Diamond Mtn RD over Lights Creek
GoodPlumas County, California · 8.2 MI NE Beckwrth-Grn RD · Structure no. 09C0056
- Built
- 1970
- 55 years old
- Condition
- Good
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 102 ft
- 1 main span
- Daily traffic
- 80
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
Diamond Mtn RD over Lights Creek is a concrete box beam or girders - multiple carrying Diamond Mtn RD over Lights Creek in Plumas 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 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 80 vehicles a day, roughly 5% of them trucks, projected to reach 262 by 2044. The structure is 102 ft (31.1 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
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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Diamond Mtn RD over Lights Creek built?
It was built in 1970, making it 55 years old in 2025.
What condition is Diamond Mtn RD over Lights Creek 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 September 2023.
How much traffic does Diamond Mtn RD over Lights Creek carry?
About 80 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is Diamond Mtn RD over Lights Creek?
The structure is 102 ft (31.1 m) long with a longest span of 99 ft (30.2 m) and a deck 29 ft wide.
Who owns Diamond Mtn RD over Lights Creek?
It is owned by the County Highway Agency.