US Bridges

S.H. 66 EB over S.H. 74 under

Good

Oklahoma County, Oklahoma · 5.4 MI E Canadian C/L · Structure no. 185760000000000

Built
1973
52 years old, rebuilt 2020
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
237 ft
2 main spans
Daily traffic
29,850
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 66 EB over S.H. 74 under is a steel continuous stringer/multi-beam or girder carrying S.H. 66 EB over S.H. 74 under in Oklahoma County, Oklahoma. It was built in 1973 and reconstructed in 2020, so it is 52 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 29,850 vehicles a day, roughly 7% of them trucks, projected to reach 47,760 by 2042. The structure is 237 ft (72.3 m) long and 77 ft wide.

Location

Open in Google Maps
CarriesS.H. 66 EB
CrossesS.H. 74 under
Location5.4 MI E Canadian C/L
RouteState Highway 66
CountyOklahoma County
StateOklahoma
Coordinates35.51104, -97.57672
Functional classUrban Other Principal Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 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 rating64.6 US tons
Inventory rating38.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length237 ft (72.3 m)
Longest span126 ft (38.4 m)
Deck width77 ft (23.4 m)
Roadway width74 ft (22.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,850 (2022)
Projected traffic47,760 by 2042
Trucks7%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$5.3 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was S.H. 66 EB over S.H. 74 under built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2020.

What condition is S.H. 66 EB over S.H. 74 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 February 2023.

How much traffic does S.H. 66 EB over S.H. 74 under carry?

About 29,850 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is S.H. 66 EB over S.H. 74 under?

The structure is 237 ft (72.3 m) long with a longest span of 126 ft (38.4 m) and a deck 77 ft wide.

Who owns S.H. 66 EB over S.H. 74 under?

It is owned by the State Highway Agency.