Dive Summary:

• The Sierra Club, an environmental organization, filed a notice of intent to sue Colorado Springs Utilities (CSU) on the grounds that the utility made “major modifications” to two coal-fired power plants without the necessary permits.
• The Sierra Club also claims that the utility, which is owned by the city of Colorado Springs, made the unpermitted changes without properly considering the amount of pollution they were creating.
• CSU spokesman Dave Grossman said that the utility “has been diligent to evaluate all projects” and feels “the plants are in compliance with all regulations.”

From the article:

Colorado Springs Utilities has violated federal law for the past 24 years by making "major modifications" to the Martin Drake and Ray Nixon coal-fired power plants without the necessary permits, the Sierra Club alleges in a filing.

The environmental organization on Monday filed a notice of intent to sue Utilities, claiming that in addition to the unpermitted changes, the city-owned utility did so "without complying with limits on the amount of pollution these power plants emit." ...