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Mo 64 E over Niangua Rvr

Dallas County, Missouri · rated Poor in the 2025 National Bridge Inventory

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

Mo 64 E over Niangua Rvr in Dallas County, Missouri, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 3 (serious condition) on the 0-9 scale.
It was built in 1931, making it 94 years old at the 2025 inventory.
It carries about 976 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 11 of the 114 inventoried bridges in Dallas County rated poor (9.6%); 11 (9.6%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Continuous concrete deck arch
Length	about 466 ft
Location	S 25 T 35 N R 18 W
NBI structure number	5520
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 65 S over Wilson CR	1992	9,071	Fair
US 65 S over Buffalo CR	1992	7,502	Fair
US 65 S over Hankens CR	1992	7,502	Fair
US 65 S over Br of Lindley CR	1928	5,307	Fair
US 65 S over Lindley CR	1928	5,290	Fair
US 65 S over Br of Lindley CR	1928	5,290	Fair