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REP45700
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Last modified
8/25/2016 12:48:34 AM
Creation date
11/27/2007 10:41:21 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980005
IBM Index Class Name
Report
Doc Date
3/20/2006
Doc Name
2005 Annual Hydrology Report Letter to Appendix B
From
Seneca Coal Company
To
DMG
Annual Report Year
2005
Permit Index Doc Type
Hydrology Report
Media Type
D
Archive
No
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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, 19.74 inches <br />of precipitation was measured, which is 2.40 inches (14~) above the <br />1971-2000 average. October, November, January, February, March, April <br />and June were all above average. Snowpack runoff, as estimated by <br />totaling November through March precipitation values, was 7.53 inches, <br />which was 0.35 inches (5~) above the 1971-2000 average. <br />The Seneca II precipitation gage measured 17.02 inches this year. This <br />value is 1.53 inches (88) below the 1981-2004 average. Snowpack runoff, <br />estimated using the Seneca II precipitation gage, was 5.50 inches <br />(November-March total), which is 1.93 inches (35~) below the Seneca IZ <br />1981-2004 average. This is the sixth year in a row of below average <br />precipitation at Seneca II. These values are more relevant than the <br />Hayden Station data when evaluating the spring runoff observed this year <br />at Seneca Il. <br />• <br />Ground Water <br />Water Levels. Water level data are presented in Appendix B. Water <br />level reports for data collected since 2000 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 />We11s) 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 />3 <br />
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