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61ST Ave SW over Cannonball River

Grant County, North Dakota · rated Good in the 2025 National Bridge Inventory

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

61ST Ave SW over Cannonball River in Grant County, North Dakota, 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 1983, making it 42 years old at the 2025 inventory.
It carries about 24 vehicles a day (traffic count year 2018).
Its listed owner is the county highway agency.
It is one of 23 of the 59 inventoried bridges in Grant County rated good (39.0%); 6 (10.2%) 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	Continuous prestressed concrete single box beam
Length	about 193 ft
Location	6 South of Leith
NBI structure number	000000019121330
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Nd Highway over Creek	1950	950	Fair
Nd Highway over Branch-antelope Creek	1952	700	Fair
Nd Highway 21 over Creek	1994	590	Fair
Nd Highway 49 over Antelope Creek	1988	580	Good
Nd Highway 31 over Dogtooth Creek	2024	420	Good
Nd Highway 49 over Cannonball River	1970	420	Fair