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Cth D over Namekagon Lake

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

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

Cth D over Namekagon Lake in Bayfield 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 1971, making it 54 years old at the 2025 inventory.
It carries about 575 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 6 of the 103 inventoried bridges in Bayfield County rated poor (5.8%); 6 (5.8%) 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 prestressed concrete stringer or multi-beam girder
Length	about 184 ft
Location	4.0M N Jct Cth M
NBI structure number	B04001800000000
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Ush 2-sth 13 over Fish Creek	1991	11,600	Fair
Ush 2-sth 13 over Fish Creek	1991	11,600	Fair
Sth 13 over Whittlesey Creek	1954	7,500	Fair
Sth 13 over Little Whittlesey Crk	1981	7,100	Fair
Sth 13 over Terwilliger Creek	2019	7,100	Good
Sth 13 over Boyd Creek	2020	7,100	Good