SR-21 over Lake Brooklyn
GoodClay County, Florida · 0.9 Mi. N. of SR-100 · Structure no. 710063
- Built
- 1992
- 33 years old
- Condition
- Good
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 150 ft
- 3 main spans
- Daily traffic
- 10,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR-21 over Lake Brooklyn is a prestressed concrete stringer/multi-beam or girder carrying SR-21 over Lake Brooklyn in Clay County, Florida. It was built in 1992, so it is 33 years old, younger than the Florida average of 41.3 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 10,500 vehicles a day, roughly 11% of them trucks, projected to reach 18,218 by 2045. The structure is 150 ft (45.7 m) long and 47 ft wide. If it were closed, the detour would be 11.8 mi (19 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. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR-21 over Lake Brooklyn built?
It was built in 1992, making it 33 years old in 2025.
What condition is SR-21 over Lake Brooklyn 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 December 2024.
How much traffic does SR-21 over Lake Brooklyn carry?
About 10,500 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is SR-21 over Lake Brooklyn?
The structure is 150 ft (45.7 m) long with a longest span of 50 ft (15.2 m) and a deck 47 ft wide.
Who owns SR-21 over Lake Brooklyn?
It is owned by the State Highway Agency.