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Csah 30 over Watonwan River

Blue Earth County, Minnesota · rated Good in the 2025 National Bridge Inventory

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

Csah 30 over Watonwan River in Blue Earth County, Minnesota, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1957, making it 68 years old at the 2025 inventory.
It carries about 108 vehicles a day (traffic count year 2021).
Its listed owner is the county highway agency.
It is one of 88 of the 193 inventoried bridges in Blue Earth County rated good (45.6%); 12 (6.2%) 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	Concrete girder and floorbeam
Length	about 134 ft
Location	0.2 Mi E of Jct Csah 31
NBI structure number	7189
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 14 over Minn River; Trail	1976	39,000	Fair
US 14 over Th 169	1976	39,000	Fair
US 169 over Minn R UP RR; Str	1960	34,432	Fair
US 169 over Sibley St	1992	23,523	Fair
US 169 over Off Ramp From US 169	1987	23,523	Fair
Unu 169 over Minn R UP RR; Street	1985	22,949	Poor