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Mo 129 S over S Blackbird CR

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

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

Mo 129 S over S Blackbird CR in Putnam County, Missouri, 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 1965, making it 60 years old at the 2025 inventory.
It carries about 125 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 73 of the 214 inventoried bridges in Putnam County rated fair (34.1%); 32 (15.0%) 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 steel stringer or multi-beam girder
Length	about 167 ft
Location	S 27 T 65 N R 18 W
NBI structure number	8456
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Mo 5 S over Blackbird CR	2010	1,494	Good
US 136 W over E Locust CR	2010	1,492	Good
US 136 E over Tanyard Br	1931	1,492	Fair
US 136 E over Barber CR	2002	1,247	Fair
US 136 E over Old Chariton Rvr	2008	1,183	Fair
US 136 E over Shoal CR	1966	1,146	Good