US Bridges

S.H. 74 over I-35 under

Poor

McClain County, Oklahoma · 2.7 MI S Clev. C/L · Structure no. 144960000000000

Built
1959
66 years old
Condition
Poor
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
272 ft
4 main spans
Daily traffic
5,400
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 74 over I-35 under is a steel continuous stringer/multi-beam or girder carrying S.H. 74 over I-35 under in McClain 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5,400 vehicles a day, roughly 15% of them trucks, projected to reach 8,640 by 2042. The structure is 272 ft (82.9 m) long and 31 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

Open in Google Maps
CarriesS.H. 74
CrossesI-35 under
Location2.7 MI S Clev. C/L
RouteState Highway 74
CountyMcClain County
StateOklahoma
Coordinates35.15306, -97.47687
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length272 ft (82.9 m)
Longest span83 ft (25.3 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2022)
Projected traffic8,640 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed29.2 mi (47 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$4.1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was S.H. 74 over I-35 under built?

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

What condition is S.H. 74 over I-35 under in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.

How much traffic does S.H. 74 over I-35 under carry?

About 5,400 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 74 over I-35 under?

The structure is 272 ft (82.9 m) long with a longest span of 83 ft (25.3 m) and a deck 31 ft wide.

Who owns S.H. 74 over I-35 under?

It is owned by the State Highway Agency.