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ti <br />4> 1iQ <br />1 <br />May 5, 2008 <br />EARTH ENGINEERING <br />CONSULTANTS, INC. <br />Asphalt Specialties Company <br />10100 Dallas Street <br />Henderson, Colorado 80640 <br />Attn: Mr. Rob Laird, Land Manager <br />Re: Subsurface Exploration Report - Feasibility Study <br />Proposed Turnpike Water Storage Reservoir <br />Highway 52 and Weld County Road 1 <br />Weld County, Colorado <br />EEC Project No. 1082030 <br />Mr. Laird: <br />Enclosed, herewith, are the results of the geotechnical subsurface exploration/feasibility <br />study, completed by Earth Engineering Consultants, Inc. (EEC) personnel for the <br />referenced project. For this study, in conjunction with previous explorations performed <br />by others on the property, a total of ten (10) supplemental test borings were drilled at <br />selected locations within the proposed reservoir configuration. The supplemental borings <br />were positioned at locations accessible to our drilling equipment and were extended to <br />depths of approximately 35 to 40-feet below existing site grades. Also as part of this <br />feasibility study, four (4) packer tests were conducted in selected locations to evaluate the <br />in-situ permeability characteristics of the underlying bedrock formation. This study was <br />completed in general accordance with our proposal dated March 11, 2008. <br />The Turnpike Reservoir property is located northeast of the intersection of County Line <br />Road/Weld County Road 1 and Highway 52 in Erie, Weld County, Colorado. More <br />particularly the site is located within Section 31 and the South %2 of Section 30, Township <br />2 North, Range 68 West of 6th PM. The majority of the site, approximately 32-acres, <br />previously was active in mining operations, which extracted sand and gravel deposits <br />encountered above the bedrock formation. A reclaimed, unlined lake currently occupies <br />the northern portion of the site. Currently, Asphalt Specialties Company, Inc. (ASCI) <br />mines portions of the site. We understand. the Town of Erie is planning on constructing <br />an approximate 800 to 1,000 acre-foot water storage reservoir on the property. The <br />purpose of our evaluation was to assess the geotechnical feasibility considerations for <br />4396 GREENFIELD DRIVE <br />WINDSOR, COLORADO 80550 <br />(970) 545-3908 FAX (970) 663-0282 <br />