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Local over Drainage Ditch

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

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

Local over Drainage Ditch in Humboldt County, Iowa, 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 1948, making it 77 years old at the 2025 inventory.
It carries about 15 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 7 of the 87 inventoried bridges in Humboldt County rated poor (8.0%); 7 (8.0%) 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	Steel stringer or multi-beam girder
Length	about 23 ft
Location	091293302
NBI structure number	000000000184580
Condition class	Poor

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