US Bridges

I-75 over Rock Quarry Road

Fair

Fayette County, Kentucky · .50 MI S of US 25&421 Op · Structure no. 034B00075N

Built
1963
62 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
73,202
2023 count
Owner
State
State Highway Agency

About this bridge

I-75 over Rock Quarry Road is a concrete tee beam carrying I-75 over Rock Quarry Road in Fayette County, Kentucky. It was built in 1963, so it is 62 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 73,202 vehicles a day, roughly 16% of them trucks, projected to reach 90,770 by 2043. The structure is 28 ft (8.4 m) long and 158 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesI-75
CrossesRock Quarry Road
Location.50 MI S of US 25&421 Op
RouteInterstate 75
CountyFayette County
StateKentucky
Coordinates37.9175, -84.36667
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.4 US tons
Inventory rating39.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length28 ft (8.4 m)
Longest span26 ft (7.8 m)
Deck width158 ft (48.2 m)
Roadway width120 ft (36.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic73,202 (2023)
Projected traffic90,770 by 2043
Trucks16%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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$70,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 over Rock Quarry Road built?

It was built in 1963, making it 62 years old in 2025.

What condition is I-75 over Rock Quarry 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 May 2023.

How much traffic does I-75 over Rock Quarry Road carry?

About 73,202 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I-75 over Rock Quarry Road?

The structure is 28 ft (8.4 m) long with a longest span of 26 ft (7.8 m) and a deck 158 ft wide.

Who owns I-75 over Rock Quarry Road?

It is owned by the State Highway Agency.