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After their review of last year's Yoast AHR, the CDMG made several ~ • comments in a letter dated March 26, 2004. In that letter, the CDMG requested the Spoil Spring YSSPGI (first sampled in September 2002) be included into the monitoring program in the permit. The second item dealt with the discussion of ground water quality use standards. The CDMG's request will be incorporated into this AHR. Meteorological Data No meteorological data is collected at the Yoast Mine. SCC maintains a weather station (wind speed and direction, temperature and precipitation) at its adjacent Seneca II-W Mine. The reader is referred to that AHR, Appendix B. SCC also maintains a precipitation gage at its adjacent Seneca II Mine. Data for this year are included on Table 1. A summary of all data collected at that station is provided here in Table 2. Data from the National Climatic Data Center's Hayden Station is used here to evaluate the precipitation trend. For this year, 17.66 inches of precipitation was measured, which is 0.32 inches (2~) above the 1971- 2000 average. November, December, February, April and September were all above average. Snowpack runoff, as estimated by totaling November through April precipitation values, was 9.45 inches, which was 0.70 inches (88) above the 1971-2000 average. The Seneca II precipitation gage measured 16.59 inches this year. This value is 1.96 inches (11$) below the 1981-2004 average. Snowpack runoff, estimated using the Seneca II precipitation gage, was 8.83 inches (November-April total), which is 0.56 inches (68) below the Seneca II 1981-2004 average. This is the fifth year in a row of below average precipitation at Seneca II. These values are more relevant than the Hayden Station data when evaluating the spring runoff observed this year at Yoast. Especially noteworthy is the March precipitation value, 0.40 inches, which is the lowest on record. It was also unusually warm that month, resulting in an early snowpack runoff. • 2