US Bridges

KY-66 over Big Creek

FairPosted for load

Clay County, Kentucky · .15 MI Nor. of JCT US 421 · Structure no. 026B00049N

Built
1958
67 years old
Condition
Fair
inspected October 2021
Type
Tee Beam
Concrete
Length
129 ft
3 main spans
Daily traffic
493
2023 count
Owner
State
State Highway Agency

About this bridge

KY-66 over Big Creek is a concrete tee beam carrying KY-66 over Big Creek in Clay County, Kentucky. It was built in 1958, so it is 67 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. Its operating status is: posted for load restriction.

It carries about 493 vehicles a day, projected to reach 493 by 2043. The structure is 129 ft (39.3 m) long and 28 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesKY-66
CrossesBig Creek
Location.15 MI Nor. of JCT US 421
RouteState Highway 66
CountyClay County
StateKentucky
Coordinates37.16583, -83.58083
Functional classRural Major 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length129 ft (39.3 m)
Longest span39 ft (11.8 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic493 (2023)
Projected traffic493 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-66 over Big Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is KY-66 over Big Creek 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 October 2021.

How much traffic does KY-66 over Big Creek carry?

About 493 vehicles per day (2023 count).

How long is KY-66 over Big Creek?

The structure is 129 ft (39.3 m) long with a longest span of 39 ft (11.8 m) and a deck 28 ft wide.

Who owns KY-66 over Big Creek?

It is owned by the State Highway Agency.