US Bridges

KY-56 over Unname Stream

FairPosted for load

McLean County, Kentucky · .1 MI W of JCT Ky 256 · Structure no. 075B00036N

Built
1930
95 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
43 ft
1 main span
Daily traffic
1,839
2020 count
Owner
State
State Highway Agency

About this bridge

KY-56 over Unname Stream is a concrete tee beam carrying KY-56 over Unname Stream in McLean County, Kentucky. It was built in 1930, so it is 95 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 1,839 vehicles a day, roughly 14% of them trucks, projected to reach 1,839 by 2040. The structure is 43 ft (13.1 m) long and 28 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
CarriesKY-56
CrossesUnname Stream
Location.1 MI W of JCT Ky 256
RouteState Highway 56
CountyMcLean County
StateKentucky
Coordinates37.61639, -87.40139
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 inspectionAugust 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.6 US tons
Inventory rating22.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length43 ft (13.1 m)
Longest span40 ft (12.2 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,839 (2020)
Projected traffic1,839 by 2040
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 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-56 over Unname Stream built?

It was built in 1930, making it 95 years old in 2025.

What condition is KY-56 over Unname Stream 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 August 2024.

How much traffic does KY-56 over Unname Stream carry?

About 1,839 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is KY-56 over Unname Stream?

The structure is 43 ft (13.1 m) long with a longest span of 40 ft (12.2 m) and a deck 28 ft wide.

Who owns KY-56 over Unname Stream?

It is owned by the State Highway Agency.