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I 90 over Th 4

Martin County, Minnesota · rated Fair in the 2025 National Bridge Inventory

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

I 90 over Th 4 in Martin County, Minnesota, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1972, making it 53 years old at the 2025 inventory.
It carries about 4,300 vehicles a day (traffic count year 2016).
Its listed owner is the state highway agency.
It is one of 48 of the 162 inventoried bridges in Martin County rated fair (29.6%); 39 (24.1%) 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 187 ft
Location	at the Jct Th 4
NBI structure number	46805
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Mn 15 over Center Creek	1973	11,176	Good
I 90 over E Fk Des Moines River	1973	8,600	Fair
I 90 over E Fk Des Moines River	1972	8,600	Fair
I 90 over Stream	1972	8,600	Good
I 90 over E Fk Des Moines River	1973	8,600	Good
I 90 over South Creek	1972	8,111	Fair