US Bridges

NW 12th St. over I-44 under

Good

Oklahoma County, Oklahoma · 1.5 MI N I-40 · Structure no. 185750000000000

Built
1973
52 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
236 ft
2 main spans
Daily traffic
1,000
2022 count
Owner
State
State Highway Agency

About this bridge

NW 12th St. over I-44 under is a steel stringer/multi-beam or girder carrying NW 12th St. over I-44 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 1,000 vehicles a day, roughly 5% of them trucks, projected to reach 1,600 by 2042. The structure is 236 ft (71.9 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNW 12th St.
CrossesI-44 under
Location1.5 MI N I-40
RouteCity Street 0
CountyOklahoma County
StateOklahoma
Coordinates35.48228, -97.57797
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.7 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length236 ft (71.9 m)
Longest span122 ft (37.2 m)
Deck width39 ft (11.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2022)
Projected traffic1,600 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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$3.3 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was NW 12th St. over I-44 under built?

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

What condition is NW 12th St. over I-44 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 October 2023.

How much traffic does NW 12th St. over I-44 under carry?

About 1,000 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is NW 12th St. over I-44 under?

The structure is 236 ft (71.9 m) long with a longest span of 122 ft (37.2 m) and a deck 39 ft wide.

Who owns NW 12th St. over I-44 under?

It is owned by the State Highway Agency.