US Bridges

N4350 over Bird Creek

Fair

Choctaw County, Oklahoma · 2.5S 1W of Ft Towson · Structure no. 054550000000000

Built
1937
88 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
77 ft
3 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N4350 over Bird Creek is a concrete slab carrying N4350 over Bird Creek in Choctaw County, Oklahoma. It was built in 1937, so it is 88 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 77 ft (23.5 m) long and 22 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesN4350
CrossesBird Creek
Location2.5S 1W of Ft Towson
RouteCounty Highway N4350
CountyChoctaw County
StateOklahoma
Coordinates33.98531, -95.29556
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length77 ft (23.5 m)
Longest span25 ft (7.6 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$442,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4350 over Bird Creek built?

It was built in 1937, making it 88 years old in 2025.

What condition is N4350 over Bird Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does N4350 over Bird Creek carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N4350 over Bird Creek?

The structure is 77 ft (23.5 m) long with a longest span of 25 ft (7.6 m) and a deck 22 ft wide.

Who owns N4350 over Bird Creek?

It is owned by the County Highway Agency.