US-1 NB (900125) over Cow Key Channel
GoodMonroe County, Florida · Key West (mm 4.1) · Structure no. 900086
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected December 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 361 ft
- 9 main spans
- Daily traffic
- 23,000
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US-1 NB (900125) over Cow Key Channel is a prestressed concrete slab carrying US-1 NB (900125) over Cow Key Channel in Monroe County, Florida. It was built in 1978, so it is 47 years old, older 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 23,000 vehicles a day, roughly 3% of them trucks, projected to reach 39,905 by 2044. The structure is 361 ft (109.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-1 NB (900125) over Cow Key Channel built?
It was built in 1978, making it 47 years old in 2025.
What condition is US-1 NB (900125) over Cow Key Channel 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 US-1 NB (900125) over Cow Key Channel carry?
About 23,000 vehicles per day (2024 count), of which roughly 3% are trucks.
How long is US-1 NB (900125) over Cow Key Channel?
The structure is 361 ft (109.9 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.
Who owns US-1 NB (900125) over Cow Key Channel?
It is owned by the State Highway Agency.