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Csah 40 over Big Fork River

Itasca County, Minnesota · rated Poor in the 2025 National Bridge Inventory

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

Csah 40 over Big Fork River in Itasca County, Minnesota, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1980, making it 45 years old at the 2025 inventory.
It carries about 110 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 8 of the 171 inventoried bridges in Itasca County rated poor (4.7%); 8 (4.7%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Prestressed concrete tee beam
Length	about 174 ft
Location	1.0 Mi N of Jct Th 1
NBI structure number	31522
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 169 over Mississippi River	1932	16,400	Good
Msas 119 over Mississippi River	1975	10,300	Fair
US 2 over Bass Brook	1931	9,600	Fair
US 169 over Csah 61	1966	9,100	Good
US 169 over Pokegama Lake	2006	8,800	Fair
M 30 over US 169	1966	8,600	Fair