Structure 27C0107 · Marin County, CA
Carries Muir Woods RD over Redwood Creek, 2.0 Mi N Of SR 1.
Set by its lowest-rated component: Deck and Substructure at 5 of 9.
How ratings work22 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a tee-beam bridge.
| State | California |
| County | Marin |
| Location | 2.0 Mi N Of SR 1 |
| Carries | Muir Woods RD |
| Crosses | Redwood Creek |
| Coordinates | 37.88857, -122.56733 |
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 21.7 ft (6.6 m) |
| Max Span | 20.7 ft (6.3 m) |
| Deck Width | 26.9 ft (8.2 m) |
| Deck Area | 54.1 sq m |
| Main Spans | 1 |
| Year Built | 1946 |
| Avg Daily Traffic | 2,090 (2001) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
| Last Inspection | July 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 3 — Scour critical |
| Structure Number | 27C0107 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.