US Bridges

KY-120 over Unname Stream

FairPosted for load

Crittenden County, Kentucky · .10 MI East of JCT Ky 654 · Structure no. 028B00011N

Built
1931
94 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
42 ft
1 main span
Daily traffic
507
2023 count
Owner
State
State Highway Agency

About this bridge

KY-120 over Unname Stream is a concrete tee beam carrying KY-120 over Unname Stream in Crittenden County, Kentucky. It was built in 1931, so it is 94 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 507 vehicles a day, roughly 13% of them trucks, projected to reach 507 by 2043. The structure is 42 ft (12.9 m) long and 22 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesKY-120
CrossesUnname Stream
Location.10 MI East of JCT Ky 654
RouteState Highway 120
CountyCrittenden County
StateKentucky
Coordinates37.34833, -87.99056
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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.4 US tons
Inventory rating29.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length42 ft (12.9 m)
Longest span41 ft (12.6 m)
Deck width22 ft (6.7 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic507 (2023)
Projected traffic507 by 2043
Trucks13%
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$118,000
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-120 over Unname Stream built?

It was built in 1931, making it 94 years old in 2025.

What condition is KY-120 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 March 2024.

How much traffic does KY-120 over Unname Stream carry?

About 507 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is KY-120 over Unname Stream?

The structure is 42 ft (12.9 m) long with a longest span of 41 ft (12.6 m) and a deck 22 ft wide.

Who owns KY-120 over Unname Stream?

It is owned by the State Highway Agency.