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Irrfb County Hiway over Antelope Creek

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

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

Irrfb County Hiway over Antelope Creek in McKenzie 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 1993, making it 32 years old at the 2025 inventory.
It carries about 115 vehicles a day (traffic count year 2018).
Its listed owner is the county highway agency.
It is one of 47 of the 136 inventoried bridges in McKenzie County rated fair (34.6%); 1 (0.7%) 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	Prestressed concrete multiple box beam
Length	about 58 ft
Location	4 South 10 East Charlson
NBI structure number	000000027165100
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US Highway 85 over Creek	2014	12,880	Fair
US Highway 85 over Creek	2014	12,880	Fair
US Highway 85 over Creek	2014	12,880	Fair
US Highway 85 over Creek	2014	12,880	Good
US Highway 85 over Drain	2016	10,545	Good
US Highway 85 over Wildlife Crossing	2017	10,545	Good