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Old State Rd over E Br of Au Gres River

Iosco County, Michigan · rated Fair in the 2025 National Bridge Inventory

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

Old State Rd over E Br of Au Gres River in Iosco County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1977, making it 48 years old at the 2025 inventory.
It carries about 720 vehicles a day (traffic count year 2006).
Its listed owner is the county highway agency.
It is one of 32 of the 47 inventoried bridges in Iosco County rated fair (68.1%); 3 (6.4%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 40 ft
Location	2.25 M W of Sand Lake Rd
NBI structure number	000000000004136
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US-23 over Tawas River	1984	15,836	Fair
F 41 over Van Ettan Creek	1979	12,300	Fair
US-23 over Au Sable River	1972	8,367	Fair
M-55\|hemlock St over Tawas River	1950	8,047	Fair
M-65 over Hale Creek	1952	6,737	Fair
US-23 over Private Road	1931	5,497	Fair