State Route 120 over Big Creek
GoodTuolumne County, California · 10-TUO-120-R37.78 · Structure no. 32 0058
- Built
- 1977
- 48 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 323 ft
- 3 main spans
- Daily traffic
- 3,800
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 120 over Big Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying State Route 120 over Big Creek in Tuolumne County, California. It was built in 1977, so it is 48 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 3,800 vehicles a day, projected to reach 8,388 by 2045. The structure is 323 ft (98.5 m) long and 43 ft wide. If it were closed, the detour would be 19.9 mi (32 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. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 120 over Big Creek built?
It was built in 1977, making it 48 years old in 2025.
What condition is State Route 120 over Big Creek 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 September 2023.
How much traffic does State Route 120 over Big Creek carry?
About 3,800 vehicles per day (2009 count).
How long is State Route 120 over Big Creek?
The structure is 323 ft (98.5 m) long with a longest span of 106 ft (32.3 m) and a deck 43 ft wide.
Who owns State Route 120 over Big Creek?
It is owned by the State Highway Agency.