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Irr Bia Rte 5 over Nett Lake River

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

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

Irr Bia Rte 5 over Nett Lake River in Koochiching 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 5 (fair condition) on the 0-9 scale.
It was built in 1962, making it 63 years old at the 2025 inventory.
It carries about 30 vehicles a day (traffic count year 2023).
It is one of 41 of the 98 inventoried bridges in Koochiching County rated fair (41.8%); 6 (6.1%) 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	Steel stringer or multi-beam girder
Length	about 49 ft
Location	3.7 Km North of Hwy 65
NBI structure number	00000000000F211
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Mn 11 over Stream	1949	5,227	Fair
Mn 11 over Dwp RR	2018	3,565	Good
US 53 over Rat Root River	1976	2,833	Fair
Mn 11 over Jack Fish Bay	2012	2,016	Good
Mn 11 over Tilson Creek	2012	2,016	Good
US 53 over E Br Rat Root River	1964	1,733	Good