US Bridges

4630C over Lake Eufaula

FairPosted for load

McIntosh County, Oklahoma · 3S;.7E of Vivian · Structure no. 170300000000000

Built
1967
58 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
391 ft
3 main spans
Daily traffic
149
2022 count
Owner
County
County Highway Agency

About this bridge

4630C over Lake Eufaula is a steel continuous stringer/multi-beam or girder carrying 4630C over Lake Eufaula in McIntosh County, Oklahoma. It was built in 1967, so it is 58 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. Its operating status is: posted for load restriction.

It carries about 149 vehicles a day, roughly 15% of them trucks, projected to reach 238 by 2042. The structure is 391 ft (119.2 m) long and 27 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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Carries4630C
CrossesLake Eufaula
Location3S;.7E of Vivian
RouteCounty Highway 4630C
CountyMcIntosh County
StateOklahoma
Coordinates35.24502, -95.70852
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length391 ft (119.2 m)
Longest span148 ft (45.1 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic149 (2022)
Projected traffic238 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was 4630C over Lake Eufaula built?

It was built in 1967, making it 58 years old in 2025.

What condition is 4630C over Lake Eufaula 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 September 2023.

How much traffic does 4630C over Lake Eufaula carry?

About 149 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 4630C over Lake Eufaula?

The structure is 391 ft (119.2 m) long with a longest span of 148 ft (45.1 m) and a deck 27 ft wide.

Who owns 4630C over Lake Eufaula?

It is owned by the County Highway Agency.