2010-10-12_PERMIT FILE - C1982057A (5)

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projected final grading limits far the postmining areas. All truck traffic will be routed to enter the pits at an upper elevation and leave the pits at a lower elevation. Most of the haulage roads will be built prior to the time mining commences and they will be reclaimed as the roads are mined out or are no longer needed. Some of the haulage roads will be extended through the spoil and road construction will progress with the mining activity. Final reclamation of these roads will occur at the end of the life of the mine. Haul roads beyond the limit of mining will be located on ridges or on the most stable available slopes to minimize erosion. No haul road will be located in the channel of an ephemeral stream which has a watershed of at least one square mile, on intermittent or perennial stream unless specifically approved by the Division. All stream crossings will be made using culverts. Haul roads will be located and designed to minimize downstream sedimentation and flooding. Stream Buffer Zones. The stream buffer zone along a portion of Sage Creek (land within 100 feet of a perennial stream or stream with a biological community as defined by Section 4.05.18(3) of the CDMG regulations) will be affected by disturbance activities within the TAHR permit area. The design plans for the haul road were developed so that there will be no disturbance to the main channel of Sage Creek. Disturbances within 100 feet of Sage Creek were limited and consisted of activities directly related to the construction of the haul road embankment. The portion of the TAHR that encroaches within 100 feet of Sage Creek is located near the intersection with County Road 518, west of the three existing culverts through which Sage Creek flows. The toe of the haul road embankment and associated topsail removal area will be approximately 50 feet west of the closest culvert. The original road location was approximately 350 feet to the west of the culverts. Due to concerns raised by the County government regarding sight distance, school bus traffic, powerlines, and multiple intersections, the road was moved closer to the Sage Creek culverts. The haul road ditches are designed to handle the runoff from a 10-year, 24-hour storm event and should preclude the potential of any water quality degradation in Sage Creek as a result of these associated disturbances within the buffer zone. Because the anticipated operations will not result in disturbance of the main channel, there should be no impact to the quantity of streamflow in Sage Creek from the buffer zone disturbance. After mining and related activities, the following reclamation plan for the area will be implemented to help insure the reestablishment of meadow type vegetation that would be similar to grassland meadow vegetation in the area and which will also stabilize the reclaimed landscape and provide utility to livestock and wildlife. The areas within the buffer zone that may potentially be affected are dominated by weedy species resulting. . from the Sage Creek flood in 1985, though some seeded pasture species also occur (see Tab 10). Adjacent PR-05 16 Revised 01/06