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HYDRO21263
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Last modified
8/24/2016 8:42:50 PM
Creation date
11/20/2007 2:08:03 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981023
IBM Index Class Name
Hydrology
Doc Date
9/16/1982
Doc Name
PRELIMINARY AQUIFER ANALYSIS AND ESTIMATION OF GROUNDWATER INFLOW TO TWO OPEN PITS
Permit Index Doc Type
OTHER GROUND WATER
Media Type
D
Archive
No
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<br />1 <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br />1 <br />1 <br />1 <br /> <br />6. <br />and final drawdown for each step was 5, 9.4 and 38 gpm and 0.04, <br />0.07 and 0.46 feet, respectively. Test data are presented in <br />Appendix A. <br />Monitor well W-16, located 40 feet from the pumped well (W-15) <br />showed no drawdown during the test. Field analysis of the step <br />drawdown test data indicated that the pump supplied was not <br />capable of discharging enough water to significantly stress the <br />alluvial aquifer. After discussions with CRCC and the CMLRD, it <br />was determined that the step drawdown test was sufficient to <br />enable the estimation of the aquifer transmissivity within an <br />order of magnitude. Interpretation of the step test and a <br />listing of the test data is presented in section 4.1 and <br />Appendix A, respectively. <br />3.3 CONSTANT DISCHARGE TEST AT WELL W-9 <br />Two wells, pumped well W-9 and observation well W-10, are <br />located along the Barren Ridge and are completed into the coal <br />bearing Fruitland Formation. These wells were used to evaluate <br />bedrock aquifer characteristics. A submersible pump capable of <br />producing 10 gpm was placed in well W-9 on September 7, 1982. <br />A step drawdown test was not necessary because previous pump <br />test data was available, and indicated that the well would pro- <br />duce 4 gpm for a period exceeding 24 hours. <br />A 24 hour constant drawdown and recovery test was initiated at <br />0745 hours on September 8, 1982. A discharge of approximately <br />4 gpm was maintained throughout the test. Interpretation of the <br />test, test data summary, and evaluation of the pumping data are <br />presented in section 4.2, Appendix B, and Appendix C, respec- <br />tively. <br />DR PrtEAU6 ASSOCIP IES IIMRED . <br />
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