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Briefing Paper to Accompany the Proposed Upper Colorado River and San Juan River Endangered Fish Recovery Act of 1997
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Briefing Paper to Accompany the Proposed Upper Colorado River and San Juan River Endangered Fish Recovery Act of 1997
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7/31/2012 11:42:55 AM
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7/31/2012 11:09:23 AM
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Water Supply Protection
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Briefing Paper to Accompany the Proposed Upper Colorado River and San Juan River Endangered Fish Recovery Act of 1997
State
CO
Basin
Colorado Mainstem
San Juan/Dolores
Title
Briefing Paper to Accompany the Proposed Upper Colorado River and San Juan River Endangered Fish Recovery Act of 1997
Water Supply Pro - Doc Type
Report/Study
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Fruitland Diversion: This quarry rock irrigation diversion dam may be a migration <br />impediment at low flow, though gaps between rocks in the dam probably allow some passage. <br />If fish bypass is required, a long bypass channel is possible. Fish screening would be <br />necessary to keep down- migrating fish out of the canals. <br />Fish propagation facilities ($3 million) <br />Stocking of both razorback sucker and Colorado squawfish is required for recovery. <br />Presently the program relies on "surplus" hatchery - raised fish from upper and lower <br />Colorado River basin facilities for stocking, but facilities are needed in the basin for a <br />reliable supply. At a minimum, such facilities require grow -out ponds. Included in the <br />budget is sufficient funding for a small hatchery, which may be necessary to supply larval <br />and young -of- the -year fish. <br />Habitat modification ($8.5 million) <br />The San Juan River contains less low - velocity habitat than the Green and Colorado rivers. <br />If sufficient low - velocity habitat is not available for use by young Colorado squawfish <br />and razorback suckers, establishing such habitat may be necessary. Studies are under way <br />to determine feasibility of this action. <br />Nonnative vegetation has encroached on the river, changing the shape and form of the <br />river channel and banks. Controlling this vegetation may be necessary in some areas to <br />restore conditions suitable for endangered fish. <br />While specific projects have not been identified, the largest portion of the capital budget <br />is needed for habitat modification. Studies under way will identify specific needs in this <br />area within the next two to three years. <br />
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