OR 18 (Hwy 39)
Carrying OR 18 (Hwy 39) over Jackass Creek
2.64 MI N GRANDE RONDE, Polk, Oregon
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
OR 18 (Hwy 39) in Polk, Oregon sits above 85% of rated Oregon bridges on inventory load rating (47 t), while its 2005 build year is earlier than 14% of Polk's recorded-year cohort (161 bridges).
OR 18 (Hwy 39) in Polk, Oregon is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 2005, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure OR:19271 039 01916
POST-2000 · PRESTRESS · SINGLE-SPAN · DECK-LED · ARTERIAL-ADT · HEAVY-LOAD · CAT-GOOD
- POST-2000 2000+
- PRESTRESS Prestressed concrete
- SINGLE-SPAN Single span
- DECK-LED Deck-led
- ARTERIAL-ADT Arterial ADT
- HEAVY-LOAD Heavy load
- CAT-GOOD Good
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: OR 18 (Hwy 39)
The OR 18 (Hwy 39) bridge in Polk, Oregon carries OR 18 (Hwy 39) over Jackass Creek. It was built in 2005, making it 21 years old today. The structure is built primarily of prestressed concrete and spans 1 section, stretching 12.5 meters (41 feet) end to end. Daily traffic averages 7,853 vehicles, placing it in the moderately-trafficked tier of Oregon bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 8/9, substructure at 8/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How OR 18 (Hwy 39) compares
Age against the county: built in 2005, earlier than 22 of Polk's 161 bridges with a recorded construction year (14%), against a county median build year of 1974. This is one of the newer structures in its county.
Live comparison across Oregon bridges with a recorded inventory load rating (8,282 of 8,305 rated).
OR 18 (Hwy 39) vs every rated Oregon bridge
Inventory load rating (metric tons), FHWA NBI, this state
47 Top 15% higher than 85% of 8,282 bridges
rated Oregon bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Polk inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 161 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 2005
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 12.5 m (41 ft)
- Deck Width
- 11.6 m (38 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 7,853 vehicles/day
- Structure Number
- 19271 039 01916
Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • At 8/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • The substructure (piers and abutments) rates good at 8/9, with no significant deterioration on file.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether OR 18 (Hwy 39) 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 OR 18 (Hwy 39) against other structures in Polk 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 OR 18 (Hwy 39)?
OR 18 (Hwy 39) in Polk, Oregon has a deck rating of 7/9, superstructure rating of 8/9, and substructure rating of 8/9 on the FHWA's 0–9 scale.
How often is OR 18 (Hwy 39) inspected?
OR 18 (Hwy 39)'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 7,853 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. OR 18 (Hwy 39) 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 OR 18 (Hwy 39)?
OR 18 (Hwy 39) has an NBI inventory load rating of 47.0 metric tons.
Who is responsible for maintaining OR 18 (Hwy 39)?
OR 18 (Hwy 39) is owned and maintained by State Highway Agency.
How old is OR 18 (Hwy 39) and does age affect safety?
OR 18 (Hwy 39) was built in 2005, making it 21 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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.