Matches 1 - 33 out of 33


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8011854 Fish passage apparatus with hydroelectric power generator and method  
An improved fish passage apparatus is combined with hydroelectric power generation to facilitate migration of fish between water bodies of different heights with minimal injury or trauma to fish....
6964541 Fish safe screened water diversion apparatus  
An apparatus for separating animated objects such as fish or other objects between a non-diverted and diverted fluid stream. Embodiments may include a screen or similar selective pass through...
6832578 Bio-hydraulic turbine testing system  
A bio-hydraulic testing system is provided for simulating the effect on fish of at least one hydraulic system component. A water flow introduction device introduces a flow of water into the testing...
6739802 Fish test circuit and method for evaluation of waterway barrier fish bypass systems  
A fish test circuit for the evaluation of waterway barrier bypass systems with a conduit having at least one bypass system test station, water flow within the conduit, fish introduced into the...
6588370 Labyrinth weir and pool fishway  
A fishway is disclosed for providing a pathway around obstacles for fish. The fishway is comprised of a pair of spaced fishway walls and a set of weirs located between the fishway walls for...
6467997 System and method for diverting fish around a structure  
A fish diversion apparatus for a water intake of a dam includes a frame extending between a top end oriented towards the water surface and a bottom end oriented below the water surface. The frame...
6394699 Apparatus for reduced flow fish passage  
The present invention provides an apparatus for reduced flow rate fish passage around dams or other obstructions, having a passage unit with a tubular passageway, an upstream valve, a downstream...
6347908 Fish guidance system  
A series of disturbed (or rippled) air-water interface regions contiguously arranged guide anadromous fish in a selected direction. Artificial or natural light, diffusely refracted by passage...
6325570 Fishway system with turbine  
A lock-type fishway comprises a first part having an opening to lower water for discharging water therethrough to lure fishes to the first part and a second part having an opening to upper water. A...
6273639 Method and apparatus for facilitating migration of fish past dams and other barriers in waterways  
Method and apparatus for fish migration past dams and other water barriers. A preferred embodiment 100 comprises a conduit 101 passing from downstream side 22 of water barrier 10 to upstream side...
5947640 Portable water conveyance assembly  
A portable water conveyance device for diverting the flow of water and particularly, a stream, includes a collapsible tube for receiving the water and conveying the water downstream to a discharge...
5660499 Two-way fish siphon overpass  
A method and apparatus for transporting migratory fish over dams. Fish are transported over dam in downstream migration to the sea and upstream migration to spawning beds. The method includes...
5263833 Fish guiding assembly and method utilizing same  
A fish guiding assembly for use adjacent to dams and the like to channel fish into a safe passage includes an elongated buoyant frame including upper and lower elongated horizontally extending...
5253954 Alternate intake pipe system to eliminate zebra mussel colonization  
A method and apparatus for eliminating zebra mussel colonizations from fresh water intake pipes for facilities, such as power plants and water treatment plants, are disclosed. One or more small...
5161913 Method and apparatus for migratory fish passage to the sea  
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...
4929122 Fish protection system for dams  
A fish protection system for dams comprises a series of modular units which interconnect by male and female fittings on each side of the modular unit. Each modular unit comprises a casing, an inner...
4740105 Fish diversion system  
A diversion system for use in a watercourse for routing fish away from the intake, for example, of a hydroelectric plant. The system includes a plurality of upright screens arranged in zigzag...
4629361 Integrated tubal by-pass fishway  
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...
4488835 Penstock fish diversion system  
A fish diversion system for a penstock housing a hydroelectric turbine employs large area screens to shunt fish to a bypass conduit above the turbine. The screens are disposed generally lengthwise...
4437431 Method and apparatus for diversion of downstream migrating anadromous fish  
This is a method, and apparatus for performing the method, by which artificial stream conditions are generated within the forebay of dams used for hydroelectric facilities. The method includes the...
3938340 Fish holding chamber  
A fish holding chamber for use with a water intake system which includes a watercourse through which water is drawn from a body of water containing fish and debris and a fish diversion or debris...
3868324 Water intake and fish return system  
A travelling water screen unit comprises an endless series of pivotally interconnected rectangular screens. Each screen comprises a frame having ends attachable to corresponding links of parallel...
3783623 FISH ESCALATOR  
An enclosed endless conveyor-type fish elevator for carrying fish upstream over or through a dam. The elevator includes a pair of parallel tubular passageways having one set of identical...
3772891 CONDUIT STRUCTURE FOR MIGRATING FISH  
A conduit for the passage of fish about a dam or other obstruction with the end segments of the conduit being vertically positionable by winch means to best suit migrating fish. The conduit ends...
3596468 FISH LADDERS  
A fish ladder having located within one body of water a chamber which is selectively opened and closed to isolate fish therein, and passage means for delivering into the chamber from a second body...
3820342 FISH EJECTOR SYSTEM  
3338056 Fingerling saving system  
3269124 Tunnel fishway  
3232060 Alternating interrupted passage fishway  
3038760 Fish ladder  
2978873 Fishway structure  
2845779 Fingerling transfer devices  
2803949 Auxiliary fish ladders  
Matches 1 - 33 out of 33