State Route 37 over Petaluma River
Fair Condition68 years old34,000 vehicles/day
Location
| State | California |
| County | Marin |
| Location | 04-mrn-037-14.47 |
| Carries | State Route 37 |
| Crosses | Petaluma River |
| Coordinates | 38.11418, -122.50721 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 2183.1 ft (665.4 m) |
| Max Span | 160.1 ft (48.8 m) |
| Deck Width | 67.3 ft (20.5 m) |
| Deck Area | 13640.7 sq m |
| Main Spans | 1 |
| Year Built | 1958 |
Traffic
| Avg Daily Traffic | 34,000 (2020) |
| Truck Traffic | 4% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 27 0013 |