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E. APPROACH: <br />l'o understand the hydrology of the Hart Syncline Area, existing <br />ground-water and surface-water conditions need to be determined. <br />In 19E5, an energy company +vill be drilling exploration holes in <br />the area. ' This is an ideal opportunity for the U.S. Geological <br />Surve;r to complete some of the exploration holes as water <br />observation wells. If this approach is followed, the study will be <br />divided into two phases. , <br />Phase 1 would include a preliminary review of the [iterature, <br />ri ling and completing 13 wells, and installing two stream <br />gaging stations. Drilling will be provided by industry. <br />Geologic and geophysical logging also will be done by <br />industry. l~he U. S. Geological Survey will complete wells and <br />conduct pumping tests. The preliminary literature review will <br />be to obtain pertinent information on the hydrolog}~ and <br />geology of the area. Four wells will be completed as soon as <br />possible after drilling. l'he nine other wells will be used to <br />observe water levels. Geologic and geophysical loos +vill be <br />run at all wells. 1Vater levels and water chemistry will be <br />determined at each well. Ground water will be analyzed for <br />major cations, major anions, nutrients, and trace e_ements. <br />Hie samples will be taken quarterly. The wells +vil1 be <br />located throughout the study area. <br />Stream discharge and stream water quality will be determined <br />along lYaddle Creel< and Deep Rock Creek at stream:-gaging <br />stations at tl~e northern boundary of the study area. <br />Surface-water samples will he analyzed for major cations, <br />major anions, and nutrients through this sampling period. <br />Trace elements and seciment concentrations will be measured <br />during peak flows. Approximately 12 surface-water samples will <br />be taken during the year. Low-flow and high-flow information. <br />frorc~ 1'~addle Creek will be compared with similar infcrmation <br />from Milk Creek which is in the area and which also receives <br />most of its flow from snov+melt. <br />Phase II will include a more intensive revie+v of the <br />literature, additional well pumping tests if necessary, <br />quarterly water-quality sampling from both ground vrater and <br />surface water, and data analysis. The analysis of the <br />ground-water data will define aquifer location(s), hydraulic <br />properties, and water eheriistry. The surface-vrater data will <br />show if the streams are gaining or losing, the surface-water <br />chemistry, and low flow and high-flow characteristics. <br />