Structure 35C0123 · San Mateo County, CA
Carries Kings Mountain RD over West Union Creek, 0.05 Mi E Tripp RD.
Set by its lowest-rated component: Superstructure and Substructure at 7 of 9.
How ratings work25 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 deck arch.
| State | California |
| County | San Mateo |
| Location | 0.05 Mi E Tripp RD |
| Carries | Kings Mountain RD |
| Crosses | West Union Creek |
| Coordinates | 37.43069, -122.27622 |
| Material | Concrete |
| Design | Arch - Deck |
| Total Length | 24.9 ft (7.6 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 22.0 ft (6.7 m) |
| Deck Area | 50.9 sq m |
| Main Spans | 1 |
| Year Built | 1905 |
| Avg Daily Traffic | 2,075 (2015) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
| Last Inspection | May 2023 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 35C0123 |
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.