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Button Rd over Flat River

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

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

Button Rd over Flat River in Ionia 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 1982, making it 43 years old at the 2025 inventory.
It carries about 1,357 vehicles a day (traffic count year 2007).
Its listed owner is the county highway agency.
It is one of 69 of the 118 inventoried bridges in Ionia County rated fair (58.5%); 12 (10.2%) 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 97 ft
Location	.5 Mi East of Smyrna
NBI structure number	000000000004040
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-96 over Portland Trail	2013	35,000	Good
I-96 over Libhart Creek	1958	33,978	Fair
I-96 EB over Kent Rd	1959	20,074	Fair
I-96 WB over Kent Rd	1959	20,074	Fair
I-96 EB over Okemos Rd	1959	20,074	Fair
I-96 WB over Okemos Rd	1959	20,074	Fair