Engineers' Society of Western Pennsylvania


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Featured State


Featured State Session

Monday, June 10; 2:00 – 5:30 PM
Room: Cherry Blossom
Chair: Mark Gaines, Washington State DOT, Olympia, WA

From Fish Passages to Floating Bridges, the structures owned and maintained by the State of Washington are as diverse as the State itself. Our unique inventory includes over 3000 bridge structures, Ferry terminal structures, and a tunnel running beneath downtown Seattle. We are proud to be on the cutting edge of technology that aids in Accelerated Bridge Construction as well as resiliency during a seismic event.  Structures “reign” in Washington State.

WSDOT Fish Passage Program

Richard Zeldenrust, P.E., S.E., Washington State DOT, Olympia, WA

Washington State is fortunate to have an inland sea and a substantial stream system, with historically large wild salmon populations. Over 100 years of construction on the State Highway System has created fish passage barriers on many of these streams. This presentation will describe the WSDOT Fish Passage Program, and how WSDOT is helping to restore the salmon populations by actively eliminating these barriers from our streams and rivers.

Washington State’s Floating Bridges

Nicholas T. Rodda, P.E., S.E., Washington State DOT, Olympia, WA

Washington State has been a leader in floating bridge design and construction for nearly 80 years.  Our first floating bridge opened in 1940 and since that time our inventory has grown to four.  This presentation will cover a brief history of our floating bridges, some of the challenges we have encountered over the years, an overview of some of our latest floating bridge projects and a look at some of our upcoming work.

Innovations in WSDOT Bridge Design and Accelerated Bridge Construction

Bijan Khaleghi, P.E., S.E., Washington State DOT, Olympia, WA

This presentation focuses on recent WSDOT innovations including: 1) The use of super-elastic shape memory alloy and flexible concrete in bridge columns for improved seismic resiliency. 2) The use of Concrete-filled steel tubes in bridge columns and deep foundations. 3) The use of UHPC for connection of newly developed wide flange precast deck girders to accelerate bridge construction and improve long-term performance. 4) Innovations in bridge design and construction meeting the post-earthquake functionality requirements.

WSDOT Bridge Asset Management – lessons learned

DeWayne Wilson, P.E., Washington State DOT, Olympia, WA

This presentation will provide an overview of WSDOT’s Bridge Asset Management 10 year plan and provide some examples of lessons learned. WSDOT has a unique inventory of 3,322 bridges that connect roads over a diverse terrain and climates from the Pacific Ocean in the west thru the Cascade Mountains to the farmlands and rolling hills in the east.  The WSDOT bridge network contains a variety of bridge types including floating bridges, Movable bridges, Steel Trusses, Reinforced / Prestress and Postensioned Concrete and timber bridges.

Seismic Risk Analysis of Ferry Terminal Assets

Jeri Bernstein, P.E., S.E., Washington State DOT, Olympia, WA

Washington State Ferries is the largest ferry system in the United States and is part of the Washington State Highway system. The Washington State Ferries system is located within a region of faults with high potential for seismic activity. As a result, the seismic risk aspect is highly influential in the planning and prioritization of bridge structure replacement projects. This presentation will explain how seismic risk for the terminal assets are determined.

Digging Deeper into the Alaskan Way Viaduct Replacement Program

Tim Moore, P.E., SE, Washington State DOT, Olympia, WA

The State Route 99 Alaskan Way Viaduct, an elevated concrete structure built in the 1950s and vulnerable to earthquakes, is being replaced with a 1.7-mile tunnel running beneath downtown Seattle. This presentation will focus on the design and construction of the major structural components of the Project and the world’s largest Tunnel Boring Machine at the time of construction.