Upper Mad River RD over South Fork Mad River
GoodTrinity County, California · 28.5 MI S of SR 36 · Structure no. 05C0244
- Built
- 2014
- 11 years old
- Condition
- Good
- inspected June 2021
- Type
- Arch - Deck
- Concrete
- Length
- 57 ft
- 1 main span
- Daily traffic
- 100
- 2016 count
- Owner
- County
- County Highway Agency
About this bridge
Upper Mad River RD over South Fork Mad River is a concrete arch - deck carrying Upper Mad River RD over South Fork Mad River in Trinity County, California. It was built in 2014, so it is 11 years old, younger 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 100 vehicles a day, roughly 5% of them trucks, projected to reach 130 by 2038. The structure is 57 ft (17.3 m) long. 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 |
|---|---|---|
| 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 Upper Mad River RD over South Fork Mad River built?
It was built in 2014, making it 11 years old in 2025.
What condition is Upper Mad River RD over South Fork 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 June 2021.
How much traffic does Upper Mad River RD over South Fork Mad River carry?
About 100 vehicles per day (2016 count), of which roughly 5% are trucks.
How long is Upper Mad River RD over South Fork Mad River?
The structure is 57 ft (17.3 m) long with a longest span of 54 ft (16.5 m).
Who owns Upper Mad River RD over South Fork Mad River?
It is owned by the County Highway Agency.