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Cth J over Little Turtle Creek

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

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

Cth J over Little Turtle Creek in Rock County, Wisconsin, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1976, making it 49 years old at the 2025 inventory.
It carries about 272 vehicles a day (traffic count year 2024).
Its listed owner is the county highway agency.
It is one of 13 of the 304 inventoried bridges in Rock County rated poor (4.3%); 13 (4.3%) 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

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

Bridge	Built	Vehicles/day	Condition
Ih 39 /ih 90 over Br Rock River	2018	57,700	Good
Ih 39 SB / Ih 90 E over Spring Brook / Spring Br	2019	38,500	Good
Ih 39 NB / Ih 90 W over Spring Brook / Spring Br	2018	38,500	Good
Ih 39 SB / Ih 90 E over Cth O	2003	32,550	Good
Ih 39 NB/90 WB over Cth O/ East Delavan Road	2004	32,550	Good
Ih 39 SB / Ih 90 E over Cnw RR	2019	32,550	Good