N. FIRST AVE
Carrying N. FIRST AVE over SALEM DITCH
13 S OF HWY 22, Marion, Oregon
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: N. FIRST AVE
The N. FIRST AVE bridge in Marion, Oregon carries N. FIRST AVE over SALEM DITCH. It was built in 1968, making it 58 years old today. The structure is built primarily of prestressed concrete and spans 1 section, stretching 12.2 meters (40 feet) end to end. Daily traffic averages 11,432 vehicles, placing it in the heavily-trafficked tier of Oregon bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. All reported major components score above the Poor range. Its NBI inventory load rating is 40.8 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How N. FIRST AVE compares
Live comparison across Oregon.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1968
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 12.2 m (40 ft)
- Deck Width
- 15.4 m (51 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 11,432 vehicles/day
- Structure Number
- 47B003006600000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • At 7/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
How to read this record
This page shows what the last federal inspection recorded, not whether N. FIRST AVE is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare N. FIRST AVE against other structures in Marion and across Oregon. Oregon bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for N. FIRST AVE?
N. FIRST AVE in Marion, Oregon has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is N. FIRST AVE inspected?
N. FIRST AVE's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 11,432 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. N. FIRST AVE is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for N. FIRST AVE?
N. FIRST AVE has an NBI inventory load rating of 40.8 metric tons.
Who is responsible for maintaining N. FIRST AVE?
N. FIRST AVE is owned and maintained by City/Municipal Highway Agency.
How old is N. FIRST AVE and does age affect safety?
N. FIRST AVE was built in 1968, making it 58 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.