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Bridge conditions in Mendocino County, California

356 inventoried bridges · 27 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

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 August 20, 2026.
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.

Every bridge in Mendocino County → - all 356, busiest first, each with its own condition record.

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.