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PRD bypass on a dam, with high velocity water flowing out of it

Box Canyon Dam

Pend Oreille Public Utility District contracted IIHR to provide hydraulic modeling and analysis to improve the design of fish passage structures for its hydroelectric dams, including Box Canyon.

A picture of Brownlee Dam, with water slowly pouring from the outlet

Brownlee Dam

Idaho Power contracted IIHR to provide hydraulic modeling and analysis to improve the design of fish passage structures for its hydroelectric dams, including the Brownlee Dam.

Cardinal power plant with streamline modeling overtop

Cardinal Power Plant

AEP sought IIHR's expertise to assess river hydraulics and complex flow patterns in the Ohio River near the Cardinal Power Plant. The project goal was to study the feasibility of installing submerged screens in the cooling water intake forebay to meet EPA requirements for fish impingement and entrainment.

a shot of Riffe Lake from overtop the trees, with the blue waters in the background

Cowlitz Falls Dam Fish Collector

IIHR provided hydraulic modeling and analysis to improve the design of fish passage structures for many hydroelectric dams, including Priest Rapids on the Columbia River.

A picture of hells canyon dam, with rocky mountainous terrain surrounding

Hells Canyon Dam

IIHR constructed a large-scale physical model of the Hells Canyon Dam to test proposed fish-passage structures. This laboratory model complemented IIHR's advanced CFD capabilities to simulate performance of fish passage facilities.

a shot of McNary Dam with colorful lines depicting the water flow and output from a program

McNary Dam

IIHR provided modeling and analysis to improve the design of fish passage structures for many hydroelectric dams, including Priest Rapids on the Columbia River.

A model of water and air through the St. Louis sewer system

Metropolitan St. Louis Sewer District

IIHR has extensive experience solving water issues, including the reduction of air in sewer systems. With Jacobs Engineering and the Metropolitan St. Louis Sewer District, IIHR constructed a physical model that includes a vortex dropshaft that, when constructed, will be one of the largest in the world at 20 feet in diameter. 

PRD bypass on a dam, with high velocity water flowing out of it

Priest Rapids Dam

IIHR provided hydraulic modeling and analysis to improve the design of fish passage structures for many hydroelectric dams, including Priest Rapids on the Columbia River.

a colorful CFD model from Madison Wisconsin

Pump Station 15 CFD Models

IIHR researchers worked with Pumping Station 15 in Madison Wisconsin as they retrofitted their pump to handle an increased capacity.

A culvert is pictured with a setting sun shinning through it, reflecting off the water

Self-Cleaning Culverts for Sedimentation Control

IIHR researchers have developed a culvert design that prevents blockage by sedimentation and vegetation. This self-cleaning system flushes out sediment deposits using the power of the stream flow itself.

A picture of construction work being done in the Thames of London, with a beautiful historic building in back

Thames Tideway Tunnel

IIHR was a key partner in the massive effort to make London's sewer system fit for a world-class capital city—one of the largest wastewater infrastructure projects in the world.

A 2D rendering of total dissolved gas modeling, with bright colors to illustrate different levels

Total Dissolved Gas Modeling

Total dissolved gas can be fatal for fish migrating through a hydropower tailrace and the river downstream. IIHR uses sophisticated computer simulations to develop strategies that will minimize TDG at hydropower dams and save fish.

A picture of wanapum dam and fish passage work, done by IIHR

Wanapum Dam

IIHR researchers have developed a culvert design that prevents blockage by sedimentation and vegetation. This self-cleaning system flushes out sediment deposits using the power of the stream flow itself. 

Wave Basin

Wave Energy Converters

The U.S. Department of Engergy (DOE) selected IIHR—Hydroscience & Engineering (IIHR), more than a thousand miles from any ocean, as a test facility for its prestigious Wave Energy Prize competition. 

A wind turbine is pictured against a blue sky, with white clouds floating around it

Wind Energy

IIHR research is working to better understand how weather conditions affect the performance of wind turbines — crucial information needed to build more accurate turbine flow models and optimize operation of turbines in less than ideal conditions.