Laserfiche WebLink
tMkod Steles DeMr6nsn! ar! RarleukYre ~ A (~ ~ '~J <br />Naduwl Resources Coroervatlon Service 36365&7004 - Office <br />BripMon Servke Corder ~ 303968.1768 -Fart <br />57 W. aroMey Lane vnvw.co.usda.poV <br />arlphton, Colorado 80801 3025 <br />March 24, 2004 <br />RECEIVED <br />state of Cotorado MAR 3 ©2004 / <br />Division ofMinera(s and Geology <br />1313 Sherman Street, Room 215 Divi:iaa ai Ydicercis & Gealopy <br />Denver, CO 80203 " <br />Subject: Reclamation Permit Amendment Application <br />Denver Water Department, Reclamation Pit #1, Permit No. M-1977-153 / <br />The West Adams Conservation District has requested assistance from our agency in reviewing <br />the subject Reclamation Permit Amendmem application that changes end use to a municipal <br />surface water storage reservoir. Our comments and recommendations center on two areas: <br />reclamation of riparian areas disturbed by past mining-related activities and the long-term area <br />i~pacts,oq surface t4n¢ subsgrface water resources: •We have the following commerts and <br />recommendations,op,this,applii:ation: I .. ~ ..'"'b: - •, . ;:,:c,: •:r;• <br />',i1.,•, :.'i~ ii, iii r;, t,~, .I I:! -,its',: <br />Reclametlon~Plan .,,•:,: r•, q :, .. .. .. , <br />.., <br />Water StorageReservoir• • ' ~'" ~ ".,:,'. ,,• , <br />The Natural Resources Conservation Service (MRCS) recommends that the final reservov slopes <br />be no steeper than 3:1, and preferably less steep, to permit eventual use of the reclaimed <br />reservoir by wildlife. Steep side slopes can discourage wildlife from approaching and using the <br />water reservoir. <br />Reclamation Re-Vegetation <br />Riparian and other areas surrounding the mine site that have been disturbed by past arining- <br />related activities will require reclamation to prevent wind and water soil erosion. During site <br />reclamation of these areas, it is recommended that topsoil be spread over all areas to be re- <br />,yegetated in lifts not to exceed 4 inches and worked into the slopes to ensure good adhesion and <br />to minimize soil creep. In order to re-establish normal levels of microbial activity in the soil, <br />compost,at~the rate of one cubic yard per 1000 ft should be mixed with the soil. If wmpost is <br />not applied, following topsoil replacement and before grass is seeded, the soil should be tested to <br />determine the need for,additional fertilizer. Normal recommended seeding dates are from <br />November, I° tflroug)ti Apri130msetedingshould bedone in unfrozen soil. A good quality seed <br />drill with an agitator and press wheels is recorniribndefl: ~ '• ~ "•. •: • • ., . , „ <br />The Natural goseurces Conservation Servim Drovides IeadershiD In a partnership Mort to help people <br />