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2 It is highly recommended that the applicant coordinate weed treatment plan development and implementation with Relly iJhing, Adams County Cooperative Extension (303-637-8100), to ensure compliance with the Colorado Noxious Weed Act. W~7,ter Storage Reservoir The Reclamation map states that reservoir final slopes wll be reclaimed to a slope of 3H:1 V. It is recommended that the final reservoir slopes be no steeper than 3: t, and preferably less steep such as 4:1 or 5: 1, to permit eventual use of the reclaimed water storage reservoir by wildlife. Steep slopes such as 3:1 can discourage wildlife Crom approaching and using the water reservoir. Reclamation Re-Vegetation The applicant proposes placement of 6" topsoil over reclaimed area's where requiieil. It is recommended that this be increased to 12" topsoil that is spread 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 yard per 1000 ft should be mixed with the soil. If compost is not applied, after topso>7 replacement and before grass seeding, the soil should be tested to determine the need for additional fertilizer. Recommended grass seeding dates aze from November 1" through Apri130'"; seeding should be done in unfrozen soil. A good quality grass seed drill with an agitator, depth bands and press wheels is recommended and planned by the applicant. The following native grass seed mix and application rate is recommended for re-vegetation in the soil types found in the mine area for upland and disturbed aeeas. It is based on MRCS "critical area" seeding rates that are double our normal rates. Upland and Disturbed Areas 100°i6 °~ In Mix Total LBS or Common Name PLSIAcre PLS needed er acre Western wheat rass Arriba, Barton 16.0 30 4.8 Switch rass Blackwell 10.0 20 2.0 Bi bluestem Kaw 11.0 15 1.7 Green needle rass Lodorm 10.0 15 1.5 Blue rams Hachita, Lovin ton 3.0 10 0.3 Sideoats rams au hn, Butte 9.0 10 1.0 Total 100% 11.3 Note: Ifseed is broadcast, recommended rate should be doubled.