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measured in the corresponding reference site. (b) Vegetation must be of a grazing tolerant type to present maximum resistance to damage by domestic sheep grazing during winter. In addition, site characteristics, particularly soil characteristics, must have properties favorable to the persistence of the revegetated sites underthe probablegrazingvegime. (c) Herbaceous productivity in revegetated sites will be at least 90% of the herbaceous productivity for perennial species measured in the appropriate reference site or 90% of the expected productivity as determined by USDA range site descriptions. The range condition based on species composition by the NRCS method will be evaluated for each of the reference areas at the time of bond release. If the range condition is found to be poor the productivity standard will be based on the USDA Range site descriptions. If the reference area is found to be in fair or better condition, then the data from the reference area will be used. (d) For large permanent sites, a species diversity success standard of at least 2 perennial cool season grasses, each with a relative vegetative cover equal to or greater than 3% will be used. In addition, perennial (orbs shall comprise a relative vegetative cover equal to or greater than 3%. On the larger permanent revegetated sites, any 3non-native species combined should not exceed 80% relative vegetative cover, and no one non-native species should exceed 60% relative vegetative cover. On smaller and linear featured sites the forb and maximum relative vegetative cover diversity criteria will not apply since existing native species will have sufficient opportunity to colonize the sites in the future. However, the minimum relative vegetative cover diversity criteria for grasses will remain the same. (see Table V-15) (e) Woody plant density on the larger and concentrated revegetated sites will be 500 stems per acre since the post reclamation use of the land will mainly be for grazing purposes. Woody plant density criteria will be considered adequate if the total cover of woody species is 2% or greater (note: 500 1.75 ft2 shrubs per acre = 2% total shrub cover). Woody plant density criteria for linear featured and small localized sites associated with the long term operation of the mine will be 200 stems per acre. Woody plant density criteria will be considered adequate if the total cover of woody species is 1% or greater. No woody plant density criteria shall be required for drill roads or drill pads associated with exploration development or degas borehole drilling. Shrub species from adjacent undisturbed lands will have an adequate opportunityto colonizethese sites making density criteria unnecessary. ExhibitE-Reclamation Plan Rio Blanco Special UsePermit#61-f September2000 V34