US Bridges

KY-473 over Unname Stream

Fair

Ballard County, Kentucky · .70 MI Sou. of JCT US 60 · Structure no. 004B00041N

Built
1952
73 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
35 ft
2 main spans
Daily traffic
121
2023 count
Owner
State
State Highway Agency

About this bridge

KY-473 over Unname Stream is a concrete culvert carrying KY-473 over Unname Stream in Ballard County, Kentucky. It was built in 1952, so it is 73 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 121 vehicles a day, projected to reach 121 by 2043. The structure is 35 ft (10.8 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesKY-473
CrossesUnname Stream
Location.70 MI Sou. of JCT US 60
RouteState Highway 473
CountyBallard County
StateKentucky
Coordinates37.07056, -88.88667
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum 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 length35 ft (10.8 m)
Longest span17 ft (5.2 m)
Deck width23 ft (7.1 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic121 (2023)
Projected traffic121 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-473 over Unname Stream built?

It was built in 1952, making it 73 years old in 2025.

What condition is KY-473 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 July 2023.

How much traffic does KY-473 over Unname Stream carry?

About 121 vehicles per day (2023 count).

How long is KY-473 over Unname Stream?

The structure is 35 ft (10.8 m) long with a longest span of 17 ft (5.2 m) and a deck 23 ft wide.

Who owns KY-473 over Unname Stream?

It is owned by the State Highway Agency.