Road M1 over Benmore Creek
FairLake County, California · 9 Mi. NE of Potter Valley · Structure no. 050854000001002
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected August 2023
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 114 ft
- 1 main span
- Daily traffic
- 300
- 1992 count
- Owner
- Federal
- U.S. Forest Service
About this bridge
Road M1 over Benmore Creek is a concrete box beam or girders - multiple carrying Road M1 over Benmore Creek in Lake 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 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 300 vehicles a day, roughly 3% of them trucks, projected to reach 450 by 2045. The structure is 114 ft (34.7 m) long and 29 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 8 Very Good | No problems noted. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Road M1 over Benmore Creek built?
It was built in 1970, making it 55 years old in 2025.
What condition is Road M1 over Benmore Creek 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 August 2023.
How much traffic does Road M1 over Benmore Creek carry?
About 300 vehicles per day (1992 count), of which roughly 3% are trucks.
How long is Road M1 over Benmore Creek?
The structure is 114 ft (34.7 m) long with a longest span of 76 ft (23.2 m) and a deck 29 ft wide.
Who owns Road M1 over Benmore Creek?
It is owned by the U.S. Forest Service.