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GRAND JUNCTION <br />LINCOLN DeVORE, Inc. <br />GEGTECFINICAL ENGINEERS - GEOI,GGISTS <br />]441 Motor St. TEL: (970) 242-8968 <br />Grand )unction, CO 81505 FAX: (970) 242-1561 <br />May 4, 2001 <br />Gary Rinderle Construction <br />P.O. Box 1380 <br />Clifton, Colorado 81520 <br />Re: GraveUAggegate Resources, <br />High Desert AFT Subdivision, East Orchard Mesa, Palisade, CO <br />Dear Mr. RindOrle, <br />At the request of Mr. Bob Engleke, the representative of Rinderle Construction, personnel of Grand Junction <br />Lincoln DeVore have conducted on-site geologic mapping of the above referenced site. The purpose of this <br />mapping, in part, was to determine the approximate extent of the general aggregate gravel resources on this <br />site. Following are otu findings. <br />Tract Location and Description: The tract lies in the Southwest Quarter of the Southwest <br />Quarter of Section 17, Township 1 S, Range 2E a,ld a portion of the Southeast Quarter of the Southeast <br />Quarter of Section 18, Township 1 S, Range 2E of the Ute Principal Meridian, Mesa County, Colorado. The <br />tract is partially divided by 35 Road and is bounded on the North by D-1/4 Road, is bounded on the South <br />and East by a tributary of Sink Creek. The D Road extension is slightly south of the tract boundary. The <br />downtown business district of unincorporated Clifton is approximately 2-I/2 miles Northwest of this tract. <br />The tract contains approximately 50.5 acres. <br />The topography of the general area is quite variable, ranging from relatively flat `uplands in the south and <br />east, to moderate to steep slopes along the Sink Creek Gully and associated tributary gullies, to gently rolling <br />slopes in the Noah. Jusi north of the tract, the gently rolling land slopes towazd the north and is irrigated <br />crop land and orchards. The tract is partially an anciel:l terrace of the Colorado River. <br />The tract is in an arid to semi-arid endvonment and erosion is sporadic, oftentimes localized. The tract has <br />an elevation of approximately 4710 to 4920 feet above sea level, using the U.S.G.S. 7-I/2 minute mapping <br />of the Clifton quadrangle. <br />Site Geoloev: Much of the site is covered with unconsolidated alluvial soils, believed to be <br />'h to possibly 40 fee[ thick. A review of Grand Junction Lincoln DeVore's records indicates no exploration <br />borings of our record are within 500 to 1000 feet of this proposed subdivision. A limited gravel survey was <br />conducted on a site across Sink Creek, to the west of this site. <br />As part of this current project, I 1 exploration pits were placed across the north, northwest portion of the <br />tract, Lots 1 - 9. Coarse grained gravel and cobbles of the Ancient Colorado River deposit were encountered <br />in some of the shallow and deeper holes. These coarse grained gravels and cobbles were found to be I to <br />about 20 feet thick. The surface exposures in this area indicate the Mancos Shale is the bedrock. <br />The fine grained surface soils on portions of this site consist of a series of silty clay and clayey silt soils <br />