US Bridges

US-431 over South Fork of Red River

Fair

Logan County, Kentucky · .40 MI Sou. of JCT Ky 591 · Structure no. 071B00021N

Built
1933
92 years old
Condition
Fair
inspected October 2021
Type
Tee Beam
Concrete
Length
321 ft
6 main spans
Daily traffic
3,391
2023 count
Owner
State
State Highway Agency

About this bridge

US-431 over South Fork of Red River is a concrete tee beam carrying US-431 over South Fork of Red River in Logan County, Kentucky. It was built in 1933, so it is 92 years old, older than the Kentucky average of 46.6 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 3,391 vehicles a day, roughly 20% of them trucks, projected to reach 3,391 by 2043. The structure is 321 ft (97.7 m) long and 28 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

Location

Open in Google Maps
CarriesUS-431
CrossesSouth Fork of Red River
Location.40 MI Sou. of JCT Ky 591
RouteU.S. Route 431
CountyLogan County
StateKentucky
Coordinates36.66111, -86.85111
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.3 US tons
Inventory rating39.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length321 ft (97.7 m)
Longest span50 ft (15.2 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,391 (2023)
Projected traffic3,391 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$993,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US-431 over South Fork of Red River built?

It was built in 1933, making it 92 years old in 2025.

What condition is US-431 over South Fork of Red River 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 October 2021.

How much traffic does US-431 over South Fork of Red River carry?

About 3,391 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is US-431 over South Fork of Red River?

The structure is 321 ft (97.7 m) long with a longest span of 50 ft (15.2 m) and a deck 28 ft wide.

Who owns US-431 over South Fork of Red River?

It is owned by the State Highway Agency.