U.S. 77 EB over I-35 under

Fair

Murray County, Oklahoma · 5.3 MI N Carter C/L · Structure no. 175780000000000

Built: 1969; 56 years old
Condition: Fair; inspected February 2023
Type: Stringer/Multi-beam or Girder; Steel Continuous
Length: 325 ft; 3 main spans
Daily traffic: 1,050; 2022 count
Owner: State; State Highway Agency

About this bridge

U.S. 77 EB over I-35 under is a steel continuous stringer/multi-beam or girder carrying U.S. 77 EB 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 325 ft (99.1 m) long and 40 ft wide.

Location

No coordinates are recorded for this structure.

CarriesU.S. 77 EB

CrossesI-35 under

Location5.3 MI N Carter C/L

RouteU.S. Route 77

CountyMurray County

StateOklahoma

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.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	7 Good	Some minor problems.
Substructure	6 Satisfactory	Structural 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 geometry7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating53.4 US tons

Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder

MaterialSteel Continuous

DeckConcrete, cast-in-place

Main spans3 (+1 approach)

Design loadHS 20

Structure length325 ft (99.1 m)

Longest span110 ft (33.5 m)

Deck width40 ft (12.1 m)

Roadway width38 ft (11.6 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2022)

Projected traffic1,680 by 2042

Trucks15%

Lanes on structure2

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 EB over I-35 under built?

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

What condition is U.S. 77 EB 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 EB 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 EB over I-35 under?

The structure is 325 ft (99.1 m) long with a longest span of 110 ft (33.5 m) and a deck 40 ft wide.

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

It is owned by the State Highway Agency.