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Lake Harbor Road over Mona Lake Channel

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

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

Lake Harbor Road over Mona Lake Channel in Muskegon 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 5 (fair condition) on the 0-9 scale.
It was built in 1982, making it 43 years old at the 2025 inventory.
It carries about 8,000 vehicles a day (traffic count year 2019).
Its listed owner is a city or municipal highway agency.
It is one of 99 of the 143 inventoried bridges in Muskegon County rated fair (69.2%); 16 (11.2%) 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 140 ft
Location	In Norton Shores
NBI structure number	000000000007703
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US-31 over I-96	1959	62,644	Fair
US-31 NB over Mi Shore RR & Laketon Av	1960	32,065	Fair
US-31 NB over Black Creek	1959	31,322	Fair
US-31 SB over Black Creek	1949	31,322	Fair
I-96 over Hile Rd	1961	31,000	Fair
I-96 EB over Airline Road	1961	29,245	Fair