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FM over Field Drainage Ditch

Madison County, Iowa · rated Poor in the 2025 National Bridge Inventory

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

FM over Field Drainage Ditch in Madison County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 4 (poor condition) on the 0-9 scale.
It was built in 1951 and reconstructed in 1966, making it 74 years old at the 2025 inventory.
It carries about 417 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 82 of the 225 inventoried bridges in Madison County rated poor (36.4%); 82 (36.4%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	4	Poor condition


Structure	Continuous concrete culvert
Length	about 23 ft
Location	074261601
NBI structure number	000000000231680
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
I-80 over Drainage Ditch	1959	27,600	Fair
US 169 over Cedar Creek	1990	5,900	Good
US 169 over North River	1969	4,280	Fair
US 169 over N Branch North River	1983	4,280	Fair
US 169 over Stream	1944	4,280	Fair
FM over Middle River	1996	2,091	Fair