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Mo 79 N over Belleau CR

St. Charles County, Missouri · rated Fair in the 2025 National Bridge Inventory

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

Mo 79 N over Belleau CR in St. Charles 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 1990, making it 35 years old at the 2025 inventory.
It carries about 8,679 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 269 of the 419 inventoried bridges in St. Charles County rated fair (64.2%); 12 (2.9%) 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 prestressed concrete stringer or multi-beam girder
Length	about 124 ft
Location	S 23 T 47 N R 3 E
NBI structure number	3864
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Is 70 E over Sandford CR	1953	122,262	Fair
Is 70 E over Cole CR	1953	109,398	Fair
Is 70 E over Belleau CR	1955	108,528	Fair
Is 70 E over Rt K Co OR70W to OR70E	1955	107,979	Fair
Is 70 E over Gilmore Br	1950	87,827	Fair
Is 70 W over Cst S 5TH St	1977	84,031	Fair