US Bridges

S.H. 18 over Deep Fork River

Fair

Lincoln County, Oklahoma · 10.2N of JCT US62 · Structure no. 276670000000000

Built
2006
19 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
376 ft
3 main spans
Daily traffic
2,700
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 18 over Deep Fork River is a prestressed concrete stringer/multi-beam or girder carrying S.H. 18 over Deep Fork River in Lincoln County, Oklahoma. It was built in 2006, so it is 19 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 2,700 vehicles a day, roughly 15% of them trucks, projected to reach 4,320 by 2042. The structure is 376 ft (114.6 m) long and 43 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

CarriesS.H. 18
CrossesDeep Fork River
Location10.2N of JCT US62
RouteState Highway 18
Coordinates35.64784, -96.88784
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length376 ft (114.6 m)
Longest span125 ft (38.1 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2022)
Projected traffic4,320 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 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$6.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 18 over Deep Fork River built?

It was built in 2006, making it 19 years old in 2025.

What condition is S.H. 18 over Deep Fork 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 Deep Fork River carry?

About 2,700 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 18 over Deep Fork River?

The structure is 376 ft (114.6 m) long with a longest span of 125 ft (38.1 m) and a deck 43 ft wide.

Who owns S.H. 18 over Deep Fork River?

It is owned by the State Highway Agency.