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South Market St over W Br Little Sioux River

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

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

South Market St over W Br Little Sioux River in Dickinson County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1967, making it 58 years old at the 2025 inventory.
It carries about 2,277 vehicles a day (traffic count year 2022).
Its listed owner is a city or municipal highway agency.
It is one of 33 of the 83 inventoried bridges in Dickinson County rated fair (39.8%); 13 (15.7%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition


Structure	Continuous concrete culvert
Length	about 24 ft
Location	100382706
NBI structure number	000000000023770
Condition class	Fair

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 W Fork Little Sioux Rvr	1929	4,310	Poor
Ia 9 over Little Sioux River	1971	4,310	Good