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Sth 40-main St over Eighteen Mile Creek

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

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

Sth 40-main St over Eighteen Mile Creek in Dunn 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 5 (fair condition) on the 0-9 scale.
It was built in 1934 and reconstructed in 1989, making it 91 years old at the 2025 inventory.
It carries about 4,000 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 151 of the 244 inventoried bridges in Dunn County rated fair (61.9%); 20 (8.2%) 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 77 ft
Location	2.2M N Jct Cth B
NBI structure number	B17098400000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Ih 94 over Br Muddy Creek	1958	37,900	Fair
Ih 94 over Muddy Creek	1959	37,900	Fair
Ih 94 over E Br Wilson Creek	1959	35,500	Poor
Ih 94 over E Br Muddy Creek	1959	31,900	Fair
Ih 94 WB over Elk Mound Marsh Equalizr	1958	18,950	Fair
Ih 94 EB over Elk Mound Marsh Equalizr	1958	18,950	Fair