State Route 121 over Tulucay Creek
FairNapa County, California · 04-NAP-121-6.42-NAP · Structure no. 21 0003
- Built
- 1918
- 107 years old, rebuilt 1944
- Condition
- Fair
- inspected April 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 45 ft
- 2 main spans
- Daily traffic
- 22,850
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 121 over Tulucay Creek is a concrete continuous tee beam carrying State Route 121 over Tulucay Creek in Napa County, California. It was built in 1918 and reconstructed in 1944, so it is 107 years old, older than the California average of 54.8 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 22,850 vehicles a day, roughly 4% of them trucks, projected to reach 19,791 by 2046. The structure is 45 ft (13.6 m) long and 72 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Tulucay Creek built?
It was built in 1918, making it 107 years old in 2025. It was reconstructed in 1944.
What condition is State Route 121 over Tulucay Creek 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 April 2024.
How much traffic does State Route 121 over Tulucay Creek carry?
About 22,850 vehicles per day (2009 count), of which roughly 4% are trucks.
How long is State Route 121 over Tulucay Creek?
The structure is 45 ft (13.6 m) long with a longest span of 21 ft (6.5 m) and a deck 72 ft wide.
Who owns State Route 121 over Tulucay Creek?
It is owned by the State Highway Agency.