State Route 70 over Big Grizzly Creek
FairPlumas County, California · 02-PLU-070-R78.64 · Structure no. 09 0055
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected June 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 166 ft
- 3 main spans
- Daily traffic
- 3,400
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 70 over Big Grizzly Creek is a concrete continuous tee beam carrying State Route 70 over Big Grizzly Creek in Plumas County, California. It was built in 1969, so it is 56 years old, older 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 3,400 vehicles a day, roughly 5% of them trucks, projected to reach 5,815 by 2040. The structure is 166 ft (50.6 m) long and 50 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 State Route 70 over Big Grizzly Creek built?
It was built in 1969, making it 56 years old in 2025.
What condition is State Route 70 over Big Grizzly 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 June 2023.
How much traffic does State Route 70 over Big Grizzly Creek carry?
About 3,400 vehicles per day (2009 count), of which roughly 5% are trucks.
How long is State Route 70 over Big Grizzly Creek?
The structure is 166 ft (50.6 m) long with a longest span of 61 ft (18.7 m) and a deck 50 ft wide.
Who owns State Route 70 over Big Grizzly Creek?
It is owned by the State Highway Agency.