US Bridges

S.H. 66 over S.H. 66 Ramp W-N under

Good

Oklahoma County, Oklahoma · 5.5 MI E Canadian C/L · Structure no. 184670000000000

Built
1973
52 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
30,300
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 66 over S.H. 66 Ramp W-N under is a steel stringer/multi-beam or girder carrying S.H. 66 over S.H. 66 Ramp W-N under in Oklahoma County, Oklahoma. It was built in 1973, 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 30,300 vehicles a day, roughly 7% of them trucks, projected to reach 48,480 by 2042. The structure is 62 ft (18.9 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesS.H. 66
CrossesS.H. 66 Ramp W-N under
Location5.5 MI E Canadian C/L
RouteState Highway 66
CountyOklahoma County
StateOklahoma
Coordinates35.51158, -97.57513
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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span60 ft (18.3 m)
Deck width44 ft (13.3 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,300 (2022)
Projected traffic48,480 by 2042
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was S.H. 66 over S.H. 66 Ramp W-N under built?

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

What condition is S.H. 66 over S.H. 66 Ramp W-N 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 June 2024.

How much traffic does S.H. 66 over S.H. 66 Ramp W-N under carry?

About 30,300 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is S.H. 66 over S.H. 66 Ramp W-N under?

The structure is 62 ft (18.9 m) long with a longest span of 60 ft (18.3 m) and a deck 44 ft wide.

Who owns S.H. 66 over S.H. 66 Ramp W-N under?

It is owned by the State Highway Agency.