Environmental groups say Interstate Power & Light’s proposed rate increase would punish solar and efficiency.
Investor-owned utilities will need to disclose when they operate power plants despite low wholesale market prices.
A Missouri landowners group says the transmission line developers don’t meet the definition of a public utility.
Westar says buying the remaining share of the plant was the cheapest way to resolve a dispute with its former owner.
Interstate Power and Light could also boost its profits by investing in wind, says a study commissioned by clean energy nonprofits.