While regulated on the federal level, there is still much that can be done on a state level, including adding per-barrel fees to pay for cleanup plans. Plus, a new regulation took effect requiring railroads to notify states about Bakken crude trains.
Jun 10, 2014 Los Angeles Times
It's on the scale of a Deepwater Horizon spill every 2 months - except that it's considered the cost of doing business. Aging pipes, lax oversight and inclement weather all combine to make an estimated 5 million tons of annual spillage.
Dec 20, 2011 AP via Yahoo Finance