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2010-05-27_INSPECTION - C1992080
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2010-05-27_INSPECTION - C1992080
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Last modified
8/24/2016 4:12:30 PM
Creation date
6/2/2010 9:45:05 AM
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Template:
DRMS Permit Index
Permit No
C1992080
IBM Index Class Name
INSPECTION
Doc Date
5/27/2010
Doc Name
Inspection Report
Inspection Date
5/18/2010
Email Name
TAK
Media Type
D
Archive
No
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Signs and Markers <br />Permit boundary markers were properly displayed at numerous locations inspected, with the exception of <br />the two recently regraded ditches that were mentioned as items 2 and 3 on page 6 of the October 29, 2008 <br />inspection report. Regrading of those ditches has created two low areas that will collect runoff (see <br />discussion of Hydrologic Balance, below). To ensure compliance with 4.02.3, additional permit boundary <br />markers are needed at both low areas. <br />Topsoil markers were properly displayed on the only two remaining stockpiles: 4 and 7. The mine i.d. <br />sign was properly displayed on the only public road entrance into the permit area. <br />Roads <br />The asphalt-surfaced main haul road was in good condition. The main haul road and the North Pit haul <br />road have previously been approved for permanent retention, as documented in Appendix 5-1 of the permit <br />application. The width of the North Pit haul road has been reduced to 30 feet as specified on page 5-26 of <br />the approved reclamation plan. The road surface of the North Pit haul road was in good condition during <br />the inspection. <br />Hydrologic Balance <br />Pond I (large pond, outfall 001), Pond 2 (small pond, outfall 002 ),and drainage routing. The two <br />sediment control ponds were approved for removal in Technical Revision 15 (approved in January 2008) <br />and MR-6 (vegetation cover data, approved August 11, 2008). Pond 1 (the large pond) was regraded in <br />early 2009 and backfilled with all of the material from stockpile #8. Regrading resulted in a flat surface <br />that blends well with the adjoining flat, tilled farmland just outside the permit area to the south. Ditches <br />that fed Pond 1 have also been regraded. Runoff from this large flat area would make its way to natural <br />drainages on either side of Ewing Mesa, in the same way that runoff from the farmland would naturally <br />drain. The pond's flume remains in place. <br />Pond 2 also was regraded in early 2009, with the earthen embankment removed, leaving a flat-bottomed <br />drainage that reports a short-distance to the lower part of Carbon Junction Canyon. Runoff from the west <br />half of the PRSA will continue to flow through this drainage to Carbon Junction Channel, via a culvert <br />underneath the permanent asphalt-surfaced haul road. All drainage from the reclaimed North Pit will make <br />its way to Carbon Junction Canyon via the mine's reconstructed portion of the channel and the double- <br />culverts underneath the permanent asphalt-surfaced haul road. The pond's flume has been removed. <br />The following two ditches mentioned on page 6 of the October 29, 2008 inspection report have been <br />backfilled and regraded to a flat surface: the diversion ditch that extended approximately 500 feet along <br />the eastern and southern edge of the Equipment Storage Area (item 2 in the inspection report), and the <br />collection ditch that extended approximately 500 feet along the east side of the paved haul road (item 3 in <br />the inspection report. Removal of these two ditches have left low areas on the ground surface where the <br />ditches extended upstream into the gravel pit area. These two low areas would collect runoff. The low <br />area on the west side of the haul road is at the inlet of three culverts. To ensure compliance with 4.02.3, <br />additional permit boundary markers are needed at both low areas. <br />Carbon Junction channel The reconstructed section of the channel was in good shape with large rock <br />riprap in place and the two 5 %2 -foot diameter culverts extending underneath the haul road. Vegetation <br />4
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