The company, founded in 1999, has a significant presence in the Marcellus Shale region of Pennsylvania, where it operates approximately 900 wells producing clean natural gas. Alta Resources is also involved in the exploration and development of shale oil and gas assets in the Fayetteville Shale in Arkansas and the liquids-rich Duvernay Shale play in the Kaybob area of Alberta, Canada. The late George P. Mitchell, a pioneer in developing shale gas, was a longtime partner of Alta Resources.