N4390
Carrying N4390 over CREEK
1.9S 6E OF WARNER, Muskogee, Oklahoma
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: N4390
The N4390 bridge in Muskogee, Oklahoma carries N4390 over CREEK. It was built in 1937, making it 89 years old today. The structure is built primarily of concrete and spans 2 sections, stretching 7.6 meters (25 feet) end to end. Daily traffic averages 500 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 5/9, superstructure at 5/9, substructure at 4/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 12.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How N4390 compares
Live comparison across Oklahoma.
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 How the historical reference is calculated.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
- 1937
- Material
- Concrete
- Number of Spans
- 2
- Structure Length
- 7.6 m (25 ft)
- Deck Width
- 8.6 m (28 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 500 vehicles/day
- Structure Number
- 050830000000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • At 5/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear flagged for priority repair.
How to read this record
N4390 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 N4390 against other structures in Muskogee 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 N4390?
N4390 in Muskogee, Oklahoma has a deck rating of 5/9, superstructure rating of 5/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is N4390 inspected?
N4390'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 500 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. N4390 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 N4390?
N4390 has an NBI inventory load rating of 12.1 metric tons.
Who is responsible for maintaining N4390?
N4390 is owned and maintained by County Highway Agency.
How old is N4390 and does age affect safety?
N4390 was built in 1937, making it 89 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.