2012-01-06_PERMIT FILE - C1982057 (12)

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opportunity to restructure the permit into a more workable document and clean up discrepancies that had developed over the years. Much of the baseline environmental information remained the same, especially in the areas of archaeology, land use, wildlife, and alluvial valley floors. Additions included updates in the soils and vegetation sections to include new areas within the permit area. The hydrology discussion (Tab 7) was extensively rewritten in 1990 to incorporate the five years of monitoring accomplished since permit issuance. Further, the discussions on potential hydrologic consequences, probable hydrologic balance, and cumulative impacts were revised to incorporate the revised mining plan. Other major changes included the mining and reclamation plans, hydrologic control plan, and concomitant changes to the postmine topography. In any case, the approved postmining land use remains the same as originally approved, i.e., range grazing and wildlife. Following is a summary of the revisions that have been approved over the life of the II -W operations. • Technical Revision (TR -08) was submitted on April 17, 1990 and provided Tie - Across Haul Road certifications and topsoil stockpile SAEs. Decision —to- Approve was issued on July 23, 1990. • Technical Revision (TR -09) was submitted on August 3, 1990 and presented road, culvert and stockpile changes. Decision—to-Approve was issued September 28, 1990. • Technical Revision (TR -10) was submitted on January 17, 1991 and consisted of modifications to sediment pond 006. Decision —to- Approve was issued on May 2, 1991. • Technical Revision (TR -11) was submitted on April 3, 1991 and changed the sequence of the mining plan. Decision —to- Approve was issued on July May 2, 1991. • Technical Revision (TR -12) was submitted on April 15, 1991 and presented a ditch stabilization plan for TAHRD -9. Decision —to- Approve was issued on May 2, 1991. PR -05 3 05/05