US Bridges

NW 122nd St. over S.H. 74 under

Fair

Oklahoma County, Oklahoma · 6.1 MI N I-44 · Structure no. 228740000000000

Built
1991
34 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
185 ft
1 main span
Daily traffic
5,000
2022 count
Owner
State
State Highway Agency

About this bridge

NW 122nd St. over S.H. 74 under is a prestressed concrete box beam or girders - multiple carrying NW 122nd St. over S.H. 74 under in Oklahoma County, Oklahoma. It was built in 1991, so it is 34 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 5,000 vehicles a day, roughly 5% of them trucks, projected to reach 8,000 by 2042. The structure is 185 ft (56.4 m) long and 79 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNW 122nd St.
CrossesS.H. 74 under
Location6.1 MI N I-44
RouteCity Street 0
CountyOklahoma County
StateOklahoma
Coordinates35.59457, -97.58476
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length185 ft (56.4 m)
Longest span185 ft (56.4 m)
Deck width79 ft (24.1 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2022)
Projected traffic8,000 by 2042
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 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$5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was NW 122nd St. over S.H. 74 under built?

It was built in 1991, making it 34 years old in 2025.

What condition is NW 122nd St. over S.H. 74 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 March 2023.

How much traffic does NW 122nd St. over S.H. 74 under carry?

About 5,000 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is NW 122nd St. over S.H. 74 under?

The structure is 185 ft (56.4 m) long with a longest span of 185 ft (56.4 m) and a deck 79 ft wide.

Who owns NW 122nd St. over S.H. 74 under?

It is owned by the State Highway Agency.