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Ia 48 over Red Oak Creek

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

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

Ia 48 over Red Oak Creek in Montgomery 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 1918 and reconstructed in 1951, making it 107 years old at the 2025 inventory.
It carries about 4,460 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 113 of the 209 inventoried bridges in Montgomery County rated fair (54.1%); 52 (24.9%) 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	Steel stringer or multi-beam girder
Length	about 41 ft
Location	1.3 Mi S of Jct. US 34
NBI structure number	000000000037710
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Ia 48 over Stream	1931	7,600	Fair
US 34 over East Nishnabotna River	1964	4,460	Fair
US 34 over Indian Creek	1964	4,030	Fair
US 34 over Crabapple Creek	1964	4,030	Fair
US 34 over West Tarkio Creek	1964	3,990	Fair
US 34 over Tarkio River	1964	3,990	Fair