State Route 36 over Mad River
GoodTrinity County, California · 02-TRI-036-R2.73 · Structure no. 05 0034
- Built
- 1958
- 67 years old
- Condition
- Good
- inspected March 2021
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 298 ft
- 4 main spans
- Daily traffic
- 1,300
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 36 over Mad River is a steel stringer/multi-beam or girder carrying State Route 36 over Mad River in Trinity County, California. It was built in 1958, so it is 67 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 1,300 vehicles a day, projected to reach 921 by 2038. The structure is 298 ft (90.7 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 36 over Mad River built?
It was built in 1958, making it 67 years old in 2025.
What condition is State Route 36 over Mad River 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 March 2021.
How much traffic does State Route 36 over Mad River carry?
About 1,300 vehicles per day (2009 count).
How long is State Route 36 over Mad River?
The structure is 298 ft (90.7 m) long with a longest span of 73 ft (22.3 m) and a deck 32 ft wide.
Who owns State Route 36 over Mad River?
It is owned by the State Highway Agency.