6012

• UCREFRP Catalog Number: 6012
• Author: Miller, W. H., D. L. Archer, H. M. Tyus and K. C. Harper.
• Title: Colorado River Fishery Project
• USFW Year: 1982.
• USFW - Doc Type: Final Report.
• Copyright Material: NO

Table 2. Flow and temperature recommendations for critical life stages of Colorado squawfieh
and humphack chub, Colorncto and Green Rivera.
;, Recommendations
Fish Species and Flow
Life Stage Critical Area Time Period (cfs) Temperature
Colorado Squawfish
Spawning Colorado River
Loma-Utah .Line June 15-Aug 15 5,000-10,000 20-22°C option
(RM 132-154) 28°C maximum
Green River
Gray Canyon June 15-Aug 15 5,000-6,000 20-22°C option
(RM 132-157) 28°C maximum
Split Mountain
(near Jensen) June 15-Aug 15 4,500-5,500
(RM 199-207)
YOY Rearing Colorado River
Potash-Cataract
Canyon (RM 3-47) July 15-Oct 15 7,000-10,000 20-28°C
Green River
Jensen-Sand Wash July 15-Oct 15 2,000-4,000 ~ 20-28°C
(RM 212-290) '
San Rafael to .
Colorado River July 15-Oct 15 2,000-4,000 20-28°C
(RM 0-97)
Humpback Chub
Spawning Colorado River
Black Rocks May 1-June30 3,000** 16-18°C
(RM 135-137)
Westwater Canyon May 1-June 30 3,000 16-18°C
(RM 116-124) .. .. .. .
**Based on average monthly flows
To maintain the key temperature flows may need to be greater (Prewitt estimated 7,000-13,500 need
for temperature of 13-15°C in May at Black Rocks
.'