Home › Wisconsin › Adams County › Sth 21 over Wisconsin River

Sth 21 over Wisconsin River

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

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

Sth 21 over Wisconsin River in Adams 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 1959 and reconstructed in 2002, making it 66 years old at the 2025 inventory.
It carries about 4,600 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 14 of the 42 inventoried bridges in Adams County rated fair (33.3%); 1 (2.4%) 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	Steel stringer or multi-beam girder
Length	about 886 ft
Location	2.2M E Jct Cth G
NBI structure number	B01001300000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Sth 13 over Carter Creek	1937	7,100	Fair
Sth 13-main St over Little Roche A Cri Creek	1993	7,020	Fair
Sth 13 over Fourteen Mile Creek	1957	5,800	Fair
Sth 21 over Wisconsin R Backwater	2010	4,300	Good
Sth 13 over Big Roche A Cri Lake	2012	4,200	Good
Sth 21 over Big Roche A Cri Creek	1950	3,700	Fair