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FM E-41 over Stream

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

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

FM E-41 over Stream in Boone 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 5 (fair condition) on the 0-9 scale.
It was built in 1970, making it 55 years old at the 2025 inventory.
It carries about 450 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 58 of the 134 inventoried bridges in Boone County rated fair (43.3%); 38 (28.4%) 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 May 2024, on a 24-month routine inspection cycle.
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 (2024)	Rating (2025)	FHWA scale meaning
Culvert	5	5	Fair condition


Structure	Continuous concrete culvert
Length	about 21 ft
Location	083270604
NBI structure number	000000000362705
Condition class	Fair
Traffic status (item 41)	Open, no restriction
Last inspection (item 90)	May 2024
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
US 30 over Noah Creek	1962	8,800	Fair
US 30 over Honey Creek	1962	8,800	Fair
US 30 & 169 over East Beaver Creek	1962	5,900	Good
Ia 17 over Big Creek	1961	5,300	Fair
Ia 17 over US 30	1968	4,960	Fair
US 30 EB over Des Moines River	1963	4,400	Fair