2015-05-28_REVISION - M1979097 - Laserfiche WebLink

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COLORADO Division of Water Resources " Department of Natural Resources 1313 Sherman Street, Room 821 Denver, CO 80203 Response to Reclamation PfgaiI Amendment Application Consideration DATE: May 28, 2015 TO: Eric C. Scott, Environmental Protection Specialist WL CC: Division 1 Office, District 3 Water Commissioner FROM: Sarah Brucker, P.E.A51 RE: East Rigden Pit, File No. M-1979-097-AM01 Applicant/Operator: City of Fort Collins Contact: Donnie Dustin, City of Fort Collins Utilities, (970) 416-2053 Sections 21, 27, and 28, Twp 7 North, Rng 68 West, 6th P.M., Larimer County CONDITIONS FOR APPROVAL ❑ The proposed operation does not anticipate exposing groundwater. Therefore, exposure of ground water must not occur during or after mining operations. ® The proposed operation will consume ground water by: ❑ evaporation, ® dust control, ❑ reclamation, ❑ water removed in the mined product, ❑ processing, ❑ other: ❑ The applicant has indicated plans to use other water at the permit site for the following purposes: ❑ dust control, ❑ reclamation, ❑ processing, ❑ other: COMMENTS: The East Rigden Pit is a surface mining operation on a total of 518 permitted acres. The application seeks an amendment to change the post -mining land use from pasture/open space to wildlife habitat and developed water resources. The East Rigden Pit Substitute Water Supply Plan (WDID 0302570) covers depletions at the site due to dust control use and past mining and dewatering operations and is currently valid through February 29, 2016. The liner for the Rigden Storage Reservoir (WDID 0303326) was approved as meeting the design standard in a letter dated May 20, 2015 and the Rigden Storage Reservoir is now classified as a lined reservoir. The site must continue to be included in a valid substitute water supply plan or court -approved augmentation plan until such time as all lagged depletions have been replaced to the satisfaction of the State Engineer, Division Engineer, and water commissioner. Any storm water runoff intercepted by this operation that is not diverted or captured in priority must infiltrate into the ground or be released to the stream system within 72 hours. Otherwise, the operator will be required to make replacements for evaporation. This office has no objection to the proposed amendment. The applicant may contact the State Engineer's Office with any questions. 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 F 303.866.3585 www. water. state. co. us ,CANNED