Wyoming’s largest electric utility, Rocky Mountain Power, wants to hike prices by nearly 22%, a request according to the company that’s primarily driven by volatile natural gas and coal markets. It’s the largest rate increase request the regulated-monopoly utility has made in more than a decade, and it would result in an additional $16.42 per month for the average household customer, according to the company. The proposed rate hike faces scrutiny from the Sierra Club Wyoming Chapter, Walmart, the Wyoming Office of Consumer Advocate and an industry group – all intervenors in RMP’s rate request. Though it hasn’t filed as an intervenor, AARP Wyoming requested the public hearing scheduled for today in Rock Springs. The hearing will also be live streamed.