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FM over Twelve Mile Creek

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

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

FM over Twelve Mile Creek in Union 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 5 (fair condition) on the 0-9 scale.
It was built in 1956, making it 69 years old at the 2025 inventory.
It carries about 128 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 64 of the 172 inventoried bridges in Union County rated fair (37.2%); 55 (32.0%) 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	Continuous steel stringer or multi-beam girder
Length	about 126 ft
Location	072293403
NBI structure number	000000000325750
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 34 over Br. East Platte River	1971	4,890	Fair
US 34 over over BNSF RR	1971	4,890	Fair
US 34 over Twelve Mile Creek	1971	4,890	Fair
US 34 over Twelve Mile Creek	1971	4,890	Fair
Ia 25 over Stream	1976	4,870	Fair
US 169 over BNSF RR	1980	3,870	Good