State Route 1 over Millerton Gulch
Fair Condition29 years old2,300 vehicles/day
Location
| State | California |
| County | Marin |
| Location | 04-mrn-001-33.40 |
| Carries | State Route 1 |
| Crosses | Millerton Gulch |
| Coordinates | 38.10927, -122.83971 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 3 (Serious) |
| Culvert | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 30.5 ft (9.3 m) |
| Max Span | 14.1 ft (4.3 m) |
| Deck Width | 35.4 ft (10.8 m) |
| Deck Area | 100.4 sq m |
| Main Spans | 2 |
| Year Built | 1997 |
Traffic
| Avg Daily Traffic | 2,300 (2020) |
| Truck Traffic | 3% |
| Lanes On 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 0114 |