Due to the ice cover, and a spate of unseasonably warm weather that makes the ice too dangerous to work on, only about 1200 gallons of an estimated 39,000 to 50,000 gallons have been recovered from the river so far. About 100 emergency workers responded to the January 17 spill, which came from the Poplar Pipeline operated by Bridger Pipeline LLC, which is owned by True Companies of Casper, Wyoming. The ruptured pipe, built in 1967, was 12 inches in diameter and carried about 42,000 gallons of crude per day from the Bakken oilfields to Baker, Montana. It was supposed to be buried eight feet below the bottom of the river, although a 120-foot section of the pipe was found to be exposed. A 2011 inspection showed the pipe was even then "at moderate risk for failure" and was buried in an area along the south bank of the river that was rapidly eroding and at risk from ice scouring.