WSP03809

• File Number: 8027
• Description: Section D General Correspondence - Federal Agencies - BOR - Upper Colorado Region - Salt Lake City
• State: CO
• Basin: Statewide
• Date: 1/9/1976
• Author: DOI-BOR-USGS
• Title: Press Releases 1976
• Water Supply Pro - Doc Type: News Article/Press Release

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October 15, 1976
Page 2

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The principal bedrock aquifer, the Dawson Formation which underlies about
850 square miles in northern El Paso' County, contains a~ estimated 38 million
acre-feet of water in the upper 500 feet of saturated thickness. Alluvial
deposits, widespread throughout El Paso County, are important sources of water
supply. The dissolved-solids concentration of ground water from the Dawson
aquifer in most areas of the county is less than 500 milligrams per liter.
Water from the Dawson aquifer is suitable for most uses although, in small
areas, fluoride and iron concentrations occur in objectionable quantities.
The principal alluvial aquifers are in Fountain Creek, Jimmy Camp Creek, and
upper Black Squirrel Creek basin. The Fountain Creek and Jimmy Camp Creek
alluvial aquifers contain an estimated 100,000 acre-feet of water in storage.
In the upper Black Squirrel Creek basin, the alluvial aquifers contain an
estimated 350,000 acre-feet of water in storage.

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About 95 percent of El Paso County is drained by tributaries to the
Arkansas River. Major streams in the county are Monument Creek and Fountain
Creek. The water quality of streams in El Paso County is highly variable .with
dissolved-solids concentrations ranging from less than 100 milligrams per
liter in the small mountain streams to greater than 1,000 milligrams per liter
in Jimmy Camp Creek. Selected streams draining Pikes Peak and the Rampart
Range occassionaly contain concentrations of fluoride greater than the
U.S. Public Health standards for drinking water.

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The report, published as Colorado Water Resources Circular No. 32,
may be obtained from the Office of the Director, Colorado Water Conservation
Board, 1313 Sherman Street, Denver, Colo. 80203.

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