State Route 36 over Susan River
FairLassen County, California · 02-LAS-036-R17.38 · Structure no. 07 0046
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected May 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 285 ft
- 3 main spans
- Daily traffic
- 2,900
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 36 over Susan River is a concrete continuous box beam or girders - multiple carrying State Route 36 over Susan River in Lassen 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 2,900 vehicles a day, roughly 8% of them trucks, projected to reach 4,489 by 2040. The structure is 285 ft (86.9 m) long and 34 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 36 over Susan River built?
It was built in 1966, making it 59 years old in 2025.
What condition is State Route 36 over Susan 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 May 2023.
How much traffic does State Route 36 over Susan River carry?
About 2,900 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is State Route 36 over Susan River?
The structure is 285 ft (86.9 m) long with a longest span of 113 ft (34.4 m) and a deck 34 ft wide.
Who owns State Route 36 over Susan River?
It is owned by the State Highway Agency.