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Ush 51 over Spider Lake

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

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

Ush 51 over Spider Lake in Vilas 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 1998, making it 27 years old at the 2025 inventory.
It carries about 4,300 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 13 of the 29 inventoried bridges in Vilas County rated good (44.8%); 3 (10.3%) 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	Prestressed concrete stringer or multi-beam girder
Length	about 83 ft
Location	5.0M N Jct Cth H
NBI structure number	B63001800000000
Condition class	Good

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