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WSP06497
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Last modified
1/26/2010 2:23:02 PM
Creation date
10/12/2006 1:40:42 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8270.100
Description
Colorado River Basin Water Quality/Salinity -- Misc Water Quality
Basin
Colorado Mainstem
Water Division
5
Date
1/1/1974
Author
USDOI
Title
Colorado River Water Quality Improvement Program - Status Report
Water Supply Pro - Doc Type
Report/Study
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<br />COLORADO RIVER INDIAN RESERVATION <br />UNIT ARIZONA-CALIFORNIA <br /> <br />The Colorado River Indian Reservation is located on <br />both sides of the Colorado River on the <br />Arizona-California border downstream from Parker <br />Dam. There are about 60,600 acres irrigated at the <br />present time and this is projected to increase to 93,000 <br />acres by 1980. These lands are estimated to contribute <br />30,000 tons of salt annually to the Colorado River. It <br />is anticipated that this salt load could be reduced by <br />7,000 tons through the irrigation management services <br />and the water systems improvement programs which <br />would result in a salt concentration reduction of about <br />1 mg/l at I mperial Dam. <br /> <br />UINTA BASIN UNIT, UTAH <br /> <br />There are about 170,000 irrigated acres in the Uinta <br />Basin of northwestern Utah. The area contributes <br />about 450,000 tons of salt to the Colorado River <br />system each year. It is estimated that the combined <br />irrigation management services and water systems <br />improvement programs wou Id reduce the salt <br />contribution by 100,000 tons per year with a salinity <br />reduction of about 9 mg/I at Imperial Dam. The <br />investigation program is scheduled for completion in <br />fiscal year 1978. <br /> <br />LOWER GUNNISON BASIN UNIT, COLORADO <br /> <br />The lower Gunnison basin in west-central Colorado <br />contributes about 1,100,000 tons of dissolved solids <br />annually. There are about 160,000 irrigated acres in <br />the subbasin. Investigations concerning water systems <br />improvement will be initiated in conjunction with the <br />irrigation management services program in 1974. Some <br />investigations have been conducted and will continue <br />to determine needed improvements on the <br />Uncompahgre Project, a major development in the <br />area. <br /> <br />LITTLEFIELD SPRINGS UNIT, ARIZONA <br /> <br />The Littlefield Springs discharge along the south side <br />of the Virgin River about a mile upstream from <br />Littlefield, Arizona. These springs have a combined <br />outflow of about 6 cfs and contribute about 17,000 <br />tons of dissolved solids to the river system annually. <br />Feasibility investigations started in 1973 and are <br />scheduled to be completed in FY 1976. <br /> <br />GLENWOOD-DOTSERO SPRINGS UNIT <br />COLORADO <br /> <br />The Glenwood-Dotsero group of springs discharge to <br />the Colorado River at opposite ends of Glenwood <br />Canyon in Colorado. These springs are estimated to <br />contribute 25,000 acre-feet of water and 500,000 tons <br />of salt to the river annually. The removal of 200,000 <br />tons of salt each year would result in the salinity <br />concentration at Imperial Dam being reduced by about <br />19 mg/1. <br /> <br />. <br /> <br />Investigation was initiated in April 1972 by locating <br />and identifying 18 separate springs and subsequently <br />measuring the flow and analyzing the quality of them <br />monthly. Several alternatives have been considered to <br />treat or dispose of this highly saline water including <br />deep well injection, plugging springs, evaporative <br />ponds, and several methods of treatment including <br />desalting. <br /> <br />BLUE SPRINGS UNIT, ARIZONA <br /> <br />These springs rise in the little Colorado River about 13 <br />miles upstream from its confluence with the Colorado <br />River. The springs are the largest point source of <br />salinity in the entire system with an output of 220 cfs <br />and 550,000 tons of salt per year. <br /> <br />In ves tigations of a control program are not <br />encouraging. The little Colorado River is entrenched <br />within a steep canyon at a depth of 2,500 feet at this <br />point. The comparatively large flow, the scenic setting, <br />and the special ethnic value to the local Indians are <br />additional complicating factors. Consequently these <br />considerations have led to the termination of <br />investigations. <br /> <br />BIG SANDY RIVER UNIT, WYOMING <br /> <br />The Big Sandy River contributes approximately <br />180,000 tons of dissolved solids annually to the Green <br />River in Wyoming. Most of this salt enters the Big <br />Sandy from numerous seeps in a reach of the river <br />from Simpson Guld1 to Gasson Bridge. It is estimated <br />that about 80,000 tons could be removed by treatment <br />of the more saline flows. <br /> <br />Because of the low winter temperatures, it may be <br />possible to apply natural freezing methods to treat the <br />water. A pilot demonstration of this method in the <br />vicinity of Gasson Bridge is underway through <br /> <br />10 <br />
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