Home › Iowa › Carroll County › FM over West Nishnabotna River

FM over West Nishnabotna River

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

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

FM over West Nishnabotna River in Carroll 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 1970, making it 55 years old at the 2025 inventory.
It carries about 120 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 112 of the 249 inventoried bridges in Carroll County rated fair (45.0%); 17 (6.8%) 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

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

Bridge	Built	Vehicles/day	Condition
US 30 over Ditch #77	1919	13,000	Fair
US 30 over Storm Creek	1955	7,300	Fair
US 30 over over UP RR	1982	6,800	Fair
US 30 over Middle Raccoon River	1982	6,000	Fair
US 71 over UP RR & Rd	1988	5,600	Fair
US 71 over Stream	2000	5,600	Good