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MINE ID # OR PROSPECTING ID #: nn_tgaa_tnu <br />INSPECTION DATE: nAnrrn 9t,..?nn~ INSPECTOR=S INITIALS: nR~ <br />OBSERVATIONS <br />This was a routine inspection conducted by David Bird and Tony Woldron of DRMS, accompanied by Randy <br />Moulton, Plant Manager of TXI. The site lies alongside State Highway 93 about 5 miles south of Boulder. The pit <br />and several material stockpiles are west of the highway, while the plant and offices are east of the highway. A <br />haul road and conveyor pass beneath the highway. The mining operation extracts Pierre Shale from a pit on <br />the west side of Hwy 93. The shale is mined with an excavator and transported by truck for crushing and <br />processing before conveyance to the plant. <br />Mining and reclamation are ongoing at the lone permitted pit at the site, with the plan being to continue to <br />expand the pit southward. On visual examination, the aerial extent of the pit appeared to be close to the 15 <br />acre size reported in TXI's 2006 annuol report to DRMS. The annual report also stated that the quarry has <br />reached the permitted depth, which was visually estimated to be between 200 and 300 ft. Concurrent <br />reclamation, consisting of mulching/reseeding, is being implemented on previously mined slopes toward the <br />northern end of the pit. The highwall appeared stable at a slope of about 1:1, and no evidence of problematic <br />erosion was observed. Na jointing or faulting was observed that could adversely affect the highwall stability. A <br />minor amount of water was standing in the pit floor, and was explained to have originated from recent <br />precipitation. Mr. Moulton said that no ground-water inflow to the pit occurs, and from our vantage pit on the <br />rim, no highwall seeps were seen. Several small material stockpiles pre scattered around the pit's southern rim, <br />which are transitory in nature and are processed as plant capacity allows. Haul roads are well maintained to <br />prevent dust generation. The boundary of the operation appeared to be adequately marked. The weed <br />problem noted in a previous inspection report seems to be under control. <br />The plant is not within the boundaries of the permitted area due for inspection, so no inspection was performed <br />at the plant. <br />I & E Contact Address <br />NAME: Randv Moulton -Plant Manager <br />OPERATOR: TXI Boulder. <br />STREET: 1 1798 Hwy 93 <br />CITY/STATE/ZIP: Rnulriar Cn Rn3n3 <br />cc: r CE <br />r BL <br />r Fs <br />r HW <br />r HMWMD (CH) <br />r SE <br />r WOCD (CH) <br />r OTHER <br />