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M-37 over CSX RR Penoyer Creek

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

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

M-37 over CSX RR Penoyer Creek in Newaygo 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 1984 and reconstructed in 2007, making it 41 years old at the 2025 inventory.
It carries about 6,835 vehicles a day (traffic count year 2007).
Its listed owner is the state highway agency.
It is one of 32 of the 66 inventoried bridges in Newaygo County rated fair (48.5%); 6 (9.1%) 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 single box beam
Length	about 289 ft
Location	In Newaygo
NBI structure number	000000000007729
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
M-37 over Muskegon River	1953	15,989	Fair
M-37 over White River	1928	6,100	Fair
M-82 over CSX RR and Penoyer Creek	1986	5,811	Good
M-120 over Braton Creek	1935	5,638	Fair
M-20 over White River	1970	4,400	Fair
Muskegon Drive over Little Muskegon River	1958	3,300	Good