TOPEKA, Kan. (AP) — Time is running out to begin construction on a new coal-fired power plant in Kansas before its permit lapses.

The battle over the plant has lasted more than a decade and by the time the Kansas Supreme Court cleared the way for construction in 2017, a company involved in it called the chances it would be built "remote." But The Kansas City Star and Wichita Eagle report that documents they obtained show the utility spearheading the project told regulators that "significant interest" remains in building the plant.

Sunflower Electric Power Corp. asked for an 18-month extension...