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Trott Brook Crossing EAW August 2021 <br />iii. Water Appropriation. Describe iftheprojectproposes to appropriate surface or groundwater <br />(including dewatering). Describe the source, quantity, duration, use and purpose of the water <br />use and ifa DNR water appropriation permit is required. Describe any well abandonment. If <br />connecting to an existing municipal water supply, identify the wells to be used as a water source <br />and any effects on, or required expansion of, municipal water infrastructure. Discuss <br />environmental effects from water appropriation, including an assessment of the water resources <br />available for appropriation. Identift any measures to avoid, minimize, or mitigate environmental <br />effects from the water appropriation. <br />Surface/Groundwater Appropriations and Dewatering <br />Project construction may require temporary dewatering and groundwater appropriation to facilitate <br />installation of sanitary sewer and excavation of storm ponds. The project will not involve <br />installation of new water wells. Project construction will require a MN DNR water appropriation <br />permit if dewatering required for installation of utilities exceeds 10,000 gallons/day or 1 million <br />gallons/year. The extent and duration of temporary construction dewatering needed is currently <br />unknown. Construction dewatering may be unnecessary. Groundwater appropriated for construction <br />dewatering will be discharged to temporary sediment basins within the project area. It is not <br />anticipated that construction dewatering will be extensive or continue long enough to affect nearby <br />domestic water wells. <br />Well Abandonment <br />The project area does not include any existing registered wells according to the Minnesota Well <br />Index (Table 9, Appendix D). However, one unregistered well was found in the central portion of <br />the site during the land survey for the property. The project proponent will ensure the well is <br />abandoned in compliance with MDH requirements prior to project construction as noted under Item <br />l l.a.ii. <br />Connection to a Public Water Supply <br />The project will be connected to the City of Ramsey municipal water supply. The City of Ramsey <br />draws its public water supply from the Tunnel City-Wonewoc aquifer. The City currently maintains <br />eight municipal wells with a permitted capacity to pump a total of 850 million gallons of water per <br />year (MGY) based on Minnesota DNR water use data (Table 10). The Ramsey Water Supply Plan <br />projects that the permitted volume of 850 MGY will not be exceeded until between 2025 and 2030. <br />Table 10. City of Ramsey Municipal Water Appropriation Permits <br />Permit No. <br />Well No. <br />Annual <br />Permitted <br />Volume (MGY) <br />Annual Average Use <br />2013-2018 (MGM <br />Annual Maximum <br />Use 2013-2018 <br />(MGY) <br />1985-6005 <br />161441 <br />850 <br />113.8 <br />144.3 <br />1985-6005 <br />416183 <br />850 <br />0.9 <br />5.5 <br />1985-6005 <br />580303 <br />850 <br />88.2 <br />164.9 <br />1985-6005 <br />580313 <br />850 <br />124.2 <br />194.0 <br />1985-6005 <br />593672 <br />850 <br />56.3 <br />82.3 <br />1985-6005 <br />706840 <br />850 <br />122.9 <br />138.1 <br />18 <br />