Agenda - Council - 12/14/2021 - Laserfiche WebLink

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