Middle RD over Estero De San Antonio
Fair Condition68 years old40 vehicles/day
Location
| State | California |
| County | Marin |
| Location | 4.5 Mi From S.r. 1 |
| Carries | Middle RD |
| Crosses | Estero De San Antonio |
| Coordinates | 38.26393, -122.92732 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 195.9 ft (59.7 m) |
| Max Span | 32.2 ft (9.8 m) |
| Deck Width | 27.9 ft (8.5 m) |
| Deck Area | 507.4 sq m |
| Main Spans | 6 |
| Year Built | 1958 |
Traffic
| Avg Daily Traffic | 40 (1973) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 27C0124 |