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2 <br />wheatgrass aze recommended, both of which will establish readily and quickly. This temporary <br />seeding should be done at a rate of 15 total pounds PLS per acre. <br />It is highly recommended that the applicant coordinate weed treatment plan development and <br />implementation with Kelly iJhing, Adams County Cooperative Extension (303-637-8100), to <br />ensure compliance with the Colorado Noxious Weed Act. <br />Reclamation Re-Vegetation <br />For those areas to be reclaimed, it is recommended that 12 inches of topsoil be spread in lifts not <br />to exceed 4 inches and worked into the slopes to ensure good adhesion and to minimize soil <br />creep. In order to re-establish normal levels of microbial activity in the soil, compost at the rate <br />of one to two cubic yard per 1000 ftZ should be mixed with the soil. If compost is not applied, <br />prior to seeding the topsoil should be tested to deteRnine the need for additional fertilizer. <br />Recommended grass seeding dates are from November 30`° through April 30`h; seeding should <br />be done in unfrozen soil. A good quality grass seed drill with an agitator, depth bands and press <br />wheels is recommended. <br />The following native grass seed mix and application rate is recommended for re-vegetation in the <br />soil types found in the mine areas. It is based on NRCS "critical azea" seeding rates that aze <br />double our normal rates. Please note that the Landscape Plan map (sheet 4 of 4) in the <br />application under planned native grass mix lists lbs (PLS)/aq this column is actually 100% <br />PLS/ac. The 100% PLS/ac figure should be muhiplied by the corresponding percent mix for the <br />grass to provide Ibs (PLS)/ac for that grass. <br /> Total LBS of <br /> <br />Common Name 100% <br />PLS/Acre <br />% in Mix PLS needed <br />per acre <br />Western wheat rass Arriba, Barton 16.0 30 4.8 <br />Switch rass Grenville 4.0 20 0.8 <br />Sand bluestem Elida 16.0 15 2.4 <br />Alkali Sacaton (Salado) 1.5 15 0.3 <br />Blue rams (Hachita, Lovin ton 3.0 10 0.3 <br />Sideoats rams Vau hn, Butte 9.0 10 1.0 <br />Total 100% 9.6 <br />Note: If seed is broadcast, recommended rate should be <br />doubled. <br />We recommend mulching re-vegetated areas with clean weed-free straw or native hay. It should <br />be applied at a rate of 4,000 pounds per acre and crimped into the soil to anchor it. Crimping <br />should be cross slope or on the contour, if possible. The State of Colorado has a list of certified <br />weed-free straw available on the intemet or it can be obtained through local county extension <br />