Laserfiche WebLink
GENERAL <br />GENERAL DESCRIPTION <br />The fish passageway primarily consists of a forebay structure, concrete chute, and a fish <br />entrance structure. A 42-inch concrete bypass pipe parallels the passageway to provide fish <br />attraction flows at the entrance structure. <br />' The fish entrance structure has four gates to provide various flow rates and velocities to <br />attract fish. The concrete chute is 6-foot wide by 350-foot long with depths ranging from 9- to <br />' 18-feet deep. The chute is divided in a series of small pools by 49 aluminum baffles. The forebay <br />structure allows the fish to be trapped, separated, sorted, tagged, and identified or returned <br />downstream. This structure has a log boom and trash rack to screen debris. Concrete wingwalls <br />' project 36 feet upstream and 32 feet downstream of the forebay structure and extend 2 feet higher <br />than the existing bank. <br />The work required about 882 cubic yards of cast-in-place concrete. About 7,200 cubic <br />yards of material was excavated, of which about 3,000 cubic yards was wasted. The waste area <br />was shaped, graded, and will be seeded to blend in with the surrounding terrain. Approximately <br />2,100 cubic yards of structural backfill was required. There was approximately 287 linear feet of <br />42-inch diameter reinforced concrete pipe plus fittings and approximately 400 linear feet of PVC <br />pipe and fittings installed. As mentioned in the first paragraph there are 49 aluminum baffles and <br />a variety of miscellaneous metalwork (gratings, trash screens. etc) installed. The passageway site <br />is secured with a 6-foot high chain link fence and a security light. The passageway walls also have <br />a 3-foot high chain link fence with escape ladders and openings in the fence located at 3 locations <br />along the chute. The ladders extend from the floor of the chute to the top of the wall. <br />Gen-4