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*For more information, contact your state natural resources agency, such as the Department of Natural Resources or Department of Environmental Protection.
 
*For more information, contact your state natural resources agency, such as the Department of Natural Resources or Department of Environmental Protection.
 
*“Rubber Dam Hydraulics: Hydraulic Design of Inflatable Flexible Membrane Dams.” University of Queensland, Australia, http://www.uq.edu.au/~e2hchans/rubber.html
 
*“Rubber Dam Hydraulics: Hydraulic Design of Inflatable Flexible Membrane Dams.” University of Queensland, Australia, http://www.uq.edu.au/~e2hchans/rubber.html
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===Consolidated Diversions===
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It is not uncommon for diverters to locate several diversion dams close together on a single stream. In certain cases, it is possible to consolidate the number of diversions to a single diversion point, allowing the elimination of some of the dams.
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====Advantages====
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Consolidating diversion points has the benefit of eliminating some or all of the diversion dams involved, and typically reduces the number of diversions that require screens to prevent fish entrainment.
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====Disadvantages====
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One potential drawback of this option is the need to relocate diversion pipes or canals to the new diversion point. Depending on circumstances, this could involve moving water over greater distances, require more materials, or an increase in pumping costs. It could also require some amount of cooperation or coordination among the diverters located together. Also, by consolidating multiple locations into a single diversion point, this diversion point may still create a barrier to migrating fish. While impacts on the stream will be less with fewer dams, there may still be negative impacts.
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====Costs====
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The costs of consolidating diversion points will vary greatly depending on distances between existing diversions, the size of diversions and the size and number of existing dams that would be removed. Costs can range from thousands to millions of dollars
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====Case Study, Consolidated Diversions====
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In the Touchet River basin near Walla Walla, Washington, a project to construct a fish screen, fish ladder and consolidate four irrigation diversions totaling 13 cfs that utilize three dams is expected to cost $883,000. The species that will benefit include steelhead, bull trout, whitefish and several species of native sculpin and minnow. The Upper Salmon River Diversion Consolidation Program cost $2.28 million to consolidate four diversion points totaling 15 cfs by removing three dams and consolidating diversions to a single location and screening the remaining 10 diversions. <ref> Bonneville Power Authority, Ongoing BPA Project Summary: Upper Salmon River Diversion Consolidation Program, 24 July 1997,  http://www.efw.bpa.gov/Environment/EW/PROPOSALS/AIWP/1998/9600700.pdf (3 January
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2003).</ref>
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To learn more about these projects, contact the U.S. Fish and Wildlife Service in Portland, OR at (503) 872-2763
    
==References==
 
==References==
 
<references/>
 
<references/>
 
[[Category:Water]]
 
[[Category:Water]]

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