Bridge conditions in Mendocino County, California
356 inventoried bridges · 27 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
27 of the 356 bridges the federal inventory lists in Mendocino County are rated poor; the rest split 124 good and 205 fair.
- 27 of the 356 bridges in Mendocino County, California, are rated in poor condition (7.6%) in the 2025 National Bridge Inventory, as of .
- 124 bridges (34.8%) are rated good and 205 (57.6%) fair.
- The median Mendocino County bridge was built in 1964.
- The busiest poor-rated bridge is N State St over York Creek (built 1980), carrying about 7,012 vehicles a day.
Good 34.8% · Fair 57.6% · Poor 7.6% of 356 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 |
|---|---|---|---|
| N State St over York Creek | 1980 | 7,012 | Poor |
| U.S. Highway 101 over Long Valley Creek | 1960 | 6,750 | Poor |
| U.S. Highway 101 over Long Valley Creek | 1957 | 6,700 | Poor |
| North Bush Street over Orrs Creek | 1972 | 4,692 | Poor |
| State Route 1 over Salmon Creek | 1950 | 3,100 | Poor |
| Moore Ave over West Branch Russian Riv | 1958 | 2,776 | Poor |
| E Side Potter Vly over East Fork Russian River | 1973 | 2,352 | Poor |
| State Route 1 over Albion River | 1944 | 2,100 | Poor |
| State Route 162 over Outlet Creek | 1958 | 860 | Poor |
| Gibson Lane over East Fork Russian River | 1955 | 561 | Poor |
| Philo Greenwood Rd over Navarro River | 1949 | 418 | Poor |
| Lambert Lane over Robinson Creek | 1954 | 379 | Poor |
| Mountain View Rd over Rancheria Creek | 1935 | 195 | Poor |
| State Park Road over Little River | 1951 | 150 | Poor |
| Sherwood Rd over Sherwood Creek | 1979 | 137 | Poor |
| Orr Springs Rd over South Fork Big River | 1955 | 134 | Poor |
| Reeves Canyon Road over Mill Creek | 1981 | 105 | Poor |
| Gualala Road over North Fork Gualala River | 1940 | 97 | Poor |
| Hill Road over Mill Creek | 1925 | 78 | Poor |
| Road M1 over Black Butte River | 1986 | 50 | Poor |
| Low Gap Road over Masonite Industrial Road | 1960 | 25 | Poor |
| Forest Road 330 over Parlin Creek | 2005 | 25 | Poor |
| Reynolds Highway over Outlet Creek | 1955 | 19 | Poor |
| Forest Road 400 over Bunker Gulch | 1992 | 10 | Poor |
| Forest Road 452 over Hare Creek | 1997 | 10 | Poor |
| Camp 1 Ten Mile Rd over South Fork Tenmile River | 1965 | 2 | Poor |
| Forest Road 610 over South Fork Caspar Creek | 1965 | 2 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 1 over Pudding Creek | 1959 | 23,950 | Good |
| State Route 001 over Noyo River & Harbor Dr | 2005 | 23,950 | Good |
| U.S. Highway 101 over Austin Creek | 1964 | 20,900 | Good |
| North State St over Forsythe Creek | 1949 | 20,200 | Fair |
| U.S. Highway 101 over Ncrra/nwp RR | 1957 | 19,000 | Fair |
| U.S. Highway 101 over Baker Creek | 1971 | 19,000 | Good |
| U.S. Highway 101 over Forsythe Creek | 1990 | 19,000 | Fair |
| State Route 20 over Baechtel Creek | 1937 | 18,350 | Good |
| N State St over Orrs Creek | 1926 | 18,278 | Fair |
| E Gobbi St over U.S. Highway 101 | 1964 | 18,100 | 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.