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US56 K15 Hwy over S. Cottonwood River Drg.

Marion County, Kansas · rated Good in the 2025 National Bridge Inventory

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

US56 K15 Hwy over S. Cottonwood River Drg. in Marion County, Kansas, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
It was built in 1949 and reconstructed in 1970, making it 76 years old at the 2025 inventory.
It carries about 3,882 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 125 of the 323 inventoried bridges in Marion County rated good (38.7%); 35 (10.8%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	7	Good condition

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

Bridge	Built	Vehicles/day	Condition
US-50 Hwy over Spring Creek	1994	5,402	Good
US-50 Hwy over Doyle Creek Drainage	1994	5,097	Good
US-50 Hwy over Doyle Creek Drainage	1998	5,097	Good
US-50 Hwy over Doyle Creek Drainage	1998	5,097	Good
US-50 Hwy over Doyle Creek Drainage	1998	5,097	Good
US-50 Hwy over Union Pacific RR.	1994	4,812	Good