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Ia 128 over Dry Mill Creek

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

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

Ia 128 over Dry Mill Creek in Clayton County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1979, making it 46 years old at the 2025 inventory.
It carries about 1,420 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 78 of the 257 inventoried bridges in Clayton County rated good (30.4%); 38 (14.8%) 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 202 ft
Location	2.4 Mi. E of Jct. Ia 13
NBI structure number	000000000020691
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 18 over Mississippi River Ia 76	1974	10,100	Fair
Ia 13 over Roberts Creek	1979	4,900	Good
Bridge St over Turkey River	1889	4,755	Fair
US 18 over Unnamed Creek	1988	4,730	Fair
US 18 & 52 over Branch Roberts Creek	1967	4,140	Fair
US 18 over Bloody Run & Dme RR	1988	4,140	Fair