Spring Mountain Rd over York Creek
Napa County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Spring Mountain Rd over York Creek in Napa County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1903 and reconstructed in 1935, making it 122 years old at the 2025 inventory.
- It carries about 1,500 vehicles a day (traffic count year 2012).
- Its listed owner is a city or municipal highway agency.
- It is one of 81 of the 160 inventoried bridges in Napa County rated fair (50.6%); 8 (5.0%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (38.50726, -122.4921)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Superstructure | 5 | Fair condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Masonry deck arch |
| Length | about 33 ft |
| Location | 0.3 Mi West of Madrona St |
| NBI structure number | 21C0113 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Napa County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 29 over State Route 221 (soscol) | 2024 | 79,300 | Good |
| State Route 29 over American Canyon Creek | 1943 | 48,000 | Fair |
| State Route 29 over Nvrr Napa River Stanly | 1977 | 48,000 | Poor |
| State Route 29 over Stanley Creek | 1981 | 48,000 | Fair |
| State Route 29 over Dry Creek | 1970 | 43,000 | Fair |
| St Rte 29 Byway E over Craig Creek | 1958 | 43,000 | Good |
All bridges nearby: Napa County, CA bridge conditions · every bridge in Napa County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.