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Ia 9 over Sugar Creek

Mitchell County, Iowa · rated Good in the 2025 National Bridge Inventory

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

Ia 9 over Sugar Creek in Mitchell County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
It was built in 2013, making it 12 years old at the 2025 inventory.
It carries about 2,990 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 81 of the 167 inventoried bridges in Mitchell County rated good (48.5%); 16 (9.6%) are rated poor.
Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
Its condition class and component ratings are unchanged from the 2024 inventory.
Its most recent inspection on record is dated November 2023, on a 24-month routine inspection cycle.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings

Component	Rating (2024)	Rating (2025)	FHWA scale meaning
Culvert	8	8	Very good condition


Structure	Concrete culvert
Length	about 47 ft
Location	1.2 mi. W of jct. US 218
NBI structure number	000000000036521
Condition class	Good
Traffic status (item 41)	Open, no restriction
Last inspection (item 90)	November 2023
Inspection interval (item 91)	24 months
Scour (item 113)	8: foundations stable, scour above the top of the footing

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

Bridge	Built	Vehicles/day	Condition
Ia 9 over Cedar River	1992	2,990	Good
US 218 over Turtle Creek	1987	2,530	Good
US 218 over Stream	1986	2,530	Good
US 218 over Stream	1967	2,530	Good
US 218 over Otter Creek	1970	2,530	Fair
US 218 & Ia 9 over Spring Creek	1975	2,460	Fair