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,. <br /> <br />July 11, 2003 <br />Pioneer Sand Company, Inc. <br />Colorado Division <br />7608 Highway 93 <br />Golden, CO 80401 <br />Attn: Mr. Wayne Brantley, Manager <br />1 ~~rr~con <br />301 N. Howes • P.O. Boz 503 <br />Fort Collins, Colorado 60521-0503 <br />(970) 484-0359 Faz: (970) 484-0454 <br />Re: Mining Evaluation <br />Ingleside Quarry Highway 287, Larimer County, Colorado <br />Terracon Project No. 20035106 <br />Dear Mr. Brantley: <br />~~ <br />P~,,f~ If FO <br />P~ <br />~C <br />Poi <br />P~ <br />Terracon is pleased to present a report of a mining evaluation for the expansion of the <br />existing Ingleside Quany. The study area, comprising approximately 66 acres, is located <br />west of U.S Highway 287, five miles north of Colorado Highway 14 in northeast Larimer <br />County. More particularly the site is described as a 66-acre tract of land situated in the <br />east half of Section 24, Township 9 North, Range 70 West of the 6th Prime Meridian. <br />A Senior Engineering Geologist and Senior Geotechnical Engineer of Terracon and Mr. <br />Wayne Brantley of the Pioneer Sand Company made a visual observation of the site on <br />June 19, 2003. Additional observations were made at the site by the senior engineering <br />geologist on June 23, 2003. The area studied consists of the existing Ingleside quarry <br />which is located on a north south trending ridge. The existing quarry is located at the north <br />edge of the property approximately 300 feet east of the top of the ridge and the west <br />property line. The existing quarry has been excavated along the dip slope of the bedrock <br />and has an approximate 30-foot headwall. The quarry is approximately 800 feet long and <br />85 feet wide along the dip slope. The flat pit floor east of the slope is approximately 200 <br />feet wide. Large stockpiles of sorted and crushed rock are stored in this area. The material <br />ranges from sand to large rip rap. An access road is located along the east edge of the <br />property and quarry. A scale house and scale-are located near the southeast comer of the <br />site and an existing gravel road though a break in the ridge forms the south property line. <br />Historically, previous small mining operations have disturbed the natural slope beyond the <br />limits of the current quarry. Bedrock fragments varying in size from a few inches to <br />several feet along with small excavations are scattered over much of the site. The <br />undisturbed slope is vegetated with native grasses, wild flowers, shnabs and scattered <br />pine. Surtace bedrock outcrops are located throughout the area and the bedrock outcrops <br />all along the top of the ridge. Maximum relief of the site is approximately 250 feet from the <br />top of the ridge on the west to the access road on the east. <br />The proposed quarry expansion is located in the Front Range of the Southern Rocky <br />Mountain physiographic providence. The Front Range is a major, upthrust, mountain belt <br />Arizona ~ Arkansas ~ Colorado ~ Idaho ~ Illinois ~ Iowa ~ Kansas ~ Minnesota ~ Missoud ~ Montana <br />Nebraska ~ Nevada ~ New Mexico ~ North Dakota ~ Oklahoma ~ Tennessee ~ Texas ~ Utah ~ Wisconsin ~ Wyoming <br />~ualiry Engineering Since 1965 <br />