Marshall Petlum RD over Salmon Creek
PoorMarin County, California · 3.0MI W of Hicksvalley RD · Structure no. 27C0111
- Built
- 1931
- 94 years old
- Condition
- Poor
- inspected July 2024
- Type
- Tee Beam
- Concrete
- Length
- 34 ft
- 1 main span
- Daily traffic
- 328
- 1973 count
- Owner
- County
- County Highway Agency
About this bridge
Marshall Petlum RD over Salmon Creek is a concrete tee beam carrying Marshall Petlum RD over Salmon Creek in Marin County, California. It was built in 1931, so it is 94 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 328 vehicles a day, roughly 3% of them trucks, projected to reach 555 by 2046. The structure is 34 ft (10.4 m) long and 28 ft wide. If it were closed, the detour would be 26.7 mi (43 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Marshall Petlum RD over Salmon Creek built?
It was built in 1931, making it 94 years old in 2025.
What condition is Marshall Petlum RD over Salmon Creek 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 July 2024.
How much traffic does Marshall Petlum RD over Salmon Creek carry?
About 328 vehicles per day (1973 count), of which roughly 3% are trucks.
How long is Marshall Petlum RD over Salmon Creek?
The structure is 34 ft (10.4 m) long with a longest span of 31 ft (9.4 m) and a deck 28 ft wide.
Who owns Marshall Petlum RD over Salmon Creek?
It is owned by the County Highway Agency.