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FM over Small Stream

Louisa 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 Louisa 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 1972, making it 53 years old at the 2025 inventory.
It carries about 45 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 22 of the 151 inventoried bridges in Louisa County rated poor (14.6%); 22 (14.6%) 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	Concrete stringer or multi-beam girder
Length	about 43 ft
Location	073030704
NBI structure number	000000000223641
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 61 over Millrace Creek	1985	4,950	Fair
US 61 over Overflow Iowa River	1985	4,950	Fair
US 61 over Overflow Iowa River	1985	4,950	Fair
US 61 over Overflow Iowa River	1985	4,950	Fair
US 61 over Muskrat Lake	1985	4,950	Fair
US 61 over Iowa River	1980	4,950	Fair