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N Sharon Road over Manistee River

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

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

N Sharon Road over Manistee River in Kalkaska 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 1971, making it 54 years old at the 2025 inventory.
It carries about 330 vehicles a day (traffic count year 2006).
Its listed owner is the county highway agency.
It is one of 7 of the 15 inventoried bridges in Kalkaska County rated fair (46.7%); 1 (6.7%) 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 89 ft
Location	15 Mi SE of Kalkaska
NBI structure number	000000000004700
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Us-131\|m-66\|m-72\|s over N Br Boardman River	1940	8,567	Fair
N Rapid City Road over Rapid River	1983	5,800	Good
Boardman Road over Boardman River	1988	1,700	Fair
Aarwood Road over Rapid River	2012	1,340	Good
M-66 over Manistee River	1979	1,150	Fair
W Sharon Road over Manistee River	1958	1,060	Good