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Last modified
1/26/2010 4:34:11 PM
Creation date
3/25/2008 8:38:18 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8240.200.10.A
Description
Colorado River Endangered Fish Recovey Program
Basin
Colorado Mainstem
Date
9/1/2003
Author
UCRBRIP
Title
Recovery Program Director's Update September 2003
Water Supply Pro - Doc Type
Report/Study
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<br />primary research needs identified in the Argonne report. <br /> <br />· . From the Recovery Program's inception in 1988 through June 30, 2003, the <br />Service has consulted on ISO projects with a potential to deplete a total of <br />1,718,890 afin the Upper Colorado River Basin, of which 1,495,167 af are <br />. historic depletions. Three of these "projects" are blanket consultations for <br />depletions under 100 af, up to 7,500 aftotaL Thus far, these three <br />consultations have covered 448 actual projects depleting a total of 6,579 af <br />(4,690 afin Colorado, 1,050 in Utah, and 839 afin Wyoming). Another of <br />these 150 "projects" is the IS-Mile Reach PBO which covers an average <br />depletion of up to 1 million acre-feet per year of existing depletions (through <br />September 30, 1995) and up to 120,000 acre-feet of new depletions (since <br />September 30, 1995) in the Colorado River above the confluence with the <br />Gunnison River. Thus far, the IS-Mile Reach PBO has covered 134 actual <br />projects. In total, then, since January 1988, the Service has consulted on 728 <br />projects depleting water from the upper Colorado River basin. <br /> <br />II. Habitat Restoration <br /> <br />Goal: To provide or enhance habitat for the rare fishes through habitat development or <br />management measures such as: <br />· fish passageways . <br />· screens to prevent fish entrainment into diversion canals <br />· restoration of floodplain and instream habitats. <br /> <br />Status: <br /> <br />· The fish ladder at the Redlands Diversion Dam on the Gunnison River has <br />been operational since June 1996. As of mid-August 2003, the ladder has been <br />used by 53,000 native fishes (versus 7,600 nonnative fishes), including 60 <br />Colorado pikeminnow, six previously-stocked razorback suckers, and one <br />previously-stocked bonytail. Six of the Colorado pikeminnow have used the <br />ladder twice; one has used it three times. Native fishes that were marked and <br />released above the dam dispersed upstream, some as far as 57 river miles to the <br />base of the Hartland Diversion Dam. A ,fish screen will be installed at <br />Redlands during FY05 to prevent entrainment of endangered fishes into the <br />diversion canal. Discussions are underway to conduct an intra-Service <br />consultation to provide incidental take coverage for Redlands operations. <br /> <br />· A fish passage structure was constructed at the Grand Valley Irrigation <br />Company Diversion Dam on the Colorado River in January 1998. Ten adult <br />Colorado pikeminnow were captured above the' GVIC dam between August 19 <br />and September 24, 1998. Providing fish passage at this structure, Price-Stubb, <br />and the Grand Valley Project Diversion Dam will restore 56 miles of <br />histori~ally-occupied habitat for endangered fishes. A fish screen on the canal <br />was completed in March 2002 and operated through early June when drought- <br />year flows became too low to effectively operate the screen facility. <br />Improvements to the fish screen are being made, and in FY04 a deflector wall <br /> <br />7 <br />
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