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Last modified
7/14/2009 5:02:35 PM
Creation date
5/20/2009 3:28:40 PM
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UCREFRP
UCREFRP Catalog Number
9380
Author
U.S. Bureau of Reclamation.
Title
Grand Valley Irrigation Company Fish Screens (Predesign).
USFW Year
2000.
USFW - Doc Type
Boise.
Copyright Material
NO
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<br />weir is shown on Sheets 10, 11, and 12 in Appendix C, and a photo is shown on Photo 10 in <br /> <br />Appendix A. The ramp portion also pivots up to allow an under-shot gate to be opened for <br /> <br />sluicing. Sheet 8 in Appendix C shows that for a free-flow condition with 44 cfs flowing over <br /> <br />the ramp weir, the depth of flow should be 2.55 feet. <br /> <br />Bypass Pipe Desi~n <br /> <br />The criteria for locating the bypass pipe outlet include the following: <br /> <br />· Attempt to have river velocities greater than 4.0 ips. <br /> <br />· Minimize eddies, reverse flow, or known predator habitat. <br /> <br />· Sufficient depth to ensure fish injuries are avoided at all river and bypass flows. <br /> <br />· Maximum bypass outfall impact velocity less than 25.0 ips. <br /> <br />The location of the bypass pipe outlet will be a point downstream from the return flows from the <br /> <br />aMID powerplant. This location was selected because at certain times of the year, the only <br /> <br />remaining flow in the river below the GVIC diversion dam could be from the OMID powerplant <br /> <br />return flows. The existing topography does not extend to this location, so the exact location of <br /> <br />the bypass outlet has not yet been determined. The proposed bypass outlet location is shown on <br /> <br />Photo 11 in Appendix A. The proposed bypass alignment is shown on Figure 7 and on the aerial <br />photograph, Figure 8, in Appendix B. <br /> <br />For this alternative the bypass pipe will be designed to pass 44 cfs. As was discussed in the <br /> <br />Hydrology section of this memorandum, the bypass will be designed to operate in the range of <br />24 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />
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