US Bridges

S.H. 31 over San Bois Creek

Fair

Haskell County, Oklahoma · 2.3 E JCT SH-2 · Structure no. 153650000000000

Built
1961
64 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
182 ft
3 main spans
Daily traffic
1,400
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 31 over San Bois Creek is a steel stringer/multi-beam or girder carrying S.H. 31 over San Bois Creek in Haskell County, Oklahoma. It was built in 1961, so it is 64 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.

It carries about 1,400 vehicles a day, roughly 15% of them trucks, projected to reach 2,240 by 2042. The structure is 182 ft (55.6 m) long and 34 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

Location

Open in Google Maps
CarriesS.H. 31
CrossesSan Bois Creek
Location2.3 E JCT SH-2
RouteState Highway 31
CountyHaskell County
StateOklahoma
Coordinates35.11126, -95.20034
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length182 ft (55.6 m)
Longest span60 ft (18.3 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2022)
Projected traffic2,240 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.2 mi (55 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 31 over San Bois Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is S.H. 31 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 October 2024.

How much traffic does S.H. 31 over San Bois Creek carry?

About 1,400 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 31 over San Bois Creek?

The structure is 182 ft (55.6 m) long with a longest span of 60 ft (18.3 m) and a deck 34 ft wide.

Who owns S.H. 31 over San Bois Creek?

It is owned by the State Highway Agency.