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<br />HYDROLOGIC MONITOR WELL COMPLETION <br />During the 1985 field season, 14 of the coal-exploration drill <br />holes were completed by the United States Geological Survey-Water <br />Resources Division as hydrologic monitor wells. As part of the <br />USGS-WRD's hydrologic assessment program at Hart Syncline twelve <br />alluvial wells and two stream gauging stations were also <br />installed within the Federal Coal Exploration License Boundary. <br />The following describes the method of completion of the <br />hydrologic wells. <br />ALLOVIAL WELLS <br />The twelve alluvial wells were constructed in the valleys of Deep <br />Rock Gulch and Waddle Creek. The wells were auger drilled 3" in <br />diameter to a depth of less than 27 feet. Two inch PVC well <br />casing was installed, gravel packed, and a bentonite plug 5 to 10 <br />feet below land surface set. An attached copy of the 7.5' <br />Hamilton Quadrangle shows the location and number of the alluvial <br />monitor wells (Attachment 1). Appendix II, entitled "Types of <br />Surface Completion of Hydrologic Monitor Wells," demonstrates the <br />completion method of the alluvial wells. <br />STREAM GAGGING STATIONS <br />Two stream gauging stations were placed along the Waddle Creek <br />and Deep Rock Gulch drainages. The stations utilize natural <br />markers along the stream bed to measure the unrestricted water- <br />flow at various times of the year. <br />The locations of the stream gauging stations are also shown on <br />the attached copy of the 7.5' Hamilton Quadrangle map <br />(Attachment I). <br />