The sand sits in a tray-shaped pan with a lid that can be taken off at any point, but most of the it gets offloaded into silos near the Texas and New Mexico border. Along its miles-long journey ...

Vehicles drive under a section of a 67km-long conveyor belt carrying sand near Kermit, Texas, on Feb. 26. Photo: AP When moving sand by truck became a nuisance, an unprecedented and risky investment ...