E Rio Bonito RD over Hamilton Slough
GoodButte County, California · 0.2 MI E of SH 99 · Structure no. 12C0164
- Built
- 1930
- 95 years old
- Condition
- Good
- inspected October 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 61 ft
- 3 main spans
- Daily traffic
- 270
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
E Rio Bonito RD over Hamilton Slough is a concrete continuous tee beam carrying E Rio Bonito RD over Hamilton Slough in Butte County, California. It was built in 1930, so it is 95 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 270 vehicles a day, roughly 2% of them trucks, projected to reach 366 by 2044. The structure is 61 ft (18.6 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was E Rio Bonito RD over Hamilton Slough built?
It was built in 1930, making it 95 years old in 2025.
What condition is E Rio Bonito RD over Hamilton Slough in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.
How much traffic does E Rio Bonito RD over Hamilton Slough carry?
About 270 vehicles per day (2019 count), of which roughly 2% are trucks.
How long is E Rio Bonito RD over Hamilton Slough?
The structure is 61 ft (18.6 m) long with a longest span of 20 ft (6.1 m) and a deck 21 ft wide.
Who owns E Rio Bonito RD over Hamilton Slough?
It is owned by the County Highway Agency.