September 25, 2025 1:00 pm
Amy Leland, P.E., S.E., State Bridge Design Engineer, Bridges & Structures, Washington State DOT; Anthony Mizumori, P.E., S.E., Bridge Design Engineer, Bridges & Structures, Washington State DOT
Presentation begins: 07:43
Q&A begins: 40:10
Documents:
News & Intro PDF: News - Intro Slides September 2025
Presentation PDF: Vantage Bridge Deck Replacement
Question & Answer: Question & Answer - Vantage Bridge
Description:
This project replaces the concrete deck for the bridge carrying Interstate 90 over the Columbia River at Vantage, WA while maintaining two-way traffic on the span. The existing 1950’s bridge is a 2,500’+ bridge with a steel tied-arch main span and steel girder approach spans with a rapidly deteriorating deck. The high traffic volumes and long detour routes necessitate the bridge being kept open to traffic at all times. Precast concrete deck panels with ultra-high-performance concrete connections comprise the new bridge deck. Precast concrete was selected for construction speed, vibration tolerance, and long-term durability. Steel cross-frame strengthening and extensive temporary support framing were needed to provide a load path for the existing and new deck during intermediate stages of construction. Sequencing requirements and construction load allowances were developed during design and specified in the plans to establish limits for lifting gantries operating on the deck adjacent to traffic.
Featured Presentation: In-Service Deck Replacement - I-90 Columbia River Bridge Vantage, Washington (35 minutes)
Presenters:
Anthony Mizumori, P.E., S.E.,
Bridge Design Engineer
Bridges & Structures
Washington State DOT
Anthony Mizumori is bridge engineer with the Bridge and Structures Office of the Washington State DOT. He is a bridge designer and subject matter expert for concrete structure design policy for WSDOT. His experience and interests include bridge rehabilitation projects, innovative structural materials, and prestressed concrete structures. Anthony has been with WSDOT for 22 years and is a licensed structural engineer in Washington State.
Amy Leland, P.E., S.E.,
State Bridge Design Engineer
Bridges & Structures
Washington State DOT
Amy Leland is the State Bridge Design Engineer for the Washington State Department of Transportation. Amy graduated with her Masters of Science degree in Engineering from the University of Washington, and is licensed as a Professional Engineer and Structural Engineer. Amy has been working in the WSDOT Bridge Design Office since 1999. Her bridge design experience includes structural analysis and design for reinforced concrete, prestressed concrete, post-tensioned concrete, and steel bridges. Amy was previously the Bridge Seismic and Foundation Specialist for the WSDOT Bridge Design Office. She has participated in establishing policy and overseeing research for WSDOT.
Presentation Photos/Graphics:
1) Elevation view of the Columbia River Bridge at Vantage (photo courtesy of WSDOT)
2) Gantry placement of precast concrete deck panel (photo courtesy of WSDOT)
3) Temporary under-deck support system (photo courtesy of WSDOT)
4) Ultra-high performance concrete deck closures (photo courtesy of WSDOT)