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Mr. Raul Passerini, P.E. Page 3 <br />March 19, 2014 <br />Water Used for Concrete Production (from well permit no. 51594 -F) <br />Water consumption associated with production of concrete was calculated assuming an <br />average of 30 gallons of water for one cubic yard of concrete. Therefore the net consumptive use <br />associated with production of 51,900 cubic yards of concrete during 2013 equals 4.8 acre -feet <br />and production of 52,900 cubic yards of concrete from 2014 will equal 4.9 acre -feet. <br />Water Used for Truck Washing (from well permit no. 51594 -F) <br />Water consumption by concrete truck washing was estimated at 24.7 gallons of water per <br />cubic yard of concrete needed to wash the concrete trucks. Water utilized to wash concrete trucks <br />is collected from the wash area and is available for reuse. A 10 percent consumptive use loss <br />factor was applied to the total water used for the concrete truck washing. The estimated losses for <br />2013 and 2014 are 0.39 acre -feet and 0.40 acre -feet respectively. In addition to the water <br />consumption by concrete truck washing, water consumption due to regular vehicle washing was <br />estimated at 0.19 acre -feet per year which will come from well permit no. 51593 -F. <br />Water Used for Asphalt Production (from well permit no. 51595 -F) <br />Water consumption associated with the asphalt production is estimated at approximately 3 <br />gallons of water per ton of asphalt. For 2013 the asphalt production is estimated at 116,210 tons <br />which will result in a water consumption of 1.07 acre -feet and for 2014 the asphalt production is <br />estimated at 118,534 tons which will result in a water consumption of 1.09 acre -feet. <br />Water Used for Dust Control (from well permit no. 51595 -F) <br />Based on water meter records for the period of 2009 -2012 period it is estimated that the <br />water used for dust control for 2013 and 2014 will total 8.8 acre -feet per year. Water used for dust <br />control is considered 100 percent consumptive. <br />Water Used for Drinking and Sanitary Facilities (from well permit nos. 51594 -F and 51593 -F) <br />Based on water meter records for the period of 2009 -2012 period it is estimated that the <br />water used for indoor purposes for 2013 and 2014 will total 286,000 gallons. The consumptive use <br />of water utilized for indoor purposes is estimated at 10 percent resulting in a total consumption of <br />0.09 acre -feet per year. <br />Water Used for Landscape Irrigation (from well permit no. 51593 -F) <br />The consumptive use for landscape irrigation is estimated to be 2.5 acre -feet per year, <br />which is based on the total water used (metered) for landscape irrigation. For purposes of this <br />SWSP landscape irrigation is considered 100 percent consumptive. Landscape irrigation consists <br />of 0.25 acres of lawn irrigated by sprinklers, and approximately 0.75 acres of trees watered by a <br />drip irrigation system. <br />Lagged depletions to the Blue River were determined using the Glover technique based <br />on the Analytical Stream Depletion Model (Schroeder, E.R. 1987, S.E.O. Ground Water <br />Software Publication No. 1). The aquifer characteristics used in the model are based upon data <br />in the USGS Circular No. 11 and they are: transmissivity (T) = 180,000 gallons per day per foot, <br />specific yield (SY) = 0. 18, the distance from the point of depletion to the stream (area- weighted <br />average of the distances from the centroid of each pond) to the stream = 1,482 feet, and the <br />location of the parallel impermeable boundary was estimated to be 2,000 feet from the stream. <br />The attached Tables C -1 and C -2 provide a summary of monthly consumptive uses, for <br />2013 and 2014 respectively. No phreatophyte credit has been applied to this plan. <br />