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<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 /> <br />PREDESIGN MEMORANDUM <br />GRAND VALLEY IRRIGATION COMPANY <br />FISHSCREENS <br /> <br />Introduction <br /> <br />This Predesign Memorandum is prepared for the Bureau of Reclamation, Western Colorado Area <br /> <br />Office - Northern Division (WCAO-ND). The report summarizes known information about the <br /> <br />existing diversion facilities at the Gand Valley Irrigation Company (GVIC) canal and describes <br /> <br />options to be considered for the improvement of fish protection at the site. Implementation of <br /> <br />the recommended actions will be coordinated with the irrigation district, State and Federal <br /> <br />agencies. Selection of a preferred option will be used in the final design phase of the project. <br /> <br />The Upper Colorado River Endangered Fish Recovery Program goal for this project is to prevent <br /> <br />the loss of the target species with a 300 mm total length or larger from being entrained in <br /> <br />diversion facilities. The target endangered species found in the Grand Valley are the Colorado <br /> <br />pikeminnow and the razorback sucker. This criteria was based on the concept that there is very <br /> <br />little evidence of upstream spawning and that upstream stocking will be with 300 mm fish. <br /> <br />Unpublished research by Mr. Rich Valdez has developed the following relationships between <br /> <br />total length (TL) and maximum body diameter (BD): <br />Colorado pikeminnow - <br /> <br />1 <br />