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• Technical Revision 28 was approved on May 20, 2005. In this revision, Spoil Spring 1 was added to the monitoring program. The monitoring frequency at Sites YSSF3 (upper S age Creek) and YSGFS (upper Grassy Creek) was changed from monthly to triannual. Monitorin g at Springs 6 and 10 was discontinued. Finally, t he surface and ground water parameter lists were revised. Details of the changes may be found on pages 25 and 26, Tab 15, of the permit. 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, 19.74 inches of precipitation was measured, which is 2.40 inches (14$) above the 1971-2000 average. October, November, January, February, March, April and June were all above average. Snowpack runoff, as estimated by totaling November through March precipitation values, was 7.53 inches, which was 0.35 inches (5~) above the 1971-2000 average. The Seneca II precipitation gage measured 17.02 inches this year. This value is 1.53 inches (8~) below the 1981-2004 average. Snowpack runoff, estimated using the Seneca II precipitation gage, was 5.50 inches (November-March total), which is 1.93 inches (35~) below the Seneca II 1981-2004 average. This is the sixth 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. • 2