Laserfiche WebLink
!'ague 13 <br />The Wildcat Mining response to adequacy review dated April 27, 2009 (received by DBMS May 13, 2009) <br />states that the road is permanent, and thus will not be removed and reclaimed after its use for access for <br />mining and milling operations. <br />A copy of the Department of the Army Permit Wildcat Mining obtained for construction of the road is <br />enclosed with the adequacy response dated April 27, 2009. Special condition no. 7 to the Army Permit states <br />"(t)o avoid future impacts to wetlands that could occur as a result of road failure, a geotechnical engineer <br />shall be present on-site while constructing the road to further assess slope stability, based on additional <br />subsurface exploration." <br />Additional Information Required <br />The road was built without first permitting the plans and construction methods through DRMS, and it was <br />not constructed to DRMS performance standards. The road, as constructed, cannot be approved by DRMS to <br />remain permanently due to the use of native timbers in an effort to stabilize and retain fill. If the DRMS <br />were to approve timber cribbing for road construction, pressured treated lumber would be required. For the <br />road to be permanent, a plan for fill stabilization and retention that does not rely on the native log timbers <br />must be submitted, approved, and executed. Until that is done, DRMS must require and bond for complete <br />road removal and reclamation. <br />The road fill above the pond is moving down slope as described in the inspection observations section of this <br />memo. The instability of the fill is a safety issue for users of the road, and an environmental issue due to the <br />encroachment of fill into the pond and the riparian zone of the La Plata River and the potential for larger <br />scale landsliding of the fill into these sensitive zones. Wildcat must provide a plan and schedule for <br />stabilizing the road or a plan and schedule for removal of the road and reclamation of the affected land. If a <br />plan for stabilization is provided, it must include a report from the geotechnical engineer who was on-site <br />during construction as required by the Department of the Army. The geotechnical report must describe all <br />aspects of the construction of the road fill, and include photographs and the results of geotechnical tests <br />conducted. The plan must include laying back and vegetating the cuts in sand and gravel with cobble. <br />Oacs files\My Documents 4-19.06 thrulidaho mill road review.docx