2008-04-18_REPORT - M1977004 - Laserfiche WebLink

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i 1 A Sediment Embankment Report is submitted annually to the Colorado Division of Water Resources (CDWR) providing the results of the embankment-monitoring program. The 2007 report is provided in electronic Adobe Acrobat© Portable Document Format on the CD attached to this report. 4.5 Waste Rock Dumps The waste rock disposal areas v winter conditions prohibited asses program. Inspection results Indic Camp Creek waste rock dumps. monitor seasonal phreatic surface waste rock dumps. The piezome ' fluctuations in the depths to water the dry conditions of 2001 throug 2005 through 2007 were more continue to evaluate the cause anc levels in some piezometers and continues to be no indication of in. ' dumps. More detailed discussioi Geotechnical Report filed with the I 4.6 Water Quality Monitoring As outlined in TR4, Homestake h~ intended effectiveness of install monitoring was conducted in 2007 Lake discharge (Sample Point NF TCCDRN and TCC), the site disch and seep surveys performed in t reports (DMRs), pursuant to Colon 0022756, were submitted monthly Environment (CDPHE) for 2007. designated POC SW-33, shown on at SW-33 included, flow, dissolves pH, total suspended solids (TSS), potentially dissolved zinc, and whc the CDPS. During 2007, all analy ire inspected monthly during 2007, except when in accordance with the recommended monitoring to stable conditions for the Indian Creek and Tie Seven (7) piezometers were measured monthly to uctuations for both the Indian Creek and Tie Camp er measurement results indicate normal seasonal similar to those observed in past years. Following ~ 2004, the seasonal fluctuations observed during i line with historical variations. Homestake will possible effects of the seasonal spikes in the water observe surface features of the dumps. There Lability due to the phreatic levels in the waste rock s and figures are presented in the 2007 Annual ivision in December 2007 s monitored water quality since 1994 to verify the ion of the Pinnacle Adit plug. Water quality including sampling points located at the North Pit _), the Tie Camp Creek drainage (Sample Points irge POC (Sample Point SW-33), as well as spring ie spring and fall. Monthly discharge-monitoring do Discharge Permit System (CDPS) number Co- to the Colorado Department of Public Health and Monitoring for the CDPS was conducted at the Figure 3. Analytical tests conducted for the DMRs radium 226, total radium 226/228, total uranium, iota) dissolved solids, oil and grease (visual only), le effluent toxicity (WET) analyses as required by ical results were below the CDPS permit's 30-day Pitch Reclamation Project Colorado Mined Land Reclamation Board 2007 Annual Reclamation Report 21