SR 121 over Sarco Creek
GoodNapa County, California · 04-NAP-121-9.30 · Structure no. 21 0117
- Built
- 2018
- 7 years old
- Condition
- Good
- inspected April 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 49 ft
- 1 main span
- Daily traffic
- 12,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
SR 121 over Sarco Creek is a prestressed concrete slab carrying SR 121 over Sarco Creek in Napa County, California. It was built in 2018, so it is 7 years old, younger than the California average of 54.8 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 12,000 vehicles a day, roughly 4% of them trucks, projected to reach 17,635 by 2046. The structure is 49 ft (14.8 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 121 over Sarco Creek built?
It was built in 2018, making it 7 years old in 2025.
What condition is SR 121 over Sarco Creek 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 SR 121 over Sarco Creek carry?
About 12,000 vehicles per day (2009 count), of which roughly 4% are trucks.
How long is SR 121 over Sarco Creek?
The structure is 49 ft (14.8 m) long with a longest span of 43 ft (13.2 m) and a deck 44 ft wide.
Who owns SR 121 over Sarco Creek?
It is owned by the State Highway Agency.