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US-0421 over Martins Fk Cumberland R

Harlan County, Kentucky · rated Good in the 2025 National Bridge Inventory

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

US-0421 over Martins Fk Cumberland R in Harlan County, Kentucky, 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 2004, making it 21 years old at the 2025 inventory.
It carries about 2,750 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 68 of the 253 inventoried bridges in Harlan County rated good (26.9%); 39 (15.4%) 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 stringer or multi-beam girder
Length	about 563 ft
Location	7.7 Mi N of Va.state Line
NBI structure number	048B00186N
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US-421 over Clover Fk Cumberland Rvr	1976	15,138	Fair
US-421 over Clover Fork & L.&n. R.R.	1974	15,138	Fair
US-421 over CSX Rr-ky 480-clover Fk	1974	15,138	Fair
US-119 over Ky 413 & Poor Fk Cmbrl R	1966	7,584	Fair
Ky-160 over Looney Creek	1942	6,483	Fair
Industrial Park Rd over Martins Fork	1998	6,260	Good