Laserfiche WebLink
DEPARTMENT OF THE ARMY <br />- CORPS OF ENGINEERS, OMAHA DISTRICT <br />1616 CAPITOL AVENUE <br />OMAHA NE 68102.4901 <br />REPLV TO <br />ATTENTION OF January 24, 2018 <br />Planning, Programs, and Project Management Division <br />Mr. Michael A. Cunningham <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Dear Mr. Cunningham. <br />RECEIVED <br />FEB 0 6 Z018 <br />DMSION OF RECLAMATION <br />MINING AND SAFETY <br />The U.S. Army Corps of Engineers, Omaha District (Corps) has reviewed your letter <br />dated January 5, 2018 (received January 11, 2018) regarding the Hard Rock/Metal Mining <br />Materials Reclamation Permit Amendment Application Consideration for the Colorado <br />Milling Company, LLC, in Boulder County, Colorado. It is understood that the proposed <br />amendment to the Gold Hill Mill Permit No. M-1994-117-AM01 would formally add the <br />previously permitted Left Hand Creek pump station, Gold Hill Mill pipeline and Times Mine <br />adit portal to the affected land boundary of the Gold Hill Mill Permit. We offer the following <br />comments for your consideration: <br />Your plans should be coordinated with the state water quality office that has jurisdiction <br />within the area where the project is located to ensure compliance with federal and state <br />water quality standards and regulations mandated by the Clean Water Act and administered <br />by the U.S. Environmental Protection Agency. Please coordinate with the Colorado <br />Department of Public Health and Environment concerning state water quality programs. <br />If you have not already done so, it is recommended you consult with the U.S. Fish and <br />Wildlife Service and the Colorado Division of Wildlife regarding fish and wildlife resources. <br />In addition, the Colorado State Historic Preservation Office should be contacted for <br />information and recommendations on potential cultural resources in the project area. <br />If construction must occur in the floodplain, it must be located outside the floodway. If a <br />floodway has not been determined and designated, the construction should be as far from <br />the stream channel as possible. The goal of any construction in the floodplain is to achieve <br />the highest level of flood protection with zero impact to adjacent property. <br />If the proposed waterline construction crosses the floodplains of small drainageways and <br />streams, flood -related problems should not occur if the lines are buried far enough below <br />the beds of drainageways and streams to prevent exposure due to streambed erosion <br />during periods of high floodflows. Any aboveground construction subject to flood damage, <br />such as pump houses, should either be placed above, or flood proofed to, a level above the <br />one percent annual chance flood elevation. <br />Since the proposed project does not appear to be located within Corps owned or <br />operated lands, your plans should be submitted to the local floodplain administrator for <br />