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• III IIIIIIIIIIIII III` • 999 1 t `~; - ~ GRAND JUNCTION `'~ ;J LINCOLN DeVORE, Inc. GEOTECHMCAL ENGINEERS -GEOLOGISTS 1441 Motor Street Grand Junction, CO. 81505 April 5, 2001 Grand Junction Pipe P.O. Box 1849 Grand Junctioq Colorado 81502 r Re: Surficial Geology Investigation ' Proposed South Fruits Gravel Pit Extension Fruits, Colorado Tel: (970) 242-8968 Fax: (970) 242-1561 gjldem(a~gj.net At the request of Mr. Ed Settle, PE of Grand Junction Pipe, personnel from this office have completed a ground reconnaissance of the above referenced site on 3-15-2001, in order to determine the general geologic conditions and ' constraints relating to the development of a Gravel Pit on the site. This study was performed in a manner so as to be in general compliance with the requirements of C.R.S. 30-28-101 (Senate Bill 35). Following are our findings. ' TRACT LOCATION & DESCRIPTION The tract lies within the South Half of Section 20, Township 1 North, Range 2 West of the Ute Principal Meridian, Mesa County, Colorado. The tract is bounded on the north by I-I/2 Road, on the east by the 17-3/4 Road Alignment and on the southwest by the Colorado River. The west end of the tract is within 250 feet of State Highway 340 (17 Road). t The topography of the tract is relatively flat, with a general slope to the south. The topography in the immediate vicinity of the Colorado River north bank is somewhat brokeq due to typical river floodplain features associated with a reasonably `controlled' river flow. Remnants ofineander scrolls, natural levees and overbank deposits are evident on the existing ground surface, within 300 feet of the existing bank. The site elevation was found to be approximately 4580 feet above sea level, using the U.S.G.S. 7-1/2 minute mapping of the Fruits quadrangle. ' The tract has been used for agriculture purposes, with an exhausted gravel pit being located th the southeast comer of the site. A number of working and exhausted gravel pits are present along this `reach' of the Colorado River. The northern portion of the tract has been subject to irrigation and is drained toward old, shallow drain ditches, eventually discharging ' in the Colorado River. Surface drainage is fair to poor and the subsurface drainage is fair to good. GENERAL GEOLOGY General information concerning the area geology is contained in: 1 1. CASHION, W.B., 1973, Geologic and Stmcture Map of the Grand ]unction Quadrangle, Colorado and Utah, U.S.G.S. Misc. Geol. Invest, Map [-736. ' 2. WILLIAMS, P.L., 1964, Geology, Structure and Uranium Deposits ofthe Moab Quadrangle, Colorado and Utah, U.S.G. S. Mis. Geol. Invest, Map 1-360, 2 p.