US Bridges

U.S. 77 WB over I-35 under

Fair

Murray County, Oklahoma · 5.4 MI N Carter C/L · Structure no. 175790000000000

Built
1969
56 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
329 ft
3 main spans
Daily traffic
1,050
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 77 WB over I-35 under is a steel continuous stringer/multi-beam or girder carrying U.S. 77 WB over I-35 under in Murray County, Oklahoma. It was built in 1969, so it is 56 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 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 1,050 vehicles a day, roughly 15% of them trucks, projected to reach 1,680 by 2042. The structure is 329 ft (100.3 m) long and 48 ft wide.

CarriesU.S. 77 WB
CrossesI-35 under
Location5.4 MI N Carter C/L
RouteU.S. Route 77
Coordinates34.45028, -97.13556
Functional classRural Major Collector

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 inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating45.7 US tons
Inventory rating27.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadHS 20
Structure length329 ft (100.3 m)
Longest span111 ft (33.8 m)
Deck width48 ft (14.6 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2022)
Projected traffic1,680 by 2042
Trucks15%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$2.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was U.S. 77 WB over I-35 under built?

It was built in 1969, making it 56 years old in 2025.

What condition is U.S. 77 WB over I-35 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 February 2023.

How much traffic does U.S. 77 WB over I-35 under carry?

About 1,050 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is U.S. 77 WB over I-35 under?

The structure is 329 ft (100.3 m) long with a longest span of 111 ft (33.8 m) and a deck 48 ft wide.

Who owns U.S. 77 WB over I-35 under?

It is owned by the State Highway Agency.