Brigham Exploration Company engages in the exploration, development, and production of onshore oil and natural gas reserves in the Rocky Mountains, the Gulf Coast, the Anadarko Basin, and west Texas. It holds property interests in the Powder River Basin located in Wyoming; Onshore Gulf Coast consisting of the Vicksburg trend in Brooks County, Texas; Miocene and Upper Oligocene trends in Southern Louisiana; and the Frio trend in and around Matagorda County, Texas. As of December 31, 2009, the company had estimated proved reserves of 27.7 MMBoe. It had approximately 282,584 net leasehold acres in the Williston Basin. The company sells its oil and natural gas to intrastate pipeline purchasers, operators of processing plants, and marketing companies. Brigham Exploration Company was founded in 1990 and is based in Austin, Texas.