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Nfa 1796 (sa 4304) over Duck River

Humphreys County, Tennessee · rated Fair in the 2025 National Bridge Inventory

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

Nfa 1796 (sa 4304) over Duck River in Humphreys County, Tennessee, 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 1976, making it 49 years old at the 2025 inventory.
It carries about 156 vehicles a day (traffic count year 2021).
Its listed owner is the county highway agency.
It is one of 169 of the 252 inventoried bridges in Humphreys County rated fair (67.1%); 9 (3.6%) 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 560 ft
Location	3 M. W. SR13.
NBI structure number	43017960001
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I40 over Branch	1965	35,730	Fair
I40 over Branch	1965	35,730	Fair
I40 over South Fork Blue Creek	1965	35,649	Fair
I40 over South Fork Blue Creek	1965	35,649	Fair
I40 over Branch	1964	35,368	Fair
I40 over Branch	1964	35,368	Fair