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Meteorological Data 10 <br />No meteorological data is collected at the Yoast Mine. SCC maintains a <br />weather station (wind speed and direction, temperature and <br />precipitation) at its adjacent Seneca II-W Mine. The reader is referred <br />to that AHR, Appendix B. SCC also maintains a precipitation gage at its <br />adjacent Seneca II Mine. Data from that gage for this year are included <br />on Table 1. A summary of all data collected at that gage is provided <br />here in Table 2. <br />Data from the National Climatic Data Center's Hayden Station is used <br />here to evaluate the precipitation trend. For this year, 19.68 inches <br />of precipitation was measured, which is 2.34 inches (13%) above the <br />1971-2000 average. The months of October, December, January, February, <br />March, May and September were above average. Snowpack runoff, as <br />estimated by totaling November through March precipitation values, was <br />10.98 inches, which was 3.80 inches (53%) above the 1971-2000 average. <br />• <br />Ground Water <br />Water Levels. Table 3 provides a summary of ground water monitoring <br />sites at the Yoast Mine. Water level data are provided in Appendix B. <br />Water level reports for the past six years are presented immediately <br />after the water level hydrograph of all data since 1991. Water level <br />measurements are collected with an electrical water level indicator or a <br />steel tape. Pressure readings (in psi) obtained from flowing wells with <br />pressure gages are multiplied by 2.31 to obtain head in feet. The <br />current ground water monitoring program is presented in Table 15-8 of <br />the Yoast Mine PAP. <br />Ground Water Level Summary. This year, water levels at all wells fell <br />within their historic ranges, with the following exceptions. Wadge <br />overburden well YOV30 has experienced a general decline in water levels <br />since it was first monitored in 1991. Water levels this year at Annand <br />2