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M-66 over Quaker Brook

Barry County, Michigan · rated Good in the 2025 National Bridge Inventory

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

M-66 over Quaker Brook in Barry 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 2019, making it 6 years old at the 2025 inventory.
It carries about 6,083 vehicles a day (traffic count year 2015).
Its listed owner is the state highway agency.
It is one of 19 of the 69 inventoried bridges in Barry County rated good (27.5%); 15 (21.7%) 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


Structure	Steel stringer or multi-beam girder
Length	about 44 ft
Location	In Village of Nashville
NBI structure number	000000000000544
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
M-43 over Thornapple River	1963	12,750	Fair
M-37 over Duncan Creek	1957	10,700	Fair
Main Street over Thornapple River	2015	8,000	Good
Michigan Ave over Thornapple River	2012	7,215	Good
M-66 over Thornapple River	1999	6,177	Fair
M-66 over Quaker Brook	1940	4,450	Fair