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Wells YWC31 and YWCU31 were abandoned on October 26, 2001. They were • <br />about to be buried in spoils. Wells YWC33 and YWCU33 were completed in <br />August 2002 to replace those wells. Technical Revision 22 was submitted <br />to the CDMG on December 4, 2002 to incorporate the new well into the <br />monitoring program. <br />Meteorological Data <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 for this year are included on Table 1. A <br />summary of all data collected at that station is provided here in Table <br />2. <br />Data from the National Climatic Data Center's Hayden Station is used <br />here to evaluate the precipitation trend. For this year, 12.37 inches • <br />of precipitation was measured, which was 4.47 inches (263) Less than the <br />1961-1990 average. Only March, April and August were above average. <br />Snowpack runoff, as estimated by totaling November through April <br />precipitation values, was 6.9D inches, which was 1.51 inches (18$) below <br />the 1961-1990 average. <br />The Seneca II precipitation gage measured 11.86 inches this year. This <br />value is 6.90 inches (37$) less than the 1981-2002 average, and is the <br />lowest on record. Snowpack runoff, estimated using the Seneca II <br />precipitation gage, was 5.96 inches (November-April total), which is <br />3.49 inches (373) less than the Seneca II 1981-2002 average. This is the <br />third year in a row of below average precipitation at Seneca II. These <br />values are more relevant than the Hayden Station data when evaluating <br />the spring runoff observed this year at Yoast. <br />• <br />2 <br />