9413

• UCREFRP Catalog Number: 9413
• Author: Osmundson, D. B.
• Title: Flow Regimes for Restoration and Maintenance of Sufficient Habitat to Recover Endangered Razorback Sucker and Colorado Pikeminnow in the Upper Colorado River.
• USFW Year: 2001.
• USFW - Doc Type: Grand Junction.
• Copyright Material: NO

LIST OF TABLES
1. Mean monthly discharge (cfs) in the upper Colorado River at Cameo
under unregulated (predicted) and regulated (actual) scenarios for
four types of water year (dry, below average, above average, wet),
based on 1958-1997 records ......................................... 34
2. Mean percent difference between unregulated (predicted) and regulated
(actual) average monthly flows in the upper Colorado River at Cameo
for four types of water year (dry, below average, above average, wet),
based on 1958-1997 records ......................................... 34
3. Frequency of occurrence (percent of years) and mean interval between (years)
bankfull events (annual discharge reaching or exceeding 22,000 cfs or in the
De Beque-to-Rifle reach). ........................................... 38
4. Objectives by season, species, life-stage and targeted reach ................. 42
5. Recommendations for mean monthly flows (cubic ft/sec) in the upper Colorado
river as measured at the USGS gauge near Cameo . ........................ 51
6. Mean monthly flows at the USGS gauge near Cameo required to provide
or exceed recommended flows in the GVDD-to-Rifle reach, provide
recommended flows in the 15-mile reach and provide minimum flows in
the GVICDD-to-GVDD reach while allowing local diversion canals to
continue current operations .......................................... 51
Appendix Tables
1. Seasonal frequency of use of mesohabitats by radio-tagged adult
Colorado pikeminnow in the Grand Valley, 1986-1989 ..................... 61
II. Seasonal frequency of use of mesohabitats by radio-tagged razorback
sucker in the Grand Valley, 1986-1989 ................................. 62
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