Exxon Mobil has asked federal regulators to reconsider a $1 million penalty imposed against the oil giant over a 63,000-gallon crude spill into Montana's Yellowstone River.
Scotts Bluff County's commissioners don't like the location of a proposed disposal well for fracking water in nearby Sioux County and have appealed for help from a state regulatory board.
Montana's governor is calling on the Obama administration to strengthen rules that require oil pipelines to be buried just 4 feet beneath major waterways.
The Republican-controlled Congress has cleared a bill approving the construction of the Keystone XL oil pipeline. That sets up a confrontation with President Barack Obama, who has threatened to veto the measure.
Records released by state health officials show high contamination levels persist along a North Dakota creek more than a month after a massive wastewater spill in the state's oil patch.
Senator Steve Daines joined the Senate Energy and Natural Resources Committee today to approve construction of Keystone XL pipeline, clearing the way for full Senate vote.