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S/C Doc Date:12/11/2001 III IIIIIIIIIIIII III <br />L 2.5.4.2 Collection of New Information <br />• Construction, Equipment and Methods -Collection of information within <br />the study area included monitoring of water from surface flows, alluvial wells and <br />the Wadge Coal seam in conjunction with analysis of the water bearing rnaterial. <br />Alluvial wells along Trout Creek and Oak Creek were angered to bedrock, <br />cased with 4 inch pvc pipe slotted over the depth of the water bearing rnaterial, <br />gravel packing installed in the annulus, and the well developed by pumping. Three <br />of the holes drilled on the Moffat Area for geologic analyses were cased with 4 inch <br />steel pipe to allow ongoing monitoring of any water in the Wadge Coal seam and <br />odjacent stroto of interest (05-01-0004, 0005, and 0010). Another cased hole, WWLL <br />IC was completed in similar fashion. <br />The transrnissivity of the water bearing formation encountered on the Moffat <br />Area was determined by a drawdown-recovery pump test method. Similarly, an auger <br />hole test was made on an alluvial well along Trout Creek for determination of the <br />hydraulic properties of the alluvial material. Water quality was monitored monthly <br />at the surface collection points and in the alluvial wells. The bedrock wells on the <br />Moffat Area were sampled once. <br />• Stream gaging stations were installed on Trout Creek at the upstream and <br />downstream study area boundaries and on Oak Creek. The gaging stations consist of <br />stilling wells constructed from 30 inch diameter corrugated metal pipe installed <br />adjacent to The streams. Three I I/2 inch pvc pipes were placed connecting the <br />ihalweg and the stilling well. Two of the pvc pipes serve os the water intake lines <br />and the third pipe as a conduit for thermograph sensors. Metal covers were instolled <br />over the stilling wells to protect the recording equipment. <br />Flow recorders (Leupold and Stevens Type F, battery driven, 30 day units) <br />were installed in the stream gaging stations and on flumes on two active irrigation <br />ditches leaving Trout Creek within the study area. Thermographs (Weather Measure <br />Corporation Type T601, battery driven, 30 day units) were also installed in the gaging <br />stations for continuous temperature records. Staff gauges were installed in the <br />streams and flumes for correlation between the flow recorders and sTrearn stage. <br />Crest stage gauges were installed adjacent to the stream gaging station to <br />measure the monthly maximum stream stage. The crest stage gauges consist of a <br />I I/z inch steel pipe anchored in a vertical position with the bottom cap perforated <br />and containing a removable calibrated stick. Powdered cork was placed in the <br />• bottom of the pipe to register the highest water level on the calibrated stick. <br />2.5-106 <br />