US Bridges

S.H. 30 over Washita River

Good

Roger Mills County, Oklahoma · 7.5 MI N JCT S.H. 47 · Structure no. 145080000000000

Built
1959
66 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
452 ft
4 main spans
Daily traffic
860
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 30 over Washita River is a steel continuous stringer/multi-beam or girder carrying S.H. 30 over Washita River in Roger Mills County, Oklahoma. It was built in 1959, so it is 66 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 860 vehicles a day, roughly 15% of them trucks, projected to reach 1,376 by 2042. The structure is 452 ft (137.8 m) long and 32 ft wide. If it were closed, the detour would be 42.3 mi (68 km).

Location

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CarriesS.H. 30
CrossesWashita River
Location7.5 MI N JCT S.H. 47
RouteState Highway 30
CountyRoger Mills County
StateOklahoma
Coordinates35.75954, -99.9256
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+1 approach)
Design loadH 20
Structure length452 ft (137.8 m)
Longest span100 ft (30.5 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic860 (2022)
Projected traffic1,376 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.3 mi (68 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$3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 30 over Washita River built?

It was built in 1959, making it 66 years old in 2025.

What condition is S.H. 30 over Washita River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does S.H. 30 over Washita River carry?

About 860 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 30 over Washita River?

The structure is 452 ft (137.8 m) long with a longest span of 100 ft (30.5 m) and a deck 32 ft wide.

Who owns S.H. 30 over Washita River?

It is owned by the State Highway Agency.