Lower Granite Dam Removable Spillway Weir (RSW)

The purpose of the RSW is to pass juvenile salmon and steelhead downstream over a "raised" spillway crest, similar to a waterfall. This new passage system is a more efficient and less stressful passage route for the juvenile fish. The weir is fitted into spillway #1 at Lower Granite dam. The structure is designed so that in the event of a major flood the RSW can be lowered out of the way into the forebay thereby opening up the spillway to full flow capacity. LEI was proud to be a member of this project that won the 2003 Grand Conceptor Award, from the American Council of Engineering Companies.

McNary Dam Rotating Fish Screen

This facility is located at the McNary Dam on the Columbia River. Its purpose is to dewater Juvenile fish and facilitate their transport by tank cars to the mouth of the river. Existing horizontal dewatering screens at the dam currently dewater the fish, however they frequently plug up with debris and are hard to clean. The Prototype rotating Cylindrical Screen has a built in high-pressure water jet cleaning and debris collection system. It started test operations in the summer of 2001 and results have been very promising.

LEI, subcontracting to Jacobs-Sverdrup Civil was responsible for the mechanical and electrical systems rotating the screen as well as the high pressure water jet cleaning and debris removal.

Washington State Ferries Ongoing Engineering Services

Our engineers have a long history of working on numerous projects for the Washington State Ferries (WSF), Terminal Engineering and Construction Department.  Our involvement goes back to 1990 when Gil Lund, as Chief Engineer of Hamilton Engineering was responsible for the conception and detail design of the first prototype super column passenger overhead loading facility.

Seattle Transportation (Seatrans) Maintenance

Because of Mark Dix and Gil Lund's key participation in the original design of the West Seattle Swing Bridge LEI was contracted by Seattle Transportation to help them develop long term maintenance procedures as well as assisting in maintenance tasks.

Hardesty & Hanover Bridge Rehabilitation Projects

Gil Lund has a longstanding relationship working with the engineers at Hardesy & Hanover LLP on many movable bridge projects. At LEI we have done several bridge rehabilitation projects as a subcontractor for them, focusing on hydraulic motion control. Bascule bridges located in Port Huron and Benton Harbor, Michigan and Chehalis, Washington are projects done under subcontract to Hardesy & Hanover.

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