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Ia 3 over Des Moines River

Humboldt County, Iowa · rated Good in the 2025 National Bridge Inventory

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

Ia 3 over Des Moines River in Humboldt County, Iowa, 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 2010, making it 15 years old at the 2025 inventory.
It carries about 2,850 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 34 of the 87 inventoried bridges in Humboldt County rated good (39.1%); 7 (8.0%) 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	Prestressed concrete stringer or multi-beam girder
Length	about 412 ft
Location	1.6 mi. W of US 169
NBI structure number	000000000028981
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 169 over W Fork Des Moines River	1997	7,100	Fair
US 169 over Indian Creek	2011	5,400	Good
Ia 3 over Stream	1939	4,590	Good
Sumner Ave SW over West Des Moines River	2015	3,472	Good
US 169 over Drainage Ditch	1985	3,220	Fair
US 169 over Bloody Run Creek	1985	3,220	Fair