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1 St Ave. W over N Fork Maquoketa River

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

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

1 St Ave. W over N Fork Maquoketa River in Dubuque 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 1979 and reconstructed in 2000, making it 46 years old at the 2025 inventory.
It carries about 5,495 vehicles a day (traffic count year 2022).
Its listed owner is a city or municipal highway agency.
It is one of 141 of the 346 inventoried bridges in Dubuque County rated fair (40.8%); 25 (7.2%) 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 stringer or multi-beam girder
Length	about 153 ft
Location	000000000
NBI structure number	000000000024081
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 20 over N Branch Catfish Creek	1939	33,600	Fair
US 61 & 151 over Peosta Chl & City St	1991	22,300	Fair
US 61 & 151 over Mississippi River Island	1982	20,400	Fair
US 20 US 52 over Drainage Ditch	1957	18,500	Fair
US 20 over Miss. River Hwy & RR	1943	17,700	Fair
EB US 20 over Mid Br Catfish Ck Cc RR	1995	14,300	Good