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Ush 51 over Manitowish River

Vilas County, Wisconsin · rated Poor in the 2025 National Bridge Inventory

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

Ush 51 over Manitowish River in Vilas County, Wisconsin, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1956 and reconstructed in 1992, making it 69 years old at the 2025 inventory.
It carries about 3,800 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 3 of the 29 inventoried bridges in Vilas County rated poor (10.3%); 3 (10.3%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 185 ft
Location	1.2M N Jct Cth W
NBI structure number	B63000300000000
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Ush 45-sth 17-sth over Eagle River	2000	14,000	Fair
Sth 17-sth 70 over Mud Creek	1981	9,600	Fair
Sth 70 over Wisconsin River 53	1993	6,000	Fair
Sth 70 over Link Creek	1988	5,700	Fair
Sth 47 over Mishonagon Creek	2008	4,800	Good
Sth 70 over Saint Germain River	1968	4,300	Fair