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Martin and Wood Water Consultants, Inc. ' 602 Park Point Drive, Suite 275, Golden, CO 80401 Phone: (303) 526-2600 . Fax: (303) 526-2624 www. martinandwood.com Febmary 28, 2006 Mr. Jeff Keller Asphalt Paving Company 14802 W. 44"' Avenue Golden, Colorado 80401 Re: Wattenberg Pit Neighbor Well Analysis Project Number 625.1 Dear Jeff: As requested, we have conducted a review of the permits for the domestic supply wells located immediately west of the proposed Asphalt Paving Company Wattenberg Pit located west of the Town of Wattenberg in Weld County, Colorado. We understand that this review was in response to concerns expressed by the neighbors that the proposed gravel pit operations may impact their wells and thus their water supply. The primary concern that we understand has been raised centers on the proposed Phase I mining at the Wattenberg Pit which, unlike the other mine phases, will be dewatered and dry mined. The Phase I area is at the far southwest comer of the overall proposed mine azea and overlies a very thin section of gravels. The monitor hole data from this azea indicate that there is minimal water in the gravels, with only some four to five feet of saturation, and that even this minmal saturation decreases more to the west. Further, the borings logs for the test holes drilled at the site by Ground Engineering Consultants in late 2000 clearly indicate that the gravel deposit thins rapidly as one moves east to west across the Phase I azea. The thin gravel deposits aze underlain by claystone bedrock. There are three permitted and existing wells to the west of the proposed Wattenberg Pit and west of County Road 23. These are registered, as per our review of the permits, to the following persons: permit number 115376 Wilcox permit number 159677 Hawthorne permit number 73231 Reed We understand that a fourth well, belonging to a family named Kranz, also exists immediately west of the Phase I azea, but we found no records on this well and assume that it is currently an unregistered stmcture. Our review of the permit files for the three registered wells has revealed that the Wilcox and Hawthorne wells are completed into the nontributary Laramie-Fox Hills aquifer. This aquifer lies at a depth of approximately 620- to 890-feet from ground surface in this azea as per determinations by the Colorado Division of Water Resources. The Wilcox well is 720-feet in depth and the Hawthorne well is 800-feet in depth. The permits indicate that both the Wilcox and Hawthorne