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2 <br />It is also recommended that Crested wheatgrass, proposed by the applicant, not be used for the <br />temporary seeding of the stockpiles but instead use Luna pubescent wheatgrass and/or Amur <br />intermediate wheatgrass, 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 />The topsoil and overburden stockpiles should be graded with fmal slopes no steeper than 4H:1 V. <br />Slopes that are less steep allow easier maintenance, are less susceptible to water erosion and <br />more readily establish grass protective cover. <br />The application states that topsoil removed from the site will be treated with along-term residual <br />pre-emergent orpost-emergent herbicide to reduce noxious weeds. The grasses recommended <br />for temporary re-vegetation of the topsoil stockpiles may be negatively affected by certain <br />herbicides. It is recommended that the applicant coordinate weed treatment plans with Kelly <br />iJhing with the Adams County Cooperative Extension and closely follow herbicide label <br />instructions to avoid problems. <br />Reclamation Re-Vegetation <br />Limited information was provided in the application relative to site reclamation plans. It is <br />recommended that topsoil (applicant proposes a total of one foot over all reclaimed azeas) be <br />spread over all areas to be re-vegetated in lifts not to exceed 4 inches and worked into the slopes <br />to ensure good adhesion and to minimize soil creep. In order to re-establish normal levels of <br />microbial activity in the soil, compost at the rate of one cubic Yazd per 1000 ft2 shouldbe mixed <br />with the soil. If compost is not applied, after topsoil replacement and before grass seeding, the <br />soil should be tested to determine the need for additional fertilizer. Recommended grass seeding <br />dates are from November 1 ~` through Apri130t°; seeding should be done in unfrozen soil. A <br />good quality grass seed drill with an agitator and press 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 area, and are based on NRCS "critical azea" seeding rates that are <br />double our normal rates. <br />Common Name 100% <br />PLS/Acre % in Mix Total LBS of <br />PLS needed <br />per acre <br />Western wheat rass Arriba, Barton 16.0 30 4.8 <br />Switchgrass Blackwell) 10.0 20 2.0 <br />Bi bluestem i<aw 11.0 15 1.7 <br />Green needle rass Lodorm 10.0 15 1.5 <br />Blue rams Hachita, Lovin tort) 3.0 10 0.3 <br />Sideoats rams au hn, Butte 9.0 10 1.0 <br />Total 100% 11.3 <br />Note: If seed is broadcast, rewmmended rate should be <br />doubled. <br />