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-' <br />Research Mine Adit: Native rock was placed for a distance of at least 30 feet into the mine <br />and up to the existing steel doors. The native rock extended from the <br />mine floor to the mine back. An additional 10 to 20 feet of native <br />rock was placed outside of the adit portal to deter unauthorized <br />entrance, hide the existence of a portal, and to closely approximate the <br />pre-mining appearance of the area. <br />Other work performed by Reams Construction included installing security fence at the main <br />fan vent housing, repairing rock retaining fencing at the upper and lower mine benches, and <br />removing the concrete and steel canopy over mine portal L-l. <br />3 <br />