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Union Road over Union and State Line Dr

Cass County, Michigan · rated Fair in the 2025 National Bridge Inventory

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

Union Road over Union and State Line Dr in Cass County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1983, making it 42 years old at the 2025 inventory.
It carries about 310 vehicles a day (traffic count year 2019).
Its listed owner is the county highway agency.
It is one of 32 of the 53 inventoried bridges in Cass County rated fair (60.4%); 8 (15.1%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 23 ft
Location	0.5 Mi S of Union
NBI structure number	000000000001448
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US-12 over M-60	1960	9,010	Fair
M-51 over Dowagiac Creek	1949	8,127	Fair
US-12 over Christiana Creek	1941	8,072	Fair
US-12 over Brandywine Creek	1982	7,438	Fair
M-62 over Dowagiac Creek	1950	7,355	Fair
US-12 over Valley Creek	2011	7,350	Good