Structure 28C0347 · Contra Costa County, CA
Carries Gregory LN over Contra Costa Canal, 0.1 Mi E Pleasant Hill RD.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.
How ratings work23 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 slab bridge.
| State | California |
| County | Contra Costa |
| Location | 0.1 Mi E Pleasant Hill RD |
| Carries | Gregory LN |
| Crosses | Contra Costa Canal |
| Coordinates | 37.94780, -122.08051 |
| Material | Concrete |
| Design | Slab |
| Total Length | 23.0 ft (7 m) |
| Max Span | 21.7 ft (6.6 m) |
| Deck Width | 75.1 ft (22.9 m) |
| Deck Area | 160.3 sq m |
| Main Spans | 1 |
| Year Built | 1939 (reconstructed 1975) |
| Avg Daily Traffic | 9,000 (2020) |
| Truck Traffic | 5% |
| Lanes On Bridge | 4 |
| Last Inspection | February 2025 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 28C0347 |
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.