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Mc Jeff Keller February 28, 2006 Page 2 wells have perforations in the Laramie-Fox Hills but aze cemented from the top of the aquifer all the. way to ground surface. Finally, the static water level in the Wilcox and Hawthorne wells is reported as 315-feet and 540-feet, respectively. The Reed well pernut file is somewhat confusing in that there appears to have been an original intent to drill the well to a shallow depth but correspondence in the pemut states that no water was encountered down to at least 60-feet (some 50-feet, at least, below the gravels in the Phase I azea). in response, there was a request made to the State to allow drilling down to 800-feet and into the Lazamie-Fox Hills, which request was granted. The permit file records following this. approval instead indicate that the well was completed to a depth of 170-feet. This would likely place the completion in the upper Arapahoe formation in contradiction to the permit approval conditions. The static water level is reported as 28-feet. The data from all three of these wells cleazly prove that the wells aze producing from bedrock aquifers that aze not and cannot be in hydraulic connection with the minimally saturated gravels that will be dewatered and mined at the proposed Phase I pit. With respect to the Wilcox and Hawthorne wells in particular, there is some 600-feet plus of other bedrock materials sepazating the producing zones of the wells from the gravels. The static water level data indicates a sepazation of between 315- and 540-feet between the water level in the producing aquifer and the water level in the saturated gravels. With such separation there can be no connection hydraulically. Further, we note that the nontributary designation for the bedrock aquifers means, by definition, that there is no connection between the aquifer and the surface stream-alluvial systems. The Kranz well appeazs, as noted above, to be an unregistered well and there is thus no completion data available. However, it is our opinion that the well has to be producing from one of the bedrock aquifers, as is the case with the other three wells. The alluvial aquifer that is comprised of the saturated gravels pinches out just west of the Phase I area and it is seen by the test boring data that there is little to no saturation at the west edge of the proposed Phase I area that would be able to reliably support pumping by a well. It is thus our conclusion that the wells supplying the homes to the west of County Road 23 are not hydraulically connected to the saturated gravels and cannot be impacted by the dewatering operations that will occur at the Phase I mine. Please let us know if you have any questions concerning this letter or our investigations into the neighboring wells. -~a~riiir ~~ Vice President cc: Mr. Paul Banks Martin and Wood Water Consultants, Inc.