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• NE 1/4, NE 1/4, SE 7/4, Sec. 1 10.2 <br /> Part of E 1/2, NW 1/4, Sec.l 51.8 <br /> Total Survey Area - 607.2 <br /> Review of Existing Information. All existing soils and related discipline information for <br /> the Nucla East study area was compiled, reviewed, and evaluated prior to initiation of <br /> field work. An Order 3 soil survey was recently completed by SCS for the 'San Miguel <br /> Area" (SCS Colorado Soil Survey Area e8675) and publication is planned. The document is <br /> available for review at the SCS State Office in Denver, and at the Montrose County <br /> District Conservation Office in Norwood, Colorado. A copy of the SCS map covering the <br /> study area, official soil series descriptions, "Form 5" soil interpretation records, map <br /> unit descriptions, and all available soil laboratory data, were obtained and reviewed. <br /> Field Mapping (Order 1). The study area was first examined in a reconnaissance manner to <br /> familiarize the field soil scientist with the area. Following the Im intensity <br /> orientation survey, a high intensity soil survey at 111:400' scale was conducted over the <br /> • entire study area (approximately 607 acres). <br /> Soil profiles were excavated as necessary to determine the nature and extent of soils <br /> present on the study area. Pits were hand-dug to depths of about 25 inches. In general, <br /> this was sufficient to expose the genetic horizons and some of the substrata. Below the <br /> 25 inch depth, the soils were examined by means of a three-inch diameter hand auger to 72 <br /> inches or to a paralithie contact or bedrock, whichever was shallower. Each soil profile <br /> was characterized and then correlated with available SCS soil series criteria. Mr. Gib <br /> Bowman, SCS Soil Specialist for Correlation in Denver, was contacted several times for <br /> specific Information and discussion. <br /> Soil series phases were delineated primarily on the basis of surface texture and slope. <br /> Small areas (less than two acres in size) of steeper or flatter slopes or slightly <br /> different surface textures were not broken out into separate phases. After determining <br /> the soil series, and the surface phase to which each profile belonged, the soil phase <br /> boundaries were determined throughout their length in the field, primarily by means of <br /> additional soil characterization auger holes and secondarily by analysis of relative <br /> landscape position, parent materials, and vegetative indicators. The soil boundaries were <br /> . then delineated on the 111:400' scale black and white aerial photo base map (4-18-86). <br /> 9-5-9 Revised 04/11/8B <br />