Interlake RD over San Antonio River
FairMonterey County, California · 3 MI S of Jolon Rd. · Structure no. 44C0047
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected February 2025
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 310 ft
- 4 main spans
- Daily traffic
- 260
- 2016 count
- Owner
- County
- County Highway Agency
About this bridge
Interlake RD over San Antonio River is a concrete continuous box beam or girders - multiple carrying Interlake RD over San Antonio River in Monterey County, California. It was built in 1964, so it is 61 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 260 vehicles a day, roughly 5% of them trucks, projected to reach 445 by 2047. The structure is 310 ft (94.5 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interlake RD over San Antonio River built?
It was built in 1964, making it 61 years old in 2025.
What condition is Interlake RD over San Antonio River 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 Interlake RD over San Antonio River carry?
About 260 vehicles per day (2016 count), of which roughly 5% are trucks.
How long is Interlake RD over San Antonio River?
The structure is 310 ft (94.5 m) long with a longest span of 85 ft (25.9 m) and a deck 29 ft wide.
Who owns Interlake RD over San Antonio River?
It is owned by the County Highway Agency.