Sentences with phrase «huge excavators»

At the mine, huge excavators called draglines clear loose earth from above black coal seams.

Not exact matches

Alberta's tar sand reserves are now estimated to contain more than 175 billion barrels of crude oil, but to get to the huge reserves, excavators must remove the topsoil and then take out the underlying tar sands by lifted them into dump trucks.

Whether large cranes are hoisting huge steel beams weighing many hundreds of tons, or an excavator is removing large amounts of dirt, rubble or other debris from a work site, there is always a good chance that heavy, possibly - dangerous materials are being hoisted high up in the air at a construction site.