US Bridges

South Duncan Bypas over S.H. 7 under

Fair

Stephens County, Oklahoma · 8.5 N of S.H. 53 · Structure no. 301390000000000

Built
2017
8 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
670 ft
4 main spans
Daily traffic
2,000
2022 count
Owner
State
State Highway Agency

About this bridge

South Duncan Bypas over S.H. 7 under is a steel stringer/multi-beam or girder carrying South Duncan Bypas over S.H. 7 under in Stephens County, Oklahoma. It was built in 2017, so it is 8 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 2,000 vehicles a day, roughly 25% of them trucks, projected to reach 3,200 by 2042. The structure is 670 ft (204.2 m) long and 41 ft wide.

Location

Open in Google Maps
CarriesSouth Duncan Bypas
CrossesS.H. 7 under
Location8.5 N of S.H. 53
RouteState Highway 0_
CountyStephens County
StateOklahoma
Coordinates34.48715, -97.98226
Functional classRural Principal Arterial - Other

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.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.4 US tons
Inventory rating55.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length670 ft (204.2 m)
Longest span160 ft (48.8 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2022)
Projected traffic3,200 by 2042
Trucks25%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was South Duncan Bypas over S.H. 7 under built?

It was built in 2017, making it 8 years old in 2025.

What condition is South Duncan Bypas over S.H. 7 under 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 South Duncan Bypas over S.H. 7 under carry?

About 2,000 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is South Duncan Bypas over S.H. 7 under?

The structure is 670 ft (204.2 m) long with a longest span of 160 ft (48.8 m) and a deck 41 ft wide.

Who owns South Duncan Bypas over S.H. 7 under?

It is owned by the State Highway Agency.