R.P. Farnsworth & Co.

of New Orleans, Louisiana
Belle Chasse Tunnel (Plaquemines Parish, Louisiana)
Contractor, 1956
Tunnel under the Intracoastal Waterway on Southbound LA 23
Open to traffic

Harvey Tunnel (Jefferson Parish, Louisiana)
Contractor, 1957
Tunnel underneath Harvey Canal on Old Business US 90 in New Orleans
Open to four lanes of traffic with pedestrian access