Lindley Road over Mattole River
PoorPosted for loadHumboldt County, California · 0.5 MI NE Mattole RD · Structure no. 04C0075
- Built
- 1925
- 100 years old
- Condition
- Poor
- inspected March 2024
- Type
- Suspension
- Steel
- Length
- 230 ft
- 1 main span
- Daily traffic
- 50
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
Lindley Road over Mattole River is a steel suspension carrying Lindley Road over Mattole River in Humboldt County, California. It was built in 1925, so it is 100 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. Its operating status is: posted for load restriction.
It carries about 50 vehicles a day, roughly 2% of them trucks, projected to reach 109 by 2041. The structure is 230 ft (70.1 m) long and 13 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 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 Lindley Road over Mattole River built?
It was built in 1925, making it 100 years old in 2025.
What condition is Lindley Road over Mattole 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 March 2024.
How much traffic does Lindley Road over Mattole River carry?
About 50 vehicles per day (2011 count), of which roughly 2% are trucks.
How long is Lindley Road over Mattole River?
The structure is 230 ft (70.1 m) long with a longest span of 224 ft (68.4 m) and a deck 13 ft wide.
Who owns Lindley Road over Mattole River?
It is owned by the County Highway Agency.