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30TH Rd (rs 1231) over N. Fk. Black Vermillion

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

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

30TH Rd (rs 1231) over N. Fk. Black Vermillion in Marshall County, Kansas, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1949, making it 76 years old at the 2025 inventory.
It carries about 242 vehicles a day (traffic count year 2007).
Its listed owner is the county highway agency.
It is one of 159 of the 403 inventoried bridges in Marshall County rated fair (39.5%); 42 (10.4%) 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 124 ft
Location	1.0N of Axtell
NBI structure number	000000000580590
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
U36 Hwy over Bigblueriv&uprr&localrd	2004	5,184	Good
US36 Hwy over Spring Creek Drainage	1957	3,333	Good
US-36 Hwy over Spring Creek	1993	3,333	Good
US36 Hwy over N F Blk Vermillion R Drn	1958	3,045	Good
US 36 Hwy over Robidoux Creek	1990	2,986	Good
US36 Hwy over N F Blk Vermillion R Drn	1958	2,608	Fair