C.V.V. Powers

Shaft no 25, and blowoff drift

C.V.V. Powers (mentioned on object), c. 1883 - in or before 1887

Headhouse shaft No. 25

C.V.V. Powers (mentioned on object), c. 1883 - in or before 1887

Ingersoll drill Co's compressor plant

C.V.V. Powers (mentioned on object), c. 1883 - in or before 1887