Home › Michigan › Isabella County › E County Line Road over Onion Creek

E County Line Road over Onion Creek

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

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

E County Line Road over Onion Creek in Isabella 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 1990, making it 35 years old at the 2025 inventory.
It carries about 336 vehicles a day (traffic count year 2015).
Its listed owner is the county highway agency.
It is one of 85 of the 183 inventoried bridges in Isabella County rated good (46.4%); 26 (14.2%) 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 multiple box beam
Length	about 40 ft
Location	Sec 25 E Chippewa Twp
NBI structure number	000000000004328
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Pickard Avenue over Chippewa River	1979	16,211	Fair
M-20 over Chippewa River	1996	10,842	Good
US-127 NB over Little Salt River	1961	10,457	Fair
US-127 SB over Little Salt River	1961	10,457	Fair
Mission Road over Ann Arbor Railroad	2005	9,200	Good
Mission Road over North Br Chippewa River	2008	9,019	Good