Method and apparatus for migratory fish passage to the sea

Details Method and apparatus for migratory fish passage to the sea Method and apparatus for migratory fish passage to the sea

1992-01-21

1992-11-10

Corbin, David H.

Hydraulic and earth engineering

Fluid control, treatment, or containment

Flow control

405 81, E02B 808

Patent

active

051619130

ABSTRACT:
A method and apparatus for passing migratory fish by dams to the sea. The method includes the creation of a water flow within a main conduit and in one or more collection conduits flowing into the main conduit from spawning areas; lighting the interior of the tubes by artificial lights to attract the fish and keep the fish moving downstream within the conduits; and emptying the fish and water on the downstream side of a dam, preferably by siphoning the water and fish over the dam. The apparatus includes the collection conduits; the main conduit receiving input from the collection conduits; pumps for creating water flow; a lighting system within the conduits; a siphon over the dam; and an open flume for non-pressurized passage of the fish down to the downstream level below the dam. Where more than one dam is encountered, the flume empties into a continuation of the main conduit which, eventually, empties into a screened enclosure for acclimating the fish to brackish waters, while preventing feeding by predators. The apparatus may also include trash deflectors over the entries to the collection conduits; monitors; oxygenators; and rest areas.

REFERENCES:
patent: 1718181 (1929-06-01), Province et al.
patent: 2381100 (1945-08-01), Barr
patent: 3269124 (1966-08-01), Leathers
patent: 4437431 (1984-03-01), Koch
patent: 4629361 (1986-12-01), Zimmerman

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