US Bridges

I-75 over Over Rockcastle River

Fair

Laurel County, Kentucky · 4.8 MI North JCT US25 · Structure no. 063B00114N

Built
2005
20 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
846 ft
5 main spans
Daily traffic
39,651
2021 count
Owner
State
State Highway Agency

About this bridge

I-75 over Over Rockcastle River is a steel continuous stringer/multi-beam or girder carrying I-75 over Over Rockcastle River in Laurel County, Kentucky. It was built in 2005, so it is 20 years old, younger 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 39,651 vehicles a day, roughly 37% of them trucks, projected to reach 49,167 by 2041. The structure is 846 ft (258 m) long and 128 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI-75
CrossesOver Rockcastle River
Location4.8 MI North JCT US25
RouteInterstate 75
CountyLaurel County
StateKentucky
Coordinates37.24028, -84.23917
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.6 US tons
Inventory rating53.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length846 ft (258 m)
Longest span200 ft (61 m)
Deck width128 ft (39 m)
Roadway width122 ft (37.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,651 (2021)
Projected traffic49,167 by 2041
Trucks37%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.9 mi (3 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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-75 over Over Rockcastle River built?

It was built in 2005, making it 20 years old in 2025.

What condition is I-75 over Over Rockcastle 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 July 2024.

How much traffic does I-75 over Over Rockcastle River carry?

About 39,651 vehicles per day (2021 count), of which roughly 37% are trucks.

How long is I-75 over Over Rockcastle River?

The structure is 846 ft (258 m) long with a longest span of 200 ft (61 m) and a deck 128 ft wide.

Who owns I-75 over Over Rockcastle River?

It is owned by the State Highway Agency.