Bohan Dillon RD over South Fork Gualala River
FairSonoma County, California · 0.1 MI N Fort Ross RD · Structure no. 20C0435
- Built
- 1950
- 75 years old
- Condition
- Fair
- inspected June 2023
- Type
- Truss - Deck
- Steel
- Length
- 77 ft
- 1 main span
- Daily traffic
- 50
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Bohan Dillon RD over South Fork Gualala River is a steel truss - deck carrying Bohan Dillon RD over South Fork Gualala River in Sonoma County, California. It was built in 1950, so it is 75 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 50 vehicles a day, roughly 1% of them trucks, projected to reach 147 by 2040. The structure is 77 ft (23.5 m) long and 13 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Bohan Dillon RD over South Fork Gualala River built?
It was built in 1950, making it 75 years old in 2025.
What condition is Bohan Dillon RD over South Fork Gualala 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 June 2023.
How much traffic does Bohan Dillon RD over South Fork Gualala River carry?
About 50 vehicles per day (2015 count), of which roughly 1% are trucks.
How long is Bohan Dillon RD over South Fork Gualala River?
The structure is 77 ft (23.5 m) long with a longest span of 72 ft (21.9 m) and a deck 13 ft wide.
Who owns Bohan Dillon RD over South Fork Gualala River?
It is owned by the County Highway Agency.