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Csah 4 over S Fk Root River

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

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

Csah 4 over S Fk Root River in Houston County, Minnesota, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1971, making it 54 years old at the 2025 inventory.
It carries about 189 vehicles a day (traffic count year 2021).
Its listed owner is the county highway agency.
It is one of 58 of the 170 inventoried bridges in Houston County rated fair (34.1%); 5 (2.9%) 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	Continuous steel stringer or multi-beam girder
Length	about 186 ft
Location	0.1 Mi S of Jct Csah 15
NBI structure number	28505
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 61 over Ditch	1926	16,334	Fair
US 61 over Im Rail and Street	2007	15,200	Good
Mn 16 over Pine Creek	1990	10,031	Fair
Mn 16 over Pine Creek	1931	10,031	Fair
US 61 over Mississippi River	1993	9,000	Good
US 61 over Mississippi River	1992	7,600	Fair