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Pa e 2 <br />i MINE ID # OR INSPECTOR'S <br />PROSPECTING ID #: M-1973-021 INSPECTION DATE: 7/21/06 INITIALS: CMR <br />OBSERVATIONS <br />The Morrison Quarry was inspected as part of the Division of Minerals and Geology's (Division) normal <br />monitoring and enforcement efforts. The last inspection was on 6/19/2002. Chris Rowe from the Division <br />carried out the inspection. Brian Crossan from Aggregate Industries -WCR, Inc. (Operator) was present as <br />the Operator's representative. The Morrison Quarry is a 355 acre site. There are three quarry sites within <br />the boundaries of the permit. Active mining is occurring in the North Quarry, the Central Quarry is currently <br />inactive, and the South Quarry has not yet been mined. <br />1. Geotechnical Addendum <br />The Operator is required to submit an annual Geotechnical Addendum as a condition to their permit <br />(AM03). The Geotechnical Addendums have been submitted as required. The Addendums are intended to <br />document the slope stability at the site. The mine operation utilizes an "observational method" of mining <br />that is intended minimize rock fractures during blasting operations, and reduce the risk of failure on the <br />terraced slopes. The Addendum examines the fractures, folding, faulting strike, dip, etc of the slopes at the <br />mine site. The most recent Addendum concludes that the slopes of the Central Quarry did not exhibit <br />visible instability, and the North Quarry did not exhibit visible instability except localized instability on <br />individual benches. The Division did not observe any failed slopes on site (note this is not a technical <br />finding by the Division). <br />2. Stormwater control <br />The Division examined the stormwater control features on the mine site. In general the stormwater was <br />contained on site, with some offsite runoff in the area of the main access road and processing facility. <br />Stormwater drains to the Central and North Quarries in much of the mine site. Stormwater is pumped from <br />the North Quarry to be used in dust suppression. There are a series of low spots around the processing <br />facility that slow and hold Stormwater. The access road has a series of rock structures along it that slow <br />stormwater and capture sediment as the stormwater runs downhill and offsite. These rock structures were <br />becoming full of sediment and the Operator should muck these structures out. The mine also utilizes a <br />truck undercarriage wash to reduce carrying sediment offsite. Stormwater sediment captured around the <br />site is being used as a growth medium in ongoing reclaimation projects. The stormwater controls appeared <br />to be functioning properly. <br />3. Signs and Markers <br />a. There was not an entrance sign as required by Rule 3.1.12; this will be a problem requiring corrective <br />action. See next section of this report for details. <br />b. Boundary markers appeared to be in place in those areas the Division examined. It appears that mining <br />has occurred up to or near the boundaries in a number of areas. These will checked in future inspections, <br />and the Operator is on notice to watch these areas carefully. The Operator appears to be taking measures <br />to ensure that mining does not occur outside the permitted boundary. <br />Enforcement and Inspection Contact Address <br />NAME: Pat Ward <br />OPERATOR: Aggregate Industries -WCR, Inc. <br />STREET: 1707 Cole Blvd Ste 100 <br />CITY/STATE/ZIP: Golden, CO 80401 <br />cc: <br />U.S. Army Corps of Engineers CO Hazardous Materials and Waste Division I <br />U.S. Bureau of Land Management CO State Engineers Office <br />U.S. Forest Service CO Water Quality Control Division <br />CO Department of Transportation OTHER: <br />