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MINE`ID # OR PROSPECTIN~ID#: M-1977-342 • PAGE: 5 <br />INSPECTION DATE: 11-14-00 INSPECTOR'S INITIALS: ACS <br />installation only. If the culvert will remain in place past November 15, 2001, the <br />approval must be renewed. It is Henderson's responsibility to rert~ove the culvert <br />and restore the canal prior to November 15, 2001 or to request a renewal of the <br />culvert installation in the diversion canal Environmental Protection Facility. <br />Topsoil salvage and management for the area below the ultimate taili~ag elevation was <br />observed and discussed. Alternatives to stripping and stoc}:piling topsoil <br />immediately following clearing and grubbing operations were considered. The Division <br />agrees with and approved topsoil handling practices in this area thzit could include <br />leaving the topsoil in place temporarily and seeding or otherwise stabilizing in <br />place topsoil as needed following logging. Acceptable topsoil manag~=_ment could also <br />include pushing the topsoil resource up the hill to an elevation above the ultimate <br />tailing surface and windrowing that material for consolidation into stockpiles at <br />a later time. If this practice in used, the windrows would have to be seeded and <br />other management practices such as silt fencing or toe ditching may be necessary. <br />Under any topsoil management scenario, the reclamation permit requires that all <br />viable topsoil be salvaged from the tailing basin in advance of tai:.ing inundation. <br />There are currently two topsoil stockpiles located below the ultimate tailing surface <br />elevation. These stockpiles must be moved prior to inundation. Rule 3.1.9(4) of <br />the Hard Rock/Metal Mining Regulations requires that a topsoil stoc}~ile relocation <br />plan be approved under a technical revision to the reclamation permit. Henderson <br />is referred to a letter from the Division of Minerals and Geology (Allen Sorenson) <br />to Climax Molybdenum Company (Anne Beierle) dated December 17, 1998. This letter <br />provides a discussion of the Division's position on topsoil salvage requirements in <br />the Henderson Mill tailing basin. The Division considers topsoil salvage at the mill <br />site to be a critical component of the long-term success of tailing reclamation. <br />Topsoil salvage operations should be supervised by a person experienced in soil <br />science that can identify viable plant growth medium that is worth~~ of salvage. <br />cc: Carl Mourit, DMG <br />I & E Contact Address <br />NAME Erich Bower <br />OPERATOR Climax Molybdenum Comoanv <br />STREET 19032 County Road 3 <br />CITY/STATE/ZIP Parshall, CO 80468 <br />