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9th St SW over Spring Creek

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

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

9th St SW over Spring Creek in Mercer 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 1988, making it 37 years old at the 2025 inventory.
It carries about 25 vehicles a day (traffic count year 2018).
Its listed owner is the county highway agency.
It is one of 24 of the 71 inventoried bridges in Mercer County rated good (33.8%); 4 (5.6%) 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	Continuous prestressed concrete single box beam
Length	about 119 ft
Location	1 West of Golden Valley
NBI structure number	000000029106190
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 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