Bridge conditions in Calaveras County, California
108 inventoried bridges · 6 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 108 bridges in Calaveras County: 39 rated good, 63 fair, and 6 poor.
- 6 of the 108 bridges in Calaveras County, California, are rated in poor condition (5.6%) in the 2025 National Bridge Inventory, as of .
- 39 bridges (36.1%) are rated good and 63 (58.3%) fair.
- The median Calaveras County bridge was built in 1964.
- The busiest poor-rated bridge is State Route 26 over Indian Creek (built 1998), carrying about 2,500 vehicles a day.
Good 36.1% · Fair 58.3% · Poor 5.6% of 108 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 26 over Indian Creek | 1998 | 2,500 | Poor |
| Big Trees Parkway over N Fork Stanislaus River | 1959 | 400 | Poor |
| Hogan Dam Rd over Calaveras River | 1960 | 368 | Poor |
| Calaveritas Rd over Willow Creek | 1925 | 256 | Poor |
| Calaveritas Rd over Calaveritas Creek | 1928 | 203 | Poor |
| Rolleri Bypass Rd over Angels Creek | 1932 | 8 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 4 over Murphys Grade Road | 2009 | 9,150 | Good |
| State Route 4 over Angels Creek | 2009 | 9,150 | Good |
| State Route 49 over Angels Creek | 1909 | 9,100 | Fair |
| State Route 49 over Cherokee Creek | 1941 | 8,050 | Good |
| State Route 12 over Lime Creek | 1939 | 8,000 | Fair |
| State Route 4 over Waterman Creek | 1941 | 7,900 | Fair |
| State Route 4 over Gardner Lane | 2009 | 7,900 | Fair |
| State Route 4 over Creek & Penstock Pipe | 2009 | 7,900 | Good |
| Vallecito Road over Angels Creek | 1946 | 7,900 | Fair |
| State Route 12 over Haupt Creek | 1993 | 7,500 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of California: California bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.