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Page 20 <br /> <br /> <br /> <br />Project development will include the extension of a public water main. The City of Elk River's <br />trunk water line is present east of the project area, at the intersection of 165 th Avenue NW and <br />Gateway Road NW. The project area is located within the urban service area boundary. <br /> <br />The Elk River Municipal Utilities (ERMU) operates the water system for the City of Elk River. <br />The ERMU operates “six water treatment plants, with capacity to treat eight million gallons of <br />water per day. In addition, ERMU has the capacity to store four million gallons of water in four <br />towers located throughout the City. ERMU also maintains more than 119 miles of water mains” <br />(5). <br /> <br />The ERMU currently serves 18,495 residents through 5,581 service connections, per the most <br />recent ERMU Wellhead Protection Plan (January 2023) (26). All eight production wells are <br />located within the drinking water supply management area (DWSMA), “which produce on a 5- <br />year average about 854.2 million gallons per year (2017-2021) from a deep, sandstone bedrock <br />aquifer” (26) (Table 18 and 19). <br /> <br />Table 18. Elk River Municipal Utilities Water Supply Well Information <br />Local <br />Well <br />ID <br />Unique <br />Number <br />Use/ <br />Status <br />Casing <br />Diameter <br />Casing <br />Depth <br />Well <br />Depth <br />Date <br />Constructed/ <br />Reconstructed <br />Aquifer <br />Well 2 255153 Primary 16 in. 136 ft. 290 ft. 08/1948 Mt. Simon <br />Well 3 221176 Primary 20x16 in. 201 ft. 315 ft. 10/1974 Mt. Simon <br />Well 4 481794 Primary 24x18 in. 197 ft. 225 ft. 12/1992 Mt. Simon <br />Well 5 537682 Primary 30x24x18 <br />in. 316 ft. 406 ft. 08/1994 Mt. Simon <br />Well 6 580320 Primary 24x18 in. 212 ft. 300 ft. 02/1999 Mt. Simon <br />Well 7 664852 Primary 24x18 in. 240 ft. 341 ft. 07/2001 Mt. Simon <br />Well 8 694499 Primary 30x24x18 <br />in. 264 ft. 390 ft. 06/2004 Mt. Simon <br />Well 9 757624 Primary 24x18 in. 296 ft. 454 ft. 01/2008 Mt. Simon- <br />Hinckley <br /> <br />Table 19. Annual Volume of Water Discharged from Water Supply Wells <br />Local <br />Well ID <br />Unique <br />Number <br />2015 2016 2017 2018 2019 <br />(millions of gallons) <br />2 255153 61.584 61.584 15.390 11.217 5.180 <br />3 221176 184.524 106.245 146.935 187.908 171.621 <br />4 481794 182.469 212.577 159.723 173.899 200.931 <br />5 537682 67.151 123.474 177.245 102.377 109.803 <br />6 580320 94.601 82.998 43.593 102.444 75.632 <br />7 664852 91.654 68.486 89.660 114.283 107.811 <br />8 694499 107.128 107.403 83.771 40.000 2.959 <br />9 757624 14.744 38.836 71.865 81.458 104.658 <br />