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<br />generated by the West Ridge Disposal Area development. <br /> <br />Reclamation of the Orchard Valley West Mine fill slopes and associated disturbances was completed <br />by the fall of 1987. Slope instability necessitated the relocation of topsoil at the mine site and <br />subsequent reseeding and mtilching of both the new pile and the old pile footprint. This was <br />completed in the fall of 1990. <br />Several small topsoil piles exist throughout the various disturbance azeas of the mine site. Those piles <br />projected to remain undisturbed for longer than five years are seeded with the permanent seed <br />mixture. Those piles projected to be redistributed within five years are seeded with the temporary <br />seed mixture. <br />Seed Mixtures <br />Several seed mixtures have been utilized at the Bowie No. 1 Mine. The following tables summarize <br />the various seed mixtures used historically and currently to stabilize disturbed areas. <br />Table 1 -Seed Mixture 1 - 1977 Revegetation Program <br />Species Origin Seeding Rate (PLS # Acre) <br />Western Wheatgrass Native 8.0 <br />Crested Wheatgrass Introduced 4.0 <br />Pubescent Wheatgrass Introduced 10.0 <br />Intermediate Wheatgrass Introduced 8.0 <br />Yellow Sweetclover Introduced 8.0 <br />Dryland Alfalfa Introduced 6.0 <br />Total 44.0 <br />Table 2 -Seed Mixture 2 - 1978 & 1979 Revegetation Program <br />Species Origin Seeding Rate (PLS # Acre) <br />Streambank Wheatgrass Native 10.0 <br />Western Wheatgrass Native 14.0 <br />Pubescent Wheatgrass Introduced 5.0 <br />Intermediate Wheatgrass Introduced 5.0 <br />Indian lticegrass Native 4.0 <br />Yellow Sweetclover Introduced 2.0 <br />-2- <br />