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Local over Knotty Creek

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

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

Local over Knotty Creek in Des Moines 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 1972, making it 53 years old at the 2025 inventory.
It carries about 123 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 77 of the 173 inventoried bridges in Des Moines County rated fair (44.5%); 28 (16.2%) 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	Prestressed concrete tee beam
Length	about 41 ft
Location	071032501
NBI structure number	000000000143730
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 61 over US 34	1973	16,700	Fair
US 61 over Brush Creek	1995	10,200	Good
Gear Ave over US 34	1976	9,700	Fair
US 34 over Mississippi River	1994	7,500	Fair
US 34 over Bur Jun RR AND CITY STS	1971	7,500	Fair
EB US 34 over Broadway Ave	1976	6,550	Fair