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~' <br />Data from the National Climatic Data Center's Hayden Station is used <br />here to evaluate the precipitation trend. For this year, 18.62 inches <br />of precipitation was measured, which is 1.28 inches (7~) above the 1971- <br />2000 average. December, February, April, May, June and September were <br />all above average. Snowpack runoff, as estimated by totaling November <br />through April precipitation values, was 11.33 inches, which was 2.58 <br />inches (29~) above the 1971-2000 average. <br />The Seneca II precipitation gage measured 15.90 inches this year. This <br />value is 2.74 inches (15$) below the 1981-2003 average. Snowpack <br />runoff, estimated using the Seneca II precipitation gage, was 8.62 <br />inches (November-April total), which is 0.79 inches (8$) below the <br />Seneca II 1981-2003 average. This is the fourth year in a row of below <br />average precipitation at Seneca II. These values are more relevant than <br />the Hayden Station data when evaluating the spring runoff observed this <br />year at Seneca II. <br />Ground Water <br />Water Levels. Water level data are presented in Appendix B. Water <br />level reports for data collected since 1998 are presented immediately <br />after the water level hydrograph of all historic data for each <br />respective well. By presenting all historic data, trends related to <br />seasonal and annual variability and possible mining related impacts are <br />more clearly evident. Table 3 (Summary of Ground Water Monitoring <br />Wells) is presented as a reference for the reader. No wells were <br />drilled or abandoned this year. The ground water monitoring program is <br />presented on pages 7-341/342 of the Seneca II PAP. Water level <br />measurements obtained in non-flowing wells are taken with water level <br />indicator, or in the case of a few shallow alluvial wells, directly from <br />a steel tape. Pressure readings (in psi) obtained from flowing wells <br />with pressure gages are multiplied by 2.31 to obtain head in feet. For <br />the sake of brevity, the prefix that precedes all well names will be <br />dropped throughout this report (except in the case of nested wells with <br />. a similar number). As an example, Well SCAL46 will be referred to as <br />Well 46. <br />3 <br />