US-42 over Big South Fork
FairGallatin County, Kentucky · .35 MI S.W. of Boone Cl · Structure no. 039B00033N
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected July 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 87 ft
- 1 main span
- Daily traffic
- 4,209
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US-42 over Big South Fork is a prestressed concrete stringer/multi-beam or girder carrying US-42 over Big South Fork in Gallatin County, Kentucky. It was built in 1980, so it is 45 years old, younger 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 4,209 vehicles a day, roughly 17% of them trucks, projected to reach 4,209 by 2041. The structure is 87 ft (26.6 m) long and 43 ft wide. If it were closed, the detour would be 14.9 mi (24 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-42 over Big South Fork built?
It was built in 1980, making it 45 years old in 2025.
What condition is US-42 over Big South Fork 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 2021.
How much traffic does US-42 over Big South Fork carry?
About 4,209 vehicles per day (2021 count), of which roughly 17% are trucks.
How long is US-42 over Big South Fork?
The structure is 87 ft (26.6 m) long with a longest span of 80 ft (24.4 m) and a deck 43 ft wide.
Who owns US-42 over Big South Fork?
It is owned by the State Highway Agency.