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• The average water levels in the alluvial piezometers were generally lower <br />than in the past. Variations in these water levels are likely tied to stream <br />levels and irrigation patterns. <br />The average water levels in the refuse piezometers were slightly higher than <br />normal. The pH on these piezometers was similar and the conductivity was <br />lower than normal. Approximately 5,000 tons of coal waste was placed on <br />the site in the fall of 1986 and a shallow cover of dirt was placed on all <br />exposed coal waste. No measurable springs were noted on the face of the <br />site. An area approximately 50' x 20' half way between R-4 and R-2 at an <br />elevation of approximately 6440' remained damp most of the summer. Diagram <br />G-85-1 submitted in 1985 remains representative of the piezometric surface <br />for the area. <br />The average water levels in the sediment pond piezometers was slightly lower <br />than last year's levels. These lower levels are due to the lower water level <br />in the pond which is due to mine discharge being diverted around the pond. <br />See diagram G-86 for minimum and maximum levels relative to the pond embankment. <br />Mine Mater <br />Table M-86 is a listing of monitoring results form mine inflows. A total <br />of 6.18 million gallons was estimated to have been pumped during the year. <br />The meter did not record all of the water due to coal in the line. The average <br />discharge for the mine was 13.9 gpm of which an estimated 6.9 gpm was from <br />• active mine inflows and 7.0 gpm was from the old mine. These flows are not <br />backed-up by mass average conductivity which would indicate a 5.5 gpm active <br />mine/8.4 gpm old mine split. The ending water level was 5.8' lower than <br />the beginning water level in the old mine, which would relate to approximately <br />2 gpm lower actual inflow into the old mine. The conductivity of the old <br />mine water continued to improve again this year. Inflows from UG-8 and UG-9 <br />were not measurable and, as in the past, were pumped to the main sump and <br />the old mine respectively. <br />The 1986 Mine Inflows Map of the Red Canyon #1 Mine was prepared from information <br />taken July 2, 1986. The only change on the map since the 1985 map is that <br />the pumps were removed from 8 North and from crosscut 20 + 40, #1 West Submain. <br />Consumptive Use <br />Table C-86 is a listing of domestic water usage as billed. Water usage was <br />so low this year that the water company did read the meter most of the time <br />therefore an accurate usage is not available. <br /> <br />page 2 <br />