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I0020 over Bayou Lafourche

Richland Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory

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

I0020 over Bayou Lafourche in Richland Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1968 and reconstructed in 1991, making it 57 years old at the 2025 inventory.
It carries about 38,890 vehicles a day (traffic count year 2021).
Its listed owner is the state highway agency.
It is one of 137 of the 204 inventoried bridges in Richland Parish rated fair (67.2%); 20 (9.8%) 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 541 ft
Location	4.0 Mi West of La 133
NBI structure number	054204510700271
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I0020 over Old B Lafourche	1968	38,890	Fair
I0020 over Diversion Canal	1968	38,890	Fair
I0020 over Bayou Crew	1968	38,890	Fair
I0020 over Drain	1968	38,890	Fair
I0020 over Boeuf River	1968	38,890	Fair
I0020 over Drain	1968	38,890	Fair