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<br />1.0In'troduction <br />' LACHEL FELICE & Associates, Inc. (LF&A), fomterly known as LACHEL and <br />Associates, Inc. (L&A), Golden, Colorado has prepared this 2005 independent <br />' annual structural geology evaluation for the Specification Aggregates (Spec-Agg) <br />Quarry located in Golden, Colorado (Figure 1). This study was conducted at the <br />' request of Lafarge West, Inc., owner of the quarry, as a requirement for State of <br />Colorado, Permit Number M-74-004. The structural geology evaluation includes <br />' obsen~ations and measurements from the quarry that have been obtained <br />annually by LF&A staff over the past eight years and from results of the <br />geotechnical investigation conducted by LF&A in 2003. .The purpose of the <br />annual evaluation is to monitor the impact of the structural geologic features on <br />' pit wall stability as mining progresses. The measurements, observations, and <br />structural analyses have been performed by LF&A geologists and engineers, and <br />' are applicable to the quarry at the time of the data was obtained (March, 2005). <br />More specifically, the goals of this study are as foNows: <br />• Map and photograph geologic discontinuities along each quarry wall and <br />' utilize the new data in validating and updating the existing structural geology <br />database; <br />' Analyze the new data relative to the existing data in order to verify and/or <br />modify existing conclusions, and to investigate possible emerging trends; <br />' Review and characterize the existing stability conditions at the quarry relative <br />to the current mine plan; <br />• Locate and document changes in groundwater conditions; <br />Locate and document any obvious slope instabilities. <br /> <br /> <br /> <br /> <br />