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65th Ave SW over Spring Creek

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

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

65th Ave SW over Spring Creek in Mercer County, North Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
It was built in 1969, making it 56 years old at the 2025 inventory.
It carries about 26 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 4 of the 71 inventoried bridges in Mercer County rated poor (5.6%); 4 (5.6%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 60 ft
Location	2 East of Zap
NBI structure number	000000029116200
Condition class	Poor

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