7378

• UCREFRP Catalog Number: 7378
• Author: Wydoski, R. S.
• Title: Potential Impacts of Alterations in Streamflow and Water Quality on Fish and Macroinvertebrates in the Upper Colorado River Basin.
• USFW Year: 1980.
• USFW - Doc Type: 77-147
• Copyright Material: YES

85

Table 1. Average Monthly Water Temperature (oF) of the Green River Below
Flaming Gorge Dam at Greendale, Utah, Before and After Impoundment

Before impoundment After impoundment
Month 1957-59 1964-65 1966-72 a
January 33 41.0 42.0
February 33 37,5 39.5
March 36 38.5 39,0
April 45 40.5 39.5
May 52 41.5 40,0
June 60 44.0 40.5
July 70 47.0 42.5
August 68 48,5 44,5
September 60 49,5 45.5
October 50 53,5 47.0
November 35 53.0 48.5
December 33 47.5 46.0
Annual average 47.9 45.2 42.9

~: U.S, Department of the Interior, Bureau of Reclamation, Environmental
Assessment of ProDosed Penstock Intake Modifications, Flamin2 Gor2e Dam. Utah (Salt
Lake City, Ut., Bureau of Reclamation, Upper Colorado Region, 1975).

aFrom October 1967 through 1972, the temperature was recorded in degrees
Centigrade and converted to degrees Fahrenheit,