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Memo - H. Bruce Humphries - 6 - November 16, 1989 <br />Concerns Submitted By Resolutions <br />17. Mulch or mulch and netting should Greg M. Nagel The Division will require Castle <br />be used on reclaimed slopes. Concrete to ensure that excessive <br /> erosion does not occur. The company <br /> has several options available to them <br /> with respect to methodology. <br />18. Castle should commit to using a Mansfield Development These concerns more appropriately <br />proven method to prevent future Corp, address the Phase III amendment plans <br />rock slides when mining in existing and not the Corrective Action plans. <br />or new areas. Castle Concrete's Castle Concrete has stated they intend <br />new areas. Castle Concrete's 2' to use four preventative methods to <br />setback in the proposed Phase III avoid future rockfalls, and is fully <br />amendment area is inadequate to preventative methods to avoid <br />protect west slopes from more aware that should more rockfalls <br />rockfall. Poorly-designed mining occur, Castle Concrete would again <br />plans for the Phase III area may be faced with possible Violations. <br />result in additional violations <br />that could subsequently involve <br />future permit boundary increases. <br />/ern/yjb <br />cc: Steve Renner <br />John T. Doerfer <br />1155E <br /> <br />• <br />