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Nighthawk Rd. over South Cottonwood River

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

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

Nighthawk Rd. over South Cottonwood River in Marion County, Kansas, 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 1953, making it 72 years old at the 2025 inventory.
It carries about 280 vehicles a day (traffic count year 2019).
Its listed owner is the county highway agency.
It is one of 163 of the 323 inventoried bridges in Marion County rated fair (50.5%); 35 (10.8%) 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	Continuous concrete tee beam
Length	about 170 ft
Location	1.1S 5.0W of Marion
NBI structure number	000000000570570
Condition class	Fair

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