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Bridge conditions in Houghton County, Michigan

59 inventoried bridges · 2 rated poor · 2025 National Bridge Inventory

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

Houghton County tracks close to typical: 2 of its 59 inventoried bridges (3.4%) are rated poor, against a national rate of about 7%.

2 of the 59 bridges in Houghton County, Michigan, are rated in poor condition (3.4%) in the 2025 National Bridge Inventory, as of August 20, 2026.
38 bridges (64.4%) are rated good and 19 (32.2%) fair.
The median Houghton County bridge was built in 1985.
The busiest poor-rated bridge is Wood Bush Road over Traprock River (built 1900), carrying about 80 vehicles a day.

Good 64.4% · Fair 32.2% · Poor 3.4% of 59 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
Wood Bush Road over Traprock River	1900	80	Poor
Hazel Swamp Road over W Br Otter River	1997	10	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Us-41&m-26 Rr(abn) over Portage Lake & EB M-26	1960	24,754	Fair
US-41 over Pilgrim River	1916	5,543	Fair
M-26 over Quincy Creek	2021	5,200	Good
US-41 over Sturgeon River Slough	1956	3,985	Fair
US-41 over Snake River	1934	3,883	Fair
US-41 over Backwater Portage River	1929	3,883	Fair
US-41 over Sturgeon River	1960	3,883	Fair
US-41 over Pike River	1954	3,883	Fair
Canal Rd over Coles Creek	2018	2,988	Good
M-203 over Swede Town Creek	2018	2,984	Good

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of Michigan: Michigan bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.