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You may want to contact Ron Broda, Vegetation Weed Management Specialist with the Weld <br />Courty Public Works Department at (970) 356-4000 X 3770 to coordinate weed treatment plan <br />development and implementation, and to ensure compliance with the Weld County code and the <br />Colorado Noxious Weed Ad. <br />Water Storage Reservov <br />It is recommended that the fmal reservoir slopes be no steeper than 3:1, and preferably less steep <br />such as 4:1 or 5:1, to pemtit eventual use of the reclaimed water storage reservoir by wildlife. <br />Steep slopes can discourage wildlife from approaching and using the water reservoir. <br />Reclamation Re-Vegetation <br />Far 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 two cubic yard per 1000 ft2 should be mixed with the soil. If compost is not applied, following <br />topsoil replacement and before grass is seeded, the soil should be tested to determine the need for <br />additional fertilizer. Recommended grass seeding dates are from November 1 ffi through April <br />30t°; seeding should be done in unfrozen soil. A good quality grass seed drill with an agitator, <br />depth bands 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. It is based on NRCS "critical area" seeding rates that are <br />double our normal rates. <br /> Total Lbs of <br />Common Name 100% <br />P!S/Acre % in Mix PlS needed <br />er acre <br />Western wheat rass Arriba, Barton 16.0 20 3.2 <br />Switch rass Blackwell 5.0 20 1.0 <br />Sand bluestem Elida 16.0 20 3.2 <br />Green needl rass Lodorm 10.0 10 1.0 <br />Blue Tama Hachital, Lovin ton 3.0 15 0.5 <br />Sideoats rams au hn, Butte 9.0 15 1.4 <br />Total 100% 10,8 <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 Internet or it can be obtained through local wanly extension <br />