N3680
Carrying N3680 over CREEK
1. N& 3.5 W OF HENDRICKS, Bryan, Oklahoma
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
N3680 in Bryan, Oklahoma sits above 8% of rated Oklahoma bridges on inventory load rating (16 t), while its 1997 build year is earlier than 29% of Bryan's recorded-year cohort (286 bridges).
N3680 in Bryan, Oklahoma is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1997, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. The lowest applicable rating sets the federal condition category, so this Fair 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:254760000000000
LATE-CENTURY · STEEL · SINGLE-SPAN · SUB-LED · LOCAL-ADT · LIGHT-LOAD · CAT-FAIR
- LATE-CENTURY 1980–1999
- STEEL Steel
- SINGLE-SPAN Single span
- SUB-LED Substructure-led
- LOCAL-ADT Local ADT
- LIGHT-LOAD Light load
- CAT-FAIR Fair
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: N3680
The N3680 bridge in Bryan, Oklahoma carries N3680 over CREEK. It was built in 1997, making it 29 years old today. The structure is built primarily of steel and spans 1 section, stretching 9.1 meters (30 feet) end to end. Daily traffic averages 50 vehicles, placing it in the lower-traffic tier of Oklahoma bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range.
How N3680 compares
Age against the county: built in 1997, earlier than 83 of Bryan's 286 bridges with a recorded construction year (29%), against a county median build year of 1974. This is one of the newer structures in its county.
Live comparison across Oklahoma bridges with a recorded inventory load rating (22,909 of 22,917 rated).
N3680 vs every rated Oklahoma bridge
Inventory load rating (metric tons), FHWA NBI, this state
16 Top 92% higher than 8% 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.
Bryan inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 286 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
- 1997
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 9.1 m (30 ft)
- Deck Width
- 6.1 m (20 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 50 vehicles/day
- Structure Number
- 254760000000000
Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • 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 fair condition (6/9), with minor deterioration that may require routine maintenance.
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 N3680 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 N3680 against other structures in Bryan 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 N3680?
N3680 in Bryan, Oklahoma has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is N3680 inspected?
N3680'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 50 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. N3680 is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for N3680?
N3680 has an NBI inventory load rating of 16.3 metric tons.
Who is responsible for maintaining N3680?
N3680 is owned and maintained by County Highway Agency.
How old is N3680 and does age affect safety?
N3680 was built in 1997, making it 29 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.