US Bridges

KY-624 over Unname Stream

Fair

Trigg County, Kentucky · 1.0 MI East of JCT Ky 124 · Structure no. 111B00035N

Built
1950
75 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
255
2020 count
Owner
State
State Highway Agency

About this bridge

KY-624 over Unname Stream is a concrete culvert carrying KY-624 over Unname Stream in Trigg County, Kentucky. It was built in 1950, so it is 75 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.

It carries about 255 vehicles a day, projected to reach 255 by 2040. The structure is 21 ft (6.4 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesKY-624
CrossesUnname Stream
Location1.0 MI East of JCT Ky 124
RouteState Highway 624
CountyTrigg County
StateKentucky
Coordinates36.96028, -87.69194
Functional classRural Minor 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating60 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length21 ft (6.4 m)
Longest span10 ft (3.1 m)
Deck width26 ft (7.9 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic255 (2020)
Projected traffic255 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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-624 over Unname Stream built?

It was built in 1950, making it 75 years old in 2025.

What condition is KY-624 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 June 2024.

How much traffic does KY-624 over Unname Stream carry?

About 255 vehicles per day (2020 count).

How long is KY-624 over Unname Stream?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3.1 m) and a deck 26 ft wide.

Who owns KY-624 over Unname Stream?

It is owned by the State Highway Agency.