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Charlton Park Road over Little Thornapple River

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

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

Charlton Park Road over Little Thornapple River 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 7 (good condition) on the 0-9 scale.
It was built in 2020, making it 5 years old at the 2025 inventory.
It carries about 557 vehicles a day (traffic count year 2019).
Its listed owner is the county 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

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	2019	6,083	Good