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M-55 over Manistee River

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

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

M-55 over Manistee River in Manistee County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 7 (good condition) on the 0-9 scale.
It was built in 2021, making it 4 years old at the 2025 inventory.
It carries about 3,408 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 12 of the 35 inventoried bridges in Manistee County rated good (34.3%); 5 (14.3%) 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	Prestressed concrete stringer or multi-beam girder
Length	about 420 ft
Location	0.1 Mi E of US-31
NBI structure number	000000000006439
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US-31 over Manistee River	1933	17,789	Fair
M-115 over Betsie River	1940	4,219	Fair
M-55 over Pine Creek	1932	4,202	Fair
M-55 over Pine River	1934	3,175	Fair
East Lake Road over Little Manistee River	1964	3,000	Fair
M-115 over Dutchman Creek	1937	2,670	Fair