Rocks rose around them, then a concrete shaft.

We went down in a concrete shaft that contained a series of elevators.

The sump hole, a concrete shaft about four feet wide, was more than 30 feet deep.

The steel and concrete shaft stop short of the coalbed and do not go through it as is the case with the older method.

A Condeep usually consists of a base of concrete oil storage tanks from which one, three or four concrete shafts rise.

The massive elevator rumbled up the greasy concrete shaft.

She crawled up through a narrow concrete shaft, and pushed open a wooden trapdoor at the top.

The loft is supported by a central concrete shaft, at its apex joists radiate outward from it.

The monument is like a small concrete shaft, surmounted by a carved eagle of stone.

Heat and cordite smoke billowed through the opening, up into the concrete shaft.