Carbondale Road over Willow Creek
Amador County, California · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Carbondale Road over Willow Creek in Amador County, California, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2005, making it 20 years old at the 2025 inventory.
- It carries about 523 vehicles a day (traffic count year 2010).
- Its listed owner is the county highway agency.
- It is one of 21 of the 61 inventoried bridges in Amador County rated good (34.4%); 15 (24.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated April 2024, on a 48-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (38.4464, -120.91823)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete slab |
| Length | about 44 ft |
| Location | 0.6 Mi Sw/o SR 16 |
| NBI structure number | 26C0050 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Amador County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 88 over Rocky Creek | 1942 | 22,300 | Good |
| State Route 49 over Jackson Creek | 1948 | 19,800 | Good |
| State Route 49 over Sutter Creek | 2007 | 13,900 | Good |
| State Route 49 over Amador Creek | 2007 | 13,900 | Good |
| State Route 104 over Sutter Creek | 1970 | 11,000 | Poor |
| State Route 49 over Rancheria Creek | 1983 | 11,000 | Fair |
All bridges nearby: Amador County, CA bridge conditions · every bridge in Amador County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.