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<br /> <br />Bear Creek Quarry (M-1977-344) Permit Amendment <br />Holcim US Inc, 3500 Highway 120, Florence, CO 81226 <br />Phone (719) 288-1443 www.holcim.us 45 <br />In Years 10 to 20, mining will continue in the northwest corner of Section 24, depleting the limestone in <br />this area by Year 20. Mining will also continue south into Section 25 during Years 10 to 20. Approximately <br />269 acres will be mined in Sections 24 and 25 during this period, including continued extraction of Codell <br />sandstone in Section 24. <br />At the end of year 20, contemporaneous reclamation will begin in Section 24. As mining progresses into <br />the east portion of Section 25, overburden may be hauled to Section 24 for rebuilding slopes to 3H:1V. <br />Reclamation will continue similarly as mining progresses into the Pueblo County sections. <br />In Years 20 to 30 mining will continue in Section 25 moving east across the resource. This period will <br />experience the highest strip ratio as the thickness of the overburden will be the thickest throughout the <br />deposit. Extraction from the top 15 feet of the Codell sandstone will continue in Section 25 once sufficient <br />acres of limestone have been removed to expose the top of the Codell sandstone. Phase reclamation will <br />continue in Section 24 and the area used for sandstone extraction in Section 24 will be backfilled and <br />reclaimed. Approximately 240 acres will be affected during this period. <br />In Years 30 to 40 mining will continue in an easterly direction. Extraction from the top 15 feet of the Codell <br />sandstone will continue in Section 25. It is estimated that the limestone in Section 25 will be depleted <br />during the last half of this 10-year period and mining will continue moving eastward into Sections 1 9 and <br />30 in Pueblo County. Approximate affected acreage during this 10-year period is 478 acres. <br />During Years 40 to 100 (approximate life of mine) mining progression is speculative at best. Mining will <br />continue eastward through the deposit in similar manner as described above including contemporaneous <br />reclamation in mined out areas. <br /> <br /> <br />Figure 2.4.3-1 Mine Plan Blocks