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Red Bridge Road over Upper Black River

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

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

Red Bridge Road over Upper Black River in Cheboygan 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 1999, making it 26 years old at the 2025 inventory.
It carries about 140 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 18 of the 73 inventoried bridges in Cheboygan County rated good (24.7%); 10 (13.7%) 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 multiple box beam
Length	about 78 ft
Location	SEC.5 T35N R1E
NBI structure number	000000000001553
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Lincoln Avenue over Cheboygan River	2007	12,000	Fair
M-68\|s Straits Hwy over Sturgeon River	1927	10,873	Fair
I-75 SB over Trowbridge Rd	1962	7,875	Fair
I-75 NB over Trowbridge Rd	1962	7,875	Fair
I-75 SB over M-27\|s Straits Hwy	1962	7,777	Fair
I-75 NB over M-27\|s Straits Hwy	1962	7,777	Fair