US Bridges

KY-3478 over Robinson Creek

Fair

Clay County, Kentucky · .6 MI W US 421 · Structure no. 026B00103N

Built
1952
73 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
166
2021 count
Owner
State
State Highway Agency

About this bridge

KY-3478 over Robinson Creek is a concrete culvert carrying KY-3478 over Robinson Creek in Clay 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 166 vehicles a day, projected to reach 166 by 2041. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesKY-3478
CrossesRobinson Creek
Location.6 MI W US 421
RouteState Highway 3478
CountyClay County
StateKentucky
Coordinates37.27222, -83.85028
Functional classRural Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic166 (2021)
Projected traffic166 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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-3478 over Robinson Creek built?

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

What condition is KY-3478 over Robinson Creek 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-3478 over Robinson Creek carry?

About 166 vehicles per day (2021 count).

How long is KY-3478 over Robinson Creek?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m).

Who owns KY-3478 over Robinson Creek?

It is owned by the State Highway Agency.