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Rt Nn E over Is 55

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

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

Rt Nn E over Is 55 in Perry County, Missouri, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1970 and reconstructed in 1984, making it 55 years old at the 2025 inventory.
It carries about 364 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 21 of the 122 inventoried bridges in Perry County rated poor (17.2%); 21 (17.2%) 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 steel stringer or multi-beam girder
Length	about 294 ft
Location	S 20 T 36 N R 10 E
NBI structure number	2122
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Is 55 S over Apple CR	1970	11,280	Good
Mo 51 S over Is 55	1970	10,761	Poor
Is 55 S over Saline CR	1970	9,523	Fair
Is 55 N over Saline CR	1970	9,485	Fair
Is 55 N over Tyler Br	1971	9,389	Fair
Is 55 S over Tyler Br	1971	9,274	Good