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PART 3. Testing Adequacy of Reclamation <br />I -. <br />:.ivestock grazing and wildlife habitat are [he most common proposed land <br />uses after reclamation. Using these as examples, reclamation must satisfy <br />three elements: (1) adequate cover (for soil protection), (2) suitable spe- <br />cies composition (for forage or shelter), (3) adequate productivity (for <br />forage). <br />Terminology <br />Premining <br />(• <br />Affected Area <br />x~ = percent cover or productivity (gm/m~) <br />s_7 variance <br />x~ <br />Postmining <br />Reclaimed Area <br />Control Area <br />y, = percent cover or productivity (bm/mZ) <br />s_' = variance <br />Y! <br />Control Area <br />:~•. = percent cover or productivity (gm/mZ) <br />s_~ = variance <br />xz <br />y~ = percent cover or :roductivi[y (gm/m2) <br />s_Z = variance <br />Y~ <br />i~.^.ii: See equations in Part 2 for calculating x~, y~, y~, and corres- <br />ponding variances. <br />= value which must be a[ least equalled to demonstrate that land -.as burn <br />X <br />reclaimed. <br />X7 - <br />:~ 2 <br />X = <br />Explanatory Note: If the value for the premining control (v~) equals the <br />value for the postmining control (ya), then z equals the value for <br />the premining affected area (z~). In [his case, the value for the <br />reclaimed area (x z) is compared directly with the value for the pre- <br />mining affected area (z~). If .the value for the preminins affected <br />area is 80 percent of the value for the premining control area, then <br />[he value for the reclaimed area should be at least 30 percept of the <br />value for the postmining control area if [he reclamation coal is co <br />be met. This simple proportion is used to try to account for differ- <br />ences between years. <br />Cover and Productivity Test <br />Assuming acceptable species composition after revegetation, bond will <br />be released when the following inequality has been satisfied after twu con- <br />secutive growing seasons for both vegetative cover and productivity. Com- <br />position of cover (vegetation-litter-rock) will be evaluated separ:i;,•ly. <br />-8- <br />~iEYISED 7/81 3 <br />