US Bridges

3144C/ N4543 over San Bois Creek

FairPosted for load

Haskell County, Oklahoma · 3.1 MI NW of SH 9 · Structure no. 173560000000000

Built
1968
57 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
533 ft
3 main spans
Daily traffic
600
2022 count
Owner
County
County Highway Agency

About this bridge

3144C/ N4543 over San Bois Creek is a steel continuous stringer/multi-beam or girder carrying 3144C/ N4543 over San Bois Creek in Haskell County, Oklahoma. It was built in 1968, so it is 57 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 600 vehicles a day, roughly 15% of them trucks, projected to reach 960 by 2042. The structure is 533 ft (162.5 m) long and 27 ft wide. If it were closed, the detour would be 10.6 mi (17 km).

Location

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Carries3144C/ N4543
CrossesSan Bois Creek
Location3.1 MI NW of SH 9
RouteCounty Highway 3144C
CountyHaskell County
StateOklahoma
Coordinates35.29786, -94.93226
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating8.8 US tons
Inventory rating5.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length533 ft (162.5 m)
Longest span240 ft (73.2 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2022)
Projected traffic960 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed10.6 mi (17 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was 3144C/ N4543 over San Bois Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is 3144C/ N4543 over San Bois 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 June 2023.

How much traffic does 3144C/ N4543 over San Bois Creek carry?

About 600 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 3144C/ N4543 over San Bois Creek?

The structure is 533 ft (162.5 m) long with a longest span of 240 ft (73.2 m) and a deck 27 ft wide.

Who owns 3144C/ N4543 over San Bois Creek?

It is owned by the County Highway Agency.