Oklahoma Gas and Electric went before the Oklahoma Corporation Commission again this week to try to get approval for environmental upgrades at its coal-fired power plant in Red Rock, Okla.

The U.S. Supreme Court put a stay on the plan and a federal appeals court will hear arguments in the case later this year.

Lawsuits against the U.S. Environmental Protection Agency keep rolling out of Oklahoma Attorney General Scott Pruitt’s office.

A press release from Pruitt’s office says representatives from Oklahoma were at the U.S. Court of Appeals in Washington, D.C. first thing Friday morning to ask the federal court to review the Clean Power Plan.

While environmental groups are disappointed in the ruling, they remain confident that, in the end, the Clean Water Rule will go forward.