By Keith K. Daellenbach, Contributing Writer

The NE 42nd Ave. bridge that services ingress and egress from the eastern edge of Concordia is due for replacement and a new bridge will be completed in approximately two years. It will provide safer transport for the 5,000 vehicles that cross over this span daily by taking bicyclists, pedestrians, large freight trucks, and seismic safety into account. Full closure to bridge access began August 11th, 2025 and detours are in place including NE Columbia Boulevard, NE Cully Boulevard, and NE 82nd Avenue.
The existing bridge is a five-span, four-abutment bridge, which crosses over the key east-west transportation corridor of NE Lombard Street (Highway 30) and the Union Pacific railroad tracks. The design was approved on June 16, 1938 and the bridge was likely constructed between 1938 and 1939. The original bridge has lasted nearly 40 years beyond its original life expectancy of 50 years.
Modern Concerns
While originally designed to accommodate H-15 trucks, which weigh 6,000 pounds on the front axle, 24,000 pounds on the rear axle, and have a 14-foot wheelbase; today’s H-20 trucks weigh 80,000 pounds and so the new bridge is designed to safely carry a suite of Oregon-specific over-dimensional truck configurations up to 258,000 pounds, spread over 13 axles.
Other modern concerns will also be taken into account. In 1938, no consideration was made to establish a structure for safe bicycling and that will be remedied with the new bridge.
Finally, the current span did not consider seismic design requirements and thus the current bridge is not seismically stable. Since we know that our region will experience a major Cascadia subduction zone earthquake in the future, the design of the replacement bridge follows modern American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) seismic bridge design specifications which rely on Oregon’s Cascadia Subduction Zone hazard maps for collapse prevention and life-safety. The “earthquake-ready” design removes weight restrictions along the north-south freight connection between Lombard and Columbia Boulevard.
Costs
Design work was initiated in 2019 and completed in 2021. The initial $18 million bid for bridge construction was originally received by PBOT in December 2023. Following a schedule update that allowed more time for bridge demolition and new bridge erection, a second and final bid from Cascade Bridge LLC (Vancouver, Washington), with extensive experience in Pacific Northwest bridge construction, was received and accepted at $16 million a year later in December 2024.
The total estimated project cost is $25 million dollars which includes additional “soft costs” such as design, construction engineering, and oversight. These funds were assembled by PBOT (Portland Bureau of Transportation) with funding from City of Portland General Fund and its Heavy Vehicle Use Tax (HVUT), PBOT’s System Development Charges (SDC) and Portland Clean Energy Community Benefits Fund (PCEF).
The New Design
Today’s bridge has no bike lane and a single narrow sidewalk. The new bridge, classified as a major emergency transportation route, will also have a 50-year minimum expected lifespan. It will be constructed with drilled concrete shafts for support abutment foundations and two 145-foot, curved steel girders, one for each span with one abutment in the middle. Across the bridge span, there will be a 7-foot wide elevated bike lane on the west side, two 13-foot wide travel lanes, and a 10-foot wide elevated multi-use path that accommodates pedestrian, ADA, and bicycle access on the east side. An adjacent PBOT connector project is planned to establish a bike path from nearby NE 47th Avenue, at the northern terminus of the bridge, along NE Cornfoot Road for completion in January 2026. Eventually, it will be possible to cycle on bike paths all the way to Portland International Airport via NE Alderwood Road and NE 82nd Avenue.
While fourteen trees on the south side of NE Lombard Street will be removed to accommodate a contractor staging and storage area, these trees will be replanted following bridge completion. Over 30 other mature trees immediately west of the approach to the bridge and south of NE Lombard Street will be spared.
The span will be 2-feet higher on the underside to accommodate today’s high-clearance freight trucks on NE Lombard Street. It will remove the current “pinch point” under the bridge by widening the space adjacent to vehicular lanes and include a bike lane. The upgrade package includes new signing, striping, illumination, and stormwater drainage.
Project Implementation
Currently, Cascade Bridge is focused on site preparation and utility installation. Eventually, up to four weekend closures to vehicular traffic on NE Lombard Street will be scheduled to execute bridge demolition and span placement. To learn more, visit
PBOT’s “NE 42nd Avenue Bridge Replacement (over Lombard Street)” at bit.ly/3JdefBd.
Following the structural upgrade of the NE 33rd Avenue bridge just nine blocks west, completed in July 2023, PBOT, with its partners, is again taking action in our neighborhood to build safe and efficient transport with bridge installation over a primary east-west vehicular and railroad transportation corridor at NE 42nd Avenue. It will be finished in two year’s time and will serve our neighborhood for decades to come.
Keith Daellenbach is a mechanical engineer and outdoor enthusiast who loves mountain climbing, skiing, biking, canoeing, noeing, and and beekeeping with wife Amy and son Micah.

Marsha was born November 24th, 1948 in the back bay of Boston to second-generation Jewish immigrants. Her uncles were the first bagel bakers in Boston and started the Boston Bagel Company. Marsha had an older sister named Ronda.