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FM over Small Stream

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

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

FM over Small Stream in Sioux 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 1962, making it 63 years old at the 2025 inventory.
It carries about 34 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 14 of the 448 inventoried bridges in Sioux County rated poor (3.1%); 14 (3.1%) 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	Steel stringer or multi-beam girder
Length	about 57 ft
Location	097451501
NBI structure number	000000000312720
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 75 over W Fork Floyd River	1989	7,300	Good
US 75 over Stream	1998	7,300	Good
US 18 over Rogg Creek	1985	6,700	Good
Ia 60 over Stream	1991	6,500	Good
Ia 10 over Floyd River	1993	5,300	Fair
US 18 over Drainage Ditch	1976	5,200	Fair