US Bridges

S.H. 8 over West Clay Creek

Fair

Alfalfa County, Oklahoma · 3.2 MI.N.JCT.SH45 · Structure no. 135070000000000

Built
1955
70 years old, rebuilt 2011
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
132 ft
3 main spans
Daily traffic
1,400
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 8 over West Clay Creek is a steel stringer/multi-beam or girder carrying S.H. 8 over West Clay Creek in Alfalfa County, Oklahoma. It was built in 1955 and reconstructed in 2011, so it is 70 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 132 ft (40.2 m) long and 33 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

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CarriesS.H. 8
CrossesWest Clay Creek
Location3.2 MI.N.JCT.SH45
RouteState Highway 8
CountyAlfalfa County
StateOklahoma
Coordinates36.61591, -98.39733
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.4 US tons
Inventory rating53.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length132 ft (40.2 m)
Longest span50 ft (15.2 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.4 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 closed24.9 mi (40 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$1.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 8 over West Clay Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2011.

What condition is S.H. 8 over West Clay 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 September 2023.

How much traffic does S.H. 8 over West Clay Creek carry?

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

How long is S.H. 8 over West Clay Creek?

The structure is 132 ft (40.2 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns S.H. 8 over West Clay Creek?

It is owned by the State Highway Agency.