2013-02-13_REPORT - C1981041 (2)

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Average TDS from Pages SE -8 = SE -11 Outfall 002 Water Year 1999 2000 2001 2002 TDS (mg /I) 1558 1560 1500 1500 2012 AHR pipe is presented on permit Figure 14 -6. The capacity of this discharge pipe was about 75 gpm. Flow ceased at discharge point 001 on March 31, 2002. Discharge point 001 was reclaimed during the 1 quarter of 2008 and is no longer operational. Discharge point 002 was water siphoned from the reclaimed Northwest Intake Portal at the Roadside South Portals. Mine inflows that were not pumped to the preparation plant were routed to an abandoned portion of the mine for discharge from this point. The preparation plant was shut down during December 1999 so all mine inflows in excess of those handled by outfall 001, flow north to the lower portion of the mine where they were handled by the siphon, outfall 002. Flow ceased at discharge point 002 on March 31, 2002. The following table presents the total dissolved solids concentration in Ouffall 002. Page 4 Discharge point 016 was put into service April 1, 2002. Discharge began April 3, 2002. This gravity discharge point handles all of the water that flows into the sealed South Portal. Since it is a gravity discharge point, the flow discharged will equal the flow into the mine. Table M12 -1 presents a summary of the monthly flow from the mine. Data page SV -11 presents a listing of flow and water quality monitoring performed at this site during the Year. Data page SU -4 includes a full suite analysis performed on a sample collected during the Year. The average TDS value at discharge point 016 for the Year was 1333.4 mg /I. Whole Effluent Toxicity (WET) tests were not performed during the Year. On May 3, 2005, Snowcap Coal Company requested, via letter to the CDPHE, the WET tests be terminated. This request was granted and the CDPS Permit was amended on June 27, 2005, becoming effective on August 1, 2005. Ground Water The ground water monitoring points on Cottonwood and Rapid Creeks were monitored twice during the Year. Results of the monitoring are listed on data page GA -2. Diagrams G12 -1 thru 3 shows a graphical representation of the depth to water for these wells since monitoring began in 1984. Table G12 -1 was prepared to show average water levels in the spring and fall to correspond with high and low water levels in the adjacent creeks respectively. Piezometers CRDA -01 thru 06 at the Cameo Refuse Disposal Areas (CRDA) No. 1 and No. 2 continued to be monitored quarterly. Data page GC -21 includes measurements for this Year. A