Home › North Dakota › Hettinger County › Nd Highway 21 over Thirty Mile Creek

Nd Highway 21 over Thirty Mile Creek

Hettinger County, North Dakota · rated Fair in the 2025 National Bridge Inventory

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

Nd Highway 21 over Thirty Mile Creek in Hettinger County, North Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1960, making it 65 years old at the 2025 inventory.
It carries about 400 vehicles a day (traffic count year 2019).
Its listed owner is the state highway agency.
It is one of 34 of the 64 inventoried bridges in Hettinger County rated fair (53.1%); 9 (14.1%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 154 ft
Location	4 East of Burt
NBI structure number	0021064818
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Nd Highway 22 over Creek	1960	1,100	Fair
Nd Highway 22 over Cannonball River	1960	830	Fair
W 1st St over N Fork Cannonball River	1982	700	Fair
Nd Highway 8 over Cannonball River	1979	670	Good
Nd Highway 22 over Chanta Peta Creek	1985	600	Fair
12th St over Creek	1958	550	Fair