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Irr Bia Rte 51 over So. Branch Oconto River

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

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

Irr Bia Rte 51 over So. Branch Oconto River in Menominee County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1977, making it 48 years old at the 2025 inventory.
It carries about 70 vehicles a day (traffic count year 2024).
It is one of 12 of the 25 inventoried bridges in Menominee County rated fair (48.0%); 2 (8.0%) 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

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

Bridge	Built	Vehicles/day	Condition
Sth Irr (sth 47) over Wolf River	1986	3,000	Fair
Sth Irr (sth 47) over W Br Wolf River	1971	2,200	Fair
Cth M over West Branch of Wolf Rive	2020	602	Good
Sth Irr (sth 47) over W Br Wolf River	2004	510	Good
Irr Bia Rte 146 over West Branch Wolf River	1981	450	Fair
Irr Bia Rte 1024 over Wolf River	1960	350	Good