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Sth 42 over East Twin River

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

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

Sth 42 over East Twin River in Manitowoc County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 2002, making it 23 years old at the 2025 inventory.
It carries about 7,100 vehicles a day (traffic count year 2021).
Its listed owner is a city or municipal highway agency.
It is one of 142 of the 277 inventoried bridges in Manitowoc County rated fair (51.3%); 13 (4.7%) 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 multiple box beam
Length	about 494 ft
Location	0.2M N Jct. Sth 147
NBI structure number	B36015500000000
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 Fischer Creek	1976	24,400	Fair
Ih 43 over Calvin Creek	1978	23,200	Fair
Ih 43 over Silver Creek	1978	23,200	Fair
Ih 43 over Pine Creek	1978	22,500	Fair
Sth 42 over Manitowoc River	1987	20,634	Good
Sth 42 over Manitowoc River	1987	20,634	Good