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RULE 4 PERFORMANCE STANDARDS <br /> ....'.M'.--"..E.. Y« .q.u;K.Bw. .,.t+ -Pt,.,w.Y.=.. .....4• +.. :„+a...,^s -r,tW'5Nax.Y?r$G.s:H,n.*rM,a-flS .s..r.+�w4 a...t wS#'SM.5r} S'MZ' .'.+. yOr S,Ss;'YTbM'r".n <br /> Texture clay loam sandy clay loam sandy clay loam clay loam clay loam <br /> aPlot 1 = 18 inches of topsoil, strip seeding in alternate rows. <br /> bPlot 2 = 6 inches of topsoil and surface manipulation, seeded with native shrubs and low <br /> competitive forbs. <br /> Plot 3 =6 inches of topsoil, strip seeding in alternate rows. <br /> dPlot 4 =Non-topsoiled spoil, strip seeding in alternate rows. <br /> 'Plot 5 = Non-topsoiled spoil, seeded with unpalatable native shrubs and low competitive forbs <br /> and grasses. <br /> To evaluate the impact from wildlife browsing, elk proof fencing was constructed on one-half of <br /> each treatment. <br /> Colowyo Mine Specific Field Trial <br /> Historically, at the Colowyo Mine in Phase III released areas, field trial treatments to be evaluated <br /> include five plot treatments. <br /> 1. 18 inches of live-haul topsoil over spoil with strip seeding. The strip seeding would include <br /> a strip of native shrubs and native low-competitive forbs that would alternate with a strip <br /> of native grasses, forbs, and shrubs. The proposed seed mb tures for this treatment are <br /> presented in data provided in the 2005 Annual Report. <br /> 2. 6 inches of live haul topsoil over spoil and seeding with native shrubs and low-competitive <br /> native forbs. Include some surface manipulation to create depressions for enhanced soil <br /> moisture conditions. The proposed seed mixture for this treatment is presented in Table 1. <br /> 3. 6 inches of live-haul topsoil over spoil with strip seeding. <br /> 4. Non-topsoiled spoil with strip seeding. <br /> 5. Non-topsoiled spoil seeded with relatively unpalatable native shrubs, low-competitive <br /> native forbs, and low-competitive native grasses. <br /> It must be noted that at the time of planting, conditions were nearly perfect for the emergence of <br /> sagebrush (from seed) regardless of field trials being attempted. This circumstance was verified <br /> by excellent sagebrush recruitment from all surfaces reclaimed during that year. Therefore, <br /> observed results must be interpreted accordingly. <br /> Colowyo Mine Specific Plot Construction and Monitoring <br /> All plots were constructed in the fall of 2000. Annual monitoring occurred in July of 2001, 2002, <br /> 2003 and 2004. Plots were sampled for vegetative cover by species, bare ground, rock and litter. <br /> A point-intercept method was used to estimate cover. Within each plot at Colowyo, five 100-m <br /> transects were randomly located. Cover data was collected every one meter along each transect <br /> (500 cover points per plot). [To avoid loss of data, Cedar Creek commenced monitoring of these <br /> plots beginning in 2005 utilizing more stringent scientific methods.] <br /> Rule 4 Performance Standards 4-53 Revision Date: 1/22/20 <br /> Revision No.: TR-136 <br />