Structure 17C0028 · Nevada County, CA
Carries Relief Hill RD over Humbug Creek, Near Graniteville RD.
23 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 girder bridge.
| State | California |
| County | Nevada |
| Location | Near Graniteville RD |
| Carries | Relief Hill RD |
| Crosses | Humbug Creek |
| Coordinates | 39.36661, -120.89938 |
| Material | Steel Continuous |
| Design | Girder and Floorbeam |
| Total Length | 23.0 ft (7 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 16.4 ft (5 m) |
| Deck Area | 35 sq m |
| Main Spans | 1 |
| Year Built | 1952 (reconstructed 2021) |
| Avg Daily Traffic | 27 (2018) |
| Truck Traffic | 1% |
| Lanes On Bridge | 1 |
| Last Inspection | August 2024 |
| Inspection Frequency | Every 12 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 17C0028 |
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.