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<br />' December 1992 lbe Rorkcast/e Company * Grasry Gap Mine " 1991 Annual Hydrology Repon • 1 <br />1.0 INTRODUCTION <br />In accordance with the existing Mining and Reclamation Permit and the Colorado Wastewater <br />' Discharge Permit for The Aockcastie Company's (Rockcastle) Grassy Gap Mine in Routt <br />County, Colorado, the following tasks have been performed during 1992: <br />• Mon[hly monitoring of the five surface water dischazge points <br />• Quarterly field measurements and annual or semi-annual laboratory analyses at <br />several surface and groundwater sampling locations <br />' • Annual seep and spring survey <br />The mine is currently on active status. No mining operations have occurred for several years <br />I ' and reclamation of the six pits is in varying stages of completion pending approval of permit <br />revisions and final closure. During the year, final reclamation of Pits 2, 3, 4, 5, and 6 and the <br />associated ponds has been completed and requests for final bond release have been submitted. <br />' The above mentioned tasks and the corresponding findings and results are summarized in this <br />report. Previous correspondence with the OMLR and Rockcastle during 1992 are referenced <br />and included as appendices to this report. <br /> <br /> <br /> <br />1 <br />1 <br />t <br />1 <br /> <br />VlIANHtt1RYr A CZ ]nr. * P.O. Box 774018 * Steam{nat Springs, Colonulo 80477 * (303J 8796260 <br />]/1oi91 ,e., <br />