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I-75 SB over N Br Kawkawlin River

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

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

I-75 SB over N Br Kawkawlin River in Bay County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
It was built in 1968 and reconstructed in 2021, making it 57 years old at the 2025 inventory.
It carries about 11,638 vehicles a day (traffic count year 2021).
Its listed owner is the state highway agency.
It is one of 46 of the 166 inventoried bridges in Bay County rated good (27.7%); 27 (16.3%) 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	Continuous steel stringer or multi-beam girder
Length	about 134 ft
Location	5.0 Mi N of Kawkawlin
NBI structure number	000000000000608
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-75 NB over Squaconning Creek	1960	57,600	Fair
I-75 SB over Squaconning Creek	1960	57,600	Fair
I-75 NB over Goetz Drain	2010	53,002	Good
I-75 NB over Hesr	1960	44,350	Poor
US-10 EB over Gtw RR	1961	35,800	Fair
US-10 WB over Gtw RR	1961	35,800	Fair