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Local over Small Stream

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

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

Local over Small Stream in Louisa County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 7 (good condition) on the 0-9 scale.
It was built in 1997, making it 28 years old at the 2025 inventory.
It carries about 82 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 48 of the 151 inventoried bridges in Louisa County rated good (31.8%); 22 (14.6%) 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 54 ft
Location	075050104
NBI structure number	000000000224621
Condition class	Good

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