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Cth B over Rock River

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

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

Cth B over Rock River in Jefferson 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 1968 and reconstructed in 2005, making it 57 years old at the 2025 inventory.
It carries about 4,100 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 72 of the 182 inventoried bridges in Jefferson County rated fair (39.6%); 9 (4.9%) 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	Continuous prestressed concrete stringer or multi-beam girder
Length	about 214 ft
Location	0.7M E Jct Cth N
NBI structure number	B28005800000000
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 WB over Lrd Newville Rd	2024	43,300	Good
Ih 94 WB over Lrd Rock Lake Rd	2024	43,300	Good
Ih 94 EB over Lrd Willow Glen Rd	1963	24,600	Fair
Ih 94 WB over Lrd Willow Glen Rd	1963	24,600	Fair
Ih 94 EB over Cth P	1964	21,400	Fair
Ih 94 WB over Cth P	1964	21,400	Good