U.S. Highway 101 over Hillside Above River
GoodMendocino County, California · 01-MEN-101-2.47 · Structure no. 10 0268
- Built
- 1989
- 36 years old
- Condition
- Good
- inspected April 2023
- Type
- Slab
- Concrete Continuous
- Length
- 352 ft
- 14 main spans
- Daily traffic
- 13,300
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Hillside Above River is a concrete continuous slab carrying U.S. Highway 101 over Hillside Above River in Mendocino County, California. It was built in 1989, so it is 36 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 13,300 vehicles a day, roughly 11% of them trucks, projected to reach 22,501 by 2043. The structure is 352 ft (107.4 m) long and 22 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 U.S. Highway 101 over Hillside Above River built?
It was built in 1989, making it 36 years old in 2025.
What condition is U.S. Highway 101 over Hillside Above River 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 2023.
How much traffic does U.S. Highway 101 over Hillside Above River carry?
About 13,300 vehicles per day (2009 count), of which roughly 11% are trucks.
How long is U.S. Highway 101 over Hillside Above River?
The structure is 352 ft (107.4 m) long with a longest span of 26 ft (7.9 m) and a deck 22 ft wide.
Who owns U.S. Highway 101 over Hillside Above River?
It is owned by the State Highway Agency.