2004-03-30_REVISION - M1979195 - Laserfiche WebLink

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-~ ~r United States Department of Agr-Icukure ~-1~RCS Natural Resouroes Conservation Service Brighton Service Center 57 W. Bromley Lane Brighton, Colorado 80801-3025 /~-M-o l A J W (N-t-~ 303.659-7004 -Office 303-659-1768 -Fax www.co.usda.gov March 25, 2004 R~~~s ~, ,~ ' 11 State of Colorado MAR 3 0 2004 Division of Minerals and Geology Oivisian of Minerals & Cealogy 1313 Sherman Street, Room 215 Denver, CO 80203 Subject: Reclamation Permit Amendment Application Suburban Sand & Gravel, Road Runner Rest, Permit No. M-1979-195 The West Adams Conservation District has requested assistance from our agency in reviewing the subject Reclamation Permit Amendment application that changes end use from recreation to water storage. Our comments and recommendations center on two azeas: reclamation of riparian areas disturbed by past mining-related activities and the long-term area impacts on surface and subsurface water resources. We have the following comments and recommendations on this application. '~ ~ _ ,1u~. ,.. ..... ,..~,,,. Reclamation'Plau .i. 'i' , • i` ,,: ~ .,' 'j ~ .._.r,: .. ~~ 4. : . Water Storage Reservoir., : ' " ~ r'rr. - . • ~~- ~ ' ...~„ The Natural Resources Conservation Service (MRCS) recommends that the final reservoir slopes be no steeper than 3:1, and preferably less steep, to permit eventual use of the water storage reservoir by wildlife. Steep side slopes can discourage wildlife from approaching and using the reservoir. Reclamation Re-Vegetation Riparian and other areas surrounding the mine site that have been disturbed by past mining- related activities will require reclamation to prevent wind and water soil erosion. During site reclamation of these areas, it is recommended that topsoil be spread over all areas to be re- vegetated in lifts not to exceed 4 inches and worked into the slopes to ensure good adhesion and to minimize soil creep. In order to re-establish normal levels of microbial activity in the soil, compost at the rate of one cubic yazd per 1000 ft2 should be mixed with the soil. If compost is not applied, following topsoil replacement and before grass is seeded, the soil should be tested to deteiritine the need for additional fertilizer. Normal recommended seeding dates are from November 1st through Apri130'h; seeding should be done in unfrozen soil. A good quality seed `drill witfi an agitator and press wheels is recommended. The Natural Resources Conservation Service provides leadership in a partnership effort to help people