Big Trees Parkway over N Fork Stanislaus River
PoorPosted for loadCalaveras County, California · Calav Big Trees ST Pk · Structure no. 30P0001
- Built
- 1959
- 66 years old
- Condition
- Poor
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 242 ft
- 3 main spans
- Daily traffic
- 400
- 2010 count
- Owner
- State
- State Park, Forest, or Reservation Agency
About this bridge
Big Trees Parkway over N Fork Stanislaus River is a steel stringer/multi-beam or girder carrying Big Trees Parkway over N Fork Stanislaus River in Calaveras County, California. It was built in 1959, so it is 66 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 400 vehicles a day, roughly 1% of them trucks, projected to reach 1,091 by 2041. The structure is 242 ft (73.8 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Big Trees Parkway over N Fork Stanislaus River built?
It was built in 1959, making it 66 years old in 2025.
What condition is Big Trees Parkway over N Fork Stanislaus River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.
How much traffic does Big Trees Parkway over N Fork Stanislaus River carry?
About 400 vehicles per day (2010 count), of which roughly 1% are trucks.
How long is Big Trees Parkway over N Fork Stanislaus River?
The structure is 242 ft (73.8 m) long with a longest span of 120 ft (36.6 m) and a deck 36 ft wide.
Who owns Big Trees Parkway over N Fork Stanislaus River?
It is owned by the State Park, Forest, or Reservation Agency.