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Onaway Rd over I-75 NB

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

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

Onaway Rd over I-75 NB in Cheboygan County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1962, making it 63 years old at the 2025 inventory.
It carries about 1,050 vehicles a day (traffic count year 1997).
Its listed owner is the state highway agency.
It is one of 45 of the 73 inventoried bridges in Cheboygan County rated fair (61.6%); 10 (13.7%) 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	Steel stringer or multi-beam girder
Length	about 195 ft
Location	0.6 Mi N of M-68
NBI structure number	000000000001509
Condition class	Fair

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