US Bridges

S.H. 1 over Washita River Oflow

Fair

Johnston County, Oklahoma · 4.1 MI N Marshall CO · Structure no. 173540000000000

Built
1968
57 years old, rebuilt 2020
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
441 ft
11 main spans
Daily traffic
2,400
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 1 over Washita River Oflow is a steel stringer/multi-beam or girder carrying S.H. 1 over Washita River Oflow in Johnston County, Oklahoma. It was built in 1968 and reconstructed in 2020, so it is 57 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 2,400 vehicles a day, roughly 15% of them trucks, projected to reach 3,840 by 2042. The structure is 441 ft (134.4 m) long and 35 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesS.H. 1
CrossesWashita River Oflow
Location4.1 MI N Marshall CO
RouteState Highway 1
CountyJohnston County
StateOklahoma
Coordinates34.22164, -96.80215
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length441 ft (134.4 m)
Longest span40 ft (12.2 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2022)
Projected traffic3,840 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed21.7 mi (35 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$2.9 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 1 over Washita River Oflow built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2020.

What condition is S.H. 1 over Washita River Oflow 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 May 2024.

How much traffic does S.H. 1 over Washita River Oflow carry?

About 2,400 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 1 over Washita River Oflow?

The structure is 441 ft (134.4 m) long with a longest span of 40 ft (12.2 m) and a deck 35 ft wide.

Who owns S.H. 1 over Washita River Oflow?

It is owned by the State Highway Agency.