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Co Rd 424 over Iron River

Iron County, Michigan · rated Fair in the 2025 National Bridge Inventory

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

Co Rd 424 over Iron River in Iron County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1929 and reconstructed in 1992, making it 96 years old at the 2025 inventory.
It carries about 800 vehicles a day (traffic count year 1996).
Its listed owner is a city or municipal highway agency.
It is one of 26 of the 54 inventoried bridges in Iron County rated fair (48.1%); 12 (22.2%) 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	Prestressed concrete multiple box beam
Length	about 54 ft
Location	So City Limits
NBI structure number	000000000004214
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
W Genesee(old US2) over Iron River Buried	1918	8,200	Poor
US-2\|ADAMS St over Iron River	1997	7,655	Fair
US-2 over Chicagoan Creek	1929	3,653	Poor
US-2 over Fortune Lake Outlet	1942	3,653	Fair
M-69 over Paint River	1924	3,080	Fair
US-141 over Paint River	1970	3,039	Fair