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Forest Lake R FH79 over Au Train River

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

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

Forest Lake R FH79 over Au Train River in Alger 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 1977, making it 48 years old at the 2025 inventory.
It carries about 500 vehicles a day (traffic count year 1995).
Its listed owner is the county highway agency.
It is one of 16 of the 53 inventoried bridges in Alger County rated good (30.2%); 7 (13.2%) 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 82 ft
Location	1.44 Mi S of Au Train
NBI structure number	000000000000060
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
M-28 over Anna River	1949	7,171	Fair
East Munising Ave over Anna River	1978	5,715	Fair
M-28 over Au Train River	1932	5,200	Fair
US-41 over Huber Creek	1987	3,609	Fair
M-28 over Sand River	1939	3,093	Fair
M-28 over Laughing Whitefish River	1939	3,093	Good