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Home My WebLink About4.C.1. Approval of Additional Professional Services for Lift Station L-16 Sewage Grinder Installation �� Consent Business 4. C. 1. �t�r��r�c�i�F�f� TO: Mayor and City Council Mark McNeill, City Administrator FROM: Bruce Loney, Public Works Director DATE: 07/16/2013 SUBJECT: Approval of Additional Professional Services far Lift Station L-16 Sewage Grinder Installation (E) UPDATED Action Sought Autharize the Execution of an extension agreement with WSB & Associates, Inc. for additional professional services at a cost not to exceed $39, 138.00 for Lift Station L-16 Sewage Grinder Installation. Background Previously the City authorized an extension agreement with WSB & Associates, Inc. to design a lift station grinder installation at L-16. The cost of this service was not to exceed $15,383.00. During the design, it has been determined that bypass pumping will be necessary to install the grinder. Also, it has been determined that a 24" cast iron pipe will need to be lined, air vacuum release structures No. 1 & 2 & 3 & 4 need replacement and redesign of the access openings and this work needs to be done during bypass pumping. This additional work is necessary for proper operation and for emergency response if there is an equipment failure in the structures. Staff also believes that the ductile iron pipe under the Mill Pond needs to be cleaned and televised to insure proper operation and to assess the condition of this pipe. These additions are being added since expensive bypass pumping is needed to install the grinder and necessary for the previously described additional work. Recommendation Staff would recommend adding this additional work to L-16 and associated structures and forcemain for operation of the system and for emergency response when necessary. Budget Impact This work will be paid out of the City's Sanitary Sewer Fund. Relationship to Vision This supports goal E: Deliver effective and efficient public services by a staff of well-trained, caring, and professional employees. Requested Action Authorize the execution of an extension agreement with WSB & Associates, Inc. for additional professional services at a cost not to exceed $39, 138.00 for Lift Station L-16 Sewage Grinder Installation. Attachments: MAP WSB Extension A�reement i EDEN PRAIRIE EDEN PRAIRIE ryN � p �ry AIR & VA • RELEA INSPECT? ' "UCTURE , �0�, C 0 U LIFT c STRUCTUR iNO. 1 \ N0. 5 i j c0U c '' STATION AIR, VACUUM Ra • Z il 1.16. 2 `� . SIR.>re RE • Ea.EASE TURE N0 INSPECT)r •1. COUNTY IZ / NO. \ R n COUNTY / R Q 1 5 ® _ MINNESOTA IA E / -- ". e 1 ,, �U' - 1 -- - - _/ �' � . END 16 / 30 r c n % INSPECTION STRUCTURES FORCEMAW r` - 0 . .U.p ` r� . � ® b N0 3 & O. 4 N ,r. .•.t .>r .,• '\c DISCHARGE TO ° O y� p 16 DIAMETER q w \� INTERCEPTOR J am - ''a r t t a 11 51, 5 y f r-h p d FORCEMAIN El --- A fk-' 1 Ei V- t 7, zrar- 1 SEWER -''''- ' V n`. , ' I� I ,I _.,t �` v .ter —:; r -- - �_ J � .s .�- __ - 69 -- .. (tIcAstl .„,.. , "____-________-----,---,-,,,'-------iirs' , 1� /' `. •� \ I - C,... 1 .°' ✓r@ 7 � ." , ° . rx lug „,: -� = �� o +w�' ; ''0 x p � \; v ...,,T.- — 41 P i 1 65 6 i ' /'d p ..c , E , -- / l;. /� , j AN LAK T . w ,, � > � Y / K[ a. r= _ o to 0 ET 1000 2000 WSB Prgetl No 01275 CO0 DATE W B 701Nene Avenue South SokWO SHAKOPEE INTERCEPTOR Moyne, N• MN 5541E ow •�•w�° Figure Number LIFT STATION L16 • 11.1 MO EMERGENCY OPERATING PLAN 2 ___-1 nAVncKCI01wwT1a1 — _. - w,9JSOWtCadedol u`FlL 1 < . I+f9.t 7117 2o, 74704 M+ WSB Engineering • Planning ■ Environmental • Construction 701 Xenia Avenue South Suite 300 Minneapolis, MN 55416 Tel: 763 -541 4800 Fax: 763 -541 -1700 July 8, 2013 Mr. Bruce Loney, PE Director of Public Works /City Engineer Public Works Department 400 Gorman Street Shakopee, MN 55379 Re: Proposal for Additional Professional Services for Lift Station L16 Sewage Grinder Installation, City of Shakopee, MN Dear Mr. Loney: WSB & Associates, Inc. (WSB) is pleased to submit this proposal to provide additional design and construction- related engineering services for the additional scope of work in conjunction with the sewage grinder installation at Lift Station L16. Only one construction contract is anticipated. Therefore, there will be no additional bidding services in addition to those originally proposed. Attached to this letter is Exhibit A – Scope of Work which provides background information, WSB's approach to engineering services for the additional scope of work to be completed and the additional professional services. Compensation for services to complete the project will be in accordance with the hour estimates outlined in Exhibit B, and according to WSB's agreement for professional services with the City of Shakopee. WSB Project Team • Tom Roushar, PE – Project Manager • Barritt Lovelace, PE— Structural Engineer • Kevin Kawlewski, PE Project Engineer • George Bender, PE— Project Engineer Tom Roushar will serve as Project Manager and will be assisted by Kevin Kawlewski and George Bender. Barritt Lovelace will provide structural engineering expertise. Schedule WSB proposes to submit 100% complete drawings, specifications, and bidding documents for review within 30 days. Services related to bidding will be provided in accordance with the City's schedule. Construction- related engineering services will be provided in accordance with the successful bidder's schedule. 11 flu. t.. flv. i. Pt ,'(...'.4v:n.r.d6.aw.Pr.gv.ull PR. ■PA kn.% 01411.15 I 14 Snygs 4isukr l, ROW 1Mnr. ldJNwav/Srnret +;1 .4•< Mr. Bruce Loney, PE July 8, 2013 Page 2 This letter proposal represents our understanding of the project scope. The City of Shakopee agrees to reimburse WSB & Associates, Inc. for these services in accordance with Section IV of the Agreement for Professional Services. If this agreement meets your approval, please sign below and return one copy to our office. Thank you for your consideration. Sincerely, WSB & Associates, Inc. Thomas A. Roushar, PE Senior Project Manager ACCEPTED BY: City Administrator Mayor Date N Shady, 1 V4 C Gender G.3114.n Prop.,al PROP-55.5 OVP(13 446 + age G ..dn Gwdfa .ldr►r«sufS,w,cn c.r.a6c EXHIBIT A ADDITIONAL SCOPE OF' WORK ORIGINAL SCOPE OF WORK Lift Station L16, constructed in 1998, is a modern, submersible lift station that is in excellent condition. Although the lilt station is in good condition with all of its major components either reconditioned, new, or current state -of -the art, the pumps and check valves are subject to chronic plugging with rags. The original scope of work included the installation of a sewage grinder in the upstream manhole (diversion structure) at the toe of the flood protection dike. The grinder will eliminate the plugging problem. In addition to the sewage grinder, the original scope of work included the installation of a slide gate in the diversion structure. The gate will be advantageous during wet well cleaning to temporarily stop flow to the lift station. With flow temporarily stopped, the wet well can he completely pumped down to facilitate a thorough cleaning and visual inspection. ADDITIONAL SCOPE OF WORK Need for Bypass Pumping Review of the record drawings of the diversion structure and subsequent field inspection resulted in the conclusion that invert work will be required which necessitates bypass pumping around the diversion structure to allow the invert work to proceed and the new concrete to cure. 24" Cast Iron Pipe Gravity Sewer Lining When the Metropolitan Council Environmental Services constructed Lift Station L16, new gravity influent sewer was installed with the exception of a 30 -foot segment of cast iron pipe (CIP) immediately downstream of the diversion structure. This segment of CIP was installed when the City of Shakopee wastewater treatment facility was constructed in 1961. Therefore, this pipe segment has been in service for over 50 years. Due to the fact that the segment is CIP, external corrosion could be occurring. To prevent potential pipe failure, the 30 -foot segment should be lined. To minimize loss in cross - sectional area, cast -in -place pipe (CIPP) lining is desirable. CIPP lining requires bypass pumping to allow the new liner to cure. As noted above, bypass pumping will be required to install the grinder and slide gate. Considering that the bypass pumping will be in- place, anyway, the City will save money if the bypass forcemain is extended downstream of the 30 -foot segment and it is CIPP lined as as part of the grinder /slide gate installation project. Air /Vacuum Release Structure No. 1 Valve Replacement /Modifications This structure is located immediately downstream of Lift Station L16. The two 16" shut -off valves are inoperable and should be replaced. Also the 16" tee should be replaced to ensure a leak -free installation. Currently the structure is accessible only through manhole openings. To facilitate valve and tee replacement and to improve future accessibility, the existing top slab should be replaced with a new top slab and access hatch. E3ecause the structure is in a roadway, the access hatch must accommodate wheel loading. As noted above, bypass pumping will be required for the grinder /slide gate installation and the 24" CIP CIPP lining. Because it will be necessary to bypass structure no. 1 to replace the valves and tee, the City will save money by extending the bypass forcemain past structure no. 1 and If vns.yw s 'Pt C ,....ar i, x , , i , ., ✓ PRO ?A hwv-VO411.LV i ia.r. n M „a. n„r lt.nt.M I.NIIe. d k/i r! Jot Exhibit A — Additional Scope of Work July 8, 2013 Page 2 include the structure no. 1 valve replacement /modifications in the grinder /slide gate installation project. AirNacuum Release Structure No. 2 Valve Replacement /Modifications This structure is located further downstream of air /vacuum release structure no. 1. Like structure no. 1, the two 16" shut -off valves are inoperable and should be replaced. Also, like structure no. 1, the 16" tee should be replaced to ensure a leak -free installation. Finally, as is the case with structure no. 1, the existing top slab should be replaced with a new top slab and access hatch. Because it will be necessary to bypass structure no. 2 to replace the valves and tee, the City will save money by extending the bypass forcemain past structure no. 2 and include the structure no. 2 valve replacement /modfications in the grinder /slide gate installation project. Clean -out Structures No. 3 and No. 4 Modifications The Lift Station L16 forcemain crosses under the Mill Pond on the north side of County Road 101. Clean -out structure no. 3 is to the west of the Mill Pond with clean -out stntcture no. 4 to the east. Because of the steep, rip - rapped slopes and the fact that a portion of the forcemain is under water, repair of a forcemain break through the Mill Pond area would be difficult and time - consuming. In recognition of this, the Lift Station L16 Emergency Operating Plan recommended that the clean -out stnictures be modified to permit the installation of a temporary emergency forcemain laid on the ground, across the bridge in the event of a forcemain break in this area. The scope of work related to the clean -out structures no. 3 and no. 4 modifications includes the following items of construction: • Replacement of existing top slabs with manhole openings with new top slabs and access hatches • Extension of clean -out structure no. 4 • Piping modifications to permit attachment of temporary forcemain Jetting and Televising of Mill Pond Forcemain The Mill Pond forcemain was constructed of ductile iron pipe. Therefore, pipe corrosion is a concern. Also, because of the steep pipe profile on either side of the Mill Pond, it is the segment of forcemain most likely to have deposition of grit. Extending the bypass forcemain to past clean -out structure no. 4 will allow jetting and televising of this segment. It is advisable to do so as part of this project because it will save the City considerable money as opposed to doing so as a separate project. PROJECT APPROACH Preliminary Design Phase WSB has obtained and reviewed record drawings of the following items: • 24" CIP influent gravity sewer • Air /vacuum release structure no. 1 • Air /vacuum release structure no. 2 It .wa.y, a sPIee.ak.ea,r x.a,:a r MOO/ a .ra. i, /A t / ..,,K. , ;.,,w., taltdtrnar !Almond txnete■ -., lee Exhibit A Additional Scope of Work July 8, 2013 Page 3 • Clean -out structure no. 3 • Clean -out structure no. 4 • Mill Pond forcemain In addition, WSB has conducted a preliminary inspection of each of the structures. During the preliminary design phase, WSB will field verify the dimensions and depths of each structure. Also, we will field verify the sizes and dimensions of all piping inside the structures. WSB will review alternative routing for the bypass forcemain with City staff Following alignment selection, WSB will survey the selected alignment. Final Desizn Phase During final design, drawings, specifications, and bidding documents will be developed for the following items which will be in addition to the grinder and slide gate installation which was the original scope of work: • Bypass pumping system • Bypass forcemain • 24" CIP CIPP lining • Air /vacuum release structure no. I valve replacement/modifications • Air /vacuum release structure no. 2 valve replacement /modifications • Clean -out structure no. 3 modifications • Clean -out structure no. 4 modifications • Mill Pond forcemain jetting and televising The 100% complete documents will be submitted for staff review. A review meeting will then be held to gather staff comments and answer questions. Any requested revisions will then be incorporated into the final drawings, specifications, and bidding documents. An opinion of probable construction cost will be prepared during final design. The project cost will he in excess of $100,000 which will require competitive bidding. Bidding Phase WSB will administer the bidding process on behalf of the City of Shakopee. Specific tasks to be completed for this phase of the project are outlined below under Scope of Work. Construction Phase WSB will provide construction - related engineering services for the project. Specific tasks that will be completed are outlined below under Scope of Work. t.asea r �e:r! (r,,m,),,..dit .vP,,rm MOP at..-fl4fItb n+...,g.n.,Rd ,:tobt Exhibit A — Additional Scope of Work July 8, 2013 Page 4 SCOPE OF SERICES The following tasks will be completed in conjunction with the project: Task 1: Preliminary Design Phase WSB will complete the following tasks during preliminary design: • 1.1 Field verify dimensions and depths of each structure. • 1.2 Field verify sizes and dimensions of all piping in the structures • 1.3 Review alternative bypass forcemain alignments with City staff • 1.4 Survey selected bypass forcemain alignment Task 2: Final Design Phase WSB will complete the following tasks during final design: • 2.1 Prepare and submit 100% complete drawings, specifications, and bidding documents • 2.2 Attend review meeting • 2.3 Prepare final drawings, specifications, and bidding documents • 2.4 Prepare final opinion of probable construction cost Task 3: Bidding Phase WSB will administer the bidding process on behalf of the City by completing the following tasks: • 3.1 Prepare advertisement for bids • 3.2 Distribute drawings, specifications, and bidding documents • 3.3 Arrange for and conduct a field tour of the project for prospective bidders • 3.4 Prepare and distribute addenda as required • 3.5 Review bids and make recommendation for award Task 4: Construction Phase WSB will complete the following tasks during construction of the project: • 4.1 Post bidding services, organize and attend the pre - construction meeting • 4.2 Review and process shop drawings and submittals • 4.3 Address contractor questions and respond to RFIs • 4.4 Prepare payment estimates • 4.5 Perform periodic site visits • 4.6 Prepare final completion punchlist • 4.7 Prepare final acceptance letter • 4.8 Prepare record drawings and final close -out paperwork H %Amber.e 1 SP( Cfwwk. Aconite *Prorta PROP 6 Am, (0ht /.f.LS L14 S'n.gr <iiwrkrImaalfxmw 1414..1 *ewes!:.. Exhibit A — Additional Scope of Work July 8, 2013 Page 5 • 4.9 Assemble an operation and maintenance (O &M) manual consisting of manufacturer supplied O &M information. • 4.10 Arrange for operator training CITY'S TASKS The City's tasks related to this project will include: • Designate a contact person • Provide available pertinent information • Provide input and answer specific project questions • Review 100% complete drawings, specifications, and bidding documents • Provide project inspection • Attend meetings and operator training 11 *darer S.sPt CG.ta,ler M.npowr haf.W PRO dk+w..- CtrsISJ.%[16.S.+4v Guder Mo«Murrr tdAaro+.J 4nxex •;..A.c EXFIIBIT B FEE ESTIMATE WSB's fee estimate appears on the attached spreadsheet. 1/ .6duryr nor,ir. F.,wwl 1101•h waves 01■13 -IS 14 .,. . linear. knobs., .1.LFouW.Vnwev... . c ESTIMATE OF HOURS AND COST FOR PROFESSIONAL SERVICES TO COMPLETE ADDITIONAL SERVICES Yv' q SB FOR LIFT STATION L16 SEWAGE GRINDER INSTALLATION - 5 SHAKOPEE Labor Category and Estimated Hours per Task I Description Project Project Structural I Total Total Labor CAD Tech Survey Crew Clerical Task Manager Engineer Engineer Hours Cost 1 Preliminary Design Phase 12 16 12 16 8 4 68 $ 8,372.00 2 Final Design Phase 12 40 24 80 12 168 $ 18,660.00 3 Bidding Phase 0 $ - 4 Construction Phase 8 60 8 10 8 8 102 $ 12,106.00 Total Estimated Hours 32 116 44 106 16 24 338 Hourly Billing Rate $ 142.00 $ 117.00 $ 142.00 $ 99.00 $ 149.00 $ 79.00 Total Cost by Labor Classification $ 4,544.00 513,572.00 $ 6,248.00 $ 10,494.00 $ 2,384.00 $ 1,896 -00 $ 39,138.00 ; Direct Expenses Total Estimated Fee . _ _ -- - -..- -- - - -- -- - -- 1 $ 39,138.00 � H \Srstittovort & SPUC',Gnnoer tnstauatton ProposanCopy of Aaatronai Sarnces for Savage Gnnoer lnstrUatton Spreaesr,eet AsFw