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WB US 6 & SB 14 over I-80

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

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

WB US 6 & SB 14 over I-80 in Jasper 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 1962 and reconstructed in 2011, making it 63 years old at the 2025 inventory.
It carries about 3,300 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 126 of the 382 inventoried bridges in Jasper County rated fair (33.0%); 108 (28.3%) 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	Continuous steel stringer or multi-beam girder
Length	about 235 ft
Location	at Jct. I-80
NBI structure number	000000000030620
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 Drainage Ditch	1959	33,400	Fair
I-80 over Elk Creek	1961	30,500	Fair
I-80 over Drainage Ditch	1961	30,500	Fair
EB I-80 over West 148TH St South	1959	18,350	Fair
EB I-80 over South Skunk River	1960	18,350	Fair
WB I-80 over West 148TH Street South	1959	18,050	Fair