7848

• UCREFRP Catalog Number: 7848
• Author: Burdick, B. D.
• Title: Minimum Flow Recommendation For Passage Of Colorado Squawfish And Razorback Sucker In The 2.3-Mile Reach Of The Lower Gunnison River
• USFW Year: 1997.
• USFW - Doc Type: Redlands Diversion Dam To The Colorado River Confluence.
• Copyright Material: NO

Table D.1. (cont'd). Daily summary data for captures and positive sightings of
Colorado squawfish with electrofishing in the Gunnison
River in the Redlands Diversion Dam plunge pool (river
mile [RM] 3.0) and in the 2.3-mile reach immediately
downstream of the Redlands Diversion Dam plunge pool to
the Colorado River confluence. Note: CS=Colorado
squawfish; cfs=cubic feet per second; NR=effort not
recorded: catch effort is total effort (total fish divided
by total effort).
--------------------------------------------------------------------------------
Flow (cfs)
CS Caught below
Shocking No. of Catch Redlands
RM Effort CS effort Diversion Dam
Date Sampled hrs Sighted No. TL(mm) Wt(g) fish/hr U.S.G.S. BRa
1993 (cont'd)
93/05/07 3.0 0.19 0 0 --- --- 0.00 6,220
93/05/10 2.9-0.7 0.55 1 0 --- --- 0.00 5,350
93/05/26 3.0 0.42 0 0 --- --- 0.00 14,140
93/05/07 2.9-0.7 0.87 0 1 705 3,670 1.15 6,220
93/05/10 3.0 0.42 0 0 --- --- 0.00 5,350
93/05/26 2.9-0.7 0.40 0 0 --- --- 0.00 14,140
93/06/29 3.0 0.23 0 0 --- --- 0.00 5,290
93/06/29 2.9-0.7 0.95 0 0 --- --- 0.00 5,290
93/09/30 3.0 0.42 0 0 --- --- 0.00 1,060
93/09/30 2.9-0.7 0.79 0 0 --- --- 0.00 1,060
93/10/29 3.0 0.30 0 0 --- --- 0.00 1,660
1994
94/03/30 3.0 0.36 0 0 --- --- 0.00 611 652
94/03/30 2.9-0.7 0.92 0 0 --- --- 0.00 611 652
94/04/28 3.0 0.30 0 0 --- --- 0.00 1,349 1,582
94/04/28 2.9-0.7 0.92 0 1 763 4,375 1.09 1,349 1,582
94/05/18 3.0 0.35 0 1 554 1,725 2.86 5,276 4,899
94/05/18 2.9-0.7 0.64 0 0 --- --- 0.00 5,276 4,899
94/06/14 3.0 0.28 1 1 571 1,950 3.57 1,521 1,442
94/06/14 2.9-0.7 0.52 2 0 --- --- 0.00 1,521 1,442
a The USGS gage at Whitewater, Colorado was used to calculate flows downstream
from Redlands Diversion Dam. Flow data for Redlands Canal were obtained from the
State of Colorado, Division of Water Resources. Additional data were available
to determine streamflows in the 2.3-mile reach immediately downstream from
Redlands Diversion Dam from a gage installed by the Bureau of Reclamation (BR)
March 1994 at Gunnison River RM 2.6. The BR discharge was the daily mean of 24
hourly discharge values.
D-4