HomeMy WebLinkAbout4.C.2. Overhead Power Relocation on County Road 16 by Dakota Highlands Consent Business 4. C. 2.
SHHAKOJ'F E
TO: Mayor and City Council
Mark McNeill, City Administrator
FROM: Bruce Loney, Public Works Director
DATE: 08/19/2014
SUBJECT: Overhead Power Relocation on County Road 16 by Dakota Highlands (D)
Action Sought
Approve a motion determining that the overhead power line to be relocated be placed
underground from Foothill Trail to the east plat line of Dakota Highlands and the remaining line
to be overhead with SPUC acknowledgment of future undergrounding upon CR 16 improvements.
Background
Ryland Homes is developing two signal family residential plats in East Shakopee along CR 16. In
order to construct required turn lanes for Scott County, the overhead power lines need to be
relocated.
The roadway improvements are such that the overhead power lines are affected by 1070 feet west
of Dakota Highlands plat and 770 feet east for a total distance of 3,180 feet. The City can require
the power lines to be relocated underground or can allow them to be overhead.
Attached is a memo from Joe Adams of Shakopee Public Utilities (SPU) on the costs of
relocating power lines and their concern of undergrounding in access where CR 16 is not
constructed to its permanent state.
In review of SPU's memo, staff would agree to not underground lines in areas where there could
be future county improvements. Staff would like SPU to acknowledge that undergrounding of
overhead lines when improvements are made would be required.
Staff would further recommend undergrounding of power lines from Foothill Trail to the east plat
line of Dakota Highlands. The reason for undergrounding adjacent to Lot 1, Block 4, Horizon
Heights 2nd Addition is that a bituminous trail will be built by the developer and to minimize tree
loss to this property. Also, Ryland Homes had indicated a willingness to pay for the
undergrounding in this area. The rest of the undergrounding cost would be paid out of the
Relocation Underground Charge Fund.
Recommendation
Staff recommends undergrounding the existing overhead power lines from Foothill Trail to the
east plat line of Dakota Highlands. The remaining relocation overhead power lines can remain
overhead with acknowledgment that this line would go underground upon future County Road 16
improvements.
Budget Impact
None to city funds.
Relationship to Vision
This supports Goal D: Maintain, improve and create strong partnerships with other public and
private sector entities.
Requested Action
Approve a motion determining that the overhead power line to be relocated be placed
underground from Foothill Trail to the east plat line of Dakota Highlands and the remaining line
to be overhead with SPUC acknowledgment of future undergrounding upon CR 16 improvements.
Attachments: Memo from SPU
Plat
Location Map
Location Map 2
9b
SHAKOPEE PUBLIC UTILITIES
MEMORANDUM
OA
TO: John Crooks, Utilities Manager
FROM: Joseph D. Adams,Planning&
gineerin g Director • )�
SUBJECT: CR 16 Overhead Line Relocation
DATE: July 17,2014
ISSUE
Ryland Homes is developing two single family home plats in east Shakopee,Dakota Crossings and
Dakota Highlands. Scott County is requiring Ryland to construct CR 16 improvements for access that
include turn and approach lanes and wider shoulders. These roadway improvements extend all along
the plats a distance of 1,340 feet plus 770 feet further east and 1,070 feet further west to taper into the
existing county road. A trail will be installed along the south side of the CR 16 and the plats within the
new right of way at a location and elevation that should not change in the future if the pavement area is
expanded. In addition, storm water drainage improvements include an oversized regional pond and
two large diameter storm sewer outlet pipes to connect the pond to the Prior Lake Drainage channel on
the south side of CR 16 to the west of the plats.
These improvements to CR 16 require the relocation of utility lines; including the SPU overhead three-
phase distribution line running along the south side of CR 16 for a total distance of approximately
3,180 feet.
BACKGROUND
The existing overhead power line along CR 16 between CR 18 and CR 83 was originally acquired in
1991 from MVEC with the service territory acquisition. The line consists of a REC standard three 4/0
ACSR overhead phase wire design and a single 1/0 ACSR neutral wire on wood poles and cross arms.
At the present,the existing overhead three-phase main line feeder provides bulk distribution to the area
along CR 16 between CR 18 and CR 83. The line also provides a critical function as a back up path
during contingencies to areas in east Shakopee along CR 18 and to our service territory in Prior Lake.
Within the project area,there are several existing overhead service taps and also three underground
primary risers.
AI 21 i8t'.
Per the terms of the City of Shakopee's Right of Way Management Ordinance,the Council may order
the entire line segment to be relocated underground or allow it to be relocated overhead pending
notification of the cost difference between relocating the line underground or overhead. Alternatively,
the Council could order a portion of the line segment underground while allowing some of it to remain
overhead.
To accommodate the required improvements,the amount of right of way from centerline varies from
75 feet along the plats to 50 feet on the properties to the east and 33 feet on properties to the west.
This creates several jogs in the right of way and leaves open the possibility for the east and west ends
to have future improvements when additional right of way is obtained,
DISCUSSION
Staff has reviewed the construction plans for the right of way improvements and has determined that
the estimated cost of placing the three-phase main line feeder underground throughout the project area
to be$173,300,including removals.
is
In comparison, the estimated cost to relocate the existing facilities and keep them overhead throughout
the project area is$56,600,including removals.
Normally,the funding source for the relocation of the facilities would be from electric revenues via
standard rates for the first$56,600 and via the Relocation Underground Charge fund for any excess
($116,700 est.)due to placing the facilities underground if so ordered by the Council. This is in
accordance with the Commission's relocation policy adopted in Resolution#742 Resolution
Establishing a Relocation Underground Charge dated November 3, 2003.
An alternative plan is to relocate the portions of the overhead line located east and west of the plats •
overhead,while placing underground only the portion of the existing line in the middle where we can
be more certain that the underground cables would not be affected by a future road project to improve
CR 16 to a four lane urban section,i.e. along the plats. The estimated cost to install a combination of
overhead and underground is$32,500 for the overhead section and$62,400 for the underground
section for a total cost of$94,900.
In the alternative plan,normally the funding source for the overhead portion's relocation cost of
$32,500 would be from electric revenues via standard rates as it would be for the first$24,100 of the
$62,400 cost to relocate the underground portion with the excess of$38,300 coming from the
Relocation Underground Charge fund for placing the facilities underground if so ordered by the
•
Council. This is in accordance with the Commission's relocation policy adopted in Resolution#742
Resolution Establishing a Relocation Underground Charge dated November 3, 2003.
However,should the Council order the entire line segment be placed underground staff suggests rather
than having the entire cost difference be funded by the Relocation Underground Charge the
Commission consider requiring Ryland to fund the difference for the portions east and west of their
plats since the underground facilities in those areas would be at risk to have to be replaced when CR 16
is further improved. This would result in the estimated cost to underground the entire line segment of
$173,300 being funded with$56,600 from electric revenues via standard rates, $38,300 from the
Relocation Underground Charge fund and the balance of$78,400 from Ryland.
RECOMMENDATION
Staff recommends the Commission accept the estimated costs and direct staff to forward them to the
Council to aid the Council in making their determination under the City's Right of Way Management
Ordinance whether or not to order none of the facilities,all of the facilities or a portion of the facilities
to be relocated underground.
Staff also recommends the Commission decide should the Council order the entire line segment to be
relocated underground that the added costs to do so for the portions east and west of the Ryland plats
be funded by Ryland or the Relocation Underground Charge fund.
•
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