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LA0603 over Roundaway Bayou

Madison Parish, Louisiana · rated Poor in the 2025 National Bridge Inventory

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

LA0603 over Roundaway Bayou in Madison Parish, Louisiana, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1955, making it 70 years old at the 2025 inventory.
It carries about 100 vehicles a day (traffic count year 2021).
Its listed owner is the state highway agency.
It is one of 7 of the 104 inventoried bridges in Madison Parish rated poor (6.7%); 7 (6.7%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Timber stringer or multi-beam girder
Length	about 134 ft
Location	5.18 Mi East of South Int
NBI structure number	053303520105181
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
I0020 over Mississippi River	1973	36,023	Fair
I0020 over Bayou Macon	1971	31,481	Fair
I0020 over Bayou Macon	1971	31,481	Fair
I0020 over Drainage	1971	31,481	Fair
I0020 over Drainage	1971	31,481	Fair
I0020 over Joes Bayou Lake	1971	31,481	Fair