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(Page 2) <br />MINE ID # OR PROSPECTING ID #: rot-iaaa-naI <br />INSPECTION DATE: ~3/~4/na INSPECTIOR=S INITIALS: raS <br />1. This inspection was a continuation of the Division's previous site inspection on December 11, 2003 to observe <br />installation of drainage control structures along the haul road to the new east mine site. Present during the inspection <br />was Mr. Steve Onorofskie of American Gypsum Company. <br />2. Construction of Sediment Ponds 1 & 2 has been completed. This inspector noted that the quality of construction was <br />high and that the ponds had been constructed in accordance with the approved designs. Mr. Onorofskie noted that the <br />drainages near the east mine site are ephemeral and flow only on rare occasions in response to significant rainfall events. <br />3. Installation of culverts No. 2 (30" DIA CMP) and No. 3 (48" DIA CMP) was in progress at the time of inspection. The <br />culverts were 335 linear feet and 325 linear feet, respectively. The culverts were approximately'/z buried with <br />compacted mineral soil. The operator had done a good job of utilizing locally available clay soils in the compacting <br />process as well as wetting the soils, as needed, prior to compaction. Mr. Onorofski mentioned that their goal is to achieve <br />a compaction of 95% of the standard proctor density for the available soils. A two wheeled vibrating roller/packer was <br />used to compact the soil around the pipe(s) in lifts. The compacted sail appreared to be very firm and the pipe well <br />bedded. The roller/packer operator used at least 2 passes for each new load of backfill material. Mr. Onorofski <br />mentioned that once the culverts are completely backfilled and compacted with locally available soils, overburden <br />materials from the active quarry will be used to complete the backfill project to finish grade. <br />4. Overall, the installation of the drainage control structures was impressive. There were no problems or concerns noted. <br />The planned haul road construction will include a total of 6 culverts and 5 sediment ponds. The Division appreciates the <br />operator keeping the Division informed of the current construction activities and the progress made thus far with the <br />drainage control installation and haul road construction. <br />I & E Contact Address <br />NAME: <br />OPERATOR: <br />STREET: <br />CITY/SPATE/ZIP: <br />cc: Carl Mount, DMG (via E-Mail) <br />Bureau of Land Management <br />Glenwood Springs Resource Area Office <br />50629 Hwy 6824, PO Box 1009 <br />Glenwood Springs, CO 81602 <br />