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n <br />L~ <br />4.0 SPRING IIIVENTCIRY AND LOCAL HYDROLOGY <br />One spring was located ir. the project area and is in the NE1/4 of Section 2, <br />T.11S., R.98W. (Plate I). This spring is enclosed completely and is <br />currently used for a domestic water supply. The source of the spring is not <br />known, and flow is estimated by the owner to be a Pew gallons per minute. <br />Field analysis oP the water from the house tap is given below. <br />Temperature <br />PH <br />Specific Conductance <br />12.5°C <br />7.4 <br />68O micromhos/cm ® 25°C <br />The low temperature and specific conductance of the water indicate a <br />• <br />shallow source. <br />No other seeps or springs were Pound ir. the project area. The occurrence <br />and elevation of a water table in the unconsolidated material are not <br />known. Potentiometric elevations in a monitoring well located near Rapid <br />Creek (Table 1) and completed in an urderlping coal seam indicate water <br />levels at least 15 Peet below the creek elevation. Therefore, bedrock <br />related ground-water discharge does not occur in this area. <br />Flow of Rapid Creek is currently monitored through a four-foot Parshall <br />flume. A flow measurement of 4.5 cubic feet per second was taken at 1535 <br />hours on April 29, 1982. Additional flow data are presented in PCC permit <br />applications (Powderhorn Coal Company, 1982; GEg Colorado, Inc., 1981 a; GF~ <br />• <br />Colorado, Irc., 1981 b). A comparison oY mean daily flows for the time <br />9 <br />Hydro-Search, IC1C. Reno • Denver . au~rin <br />corsu~nrc r+vCaoiocasn~aocisTs <br />