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I-75 NB over Lake State RR

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

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

I-75 NB over Lake State RR in Otsego 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 6,791 vehicles a day (traffic count year 2007).
Its listed owner is the state highway agency.
It is one of 20 of the 25 inventoried bridges in Otsego County rated fair (80.0%); 2 (8.0%) 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 192 ft
Location	2.7 Mi S of M-32
NBI structure number	000000000008670
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-75 Bl\|old 27 over I-75 NB	1961	12,725	Fair
I-75 SB over Charles Brink Rd	1961	7,041	Fair
I-75 NB over Charles Brink Rd	1961	7,041	Fair
I-75 SB over Lake State RR	1962	6,791	Fair
I-75 SB over M-32\|w Main St	1961	6,791	Poor
I-75 NB over M-32\|w Main St	1961	6,791	Poor