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36th Avenue SW over Square Butte Creek

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

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

36th Avenue SW over Square Butte Creek in Oliver 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 1982, making it 43 years old at the 2025 inventory.
It carries about 385 vehicles a day (traffic count year 2018).
Its listed owner is the county highway agency.
It is one of 11 of the 23 inventoried bridges in Oliver County rated good (47.8%); 1 (4.3%) 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	Prestressed concrete single box beam
Length	about 57 ft
Location	2 East 1 South of Center
NBI structure number	000000033124140
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 200 over Missouri River	1971	1,430	Fair
Nd Highway 200 over Creek	1970	1,140	Fair
Nd Highway 200 over Creek	1971	940	Poor
Nd Highway over Creek	1976	670	Good
Nd Highway over Square Butte Creek	1987	650	Good
Nd Highway over Br. Square Butte Creek	1948	560	Fair