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SR 407 over Big Black River

Montgomery County, Mississippi · rated Fair in the 2025 National Bridge Inventory

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

SR 407 over Big Black River in Montgomery County, Mississippi, 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 1991, making it 34 years old at the 2025 inventory.
It carries about 480 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 44 of the 170 inventoried bridges in Montgomery County rated fair (25.9%); 2 (1.2%) 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	Prestressed concrete stringer or multi-beam girder
Length	about 474 ft
Location	11.2 Mi N Choctaw Cl
NBI structure number	310040704902940
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I 55 over Gum Branch Road	1965	7,500	Fair
I 55 over Gum Branch Road	1965	7,500	Fair
I 55 over Caney Creek	1965	7,500	Good
I 55 over Caney Creek	1965	7,500	Good
I 55 over Bluff Springs Road	1965	7,500	Fair
I 55 over Bluff Springs Road	1965	7,500	Fair