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_ DEPARTMENT OF THE ARMY ' CORPS OF ENGINEERS,OMAHA DISTRICT CAPITOL AVENUE OM RECEIvi:D • I OMAHA NE 68102-4901 IZc�✓ 1 REPLY TONOF DEC 26 201 DIVISION OF RECLAMgTION Planning, Programs, and Project Management Division MININGANDSAFETy -- V r. Peter S. Hays Colorado Division of Reclamation, Mining and Safety 1313 Sherman Street, Room 215 Denver, Colorado 80203 Dear Mr. Hays: The U.S. Army Corps of Engineers, Omaha District (Corps) has reviewed your letter dated November 26, 2018 (received November 30, 2018) regarding the environmental review of the Construction Materials Reclamation Permit Amendment filed by McAtee Construction Company for the Riverside Pit, (Permit No. M-1976-056-AM02), in Logan County, Colorado. It is understood that the proposed surface mining and reclamation operation would be located at Township 8N, Range 52W, Section 28 SE114, 6th Principle Meridian. The Applicant has requested to increase the current permitted area from 86.35 acres to 107.60 acres. Also, the Applicant has requested an amendment to the reclamation plan that will result in an increase to the surface area of ponds on site from the current area of 22.75 acres to 61.57 acres. The site is proposed to be reclaimed to its current industrial/commercial use upon completion of mining. We offer the following comments for your consideration: Your plans should be coordinated with the state water quality office that has jurisdiction within the area where the project is located to ensure compliance with federal and state water quality standards and regulations mandated by the Clean Water Act and administered by the U.S. Environmental Protection Agency. Please coordinate with the Colorado Department of Public Health and Environment concerning state water quality programs. If you have not already done so, it is recommended you consult with the U.S. Fish and Wildlife Service and the Colorado Division of Wildlife regarding fish and wildlife resources. In addition, the Colorado State Historic Preservation Office should be contacted for information and recommendations on potential cultural resources in the project area. Since the proposed project does not appear to be located within Corps owned or operated lands, your plans should be submitted to the local floodplain administrator for review and approval prior to construction. It should be ensured that the proposed project is in compliance with the floodplain management criteria of Logan County and