She said May 15 will be her final day on the commission, which oversees electric, telecommunication and water and sewer utilities across Texas.
“You have left a distinguished and wonderful mark on this state with your service,” Commissioner Brandy Marty Marquez told Nelson on Thursday.
“I’m not dead yet,” Nelson joked.
Former Gov. Rick Perry first appointed Nelson to the commission after she served as his adviser on energy and other utility issues.
Over her tenure at the PUC, Texas saw the build-out of a $7 billion power line project to accommodate the state’s booming wind sector, and she at times questioned whether the wind energy sector was paying its fair share — she called for the end of federal wind tax credits, saying they distorted the power market.
More recently, she called for Texas to crack down on deceptive retail electric providers, and her commission has wrangled with giant power companies that have sought — thus far unsuccessfully — to buy Oncor, the state’s largest electric transmission utility.
A South Dakota native, Nelson grew interested in legal and regulatory issues early, after working in Washington in the late 1970s for one of her home state's senators, Larry Pressler, before a cousin in Houston persuaded her to move to Texas, where she attended law school at Texas Tech University.