High-flow sediment-free fish ladder

Details High-flow sediment-free fish ladder High-flow sediment-free fish ladder

2007-07-31

2007-07-31

Singh, Sunil (Department: 3673)

Hydraulic and earth engineering

Fluid control, treatment, or containment

Flow control

C119S219000

Reexamination Certificate

active

10489588

ABSTRACT:
A fishladder (10) for use along a waterway includes a channel having a bottom wall (16), a pair of opposing, up-wardly extending sidewalls (18a, b) and opposing open ends. A series of projections (20) are disposed along the channel between the opposing walls (18a, b), and a series of baffles (22) are also disposed along the channel adjacent the series of projections. The baffles (22) define a sheltered side (28), having sheltered areas with a low water flow rate in which fish can rest, and a flow side capable of carrying water having a higher water flow rate and along which fish can advance up the fish ladder. A passage (30) extends through the battles, which allows water to flow through the sheltered areas at a rate capable of preventing the build-up of sediment in the same sheltered areas, but which does not significantly impede the ability of fish to rest in these areas.

REFERENCES:
patent: 530655 (1894-12-01), Richardson
patent: 1730005 (1929-10-01), Grether
patent: 2094892 (1937-10-01), Hurst
patent: 3962876 (1976-06-01), Phillips
patent: 4260286 (1981-04-01), Buchanan
patent: 4657434 (1987-04-01), Woolnough
patent: 6588370 (2003-07-01), Odeh

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