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(Page 3) <br />n <br />MINE ID f OR PROSPECTING ID ~ M-77-081 <br />INSPECTION DATE 5 13 94 INSPECTOR'S INITIALS GSC <br />Regional Hydrology <br />According to the Division of Water Resources, recent data indicates that the Greeley area is <br />in a drought period. Water level drops of a few feet have been attributed to this drought. <br />This may partially explain the static water level drop in Mr. Andrews' wells. <br />Piadiags <br />1. Mr. Andrews has experienced a water level drop in the last year in two wells located about <br />1500 feet southeast of the Greeley west Pit. Mr. Andrews believes the water level has <br />dropped about 8 feet. The current level was measured at about 17 feet bgl. The current <br />water level in the Greeley West dewatering pit is about 25 feet bgl. <br />2. A drop of 4 to 5 feet has apparently occurred during the past year in a water filled pit <br />located about 500 feet north of the Andrews wells. <br />3. There is apparently no mitigation agreement between Western Mobile and Mr. Andrews for <br />damage to hie wells. <br />4. The Andrews wells are located approximately 1800 feet from the Greeley west Pit and 2300 <br />feet from the pump location. These distances are greater than the 600 foot radius generally <br />used in identifying wells which can potentially be impacted. <br />5. The water level measurements completed during the <br />aquifer has not been depleted in Mr. Andrews' deep <br />experiences production drop may be a function of the <br />not enough information to determine why this occur <br />completion data to the Division before the source <br />Necessary information includes the drillers report <br />report e, the depth at which the submersible pump i <br />developed. <br />inspection verified that the alluvial <br />well. The fact that the deeper well <br />well itself. At this point, there ie <br />i. Mr. Andrews will need to provide <br />of this problem can be determined. <br />and lithologic logs, well completion <br />i set, and how and when the well was <br />6. There ie insufficient data at this time to determine the cause for the water level drop <br />in Mr. Andrews' water wells. The cause might be attributed to a regional drought, dewatering <br />activities in the gravel operation, a combination of the two, or an unrelated phenomenon. <br />The operator needs to submit to the Division a plan for verifying if dewatering activities <br />have impacted Mr. Andrews.' wells or some documentation demonstrating that the operation has <br />not impacted the wells. This should be received by the Division no later than 7/8/94. <br />Due to the lack of site specific monitoring information, the operator should determine if any <br />local monitoring data exists which might establish a relationship between Mr. Andrew' wells, <br />the dewatering activities and to the effects of the local drought on wells in the vicinity. <br />Information can be obtained from the following agencies: The Central Colorado water <br />Conservancy District, Northern Colorado Water Conservancy District, Lakewood Branch of the <br />USGS, Water Resources Division and the Northern Front Range Water Quality Planning <br />Association. The results should be included with the dewatering impact plan due on 7/8/94. <br />I & E Contact Address cc: Carl Mount - DMG <br />Elmer Andrews <br />Shawn Hoff - OSE <br />~ CE <br />NAME Greg Lindsay ~ gL <br />OPERATOR Western Mobile ~ FS <br />STREET 1800 N. Taft Hill Rd.. P.O. Box 2187 ~ HW <br />CITY/STATE/2IP Ft. Collins. Co 80522 ~ HMWMD (CH) <br />[~ SE <br />~ WQCD (CH) <br />~ OTHER <br />