US Bridges

S.H. 18 over Salt Creek

Fair

Osage County, Oklahoma · 5.3 Mi.N.Pawnee Cl · Structure no. 186040000000000

Built
1973
52 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
401 ft
5 main spans
Daily traffic
1,900
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 18 over Salt Creek is a prestressed concrete stringer/multi-beam or girder carrying S.H. 18 over Salt Creek in Osage County, Oklahoma. It was built in 1973, so it is 52 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 5 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 1,900 vehicles a day, roughly 16% of them trucks, projected to reach 3,040 by 2042. The structure is 401 ft (122.2 m) long and 50 ft wide. If it were closed, the detour would be 57.8 mi (93 km).

CarriesS.H. 18
CrossesSalt Creek
Location5.3 Mi.N.Pawnee Cl
RouteState Highway 18
Coordinates36.57832, -96.70354
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.3 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length401 ft (122.2 m)
Longest span80 ft (24.4 m)
Deck width50 ft (15.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2022)
Projected traffic3,040 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed57.8 mi (93 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$2.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 18 over Salt Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is S.H. 18 over Salt 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. 18 over Salt Creek carry?

About 1,900 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is S.H. 18 over Salt Creek?

The structure is 401 ft (122.2 m) long with a longest span of 80 ft (24.4 m) and a deck 50 ft wide.

Who owns S.H. 18 over Salt Creek?

It is owned by the State Highway Agency.