December 5, 2024 1:00 pm
Joel Tubbs, P.E., S.E., Portland Bridge Practice Lead, David Evans and Associates, Inc.;
Robert DeVassie, P.E., PMP, STP, Agency Project Manager, Oregon Department of Transportation
Documents:
Presentation PDF: Presentation slides December 2024 I-5 over 26th
Intro & News PDF: Intro & News Slides December 2024
Featured Presentation: ODOT Combines Multiple ABC Methods for Maximum Value at I-5 over 26th Ave. (35 minutes)
Description (under 150 words):
ODOT and David Evans and Associated made use of multiple Accelerated Bridge Construction methods for the design and replacement of the I-5 bridge over 26th Avenue. These methods include: prefabricated bridge elements; lateral slide; mechanically-stabilized, low-density cellular concrete walls; micropile foundations; and a weekend full-closure of I-5 to maximize the value to all users and stakeholders. The compounding innovative methods used for the bridge replacement project resulted in reduced construction duration by 6 months, reduced major impacts to the travelling public from 2 years to a single weekend, reduced construction costs by $5.5 million dollars and improved safety for both construction personnel and the traveling public.
Presenters:
Joel Tubbs, P.E., S.E.
Portland Bridge Practice Lead, Bridge Engineer of Record
David Evans and Associates, Inc.
Joel Tubbs is a Senior Bridge Engineer and Project Manager with David Evans and Associates, Inc. Joel has been with DEA for over 25 years after graduating from Washington State University with his Master of Science degree, and has had the opportunity to work on multiple unique and complex projects over his career. Joel is a registered Professional and Structural Engineer in Oregon and Washington, and a proud father of four daughters.
Robert DeVassie, P.E., PMP, STP
Resident Engineer
Oregon Department of Transportation
Consultant Projects (aka Project Manager) for ODOT. Robert has worked for ODOT for over 6 years; coming from Alaska DOT where he served for 15 years in a similar role. He holds his bachelor’s degree in civil engineering and a graduate certificate in design and construction management. Robert is a registered Professional Engineer in Alaska and Oregon, and a certified Project Management Professional.
Presentation Photos/Graphics:
1) Existing I-5 over 26th Avenue Bridge prior to construction. Photo Credit: David Evans and Associates, Inc.
2) Initial placement of the precast, prestressed slabs on the lateral translation falsework. Photo Credit: David Evans and Associates, Inc.
3) Start of construction of the mechanically-stabilized, low-density cellular concrete walls after completion of the new bridge. Photo Credit: Oregon Department of Transportation
4) New bridge construction and local street improvements complete, awaiting the weekend closure for demolition of the existing bridge. Photo Credit: Oregon Department of Transportation
5) Demolition of the existing bridge superstructure and processing of the concrete debris as fill on top of the new structure during the weekend closure. Photo Credit: Oregon Department of Transportation
6) Completed project. Photo Credit: Oregon Department of Transportation