2010-04-27_INSPECTION - M2000082

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_ MINE ID # OR PROSPECTING ID #: M-9000-029 INSPECTION DATE: 3-41-9nin INSPECTORS INITIALS: _ 11 F OBSERVATIONS This was a normal monitoring inspection of the East 8th Street Operation, DRMS File No. M-2000-082 operated by Aggregate Industries WCR- Inc. This site is located at the southeast corner of East 8th Street and Ash Ave. in Greeley, Colorado in Weld County. I, Jared Ebert of the Colorado Division of Reclamation, Mining and Safety conducted the inspection. Mrs. Connie Davis of Aggregate Industries WCR - Inc. accompanied me on the inspection. The site consists of a six acre pit excavation located in the mining Phase II area. The processing facilities are located just west of the pit excavation. The Operator has not constructed the asphalt and concrete batch plants at this time. The processing equipment on site consists primarily of conveyors and a fuel tank. A scale house and scale has been constructed at the southwest corner of the permit area. The Operator has stripped the topsoil from the affected land and have placed it in stockpiles north of the pit excavation and in the southwest corner of the site. The overburden has been placed in a stockpile located along the western permit boundary adjacent to Ash Ave. The Ogilvy ditch has not been relocated at this time. The City of Greeley has an asphalt and concrete recycling center located on the northeast corner of the permit area. During the original permitting process, the Operator attempted to acquire structure damage reimbursement agreements for several structures located on or within 200 feet of the affected land. In a letter dated November 9th, 2000 the Operator stated they were unable to provide structure damage agreements from the Colorado Department of Transportation (Highway 263/ East 8th Street), the Ogilvy Ditch Company (The Ogilvy Ditch), and the Greeley Gas Company (Gas line and Marker). The Operator committed to maintaining a 200- foot setback from these structures until they received an executed agreement from the structure owners, or they would submit and receive approval of an appropriate engineering evaluation demonstrating the Operator will not damage the structures as a result of the mining operation. At this time, the Operator has mined and affected land within 200 feet of these structures. The Division was unable to find structure damage reimbursement agreements or an approved engineering evaluation for these structures. This issue is cited at the end of this report and will require corrective action to be taken by the Operator. The Operator will need to submit the required notarized structure damage re-imbursement agreement as it is described in Rule 6.4.19. Or, the Operator will need to submit a Technical Revision to the mining plan with an engineering analysis that demonstrates the structures will not be damaged by the activities occurring at the mining operation. The Operator has been submitting ground water monitoring data for two monitoring wells with their annual reports since 2003. The ground water monitoring plan has not been fully implemented as required. The Operator committed to a two phase monitoring plan to collect data from five wells. Phase 1 monitoring includes data collection from two wells located within the permit boundary. These wells were installed to collect baseline ground water data and for early observation of groundwater drawdown effects. Phase 2 monitoring includes data collection from three wells to be installed north of the operation along Balsam Street at a distance of 500, 1000, and 1500 feet from the pit. These wells will allow for long-term observation of potential ground water drawdown effects from the dewatering operation. The phase one monitoring wells were installed and have been monitored on a monthly basis ever since April of 2003. The Phase 2 monitoring wells were supposed to be installed at least one month prior to initial dewatering of the mining Phase II portion of the operation. Both Phase 1 and Phase 2 ground water monitoring have various monitoring frequency requirements depending on how certain phases are dewatered. According to the June 2007 annual