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Csah 21 over Pike River

St. Louis County, Minnesota · rated Poor in the 2025 National Bridge Inventory

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

Csah 21 over Pike River in St. Louis County, Minnesota, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1957, making it 68 years old at the 2025 inventory.
It carries about 1,750 vehicles a day (traffic count year 2019).
Its listed owner is the county highway agency.
It is one of 41 of the 670 inventoried bridges in St. Louis County rated poor (6.1%); 41 (6.1%) 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 channel beam
Length	about 78 ft
Location	0.3 Mi E of Jct Th 169
NBI structure number	7184
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
I 35 over Miller & Coffee Creek	2022	46,000	Good
I 35 over Unstable Material	1970	45,454	Fair
I 35 over Recycle Way	2011	38,802	Good
I 35 over I 35 NB Off Ramp	1965	35,500	Fair
I 35 over Abandoned City St	1969	35,500	Fair
I 535 over SB Garfield; BNSF RR	1969	28,098	Fair