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I-75 SB over CSX RR

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

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

I-75 SB over CSX RR in Saginaw County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 2021, making it 4 years old at the 2025 inventory.
It carries about 32,900 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 165 of the 315 inventoried bridges in Saginaw County rated fair (52.4%); 58 (18.4%) 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 stringer or multi-beam girder
Length	about 121 ft
Location	0.3 Mi S of M-46
NBI structure number	000000000014326
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 NB over Cass River	1961	56,192	Good
I-75 US-10 over CSX RR	1961	47,480	Fair
I-75 US-10 over CSX RR	1958	46,000	Fair
I-75 SB over CSX RR	1958	38,000	Fair
I-75 NB over CSX RR	2021	32,900	Good
I-75 NB over CSX RR	1958	29,274	Fair