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Middle Colon Road over Big Swan Creek

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

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

Middle Colon Road over Big Swan Creek in St. Joseph County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
It was built in 2008, making it 17 years old at the 2025 inventory.
It carries about 433 vehicles a day (traffic count year 2003).
Its listed owner is the county highway agency.
It is one of 39 of the 132 inventoried bridges in St. Joseph County rated good (29.5%); 16 (12.1%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

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