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City of Decatur, Illinois <br /> Engineering Design Services—Scope of Work <br /> Basin 5 and 6 Sewer Separation <br /> October 11, 2022 <br /> OVERVIEW <br /> The City of Decatur"Basins 5 and 6 Sewer Separation Study- Oakland and Grand Area" Report <br /> was prepared by AECOM in June of 2022 and provided a basis for the final design. The <br /> recommended alternative is Alternative 3, as described in the report and which consists of a <br /> proposed separate storm sewer network which discharges into an existing 96-inch diameter <br /> sewer east of the Fairview Park Tennis Center. <br /> This Scope of Work for implementation of Alternative 3 identifies tasks that are herein used as <br /> the basis for AECOM's proposed fee. The tasks are assigned based on the relevant phase of <br /> design summarized below with additional detail in subsequent text in this document. <br /> 1. Conceptual Design <br /> a. Railroad Coordination/Permitting <br /> b. Research laterals (Fairview Ave. from Marietta St. to King St.) <br /> c. Investigation of missing flow (smoke testing, dye testing, etc.) <br /> d. Progress storm sewer routing and sizing <br /> e. Easement investigation <br /> f. Sanitary District of Decatur and Decatur Park District Coordination <br /> g. IDOT/TEPA Coordination/Permitting <br /> h. Confirm incorporation of Fairview Shopping Center <br /> i. 96" overflow sewer condition assessment and capacity evaluation <br /> j. Evaluate potential interconnect with storm between Waggoner St and Sawyer <br /> St. <br /> k. Investigate homes with roof drains connected to laterals. <br /> I. Opinion of Probable Construction Cost <br /> m. SRF application/support <br /> n. Topographic survey <br /> o. Geotechnical Engineering <br /> 2. 30% Design <br /> a. 30% design plans <br /> b. List of probable specifications <br /> c. Potholing for existing utilities <br /> d. Opinion of Probable Construction Cost <br /> 3. 90% Design <br /> a. 90% design plans <br /> b. 90% specifications <br /> c. IDOT/TEPA Coordination <br /> d. Opinion of Probable Construction Cost <br /> e. SRF application <br /> 4. Issued for Bid Documents <br /> a. Issued for bid plans <br /> 1 of 8 <br />