US Bridges

S.H. 9 over I-35 under

Good

McClain County, Oklahoma · S.H. 9W over I-35 · Structure no. 294730000000000

Built
2010
15 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
317 ft
4 main spans
Daily traffic
28,000
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 9 over I-35 under is a prestressed concrete stringer/multi-beam or girder carrying S.H. 9 over I-35 under in McClain County, Oklahoma. It was built in 2010, so it is 15 years old, younger 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 28,000 vehicles a day, roughly 16% of them trucks, projected to reach 44,800 by 2042. The structure is 317 ft (96.5 m) long and 83 ft wide. If it were closed, the detour would be 52.2 mi (84 km).

CarriesS.H. 9
CrossesI-35 under
LocationS.H. 9W over I-35
RouteState Highway 9
Coordinates35.1813, -97.49459
Functional classRural Principal Arterial - Other

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.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating39 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length317 ft (96.5 m)
Longest span106 ft (32.2 m)
Deck width83 ft (25.3 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,000 (2022)
Projected traffic44,800 by 2042
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed52.2 mi (84 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$9.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was S.H. 9 over I-35 under built?

It was built in 2010, making it 15 years old in 2025.

What condition is S.H. 9 over I-35 under 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 August 2023.

How much traffic does S.H. 9 over I-35 under carry?

About 28,000 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is S.H. 9 over I-35 under?

The structure is 317 ft (96.5 m) long with a longest span of 106 ft (32.2 m) and a deck 83 ft wide.

Who owns S.H. 9 over I-35 under?

It is owned by the State Highway Agency.