Fish Passage Case Studies
Retrofit

Case Studies .: About .:. Evaluate

Culvert Retrofit, Corner Baffle Retrofit, Hydraulic Design

Low-water crossing with added low-flow culvert

Culvert Retrofit with Corner Baffles, Downstream Channel Rev mo0grade with Concrete and Rock Weirs to raise tailwater.

Culvert Rehabilitation with Metal Insert, Corner Baffle Retrofit, Hydraulic Design, Placement of Concrete Weirs

Hybrid Pool and Weir Fishway with Concrete Pools and Removable Wood Baffles, Hydraulic Design

Grouted rock step pools below outlet, Retrofit box culvert with offset baffles

Constructing small step-pools into rock & concrete bridge apron

Retrofit with pool-and-weir fish ladder around grade control structure at bridge crossing

Culvert extension for highway widening, addition of concrete weirs, and construction of grouted roughened channel below outlet apron

Stream Simulation, bottomless arch, undermined footing retrofit with concrete weir-struts

Boulders randomly placed below culvert to raise channel grade and eliminate a perched outlet

Removal of flashboard dam, requiring addition of boulder weirs below upstream culvert

Box culvert retrofit with angle baffles and 3 downstream rock weirs

Culvert Retrofit, Offset Baffle Retrofit, Hydraulic Design