Fish Passage Case Studies
In-Channel Grade Control

Case Studies .: About .:. Evaluate

Bridge with step-pool channel for grade control

Culvert Retrofit with Corner Baffles, Downstream Channel Regrade with Concrete and Rock Weirs to raise tailwater

Stream Simulation Bottomless Arch Culvert with Step-Pool Reaches to Control Channel Profile

Roughened channel with prefabricated bridge to provide passage over dam and preserve impounded wetland

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

Embedded pipe-arch culvert with downstream boulder grade control

Concrete pool and vortex weir fishway, partially covered by metal arch culvert.

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

Pre-Cast Concrete Bridge with Boulder Steps on Steep Stream

Concrete Fishway and Rock Grade Control

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

Reconstruction of incised channel to eliminate perched bridge apron

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

Metal Box Culvert with Concrete Fishway and Rock Grade Control

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

Culvert embedded and channel regraded with boulder weirs that failed during first year

Bridge Built with Precast Pre-stressed Concrete Beams

Box culvert retrofit with angle baffles and 3 downstream rock weirs