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710TH St over I-80

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

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

710TH St over I-80 in Cass County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1959, making it 66 years old at the 2025 inventory.
It carries about 41 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 112 of the 296 inventoried bridges in Cass County rated fair (37.8%); 104 (35.1%) 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 223 ft
Location	4.0 Mi. W of Iowa 148
NBI structure number	000000000018160
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 Camp Creek	1965	23,500	Fair
I-80 over Drainage Ditch	1959	23,000	Fair
I-80 over Stream	1965	22,400	Fair
I 80 EB over Indian Creek	2013	11,800	Good
I 80 WB over Indian Creek	2014	11,800	Good
EB I-80 over 570TH St	1966	11,750	Fair