RD 304 over Whitehead Slough
PoorPosted for loadLassen County, California · 0.9 MI E/O RD 302 · Structure no. 07C0052
- Built
- 1930
- 95 years old, rebuilt 1978
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 60 ft
- 3 main spans
- Daily traffic
- 100
- 1979 count
- Owner
- County
- County Highway Agency
About this bridge
RD 304 over Whitehead Slough is a wood or timber stringer/multi-beam or girder carrying RD 304 over Whitehead Slough in Lassen County, California. It was built in 1930 and reconstructed in 1978, so it is 95 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 100 vehicles a day, roughly 8% of them trucks, projected to reach 132 by 2041. The structure is 60 ft (18.3 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 RD 304 over Whitehead Slough built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1978.
What condition is RD 304 over Whitehead Slough 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 August 2024.
How much traffic does RD 304 over Whitehead Slough carry?
About 100 vehicles per day (1979 count), of which roughly 8% are trucks.
How long is RD 304 over Whitehead Slough?
The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.2 m) and a deck 29 ft wide.
Who owns RD 304 over Whitehead Slough?
It is owned by the County Highway Agency.