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Mcgregor Road over Portage Lake Outlet

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

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

Mcgregor Road over Portage Lake Outlet in Washtenaw 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 8 (very good condition) on the 0-9 scale.
It was built in 2016, making it 9 years old at the 2025 inventory.
It carries about 4,932 vehicles a day (traffic count year 2016).
Its listed owner is the county highway agency.
It is one of 64 of the 262 inventoried bridges in Washtenaw County rated good (24.4%); 47 (17.9%) 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 49 ft
Location	Dexter Twp Section 1
NBI structure number	000000000010995
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-94 over Huron River	1971	102,776	Fair
I-94 over Aa RR	1954	78,348	Fair
I-94 over Honey Creek	2000	77,206	Fair
US-23 over Horseshoe Lake Drain	1956	66,750	Fair
Gotfredson Road over M-14	1975	65,500	Fair
M-14 & US-23 Br over Mdot RR Cor & Huron Rvr	1956	59,888	Fair