Fish Passage & Protection
Alden’s fisheries scientists and engineers are world-renowned experts in developing and evaluating fish passage technologies for all types of water intakes and dams. Selected experience includes:
§316(b) CWIS Technology Studies
- Wedge wire screen flow model studies
- Aquatic filter barrier studies
- Development of Ristroph fish screen design details
- Angled fish diversion screen designs
- Analyses of stressor levels in fish return systems
- Air bubble curtain analyses for fish protection
- Hydraulic zone of influence studies
- Analysis of screenwell flow patterns
- Ichthyoplankton sampler design and location studies
Hydroelectric Projects
- Louver design and effectiveness optimization studies
- Angled bar rack hydraulic analyses
- Development of channel geometries to optimize fish passage into a surface bypass collector
- Analyses of tailrace flows to minimize fish stranding
Fish Passage Around Dams
- Dam removal hydraulic analyses
- Fish ladder flow analyses
- Restoration alternatives analyses
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