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ATTACHMENT A <br />SUMMARY DESCRIPTION OF FISH PASSAGEWAY <br />(Fishpro, 1994) <br />The Redlands Fish Passageway will be constructed on the right bank of the Gunnison River. <br />This location minimizes impacts to the operations of the diversion dam and access will be <br />maintained. Impacts to the city of Grand Junction will be minimized by routing the passageway <br />around the city's pump station and access to the pump station will be maintained. The increased <br />flows on the right bank into the fish passageway may assist in maintaining a river channel and <br />may minimize sediment impacts in front of the pump station. <br />The passageway will be designed with removable vertical slot and orifice type fish passage <br />baffles. This design allows for a consistent flow pattern over a reasonable range of headwater <br />and tailwater variations. Slots in the passageway will allow placement of baffles at various <br />locations. The fish passageway's entrance is located downstream of the Redlands Diversion <br />Dam's spillway apron and will be controlled by manual slide gates. The fish passageway's exit <br />is located as far upstream of the Redlands Diversion Dam as possible without impacting riparian <br />vegetation (vegetation along the river corridor). A log boom and trash rack will be used to <br />prevent debris from entering the forebay. A trap structure will be built within the forebay for <br />trapping, sorting, and monitoring fish. The fish will be forced into a basket and raised up to <br />a sorting table located under a covered work area. Fish will be sorted, and non - native fish will <br />be returned to the Gunnison River downstream through a 12 -inch diameter fish return pipe. <br />Native fish to be passed upstream can be placed in the forebay upstream of the trap and allowed <br />to swim out through the trash rack. A bypass pipe will be provided along the fish passageway <br />to provide flows of 60 to 75 cfs to attract fish to the entrance of the passageway. <br />Access will be provided by a gravel road to the trap area and the forebay entrance for <br />maintenance of the log boom, trash racks, and sediment removal. A storage shed for secure <br />storage will be in the work area. The fish sorting area will be covered. Electrical service will <br />be provided for fish hoisting, lighting, pumps, and other equipment. <br />Design Criteria is summarized below: <br />Layout <br />- Located on the right bank of the Gunnison River. <br />- Routed around the existing city pump station with minimum of 30 feet clearance. <br />- Personnel will be on site daily during operations. <br />- Operation period will probably be April through September. <br />- Operating Gunnison River flow range will be 300 to 6,360 cfs. <br />35 <br />