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County Highway 27 over Knife River

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

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

County Highway 27 over Knife River in Mercer 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 5 (fair condition) on the 0-9 scale.
It was built in 1979, making it 46 years old at the 2025 inventory.
It carries about 270 vehicles a day (traffic count year 2018).
Its listed owner is the county highway agency.
It is one of 43 of the 71 inventoried bridges in Mercer County rated fair (60.6%); 4 (5.6%) 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	Continuous prestressed concrete single box beam
Length	about 161 ft
Location	1 South of Hazen
NBI structure number	000000029128190
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 49 over Creek	1967	3,730	Fair
Nd Highway 49 over Knife River	2016	3,400	Good
Nd Highway 49 over Coyote Creek	2016	2,745	Good
Nd Highway 49 over Brush Creek	2016	2,745	Good
Nd Highway 200 over Knife River Overflow	1952	2,300	Fair
Nd Highway 200 over Knife River	1966	2,280	Fair