State Route 299 over Rock Creek
GoodModoc County, California · 02-MOD-299-37.16 · Structure no. 03 0007
- Built
- 1937
- 88 years old, rebuilt 1991
- Condition
- Good
- inspected August 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 29 ft
- 2 main spans
- Daily traffic
- 2,800
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 299 over Rock Creek is a concrete continuous culvert carrying State Route 299 over Rock Creek in Modoc County, California. It was built in 1937 and reconstructed in 1991, so it is 88 years old, older 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 2,800 vehicles a day, roughly 20% of them trucks, projected to reach 3,356 by 2040. The structure is 29 ft (8.9 m) long. If it were closed, the detour would be 14.9 mi (24 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 299 over Rock Creek built?
It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1991.
What condition is State Route 299 over Rock 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 August 2023.
How much traffic does State Route 299 over Rock Creek carry?
About 2,800 vehicles per day (2015 count), of which roughly 20% are trucks.
How long is State Route 299 over Rock Creek?
The structure is 29 ft (8.9 m) long with a longest span of 14 ft (4.3 m).
Who owns State Route 299 over Rock Creek?
It is owned by the State Highway Agency.