Obyrnes Ferry Road over Tullock Reservoir
FairCalaveras County, California · Cal/Tuo County Line · Structure no. 30C0085
- Built
- 1957
- 68 years old
- Condition
- Fair
- inspected February 2025
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 577 ft
- 3 main spans
- Daily traffic
- 2,963
- 2007 count
- Owner
- County
- County Highway Agency
About this bridge
Obyrnes Ferry Road over Tullock Reservoir is a concrete continuous box beam or girders - multiple carrying Obyrnes Ferry Road over Tullock Reservoir in Calaveras County, California. It was built in 1957, so it is 68 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 2,963 vehicles a day, roughly 18% of them trucks, projected to reach 12,376 by 2045. The structure is 577 ft (175.9 m) long and 25 ft wide. If it were closed, the detour would be 41 mi (66 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 | 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 Obyrnes Ferry Road over Tullock Reservoir built?
It was built in 1957, making it 68 years old in 2025.
What condition is Obyrnes Ferry Road over Tullock 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 February 2025.
How much traffic does Obyrnes Ferry Road over Tullock Reservoir carry?
About 2,963 vehicles per day (2007 count), of which roughly 18% are trucks.
How long is Obyrnes Ferry Road over Tullock Reservoir?
The structure is 577 ft (175.9 m) long with a longest span of 155 ft (47.2 m) and a deck 25 ft wide.
Who owns Obyrnes Ferry Road over Tullock Reservoir?
It is owned by the County Highway Agency.