Home › Wisconsin › Iowa County › Cth Y over Mill Creek

Cth Y over Mill Creek

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

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

Cth Y over Mill Creek in Iowa 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 1976, making it 49 years old at the 2025 inventory.
It carries about 337 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 58 of the 209 inventoried bridges in Iowa County rated fair (27.8%); 11 (5.3%) 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	Prestressed concrete multiple box beam
Length	about 45 ft
Location	0.6M S Jct Cth H
NBI structure number	B25004100000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Ush 18-ush 151 over Br Dodge Branch	1979	14,600	Fair
Ush 18 Eb-ush 151 over Cth Id \| S. Jones Street	1988	7,850	Fair
Ush 18 Wb-ush 151 over Lrd S Jones St	1983	7,850	Fair
Ush 18 EB / Ush 15 over Lrd Ridgevue Rd	2018	7,650	Good
Ush 18 WB / Ush 15 over Lrd Ridgevue Road	2018	7,650	Good
Ush 18 Wb-ush 151 over Cth H	1982	7,600	Fair