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Ih 43 NB over Sth 120

Walworth County, Wisconsin · rated Fair in the 2025 National Bridge Inventory

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

Ih 43 NB over Sth 120 in Walworth County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1971, making it 54 years old at the 2025 inventory.
It carries about 11,550 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 136 of the 215 inventoried bridges in Walworth County rated fair (63.3%); 8 (3.7%) 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 prestressed concrete stringer or multi-beam girder
Length	about 210 ft
Location	8.0 Mi N Jct Sth 11
NBI structure number	B64009000000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Ih 43 over Br Jackson Creek	1976	23,700	Good
Ush 12 over White River	1967	22,200	Fair
Ih 43 over Br Jackson Creek	1976	21,900	Fair
Ush 12 over Como Creek	1967	21,700	Fair
Ih 43 over Swan Creek	1976	21,700	Fair
Ih 43 SB over Sth 20	1971	21,600	Fair