US Bridges

S.H. 11 over Salt Fork Arkansas River

Fair

Alfalfa County, Oklahoma · 7.8E Jct. US 64/SH 8 & 11 · Structure no. 267160000000000

Built
2005
20 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
317 ft
3 main spans
Daily traffic
1,500
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 11 over Salt Fork Arkansas River is a prestressed concrete stringer/multi-beam or girder carrying S.H. 11 over Salt Fork Arkansas River in Alfalfa 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 1,500 vehicles a day, roughly 15% of them trucks, projected to reach 2,400 by 2042. The structure is 317 ft (96.6 m) long and 41 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

Location

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CarriesS.H. 11
CrossesSalt Fork Arkansas River
Location7.8E Jct. US 64/SH 8 & 11
RouteState Highway 11
CountyAlfalfa County
StateOklahoma
Coordinates36.80922, -98.2214
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating81.4 US tons
Inventory rating49.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length317 ft (96.6 m)
Longest span105 ft (32 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2022)
Projected traffic2,400 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.2 mi (55 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$1.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 11 over Salt Fork Arkansas River built?

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

What condition is S.H. 11 over Salt Fork Arkansas 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 October 2023.

How much traffic does S.H. 11 over Salt Fork Arkansas River carry?

About 1,500 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 11 over Salt Fork Arkansas River?

The structure is 317 ft (96.6 m) long with a longest span of 105 ft (32 m) and a deck 41 ft wide.

Who owns S.H. 11 over Salt Fork Arkansas River?

It is owned by the State Highway Agency.