The following press release was published by the U.S. Department of the Interior, National Park Service on April 8. It is reproduced in full below.

When Hopewell Furnace was in blast, colliers made and transported charcoal from a wide area around Hopewell Furnace, often many miles away. Today, volunteers demonstrate the method of charcoal making.

Source: U.S. Department of the Interior, National Park Service