2025-12-11 WS & CC Packet - Laserfiche WebLink

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Nfnp To:Athanasia LewisFrom:Kellie Schlegel City of CentervilleStantec Project/File:193807350Date:December 4, 2025 Reference: Centerville and Lino Lakes Water Supply Interconnects Background: The City of Centerville and the City of Lino Lakes have two interconnections between their respective water distribution systems. These interconnections serve as an emergency back-up to each community’s water supply. An Interconnect Agreement, dated January 9, 2019, stipulates ownership, maintenance, and other standards and requirements of the two interconnections. In 2023, approximately 25 million gallons (MG) of water flowed from Lino Lakes to Centerville through one of these interconnections. Per the agreement, there are two mechanisms for repayment of the water: Centerville may provide Lino Lakes with an equivalent amount of water; or, if Centerville does not have the capacity to do this, they may reimburse Lino Lakes monetarily in an amount equal to 80% of Lino’s residential water rate for the amount of water received. Reimbursement via Water: The City of Lino Lakes prepared a technical memorandum (attached to this memo), that outlines several concerns and constraints regarding Centerville’s ability to provide them with water. The memo discussed two scenarios: providing water to the entirety of Lino Lakes, and providing water only to the Watermark Development within Lino lakes. We have reviewed that memo and offer the following comments. Capacity within Centerville’s Water System: The City of Centerville does not have the capacity within its system to supply the entire City of Lino Lakes with water. However, the City of Centerville does have additional capacity within its system to supply water to the Watermark development, but only during non- peak months (i.e. during the winter). Repayment of the required volume of water would take approximately 6 months, meaning it would need to start almost immediately in order to repay the water prior to the peak summer watering period. Lino Lakes also indicated that all repayment must be completed by the fall of 2026 so as not to interfere with the startup of their new Water Treatment Plant. Water Quality: Centerville’s Manganese levels currently fall below the 0.1 mg/L threshold, and the water supply falls within acceptable ranges for other contaminants. Fire Flows: Lino Lakes’ model predicts that the available fire flows would decrease if served by Centerville. Hydrant flow tests, static pressure readings, along with a water system model could be used to confirm actual fire flows. The City will need to coordinate with the Lino Lakes Fire Department to determine what 22