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3-17 <br />I~ <br />3.4,9 Evaluation of Revegetation <br />Success of Revegetation will be determined by comparison of reclaimed areas <br />to reference areas using the same techniques used in the baseline vegetation <br />inventory (WRCD 1980b). The area will be subjectively evaluated annually for <br />success or revegetation beginning the second year after initial permanent <br />seeding. A statistically adequate sampling of cover and woody plant density <br />will take place in the fourth year or earlier at the operator's discretion. <br />Parameters compared will include vegetation canopy cover, herbaceous <br />production, species diversity and woody plant density. For demonstrations of <br />revegetation success, the parameters of vegetation cover and woody plant <br />density will be sampled to statistical adequacy and compared to the appropriate <br />reference areas (cover) and standards (woody plant density). Herbaceous <br />production success demonstration will be based on comparison of reclaimed <br />area production to pre-mine baseline data for the three affected vegetation <br />types. Diversity comparisons will be made based on relative cover values <br />obtained from the statistically adequate sampling. Statistical adequacy <br />demonstration and tests of revegetation success will be made using formulas <br />specified in Rule 4.15.11. Sampling techniques used for cover, production and <br />woody plan density will be comparable to baseline sampling techniques and will <br />be in conformance with Rule 4.15.11. Cover will be sampled using a point <br />intercept technique, production by clipping quadrats and oven drying the <br />clippings, and woody plant density by a quadrat method. Amore detailed plan <br />for bond release vegetation sampling will be submitted and approved prior to <br />initiation of sampling for Phase II or Phase III bond release. <br />The following standards will be used to evaluate revegetation. <br /> <br />Herbaceous Production <br />Density <br />Diversity <br />McClave <br />Greasewood Shrubland sample mean: 766 Ib/acre <br />Standard (90% of mean): 6901b/acre <br />Shadscale Shrubland sample mean: 661 Ib/acre <br />Standard (90% of mean): 595 Ib/acre <br />Juniper Woodland sample mean: 389 Ib/acre <br />Standard (90% of mean): 350 Ib/acre <br />Greasewood Shrubland <br />Shadscale Shrubland <br />Juniper Woodland <br />500 stems per acre <br />500 stems per acre <br />1,500 stems per acre <br />A minimum of three perennial species shall provide <br />a minimum of 3% relative cover. At least two of <br />these species must be cool season perennial <br />grasses. No individual species shall represent more <br />than 60% relative cover. <br />Volume 1 <br />03/06 <br />