US Bridges

I-75 over Sandy Flat Road

Fair

Whitley County, Kentucky · Nbl 1.9 MI N of Tenn ST L · Structure no. 118B00054R

Built
1962
63 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Concrete
Length
99 ft
3 main spans
Daily traffic
16,501
2023 count
Owner
State
State Highway Agency

About this bridge

I-75 over Sandy Flat Road is a concrete tee beam carrying I-75 over Sandy Flat Road in Whitley County, Kentucky. It was built in 1962, so it is 63 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 16,501 vehicles a day, roughly 31% of them trucks, projected to reach 20,461 by 2043. The structure is 99 ft (30.2 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-75
CrossesSandy Flat Road
LocationNbl 1.9 MI N of Tenn ST L
RouteInterstate 75
CountyWhitley County
StateKentucky
Coordinates36.61833, -84.10639
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating83.1 US tons
Inventory rating49.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length99 ft (30.2 m)
Longest span33 ft (10.1 m)
Deck width46 ft (13.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,501 (2023)
Projected traffic20,461 by 2043
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$543,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 over Sandy Flat Road built?

It was built in 1962, making it 63 years old in 2025.

What condition is I-75 over Sandy Flat Road 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 I-75 over Sandy Flat Road carry?

About 16,501 vehicles per day (2023 count), of which roughly 31% are trucks.

How long is I-75 over Sandy Flat Road?

The structure is 99 ft (30.2 m) long with a longest span of 33 ft (10.1 m) and a deck 46 ft wide.

Who owns I-75 over Sandy Flat Road?

It is owned by the State Highway Agency.