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Mo 139 S over Parson CR

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

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

Mo 139 S over Parson CR in Linn County, Missouri, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1933, making it 92 years old at the 2025 inventory.
It carries about 203 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 56 of the 313 inventoried bridges in Linn County rated poor (17.9%); 56 (17.9%) 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	Steel stringer or multi-beam girder
Length	about 79 ft
Location	S 31 T 59 N R 21 W
NBI structure number	9100
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US 36 E over S Br of Muddy CR	1961	13,161	Fair
US 36 E over Lit Turkey CR	1961	12,912	Fair
US 36 E over Elk CR	1955	11,581	Fair
US 36 E over Van Dorsen CR	1924	9,524	Fair
US 36 E over Mussel Fk	1951	9,524	Fair
US 36 E over E Yellow CR	1955	9,427	Fair