State Route 121 over Huichica Creek
GoodNapa County, California · 04-NAP-121-0.75 · Structure no. 21 0118
- Built
- 2022
- 3 years old
- Condition
- Good
- inspected April 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 46 ft
- 1 main span
- Daily traffic
- 27,300
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 121 over Huichica Creek is a prestressed concrete slab carrying State Route 121 over Huichica Creek in Napa County, California. It was built in 2022, so it is 3 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 27,300 vehicles a day, roughly 3% of them trucks, projected to reach 35,500 by 2042. The structure is 46 ft (14 m) long and 44 ft wide. If it were closed, the detour would be 10.6 mi (17 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 121 over Huichica Creek built?
It was built in 2022, making it 3 years old in 2025.
What condition is State Route 121 over Huichica 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 State Route 121 over Huichica Creek carry?
About 27,300 vehicles per day (2019 count), of which roughly 3% are trucks.
How long is State Route 121 over Huichica Creek?
The structure is 46 ft (14 m) long with a longest span of 42 ft (12.9 m) and a deck 44 ft wide.
Who owns State Route 121 over Huichica Creek?
It is owned by the State Highway Agency.