Bridge conditions in Mono County, California
56 inventoried bridges · 3 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
3 of the 56 bridges the federal inventory lists in Mono County are rated poor; the rest split 35 good and 18 fair.
- 3 of the 56 bridges in Mono County, California, are rated in poor condition (5.4%) in the 2025 National Bridge Inventory, as of .
- 35 bridges (62.5%) are rated good and 18 (32.1%) fair.
- The median Mono County bridge was built in 1970.
- The busiest poor-rated bridge is Cunningham Lane over West Walker River (built 1951), carrying about 82 vehicles a day.
Good 62.5% · Fair 32.1% · Poor 5.4% of 56 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 |
|---|---|---|---|
| Cunningham Lane over West Walker River | 1951 | 82 | Poor |
| 32017 over Buckeye Creek | 1960 | 50 | Poor |
| Forest Road 62 over Wolf Creek | 1979 | 20 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. Highway 395 over Crooked Creek | 1970 | 13,100 | Fair |
| US Highway 395 SB over State Route 203 | 1969 | 9,500 | Fair |
| US Highway 395 SB over Mammoth Creek | 1969 | 8,450 | Good |
| U.S. Highway 395 over Roadside Drainage Ditch | 1989 | 7,450 | Good |
| US Highway 395 NB over Mammoth Creek | 1969 | 7,000 | Good |
| U.S. Highway 395 over West Walker River | 1987 | 6,950 | Good |
| U.S. Highway 395 over East Walker River | 1961 | 6,950 | Good |
| U.S. Highway 395 over South Branch Robinson CR | 1934 | 6,950 | Good |
| U.S. Highway 395 over North Branch Robinson CR | 1934 | 6,950 | Good |
| U.S. Highway 395 over N Br Buckeye Creek | 1934 | 6,950 | Good |
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.