Maple Creek Road over North Fork Mad River
PoorHumboldt County, California · In Korbel · Structure no. 04C0026
- Built
- 1928
- 97 years old
- Condition
- Poor
- inspected October 2023
- Type
- Arch - Thru
- Concrete
- Length
- 429 ft
- 1 main span
- Daily traffic
- 624
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
Maple Creek Road over North Fork Mad River is a concrete arch - thru carrying Maple Creek Road over North Fork Mad River in Humboldt County, California. It was built in 1928, so it is 97 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 624 vehicles a day, roughly 10% of them trucks, projected to reach 1,637 by 2041. The structure is 429 ft (130.8 m) long and 27 ft wide. If it were closed, the detour would be 28 mi (45 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 Maple Creek Road over North Fork Mad River built?
It was built in 1928, making it 97 years old in 2025.
What condition is Maple Creek Road over North Fork Mad River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.
How much traffic does Maple Creek Road over North Fork Mad River carry?
About 624 vehicles per day (2011 count), of which roughly 10% are trucks.
How long is Maple Creek Road over North Fork Mad River?
The structure is 429 ft (130.8 m) long with a longest span of 144 ft (43.9 m) and a deck 27 ft wide.
Who owns Maple Creek Road over North Fork Mad River?
It is owned by the County Highway Agency.