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Long Bridge Rd over Pentwater River

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

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

Long Bridge Rd over Pentwater River in Oceana 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 1964, making it 61 years old at the 2025 inventory.
It carries about 2,000 vehicles a day (traffic count year 2005).
Its listed owner is the county highway agency.
It is one of 64 of the 101 inventoried bridges in Oceana County rated fair (63.4%); 5 (5.0%) 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 120 ft
Location	1 Mi SE of Pentwater
NBI structure number	000000000008371
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 SB over Grant Road	1975	10,300	Fair
US-31 NB over Grant Road	1975	10,300	Fair
US-31BR over Russell Creek	2020	8,800	Good
US-31 SB over Log Rd & CSX RR (abn)	1975	8,500	Fair
US-31 NB over Log Rd & CSX RR (abn)	1975	8,500	Fair
US-31 SB over Buchanan Road	1975	8,500	Fair