US Bridges

I-75 Ramp over NB & SB I-75 & Ky 18 Ram

Fair

Boone County, Kentucky · Nb&sb I75 & Ky 18 Ramp · Structure no. 008B00073N

Built
1990
35 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
640 ft
4 main spans
Daily traffic
6,478
2021 count
Owner
State
State Highway Agency

About this bridge

I-75 Ramp over NB & SB I-75 & Ky 18 Ram is a steel continuous stringer/multi-beam or girder carrying I-75 Ramp over NB & SB I-75 & Ky 18 Ram in Boone County, Kentucky. It was built in 1990, so it is 35 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 6,478 vehicles a day, roughly 3% of them trucks, projected to reach 7,125 by 2041. The structure is 640 ft (195.1 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-75 Ramp
CrossesNB & SB I-75 & Ky 18 Ram
LocationNb&sb I75 & Ky 18 Ramp
RouteInterstate 75
CountyBoone County
StateKentucky
Coordinates38.99111, -84.64389
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.2 US tons
Inventory rating28.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length640 ft (195.1 m)
Longest span180 ft (54.9 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,478 (2021)
Projected traffic7,125 by 2041
Trucks3%
Lanes on structure1
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I-75 Ramp over NB & SB I-75 & Ky 18 Ram built?

It was built in 1990, making it 35 years old in 2025.

What condition is I-75 Ramp over NB & SB I-75 & Ky 18 Ram 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 June 2023.

How much traffic does I-75 Ramp over NB & SB I-75 & Ky 18 Ram carry?

About 6,478 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is I-75 Ramp over NB & SB I-75 & Ky 18 Ram?

The structure is 640 ft (195.1 m) long with a longest span of 180 ft (54.9 m) and a deck 29 ft wide.

Who owns I-75 Ramp over NB & SB I-75 & Ky 18 Ram?

It is owned by the State Highway Agency.