US Bridges

KY-3478 over Robinson Creek

PoorPosted for load

Clay County, Kentucky · .1 MI S of JCT US 421 · Structure no. 026B00102N

Built
1967
58 years old
Condition
Poor
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
2 main spans
Daily traffic
236
2023 count
Owner
State
State Highway Agency

About this bridge

KY-3478 over Robinson Creek is a prestressed concrete box beam or girders - multiple carrying KY-3478 over Robinson Creek in Clay County, Kentucky. It was built in 1967, so it is 58 years old, older than the Kentucky average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 236 vehicles a day, projected to reach 236 by 2043. The structure is 60 ft (18.3 m) long and 21 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesKY-3478
CrossesRobinson Creek
Location.1 MI S of JCT US 421
RouteState Highway 3478
CountyClay County
StateKentucky
Coordinates37.27694, -83.8425
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating28.5 US tons
Inventory rating17.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span28 ft (8.5 m)
Deck width21 ft (6.5 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic236 (2023)
Projected traffic236 by 2043
Trucks0%
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$160,000
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-3478 over Robinson Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is KY-3478 over Robinson Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does KY-3478 over Robinson Creek carry?

About 236 vehicles per day (2023 count).

How long is KY-3478 over Robinson Creek?

The structure is 60 ft (18.3 m) long with a longest span of 28 ft (8.5 m) and a deck 21 ft wide.

Who owns KY-3478 over Robinson Creek?

It is owned by the State Highway Agency.