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<br />-`- <br />1. Of Che three principal cool season grass species, no single species <br />should comprise greater than 40% of the relative importance of this <br />component (cool season masses). OP the two shrub species, neither should <br />comprise greater than 80% of the relative importance of this component . <br />(shrubs). That is; if cool season grasses comprise SO% of the total ~ <br />diversity on the reclaimed surface, then none of the three principal cool <br />season grasses should account for ronre than 40% of the total diversity ' <br />for cool season grasses (or 12% of total diversity). <br />2. Diversity calculations will be based on relative cover values by <br />species, obtained during the sampling program during the liability <br />period. Sufficient numbers oC samples shall be taken to insure that the <br />requirements of. sample adequacy are met. <br />Shrub Density <br />ldyoming Fuel has analyzed the structure and numbers of woody plants in the <br />pre-mining communities aC the Canadian Strip. It was concluded that there <br />is a High mortality amoung young woody plants and that it is only the <br />mature plants which are contributory to a well developed community. For <br />these reasons Wyoming Fuels has proposed a standard of 3,770 stems/acre + 1,700. <br />The Division feels that the 3,770 stems/acre is a reasonable standard based <br />upon the background information submitted, with the following clarifications. <br />1. The base standard for woody plant density reestablishment shall be <br />~ 3,700 live woody plant stems/acre. Wyoming Fuel will reestablish woody <br />plant densities to at lease 90% of this standard with 80% confidence. <br />2. Woody plant density data will be collected during the sampling program <br />during the liability period. <br />If you have any questions please feel Eree to call. <br />Sincerely, <br /> <br />Michael S. Savage <br />Reclamation Specialist <br />MS:ep <br />cc: E. Bischoff <br />R. llomingue <br />