_INSPECTION - C1992080 (29) - Laserfiche WebLink

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Signs and Markers Permit boundary markers were properly displayed at numerous locations inspected,with the exception of the two recently regraded ditches that were mentioned as items 2 and 3 on page 6 of the October 29,2008 inspection report. Regrading of those ditches has created two low areas that will collect runoff(see discussion of Hydrologic Balance,below). To ensure compliance with 4.02.3,additional permit boundary markers are needed at both low areas. Topsoil markers were properly displayed on the only two remaining stockpiles: 4 and 7. The mine i.d. sign was properly displayed on the only public road entrance into the permit area. Roads The asphalt-surfaced main haul road was in good condition. The main haul road and the North Pit haul road have previously been approved for permanent retention,as documented in Appendix 5-1 of the permit application. The width of the North Pit haul road has been reduced to 30 feet as specified on page 5-26 of the approved reclamation plan. The road surface of the North Pit haul road was in good condition during the inspection. Hydrologic Balance Pond 1 (large pond, outfall 001), Pond 2 (small pond, outfall 002), and drainage routing. The two sediment control ponds were approved for removal in Technical Revision 15 (approved in January 2008) and MR-6 (vegetation cover data, approved August 11, 2008). Pond 1 (the large pond) was regraded in early 2009 and backfilled with all of the material from stockpile#8. Regrading resulted in a flat surface that blends well with the adjoining flat, tilled farmland just outside the permit area to the south. Ditches that fed Pond 1 have also been regraded. Runoff from this large flat area would make its way to natural drainages on either side of Ewing Mesa, in the same way that runoff from the farmland would naturally drain. The pond's flume remains in place. Pond 2 also was regraded in early 2009,with the earthen embankment removed, leaving a flat-bottomed drainage that reports a short-distance to the lower part of Carbon Junction Canyon. Runoff from the west half of the PRSA will continue to flow through this drainage to Carbon Junction Channel, via a culvert underneath the permanent asphalt-surfaced haul road. All drainage from the reclaimed North Pit will make its way to Carbon Junction Canyon via the mine's reconstructed portion of the channel and the double- culverts underneath the permanent asphalt-surfaced haul road. The pond's flume has been removed. The following two ditches mentioned on page 6 of the October 29, 2008 inspection report have been backfilled and regraded to a flat surface: the diversion ditch that extended approximately 500 feet along the eastern and southern edge of the Equipment Storage Area (item 2 in the inspection report), and the collection ditch that extended approximately 500 feet along the east side of the paved haul road(item 3 in the inspection report. Removal of these two ditches have left low areas on the ground surface where the ditches extended upstream into the gravel pit area. These two low areas would collect runoff. The low area on the west side of the haul road is at the inlet of three culverts. To ensure compliance with 4.02.3, additional permit boundary markers are needed at both low areas. Carbon Junction channel The reconstructed section of the channel was in good shape with large rock riprap in place and the two 5 '/2 -foot diameter culverts extending underneath the haul road. Vegetation 4