Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Patent
1983-12-07
1986-12-16
Taylor, Dennis L.
Hydraulic and earth engineering
Fluid control, treatment, or containment
Flow control
405 81, E02B 808
Patent
active
046293612
ABSTRACT:
An integrated tubal by-pass fishway system for use at dams, obstructions and the like, which enable fish to swim freely and safely upstream or downstream on a near natural level with the original stream bed, by-passing the dam or obstruction by means of a tubal fishway system without the aid of ladders, locks, nets, lifts, etc. Included in this system are several devices that attempt to mimic some of the natural aspects of the original stream without upsetting the present environment, without interferring with present activities on the stream and without requiring constant maintenance. The system is devoid of mechanical devices, although certain devices may be added to monitor fish migration, procure fish samples, etc. Since experience with certain anadromous species of fish indicates that fish ladders, locks, etc. are not adequate for the free migration of these fish, the integrated tubal by-pass fishway system seems to be a viable option, an economically produced and installed system and adaptable to many situations which necessitate the migration of certain fish past dams and obstructions in streams and rivers for the preservation and adequate supply of the species.
REFERENCES:
patent: 769910 (1904-09-01), Melbye
patent: 1569419 (1926-01-01), Chase
patent: 2059927 (1936-11-01), Beck
patent: 2174657 (1939-10-01), Helsel
patent: 2978873 (1961-04-01), Wardle
patent: 3269124 (1966-08-01), Leathers
patent: 3772891 (1973-11-01), Raistakka
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