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Acord Well Inspection Record <br />Weld County, Colorado <br />Page 2 <br />well we inspected was not the well that was permitted by the Colorado Division of Water Resources. <br />He indicated that the permitted well was located approximately 100 feet further to the east. A copy <br />of the well permit is provided in Attachment B. A review of the well record indicates that the depth <br />to water at the time of the well completion (1968) was 9 feet below grade. Based on visual <br />observation the ground elevations of the two well locations were approximately equal. The depth to <br />water at the time of the well inspection was approximately 10.6 feet below grade. <br />The water level measured at the time of the inspection was just slightly lower than when the well <br />was drilled — well within the expected seasonal water table level fluctuation of approximately 3 feet. <br />The Last Chance Ditch, which is unlined, lies between the mine and well and was flowing at the time <br />of the inspection. The vertical permeability of the soils associated with the ditch is sufficient to allow <br />seepage to a point where it creates a hydraulic barrier to mine dewatering influences. This opinion is <br />supported by numerical modeling results reported to DRMS in 2009. Based on the duration of mine <br />dewatering (reported as 1 year) the calculated drawdown in the vicinity of the well should be on the <br />order of seven feet or more without the influence of ditch recharge. The fact that the measured <br />water level was nearly equal to when the well was drilled indicates that the recharge from the ditch <br />creates a protective hydraulic barrier. It is also the author's opinion that the water column in the <br />well (approximately 1.7 feet) is insufficient for required domestic well yields. <br />The well owner indicated that a permit for new replacement well was in process and that the new <br />well would be approximately 60 feet deep. Based on the soil profile the well will likely fully <br />penetrate the surficial aquifer and will have a water column that will allow for continuous pumping <br />under any circumstance. <br />If you have any questions regarding this letter or attachments, please contact me at 970 -590 -3807. <br />Sincerely, <br />AWES, LLC <br />Joby L. Adams, P.G. <br />Principal /Hyd rogeologist <br />�w�s 4809 Four Star Court, Fort Collins, CO 80524 970 -590 -3807 <br />