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Mr. Swearingen 12025 CIPP Lining Proposal for Engineering Services November 4, 2024 Sewer Interceptor Rehabilitation Phase IV, St. Cloud, MN TKDA assisted the City of St. Cloud with planning, design, and construction administration for the fourth phase in the City's efforts to rehabilitate its sanitary sewer interceptor system. The Phase IV system is a 10,000 linear foot 60-inch and 54-inch diameter reinforced concrete pipe that had experienced severe hydrogen sulfide corrosion. TKDA was retained by the City to develop a preliminary design plan to determine the most feasible method of pipe rehabilitation and then, following consensus on that determination, to implement the final design plans for bidding. Following the determination of the lowest qualified bidder, TKDA conducted construction administration throughout the construction phase. TKDA analyzed sewer tapes, record documents, field notes, stakeholder's lists, flow data, existing pipe characteristics, and preliminary construction cost estimates and made a recommendation to implement slip line pipe rehabilitation with some CIPP rehabilitation. The interceptor configuration was determined to be ideal for slip lining rehabilitation, although some CIPP rehabilitation along the route necessitated the bypassing of sewerage. TKDA designed the rehabilitation of the interceptor system with fiberglass pipe to be utilized as the insertion pipe material. Three slip line excavation locations were identified as potential locations where the contractor could begin the slip line effort. The City wanted this project to be completed in a short time frame. As such, TKDA maximized our in-house planning and design capabilities and completed the planning, design, and contractor prequalification process in about five months. III. SERVICES TO BE PROVIDED BY TKDA Work Plan A. Project Plans — TKDA will utilize GIS mapping to create mapping of the project area to communicate project limits and locations. We will review the sanitary sewer televising to determine if other repairs are needed ahead of the CIPP lining process. We will review service laterals for issues and count the number of service laterals that need to be re-established. Deliverables: GIS Plans Review Televising Report B. Project Manual — TKDA will review the City standard specifications for CIPP lining and modify the specifications for the 2025 CIPP Lining Project. A bid form will be created for the project and included in the project manual. Project Manual Deliverables: Advertisement for Bids Bid Form C. Bidding Services — TKDA will handle the bidding for the 2025 CIPP Lining Project including, QuestCDN coordination, bid questions and addenda, bid opening, bid tabulation, and bid recommendation letter. A letter will be drafted (mailed by the City) to communicate to residents within the project area. QuestCDN coordination Bidder Questions / Addenda (as needed) Deliverables: Bid Opening Bid Tabulation Bid Recommendation Letter Project Communication Letter D. Construction Administration and Construction Inspection — TKDA will handle all construction administration of the project, including contract document review, shop drawing review, payment applications, change requests, final payment, and project closeout document review. TKDA will also complete the construction inspection, assuming 30 days of work for this project. Construction inspection needs are dependent on the contractor's schedule and if additional hours are needed for this project, TKDA will work with the City of Arden Hills to revise the number of hours needed for inspection. TKDA will charge for only the hours needed for the project. To provide additional value, TKDA will utilize a trained Technician I for most of the inspection during the project, TKDA