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Lake Shore Drive over Flintsteel River

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

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

Lake Shore Drive over Flintsteel River in Ontonagon 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 1980, making it 45 years old at the 2025 inventory.
It carries about 200 vehicles a day (traffic count year 1997).
Its listed owner is the county highway agency.
It is one of 25 of the 66 inventoried bridges in Ontonagon County rated good (37.9%); 10 (15.2%) 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 96 ft
Location	4 Mi E of Ontonagon
NBI structure number	000000000008520
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
M-64 & M-38 over Ontonagon R River Rd RR	2005	3,625	Fair
M-28 over So Br Ontonagon River	1990	2,398	Good
M-28 over M Br Ontonagon River	1929	2,303	Fair
M-28\|m-64 over Merryweather Creek	1932	2,120	Fair
M-64 over Cranberry River	1948	2,117	Fair
M-64 over Weigels Creek	1945	2,117	Fair