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<br />
<br />133. Borchert, W.B., 1976, Geohydrology of the Albin and La Grange areas, southeastern Wyoming:
<br />U.s. Geological Survey Water-Resources Investigations 76-118 (Open-File Report), 72 p.
<br />
<br />The Albin and La Grange areas in southeastern Wyoming are two adjoining different
<br />hydrologic areas. Since ground water is the only source of water for irrigation in the
<br />Albin area, 34 irrigation wells have been drilled since 1968 and developed in
<br />conjunction mostly with center-pivot sprinkler systems that in 1974 irrigated about
<br />6,980 acres. Most irrigation wells are developed in channel deposits of the Ogallala
<br />Formation of late Miocene. Water levels in parts of these channel deposits have
<br />declined about 4 to 7 feet since pumping began in 1968. In the La Grange area, lands
<br />are irrigated by surface water, ground water, or a combination of both. The best
<br />producing wells are those completed in both the Brule Formation o( Oligocene age
<br />and the alluvium. Secondary porosity was located and elevated in the Brule using
<br />caliper logs, an acoustic borehole televiewer and geophysical logs. From the spring
<br />of 1970 to the spring of 1974, hydrographs of wells in parts of the La Grange area show
<br />water-level rises of about 5 feet resulting from the net effect of surface-water
<br />recharge and groundwater pumpage. Throughout the La Grange area no significant
<br />annual water- table declines have occurred. It is unlikely that irrigation wells
<br />pumping near Horse Creek have caused significant direct streamflow depletion.
<br />
<br />134. Borgman, L.E., Sever, c., Quimby, W.F., Andrew, M.E., and Karlstrom, K.E., 1981, Uranium
<br />assessment for the Precambrian pebble conglomerates in southeastern Wyoming: Laramie,
<br />Wyo., University of Wyoming, 154 p.
<br />
<br />This volume is a geostatistical resource estimate of uranium and thorium in quartz-
<br />pebble conglomerates, and is a companion to Volume 1: The Geology and Uranium
<br />Potential to Precambrian Conglomerates in the Medicine Bow Mountains and Sierra
<br />Madre of Southeastern Wyoming; and to Volume 2: Drill-Hole Data, Drill- Site
<br />Geology, and Geochemical Data from the Study of Precambrian Uraniferous
<br />Conglomerates of the Medicine Bow Mountains and the Sierra Madre of Southeastern
<br />Wyoming.
<br />
<br />135. Borman, R.G., 1979, Effects of a cattle feedlot on ground-water quality, ill U.S. Geological Survey
<br />Research: U.s. Geological Survey Professional Paper 1150, 120 p.
<br />
<br />136. Borman, R.G., 1981, Effects of a cattle feedlot on ground-water quality in the South Platte River
<br />Valley near Greeley, Colorado: u.s. Geological Survey Water-Resources Investigation 80- 83,
<br />85 p.
<br />
<br />Ground-water quality may be changed by leachate from feedlots because large
<br />quantities of wastes are generated. The potential for water quality to be affected is
<br />especially high in alluvial aquifers with a shallow depth to water. However,
<br />monitoring water quality in 19 observation wells in and near a feedlot stocked with
<br />90,000 head of beef cattle from April 1974, before the lot was stocked, to June 1978, has
<br />shown little change in ground-water quality that can be attributed to the feedlot.
<br />Analyses of water from two lysimeters in the unsaturated zone indicate leachate from
<br />the feedlot has percolated to a depth of a least 5 feet but not to a depth of 20 feet. The
<br />small changes in ground-water quality caused by the feedlot are likely due to the
<br />limited available recharge, a relatively impermeable manure pack and soil clogging
<br />under the cattle pens resulting in slow vertical movement of leachate through the
<br />
<br />28 Bibliography of Water-Related Studies, South Platte River Basln--Colorado, Nebraska, and Wyoming
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