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US 61 over Millrace Creek

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

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

US 61 over Millrace Creek in Louisa County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1985, making it 40 years old at the 2025 inventory.
It carries about 4,950 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 81 of the 151 inventoried bridges in Louisa County rated fair (53.6%); 22 (14.6%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 269 ft
Location	5.9 mi S of S Jct IA 92
NBI structure number	000000000033961
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
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
US 61 over Honey Creek	1997	4,420	Good