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306TH St over Little Turkey River

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

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

306TH St over Little Turkey River in Fayette 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 8 (very good condition) on the 0-9 scale.
It was built in 1989, making it 36 years old at the 2025 inventory.
It carries about 44 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 125 of the 362 inventoried bridges in Fayette County rated good (34.5%); 97 (26.8%) 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	Continuous prestressed concrete stringer or multi-beam girder
Length	about 166 ft
Location	095100507
NBI structure number	000000000153391
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Ia 150 over Otter Creek	1979	5,400	Fair
Ia 3 & 150 over Otter Creek	1986	3,930	Fair
Ia 150 over Unnamed Creek	1928	3,290	Fair
Ia 150 over Stream	1969	3,290	Good
US 18 over Glover Creek	1976	3,110	Good
US 18 over Stream	1963	3,050	Fair