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NB US 65 over Winnebago River

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

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

NB US 65 over Winnebago River in Cerro Gordo 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 1969, making it 56 years old at the 2025 inventory.
It carries about 3,300 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 119 of the 268 inventoried bridges in Cerro Gordo County rated good (44.4%); 14 (5.2%) 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 221 ft
Location	0.1 mi. N of S Jct SR B20
NBI structure number	000000000019000
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-35 over Calmus Creek	1970	21,400	Fair
Ia 122 over Cheslea Creek	2010	18,800	Good
I-35 over Drainage Ditch	1972	18,100	Good
I-35 over Drainage Ditch	1972	17,700	Fair
I-35 over Drainage Ditch	1971	17,600	Fair
I 35 over Drainage Ditch	1972	17,600	Fair