Including Jacka. Amalgamation: Cock. Worked With: Meadow. Wheal Prudence, an old copper mine situated on the cliffs south and southwest of Hanover Cove, resulted from the amalgamation of smaller, older mines such as Wheal Jacka, Wheal Cock, and Wheal Meadow, although their exact locations are now uncertain. Remnants of the 70-inch pumping engine house on New Engine Shaft’s base still exist, though the shaft itself is blocked at the surface. Unfortunately, the engine house was destroyed during the construction of the Second World War airfield on the site. Other shafts can be observed near the cliff edge and on the coastal slope. The mine is associated with two main lodes: the North (or Prudence) Lode and the South (or New) Lode, with references also made to Wheal Cock Lode and Caunter Copper Lode.

Historical records indicate that between 1821 and 1865, Wheal Prudence produced around 7,000 tons of copper ore. Additionally, 55 tons of black tin were extracted in 1825-1826, with a further 1 ton of tin produced in 1847-1849.

1800s -1816 1821-1849 1862-1874

As of 2024, New Engine Shaft is capped with a Clwyd cap, and connects with Deep adit portal; open to the cliff. Accessible only by rope.