US Bridges

U.S. 64 / S.H. 51 over 21st St. under

Fair

Tulsa County, Oklahoma · 1.8 MI E Peoria Ave · Structure no. 173030000000000

Built
1968
57 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
178 ft
4 main spans
Daily traffic
42,850
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 64 / S.H. 51 over 21st St. under is a steel stringer/multi-beam or girder carrying U.S. 64 / S.H. 51 over 21st St. under in Tulsa County, Oklahoma. It was built in 1968, so it is 57 years old, older 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 5 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 42,850 vehicles a day, roughly 8% of them trucks, projected to reach 68,560 by 2042. The structure is 178 ft (54.3 m) long and 51 ft wide.

Location

Open in Google Maps
CarriesU.S. 64 / S.H. 51
Crosses21st St. under
Location1.8 MI E Peoria Ave
RouteU.S. Route 64
CountyTulsa County
StateOklahoma
Coordinates36.13348, -95.94884
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
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 alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length178 ft (54.3 m)
Longest span46 ft (14 m)
Deck width51 ft (15.6 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,850 (2022)
Projected traffic68,560 by 2042
Trucks8%
Lanes on structure3
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$3.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was U.S. 64 / S.H. 51 over 21st St. under built?

It was built in 1968, making it 57 years old in 2025.

What condition is U.S. 64 / S.H. 51 over 21st St. 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 August 2024.

How much traffic does U.S. 64 / S.H. 51 over 21st St. under carry?

About 42,850 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is U.S. 64 / S.H. 51 over 21st St. under?

The structure is 178 ft (54.3 m) long with a longest span of 46 ft (14 m) and a deck 51 ft wide.

Who owns U.S. 64 / S.H. 51 over 21st St. under?

It is owned by the State Highway Agency.