State Route 120 over Don Pedro Reservoir
FairTuolumne County, California · 10-TUO-120-R19.61 · Structure no. 32 0018
- Built
- 1971
- 54 years old, rebuilt 2017
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,394 ft
- 6 main spans
- Daily traffic
- 3,800
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 120 over Don Pedro Reservoir is a steel continuous stringer/multi-beam or girder carrying State Route 120 over Don Pedro Reservoir in Tuolumne County, California. It was built in 1971 and reconstructed in 2017, so it is 54 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 3,800 vehicles a day, roughly 7% of them trucks, projected to reach 6,901 by 2045. The structure is 1,394 ft (424.9 m) long and 42 ft wide. If it were closed, the detour would be 19.3 mi (31 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 | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 120 over Don Pedro Reservoir built?
It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2017.
What condition is State Route 120 over Don Pedro Reservoir 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 September 2023.
How much traffic does State Route 120 over Don Pedro Reservoir carry?
About 3,800 vehicles per day (2009 count), of which roughly 7% are trucks.
How long is State Route 120 over Don Pedro Reservoir?
The structure is 1,394 ft (424.9 m) long with a longest span of 350 ft (106.7 m) and a deck 42 ft wide.
Who owns State Route 120 over Don Pedro Reservoir?
It is owned by the State Highway Agency.