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5 II. CRITERIA AND SCHEDULE FOR BOND RELEASE PHASE I Rule 3.03.1(2)(a) states, "Up to sixty percent of the applicable bond amount shall be released when the permittee successfully completes backfilling, regrading, and drainage control in accordance with the approved reclamation plan." The Red Canyon Mine surface dismrbance area is situated at the upper end of a southerly oriented draw with an ephemeral drainage which flows only in response to heavy storm runoff or due to irrigation runoff from agricultural lands nonh of the property. The mine portals, a ventilation shaft, coal stockpile and associated facilities were located at the upper end of the disturbed area, with the sediment pond located further down the draw. There was extensive pre-law disturbance throughout the 26.4 acre disturbed area. During mine operations (1978-1985), underground development waste was disposed of in abandoned strip pits on the slope to the east of the draw. An office trailer and other ancillary facilities had been located on a bench to the west of the draw. Reclamation, including portal sealing, facilities removal, backfilling and grading, construction of a riprapped permanent drainage channel through the reclaimed valley bottom, and revegetation, was completed in 1988. Phase I bond release was approved b;~ the Division on October 13, 1989, with concurrence of OS`~2. PHASE II and III Following approval of Phase 1 bond release, the sediment pond was approved for retention as a permanent impoundment, and a transmission line and segment of the haul road (to allow future access to the transmissio n line) were also approved for retention, at the request of the operator/landowner and the Delta Montrose Electric Association. Some final drainage reclamation work, including re- routing of the lower segment of the major drainage channel into the impoundment, was completed in 1997. The surface of the remaining road segment was also ripped and seeded in 1997, in compliance with permit requirements. The road segment was retained for the postmine land use due to the need for future access. The road surface was ripped and seeded with grasses, primarily to minimize the potential for noxious weed invasion. The revegetated road surface will still allow for the infrequent vehicular access envisioned for the postmine land use. The entire permit area encompassed 610 acres, extending to the north and west of the surface dismrbance area. Approved affected area was 250 acres, including both "E" seam and underlying "D" seam workings. "D" seam workings were never developed, and the total area actually affected by surface dismrbance and underground workings was approximately 150 acres. Coal extraction ratio was limited to between 50% and 55%, to prevent subsidence related material damage to alluvial aquifers, stream channels, irrigation structures, and residences.