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S County Line Road over Maple River

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

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

S County Line Road over Maple River in Gratiot County, Michigan, 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 1973, making it 52 years old at the 2025 inventory.
It carries about 139 vehicles a day (traffic count year 2004).
Its listed owner is the county highway agency.
It is one of 22 of the 167 inventoried bridges in Gratiot County rated poor (13.2%); 22 (13.2%) 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	Steel stringer or multi-beam girder
Length	about 99 ft
Location	Sec 33 Elba Twp
NBI structure number	000000000003189
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US-127 NB over US-127 Br	1961	15,400	Fair
US-127 SB over US-127 Br	1961	15,400	Fair
M-46 & US-127BR over US-127	1961	11,219	Poor
US-127 NB over Maple River	1988	10,831	Fair
US-127 SB over Maple River	1955	10,831	Good
US-127 Br over Pine River	1928	10,432	Fair