U.S. Highway 101 over Forsythe Creek
FairMendocino County, California · 01-MEN-101-R31.88 · Structure no. 10 0269
- Built
- 1990
- 35 years old
- Condition
- Fair
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 238 ft
- 3 main spans
- Daily traffic
- 19,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Forsythe Creek is a concrete continuous box beam or girders - multiple carrying U.S. Highway 101 over Forsythe Creek in Mendocino County, California. It was built in 1990, so it is 35 years old, younger 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 19,000 vehicles a day, roughly 9% of them trucks, projected to reach 33,885 by 2045. The structure is 238 ft (72.5 m) long and 92 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was U.S. Highway 101 over Forsythe Creek built?
It was built in 1990, making it 35 years old in 2025.
What condition is U.S. Highway 101 over Forsythe 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 2023.
How much traffic does U.S. Highway 101 over Forsythe Creek carry?
About 19,000 vehicles per day (2009 count), of which roughly 9% are trucks.
How long is U.S. Highway 101 over Forsythe Creek?
The structure is 238 ft (72.5 m) long with a longest span of 95 ft (29 m) and a deck 92 ft wide.
Who owns U.S. Highway 101 over Forsythe Creek?
It is owned by the State Highway Agency.