US Bridges

KY-666 over Clements Branch

Fair

Union County, Kentucky · 1.0 MI S.E. of JCT Ky 360 · Structure no. 113B00082N

Built
1979
46 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
92 ft
3 main spans
Daily traffic
159
2021 count
Owner
State
State Highway Agency

About this bridge

KY-666 over Clements Branch is a prestressed concrete box beam or girders - multiple carrying KY-666 over Clements Branch in Union County, Kentucky. It was built in 1979, so it is 46 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 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 159 vehicles a day, projected to reach 159 by 2041. The structure is 92 ft (28 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesKY-666
CrossesClements Branch
Location1.0 MI S.E. of JCT Ky 360
RouteState Highway 666
CountyUnion County
StateKentucky
Coordinates37.74083, -87.95
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.1 US tons
Inventory rating58.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length92 ft (28 m)
Longest span35 ft (10.7 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic159 (2021)
Projected traffic159 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-666 over Clements Branch built?

It was built in 1979, making it 46 years old in 2025.

What condition is KY-666 over Clements Branch 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 January 2024.

How much traffic does KY-666 over Clements Branch carry?

About 159 vehicles per day (2021 count).

How long is KY-666 over Clements Branch?

The structure is 92 ft (28 m) long with a longest span of 35 ft (10.7 m) and a deck 24 ft wide.

Who owns KY-666 over Clements Branch?

It is owned by the State Highway Agency.