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Heron St over Unnamed Br

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

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

Heron St over Unnamed Br in Macon County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1989 and reconstructed in 1998, making it 36 years old at the 2025 inventory.
It carries about 15 vehicles a day (traffic count year 2024).
Its listed owner is the county highway agency.
It is one of 144 of the 291 inventoried bridges in Macon County rated fair (49.5%); 20 (6.9%) 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	Steel stringer or multi-beam girder
Length	about 35 ft
Location	S 9 T 56 N R 15 W
NBI structure number	24175
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 63 S over US 36	1971	12,582	Poor
US 63 S over BNSF RR	1985	11,335	Fair
US 36 E over Duck CR	1924	11,214	Fair
US 36 E over E Fk Chariton Rvr	1984	10,917	Fair
US 36 E over Winn CR	1925	10,888	Fair
US 36 W over Puzzle CR	1924	9,809	Fair