US Bridges

KY-511 over I-75 @ 18.970

Fair

Whitley County, Kentucky · .80 MI W of JCT Ky 836 · Structure no. 118B00010N

Built
1967
58 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
257 ft
4 main spans
Daily traffic
389
2021 count
Owner
State
State Highway Agency

About this bridge

KY-511 over I-75 @ 18.970 is a concrete continuous tee beam carrying KY-511 over I-75 @ 18.970 in Whitley 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 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 389 vehicles a day, projected to reach 389 by 2041. The structure is 257 ft (78.3 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesKY-511
CrossesI-75 @ 18.970
Location.80 MI W of JCT Ky 836
RouteState Highway 511
CountyWhitley County
StateKentucky
Coordinates36.84306, -84.16083
Functional classRural Minor Collector

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.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.3 US tons
Inventory rating38 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length257 ft (78.3 m)
Longest span73 ft (22.3 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic389 (2021)
Projected traffic389 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was KY-511 over I-75 @ 18.970 built?

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

What condition is KY-511 over I-75 @ 18.970 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 March 2023.

How much traffic does KY-511 over I-75 @ 18.970 carry?

About 389 vehicles per day (2021 count).

How long is KY-511 over I-75 @ 18.970?

The structure is 257 ft (78.3 m) long with a longest span of 73 ft (22.3 m) and a deck 30 ft wide.

Who owns KY-511 over I-75 @ 18.970?

It is owned by the State Highway Agency.