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2 <br />It is highly recommended that the applicant coordinate weed treatment plan development and <br />implementation with Kelly Uhing, Adams County Cooperative Extension (303-637-8100), to <br />ensure compliance with the Colorado Noxious Weed Act. <br />Water Storage Reservoir <br />The Reclamation map states that reservoir final slopes will be reclaimed to a slope of 3H:1 V. It <br />is recommended that the final reservoir slopes be no steeper than 3: i, and preferably less steep <br />such as 4:1 or 5:1, to pernvt eventual use of the reclaimed water storage reservoir by wildlife. <br />Steep slopes such as 3:1 can discourage wildlife from approaching and using the water reservoir. <br />Reclamation Re-Vegetation <br />The applicant proposes placement of 6" topsoil over reclaimed areas where required. It is <br />recommended that this be increased to 12" topsoil that is spread in lifts not to exceed 4 inches <br />and worked into the slopes to ensure good adhesion and to minimize soil creep. In order to re- <br />establishnormal levels of microbial activity in the soil, compost at the rate of one cubic yard per <br />1000 ft2 should be mixed with the soil. If compost is not applied, after topsoil replacement and <br />before grass seeding, the soil should be tested to determine the need for additional fertilizer. <br />Recommended grass seeding dates are from November 1 ~` through Apri130`s; seeding should be <br />done in unfrozen soil. A good quality grass seed drill with an agitator, depth bands and press <br />wheels is recommended and planned by the applicant. <br />The following native grass seed mix and application rate is recommended for re-vegetation in the <br />soil types found in the mine area for upland and disturbed areas. It is based on NRCS "critical <br />area" seeding rates that are double our normal rates. <br />upland and Disturbed Areas <br /> 100% % in Mix Total LBS of <br />Common Name PLS/Acre PLS needed <br />per acre <br />Western wheat rass Arriba, Barton 16.0 30 4.8 <br />Switch rass Blackwell 10.0 20 2.0 <br />Bi bluestem Kaw 11.0 15 1.7 <br />Green needlegrass Lodorm) 10.0 15 1.5 <br />Blue grams Hachita, Lovin ton 3.0 10 0.3 <br />Sideoats rams Vau hn, Butte 9.0 10 1.0 <br />Total 100°k 11.3 <br />Note: If seed is broadcast, recommended rate should be <br />doubled. <br />