Elizabeth Twp in Allegheny Co. OKs Invenergy Gas-Fired Plant January 2, 2019 Allegheny County, Electrical Generation, Industrywide Issues, Pennsylvania, Regulation In January 2016, Invenergy announced their intention to build a natgas-powered electric plant in Elizabeth Township, in Allegheny County (see Invenergy Eyes SWPA for Second Marcellus-Powered Electric Plant). Please Login to view this content. (Not a member? Join Today!) Related Post navigation Outrage: More Russian NatGas Heads to Boston…and Cove Point!Tenaska’s Westmoreland, PA Gas-Fired Plant Goes Online You do not have permission to view the comments. Click here to cancel reply. Please Login to post a comment Notify me of follow-up comments by email.