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01-08-18-R
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701 Xenia Avenue South | Suite 300 | Minneapolis, MN 55416 | (763) 541-4800 <br /> <br />Building a legacy – your legacy. <br />Equal Opportunity Employer | wsbeng.com <br />K:\010111-000\Admin\Contract\03 Proposal - Additional Scope\010111-000 - Arden Hills PMP additional Scope - Final.docx <br /> <br /> <br />December 29, 2017 <br /> <br />Ms. Susan Polka <br />Public Works Director/City Engineer <br />City of Arden Hills <br />1245 W Highway 96 <br />Arden Hills, MN 55112 <br /> <br /> <br />Re: City of Arden Hills ‐ 2018 Street and Utility Improvement Project (2018 PMP Project) <br />Scope of Services to Provide Additional Engineering for Indian Oaks Area Drainage Review <br /> <br />Dear Ms. Polka: <br /> <br />As requested, here is our estimated fee for the additional scope to evaluate the downstream hydraulic conditions <br />(on and north of Colleen Avenue) for the Arden Hills 2018 PMP project. This work is necessary in order to evaluate <br />increased peak flow rates leaving the wetland to reduce the flooding risks to the adjacent residents. <br /> <br />We have broken down the additional work into a 3‐step process. Steps will occur in sequential order. If it is <br />determined that increasing flow rates will increase downstream flood potential and improvements are not feasible <br />during or after Step 1, a memorandum will be prepared outlining why proposed improvements are not <br />recommended. Design options will be evaluated during step 1. If it is determined that the downstream system has <br />capacity and improvements are feasible then coordination will be necessary with Rice Creek Watershed District <br />(RCWD) to receive conditional approval prior to final design. Step 3 has the option to occur during a separate <br />project at a later time, however necessary improvements may need to be include in the 2018 PMP project to <br />reduce rework, such as an increased culvert under Indian Oaks Court and between the homes north of Indian Oak <br />Court towards Colleen Avenue. The estimated fee for Step 3 assumes that this work will be competed as part of <br />the Arden Hills 2018 PMP project. If the work is completed under a separate project this fee will need to be <br />reevaluated. <br /> <br />Step 1: Feasibility Study and Evaluation of downstream flooding potential. Estimated Fee $10,500 <br /> Included in Step 1: <br /> Survey of downstream channels, ponding areas, culverts, storm sewer, and low opening/entry <br />elevation of downstream buildings ‐ 16 Hrs <br /> Preliminary Wetland Delineation and Environmental Review ‐ 12 Hrs <br /> Record Drawing and Right of Way Research and Review ‐ 4 Hrs <br /> On‐Site Evaluation ‐ 4 Hrs <br /> Analysis and Modeling of downstream flooding potential including conveyance systems, <br />wetlands, and ponding areas. ‐ 32 Hrs <br /> Evaluation of preliminary design options for proposed improvements (If <br /> Necessary). ‐ 12 Hrs <br /> Engineer’s Opinion of Probable Construction Costs. ‐ 5 Hrs <br /> Recommendation or Feasibility Memorandum Preparation ‐ 12 Hrs <br /> <br />Step 2: Coordination with RCWD and MNDOT. Estimated Fee $5,500 <br /> Included in Step 2: <br /> Completion of Wetland Delineation and Environmental Review – 15 Hrs <br /> Memorandum Preparation for Agencies ‐ 8 Hrs <br /> Meetings with RCWD ‐ 12 Hrs
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