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Polk Road over Shad Creek Drain

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

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

Polk Road over Shad Creek Drain 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 substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1936 and reconstructed in 1986, making it 89 years old at the 2025 inventory.
It carries about 83 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	Prestressed concrete multiple box beam
Length	about 23 ft
Location	Sec 19-30 Lafayette Twp
NBI structure number	000000000003210
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