN SUNNY CHARACTER FOR 1. INVESTIGATE WITH OWNERS TO .,...... ,.-....--" ..-.. 5
BEST RHIZOSPHERE: BURN REED ESTABLISH MEANDERS AND OXBOW
CANARY GRASS MAT 215+00 TO 220+00 WETLANDS FOR WATER STORAGE AND
ON TWO TO THREE YEAR CYCLE. QUALITY IN SAND OUTWASH PLAIN ·
I 2. RIP RAP UPSTREAM AND FOR INFILTRATION, . ! a
DOWNSTREAM CULVERTS PER MNDOT 2, RIFFlES FOR HABITAT. l I
DETAIL FOR PLUNGE POOL AND EXlEND 3, MAINTAIN SUN REGIME: BURN, ~. .
RIP RAP FROM CULVERT INVERT TO MOW AND BAIL WITH HERBICIDE ·
EDGE OF FARM ROAD. 213+50 221+00, SPRAYING OF REED CANARY GRASS MAT. !
227+50. AND 232+50, 4,INSTAllLIVE PLUGS WITH EC BLANKET ' ' !
I 3. EXTEND PLUNGE POOL OF THREE ON CUT BANKS AND EMERGENTS ON ~ "l" ! I
CULVERTS AT 2341-50 50 FEET CHANNEL POINT BARS ' ,
DOWNSTREAM 3 FEET UP FROM TOE (AlL PLUGS IN LPC).
OF BANK. 5. WILDLIFE: TWO TO SIXTEEN TWENTY
4. RESLOPE CUT BANKS 3:1 FOR INCH NORTHERN PIKE AT 235+00 AND .
ENTIRE REACH. PLAIN POCKET GOPHER IN CHANNEL " ~
I 5. WILD LIFE AND LIGHT REQUIREMENTS, SAND STOCK PILE, g ! ~ ~
INSTAll A DIVERSITY OF LIVE CUT ! H
BRANCH MATERiAl THROUGHOUT ~ ~. ..
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6, SHADE REDUCTION, THIN CANOPY OF ~ ~ e i ~
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1. JNSTALLLlVE PLUGS IN SEDGE MEADOW _ ,,.,.;;;;$i.;';''it-p<'7'''''' \':?;;'\ "" '-1.<..1 .I-I')
OPENINGS. /,,,, '~~'~: .;:_ ~-"'-i "-'71'l'-::Ot:.r-t':?'..
2, WOODY INVASIVE SUPPRESSION: , .\' :" , ~':.,,~ " '. Y;'4:"'-"'~<, ~ IA ),c","
BURN REED CANARY GRASS MAT AND ;'i~';'~'_~;;o'Ki'f:;... ~: ~..i ...'? ; ,';:" r"
EMERGENTSOF ENTIRE REACH ON "'t""T,,">'ff,,H"'. . _......--.,~ 1. " ".,,.',,,
I A lWO TO THREE YEAR CYCLE. .~, ;',;;i";:if.!~;~.:., ;'. .' ", .' .,.:
3. INVESTlGATE MEANDERING 315+00 '".( "-:;.:;.;.;,:;~:<-','; , ""~__.'M 8
r~R7~6~~ CUT BANKS 315+00 TO _._ i
326+00 2 FEET UP FROM TOE OF BANK "'~""> _"._'__'_
5. INVESTIGATE CONSTRUCTION ' "'$~
INFILTRATION WETlANDS (OXBOW) ....~._.~'~'l;-;xr' ..--........
1 OPEN FLATS ADJACENT TO CHANNEL ..-... ' "'~.;:.."..~...._,.. i.
SAND OUTWASH. ~:.: m,," I~
6. USE HERBACEOUS LIVE PLUGS ' ""~~, ,',' .
ONLY TO MAINTAIN OPEN, SUNNY .~..~.."u_._ "" ."
CHARTER FOR GOOD RHIZOSPHERE ' -'.'
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Plan and Profile SHEET 10 of 12
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SHEET 11 of 12
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380+00 TO 3S5+00 385+00 TO 395+00 347+00,385+00,404+00 395+00 TO 400+00
342+00 TO 355+00 , 1,RESLOPEAT1.5:1. 1. REMOVE TREES FROM CHANNEL. ,"''''' _, ""_, , 1. BURN REED CANARY GRASS MAT.
1. RESLOPE CHANNel BANKS TO 1.5,1 2. INSTALL BOULDER TOE ON CUT BANK 2, SHADE REDUCTION: REMOVE _ ..~'!!I'~ ThI"~";I~Im.t'1::1 ON A TWO TO THREE CYCLE.
I ~' ~~';.,,#,f~~ 'iiI.RIE MIX SEED AND 3,INSTALL PLUNGE POOL DOWNSTREAM AMERICAN HONEYSUCKLE 384+00 ',-~ " l 'f.;'; !~,! ':1 2. SHADE REDUCTION: HERBICIDE
HERBACEOUS LIVE PLUGS. SIDE OF CULVERT AT 385+00 6 FEETW. AND SHADE PLANTS. ", 'a~ II illi!~lhi II' BUCKTHORN IN PLACE.
4. REMOVE SEDIMENT IN CHANNEL x 50 FEET L 3. RESLOPE BANKS TO 2 : 1. , ~r' '; "''':':;)1
TO MAINTAIN ALIGNMENT VOLUME 5. SHADE REDUCTION: HERBICIDE 4. INSTALl LIVE CUT BRANCHES, ~11". : :I"" ",,,=
APPROX.15 FEET WIDE BY 23 FEET DEEP. SHADE PLANTS IN PLACE. SANDBAR WILLOW.- i .::,.;'::~~ :; ij:f' f" ~'~[l1f1
5. INSTALL RIP RAP AT APRONS AND 6,INSTALl UVE CUT BRANCHES AND 5. HARVEST EXISTING SANDBAR ~ ':i 'I!! ,,~ "JIll
I CUT BANKS AT THE DOWNSTREAM HERBACEOUS LIVE PLUGS. WILLOW.
SlOE OF THE TWO 4S" RCPAT347+00. ''', "",'j
6, MAINTAIN SUNNY OPEN, SAND PLAIN 363+50 ' ,
CHARACTER: BURN THROUGH CORRIDOR , ,';' ,";Y'I" ,...~, .. '.'- "~'L:.":' ~:"-.
ON TWO TO THREE YEAR CYCLE. '\~(fi"< > ~":,i' ,.: :',:'...,J...;- .'"
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I 355+00 TO 360+00 360+00 TO 370+00 (RR) , ~', --,~\' Vi -' :., ',;
1.355+00 REFORM PLUNGE POOl AT 1.RIP RAP LOWER 6 FEET OF BANK ON ,,;, ~".J-""'"S:, . " ''', ',- .
DOWNSTREAM SIDE OF WEIR APPROX. CUT BANK. USE EXISTING UMESTONE . ,~Ji\\l'.",l.ii: '
30 FEET x 50 FEET. . , '. -, '~"'i,,,,.,
2 355+00 TO 355+90 REMOVE AS BEDDING AND FACE WITH GRANITE " . '{'~l~';;""J;
S'EOIMENT BETWEEN WEIRS TO KEEP FIELDSTONE. 360+00 TO 362+00. . . ,"",,'" >A"I:,"~,~',
FLOW IN CHANNEL 2. INSTALL LIVE CUT BRANCHES BETWEEN 362+50 I ;
I (15 FEETW x3FEETH x50FEETL) 6 FEET TO 20 FEET FROM BOTTOM OF 'I .' ,,,"''' r. : '..'.', -, , E .
. . .. CHANNEL 360+00 TO 370+00, fi," "w i!:"'W~~\" ","~,<:,\'h" . :
3.355+90 REFORM PLUNGE POOL AT 3. BURN REED CANARY GRASS MATS ,1!.~: ;- :'F.lf",'~~~. .' -,\::::X' '" , i
DOWNSTREAM SIDE OF WEIR APPROX. AND UNDERGROWTH ",f;, ~,' " '," '" " 1 " , .\." ,:,. , ,
30 FEET x 50 FEET. . ~t\~.\-;. "~~ .......: ;-'XI' ~ ~' .." '-I' ·
4. FILL IN SHEET PILING TIE BAC, KS 4. SHADE REDUCTION: THIN MAPLES. :,;~,,',' '~':'f:;,!1;M''''', " --" .' I.,J,"#J, !
NTOBANKS^'TBOTHWEIRSWITH HERBICIDE IN PLACE. .~ "~^,,,""" , ",I""',,~ .
I" 5,362+00 TO 367+00 RIP RAP LOWER '. ::;':-", . ~/r~~~::...>'j)~i\:l'! ! i
I RIP RAP. 20 FEET OF OUTSIDE BANKS <J.,';'" ,.',,' , .,.1j}''''i<>fJM~ ! .
5, INSTALL LIVE CUT BRANCHES AROUND 6 387+00 TO 370+00 RIP RAP LOWER 3 FEET ,;: , ",:; - ,'"" ",~^ . ..,'...~~-;:{' ,':
SHEET PILING AT BOTH WEIRS,' .
6. REPAIR FAlUNG CUT BANKS AT DOWN 370+00 (RR) TO 360 00 l
STREAM SIDE OF SECOND WEIR 355+90. 1 SHADE REDUCTI~N' HERBICIDE i . i
25 FEET Lx 15 FEET H. WITH BOULDERS. BUCKTHORN AND AMERICAN HONEYSUCKLE i ~ ~ ~ ~
I LIVE STAKE BETWEEN BOULDERS. . f g h
7. PLANT RIVER BANK GRAPE ON RANGE 2. RIP RAP BOTH BANKS 3 FEETH. 392+00" ._" 400+00 T040S+00 (END) ~U
FENCE ON SHEET PILING WEIR FACES; 370+00 TO 3S0+00. ."'~' 1. SHADE REDUCTION: AMERICAN ELM. <
B MAINTAIN SAND PRAIRIE MATRIX: BURN , 3. SUPPLEMENT OAK SAVANNA CANOPY ,,' . '$ t.,> _ AND BOX ELDER 400+00 TO 402+00 5j ~
THROUGH COR RlDO, R ON TWO T,O THRE, E,'" WITH OAK SEEDLINGS, ' ' . ~';'~...; l~<i,~, 1 ,~{:.:J,:,1 2. RESLOPE BANK S 402+00 TO 40S~00. , Ii 'J I ',: ! ,:;\""~Wq;T." ,.~. l' I f 'J' !, " h U i
VEARCYClE. . _.... ... .. _ '~: ,"~ 1.5:1.. . .. ~ I ~jj~~1~~:}~fl~I::-;1,{,..~..~:~, ~l\q:~'t!.f~.ri r1.~\' 'I'" H ~
9.RESLOPECHANNELBANKST01.5:1;'- ,. , 3 RIP RAP BOTH SIDES 400+00 TO 402+00 ,', e")l~',~, "/>.' "'''''''' 'I~, ':.,\ 'J",', !1~~.
I.. 0,."," , ' , "" '''.--.1",.,,,,,,, .u"
, ..!'.';;~;. 4 FEET UP FROM BANK TOE AND . :,,,,, "d,'... \;:"" . ' '.' h~~
,\..<t~'~r.~~~~r'\"'Wc-:-: ,VEGETATI"N...__.,., ' ",~.I.':._ ,~<;'l;1 . ...~":.......,:,c-;~~':r~~~:~~..(;;'~,/ E=;~
5. INSTALL LIVE CUT BRANCHES. ' _-;"'."",-,.:"" ".,,~\.,. '''"',', '/,"; " ".",-.1 e~~S
6. INSTALL PLUNGE POOL AT CULVERT ::,:;:",'-"([7.:.;., ,,! ' ~~,,",. ,\";: -- .;>.;,,> ;r~-;;>", ~ ~ H
~'?rfJ;'~..,~~1.<,'~ 390+00 A",! 403+50. _.. .'_._.. '_...'_ ~ .~:~~.:~({~~~:,~,,< :.~< i:?l~~'_.-' .4V''''1'''"':;',~':. m$i:j
I '~.: ~"~l1{ "'~~f,,~ ~< ~ ~< \~. 7. REMOVE SHADE PLANTS-40,5+00, - .,t , :' ..:;~~~t.G:r.1"fJ:!.i;~ t.~.:f" ~~vr...~:.r;t.',~.:.. :'kif4J,~j;7.:,:~l;.... _.!!
"I ' o;'.;:V~p!'~" 'GREEN ASH BUCKHORN REDOAK '. ". "." ,,~,"~, '" M ..
(~ '" / v' ~,~,~'::?t-f!~1~. AND ASPEN:' - -. - - ,
" ;,..,' "~\;(" - '",;ii,JY$iAtf~, S.INSTALlLIVE BRANCHES INTO
- A1T::f'~'.':' '-....--.'ri!-'4l.~,;..-v.,::r1JJi CUT BANKS,
, 'J ::;~~ ;"':;7'6,,...;,...0'{~~,t;1l 8. RIP RAP 6 FEETH. BOTH SIDES <
BENCHMARKELEY..-------.---' . "'-~-':;, . :', ".,"', .<\>:., ,,' '402+00T040a+00. jENCHMArocELEV------ E-< E-<
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0_" . , lI~d \ ~ I ~ ,~_ '\" ~_I I r I 1 I' 1 i j \Y ~"v
;, "-..,,,,~..., "01_ -.... ,= =".-1, ,.1},< ',W, - -.,----r---,-------------l------.--'----T- ----'--."'---- --T-'I-----'-\.....---------' ----------, -,-, EMERCENCYOVERFLOW STRUCTURES PROVIDEOBY -"--, ",' V"/~
:~...~. .. ~Rjr,~fff1~, I' I" I I.. 1"""",,,,- . = 1 I I' I l' I I' I I , ~"I''''''~'U.'I ,'1 '. .
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~ ___ __n_ ,_,_~7_~_,__,~0<-0~_".~..s~~_ 354+00 356+00 ,,_3~__' 36~~___ 362+~ 364+00 _.2~OD',,_,,36B:~ _ :: ..~~_.. _" 372~__374+00.__..,j~~_~00_ ._~38O<-00 .-:.- 382+00 ":-_:,_,~~po _~+OO 388+00 390+00 -,," 392+00 394+00 396+00 39S+00 400+00 402+00
I i:; Plan sod Profile SHEET 12 of 12
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Outlet Box Design Concepts
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PREPARED BY ME OR UNOER MY DIRECT SUPERVISION AND THAT I AM ENGINEERING PARTNERS """'"
~ DULY REGISTERED PROFESSIOIW. ENGINEER UNDER THE LAWS OF 0 1/2 1 MSR PROJEct
THE STATE OF MINNESOT.... I NTERNA TIONAl, LlC ~ , 0<t0<ED RI.IG PRIOR LAKE OUTLET STRUCTURE 4122
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NOT MEASURE I" l'llOJECT lIN<>CER RIIG
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DATE: BLDOIlIHGlON, WINNfSOTA 55437 NOl iO SCAlE 0Alt SHEET Of
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Exhibit 7:
- Current Land Use
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CJ Project Area (100' corridor)
----- Municipal Boundary
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-"" " . ,. ..... J'" ~';''' ~ '"':-..
D~ Industrial ' , 1'1 i3 · - -.) -',
""-',~...,.~.~ ?_.J, _ - ."~~d "--' . . .... _ .~~ 1: "~~'''--:?lf' ~ ,fr "'r ~ _.-s
I I Public/Semi-Public ,;:.);-'~J '~', 0 Vi \ , - ~,[Sy ~,.r;. , t?i' ~.=:;..:.:;;, ,-T"
I ",':''''~ ~ ( '1.i1"~~ .. '../ '; ..:.:.j;"
Ii ~;-:1 Parks & Recreation ~,~f ]"1\,' \',~ " --Y>>'V':'=. .=- __Co l~
"o~,:," ' "\Jt Jeffer's~Pond"" ~ "'_ r ~..----:-:" ."'~ ~
Lake ~'\... 11 \ ' .;:;:;~. "i' _. ~ ~,4
f~ ... ' , I ~ ~ ,0 ~..... 0; 1 --;
I m~ Regional Pond ~; ~-;;,;r' " -, .4,::,;1'-: #"'~'.
~':~'~,','" Wetland I.h.-,~",~~'"i,'\""""r.", ',",',..,~^ priorL, a ke, Outlet :" ,,', " ,'"
R-O-W ~' };, ~ 0, II ,:,1/:7 ~.,j~
I ,= 1 f~ o.:'Ii ...... Jj Lower Prior Lake'~ ":~";,-
L:.J SMSC " ,~r~~~,~i, 'QI',.,',::="~~,,..,,""",ft,; ~',,"~' ,"~[t:,' ",'",,;,;"'-'-,.,", ,<7'11",;;..~',-,.fIl,.,-' -.,:-,~,-r =;,1
'. -"8]';"" - ~,{~ ,;":;,' , ,'S~ " \. 4~ .::.)
Vacant/Undeveloped '=, - -.~ ";; -, ,- ~~ :9- ..sc:t.> -: .~ <:,. ,: .=; -: ..., L
p._ 'II ,,~.. )~. -, .- ~ _.
I ' :f ~ . tr~~(;. ......::: .- 'd . "/ft.:,,~ ~ '\\ ,'%....7
~I ? 2.750 5.500 11 000 Feet N
, I I I I I I I 'I
.",.., Prior Lake-Spring Lake . .
I ,~w"e"hedn;",;ct Exhibit 7 +
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Exhibit 8:
g Future Land Use
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..- .-" - - ~ - ------ -~ -- --- ~-- ---- - --- '"---- --~ ._-- ~- -.-- -..--- --.- -- - --
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Prior Lake Spring Lake Watershed
Future Land Use*
N
A
*SOURCES c=J Subwatersheds
Scott County Comprehensive Land Use
Plan Update, 2001 Commercial
City of Prior Lake ll!1' 7d Low Densitv Residential
Comprehensive Plan, 1996 Industrial
City of Savage High Density Residential
Comprehensive Plan, 1999 1It.~ Lakes
,- "Moderate Density Residential
_\ ,J .d,:.,.,">,:~ W I 1 Mile 0 1 2 3 Open/Agriculture
~~-:__~;."f enc < I I Roads
Exhibit 8
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u Exhibit 9:
Minnesota County Biological Survey Data for Scott County
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i '--..- -,' ',(': -'
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Excerpt from: NATURAL D
COMMUNITIES AND RARE
SPECIES OF CARVER,
HENNEPIN, AND SCOTT
COUNTIES, MINNESOTA
by the
Minnesota County Biological Survey
Minnesota County Biological Survey
Department of Natural Resources
Division of Fish and Wildlife , I
Section of Ecological Services ,,!
500 Lafayette Road - Box 25, St. Paul, MN 55155
I ___ __
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I /Gci.I1k 'gJ / ~J .
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,~AND CREEK TO .sHI~ . (" --,: SP~iN~~AKE ~ CREDIT ~IVER. I,~
J -,' :$'wgnrpI.uk ~ [ TOWNSHIP ',;@TOWNSHIP.-,'_\
-'- j",.J I I." I.... 1 . .
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-,- \ @ rKank,lj)"~ ,.,,'
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',- - I I, symbol key
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-------- --------
--.-----..-----..--.------------...----- ---- -'--"'-'-- -- ------------"-----._.._----~_.._---_.-._--~._---_._- -,._-- -'- .- -.- -
- - - - - - - - - - - - - - - - - - -
NATURAL COMMUNITIES
NatutoIo:ommunllles..._ ofMti".,p_and_thlltlnlemclwithe.ou,lherand tlullr._ emlImunenIln...,. not~yallered bymodemhumanac!lv!lYor~uced~ ::="""
olMti~ 1omt"'0:0.t::1:le unlts. such as "" oak Coree!, aplllrle. ora marsh. thllt multo "'put owr'J'1CI and _ NalUiaIcommWlllleO"'!/l!l<ra!lY dassJIled and "JIb!!I ~~
I\ydrok>~ salls."" ...-diaturbanco~1l8IiuaI ~and~ontl1iil_....~by~nand~hatOIal~ ,Tho Ie 0 lliological
Surwy ..... 01 ...- COllIlrI1D1itle In ean..:; . and ScoIt countles 1m 1D ...w p"""" nfclli>wi!d ~fleld seIeded _ . The d nand
acresgeOleaoh"'-~~~ ..._onthe resu11s~a;:::.z~orr....f"Y.....~mpredo=~thatwere~~ ~em
~:.;~i~520"""or ~~~~~andScolt=":"tlietlmeoll~~ natimdo:omm .,thetbnetheS"'""YWllSCO ucte<L Nahfral
UPLAND FORESTS ~ MakOaks........ Ilr)-mesIo_onmoiolaollsonoulw88h. OpeI:l<>U1OpyOJl:5O'l& _ 1mmadcS_~~"!'I>IlTe. _"YlUO""on""""'Ied~In....n1a>-
DEClDWUS fOREST cme>:)lXIU1J'O"O'I~~burll8lcand nadhemplnoak Amedc:inhueJ, """"th block _ thai .. iiunlm.huii'oIllrom ~ uplarula Coft!lnuous.1lmmr<>cky
""""",PId . ""'...pbenr lRu/alsIIrigciuI) OIemmmon.hrubs. Gro~ =e1l1OllSl!>~ _wampH ~moderalElylddic. Pa~to
~ Oak_-mesltSU~Dry'meskto""k:_ on"""'~ well_ solis on dorohlaiedl1. b1_Muhlinbe!g"sedge 1"""'~Csnada ~domhialed1>r~- Mth_ash,~bhi:h.
~ '_~~and!mbapedes oId1yandmeslc ~ IB .u~Jlx>Amedc:inebll.orml'W.I: 1I~
~tllloron11Odh' 'Iop'esonou__ ~cZ!'iallYdo_byred ~_~=~I~~. __oom;col1UllOll1y g~wlllow I ~.olenderwlllow
08k~ndmIJ' other rtan!CllIlOpylreeslndude rQilemllIllb<J. ~1%g>>1dj"'J. and _wlIIoYi Ground Includes some Of the !en _ pteseI!\
no ~sk~<I=,J.biiill8lc(Qu"",,~.Ind_ and_ptalds_ ( I. lDlDlS1'llll: 5...... en=:'=;;'-:::oei~~=~'"=-withDlO1l!scldk
~~. pY~='=""''4':a~''"''I8;ol.hade-
. ' but h1d"dl::"~coJonize such...~1ddory PRAIRIES ~J~"'= _~iOund.Jes.,,;(I,undew (I)roserrI
~J.blockcherryll'runu>seriJiIUl).~~aspen 1= _ . 10Se Obg>rdc . Appm>dmalo 0*1....., fO.......
, . ShrublaJ'!r.pa,meandCO!1llJlOll1y ~bemes ( 'PPJand tl1'LAND I'llAIlUE SHRUB WIlI'LANDS
(l'runu> ' 'iDiu>), Ground shade-Io!emnt herbS oiuc:h...
=-Jes.VedtU:l;-~(lltsmalhansl.J:l:m~~ (Gmmium""",IIlfumJ. ~ IlIyl'lldrle.bm....utm>e. ~on~_soiIsonwindblown SHRUB SWAMP
(o=(=f."~~ct~~:~~Iot8l..... oaridd.....o._~tbe _ Domlimnt.,.r.:::arellltle l>Iu.-" Iune
==.,..~~P."'"~~ r=r4i<J. _ 1'/Ill....S_-s~onSlllut8ledmlnerslorshallowO'l'}lUksoilin__
2./111I....... _.n1J1~sdrweiIf/biI).sancI~~ I.and
~ OaIcPo_od1ya- Illy_typll:aI1yon_. !lrYaollsill1l1l!din ~c.t,-~~~~~~=~ ==f;..s""'-ooIer~2..:rand~~~=
car"::''':i .;.:..=:'.;,,~.=-:...,~-:......~~ ~nlY.:'"'~~ indudeJl8jly)>esdgmsll (1lzrj;1jlum ioliftiiumJ. snaI<e ~zl:in wetmeadowormbel emergentDU!l!lhccammmitiE:s. ~1Dtal
suppresslon; lh... have<otlllnuous butollenlhla~~ ol~_ lleell, _(l'io<IidtI4 ~clmer ~oIlloslIIIiJ.westem ~ S:eeP<8eSbmbs.....p. w.t, .hru1>domInaledlXlII1llllJl1llon=~
=-~_by.m_oIbur no~oak;andWbiteoal;. ~(TholilonmIicr' .andm<kspll<enmM (~".potrisJ.
Ies<erlll11OlD1l>ol== == andmloak Shrub ppm>clmate __ 4D..... ~OatumIed~~~Cr~= ~ bybog
=~!~~~~J glllybiiIioa,..a~ ~ lM'1'IlIlrIe-Jancl~ou~~orilewlto*"P lemIlnonJanclyoutwash =~~pntit<tfJ,_,edgelcrrlrid<<).and4
(l/ibrlrmmI~, G~~t_ofinod_toheavy :C~=D\1 -'~~ii!: ...~ ApPioxImaie~~~olW:areous_!enand welmesdoW
shadeanddiy .ucll.._ &olderim<! rs uIml~hog-~
~_ ..hinlngbedstraw (GIllIum""""""",,.e shtiiIial (= =.(S=:.=s.!m:.~::pl'r'=~ .
.;roPennsylwnlased8" (OIm~, ApproxlIrla 1oIal.....1 ....... pur~-J'=:r~ l.whl1e:;&" OPENW1!TI.ANDS
~ MapJe.._ Porlot. MeslcIo......-mesI:: _ 011 molstsollsfcaned In gIads1 tlllor (-. ._ I'!"""!'!! (IJ/~iIrdsumJ.~lOIrIeblnl' IlMIlKGBNTMA1ISH
OllOOO~ north.fad!1g~onoutwash_ Dense~bYsuguD\lple, vlolet(V/ollJ~._(~l<mgl/lllal.and beD (~7llIundI~.
besswood, and ml...... WIth ksserlll11OUl\laol.=:eJm rvlmrI. greea ash Approodmatil ..... 530....... ~ _1lmrspI_~ flooded 1YeIlonds on mlnersl or shaIloworgank solis at
~.and blackssh (l'm1nuJ , Au-.eJm rw""" l:1!!ij ~1'IlIlrIe_hlD'~Iodry-mesIo=onwel1-dmfnedsollsonsJo~
wsa once commonln the amopy but III ~ jl)daymoslly as .~ead * ~,,=~'~'~=r."i=~.=-
* ~~~~~~n=.~~~~reom:'- onglodaltllL _are bluestem. slde-oaIs-. =
o/rernIftlIlI).red-benied~r rs-~.orc...- ~~- pol<1jplne~~ Typbllotbslndude=.ll1Oke ~ lriftmlmJ. (~~~::'~r'(~:=~'~grasa
esrly ephememl8J>ede'!.ucllas _. ID-'" .faJse_ ~~.~E~J.~sn:ttlJler p_ arebroad-_anowhead (~loIifi>IiaJ. WllIerplaalaln (Afisma
snemoae _.1oothwo1t (l)mt1lria_J. andwhl1etm
~lIwJJlothercommonhed>oOleP_~tod"""slw:le. aswhl1e ~s,weotfIsg(__ ._palllnlp (SIuni_.wtldmlntIMmlha
. _ (GlycyrT1lIt# . Appnixlmate _10......
I MP I _k:l'IlIlrIe'l'lIIl%fl!eonmolslsonollewllo.haIJowly~lemIlnllll~tlllor "",.".,. __-homI1oUIid IlPl"."''''''iaoPlsJ. Appmx!maIe~.....
~(OImllllMslnRJ.~rool==h~ .=_ 9,140......
(~~.M14Jeek' _J.and "'lIgoIdemod (~ outwash. IlomInanl_arel!l&l:IuesIem,== ~~eeecI; common ~ CaltIIlIManh. Open. flood"" wetIsI1ds on_or shaIIoow:: soil in sbaIIowbasln5
~450"';"" .. ss....",,) species """,entln....u:oak_ ~ lDlDl..... ass<>d8fed~lndude_~ .panJ(: (Illniaim~and
=r.:(-~J. -= _~coneIIower ( ~=~andn:==.~1afj :g,.,.~~
~ ' .hesrl-_a!eiiandeoI . 6JI.mrI ~UolrisUgull#isandr.
LowI.mdHanI__. \'kHaesicbo-.laud_on.....,~Slllut8IedsDuvlal ~purp"'pmirlec:laoe;and~ ~ ,ApPmxhiIatelol8!..... ty!'ews;.';:.=_twbere""I~=les(>160""")""'P_or.. ft
sonabownormslfloodWw:l8In.DllIIl vs1Ieys, C'!11OP1and ~byarty was"" mmpone<ll 01 a """",Jes.0l 0:0_) Appriiodmatelolaluea:
_01 basswood, blackash,_SS~ebII. (CdIis 1,lIlIO......
_J.I1or~~1e. Grouad olIendomlnaled~CJes."" (G"ium FORESTED WETLANDS WETMIlAOOW II'I!N
Iq'lrin.,. VDginla. .woudi1ettle :<llll<tdmeisJ.and mxwmwleaf
~o..i~ ... IurslloJ; also .. ~herl>oceausp_ present In FLOODI'LAlN 1OBl!ST ~~:l F.~4=';;~E~~..r-
map __ AppiOxima"Iol8!uea: 310......
DECIDUOUS WOODLANDS I SAVANNAS _ l'loodplala._-sUWllll"PJeoublJpe' LowIand_onlleaSD1lSllyfJoodedaI1uvial
sonon__~_ ~consl8lsolalsll,__ osler ogwOocI~ 'fn>lcal it1dud~~._
(H</mbliiloulfniilulkJ ~mo_ J.New
DEClDWUS WOODLAND ~-=~~~~~eIm, _ (tlJIer..........su.<i.and greoIlobella sI1*llilIOI). Approximate 10ta1~
~ Ollk_-BtasIrIancI. ~woudJancIs onwell_. drr.tomesk:salls_on ~and - (s.iIx =a';' Shrub..~or 12ll aaea.
_~Z~~~=..~~. -
==rglads1rl__ o!IenOllsoulh-towaHacmg.\OP<a ~ 10 ~, _Mead..... ~wetJondson~.""'!ftlSIIy:fIooded_or~sanln
sndIorWhife~~~~~~aslem":.~ gmss rLMni<tllirg/nIo1J. and_narrowlOii Afpm>dD1aIeIol8!S1'IlIl: 1,9JlJ....... 'haIJow=~=,,"~:~::~~ -and
(prnI' . . basiwOod, and Shrub oIlen HARDWOOD SWAMP fOBl!ST ~grasa,common~:Include1xtrft!ed, .~~h
~eand~~1wel (9)!YIU6 .~prlcldmrash ~ Mbed_S~ Lowland_onSlllut8ledmlnerslor.haIJow9fJ!'Il!csoilln (SdiplIs _.J. and squali!:sedge ~J. Clu!aPsol.hrubs ale COlllI11OIland
(Zmlhtttjum"""'"""'"'. smoothllllJDSC (RhiI~ and~~ GroUnd layer ~~Ih ~:r,~~~Common~'"
spedes Ole slmiIsr to those 01 oak_ -!hY' bUt also e praItis .peele. In shallow I:uins ~' oroutwash. Canopy clominaIed l>J: bla<k ssh with a mlxol
~~~u~:=='~~="IaV8l1M_l!umpean otherlowland -.I spedea,indu~8"""!ash, mlmsple (Aar~~ nortbem ma1'IIh~ Am.elkan ~hoieJiound. ~JtIJ!D'icmata) I and Labrador '
~~~~~~;td;~:..~, .Ied..,.,.. be<Ilfnw(Gol1um~, Appm>dmaIelDlDl_ 1.mo......
- Aapen __. \\lot towet-meai< woodJandln pIlOdy dndned~ depresslons 011 GroundJs.Y\'!_.Jf:"'~oI..,&nd$SS- ~.ppJ. ~ Cakor<auo~lIoa-~...~. ~Ollmganlcsoilon.light~
=:r~~~~Wh~~amounIs~~~~ ~eclrI1(O=~J.~~'<Gr .~lnSIShfeili thlltareCOl1liauouoly_l>J:_1IiI1g gmupd...... ShaIIowdOmes peat
wllh.D18lI. ~lsare=lii""'Ol~gtOundWlllerfJow DamIrnmt
~ Shrub~oIlend""arid~willaws(~ Sa/i%_and ~~~=~",r.='~ld(OiJ"'~=~ =: . JlIlli!io> sterile sedge (Oueiill<riHo). tussocksedse. hanIsIem
""'~ and 'osierdogwood (CmKus ~J, Groun Jayor.lmilar 10 "'" Appm>dmate~_ 350...... ~marshmuhlJ_ (~~D17IdOf4), Low.hrubs...oftencommml.
pmlrleor.........ow: Approxlmatelol8!..... 7Il...... - ~~J-~~k~':.~=-...&::;~at and ~==~ I ~~lmcl1,~co~~
DEClDUOllS SAVANNA c.-~whJclL...mre~~=these~m:'"
~ !JrfOakS........i>mens...b!Jpe. ~Oll_t,.d1sln<dsollsonwind. mocIe_~.....anddomlnsled~ byblacltash. butbesswood, red~le. ~"". ~.sa(G~. .-
Cash, .iMr_leare......r,::: ~hNbs...=and ~lndudewtld !lllmHJ~deII'.goldenmd rld4<IIBJ. .plI<e-rush(_......,.
bbwnsond dUlU!S on """"""aJo!ilg the m.... O~ ~5(l%co.er) ~~~.~~~ and '" nut-rash (Sd<rl. 11). Appm><lmalO Iol8! _ 12ll acres.
* =:~r;;1:='"r:'l8iul~l:~e'~.~" ~J. bluellsg (Irls~J. rnarsI1.'ft1lIdgO clearwel.l (Pf/easpp.J. andiow _ l'oo1Fen~~- OP!'I\ wetlandaon.slUmIedCln.DllIIl- that_
l'OundJayerdominsledJrfurb! ~ gmmlnolds typll:s101d1y ptalds. _ subtyp.
Appm>dmite 1ol8!uea: ....... _ Apprcodmale O*IS1'IlIl: 10...... ~l11OSll:;'~bs=~g~~~=~
~ DryOaks..uma'_-sralOl.ubjwe- DqSOVll1U1&onlewlto_~_on CONIFIlR SWAMP IOREST WllIOi< Sj!dges. ~ wlregrass sedge andlsrge ~... aburuIanl; _
~ 1mmadcS=._phl<.abIype. R>_~on..turaledmucl<orput J!WlYofthe same add-~.peaes presenlln tsmiirack swamp' sphsgnum.ublyp.
~dminedJanclYOollsongliaal__ Opencanm( -) Appio>dma"lDlDlS1'llll: 30.-.
of openj\tOWJ\ burll8lcor11Orthem pin os!<; easlemred oedar III olb!nabUndenlln InsmaIllee- _ 5~ mosse.o....1ImIled 1o.m;:~ Inaddk:
sIteS theI have not 1>m>ed recenIl)' Smooth """""" leadplant, pmlde rose. and Au-. mI:roha~suohas on~ ~ Surface_tH addIctodn:umneuIIaL ~COMMUNIl'lJlS
phun (l'runu>"""'*""'" ....COlJUl1OIIshrubs. Gl'O~doinlnoledml:ii_and
g,.mInold.s typlca1 01 d1y praIrle . sand-gntwl subtjpe. pm>dmate "'"'" ZlD acres. ~Cash, ola~~::~ ~~=:m.~ filii RodcO""""l" Spalll'\y__communItIesonohallow~on_=:
10111Od'-~sluube ~~ .J::PrAlnuoni8'!"Je -os~dogwo<l!l.
=-~~J:.iand~=,='::-layer.=m ~~~E~::'='~=-"~~~ ...
li!niss<idates;ucll.. Iirclt (B<tu14 . (0Im. (-- . ICW'f1!S._,J. _.n1J1=C"'mCr.
tussock.~~._St~ =:fro6iriJ.and~
twayIlIade ' lo<sdI/IJ, Appm>dmalo totsl..... 3ID acres. !iir..:t=;==~~~I11OSl~bere
. . .'~ Areasoldeepestsonhaved1yplOlrle-sand-gntwl~ App_
~---_._._-" --._- --_.~~_., -_.~
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Exhibit 10:
0 National Heritage Database Review Results
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I Exhibit 10
I Minnesota Department of Natural Resources
Natural Heritage and Nongame Research Program, Box 25
I 500 Lafayette Road
St. PauL, Minnesota 55155-40_
Phone: (651)296-7863 Fax: (651) 296-1811 E-mail: sarah.hoffmann@dnr.state.mn.us
I
April 15, 2004
E Shannon Lotthammer
Prior Lake - Spring Lake Watershed District
m 15815 Franklin Trail, Suite 100
Prior Lake, MN 55372
m Re: Request for Natural Heritage information for vicinity of proposed Prior Lake Outlet and Channel
Improvement, T115N R22W Sections 3,10,13-15,23,27, & 35, Scott County
NHNRP Contact #: ERDB 20040670
m Dear Ms. Lotthammer,
m The Mii:mesota Naturai Heritage database has been reviewed to determine if any rare plant or
animal species or other significant natural features are known to occur within an approximate one-mile
.. '. radJus of the area indica~ed on the'map enclosed wi~ your information request. Baseq. Qn this ~eview, there
,.. .. " ., ar~'34,kD.own ci~currenc~s'ofrare species ornatiU:al conmiunities in the,arell s~atched"(for detaiI~., see .'
m ' ',' , enclosed database printout and explanation ofse1ected 'fields). Howeve1:: based on the nature mid location
.., of the proposed proiect I do not believe it will negatively affect any knoWn occurrences of rare features.
The JIlatural Heritage database is maintainea by the Natural Heritage and Nongame Research
m Program, a unit within ~e Division ofEcolbgical Services, Department of Natural Resources. It is
continually updated as new information becomes available, and is the most complete source of data on
Minnesota's rare or otherwise sign~cant species, natural communities, and other natural features. Its
D purpose is to foster better understanding and protection of these features.
Because our information is not based on a comprehensive inventory, there may be rare or
otherwise significant natural features in the state that are not represented in the database. A county-by-
0 coUnty survey of rare natural features is now underway, and has been completed for Scott County. Our
information about natural communities is, therefore, quite thorough for that county. However, because
survey work for rare plants and animals is less exhaustive, and because there has not been an on-site survey
0 of all areas of the county, ecologically significant features for which we have no records may exist on the
project area.
The enclosed results of the database search are provided in two formats: index and full record. To
0 control the release of locational information which might result in the damage or destruction of a rare
element, both printout formats are copyrighted.
The index provides rare feature locations only to the nearest section, and may be reprinted,
U unaltered, in an Environmental Assessment Worksheet, municipal natural resource plan, or report
compiled by your company for the project listed above. If you wish to reproduce the index for any other
purpose, please contact me to request written permission. Copyright notice for the index should include
the following disclaimer:
g "Copyright (year) State of Minnesota, Department of Natural Resources. This index
may be reprinted, unaltered, in Environmental Assessment Worksheets, municipal
natural resource plans, and internal reports. ,For any other use, written permission is
a required."
The full-record printout includes more detailed locational information, and is for your personal use
DNR Information: 651-296-6157 · 1-888-646-6367 · TTY: 651-296-5484 · 1-800-657-3929
m An Equal Opportunity Employer 0 Printed on Recycled Paper Containing a
Minimum of IO'k Post-ConsumerWuste
I
only. If you wish to reprint the full.record printouts for any purpose, please contact me to request I
written permission.
Please be aware that review by the Natural Heritage and Nongame Research Program focuses only I
on rare natural features. It does not constitute review or approval by the Department of Naturiu Resources
as a whole. If you require further information on the environmental review process for other wildlife-
related issues, you may contact your Regional Environmental Assessment Ecologist, Wayne Barstad, at I
f" (651)772-7940. Thank you for consulting us on this matter, and for your interest in preserving Minnesota's
I rare natural resources.
, I
; Sincerely,
, 111. fJ,eAlv,-
r
nr I
Sarah D. Hoffmann
Endangered Species Environmental Review Coordinator I
end: Database search results
Rare Feature Database Print-Outs: An Explanation of Fields I
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PRIOR LAKE OUTLET & CHANNEL IMPROVEMENT
Minnesota Natural Heritage Database T11SN R22W SEC. 3, 10, 13-1S, 23, ,27, 3S, SCOTT COUNTY 10:37 Wednesday, APRIL 07, 2004 1
Element Occurrence Records MnDNR, Natural Heritage and Nongame Research Program Copyright 2004 State of Minnesota DNR
TWP RNG PRIMARY FED MN S RANK ELEMENT and OCCURRENCE NUMBER MANAGED AREA
SECTION STATUS STATUS
T1l4N R22W 02 THR EMYDOIDEA BLANDINGII (BLANDING'S ,TURTLE) #37
TllSN R21W 07 S2 DRY OAK SAVANNA (SOUTHEAST) SAND-GRAVEL SUBTYPE #4 MINNESOTA VALLEY NWR
TllSN R21W 07 NON LAMPETRA APPENDIX (AMERICAN BROOK LAMPREY) #101
T11SN R21W 07 MUSSEL SAMPLING SITE #139
TllSN R21W 07 SPC PITUOPHIS CATENIFER (GOPHER SNAKE) #98 MINNESOTA VALLEY NWR
TllSN R21W 07 NON REITHRODONTOMYS MEGALOTIS (WESTERN HARVEST MOUSE) #30 MINNESOTA VALLEY NWR
TllSN R21W 18 GROUNDWATER PROCESS (HOLOCENE) #2
TllSN R21\q 18 SPC PEROGNATHUS FLAVESCENS (PLAINS POCKET MOUSE) #20
TllSN R21W 18 SPC PlTUOPHIS CATENIFER (GOPHER SNAKE) #10
TllSN R21W 18 SPC PlTUOPHIS,CATENIFER (GOPHER SNAKE) #105
TllSN R21W 18 S3 WET MEADOW #78
TllSN R21W 19 S3 POOR FEN SEDGE SUBTYPE #22
TllSN R22W 03 LT SPC HALlAEETUS LEUCOCEPHALUS (BALD EAGLE) #1683 MINNESOTA VALLEY NWR
TllSN R22W 11 S1 DRY PRAIRIE (SOUTHEAST) BARRENS 'SUBTYPE #12
T115N R22w 11 SPC OENOTHERA RHOMBIPETALA (RHOMBIC~PETALED EVENING PRIMROSE) #19
T1l5N R22W 11 SPC PEROGNATHUS FLAVESCENS (PLAINS POCKET'MOUSE) #21
T1l5N R22W 11 SPC PlTUOPHIS CATENIFER (GOPHER SNAKE) #99
TllSN R22W 12 SPC SPEYERIA IDALIA (REGAL FRITTILARY) #40
Tl15N R22W 13 THR BESSEYA BULLII (KITTEN-TAILS) #121 EAGLE CREEK AQUATIC MANAGEMENT AREA
T11SN R22w 22 S2 MAPLE-BASSwOOD FOREST (BIG WOODS) #134 PRIOR LAKE RESERVATION
T115N R22W 27 S2 MAPLE-BASSWOOD FOREST (BIG WOODS) #131
T1l5N R22W 33 S2 MAPLE-BASSWOOD FOREST (BIG WOODS) #133 SPRING LAKE REGIONAL PARK
T115N R22W 36 SPC BUTEO LlNEATUS (RED-SHOULDERED HAWK) #200
T1l6N R22W 33 SPC GALLINULA CHLOROPUS (COMMON MOORHEN) #20
T116N R22W 33 SPC PlTUOPHIS CATENIFER (GOPHER SNAKE) #101
T1l6N R22W 34 COLONIAL WATERBIRD NESTING SITE #52 MINNESOTA VALLEY NWR
T1l6N R22W 34 S2 DRY PRAIRIE (CENTRAL) SAND-GRAVEL SUBTYPE #111
T116N R22W 34 LT SPC HALIAEETUS LEUCOCEPHALUS (BALD EAGLE) '#1442 MINNESOTA VALLEY NWR
T1l6N R22W 34 MUSSEL SAMPLING SITE #137
T1l6N R22W 34 SPC PITUOPHIS CATENIFER (GOPHER SNAKE) #102
T116N R22W 34 NON REITHRODONTOMYS MEGALOTIS (WESTERN HARVEST MOUSE) #2
T1l6N R22W 3S COLONIAL WATERBIRD NESTING SITE #846 MINNESOTA VALLEY NWR
T116N R22W 35 S2 DRY PRAIRIE (CENTRAL) SAND-GRAVEL SUBTYPE #88
T1l6N R22W 35 SPC STERNA FORSTERI (FORSTER'S TERN) #34 MINNESOTA VALLEY NWR
RECORDS PRINTED = 34
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PRIOR LAKE OUTLET & CHANNEL IMPROVEMENT
Minnesota Natural Heritage Database Tl15N R22W SEC. 3, 10, 13-15. 23, 27, 35, SCOTT COUNTY 10:37 Wednesday, APRIL 07, 2004 1
Element Occurrence Records MnDNR, Natural Heritage and Nongame Research Program Copyright 2004 State of Minnesota DNR
T114N R22W ON02 SCOTT COUNTY, MN
Element: EMYDOIDEA BLANDINGII (BLANDING'S TURTLE) #37 Last Observed Date: May 1982 DNR Region: 6
State Status: THREATENED Wildlife Area: 605
EO Size: EO Rank: CUrrent Status: Intended Status: Quad Map: PRIOR LAKE (Tl6B) Forestry District: 613
Site: site not named or no record Latitude: 44 42' 52" Long: 93 25' 44"
Ownership: Owner unknown Precision: within 0.50 mile
Managed Area(s): not managed or no record
Source: FRANKLIN,A. (DNR GREEN SLIP) Voucher: Verification: sight or sound rec.
B~DING'S TURTLE. 1 MALE, 2.06 KG. CARAPACE LENGTH 24.13 CM, WIDTH 15.24 CM. PLASTRON LENGTH 24.76 CM, WIDTH 12.07 CM.
Tl15NR21W SENW07 SCOTT COUNTY, MN
Element: DRY OAK SAVANNA (SOUTHEAST) SAND-GRAVEL SUBTYPE #4 Last Observed Date: 30 June 1995 DNR Region: 6
S Rank: ,S2 Wildlife Area: 605
EO Size: EO Rank: C CUrrent Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: WILKIE & RICE LAKE UNITS CBS Site #: 5 Latitude: 44 47' 7" Long: 93 23' 42"
Ownership: U.S. Fish and Wildlife Service (National Wildlife Refuge) Precision: approx. boundaries have been determined
Managed Area(s): MINNESOTA VALLEY NWR
Source: HARRIS,F. (CO BIOL SURVEY 1995) Voucher: Verification: verified
SAVANNA ON LEVEL TERRAIN ON SANDY TERRACE WITHIN MINN RIVER VALLEY. SCATT'D OPEN-GROWN QUERCUS MACRO. ABUNDANT RHUS GLABRA 0.5 M TALL. PORTIONS DOM'D BY
NATIVES: PAN I CUM CF LANUG, ANDROPOGON GER, KOELERIA, SCHIZACHYRIUM & BOUTELOUA HIR. HEAVY INFESTATION OF EXOTICS: EUPHORBIA ESULA CODOMINANT & MODERATE POA
PRAT THROUGHOUT. & SOME AGROPYRON, BROME. NICE DIVERSITY OF NATIVE PRAIRIE SPP PRESENT. DIST'D BY PAST GRAZING & RECENT MOTORCYCLE USE. NEEDS FIRE.
Tl15N R21W NESE07 SCOTT COUNTY, MN
Element: LAMPETRA APPENDIX (AMERICAN BROOK LAMPREY) #101 Last Observed Date: 29 May 1994 DNR Region: 6
State Status: No Legal Status Wildlife Area: 605
EO Size: EO Rank: CU:trent Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: EAGLE CREEK CBS Site # :,3 Latitude: 44 46' 46" Long: 93 23' 0"
Ownership: Owner unknown Precision: within 0.25 mile, confirmed
Managed Area(s): not managed or no record
Source: SCHMIDT,K.P. Voucher: JFBM Verification: verified
1 SPECIMEN COLLECTED IN EAGLE CREEK IMMEDIATELY UPSTREAM OF THE HWY 101 BRIDGE.
T115N R21W NE07 SCOTT COUNTY, MN
Element: MUSSEL SAMPLING SITE '#139 Last Observed Date: 25 August 1989 DNR Region: 6
Wildlife Area: 605
EO Size: EO Rank: CUrrent Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: ONR RIVER MILE 15.4 SITE 55 CBS Site #: 5 Latitude: 44 47' 7" Long: 93 22' 44"
Ownership: Owner unknown Precision: within 0.25 mile, Confirmed
Managed Area(s): not managed or no record
Source: BRIGHT,B. (MUSSEL SURVEY OF, MINNESOTA RIVER) Voucher: Verification:
ACCESS IS AT THE END OF MN RIVER VALLEY REFUGE SERVICE RD., AT CONFLUENCE OF EAGLE CREEK. TIMED SEARCH: NO MUSSELS FOUND. GRID SEARCH; LIVE SPECIES: 1
LEPTODEA FRAGILIS; DEAD SPECIES: TRUNCILLA DONACIFORMIS.
PRIOR LAKE OUTLET &. CHANNEL IMPROVEMENT
Minnesota Natural Heritage Database Tl15N R22W SEC. 3, 10, 13-15, 23, 27, 35, SCOTT COUNTY 10:37 Wednesday, APRIL 07,2004 2
Element Occurrence Records MnDNR, Natural Heritage and Nongame Research Program Copyright 2004 State of Minnesota DNR
T115N R21W SENW07 SCOTT COUNTY, MN
Element: PlTUOPHIS CATENIFER (GOPHER SNAKE) #98 Last Observed Date: 28 July 1997 DNR Region: 6
State Status: SPECIAL CONCERN wildlife Area: 605
EO Size: EO Rank: CUrrent Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: WILKIE &. RICE LAKE UNITS CBS Site #: 5 Latitude: 44 47' 5" Long: 93 23' 30"
Ownership: U.S, Fish and wildlife Service (National Wildlife Refuge), precision: within 0.25 mile, confirmed
Managed Area (s): MINNESOTA VALLEY NWR
Source: HALL,C. (CO BIOL SURVEY 1997) Voucher: Verification: verified
19 BULLSNAKE EGG SHELLS WERE COLLECTED AT THE RICE LAKE UNIT. THE SHELLS WERE ON THE SURFACE OF SANDY SOIL IN GRASSLAND HABITAT WITH SCATTERED OAKS AND
SUMAC. THE HATCHLINGS APPEARED TO HAVE EMERGED SUCCESSFULLY WITH NO PREDATION.
Tl15N R21W SWNW07 SCOTT COUNTY, MN
Element: REITHRODONTOMYS MEGALOTIS (WESTERN HARVEST MOUSE) #30 Last Observed Date: 21 August 1997 DNR Region: 6
State Status: No Legal Status Wildlife Area: 605
EO Size: EO Rank: C CUrrent Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: WILKIE &. RICE LAKE UNITS CBS Site #: 5 Latitude: 44 47' 9" Long: 93 23' 41"
OwnerShip: U.S. Fish and Wildlife Service (National Wildlife Refuge) , Precision: within 0.25 mile, confirmed
Managed Area(s): MINNESOTA VALLEY NWR
Source: NORDQUIST,G., ENGELHARD,M. &. BUCK,W. (CO BIOL SURVEY 1997) (MKE-97060) Voucher: JFBM Verification: verified
TWO ADULT MALES IN BREEDING CONDITION WERE TRAPPED DURING 1997 MCBS SURVEYS., ALTHOUGH THIS SPECIES IS THOUGHT TO OCCUR REGULARLY IN GRASSLAND HABITATS IN THE
METRO AREA, THIS SITE WAS THE ONLY LOCATION WHERE THIS SPECIES WAS DOCUMENTED. HISTORICAL SITES ELSEWHERE IN THE REGION FAILED TO CONFIRM THE PRESENCE OF THIS
SPECIES. MAINTENANCE OF DRY, OPEN GRASSLAND HABITAT IN THIS AREA SHOULD HELP TO ENSURE THE PERSISTENCE OF THIS SPECIES.
T115N R21W SWNW18 SCOTT COUNTY, MN
Element: GROUNDWATER PROCESS (HOLOCENE) 112 Last Observed Date: 1972 DNR Region: 6
Wildlife Area: 605
EO Size: EO Rank: CUrrent Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: EAGLE CREEK CBS Site #: 3 Latitude: 44 46' 13" Long: 93 23' 50"
Ownership: Owner unknown Precision: within 0.50 mile
Managed Area(s): not managed or no record
Source: SCHWARTZ AND THIEL 1954 Voucher: Verification:
BOILING SPRINGS. 1030-1080 GPM SPRINGS THAT INTERMITTENTLY SURFACES. IN SANDY, DAMMED POND ON FARM 0.9 MI W OF HWY 13. FROM ORD PRAIRIE DU CHIEN GROUP, MAYBE
RELATED TO BEDROCK VALLEY TO S.
T115N R21W SENE18 SCOTT COUNTY, MN *** REPORTED DESTROYED ***
Element: PEROGNATHUS FLAVESCENS (PLAINS POCKET MOUSE) #20 Last Observed Date: 25 June 1997 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 605
EO Size: EO Rank: D CUrrent Status: Intended Status:, Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: EAGLE CREEK CBS Site #: 3 Latitude: 44 46' 14" Long: 93 22' 55"
Ownership: Owner unknown precision: ,within 0.25 mile, confirmed
Managed Area(s): not managed or no record
Source: NORDQUIST,G., BUCK.W. & ENGELHARD,M. (CO BIOL SURVEY 1997) (WSB-97003) Voucher: JFBM Verification: verified
SINGLE ADULT FEMALE TRAPPED DURING 1997 MCBS SURVEY. PREVIOUS 1995 SURVEY BY U OF MN TO ASSESS ECOLOGICAL IMPORTANCE OF EAGLE CREEK AREA REPORTEDLY CAPTURED 5
INDIVIDUALS, HOWEVER NONE WERE KEPT AND THE IMPORTANCE OF THEIR PRESENCE HERE WAS NOT CONSIDERED IN THE EAGLE CREEK CONSERVATION PLAN. THE OLD FIELD HABITAT
SUPPORTING THIS PEROGNATHUS POPULATION WAS SCHEDULED FOR DESTRUCTION AUGUST 1997 IN PREPARATION FOR A BUSINESS PARK. THE POPULATION IS PRESUMED DESTROYED.
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Minnesota Natural Heritage Database T115N R22W SEC. 3, 10, 13-15, 23, 27, 35, SCOTT COUNTY 10:37 Wednesday, APRIL 07; 2004 3
Element Occurrence Records MnDNR, Natural Heritage and Nongame Research Program Copyright 2004 State of Minnesota DNR
Tl15N R21W 0718 SCOTT COUNTY, MN
Element: PITUOPHIS'CATENIFER(GOPHER SNAKE) #10 Last Observed Date: 06 May 1954 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 605
EO Size: EO Rank: CUrrent Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) ,Forestry District: 613
Site: EAGLE CREEK CBS Site #: 3 Latitude: 44 46' 31" Long: 93 23' IS"
Ownership: Owner unknown Precision: within one mile
Managed Area(s): not managed or no record
Source: LIEBROCK,E. Voucher: 1432 JFBM Verification: verified
1 SPECIMEN COLLECTED NEAR THE EAGLE RIVER IN SAVAGE. (PREV COLL: 1 SPECIMEN COLLECTED 2 MILES WEST OF SAVAGE NEAR BEAR CREEK ON 5-15-1950, 1671; ONE
SPECIMEN COLLECTED IN SAVAGE, 438.)
TllSN R21W NWNW18 SCOTT COUNTY, MN
Element: PITUOPHIS CATENIFER (GOPHER SNAKE) #105 Last Observed Date: 10 July 1997 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 605
EO Size: EO Rank: CUrrent Status: Intended Status: ./ Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: GLENDALE 18 Latitude: 44 46' 22" ,Long: 93 23' 40"
Ownership: Owner unknown ' Precision: within 0.25 mile, confirmed
Managed Area(s): not managed or no record
Source: POLOMIS,T, (DNR) Voucher: Verification: sight or sound rec.
ONE INDIVIDUAL, GREATER THAN 4' LONG, ENCOUNTERED WHILE CLEANING UP AND REMOVING SILT FENCING FROM EAGLE CREEK AQUATIC MGMT AREA. PRAIRIE GARTER SNAKES AND A
REDBELLY SNAKE ALSO FOUND IN THE AREA. SNAKE WAS HANDLED AND MOVED TO AREA NEARER EAGLE CREEK, WITHIN THE AMA.
T115N R21W ONSE18 SCOTT COUNTY, MN
Element: WET MEADOW #78 Last Observed Date: May 1995 DNR Region: 6
S Rank: 53 Wildlife Area: 605
EO Size: EO Rank: C Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: EAGLE CREEK CBS Site II: 3 Latitude: 44 46' 2" Long: 93 22' 54.
Ownership: Private Precision: approx. boundaries have been determined
Managed Area(s): not managed or no record
Source: HARRIS,F. (CO BIOL SURVEY 1995) Voucher: Verification: verified
WETlJ\NI)S DOM MOSTLY BY CAREX LACUSTRIS & CALAMAGROSTIS CANADENSIS. INCLUDES AREAS CONTAIN~NG MUCH CAREX STRICTA, PHRAGMITES, OR SHRUB THICKETS. MODERATE SPP
DIVERSITY, INCL SOME SEEPAGE WETLAND PLANTS. PHALARIS HAS INVADED SMALL AREAS DIST'D BY CONSTRUCTION OF A DUGOUT, DEPOSITION OF SOIL HASHED DOWN FROM UPSLOPE,
OR BY PAST GRAZING. ~1UCH GROUNDWATER SEEPAGE IN PARTS. LOCATED ON SlIALLOW N-FACINGSLOPEON S EDGE OF MINN RIVER VALLEY. AT READ OFE BRANCH OF EAGLE CREEK.
T115N R21W SENE19 SCOTT COUNTY, MN
Element: POOR FEN SEDGE SUBTYPE #22 Last Observed Date: 27 September 1996 DNR Region: 6
S Rank: S3 Wildlife Area: 605
EO Size: EO Rank: B Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: SAVAGE 19 CBS Site II: 64 Latitude: 44 45' 14" Long: 93 22' 52"
Ownership: Private Precision: approx. boundaries have been determined
Managed Area(s): not managed or no record
Source: HARRIS.F, (CO BIOL SURVEY 1996) Voucher: Verification: verified
FEN ON THICK SPHAGNUM MAT SURROUNDED BY MOAT. DOM BY VACCINIUM MACROCARPON & CAREX LASIOCARPA. EXCELLENT SPP DIVERSITY. POWER LINES & OLD CATTLE FENCING
CROSS SITE ALONG HALF SECT LINE. SURROUNDING TERRAIN IS DIST'D. FORMERLY GRAZED, BUR OAK SAVANNA NOW. BEING FILLED WITH HOUSES. LOCATED JUSTW OF HWY 13 IN STEEP-
SIDED BASIN IN PRIOR LAKE MORAINE TILL. o .5 MILE SOUTH OF MINN RIVER VALLEY. SITE IS ONLY, KNOWN POOR FEN IN COUNTY. THREATENED BY RUNOFF W-l\TER FROM UPSLOPE.
PRIOR LAKE OUTLET & CHANNEL IMPROVEMENT
Minnesota Natural Heritage Database Tl15N R22W SEC. 3, la, 13-15, 23, 27, 35, SCOTT COUNTY 10:37 Wednesday, APRIL 07, 2004 4
Element Occurrence Records MnDNR, Natural Heritage and Nongame Research Program Copyright 2004 State of Minnesota DNR
TllSN R22W,NWNE03 SCOTT COUNTY, MN
Element: HALIAEETUS LEUCOCEPHALUS (BALD EAGLE) #1683 Last Observed Date: 2003 DNR Region: 6
State Status: SPECIAL CONCERN Federal Status: THREATENED Wildlife Area: 605
EO Size: EO Rank: CUrrent Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: WILKIE & RICE LAKE UNITS CBS Site #: 5 Latitude: 44 48' 12" Long: 93 26' 42"
Ownership: U.S. Fish and Wildlife Service (National Wildlife Refuge) Precision: within 0.25 mile. confirmed
Managed Area(s) : MINNESOTA VALLEY NWR
Source: GALLI, J. (DNR) Voucher: SC -001 Verification: verified
NESTING AREA, BLUE LAKE.
T11SN R22W 11 SCOTT COUNTY, MN
Element: DRY PRAIRIE (SOUTHEAST) BARRENS SUBTYPE #12 'Last Observed Date: 01 December 1997 DNR Region: 6
S Rank: Sl Wildlife Area: 605
EO Size: EO Rank: C Current Status: 0 Intended Status: 8 Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: DEAN'S LAKE CBS Site #: 4 Latitude: 44 46' 55" Long: 93 25' 50"
Ownership: Private Precision: approx. boundaries have been determined
Managed Area(s): not managed or no record
Source: HARRIS,F. (CO BIOL SURVEY 1997) Voucher: Verification: verified
PRAIRIE ON LOW SAND DUNES ON TERRACE WITHIN MN RIVER VALLEY. DOM'D BY SPOROBOLIS CR, SCHIZACHYRIUM, BOUTELOUA C, STIPA SP' PANICUM WIL. GOOD DIVERSITY OF TYPICAL
SPP INCL PETALOSTEMON VILL, FROELICHIA, PASPALUM, OENOTHERA RHOMB. LONG HIST OF GRAZING HAS PROMOTED WEEDS: POA COMP, AGROPYRON REPENS, BROMOS lNER, DIGITARIA.
IN LRG OPENINGS AMONG OAK WOODLAND PATCHES, LOCATED N OF BYPASS, AROUND NSP, IN NESWl1 AND IN SEll. SHOULD RECOVER WELL W/FIRE. THREATENED BY DEVELOPMENT.
Tl15N R22W ONSWSE11 SCOTT COUNTY, MN
Element: OENOTHERA RHOMBIPETALA (RHOMBIC-PETALED EVENING PRIMROSE) #19 Last Observed Date: is August 1995 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 605
EO Size: EO Rank: C Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16e) Forestry District: 613
Site: DEAN'S LAKE CBS Site #: 4 Latitude: 44 46' 43" Long: 93 25' 37"
Ownership: Private precision: within 0.25 mile, confirmed
Managed Area(s): not managed or no record
Source: HARRIS,F. (95075) Voucher: MIN Verification: verified
50+ PLANTS SCATTERED IN AREAS OF FAIRLY LOOSE SAND IN DISTURBED SAND BARRENS PRAIRIE ON TERRACE OF MINN RIVER. IN PRAIRIE DOM BY SPOROBOLIS CRYPTANDRUS &
BOUT HIRSUTA. WITH'FROELICHIA FLOR, HELIAlITHUS RIGIDUS, CYPERUS SCHWEINITZII, PANICUM WILCOX. LOCATED UNDER POWERLINES IN SE SECTION 11 & S OF NEW FREEWAY IN
NWNESW SECTION 11,
T115N R22W SWSEl1 SCOTT COUNTY, MN *** SITE THREATENED ***
Element: PEROGNATHUS FLAVESCENS (PLAINS POCKET MOUSE) #21 Last Observed Date: 24 July 1997 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 605
EO Size: EO Rank: A Current Status: Intended Status: QUad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: DEAN'S LAKE CBS Site #: 4 Latitude: 44 46' 45" Long: 93 25' 40"
Ownership: Private precision: within 0.25 mile, confirmed
Managed Area(s): not managed or no record
Source: NORDQUIST,G., ENGELHARD,M. & BUCK,W. (CO BIOL SURVEY 1997) (MKE-97069) Voucher: JFBM Verification: verified
ONE, ADULT MALE IN BREEDING CONDITION TRAPPED DURING 1997 MCBS SURVEY. THIS WAS THE ONLY OTHER LOCATION IN THE VICINITY OF THE EAGLE CREEK POPULATION WHERE THIS
SPECIES WAS RECORDED, THE DRY SAND PRAIRIE HABITAT, WHILE DISTURBED, IS IDEAL HABITAT FOR THIS SPECIES. THE 52 ACRES OWNED BY MNDOT IS SURROUNDED BY A LARGE
AREA OF SIMILAR HABITAT THAT IS PRIVATELY OWNED AND SCHEDULED FOR DEVELCPEMENT. EFFORTS SHOULD, BE MADE TO PROTECT THE 52 ACRE PARCEL AND ADJ'ACENT LANDS.
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Minnesota Natural Heritage Database TllSN R22W SEC. 3, 10, 13-15, 23, 27, 35, SCOTT COUNTY 10:37 Wednesday, APRIL 07, 2004 5
Element Occurrence Records MnDNR, Natural Heritage and Nongame Research Program Copyright 2004 State of Minnesota DNR
Tl15N R22W NWSWll SCOTT COUNTY, MN
Element: PITUOPHIS CATENIFER (GOPHER SNAKE) #99 Last Observed Date: 18 October 1997 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 605
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: DEAN'S LAKE CBS Site #: 4 Latitude: 44 46' 58" Long: 93 26' 17"
Ownership: Owner unknown precision: within 0.25 mile, confirmed
Managed Area(s): not managed or no record
Source: HALL,C. (CO BIOI, SURVEY 1997) Voucher: Verification: verified
1 ADULT SNAKE WAS FOUND DEAD ON HWY 169. ADJACENT HABITAT CONSISTED OF OPEN GRASSLAND WITH SCATTERED OAKS ON SANDY SOILS. THE SPECIMEN WAS RETAINED.
T115N R22W 12 SCOTT COUNTY. MN
Element: SPEYERIA IDALIA (REGAL FRITTlLARY) #40 Last Observed Date: 09 September 1965 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 605
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: BARDEN PUNES Latitude: 44 46' 47" Long: 93 24' 48"
Ownership: Owner unknown Precision: within one mile
Managed Area(s): not managed or no record
Source: TAYLOR,OR.,JR. (R.HUBER, DATA LOG), Voucher: Verification: verified
COLLECTION RECORDED IN R. HUBER'S DATA LOG; LOCATION OF SPECIMEN UNKNOWN. SITE LISTED AS BARDEN DUNES, HABITAT NOT DESCRIBED.
T115N R22W NESE13 SCOTT COUNTY, MN
Element: BESSEYA BULLII (KITTEN-TAILS) #121 Last Observed Date: 17 September 2002 DNR Region: 6
State Status: THREATENED Wildlife Area: 605
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: EAGLE CREEK 13 Latitude: 44 45' 52" Long: 93 24' I"
Ownership: MN DNR Fisheries Precision: within 0.25 mile, confirmed
Managed Area(s): EAGLE CREEK AQUATIC MANAGEMENT AREA
Source: FUGE,E. (SIGHT RECORD) Voucher: Verification: sight or sound rec.
8 PLANTS OBS (NO FLOWER STALKS SEEN) IN SMALL 1/4 ACRE DEGRADED PRAIRIE OPENING ON WEST-FACING SLOPE OF HEADWATERS OF W BRANCH OF EAGLE CREEK. PRAIRIE OPENING
ENCROACHED UPON BY SHRUBS & TREES (PIN OAK,HAZEL) & HAS LEAFY SPRUGE THRU-OUT. DOMINATED BY BLUEGRASS'W/ANNUAL RAGWEED. OTHER NATlVE~ INCLUDE GEUM TRIFLORUM,
SCHIZACHYRIUM SCOPAR, BOUTELOUA CURT, PETELOSTEMON PURP, ASTER SERICEUS, ASTER OOLENTANGIBNSIS, SOLIDAGO NBMOR, ANDROPOGON GER, MONARDA FIST, GNAPHALIUM OBTOS.
TllSN R22W SW22 SCOTT COUNTY, MN
Element: MAPLE-BASSWOOD FOREST (BIG WOODS) #134 Last Observed Date: 10 October 1995 DNR Region: 6
S Rank: S2 ,Wildlife Area: 605
EO Size: 25 acres approx EO Rank: C Current Status: Intended Status: Quad Map: PRIOR LAKE (T16B) Forestry District: 613
Site: SHAKOPEE MEDWAKANTON WOODS CBS Site #: 54 Latitude: 44 44' 57" Long: 93 27' 20.
Ownership: Native American land Precision: appro~. boundaries have been determined
Managed Area(s): PRIOR LAKE RESERVATION
Source: WOVCHA,D.S. (CO BIOI, SURVEY 1995) Voucher: Verification: verified
MAPLE-BASSWOOD FOREST ON LEVEL TO GENTLY SLOPING UPLAND. GAPPY CANOPY (75% COV) OF 30-80CM DIAM TILIA, ACER SACCHARUM & QUERCUS RUBRA., (OR X ELLIPSOIDALIS) .
TREES OFTEN FORKED, MULTI-STEMMED; OR OPEN-GROWN. YOUNGER QUERCUS. cARYA. OR POPULUS FILLING LARGER GAPS. PATCHY SUBCANOPYOF ACER & OSTRYA. SHRUB LAYER WITH
DENSE PATCHES OF ACER. GROUND LAYER W/PATCHES OF LAPORTEA, OTHERWISE SPARSE. OCCAS LARGE SNAG, DECAYING LOG. OCCAS CUT STUMP. B-WlRE FENCE. DARK SILTY LOAM.
PRIOR LAKE OurLET &: CHANNEL IMPROVEMENT
Minnesota Natural Heritage Database Tl15N R22W SEC. 3, 10, 13-15. 23, 27, 35, SCOTT COUNTY 10:37 Wednesday, APRIL 07, 2004 6
Element Occurrence Records MnDNa, Natural Heritage and Nongame Research Program Copyright 2004 State of Minnesota DNa
TllSN R22W SE27 SCOTT COUNTY, MN
Element: MAPLE-BASSWOOD FOREST (BIG WOODS) #131 Last Observed Date: 28 June 1996 DNa Region: 6
S Rank: S2 Wildlife Area: 605
EO Size: 20 acres approx EO Rank: C CUrrent Status: Intended Status: Quad Map: PRIOR LAKE (T16B) Forestry District: 613
Site: SHAKO PEE 27 CBS Site #: 12 Latitude: 44 44' 10. Long: 93 26' 44"
Ownership: Private Precision: appro~. boundaries have been determined
Managed Area(s): not managed or no record
Source: WOVCHA,D.S. (CO BIOL SURVEY 1996) , Voucher: Verification: verified
YOUNG MAPLE-BASSWOOD FOREST ON NE-FACING SLOPE OF LONG RIDGE. CONT CANOl'Y DOM BY 20-40CM DIAM ACER SACCHARUM, QUERCUS RUBRA &: TILIA. ,StlBCANQl'Y OF OSTRYA &: ACER.
SHRUB LAYER MAINLY OF ACER SAPLINGS, OFTEN DENSE &: SHADING our HERBS BELOW. GRND LAYER GENERALLY SPARSE, ALTHOUGH RICHER ON MOISTER LOWER SLOPES NEAR POND, THIN
LITTER LAYER, WASHED AWAY IN PLACES. SILTY/SANDY LOAM; LITTLE HUMUS. SMALL AMNT OF SMALL-MED DIAM WOODY DEBRIS. OCCAS DEAD ELM. OCCAS CUT STUMP. ATV TRAIL.
TllSN R22W SWSE33 SCOTT COUNTY, MN
Element: MAPLE-BASSWOOD FOREST (BIG WOODS) #133 Last Observed Date: 15 August 1995 DNa Region: 6
S Rank: S2 Wildlife Area: 60S
EO Size: 40 acres approx EO Rank: C Current Status: Intended Status: Quad Map: PRIOR LAKE (Tl6B) Forestry District: 613
Site: SPRING LAKE REGIONAL PARK CBS Site #: 13 Latitude: 44 43' 10" Long: 93 2,8' 4"
Ownership: Regional Park precision: approx. boundaries have been determined
Managed Area(s): SPRING LAKE REGIONAL PARK
Source: WOVCHA,D.S, (CO BIOL SURVEY 1995) Voucher: Verification: verified
FOREST ON GENTLE KNOLL &: ADJ LOW MOIST AREA. INTRRUpTED, UNEVEN-AGED CANOPY (75% COVR) OF 30-60CM DIAM QUERCUS RUBRA, ACER SACCHARUM &: TILIA. MANY CROOKED TREES.
OFTEN LACKING SUBCANOpY, Bur WHERE PRESENT, OF ACER, OSTRYA, CELTIS. SHRUB LAYER PATCHY, DENSE BENEATH GAPS. GRND LAYER W/ABUND CIRCAEA &: PATCHES OF AMpHICARpA.
ABUND WOODY DEBRIS OF ALL SIZES, OFTEN WELL DECAYED. SNAGS COMMON. RICH HUMUS. LOWLAND HRDWDFOREST INCLUSION 'IN LOW AREA W/VERY LRG A. SACCHARINUM, OTHER SPP.
TllSN R22W SENE36 SCOTT COUNTY, MN
Element: BurEO LINEATUS (RED-SHOULDERED HAWK) #200 Last Observed Date: 1995 DNa Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 605
EO Size: EO Rank: Current Status: Intended Status: Quad Map: PRIOR LAKE (T16B) Forestry District: 613
Site: EAGLE CREEK 36 Latitude: 44 43' 31" Long: 93 24' 7"
Ownership: Owner unknown Precision: within 0.25 mile, confirmed
Managed Area(s}: not managed or no record
Source: STEVENS,p. Voucher: Verification: verified
POSITIVE NESTING. 1993: 1 NEST WITH YOUNG. PHOTO OF YOUNG IN SPECIES FILE. 1994 &: 1995: 1 NEST IN OAK TREE (DIFFERENT FROM 1993 TREE). ADULTS OBSERVED ALL
SUMMER, BEHAVIOR SUGGESTS YOUNG PRESENT.
T1l6N R22W 33 HENNEPIN COUNTY, MN
Element: GALLINULA CHLOROpUS (COMMON MOORHEN) #20 Last Observed Date: 14 June 1991 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 610
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: FLYING CLOUD PRAIRIE CBS Site #: 5 Latitude: 44 48' 43" Long: 93 28' 8"
Olmership: Owner unknown precision: within 0,50 mile
Managed Area(s): not managed or no record
Source: MOEN,S. (1991 BREEDING SURVEY REPORT) Voucher: Verification: sight or sound rec.
BREEDING SEASON OBSERVATION. 1 BIRD OBSERVED FORAGING ON GRASS LAKE.
- - - - - - - - - - - - - - - - - - -
== == == == == == == == == == == == == == == == == == .-
PRIOR LAKE OUTLET & CHANNEL IMPROVEMENT
Minnesota Natural Heritage Database Tl15N R22W SEC. 3. 10, 13-15, 23, 27, 35, SCOTT COUNTY 10:37 Wednesday, APRIL 07, 2004 7
Element Occurrence' Records MnDNR, Natural Heritage and Nongame Research Program Copyright 2004 State of Minnesota DNR
Tl16N R22W NENE33 HENNEPIN COUNTY, MN
Element: PITUOPHIS CATENIFER (GOPHER SNAKE) #101 Last Observed Date: 24 September 1997 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 610
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16CI Forestry District: 613
Site: FLYING CLOUD PRAIRIE CBS Site #: 5 Latitude: 44 49' 6" Long: 93 27' 37"
Ownership: Owner unknown Precision: within 0.25 mile. confirmed
Managed Area(s): not managed or no record
Source: HALL, C., G.NORDQUIST. AND S.STUCKER (CO BIOL SURVEY 19971 Voucher: Verification: verified
1 JUVENILE BULLSNAKE WAS INJURED ON GRAVEL ROAD AND'LATER DIED FROM INJURIES. HABITAT ADJACENT TO ROAD WAS OPEN GRASSLAND, GRASS LAKE lIND MN RIVER TO THE
SOUTH. SNAKE MEASURED 415 ,MM SVL, 476 MM TBL.
T1l6N R22W 34 SCOTT COUNTY. MN
Element: COLONIAL WATERBIRD NESTING SITE #52 Last Observed Date: 1980 ,DNR Region: 6
Wildlife Area: 605
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: WILKIE & RICE LAKE UNITS CBS Site #:5 Latitude: 44 48' 20" Long: 93 26' 25"
Ownership: U.S. Fish and Wildlife Service (National Wildlife Refuge) Precision: within 0.25 mile, confirmed
Managed Area(s): MINNESOTA VALLEY NWR
Source: DNR NONGAME Voucher: Verification: verified
BLUE LAKE. GREAT BLUE HERON GREAT EGRET "BLACK-CROWNED NIGHT HERON DOUBLE-CRESTED CORMORANT
Tl16N R22W OS28NWNE34 HENNEPIN COUNTY, MN
Element: DRY PRAIRIE (CENTRAL) SlIND-GRAVEL SUBTYPE #111 Last Observed Date: 06 August 1996 ;DNR Region: 6
S Rank: S2 Wildlife Area: 610
EO Size: EO Rank: C Current Status: Intended Status: Quad, Map: EDEN PRAIRIE (S16CI Forestry District: 613
Site: FLYING CLOUD PRAIRIE CBS Site #: 5 ,Latitude: 44 49' 2" Long: 9,3 26' 52"
Ownership: Private Precision: approx. boundaries have been determined
Managed Area(sl: not managed or no record
Source: HARRIS,F. (CO BIOL SURVEY 1996) Voucher: Verification: verified
2 MILE STRETCH OF STEEP-, S-FACING SLOPES ON OUTWASH. COMMON DOM'S INCL BOUTELOUA C, SCHIZACHYRIUM, STIPA S. DRY SPURS DOM BY SPOROBOLIS C, CALAMOVILFA, BOUTELOUA
H. FAIR SPP DIVERSITY. HEAVY INFESTATIONS OF EUPHORBIA E, POA PRAT, POA COMP, & BROMUS IN MUCH OF AREA. GRAZED IN PAST. DRIEST PARTS IN. BEST SHAPE. SCATTERED
LARGE JUNIPERUS VIRG. ON EXCESSIVELY-DRAINED SANDY SOILS (SALIDA, HUBBARD) ON N SIDE MINN RIVER VALLEY. ONE OF LARGEST PRAIRIE REMNANTS LEFT IN METRO AREA.
Tl16N R22W SESE34 SCOTT COUNTY, MN
Element: HALIAEETUS LEUCOCEPHALUS (BALD EAGLE) #1442 Last Observed Date: 1998 DNR Region: 6
State Status: SPECIAL CONCERN Federal Status: THREATENED Wildlife Area: 605
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16CI Forestry District: 613
Site: WILKIE & RICE LAKE UNITS CBS Site #: 5 Latit;ude: 44 48' 20" Long: 93 26' 25"
Ownership: U.S. Fish and Wildlife Service (National Wildlife Refuge) Precision: within 0.25 mile, confirmed
Managed Area(sl: MINNESOTA VALLEY NWR
Source: STEFANSKI,M. (MN VALLEY REFUGEI Voucher: SC -001 Verification: verified
NESTING AREA, BLUE LAKE.
PRIOR LAKE OurLET & CHANNEL IMPROVEMENT
Minnesota Natural Heritage Database T11sN R22W SEC. 3, 10, 13-15, 23, 27, 35, SCOTT COUNTY 10:37 Wednesday. APRIL 07. 2004 8
Element Occurrence Records MnDNR, Natural Heritage and Nongame Research Program Copyright 2004 State of Minnesota DNR
Tl16N R22W SENWSE34 SCOTT COUNTY, MN
Element: MUSSEL SAMPLING SITE #137 Last Observed Date: 23 August 1989 DNR Region: 6
wildlife Area: 60S
EO Size: EO Rank: Current Status: Int'ended Status: Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: DNR RIVER MILE 19.5 SITE 53 CBS Site #: 5 Latitude: 44 48' 23" Long: 93 26' 34"
Ownership: Owner unknown Precision: within 0.25 mile, confirmed
Managed Area(s): not managed or no record
Source: BRIGHT,B. (MUSSEL SURVEY OF MINNESOTA RIVER) Voucher: Verification:
ACCESS IS OFF MN RIVER VALLEY REFUGE SERVICE RD, APPROX 100 M DOWNSTREAM FROM BLUE LAKE INLET. TIMED SEARCH: NO MUSSELS FOUND. GRID SEARCH; DEAD SPECIES:
LEPTODEA FRAGILIS.
Tl16N R22W NWNW34 HENNEPIN' COUNTY, MN
Element: PITUOPHIS CATENIFER (GOPHER SNAKE) #102 Last Observed Date: 09 May 1997 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 610
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (SI6C) Forestry District: 613
Site: FLYING CLOUD PRAIRIE CBS Site #: 5 Latitude: 44 49' 7" Long: 93 27' 24"
Ownership: Owner unknown Precision: within 0.25 mile, confirmed
Managed Area(s): not managed or no record
Source: HALL,C., J.LECLERE, J.CORDESS, B.HOPE, AND G.NORDQUIST (CO BIOL SURVEY 1997) Voucher: Verification: sight or sound rec.
2 SHED SNAKE SKINS WERE FOUND IN GRASSLAND. SKINS HAD INITIALLY BEEN LOCATED BY BRETT HOPE IN FALL 1996. SKINS ROUGHLY MEASURED 1360 MM AND 2240 MM TBL.
T116N R22W NW34 HENNEPIN COUNTY, MN
Element: REITHRODONTOMYS MEGALOTIS (WESTERN HARVEST MOUSE) #2 Last Observed Date: September 1979 DNR Region: 6
State Status: No Legal Status ' Wildlife Area: 610
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (SI6C) Forestry District: 613
Site: FLYING CLOUD PRAIRIE CBS Site #: 5 Latitude: 44 49' 6" Long: 93 27' 25"
OwnerShip: Owner unknown precision: within 0.25 mile, confirmed
Managed Area(s): not managed or no record
Source: MNRIVER VALLEY WILDLIFE INVENTORY (136); CLAUSON,B., JATNIEKS,S. Voucher: 14054 JFBM Verification: verified
WESTERN HARVEST MOUSE. 9 PREV COLL(134-135,199-202,212-214, JFBM 14052-14053, 14055-14061). DRY PRAIRIE, STEEP DRY SLOPE ON HILLSIDE.
Tl16N R22W SESW35 SCOTT COUNTY, MN
Element: COLONIAL WATERBIRD NESTING SITE #846 Last Observed Date: 1991 DNR Region: 6
Wildlife Area: 605
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16e) Forestry District: 613
Site: WILKIE & RICE LAKE UNITS CBS Site #: 5 Latitude: 44 48' 18" Long: 93 26' 1"
Ownership: U,S, Fish and Wildlife Service (National Wildlife Refuge) Precision: within 0.25 mile, confirmed
Managed Area(s): MINNESOTA VALLEY NWR
Source: USFWS Voucher: Verification: verified
BLUE LAKE. FORSTER'S TERN
- - - - - - - - - - - - - - - - - - -
== == == == == == == == == == == == == == == == == == =
PRIOR LAKE OUTLET & CHANNEL IMPROVEMENT
Minnesota Natural Heritage Database TllSN R22W SEC. 3, 10, 13-15, 23, 27, 35, SCOTT COUNTY 10:37 Wednesday, APRIL 07, 2004 9
Element Occurrence Records MnDNR, Natural Heritage and Nongame Research Program Copyright 2004 State of Minnesota DNR
Tl16N R22W SWNE3S HENNEPIN COUNTY, MN
Element: DRY PRAIRIE (CENTRAL) SAND-GRAVEL SUBTYPE #88 Last Observed Date: 06 August 1996 cDNR Region: 6
S Rank: S2 Wildlife Area: 610
EO Size: 8 acres approx. EO Rank: BC Current Status: 0 Intended Status: 2 Quad Map: EDEN PRAIRIE (S16C) Forestry District: 613
Site: PURGATORY CREEK CBS Site #: 4 Latitude: 44 48' 43" Long: 93 25' 37"
Ownership: Owner unknown Precision: approx. boundaries have been determined
Managed Area(s): not managed or no recordc
Source: CUSHING,E. (1971); HARRIS,F. (CO BIOL SURVEY 1996) Voucher: Verification: verified
1971: DRY MESIC PRAIRIE COVER CLASS ON S FACING BLUFF ABOVE MN R. ONE OF FINEST PRAIRIE REMNANTS IN COUNTY. VARIES FROM TALL TO SHORT GRASS TYPES. 1996: MOSTLY
DOM BY BOUTELOUA C, SCHIZACH, STIPA SPART. DRIEST SPOTS DOM BY CALAMOVILFA & BOUTELOUA H. DRY-MESIC DWNSLOPE. LOW SPP DIVERS INCL: SPOROBOLIS H, PSORALEA ES,
KOELARIA, ASTER SER. RANGES FROM BC-CD QUAL. HEAVY INFEST EUPHORBIA ES, POA PRAT POA COMPo SCATT JUNIPERUS VIRG. HOUSES ON EDGE. ON STEEP S SLOPES ON OUTWASH.
Tl16N R22W SESW35 SCOTT COUNTY, MN
Element: STERNA FORSTER I (FORSTER'S TERN) #34 Last Observed Date: 1991 DNR Region: 6
State Status: SPECIAL CONCERN Wildlife Area: 605
EO Size: EO Rank: Current Status: Intended Status: Quad Map: EDEN PRAIRIE (S16e) Forestry District: 613
Site: JAMES W. WILKIE UNIT Latitude: 44 48' 18" Long: 93 26' 1"
ownership: U.S. Fish and Wildlife service (National Wildlife Refuge) precision: within 0.25 mile, confirmed
Managed Area(s): MINNESOTA VALLEY NWR
Source: USFWS Voucher: Verification: verified
POSITIVE NESTING. BLUE LAKE. OTCN-846.
I
Rare Features Database Print-outs: An Explanation of Fields
I The Rare Features database is part of the Natural Heritage Information Sys~em,
and is maintained by the Natural Heritage and ,Nongame Research Program,
I a unit within the Division of Ecological Services,
Minnesota Department of Natural Resources (DNR).
I **Please note that the print-outs are copyrighted and may not be reproduced without pennission**
Field Name: [Full (non-abreviated) field name, if different]. Further explanation of field.
-C-
- CBS Site: [County Biological Survey site number]. In each county, the numbering system begins with 1.
CLASS: A c;:ode which classifies features by broad taxonomic group: NC = natural community; SA = special animal; SP =
special plant; GP = geologic process; GT = geologic time; OT = other (e.g. colonial waterbird colonies, bat hibernacula).
E Q:y,: [County]. Minnesota counties (ordered alphabetically) are numbered from I (Aitkin) to 87 (Yellow Medicine).
CURRENT 8T ATUS: Present protection status, from 0 (owner is not aware of record) to 9 (dedicated as a Scientific and
Natural Area).
m -D-
DNR Remon: l=NW, 2=NE, 3=E Central, 4=SW, 5=SE, 6= Minneapolis/St. Paul Metro.
DNR Ouad: [DNR Quadrangle code]. DNR-assigned code of the U.S. Geologic Survey topographic map on which the rare
feature occurs.
m -E-
ELEMENT or Element: See "Element Name (Common :Name)"
Element Name (Common Name): The name of the rare feature. For plant and animal species records, this field holds the .
m scientific name, followed by the common name in parentheses; for all other elements (such as plant communities, which, have
no scientific i:1ame) it is solely the element name; ,
EO RANK: [Element Occlll'(ence Rank]. An evaluation of the 'quality and condition of natural communities from A (highest)
to D (lowest).
m . EO Size: [Element Occurrence Si.ze]. The size in acres (often 'estimated) of natural communities.
-F-
FED STATUS: [Federal Status]. Status of species under the Federal Endl,mgered Species Law: LE=endangered,
U LT=threatened, C~species which have been proposed for federal listing.
Federal Status: See "FED STATUS"
Forestrv District: The ~esota DNR's Division ofFor~strydistrict number.
-G-
U GLOBAL RANK: The abundance of an element globally, from G 1 (critically imperiled due to extreme rarity on a world-wide
basis) to 05 (demonstrably secure, though perhaps rare in parts of its range). Global ranks are determined by the Conservation
.Science Division of The Nature Conservancy.
I -1-
INTENDED STATUS: Desired protection status. -See also "CURRENT STATUS.'" If a complete list of protection status
codes is.needed, please contact the Natural Heritage Program. .
-L-
0 LAST OBSERVED or Last Observed Date or Last Observation: Date of the most recent record of the element at the location.
Latitude: The location at which the occurrence is mapped on Natural Heritage Program maps. NOTE: There are various
levels of precision in the original information, but this is not reflected in the latitudellongitude data. For some of the data,
D particularly historical records, it was not possible to determine exactly where the original observation was made (e.g. "Fort
Snelling", or "the south shore of Lake Owasso"). Thus the latitude/longitude reflect the mapped location, and not necessarily
the observation location.
0 Legal: Township, range and section numbers.
Long:: [Longitude]. See NOTE under "Latitude"
-M-
MANAGED AREA or Managed Area(s): Name of the federally, state, locally, or privately managed park, forest, preserve, etc.,
0 containing the occurrence, if any. . If this field is blank, the element probably occurs on private land. If "(STATUTORY
BOUNDARY)" occurs after the name of a managed area, the location may be a private inholding within the statutory boundary
of a state forest or park.
D Map Sym: [Map Symbol].
MN STATUS: [Minnesota Status]. Legal status of plant and animal species under the Minnesota endangered species law:
g
END=endangered, THR=threatened, SPC=special concern, NON=no legal status, but tracked. This field is blank for na,tural I
communities and colonial waterbird nesting sites, which have no legal status in Minnesota, but are tracked by the database.
-N- , I
NC Rank: [Natural Community Rank].
~O-
Occ #: [Occurrence Number]. The occurrence number, in combination with the element name, uniquely identifies each record. I
OCCURRENCE NUMBER: See "Occ #"
# OF OCCURS: The number of records existent in the database for each element within the area searched.
Ownership: Indicates whether the site is publicly or privately owned; for publicly owned land, the agency with management
responsibility is listed. I
-p-
Precision: Precision of locational information of occurrence: C (confirmed) = known within 1/4 mile radius, U (unconfirmed) =
known within 1/2 mile, N (non-specific) = known within 1 mile, G (general) = occurs within the general region, X I
(unmappable)=location is unmappable on USGS topographic quadrangles (often known only to the nearest county), 0
(obscurelgone)=element no longer exists at the location.
PS: [Primary Section]. The section containing all or the greatest part of the occurrence. I
-Q-
Ouad Map: See "DNR Quad"
-R-
Rec #: [Record number]. I
RNG or Rng: [Range number].
-8-
SECTION or Section: [Section number(s)]. Some records are given only to the nearest section (s), but rp.ost are given to the I
nearest quarter-section or quarter-quarter-section (e.g., SWNW32 denotes the SWII4 of the NWl/4 of section 32). A "0" is
used as a place holder when a half-section is specified (e.g., ON03 refers to the north 1/2 of section 3). When a occurrence
crosses section boundaries, both sections are listed, without punctuation (e.g., the NEl/4 of section 19 and NWl/4 of section 20
is displayed as "NEI9NW20"). ' "I
Site: A name which refers to the geographic area within which the occurrence lies. If no name for the area exists (a locally used
name, for example), one is assigned by the County Biological Surveyor the Natural Heritage Program:
Source: The collector or observer of the rare feature occurrence. I
S RANK: [State Rank]. A rank assigned to the natural community type which reflects the known extent and condition of that
community in" Minnesota. Ranks range from 1 (in greatest need of conservation action in the state) t05 (secure under present
conditions). A "?" following a rank indicates little information is available to rank the community. Communities for which
information is especially scarce are given a "U", for "rank undetermined". The ranks do not represent a legal status. They are I
used by the Minnesota Department of Natural Resources to set priorities for research, inventory and conservation planning.
The state ranks are updated as inventory information becomes available.
State Status: See "MN STATUS" I
-T-
TWP or IYm,: [Township number].
-v-
Verification: A reflection of the reliability of the information on which the record i"s based. Th~ highest level of reliability is I
"venfied," which usually indicates a collection was made or, in the case of bird records, nesting was observed. Plant records
based on collections made before 1970 are unverified.
Voucher: The museum or herbarium where specimens are maintained, and the accession number assigned by the repository. In I
the case of bald eagles, this is the breeding area number.
-w- '
Wildlife Area: The Minnesota DNR's Division of Wildlife administrative number."
Data Security I
Locations of some rare features must be treated as sensitive infonnation because widespread knowledge of these locations could result in harm to the rare
features. For example, wildflowers such as orchids and economically valuable plants such as ginseng are vulnerable to exploitation by collectors; other species, I
such as bald eagles, are sensitive to disturbance by observers. For this reason, we prefer that publications not identify the precise locations of vulnerable species.
We suggest describing the location only to the nearest section. If this is not acceptable for your purposes, please call and discuss this issue with" the
Environmental Review Specialist for the Natural Heritage and Nongame Research Program at 6511296-7863.
Revised 912002 I
I
I
E
E
I
m
m
m
u Exhibit 11:
Existing and Proposed Outlet Box Rating Curve
U
m
u
u
0
0
0
0
0
U
U
U
U Exhibit 11
U New Old
Rating Rating
Curve Curve
U Depth WSEI Q- cfs Q- cfs
0 898.68 0 0
0.6 899.28 0 0
1.2 899.88 0 0
U 1.8 900.48 0 0
2.4 901.08 0 0
3 901.68 0 0
U 3.1 901 ;78 0 0
3.2 901.88 0 0
3.3 901.98 0 0
0 3.4 902.08 0 0
3.5 902.18 0 0
3.6 902.28 0 0
U 3.7 902.38 0 7.12
3.8 902.48 0 14.24
3,9 902.58 . 6.72 21.36
4 902.68 22.68 28.48
U 4.1 902.78 44 35.59
4.2 902.88 56.54 42.71
4.3 902.98 56.75 49.83
U 4.4 903.08 56.95 55.14
4.5 903.18 57.15 57.15
4.6 903.28 57.35 57.35
0 4.7 903.38 57.55 57.55
4.8 903.48 57.75 57.75
4.9 903.58 57.94 57.94
5 903.68 58.14 58.14
0 5.1 903.78 58.34 58.34
5.2 903.88 58.53 58;53
5.3 903.98 58.73 58.73
0 5.4 904.08 58.92 58.92
5.5 904.18 59.12 59.12
5.6 904.28 59.31 59.31
0 5.7 904.38 59.5 59.5
5.8 904.48 59.7 59.7
5.9 904.58 59.89 59.89
0 6 904.68 60.08 60.08
6.1 904.78 60.27 60.27
6.2 904.88 60.46 60.46
6.3 904.98 60.65 60.65
0 6.4 905,08 60.841 60.84
6,5 905.18 61.02 61.02
- 905.28
6,6 61.21 61.21
0 6.71 905.38 61.41 61.4
6.8 905.48 ' 61.58 61.58
6.9 905.58 61.77 61.77
0 7 905.68 61.951 61.95
-- 905.78 62,14 62.14
7.1
--- 62,32!
7.2 905.88 62.32
0 7.3 905,981 62,51 i 62.51
7.4 906,08 i 62.69l 62.69
7.5 906.18t 62.871 62.87
0 Page 1 of 2
Exhibit 11 I
New Old I
Rating Rating
Curve Curve
Depth WSEI Q- cfs Q- cfs I
7.6 906.28 63.05 63.05
7.7 906.38 63.24 63.24
7.8 906.48 63.42 63.42
7.9 906.58 63.6 63.6 I
8 906.68 63.78 63.78
8.1 906.78 63.96 63.96
8.2 906.88 64.13 64.13 I
8.3 906.98 64.31 64.31
8.4 907.08 64.49 64.49
8.5 907.18 64.67 64.67 I
8.6 907.28 64.84 64.84
8.7 . 907.38 65.02 65.02
8.8 907.48 65.2 65.2 I
8.9 907.58 65.37 65.37
9 907.68 65.55 65.55
9.1 907.78 65.72 65.72
9.2 907.88 65.9 65.9 I
9.3 907.98 66.07 66.07
9.4 908.08 66.24 66.24
9.5 908.18 66.41 66.41 I
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Page 2 of 2 I
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Exhibit 12:
I Shoreland Zoning Districts
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i I. Prior lake Outlet and Channel Improvement Project
II Shoreland Zoning
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I Note that there is no defined channel "'}""j':
I through Dean Lake, Pike Lake or Jeffers CJ ;:. ,"'C'" -<"'. I>
I II Ponds. The cha.nn~1 centerline. through ' . ~ ..~?ua~ry tak D:......",:-.}.:... ..... ." 0
I I these water bodies IS only provided for (j;g~ ", . '" Ib
I I stationing purposes. r.
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: 'I : I Prior Lake Outlet Channel l
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I Legend ~o
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. ---- Prior Lake Outlet Channel
I 1,;$1iL".1 Public Waters .. ". ..... .
I r:'JPLsLWOBoUndary ..~
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'I D Shoreland Zoning District a : ~ P D
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'I 0 2,200 4,400 8,800 Feet
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'I ~/../ Prior Lake-Spring Lake E h"b.t 12 +
". Watershed District X I I
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D Exhibit 13:
Highly Erodible Soils
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I Prior Lake Outlet Channel
!I Highly Erodible Soils
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I Segment 7
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Ii' .: Th '?"', Channel centerline
I ! 6\ 0 Public Waters
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..,~ Prior Lake-Spring Lake Exhl'bl't 13 ? I 1,~0 I 3,1100 I I 6,200 Feet +
. Watershed District I I
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m Exhibit 14:
Outlet Channel and Prior Lake-Spring Lake Watershed District
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I Prior Lake Outlet Channel and
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I Prior Lake-Spring Lake Watershed District
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: (I Minnesota River
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I Legend ,~
I II
I I - Prior Lake Outlet Channel
II c=J Project Area
----- Roads
I D Municipal Boundaries
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I i :b{1;;';"iiO' u IC a ers
I I ~ Prior Lake-Spring Lake WD
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Exhibit 14 I I I I J I I I I
;1 ". Watershed District
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E Exhibit 15:
State Historic Preservation Office Letter
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I Exhibit 15
. ID
m MINNESOTA HISTORICAL SOCIETY
m June 3, 2004
II Mr. Shannon Lotthammer '
II Prier Lake-Spring Lake Watershed District
15815 Franklin Trail SE, Suite 100
g Prior Lake, MN 55372
Re: Enhancementand bank stabilization of Prior Lake OutietChannel
g Scott County
SHPO Number: 2004-1657
o Dear Mr. Lotthammer:
O Thank you for responding to our request for additional information on the above
referenced project.
Based on our review of this information, we conclude that there are no properties listed
Don the National or State Registers of Historic Places, and no known or suspected
archaeological properties in the area that will be affected by this project.
O Please note that this comment letter does not address the requirements of Section 106
of the National Historic Preservatio'n Act of 1966 and 36CFR800, Procedures of the
Advisory Council on Historic Preservation for the protection of historic properties. If this
O project is considered for federal assistance, or requires a. federal permit or license, it
should be submitted to our office with reference to the assisting federal agency.
o Contact us at 651-296-54652 with questions or concerns.
O Sin. cerely,
1 '''\
. ~~r-vJ
o ~ Dennis A. Gimmestad
D 0 Govemment Programs & Compliance Officer
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