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HomeMy WebLinkAbout[05-a] Sewer Study,ten , C.IT~' QF S'C,If1SN1'll Council Agenda Item 5 a MEETING DATE: March 5, 2009 AGENDA ITEM: Engineer Reports a. Comprehensive Sewer Study SUBMITTED BY: Engineering/Administration BOARD/COMMISSION/COMMITTEE RECOMMENDATION: PREVIOUS COUNCIL ACTION: For the past couple of years the City has been discussing the need to prepare a sewer study to determine the future infrastructure. This has been in the Capital Improvement Plan and has been ranked as a high priority. BACKGROUND INFORMATION: The City has identified the development along CR 2 and 194 as a high priority. Before the Planning process can begin, the sewer infrastructure needs to be planned. When the staff was meeting with Wells Concrete we ran into a similar situation, we do not have the infrastructure planned for in the Orderly Annexation Area. BUDGET/FISCAL IMPACT: $ 49,955 The expenditure will be covered through sewer access fees. ATTACHMENTS: Contract for services REQUESTED COUNCIL ACTION: Authorize the completion of the Comprehensive Sewer Study as presented. SEH February 27, 2009 RE: St. Joseph, Minnesota Comprehensive Sanitary Sewer Plan Update SEIi No. P-S"I'.IOE 106940 I Honorable Mayor and City Council c/o Ms. Judy Weyrens Administrator City of St. Joseph 25 College Avenue North PO Box 668 St. Joseph, MN 56374-0668 Dear Mayor and Members of the Council:: T(tis letter suppletneltts the Agreement for Professional Services between the City of St. Joseph, Owner, and Sltort Elliott Hendrickson Inc. (SEH®) dated July 1, 2006, and addresses providing services in comtection with preparing a 20-year Comprehensive Sanitary Sewer Plan update and wastewater computer model (hereinafter called the "Project"). Scope for 20-year Comprehensive Sewer Planning Project Understanding The recent comprehensive land use planning work performed by the City and the impending construction of County State Aid 1lighway 2 on the west side of town has reinforced the need to plan for future sanitary sewer collection system improvements. The last time the sewer collection system was evaluated in a comprehensive manner was in 1993 with the Comprehensive Sewer, Water, and Drainage Study. As such, we propose to prepare a Comprehensive Sanitary Sewer Plan update as well as to begin the first phase of development of a wastewater computer model to achieve the City's sanitary sewer planning goals. City and SEH staff have met to discuss the City's need for additional analysis of the sanitary sewer collection system, and we believe the proposed plan will be a valuable tool for the City in managing future improvements to the collection system. Some of the information and uses of the plan include: • Identifying the locations of future sewersheds and collection facilities for future annexation areas. Providing a loug range plan for wastewater system upgrades/expansion so that proposed construction projects include properly sized sanitary sewers to allow for future development needs. • Providing a document to support loan/grant applications for future needs of the sewer collection system. Short Elliott Hendrickson Inc., 1200 25th Avenue South, f?O. Box 1717, St. Cloud, MN 56302-1717 SEH is an cyual opportunity mnployer ~ www.sehinc.com ~ 320.229.4300 ~ 800.572.0617 ~ 320.229.4301 fax Honorable Mayor and City Council c/o Ms. Judy Weyrens February 27, 2009 Page 2 Scope of Services Task I -Data Collection, Review, and Analysis S1iH will utilize your existing sanitary sewer collection maps, GIS parcel data, and electronic topographic elevation and contour data to identify future sewershed boundaries. The planning areas that have been targeted for study include Districts 1, 2, 14, and 1 S as identified on Map 4-5 of the Comprehensive Land Use flan. W e anticipate it will be necessary for the City to purchase from Steams County an additional six (6) land sections of electronic contour/elevation data for the study area. Task 2 -Sanitary Sewer Collection System Computer Model A computer model of the proposed sanitary sewer collection system for the study area (Districts 1, 2, 14, and 15) will be developed using the MWHSoft InfoSWMM software to project wastewater flows. Data from the Comprehensive Land Use Plan and other GIS database files will be used to complete the framework and populate the model. We anticipate fuhire efforts would be dedicated to expanding the model to include the existing collection system and other growth areas not presently proposed to be studied. Ultimately, the completed model with the existing collection system and future growth areas would be a tool used to identify future improvements needed to expand the City's main pump station capacity_ SEH will use the proposed computer model to make recommendations for long range capital improvement planning and development of future trunk sewers to handle anticipated growth associated with changes in land use density, including: Identifying potential pipe sizes to accommodate future system flows Optimizing alignment and location of future pipes Determining the need, location, and preliminary capacity of future lift stations SEH will present the system model to staff and the assumptions used to prepare the final results. Output from the model will consist of pipe characteristics, required capacity, flow generation assumptions, peak flow factors, etc. Task 3 -Plan Preparation A succinct plan will be prepared which wiq incorporate all of the findings from the analysis and modeling with the bulk of the plan to be provided in the appendices of the report. Recommendations for future improvements will be reviewed with City staff and graphically depicted on a sewer system "road map" for the City to use in future planning. Planning-level opinions of probable cost will be prepared for the proposed trunk sewer improvements to allow the City to budget for the work. Recommendations for trunk sewer fees will be developed to help ensure file City collects adequate funding from developers. SEH will provide two hard copies and alt electronic Adobe .PDF file of the finished plan. Honorable Mayor and City Council c/o Ms. Judy Weyrens February 27, 2009 Page 3 Schedule Assuming a March 19, 2009, council authorization, we propose the following schedule: Data collection and review March 2009 Begin Future system planning and analysis April 2009 Create computer model and analysis May 2009 Draft report review with City staff May 2009 Council presentation June 2009 Compensation We propose to complete the work on anot-to-exceed Hourly basis plus the cost of reimbursable expenses including reproductions, mileage, and electronic contour background data from Stearns County. We propose a fee of $47,455 plus an estimated $2,500 in reimbursable expenses for a total of $49,955. Agreement if the work outlined in this document satisfactorily sets forth your understanding of our Agreement, please sign both copies in the space provided and return one copy to us. The signed letter shall serve as an accepted Agreement between the City of St. Joseph and SEH. We look forward to continuing our work witlt the City of St. Joseph on this important project. If you have any questions or need any additional information, feel free to contact me at 229.4348. Sincerely, SHORT ELLIOTT HENDRICKSON INC. V~ J / ~~~s.~ Randy Sabah, PE City Engineer djglcb Attachment c: Kate Henkemeyer, SZ1I-I p:Ipi~Skljoe110G41 DLrgree11A72709 jve,rens ccsp prnpoul.ppe Accepted by: City of St. Joseph, Minnesota 13y: Date: Authorized Client Signature _= r-.a =54 ~a€e`FP_ m ~ai'r Sn= :o V 8e€G=~oP& S` N ~c55 €~~~~~~ eu ~ _ ~ ~ ~ r r cs a \Z ~~ aaa o~N mu^m (^. N C] M lt) N C1 N Q F Q'` F ~ 'h y c gN C 0 a ~L: ~ Q avo C ~ ui G ~ z Z 1 za zW ~O a '~ x~ a w O W N I[ ryy(5.OS6'6Uw•50'101px..r[4 rwglvp-q WS~WWVI2Sl'JN<a Nl af[g1vv,2C wu',y,Jsw;uauwi-r~alylne.l.[.ri 'iu-.wn~n.