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Monroe Rd over N Br Pentwater River

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

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

Monroe Rd over N Br Pentwater River in Oceana 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 2001, making it 24 years old at the 2025 inventory.
It carries about 3,377 vehicles a day (traffic count year 2007).
Its listed owner is the county highway agency.
It is one of 32 of the 101 inventoried bridges in Oceana County rated good (31.7%); 5 (5.0%) 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


Structure	Prestressed concrete single box beam
Length	about 174 ft
Location	2.7 Mi SE of Pentwater
NBI structure number	000000000008319
Condition class	Good

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