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WB I-80 over Co Rd (p-57)

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

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

WB I-80 over Co Rd (p-57) in Dallas 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 5 (fair condition) on the 0-9 scale.
It was built in 1966, making it 59 years old at the 2025 inventory.
It carries about 14,550 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 92 of the 206 inventoried bridges in Dallas County rated fair (44.7%); 18 (8.7%) 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 145 ft
Location	At the Jct. SR P57
NBI structure number	000000000022240
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-80 over Panther Creek	1965	32,100	Good
I-80 over Bear Creek	1965	29,500	Good
EB I-80 over over UP RR	1966	27,550	Fair
WB I-80 over over UP RR	1966	26,850	Fair
EB I-80 over Sugar Creek	1966	24,500	Fair
WB I-80 over Sugar Creek	1966	24,050	Fair