Bridge conditions in Logan County, North Dakota

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

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

About one in 6 bridges in Logan County is rated in poor condition: 2 of 13 on the federal inventory, one of the higher shares in North Dakota.

2 of the 13 bridges in Logan County, North Dakota, are rated in poor condition (15.4%) in the 2025 National Bridge Inventory, as of August 20, 2026.
9 bridges (69.2%) are rated good and 2 (15.4%) fair.
The median Logan County bridge was built in 1983.
The busiest poor-rated bridge is 77th St SE over Creek (built 1939), carrying about 24 vehicles a day.

Good 69.2% · Fair 15.4% · Poor 15.4% of 13 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
77th St SE over Creek	1939	24	Poor
30TH Ave SE over Beaver Creek	1940	5	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Nd Highway 3 over Mckenna Coulee	1983	700	Good
Nd Highway 3 over Beaver Creek	2024	540	Good
71ST St SE over Beaver Creek	1961	115	Good
37TH Ave SE over Creek	1948	50	Fair
71ST St SE over Beaver Creek	1983	48	Good
71ST St SE over Beaver Creek	2018	48	Good
71ST St SE over Beaver Creek	1980	48	Good
26TH Ave SE over Beaver Creek	1996	40	Good
76TH St SE over Beaver Creek	1984	25	Good
72ND St SE over Beaver Creek	1988	24	Good

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

All of North Dakota: North Dakota 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.