Tenaska’s Westmoreland, PA Gas-Fired Plant Goes Online January 2, 2019 Electrical Generation, Industrywide Issues, Pennsylvania, Westmoreland County Tenaska Westmoreland Generating Station, a new natural gas-fueled power plant in southwest Pennsylvania, is now online. Please Login to view this content. (Not a member? Join Today!) Related Post navigation Elizabeth Twp in Allegheny Co. OKs Invenergy Gas-Fired PlantNEPA Gas-Fired Plant Gets Noisy, Scares the Neighbors 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.