Lake Herman Road over Interstate 680
FairSolano County, California · 04-SOL-680-R2.82 · Structure no. 23 0164
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 206 ft
- 2 main spans
- Daily traffic
- 1,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Lake Herman Road over Interstate 680 is a concrete continuous box beam or girders - multiple carrying Lake Herman Road over Interstate 680 in Solano County, California. It was built in 1966, so it is 59 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 1,000 vehicles a day, roughly 7% of them trucks, projected to reach 1,409 by 2042. The structure is 206 ft (62.8 m) long and 34 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lake Herman Road over Interstate 680 built?
It was built in 1966, making it 59 years old in 2025.
What condition is Lake Herman Road over Interstate 680 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 March 2024.
How much traffic does Lake Herman Road over Interstate 680 carry?
About 1,000 vehicles per day (2019 count), of which roughly 7% are trucks.
How long is Lake Herman Road over Interstate 680?
The structure is 206 ft (62.8 m) long with a longest span of 101 ft (30.8 m) and a deck 34 ft wide.
Who owns Lake Herman Road over Interstate 680?
It is owned by the State Highway Agency.