US Bridges

I-75 over Lambert Road

Fair

Rockcastle County, Kentucky · 2.1 MI Sou. of Madison Cl · Structure no. 102B00042N

Built
1967
58 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
47,638
2023 count
Owner
State
State Highway Agency

About this bridge

I-75 over Lambert Road is a concrete culvert carrying I-75 over Lambert Road in Rockcastle County, Kentucky. It was built in 1967, so it is 58 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 47,638 vehicles a day, roughly 26% of them trucks, projected to reach 59,071 by 2043. The structure is 23 ft (6.9 m) long. If it were closed, the detour would be 100 mi (161 km).

Location

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CarriesI-75
CrossesLambert Road
Location2.1 MI Sou. of Madison Cl
RouteInterstate 75
CountyRockcastle County
StateKentucky
Coordinates37.50694, -84.32444
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
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.6 US tons
Inventory rating53.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length23 ft (6.9 m)
Longest span20 ft (6.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,638 (2023)
Projected traffic59,071 by 2043
Trucks26%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed100 mi (161 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$57,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 over Lambert Road built?

It was built in 1967, making it 58 years old in 2025.

What condition is I-75 over Lambert 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 September 2024.

How much traffic does I-75 over Lambert Road carry?

About 47,638 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is I-75 over Lambert Road?

The structure is 23 ft (6.9 m) long with a longest span of 20 ft (6.2 m).

Who owns I-75 over Lambert Road?

It is owned by the State Highway Agency.