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M-18 over S Br Little Sugar River

Gladwin County, Michigan · rated Good in the 2025 National Bridge Inventory

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

M-18 over S Br Little Sugar River in Gladwin County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1923, making it 102 years old at the 2025 inventory.
It carries about 5,963 vehicles a day (traffic count year 2007).
Its listed owner is the state highway agency.
It is one of 24 of the 63 inventoried bridges in Gladwin County rated good (38.1%); 4 (6.3%) 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

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

Bridge	Built	Vehicles/day	Condition
M-18\|m-61\|w Cedar over Cedar Creek	2001	13,231	Fair
M-18 over Tobacco River	1939	6,100	Poor
M-18 over Farm Drain	1937	5,052	Fair
M-30 over Tobacco River	2021	4,100	Good
M-30 over Larabee Creek	1977	3,517	Good
M-61 over Tittabawassee River	1958	3,302	Fair