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to 2S (horizontal) : I (vertical) and the fill slope co~gurations for the proposed earthen dam, to be • <br />coasvucted for Pond 010, will be 3.0 (horizontal) to 1(ver[ical). <br />SITE CONDITIONS <br />The project site is located approximately LO miles south of Hayden, Colorado and is generally situated <br />from I to 1 I/2 miles west of Rout[ County Road #27 in Sections 28, 29 and 32, Township 6 North, <br />Range 87 Wes[, and in Sections 5, S and 17, Township 5 North, Range 87 West of the 6th P.M. in Rout <br />County, Colorado. <br />in general, the project site consisted of vacant land. The topography and vegetation conditions of the <br />project site vary considerably, but can be divided into two general areas. The northernmost 3 miles of <br />the haul road alignment from the proposed intersection with County Road 27 crosses gently sloping to <br />moderately steep natural slopes which aze intersected by several intermittent drainages, The land has <br />generally been in use for agricultural purposes of livestock grazing and non-irrigated farming and was <br />generally vegetated either with planted grain or natural grasses, weeds and sagebrush. The southern <br />portion of [he haul road and [he proposed pond site are located within steep to near vertical sided <br />canyons with occasional massive sandstone bedrock outaops. The area is intersected by a number of <br />two track, unimproved dirt roads. The road aligtunent follows an intermittent sveam course south <br />before switch-backing up the very steep canyon walls to the east and south. The area is generally well <br />vegetated with natural grasses, weeds and scrub oak brush. We did not observe areas of recent slope <br />instability within either portions of the project site at the time of this investigation, however, occasional • <br />rockfall activity is probable within the southern portion of the site, west of the haul road <br />FIELD INVESTIGATION <br />The field investigations for this project were conducted from October 13 - 15, 1993 and oa April 18, <br />1994. Twenty live (25) test holes were drilled, a[ the approximate grid locations shown on the logs, [o <br />explore the subsurface conditions. Test hole 1 was not drilled due to access problems. The locations <br />and elevations of the test holes were determined by an instrument survey completed by our client. The <br />test holes are shown on the Haulage Road Plan and Profile sheets, Exhibits 13-10 and 13-11. <br />The test holes were advanced through the overburden soils and bedrock with a vack-mounted CME 45 <br />drill rig utilizing 4-inch diameter continuous flight power augers. The test holes were logged by a <br />representative of Northwest Colorado Consultants, lnc. <br />Samples of the subsurface materials were taken with a 2-inch [.D. spoon sampler. The sampler was <br />driven into the various strata with a 140-pound hammer falling 30 inches. This test is similar to the <br />standard penevation test described by ASTM Method D-1586. Penevation values, when properly <br />evaluated, indicate the relative density or consistency of the soils and bedrock. Large disturbed bulk <br />samples were also obtained from the auger cuttings. Depths at which the samples were taken are <br />shown on the Logs of [he Exploratory Test Holes, Figures #1 thru #5 and #8 thru #9. The Legend <br />and Notes assodated with test hole 2 thru 20 are shown in Figures #6 and #7, and the Legend and <br />Notes assoaated with test holes 21 to 26 are shown in Figure #10. <br />2 <br />