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M-1978-349 (Dick Casey Concrete Pit) <br />2009 Technical Revision <br />March 31, 2009 <br />Page 4 <br />The revised Exhibit C-2 enclosed with this Technical Revision illustrates recovery of <br />aggregate resources to near mining limits. See annotations on txnimt U Tor <br />additional explanation. Recovery to the internal property lines of Applicant Oldcastle <br />SW Group's overall land holdings in the area is feasible because this plan presents <br />no risk to permanent man-made structures other than facilities within 200 feet of the <br />property line controlled or maintained by the Applicant. Mining setbacks to external <br />property lines are established at 50 feet. Setbacks of 50 feet provide adequate <br />stability for excavation and reclamation and are subject to existing geotechnical <br />analysis or agreement with any affected structure owner within 200 feet. <br />Crushing and sorting equipment and surge piles are located on the pit floor. <br />Equipment may be moved within the pit floor for efficiency. <br />Dewatering <br />Dewatering does not presently occur within the permit limits of this mining pit. If <br />needed, the site can be dewatered as described in the standing Exhibit G from the <br />original application. Currently, the adjacent Chambers Pit is kept dry with <br />dewatering equipment, temporarily eliminating the need for pumps in the Dick Casey <br />Concrete Pit. <br />Earthmoving Operations <br />As revised, the maximum amount of mineable reserve will be 1.3 million cubic yards, <br />or approximately 2.0 million tons, representing an increase of approximately 15 <br />percent from the original mining plan. Construction materials will be mined, sized <br />and used to make concrete and asphalt at the processing site or removed and used <br />for other aggregate products. Relative to existing plans, nominal additional <br />movement of materials will be required for concurrent reclamation. <br />4