The Bakken shale is roaring back to life, and Kevin Black sees the evidence almost every day as he looks out the window of his blue Ford F-150 pickup truck.
The president of Creedence Energy Services, which provides chemicals for oil wells, Black, 29, drives about two hours to Williston, North Dakota, at the heart of the oil-rich formation, most days. After a three-year slump in Bakken shale-oil production, he says the resurgence is unmistakable in the influx of new industrial vehicles on the road.