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BOLTON & MENK Real People. Real Solutions. October 21, 2021 Mr. Bruce Westby, P.E. City Engineer City of Ramsey 7550 Sunwood Drive NW Ramsey, Minnesota 55303 7533 Sunwood Drive NW Suite 206 Ramsey, MN 55303-5119 Ph: (763) 433-2851 Fax: (763) 427-0833 Bolton-Menk.com RE: Proposal for Engineering Services — Riverstone South Lift Station & Riverdale Drive Trunk Utilities Project Dear Mr. Westby: Bolton & Menk, Inc. appreciates the opportunity to submit this proposal for professional engineering services related to the above referenced project. The project includes construction of a lift station, valve vault, and forcemain within the Riverstone South Development. Additionally, sanitary sewer, watermain, and storm sewer are proposed along the future Riverdale Drive alignment. SCOPE A summary of the primary project components is presented below: Lift Station Site — The site is located within the southeast portion of the Riverstone South development area. Lift Station - A wet well structure will be installed to capture sanitary sewer flow from the Riverstone South development, along with areas to the east of the lift station site. The future sanitary sewer line to the east is estimated at approximately 30 feet deep. The bottom of the lift station will be approximately 4 to 6 feet lower, or 34 to 36 feet deep. Valve Vault — The structure will be placed near the lift station. Forcemain — The proposed forcemain will be installed through the Riverstone South development, ultimately connecting to a trunk gravity sewer main proposed in Riverdale Drive. The estimated length of forcemain is 2,360 feet. Final sizing of the forcemain will be completed as a portion of the project design. We will work with the developer to determine the location and elevation of the forcemain through the development. Site Improvements — Improvements at the site will include a paved access drive and maintenance pad. We will work with the developer to prepare a site grading plan. Trunk Watermain — The proposed watermain improvements are derived from the 2040 Comprehensive Plan and include extending a 12" watermain along the Future Riverdale Drive from Llama Street to Bowers Drive. Trunk Sanitary Sewer — The proposed trunk sanitary sewer improvements will include a connection to the existing 18" sanitary sewer main at Llama Street. The sanitary sewer main will Bolton & Menk is an equal opportunity employer.