Alderpoint RD over Martin Creek
FairHumboldt County, California · 6.7 MI South Bridgeville · Structure no. 04C0084
- Built
- 1972
- 53 years old
- Condition
- Fair
- inspected February 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 172 ft
- 2 main spans
- Daily traffic
- 124
- 2008 count
- Owner
- County
- County Highway Agency
About this bridge
Alderpoint RD over Martin Creek is a concrete continuous box beam or girders - multiple carrying Alderpoint RD over Martin Creek in Humboldt County, California. It was built in 1972, so it is 53 years old, younger 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 124 vehicles a day, roughly 4% of them trucks, projected to reach 327 by 2042. The structure is 172 ft (52.4 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Alderpoint RD over Martin Creek built?
It was built in 1972, making it 53 years old in 2025.
What condition is Alderpoint RD over Martin 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 February 2024.
How much traffic does Alderpoint RD over Martin Creek carry?
About 124 vehicles per day (2008 count), of which roughly 4% are trucks.
How long is Alderpoint RD over Martin Creek?
The structure is 172 ft (52.4 m) long with a longest span of 65 ft (19.8 m) and a deck 29 ft wide.
Who owns Alderpoint RD over Martin Creek?
It is owned by the County Highway Agency.