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Middle Colon Road over Prairie River

St. Joseph County, Michigan · rated Fair in the 2025 National Bridge Inventory

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

Middle Colon Road over Prairie River in St. Joseph County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1964, making it 61 years old at the 2025 inventory.
It carries about 720 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 77 of the 132 inventoried bridges in St. Joseph County rated fair (58.3%); 16 (12.1%) 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

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

Bridge	Built	Vehicles/day	Condition
US-131 over St Joseph River	2013	9,999	Good
US-131 NB over Rocky River	1951	9,588	Fair
US-131 SB over Rocky River	1956	9,588	Fair
US-131 over White Pigeon River	1994	9,556	Fair
M-60 & US-131 Br over Rocky River	1966	9,299	Fair
M-60 & US-131 Br over Rocky River Race	1942	9,299	Fair