US Bridges

US-42 over I 71; I 75

FairPosted for load

Boone County, Kentucky · 1 MI SW of JCT US 25 · Structure no. 008B00005R

Built
1960
65 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete Continuous
Length
327 ft
4 main spans
Daily traffic
14,841
2019 count
Owner
State
State Highway Agency

About this bridge

US-42 over I 71; I 75 is a concrete continuous tee beam carrying US-42 over I 71; I 75 in Boone County, Kentucky. It was built in 1960, so it is 65 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. Its operating status is: posted for load restriction.

It carries about 14,841 vehicles a day, roughly 3% of them trucks, projected to reach 14,841 by 2039. The structure is 327 ft (99.7 m) long and 37 ft wide.

CarriesUS-42
CrossesI 71; I 75
Location1 MI SW of JCT US 25
RouteU.S. Route 42
Coordinates38.985, -84.64167
Functional classUrban Other Principal Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length327 ft (99.7 m)
Longest span102 ft (31.1 m)
Deck width37 ft (11.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,841 (2019)
Projected traffic14,841 by 2039
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 US-42 over I 71; I 75 built?

It was built in 1960, making it 65 years old in 2025.

What condition is US-42 over I 71; I 75 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 US-42 over I 71; I 75 carry?

About 14,841 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is US-42 over I 71; I 75?

The structure is 327 ft (99.7 m) long with a longest span of 102 ft (31.1 m) and a deck 37 ft wide.

Who owns US-42 over I 71; I 75?

It is owned by the State Highway Agency.