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Revegetation <br />As mining operations are completed, areas for reclamation will be graded and shaped for <br />revegetation. Runoff or excess water from adjacent areas will not be allowed to flow over slopes <br />being seeded. If needed, berms or channels will be constructed to divert excess water and <br />dispose of it in a safe and non-erosive manner. Seed mixes will remain consistent with the <br />previously approved DRMS permit. <br />If a significant invasion of noxious weeds occurs after seeding, the weeds will be mowed before <br />they can go to seed. The areas will be mowed periodically for additional control as needed. <br />Mechanical control will be used as a first priority. Chemical methods will only be used if no <br />other alternative produces acceptable results. <br />Water -General Requirements <br />To minimize the effect on the prevailing hydrologic balance, the operator shall: <br />a. Comply with applicable Colorado water laws. <br />b. Comply with all applicable Federal and State water quality laws and regulations. <br />c. Comply with all Federal and State requirements for dredge and fill. <br />d. Re-grade and backfill all sediment and siltation structures after mining is completed. <br />Groundwater- Specific Requirements <br />The operator will not affect groundwater quality on or off the site. The operation will comply <br />with State groundwater quality standards. Due to the absence of sources of potential pollutants, <br />groundwater quality monitoring is not required in this operation. The mining and reclamation <br />will affect the groundwater table surrounding the mine site. Specific details and mitigation <br />efforts are included in Exhibit G. <br />GRANITE RECLAMATION <br />The proposed reclamation plan includes a sealed empty reservoir with a potential water surface <br />elevation of approximately 5790 feet. This proposed reservoir layout would result in a future <br />storage volume of approximately 8,600 acre-feet with a surface area of approximately 39 acres. <br />The proposed reservoir would be lined with the granite benched mining highwalls. Point- <br />plugging of any leakage will be performed through grouting if necessary, although no major <br />grouting is anticipated. <br />The granite quarry reclamation plan is to include blasting down some bench areas to create a <br />more natural talus slope effect and to revegetate other bench areas. Front Range Aggregates is <br />committed to reclaiming approximately 35% of the quarry flow. There are inadequate quantities <br />of topsoil to salvage for reclamation of the entire quarry; however, mixing available topsoil with <br />crusher fines will help to create a plant gowth medium that will allow reclamation for more area <br />than would otherwise be able. <br />Overburden/Topsoil Placement <br />Traditional topsoil is not readily abundant on the subject facility site. The overburden present <br />consists of approximately 5 ft to 10 ft of sand and weathered granite. Overburden will be <br />removed and stockpiled within the mining limits until it is needed in reclamation. <br />Front Range Aggregates, LLC- Padu(ole Quarry <br />OMG 172 Permit Amendment <br />Page 21 <br />