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Dolores River Basin water quality study;

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Title	Dolores River Basin water quality study;
Description	The Bureau of Reclamation began collecting samples from a variety of sites in the Dolores River basin of Colorado in 1989. Sampling began after elevated mercury levels observed in fish in Reclamation's McPhee Reservoir prompted the Colorado Department of Health to post warnings against the consumption of large amounts of fish from the reservoir. The purpose of the sampling of water and sediment was to identify the source of the mercury. The results of the sampling effort are to be reported here. Samples were first collected for the Dolores River Mercury Study in September 1989. Both water and sediment samples were collected. Water samples were analyzed by Casa del Sol Laboratories in Durango, Colorado. The sediment samples and two splits of the water samples were analyzed by the USGS Geochemistry Laboratory in Denver. Subsequently only water samples were collected. Field determinations included discharge, water temperature, electrical conductivity, and hydrogen-ion concentration (pH). Samples were analyzed for total dissolved solids (TDS), major cations, and anions and a variety of heavy metals and other trace elements. In addition to mercury, analytes (potential contaminants) included: Silver, aluminum, arsenic, boron, barium, beryllium, cadmium, chromium, copper, iron, manganese, nickel, lead, selenium, thallium, vanadium and zinc. On occasion, water sample analyses also included cobalt, lithium, silicon, tin, and uranium Sediment samples were analyzed for major cations and the trace elements above.;
Subject	Dolores Project (U.S.) -- Environmental aspects Water quality -- Colorado Water quality -- Utah Water -- Pollution -- Colorado -- Dolores River Dolores River (Colo.)
Creator	United States. Bureau of Reclamation
Publisher	Published by U.S. Bureau of Reclamation;
Original Date	1992;
Geographic Locations	Utah Colorado Dolores River Basin (Colo. and Utah)
Time Periods	1980-1989 1990-1998
Language	eng
Source	Original borrowed from the U.S. Bureau of Reclamation Denver Library and scanned by Utah State University Merrill-Cazier Library for inclusion in this digital collection; Published: U.S. Bureau of Reclamation, [1992];
Rights	This is a U.S. Government publication and as such may be used without restriction
Digital collection	Utah's Most Elusive - Hard-to-Find Government and Scientific Reports
Digital Publisher	Digitized by Utah State University Merrill-Cazier Library;
Date Digital	2011
Material Type	Government documents Reports Electronic books
Type	Text
Format	image/jpeg text/pdf
Conversion Specifications	Scanned by Utah State University Merrill-Cazier Library using Epson Expression 10000 scanner, 24-bit RGB, at 400 dpi. Archival file is uncompressed TIFF (400 dpi); display file is JPEG2000.
Identifier	doloresriver
Search Date	1992
Online Catalog Record	sky244980688

Title	Front Cover
Transcript	DOLORES RIVER BASIN WATER QUALITY STUDY Prepared by United States Department of the Interior Bureau of Reclamation Technical Service Center Denver, Colorado 424 and • C6 Durango Projects Office D65 Durango, Colorado W38 1992 TC

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