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FM Rd A-39 over I-35

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

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

FM Rd A-39 over I-35 in Worth 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 1970, making it 55 years old at the 2025 inventory.
It carries about 118 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 55 of the 116 inventoried bridges in Worth County rated fair (47.4%); 17 (14.7%) 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	Continuous steel stringer or multi-beam girder
Length	about 291 ft
Location	3.0 Mi. N of Jct. Ia #9
NBI structure number	000000000600150
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-35 over Drainage Ditch	1972	20,600	Good
I-35 over Goose Creek	1972	20,100	Fair
NB I 35 over over UP RR	1970	10,700	Fair
SB I 35 over over UP RR	1970	10,500	Fair
NB I-35 over Elk Creek	1972	9,950	Fair
SB I-35 over Elk Creek	1972	9,750	Fair