US Bridges

KY-307 over Overflow Structure

FairPosted for load

Carlisle County, Kentucky · 1.1 MI Sou. of JCT Ky 80 · Structure no. 020B00024N

Built
1948
77 years old
Condition
Fair
inspected January 2023
Type
Tee Beam
Concrete
Length
198 ft
6 main spans
Daily traffic
1,009
2022 count
Owner
State
State Highway Agency

About this bridge

KY-307 over Overflow Structure is a concrete tee beam carrying KY-307 over Overflow Structure in Carlisle County, Kentucky. It was built in 1948, so it is 77 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 1,009 vehicles a day, roughly 21% of them trucks, projected to reach 1,009 by 2042. The structure is 198 ft (60.4 m) long and 26 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesKY-307
CrossesOverflow Structure
Location1.1 MI Sou. of JCT Ky 80
RouteState Highway 307
CountyCarlisle County
StateKentucky
Coordinates36.78056, -88.86444
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
Deck7 GoodSome minor problems.
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 protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.7 US tons
Inventory rating37.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length198 ft (60.4 m)
Longest span33 ft (10.1 m)
Deck width26 ft (7.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,009 (2022)
Projected traffic1,009 by 2042
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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-307 over Overflow Structure built?

It was built in 1948, making it 77 years old in 2025.

What condition is KY-307 over Overflow Structure 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 2023.

How much traffic does KY-307 over Overflow Structure carry?

About 1,009 vehicles per day (2022 count), of which roughly 21% are trucks.

How long is KY-307 over Overflow Structure?

The structure is 198 ft (60.4 m) long with a longest span of 33 ft (10.1 m) and a deck 26 ft wide.

Who owns KY-307 over Overflow Structure?

It is owned by the State Highway Agency.