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Cth Cc over Black Brook Flowage

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

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

Cth Cc over Black Brook Flowage in Polk 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 1986, making it 39 years old at the 2025 inventory.
It carries about 450 vehicles a day (traffic count year 2024).
Its listed owner is the county highway agency.
It is one of 16 of the 72 inventoried bridges in Polk County rated poor (22.2%); 16 (22.2%) 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


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 91 ft
Location	1.6M N Jct Sth 46
NBI structure number	B48002200000000
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Ush 8 over St Croix River 07	1955	14,900	Fair
Ush 8 over Lrd Interstate Park Rd	1956	14,000	Fair
Ush 8 EB over Sth 35 SB / S Vincent St	1995	9,000	Fair
Sth 35 over Osceola CR	2006	7,700	Fair
Ush 8 WB over Sth 35 SB / S Vincent St	1995	7,450	Fair
Ush 8-sth 46 over Apple River	1973	7,400	Fair