ernst-august-stollen

Updated: January 3, 2026

The adit which drains the mines of Gwennap in Cornwall, with its branches, is thirty miles long. Those of the silver mines of Saxony are scarcely less extensive, and the Ernst-August-Stollen, or great drain of the mines of the Harz, is fifteen miles long.

George P. Marsh - The Earth as Modified by Human Action