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C 47 over I-35

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

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

C 47 over I-35 in Franklin 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 1972, making it 53 years old at the 2025 inventory.
It carries about 1,159 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 96 of the 227 inventoried bridges in Franklin County rated fair (42.3%); 28 (12.3%) 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 325 ft
Location	at Jct. I-35 & SR C47
NBI structure number	000000000602455
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	17,300	Good
I-35 over Drainage Ditch	1973	17,000	Good
I-35 over Drainage Ditch	1972	16,900	Fair
I-35 over Stream	1974	15,300	Fair
I-35 over Drainage Ditch NO.48	1974	15,100	Good
NB I-35 over Buffalo Creek	1973	8,600	Good