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North Union Street over Boardman River

Grand Traverse County, Michigan · rated Poor in the 2025 National Bridge Inventory

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

North Union Street over Boardman River in Grand Traverse County, Michigan, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1955, making it 70 years old at the 2025 inventory.
It carries about 4,803 vehicles a day (traffic count year 2022).
Its listed owner is a city or municipal highway agency.
It is one of 2 of the 33 inventoried bridges in Grand Traverse County rated poor (6.1%); 2 (6.1%) 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	Steel stringer or multi-beam girder
Length	about 99 ft
Location	In Traverse City
NBI structure number	000000000003075
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Us-31\|m-37\|m-72\|gr over Boardman River	1951	26,650	Good
Three Mile Road over Mitchell Creek	2006	24,586	Good
S Airport Road over Boardman River	1977	21,860	Fair
Beitner Road over Boardman River	1980	19,628	Poor
S Airport Road over Boardman River	1961	18,938	Fair
M-37 over Mdot RR Corridor	1965	16,500	Fair