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1ST Ave S over 21ST St & RR

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

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

1ST Ave S over 21ST St & RR in Webster 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 1968 and reconstructed in 1978, making it 57 years old at the 2025 inventory.
It carries about 9,860 vehicles a day (traffic count year 2021).
Its listed owner is a city or municipal highway agency.
It is one of 55 of the 190 inventoried bridges in Webster County rated fair (28.9%); 48 (25.3%) 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 1,043 ft
Location	089282000
NBI structure number	000000000005040
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 Holliday Creek	1986	9,800	Good
US 20 over Drainage Ditch #4	1986	9,500	Good
5TH Ave over Drainage Ditch	1955	8,894	Poor
N 15TH St over Soldier Creek	1974	8,798	Poor
US 20 over Drainage Ditch 69	2011	7,900	Good
Quail Ave over Quarry Haul Rd	2010	7,579	Good