KY-21 over I-75
FairMadison County, Kentucky · .5 MI W JCT US 25 · Structure no. 076B00107N
- Built
- 2002
- 23 years old
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 256 ft
- 4 main spans
- Daily traffic
- 13,303
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
KY-21 over I-75 is a prestressed concrete continuous stringer/multi-beam or girder carrying KY-21 over I-75 in Madison County, Kentucky. It was built in 2002, so it is 23 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 13,303 vehicles a day, roughly 6% of them trucks, projected to reach 13,303 by 2042. The structure is 256 ft (78.1 m) long and 98 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was KY-21 over I-75 built?
It was built in 2002, making it 23 years old in 2025.
What condition is KY-21 over I-75 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 April 2024.
How much traffic does KY-21 over I-75 carry?
About 13,303 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is KY-21 over I-75?
The structure is 256 ft (78.1 m) long with a longest span of 84 ft (25.7 m) and a deck 98 ft wide.
Who owns KY-21 over I-75?
It is owned by the State Highway Agency.