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M-25 over Schram Drain

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

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

M-25 over Schram Drain in Huron County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1975, making it 50 years old at the 2025 inventory.
It carries about 1,500 vehicles a day (traffic count year 2011).
Its listed owner is the state highway agency.
It is one of 116 of the 192 inventoried bridges in Huron County rated fair (60.4%); 14 (7.3%) 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 74 ft
Location	5.6 Mi SW of Port Austin
NBI structure number	000000000003451
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Anton Street over Sebewaing River	2013	5,590	Good
M-142 over Pinnebog River	1946	5,274	Good
M-142\|pigeon Rd over Nettle Run	2012	5,200	Good
M-25 over Sebewaing River	1949	5,123	Fair
Center Street over Sebewaing River	2003	4,900	Fair
M-25 over Pigeon River	1929	4,865	Good