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Ia 9 over W Fork Little Sioux Rvr

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

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

Ia 9 over W Fork Little Sioux Rvr in Dickinson County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1929 and reconstructed in 1963, making it 96 years old at the 2025 inventory.
It carries about 4,310 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 13 of the 83 inventoried bridges in Dickinson County rated poor (15.7%); 13 (15.7%) 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


Structure	Continuous steel stringer or multi-beam girder
Length	about 66 ft
Location	4.9 mi. W of IA 86
NBI structure number	000000000023700
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 71 over E to W Okoboji Lkes Conn	1999	14,600	Good
Ia 9 over Inlet W Okoboji Lake	1971	8,500	Fair
US 71 & Ia 9 over East Okoboji Lake	1939	8,200	Fair
US 71 & Ia 9 over Dry Run Creek	1978	5,400	Good
Ia 9 over Little Sioux River	1971	4,310	Good
FM over Lake Channel	2006	4,040	Good