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Sth 26 SB over Sth 59

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

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

Sth 26 SB over Sth 59 in Rock County, Wisconsin, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 2013, making it 12 years old at the 2025 inventory.
It carries about 8,450 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 168 of the 304 inventoried bridges in Rock County rated good (55.3%); 13 (4.3%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous prestressed concrete stringer or multi-beam girder
Length	about 170 ft
Location	3.8 Mi. S of Cth N
NBI structure number	B53025300000000
Condition class	Good

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