US Bridges

S.H. 56 over Bird Creek

Fair

Seminole County, Oklahoma · 5.2 MI S JCT US 270 · Structure no. 186810000000000

Built
1974
51 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
48 ft
3 main spans
Daily traffic
1,200
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 56 over Bird Creek is a concrete culvert carrying S.H. 56 over Bird Creek in Seminole County, Oklahoma. It was built in 1974, so it is 51 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 1,200 vehicles a day, roughly 15% of them trucks, projected to reach 1,920 by 2042. The structure is 48 ft (14.6 m) long. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesS.H. 56
CrossesBird Creek
Location5.2 MI S JCT US 270
RouteState Highway 56
CountySeminole County
StateOklahoma
Coordinates35.05896, -96.50218
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating28.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2022)
Projected traffic1,920 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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$763,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 56 over Bird Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is S.H. 56 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 January 2024.

How much traffic does S.H. 56 over Bird Creek carry?

About 1,200 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 56 over Bird Creek?

The structure is 48 ft (14.6 m) long with a longest span of 12 ft (3.7 m).

Who owns S.H. 56 over Bird Creek?

It is owned by the State Highway Agency.