US Bridges

S.H. 18 over Cimarron River

Fair

Payne County, Oklahoma · 4.6 MI N of JCT SH 33 · Structure no. 275680000000000

Built
2005
20 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
902 ft
9 main spans
Daily traffic
3,500
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 18 over Cimarron River is a prestressed concrete stringer/multi-beam or girder carrying S.H. 18 over Cimarron River in Payne County, Oklahoma. It was built in 2005, so it is 20 years old, younger 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 3,500 vehicles a day, roughly 15% of them trucks, projected to reach 5,600 by 2042. The structure is 902 ft (274.9 m) long and 42 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

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CarriesS.H. 18
CrossesCimarron River
Location4.6 MI N of JCT SH 33
RouteState Highway 18
CountyPayne County
StateOklahoma
Coordinates36.05153, -96.76712
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.5 US tons
Inventory rating40.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9
Design loadHL 93
Structure length902 ft (274.9 m)
Longest span100 ft (30.5 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2022)
Projected traffic5,600 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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$15.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 18 over Cimarron River built?

It was built in 2005, making it 20 years old in 2025.

What condition is S.H. 18 over Cimarron River 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 July 2024.

How much traffic does S.H. 18 over Cimarron River carry?

About 3,500 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 18 over Cimarron River?

The structure is 902 ft (274.9 m) long with a longest span of 100 ft (30.5 m) and a deck 42 ft wide.

Who owns S.H. 18 over Cimarron River?

It is owned by the State Highway Agency.