State Route 299 over Hillside
GoodHumboldt County, California · 01-HUM-299-R42.30 · Structure no. 04 0217
- Built
- 1966
- 59 years old
- Condition
- Good
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 97 ft
- 1 main span
- Daily traffic
- 4,400
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 299 over Hillside is a steel stringer/multi-beam or girder carrying State Route 299 over Hillside in Humboldt County, California. It was built in 1966, so it is 59 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 4,400 vehicles a day, roughly 15% of them trucks, projected to reach 5,628 by 2045. The structure is 97 ft (29.6 m) long and 14 ft wide. If it were closed, the detour would be 123.7 mi (199 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 299 over Hillside built?
It was built in 1966, making it 59 years old in 2025.
What condition is State Route 299 over Hillside 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 January 2025.
How much traffic does State Route 299 over Hillside carry?
About 4,400 vehicles per day (2009 count), of which roughly 15% are trucks.
How long is State Route 299 over Hillside?
The structure is 97 ft (29.6 m) long with a longest span of 94 ft (28.7 m) and a deck 14 ft wide.
Who owns State Route 299 over Hillside?
It is owned by the State Highway Agency.