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Sth 57 over Baileys Harbor Marsh

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

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

Sth 57 over Baileys Harbor Marsh in Door 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 8 (very good condition) on the 0-9 scale.
It was built in 2017, making it 8 years old at the 2025 inventory.
It carries about 4,500 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 15 of the 33 inventoried bridges in Door County rated good (45.5%); 1 (3.0%) 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	Prestressed concrete multiple box beam
Length	about 41 ft
Location	2.70 Mi N of Cth Q
NBI structure number	B15002600000000
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Sth 42 - Sth 57 over Sturgeon Bay	1978	14,200	Fair
Sth 42 - Sth 57 over Sturgeon Bay	1978	12,500	Fair
Sth 42 - Sth 57 over Sturgeon Bay	1978	12,500	Fair
Sth 42 - Sth 57 over Sturgeon Bay	1978	12,500	Fair
Sth 42 - Sth 57 over Lrd Memorial Dr	1978	12,500	Fair
Sth 57 NB over Fabry CR	2008	11,200	Fair