Union Carbide St. Charles Operations (Taft/Hahnville)
Large load · 355 LA HWY 3142 (GATE 1), Taft, LA
St. Charles Operations at Taft and Hahnville, Louisiana, is a 2,000-acre petrochemical complex owned by Union Carbide Corporation, a Dow subsidiary, producing olefins, ethylene oxide, amines and acrylics. Electricity and steam are generated on site, and a FERC generator table lists four units of 125.8 MW, 125.8 MW, 22 MW and 50 MW nameplate capacity.
Overview
The complex consists of a 2,000-acre petrochemical manufacturing complex in Hahnville, just upriver from New Orleans. St. Charles Operations is owned by Union Carbide Corporation, a subsidiary of The Dow Chemical Company, and began operations in 1966. The olefins plant has two process units that produce 1,3-butadiene, ethylene, acetylene and propylene from ethane and propane cracking. The oxides plant produces ethylene oxide, the amines plant produces ethylene amines and ethanol amines, and the acrylics plant produces acrylic acid, acrolein, heavy esters, 2-ethylhexyl acrylate and methyl acrylate.
Profile
- Electricity and grid
- Electricity and steam are generated on site. A FERC generator table lists Dow Chemical Co - St Charles generators CGN1 and CGN2 at 125.8 MW each, STG at 22 MW and CSTG at 50 MW nameplate. Backup and stand-by power, if needed, will be provided by Entergy under the framework described in a filing before the Louisiana Public Service Commission.
- Ownership and agreements
- Macquarie Infrastructure Partners VI exercised an option to acquire an additional 9% equity stake in select U.S. Gulf Coast infrastructure assets of Dow, bringing its total stake in Diamond Infrastructure Solutions to 49%. Air Liquide continues to supply oxygen and nitrogen to Dow's St. Charles Operations site in Taft, Louisiana, under a long-term renewal contract. The Louisiana Public Service Commission dismissed jurisdictional petition U-37705 on April 22, 2026.
Facility
- Activity
- Olefins (butadiene, ethylene, acetylene, propylene), ethylene oxide, amines and acrylics
- Industry
- Industrial
- Site type
- Facility
- Operating status
- Operating
Permits and agreements
- Agreement
- Air Liquide long-term renewal contract to supply oxygen and nitrogen