Guide to Fish Rescue from Turbine Dewatering Process
Bob Cordie
The Dalles Fisheries Section
March 2021
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Approx 4’x4’ personnel access and fish egress
Fish are bagged (Salmonids placed in separate bag and removed first if possible), removed by the
tugger, and then placed into the fish tank that has been placed in the gallery prior to fishing the
unit. Raw water is obtained at the first floor (where?). Should the tank be aerated? Where is the
lid? How many fish in tank? The tank is pushed to the nearest shaft, where a rigger secures it for
removal to the fourth floor.
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7/22/2024
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Small enough to fit through gallery hatch. Too small for sturgeon >6’. Too large for draft tube.
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6’x6’ hatch leading from draft tube gallery.
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Transports tank to powerhouse door
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Detailed procedure for rescuing fish from turbine dewatering, including steps like hoisting sturgeon, salvaging fish in tanks, and using gantry cranes to transport them. The process involves specialized equipment and careful handling to ensure the safety of the fish. Images illustrate key steps in the fish rescue operation, providing insights into the meticulous process involved in saving aquatic life during turbine maintenance activities.
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Presentation Transcript
PROCEDURE FOR FISH RESCUE FROM TURBINE DEWATERING Bob Cordie The Dalles Fisheries Section March 2021
TYPICAL STURGEON SIZE FOR DRAFT TUBE
4 DRAFT TUBE HATCH Approx 4 x4 personnel access and fish egress Fish are bagged (Salmonids placed in separate bag and removed first if possible), removed by the tugger, and then placed into the fish tank that has been placed in the gallery prior to fishing the unit. Raw water is obtained at the first floor (where?). Should the tank be aerated? Where is the lid? How many fish in tank? The tank is pushed to the nearest shaft, where a rigger secures it for removal to the fourth floor.
6-7 STURGEON HOISTED BY STRETCHER FROM DRAFT TUBE FLOOR 5 7/22/2024
6 FISH SALVAGE TANK Small enough to fit through gallery hatch. Too small for sturgeon >6 . Too large for draft tube.
7 HATCH ABOVE DRAFT TUBE GALLERY 6 x6 hatch leading from draft tube gallery.
8 POWERHOUSE GANTRY CRANE Transports tank to powerhouse door
9 CAN I COME OUT NOW? 7/22/2024
