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Mackinaw Road over Augres River

Arenac County, Michigan · rated Poor in the 2025 National Bridge Inventory

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

Mackinaw Road over Augres River in Arenac County, Michigan, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 3 (serious condition) on the 0-9 scale.
It was built in 1985, making it 40 years old at the 2025 inventory.
It carries about 200 vehicles a day (traffic count year 2017).
Its listed owner is the county highway agency.
It is one of 12 of the 80 inventoried bridges in Arenac County rated poor (15.0%); 12 (15.0%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings

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

Bridge	Built	Vehicles/day	Condition
I-75 Nb\|us-23 NB over Sunsmith Drain	1968	27,470	Fair
US-23\|MAIN St over Middle Br Pine River	1994	14,971	Fair
Sterling Road over I-75 NB	1968	14,350	Poor
I-75 Sb\|us-23 SB over S Br Pine River	1968	13,735	Fair
I-75 Nb\|us-23 NB over S Br Pine River	1968	13,735	Fair
US-23\|W Huron Rd over N Br Pine River	2001	9,170	Good