County Line RD over Colusa Drain
PoorColusa County, California · 4.5 Mi. East of I-5 · Structure no. 15C0027
- Built
- 1970
- 55 years old
- Condition
- Poor
- inspected December 2024
- Type
- Slab
- Concrete Continuous
- Length
- 211 ft
- 7 main spans
- Daily traffic
- 170
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
County Line RD over Colusa Drain is a concrete continuous slab carrying County Line RD over Colusa Drain in Colusa County, California. It was built in 1970, so it is 55 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 170 vehicles a day, roughly 10% of them trucks, projected to reach 275 by 2046. The structure is 211 ft (64.3 m) long and 29 ft wide. If it were closed, the detour would be 16.8 mi (27 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 County Line RD over Colusa Drain built?
It was built in 1970, making it 55 years old in 2025.
What condition is County Line RD over Colusa Drain in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.
How much traffic does County Line RD over Colusa Drain carry?
About 170 vehicles per day (2015 count), of which roughly 10% are trucks.
How long is County Line RD over Colusa Drain?
The structure is 211 ft (64.3 m) long with a longest span of 32 ft (9.8 m) and a deck 29 ft wide.
Who owns County Line RD over Colusa Drain?
It is owned by the County Highway Agency.