US Bridges

S.H. 1 over Oflow

Good

Johnston County, Oklahoma · 2.8 MI S-W JCT SH 22 · Structure no. 173290000000000

Built
1968
57 years old, rebuilt 2021
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
201 ft
5 main spans
Daily traffic
2,400
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 1 over Oflow is a steel stringer/multi-beam or girder carrying S.H. 1 over Oflow in Johnston County, Oklahoma. It was built in 1968 and reconstructed in 2021, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,400 vehicles a day, roughly 15% of them trucks, projected to reach 3,840 by 2042. The structure is 201 ft (61.3 m) long and 35 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

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CarriesS.H. 1
CrossesOflow
Location2.8 MI S-W JCT SH 22
RouteState Highway 1
CountyJohnston County
StateOklahoma
Coordinates34.2308, -96.79837
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to 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 spans5
Design loadHS 20
Structure length201 ft (61.3 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
CrossesWaterway
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$2.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 1 over Oflow built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2021.

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

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

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

How long is S.H. 1 over Oflow?

The structure is 201 ft (61.3 m) long with a longest span of 40 ft (12.2 m) and a deck 35 ft wide.

Who owns S.H. 1 over Oflow?

It is owned by the State Highway Agency.