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Irr Mina Rd over North Fork Eel River

Mendocino County, California · rated Fair in the 2025 National Bridge Inventory

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

Irr Mina Rd over North Fork Eel River in Mendocino County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1967, making it 58 years old at the 2025 inventory.
It carries about 143 vehicles a day (traffic count year 2011).
Its listed owner is the county highway agency.
It is one of 205 of the 356 inventoried bridges in Mendocino County rated fair (57.6%); 27 (7.6%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 339 ft
Location	4.2 Mi S Trinity Co Line
NBI structure number	10C0060
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.

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