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M-50 over River Raisin

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

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

M-50 over River Raisin in Lenawee 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 5 (fair condition) on the 0-9 scale.
It was built in 1953, making it 72 years old at the 2025 inventory.
It carries about 10,655 vehicles a day (traffic count year 2007).
Its listed owner is the state highway agency.
It is one of 105 of the 225 inventoried bridges in Lenawee County rated fair (46.7%); 26 (11.6%) 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 145 ft
Location	In Tecumseh
NBI structure number	000000000005536
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
M-52 over Beaver Creek	1919	18,099	Fair
M-52 over S Br Raisin River	1948	17,411	Fair
US-223 over Norfolk Southern RR	1941	16,443	Poor
US-223 over Raisin River	1940	13,979	Fair
Bentoak Ave over S Branch Raisin River	1952	13,600	Fair
US-223 over Mdot RR Cor & M-34	2006	13,595	Fair