U.S. 270 RAMP S-W
Carrying U.S. 270 RAMP S-W over I-40 /U.S. 177 UNDER
8.1 MI E OK C/L, Pottawatomie, Oklahoma
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
U.S. 270 RAMP S-W in Pottawatomie, Oklahoma sits above 89% of rated Oklahoma bridges on inventory load rating (46 t), while its 1961 build year is earlier than 73% of Pottawatomie's recorded-year cohort (408 bridges).
U.S. 270 RAMP S-W in Pottawatomie, Oklahoma is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1961, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor 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 OK:153790000000000
INTERSTATE-ERA · STEEL · LONG-SPAN-RUN · SUB-LED · HEAVY-ADT · HEAVY-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- LONG-SPAN-RUN 4 spans
- SUB-LED Substructure-led
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy load
- CAT-POOR Poor
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: U.S. 270 RAMP S-W
The U.S. 270 RAMP S-W bridge in Pottawatomie, Oklahoma carries U.S. 270 RAMP S-W over I-40 /U.S. 177 UNDER. It was built in 1961, making it 65 years old today. It was last reconstructed in 1979, extending its service life. The structure is built primarily of steel and spans 4 sections, stretching 111.9 meters (367 feet) end to end. Daily traffic averages 16,100 vehicles, placing it in the heavily-trafficked tier of Oklahoma bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 7/9, substructure at 4/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed.
How U.S. 270 RAMP S-W compares
Age against the county: built in 1961, earlier than 298 of Pottawatomie's 408 bridges with a recorded construction year (73%), against a county median build year of 1990. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Oklahoma bridges with a recorded inventory load rating (22,909 of 22,917 rated).
U.S. 270 RAMP S-W vs every rated Oklahoma bridge
Inventory load rating (metric tons), FHWA NBI, this state
46 Top 11% higher than 89% of 22,909 bridges
rated Oklahoma 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.
Pottawatomie inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 408 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
- 1961
- Last Reconstructed
- 1979
- Material
- Steel
- Number of Spans
- 4
- Structure Length
- 111.9 m (367 ft)
- Deck Width
- 9.4 m (31 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 16,100 vehicles/day
- Structure Number
- 153790000000000
Condition Analysis
- • The deck (driving surface) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) is in poor condition (4/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
U.S. 270 RAMP S-W is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare U.S. 270 RAMP S-W against other structures in Pottawatomie and across Oklahoma. Oklahoma 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 U.S. 270 RAMP S-W?
U.S. 270 RAMP S-W in Pottawatomie, Oklahoma has a deck rating of 6/9, superstructure rating of 7/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is U.S. 270 RAMP S-W inspected?
U.S. 270 RAMP S-W'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 16,100 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. U.S. 270 RAMP S-W is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for U.S. 270 RAMP S-W?
U.S. 270 RAMP S-W has an NBI inventory load rating of 46.4 metric tons.
Who is responsible for maintaining U.S. 270 RAMP S-W?
U.S. 270 RAMP S-W is owned and maintained by State Highway Agency.
How old is U.S. 270 RAMP S-W and does age affect safety?
U.S. 270 RAMP S-W was built in 1961, making it 65 years old and last reconstructed in 1979.
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.