US Bridges

US 31W (dixie Hwy) over Salt River

Fair

Jefferson County, Kentucky · At Hardin Cl · Structure no. 056B00034N

Built
1943
82 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
877 ft
7 main spans
Daily traffic
21,821
2018 count
Owner
State
State Highway Agency

About this bridge

US 31W (dixie Hwy) over Salt River is a steel continuous stringer/multi-beam or girder carrying US 31W (dixie Hwy) over Salt River in Jefferson County, Kentucky. It was built in 1943, so it is 82 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 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 21,821 vehicles a day, roughly 9% of them trucks, projected to reach 21,821 by 2038. The structure is 877 ft (267.3 m) long and 55 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesUS 31W (dixie Hwy)
CrossesSalt River
LocationAt Hardin Cl
RouteU.S. Route 31
Coordinates38.00111, -85.9425
Functional classRural Principal Arterial - Other

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating88.2 US tons
Inventory rating52.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadH 20
Structure length877 ft (267.3 m)
Longest span200 ft (61 m)
Deck width55 ft (16.8 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,821 (2018)
Projected traffic21,821 by 2038
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemYes

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$5.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US 31W (dixie Hwy) over Salt River built?

It was built in 1943, making it 82 years old in 2025.

What condition is US 31W (dixie Hwy) over Salt 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 September 2024.

How much traffic does US 31W (dixie Hwy) over Salt River carry?

About 21,821 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is US 31W (dixie Hwy) over Salt River?

The structure is 877 ft (267.3 m) long with a longest span of 200 ft (61 m) and a deck 55 ft wide.

Who owns US 31W (dixie Hwy) over Salt River?

It is owned by the State Highway Agency.