Agenda - Council - 01/26/2021 - Laserfiche WebLink

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Riverstone South EAW Draft — December 2020 wells have a combined permitted capacity to pump 6,800 million gallons of water per year (MGY) based on Minnesota DNR water use data (Table 6). Table 6. City of Ramsey Municipal Water Appropriation Permits Permit No. Well No. Permitted Volume (MGY) Average Use 2013-2018 (MGY) Maximum Use 2013-2018 (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 1985-6005 743832 850 89.1 161.6 1985-6005 743833 850 51.5 129.9 Total 600 646.9 1,020.6 During 2013-2018, these wells used a combined average of 646.9 MGY, indicating an available unused permitted volume of over 5,000 MGY. Based on past use and permitted capacity, the existing municipal wells have sufficient surplus capacity to serve the proposed project. A trunk water main will be extended from Riverdale Drive to serve the development area. Water flow, pressure, and storage will be adequate to serve the development area. As indicated under Item II.a.ii, the project is not located in or near a wellhead protection area. iv. Surface Waters a) Wetlands. Describe any anticipated physical effects or alterations to wetland features such as draining, filling, permanent inundation, dredging and vegetative removal. Discuss direct and indirect environmental effects from physical modification of wetlands, including the anticipated effects that any proposed wetland alterations may have to the host watershed. Identify measures to avoid (e.g., available alternatives that were considered), minimize, or mitigate environmental effects to wetlands. Discuss whether any required compensatory wetland mitigation for unavoidable wetland impacts will occur in the same minor or major watershed, and identify those probable locations. As discussed under Item 11.a.i., the project area does not include any surface waters, wetlands, streams, or channels. Wetlands and waters near the project area are generally regulated by the Lower Rum River Watershed Management Organization (LRRWMO), which administers the Minnesota Wetland Conservation Act (WCA) in the project area; the U.S. Army Corps of Engineers (USACE), which administers Section 404 of the Federal Clean Water Act (CWA); and the MPCA, which administers Minnesota water quality standards and Section 401 of CWA. The project will not involve physical effects on or alterations of any surface waters, wetlands, streams, or channels. 17