08-25-25 - City Council Agenda - Laserfiche WebLink

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Do c u m e n t P a t h : M : \ 0 2 8 6 5 9 - 0 0 0 \ G I S \ M a p s \ M a i n S t r e e t \ W a t e r S u p p l y D a t e S a v e d : 7 / 2 3 / 2 0 2 5 ¯1 inch = 600 feet 0 600 FeetMain Street Master Plan City of Lino Lakes, MN Water Supply 600 Feet Watermain 8 10 12 1 16 Proposed Watermain 10 12 16 !®Water 7oZer !<Well City %oundary SCENARIO 2 - UTILITIES WATER SUPPLY The City’s drinking water supply system includes production, treatment, storage, and distribution. The e[istinJ Zater production capacity Zill not Ee sufÀcient to serve the entire study area. It is anticipated that not more than half of the study area could be served by the City’s existing system assuming the proposed Well No. 7 is constructed in 2026. The City will need to install new wells (Wells No. 8 and 9) to serve the entirety of the study area and satisfy City-wide water demands. The City’s Department of Natural Resources (DNR) water appropriation permit currently allows an annual withdrawal volume of 900 million gallons per year (MGY). The City-wide annual demand plus the projected annual demand for the study area will exceed this volume. Therefore, the City’s DNR appropriation permit annual withdrawal volume will need to be amended prior to full build out of the study area. The City is constructing a water treatment plant for manganese removal which will be placed in service in the fall of 2026 and will provide adequate treatment capacity through Well No. 9. The City’s total elevated storage volume is 3.5 million gallons (MG), which is projected to be sufÀcient for the entire study area $s shoZn on the Water Supply ÀJure, the e[istinJ watermains in the vicinity of the study area include a 12- inch diameter ductile iron pipe (DIP) watermain along Robinson Drive and Century Trail south of the study area, 8-inch DIP watermain on Carl Street (west cul-de-sac), 10- inch DIP watermain stub for the Robinson Property off of Cardinal Way, and two 12-inch DIP watermain stubs at the intersection of Robinson Drive and Century Trail. Water distribution in the study area will include watermain loops varying in size from 8-inch to 12-inch diameter. A preliminary conceptual trunk watermain layout for the Gateway Village scenario is shown on the Water Supply ÀJure 7he larJer 12-inch diameter trunk Zatermain is looped through the high density residential and commercial areas to provide redundancy and available Àre ÁoZ Connection to the e[istinJ Main Street trunk Zater main at Wood Duck Trail should be evaluated as part of improvements south of Main Street. The exact alignment and si]inJ of Zatermains Zill need to Ee conÀrmed durinJ preliminary design. Pressures in the study area will vary from 55 to 65 psi, and availaEle Àre ÁoZs adMacent to trunk watermains will exceed 3,500 gallons per minute (gpm). All proposed units will be required to connect to the City’s water system. PINE STREET 4T H A V E N U E SU N S E T A V E N U E CARL STREET CENTURY T R A I L ROBINSON DRIVE MAIN STREET MAPPING NORTHWEST MAIN - MAIN STREET MASTER PLAN AUGUST 25, 2025 PREFERRED DEVELOPMENT SCENARIO | 33Page 87 of 171