State Route 20 over Steer Ditch
GoodColusa County, California · 03-COL-020-36.02 · Structure no. 15 0018
- Built
- 1923
- 102 years old, rebuilt 1991
- Condition
- Good
- inspected January 2025
- Type
- Tee Beam
- Concrete Continuous
- Length
- 43 ft
- 2 main spans
- Daily traffic
- 9,800
- 2013 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 20 over Steer Ditch is a concrete continuous tee beam carrying State Route 20 over Steer Ditch in Colusa County, California. It was built in 1923 and reconstructed in 1991, so it is 102 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 9,800 vehicles a day, projected to reach 13,716 by 2043. The structure is 43 ft (13.1 m) long and 43 ft wide. If it were closed, the detour would be 24.2 mi (39 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 20 over Steer Ditch built?
It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1991.
What condition is State Route 20 over Steer Ditch 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 January 2025.
How much traffic does State Route 20 over Steer Ditch carry?
About 9,800 vehicles per day (2013 count).
How long is State Route 20 over Steer Ditch?
The structure is 43 ft (13.1 m) long with a longest span of 21 ft (6.4 m) and a deck 43 ft wide.
Who owns State Route 20 over Steer Ditch?
It is owned by the State Highway Agency.