CO. RD. N4370
Carrying CO. RD. N4370 over I-40 UNDER
6.1 MI E MCINTOSH, Muskogee, Oklahoma
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
CO. RD. N4370 in Muskogee, Oklahoma sits above 37% of rated Oklahoma bridges on inventory load rating (27 t), while its 1971 build year is earlier than 45% of Muskogee's recorded-year cohort (398 bridges).
CO. RD. N4370 in Muskogee, Oklahoma is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1971, 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:181050000000000
INTERSTATE-ERA · STEEL · MULTI-SPAN · DECK-LED · LOCAL-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- MULTI-SPAN 2 spans
- DECK-LED Deck-led
- LOCAL-ADT Local ADT
- STANDARD-LOAD Standard 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: CO. RD. N4370
The CO. RD. N4370 bridge in Muskogee, Oklahoma carries CO. RD. N4370 over I-40 UNDER. It was built in 1971, making it 55 years old today. The structure is built primarily of steel continuous and spans 2 sections, stretching 67.1 meters (220 feet) end to end. Daily traffic averages 250 vehicles, placing it in the lower-traffic 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 7/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range.
How CO. RD. N4370 compares
Age against the county: built in 1971, earlier than 178 of Muskogee's 398 bridges with a recorded construction year (45%), against a county median build year of 1969. 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).
CO. RD. N4370 vs every rated Oklahoma bridge
Inventory load rating (metric tons), FHWA NBI, this state
27 Top 63% higher than 37% 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.
Muskogee inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 398 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
- 1971
- Material
- Steel Continuous
- Number of Spans
- 2
- Structure Length
- 67.1 m (220 ft)
- Deck Width
- 9.2 m (30 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 250 vehicles/day
- Structure Number
- 181050000000000
Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) rates good at 7/9, 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 CO. RD. N4370 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 CO. RD. N4370 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 CO. RD. N4370?
CO. RD. N4370 in Muskogee, Oklahoma has a deck rating of 6/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is CO. RD. N4370 inspected?
CO. RD. N4370'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 250 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. CO. RD. N4370 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 CO. RD. N4370?
CO. RD. N4370 has an NBI inventory load rating of 27.2 metric tons.
Who is responsible for maintaining CO. RD. N4370?
CO. RD. N4370 is owned and maintained by State Highway Agency.
How old is CO. RD. N4370 and does age affect safety?
CO. RD. N4370 was built in 1971, making it 55 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.