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Johnson Road over Flat River

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

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

Johnson Road over Flat River in Montcalm 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 1985, making it 40 years old at the 2025 inventory.
It carries about 1,082 vehicles a day (traffic count year 2017).
Its listed owner is the county highway agency.
It is one of 69 of the 121 inventoried bridges in Montcalm County rated fair (57.0%); 7 (5.8%) 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 89 ft
Location	1.25 North of Wise Road
NBI structure number	000000000007454
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US-131SB & M-46sb over Tamarack Creek	1972	26,700	Fair
US-131NB & M-46nb over Tamarack Creek	1972	26,700	Fair
US-131 & M-46 SB over Kendaville Rd	1971	26,700	Fair
US-131 & M-46 NB over Kendaville Rd	1971	26,700	Fair
M-57 over Flat River	1948	11,727	Good
M-91 over Flat River	1994	11,433	Fair