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FM V-66 over I-80

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

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

FM V-66 over I-80 in Iowa County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1963, making it 62 years old at the 2025 inventory.
It carries about 3,810 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 90 of the 239 inventoried bridges in Iowa County rated good (37.7%); 45 (18.8%) 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 June 2024, 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
Deck	7	7	Good condition
Superstructure	7	7	Good condition
Substructure	7	7	Good condition


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 227 ft
Location	3.0 Mi. W of Jct. Ia 149
NBI structure number	000000000029810
Condition class	Good
Traffic status (item 41)	Open, no restriction
Last inspection (item 90)	June 2024
Inspection interval (item 91)	24 months
Scour (item 113)	N: not over a waterway

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

Bridge	Built	Vehicles/day	Condition
I-80 over Clear Creek	1963	33,800	Good
I 80 over Stream	1963	33,000	Fair
I-80 over No Name Creek	1963	31,400	Fair
I-80 over Stream	1962	30,300	Fair
I-80 over Old Mans Creek	1962	30,100	Fair
I-80 over Stream	1961	29,700	Good