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Key Rd over Trib to N Spring C

Sullivan County, Missouri · rated Fair in the 2025 National Bridge Inventory

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

Key Rd over Trib to N Spring C in Sullivan County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1999, making it 26 years old at the 2025 inventory.
It carries about 10 vehicles a day (traffic count year 2024).
Its listed owner is the county highway agency.
It is one of 81 of the 221 inventoried bridges in Sullivan County rated fair (36.7%); 16 (7.2%) 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	Steel stringer or multi-beam girder
Length	about 23 ft
Location	S 20 T 64 N R 18 W
NBI structure number	28345
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Mo 6 E over E Locust CR	1996	2,425	Good
Mo 6 E over W Yellow CR	2008	2,153	Good
Mo 6 E over Br West Yellow CR	2019	2,153	Good
Rt E E over Montgomery Br	1969	1,700	Fair
Rt E E over Locust CR	1969	1,700	Fair
Mo 6 E over Mussel Fk CR	1932	1,512	Fair