US Bridges

I-65 NB over Salt River

Fair

Bullitt County, Kentucky · 0.5 MI S of Ky 44 · Structure no. 015B00040R

Built
1956
69 years old, rebuilt 1986
Condition
Fair
inspected August 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
585 ft
5 main spans
Daily traffic
45,726
2022 count
Owner
State
State Highway Agency

About this bridge

I-65 NB over Salt River is a steel continuous girder and floorbeam system carrying I-65 NB over Salt River in Bullitt County, Kentucky. It was built in 1956 and reconstructed in 1986, so it is 69 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 45,726 vehicles a day, roughly 21% of them trucks, projected to reach 50,299 by 2042. The structure is 585 ft (178.3 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-65 NB
CrossesSalt River
Location0.5 MI S of Ky 44
RouteInterstate 65
CountyBullitt County
StateKentucky
Coordinates37.98556, -85.70083
Functional classUrban Principal Arterial - Interstate

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.9 US tons
Inventory rating30.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length585 ft (178.3 m)
Longest span165 ft (50.3 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,726 (2022)
Projected traffic50,299 by 2042
Trucks21%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-65 NB over Salt River built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1986.

What condition is I-65 NB 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 August 2024.

How much traffic does I-65 NB over Salt River carry?

About 45,726 vehicles per day (2022 count), of which roughly 21% are trucks.

How long is I-65 NB over Salt River?

The structure is 585 ft (178.3 m) long with a longest span of 165 ft (50.3 m) and a deck 59 ft wide.

Who owns I-65 NB over Salt River?

It is owned by the State Highway Agency.