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US 30 over Boyer River

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

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

US 30 over Boyer River in Crawford County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1959, making it 66 years old at the 2025 inventory.
It carries about 3,020 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 143 of the 301 inventoried bridges in Crawford County rated fair (47.5%); 23 (7.6%) 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 325 ft
Location	0.8 mi. E of SR M14
NBI structure number	000000000021260
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Ave C over West Boyer River	1985	7,347	Fair
Ave C over Cc RR	1999	7,158	Fair
US 30 over Drainage Ditch	1958	4,670	Fair
US 30 & 59 over over UP RR	1962	4,500	Fair
US 30 & 59 over East Boyer River	1962	4,500	Fair
US 30 & 59 over over UP RR	1962	4,400	Fair