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US79B S-4 Lm4.36 over Ouachita River Relief

Ouachita County, Arkansas · rated Fair in the 2025 National Bridge Inventory

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

US79B S-4 Lm4.36 over Ouachita River Relief in Ouachita County, Arkansas, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1929, making it 96 years old at the 2025 inventory.
It carries about 2,300 vehicles a day (traffic count year 2018).
Its listed owner is the state highway agency.
It is one of 93 of the 162 inventoried bridges in Ouachita County rated fair (57.4%); 17 (10.5%) 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

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

Bridge	Built	Vehicles/day	Condition
US79 S-4 Lm 9.99SB over Mizzell Creek	1964	39,104	Fair
SH7 SB S-3 Lm 1.34 over Union Pacific RR	1985	18,043	Fair
SH7 NB S-3 Lm 1.34 over UPRR	1985	18,043	Fair
US 79 over Ouachita River	1976	10,000	Fair
US 79 S-4 Lm 3.26 over Ouachita Relief	1972	10,000	Fair
US 79 S-4 Lm 4.43 over Woodard Lake	1973	10,000	Fair