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• Red Canyon Mine - 1997 AHR Page 4 <br />GROUND WATER <br />Table G-95 shows the ground water monitoring results for this water year compared to the <br />averages of previous monitoring results for the same months. The alluvial piezometers (P- <br />~1 & P-2) showed water levels consistent with prior years averages. <br />~~~y he Division's letter dated March 3, 1994 requested that the wells completed in the E--~ <br />k~' ~,>S• ~ Seam be monitored to determine at what level the workings have been flooded. The 1987 <br />~,,~~ A ual h drolo is report predicted the water in the mine workings would reach the water <br />~S evel in E-1, 635 1993. The water leve{ in E-1 during May and September 1997 was <br />J~,rp~e~ 6 ~rtd-637T.2 respectively. It is unlikely this monitoring well reflects the water level <br />~~ in the mine. According to the Hydrology and Alluvial Valley Floor Report, prepared by r <br />` Kaman Tempo, well E-1 was developed to determine the water level and aquifer J <br />characteristics of the E Seam. The elevation of the surface where the mine portals were <br />developed is approximately 6400. -~ PGA r4 r: P,,.•~ ~ ole.,a F, :.. w5 t cr3fa' <br />The PHC predicts that a spoil aquifer with a peak discharge of 30 gpm will develop in the <br />underground waste disposal area and backfilled areas of the reclaimed topography. There <br />have never been any springs or seeps observed at the waste disposal area or reclaimed <br />mine site. There is no indication a spoil aquifer has developed in the reclaimed waste <br />• disposal area or reclaimed mine site. <br />MINE WATER <br />The underground workings were not accessible for mine inflow monitoring in 1997 nor will <br />they be accessible in the future. The water level in the mine is projected to stabilize below <br />the portal according to the Kaman Tempo Report, Volume 8 of 8 of the permit application. <br />For a projection of the mine filling schedule, please refer to the 1987 Annual Hydrologic <br />Report. <br />CONSUMPTIVE USE <br />None. <br />METHODS <br />The following narrative explains the methods used to perform the current monitoring <br />requirements: <br />1'N <br />A Cole Parmer pocket-size tester. Range: -1.0 to 15.0 pH. Resolution: 0.1 pH. Accuracy: <br />+/- 0.1 pH. Automatic temperature compensation 0 to 50 °C. Operating temperature: 0 to <br />50 °C. Up to three point calibration 4.0, 7.0 and 10.0 <br />