Exhibit 21.1 SUBSIDIARIES OF MIRANT AMERICAS GENERATION, LLC Mirant State Line Ventures, Inc. .............................................................. Delaware State Line Holding Corp. .................................................................... Delaware State Line Holding II, LLC .................................................................. Delaware State Line Energy, L.L.C. ................................................................. Indiana (60% - State Line Holding II, LLC; 40% - State Line Holding Corporation) Mirant New York, Inc. ......................................................................... Delaware Mirant New York Investments, Inc. ............................................................. Delaware Mirant Bowline, LLC ......................................................................... Delaware (99% - Mirant New York Investments, Inc.; 1% - Mirant New York, Inc.) Mirant Lovett, LLC .......................................................................... Delaware (99% - Mirant New York Investments, Inc.; 1% - Mirant New York, Inc.) Mirant NY-Gen, LLC .......................................................................... Delaware (99% - Mirant New York Investments, Inc.; 1% - Mirant New York, Inc.) Hudson Valley Gas Corporation ............................................................... New York Mirant California Investments, Inc. ........................................................... Delaware Mirant California, LLC ...................................................................... Delaware Mirant Delta, LLC ......................................................................... Delaware Mirant Potrero, LLC ....................................................................... Delaware Mirant Bay Area Procurement, LLC .......................................................... Delaware Mirant Risk Management Investments, Inc. ...................................................... Delaware Mirant PJM Marketing, LLC ................................................................... Delaware Mirant New England, LLC ..................................................................... Delaware Mirant New England, Inc. ...................................................................... Delaware Mirant Canal, LLC .......................................................................... Delaware Mirant Canal II, LLC ....................................................................... Delaware Mirant Kendall, LLC ........................................................................ Delaware Mirant Wisconsin Investments, Inc. ............................................................ Delaware Mirant Neenah, LLC .......................................................................... Delaware Mirant Texas Management, Inc. ................................................................. Delaware Mirant Texas Investments, Inc. ................................................................ Delaware Mirant Central Texas, LP .................................................................... Delaware (99% - Mirant Texas Investments, Inc.; 1% - Mirant Texas Management, Inc.) Mirant Texas, LP ............................................................................ Delaware (99% - Mirant Texas Investments, Inc.; 1% - Mirant Texas Management, Inc.) Mirant Parker, LLC .......................................................................... Delaware (99% - Mirant Texas Investments, Inc.; 1% - Mirant Texas Management, Inc.) Mirant Mid-Atlantic Investments, LLC .......................................................... Delaware Mirant Mid-Atlantic Management, Inc. .......................................................... Delaware Mirant Mid-Atlantic, LLC .................................................................... Delaware (99% - Mirant Mid-Atlantic Investments, LLC; 1% - Mirant Mid-Atlantic Management, Inc.) Mirant Chalk Point, LLC ................................................................... Delaware Mirant D.C. O&M, LLC ...................................................................... Delaware Mirant Piney Point, LLC ................................................................... Delaware Mirant MD Ash Management, LLC ............................................................. Delaware