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WORWEST <br /> COR PORAT ION <br /> repeated two (2) more times for a total of three (3) measureable float recordings. The <br /> following equations will be used to calculate discharge in cubic feet per second (cfs). <br /> Cross-sectional area(ft)=mean width X mean depth <br /> Average float time(seconds) =(float time 1+float time 2+float time 3)/3 <br /> Float velocity(ft/second)=reach length/average float time <br /> Discharge (ft3/sec)=cross-sectional area X float velocity <br /> 2.3.2.4 Rating Curve <br /> A pressure transducer will be installed at each monitoring location to capture continuous <br /> stream depth and will be programed to collect data every 15 minutes. A rating curve will <br /> be developed using the continuous stream depth and instantaneous flow measurements. <br /> The rating curve will be used to calculate flow for each of the continuous stream depth <br /> measurements resulting in a flow hydrograph illustrating flow over time. Due to safety <br /> concerns with entering the streams during high flow conditions, the maximum <br /> instantaneous flow measurement will likely be below the actual maximum flow of the <br /> stream during spring runoff or heavy rainfall events resulting in a rating curve that does <br /> not properly calculate high flows. Therefore, maximum calculated flow will be set at the <br /> maximum measured flow plus two standard deviations of the data set. <br /> 2.4 GROUNDWATER MONITORING <br /> Figure 1-1 above illustrates the general area where the six (6) groundwater monitoring <br /> wells and one piezometer are located. Monitoring well permits were obtained prior to <br /> drilling the monitoring wells. The proposed monitoring wells were constructed in <br /> accordance with the RULES AND REGULATIONS FOR WATER WELL <br /> CONSTRUCTION, PUMP INSTALLATION, CISTERN INSTALLATION, AND <br /> MONITORING AND OBSERVATION HOLE/WELL CONSTRUCTION 2 CCR 402-2 <br /> (Well Construction Rules). Five (5) of the six (6) wells were constructed using a Solinst <br /> CMT 7-channel multi-level system which will included a borehole drilled to depth likely <br /> air rotary, air percussion, or continuous coring drilling methods, CMT casing and screen, <br /> bottom cap, a grout seal, and a stick-up or flush mount well cap. A sand pack was <br /> installed to monitor the selected intervals. A bentonite seal was installed between the <br /> sand pack zones. The top of each interval was "tagged" to verify the depth before the <br /> next material was added to the well. The monitoring well construction typically includes <br /> three completion zones designed to monitor the alluvium, shallow bedrock formations, <br /> and deep bedrock formations. Additional completion zones were included at select <br /> TRANSIT MIX CONCRETE CO. <br /> SURFACE WATER AND GROUNDWATER MONITORING PLAN <br /> 2-6 <br />