State Route 29 over Garnett Creek
PoorNapa County, California · 04-NAP-029-39.08 · Structure no. 21 0005
- Built
- 1902
- 123 years old, rebuilt 1955
- Condition
- Poor
- inspected April 2023
- Type
- Arch - Deck
- Masonry
- Length
- 76 ft
- 3 main spans
- Daily traffic
- 12,000
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 29 over Garnett Creek is a masonry arch - deck carrying State Route 29 over Garnett Creek in Napa County, California. It was built in 1902 and reconstructed in 1955, so it is 123 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 12,000 vehicles a day, roughly 6% of them trucks, projected to reach 15,600 by 2040. The structure is 76 ft (23.1 m) long and 23 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 29 over Garnett Creek built?
It was built in 1902, making it 123 years old in 2025. It was reconstructed in 1955.
What condition is State Route 29 over Garnett Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.
How much traffic does State Route 29 over Garnett Creek carry?
About 12,000 vehicles per day (2017 count), of which roughly 6% are trucks.
How long is State Route 29 over Garnett Creek?
The structure is 76 ft (23.1 m) long with a longest span of 29 ft (8.8 m) and a deck 23 ft wide.
Who owns State Route 29 over Garnett Creek?
It is owned by the State Highway Agency.