I20 over SR21
GoodCalhoun County, Alabama · Intersect. SR21 and I20 · Structure no. 020185
- Built
- 2012
- 13 years old
- Condition
- Good
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 315 ft
- 3 main spans
- Daily traffic
- 21,558
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
I20 over SR21 is a prestressed concrete stringer/multi-beam or girder carrying I20 over SR21 in Calhoun County, Alabama. It was built in 2012, so it is 13 years old, younger than the Alabama average of 51.1 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 21,558 vehicles a day, roughly 38% of them trucks, projected to reach 30,181 by 2041. The structure is 315 ft (96 m) long and 74 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I20 over SR21 built?
It was built in 2012, making it 13 years old in 2025.
What condition is I20 over SR21 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.
How much traffic does I20 over SR21 carry?
About 21,558 vehicles per day (2021 count), of which roughly 38% are trucks.
How long is I20 over SR21?
The structure is 315 ft (96 m) long with a longest span of 100 ft (30.5 m) and a deck 74 ft wide.
Who owns I20 over SR21?
It is owned by the State Highway Agency.