CR121A (middle Rd) over Little St. Marys River
FairNassau County, Florida · 0.6 MI North of CR 108 · Structure no. 740042
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected June 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 181 ft
- 6 main spans
- Daily traffic
- 600
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
CR121A (middle Rd) over Little St. Marys River is a prestressed concrete slab carrying CR121A (middle Rd) over Little St. Marys River in Nassau County, Florida. It was built in 1969, so it is 56 years old, older than the Florida average of 41.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 600 vehicles a day, roughly 5% of them trucks, projected to reach 1,041 by 2046. The structure is 181 ft (55.3 m) long and 29 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was CR121A (middle Rd) over Little St. Marys River built?
It was built in 1969, making it 56 years old in 2025.
What condition is CR121A (middle Rd) over Little St. Marys River 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 June 2024.
How much traffic does CR121A (middle Rd) over Little St. Marys River carry?
About 600 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is CR121A (middle Rd) over Little St. Marys River?
The structure is 181 ft (55.3 m) long with a longest span of 31 ft (9.3 m) and a deck 29 ft wide.
Who owns CR121A (middle Rd) over Little St. Marys River?
It is owned by the County Highway Agency.