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Ih Ush 51-ih 39 SB over Wisconsin River 26

Marathon County, Wisconsin · rated Good in the 2025 National Bridge Inventory

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

Ih Ush 51-ih 39 SB over Wisconsin River 26 in Marathon County, Wisconsin, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1968 and reconstructed in 2014, making it 57 years old at the 2025 inventory.
It carries about 37,700 vehicles a day (traffic count year 2021).
Its listed owner is the state highway agency.
It is one of 203 of the 531 inventoried bridges in Marathon County rated good (38.2%); 40 (7.5%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 643 ft
Location	2.6M S Jct Sth 29 to E
NBI structure number	B37010800000000
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Ih Ush 51-ih 39 NB over Ush Bus 51 & R.R.	2012	39,600	Fair
Ih 39 Sb/ush 51 over Ush Bus 51	2013	39,600	Good
Ush 51NB over Lrd Stewart Ave	2009	38,600	Good
Ush 51 SB over Lrd Hwy 52 Parkway	2007	38,600	Good
Ush 51 NB over Lrd Sherman St	2007	34,100	Good
Ush 51SB over Lrd Sherman Ave	2007	34,100	Good