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Nfnp <br />To:Athanasia LewisFrom:Kellie Schlegel <br />City of CentervilleStantec <br />Project/File:193807381Date:June 17 2025 <br />Reference: Well Number 1 Rehabilitation <br />The City of Centerville owns 2 municipal wells. Well 1 is located in McBride Memorial Park while well 2 is <br />located adjacent to City Hall. Routine inspection and maintenance of the water system components is an <br />important component of managing this critical infrastructure. A critical best practice for well maintenance is <br />to rehabilitate each well a minimum of once every ten years. Well maintenance consists of two primary <br />components: inspecting the pump/motor and conducting any needed repairs or pump replacement, and <br />televising the well/casing to assess the current condition. <br />Background: <br />Well 1 has been designated as an Ðemergency wellÑ for at least ten years by the Minnesota Department of <br />Health (MDH) due to the presence of sand in the well. As a result, the city cannot use well 1 to meet water <br />demand, and has relied solely on well 2 for this purpose. While well 2 has been able to meet the water <br />demand at most times, city staff has indicated that it does reach its maximum capacity during some peak <br />demand periods. If well 2 were to fail, well 1 does not have the capacity to meet the water demand, and the <br />city would need to also rely on its water interconnects with Lino Lakes. <br />Wells 1 and 2 are both due for standard maintenance. However, well 2 cannot be placed offline for this <br />maintenance until well 1 is removed from emergency status. Therefore, the rehabilitation of well 1 needs to <br />be completed before well 2 can be maintained. <br />Process and Estimated Costs: <br />The city must take several steps to complete the rehabilitation of well 1. The first step is for a licensed <br />engineer to prepare plans and specifications for the work. Next, as the Ðconstruction costÑ of this work may <br />exceed $175,000, the city must publicly advertise and receive bids for the work. The work must be <br />completed by a licensed well driller. Finally, the contractor will begin to assess the condition of the well and <br />pumps. To do this, the contractor must pull the pump, disassemble it, and clean and inspect the different <br />components of the pump and motor. In addition, they must clean and televise the casing and well to <br />determine the condition of the casing and the presence/approximate quantity of sand. <br />The estimated initial costs are summarized below: <br /> Preparation of plans and specifications/bidding: $ 15,000 (Stantec) <br /> General well/pump maintenance/condition assessment: $70K-$80K (Contractor) <br />39 <br /> <br />