The Spruce Hill Works is located in the Paint Creek Valley between Bainbridge and Chillicothe , Ohio and was within visual distance from two other important Hopewell geometric earthwork sites – The Baum Earthworks and the Seip Mound Earthworks (from Squier and Davis ’
Ancient Monuments of the Mississippi Valley
, 1847):
Many of the Hopewellian earthwork constructions throughout Ohio have incorporated significant astronomical alignments, but it is unclear whether the Spruce Hill Works has any such connections because no systematic archaeological excavations have ever been conducted at the site. However, over the years there have been several intriguing and potentially important discoveries that have been found at the Spruce Hill Works site which include evidence for ancient industrial activity with at least 30 metal-working ‘furnaces’ which was first reported on in 1811 by James Foster, editor of the
Scioto Gazette
(an early Chillicothe, Ohio newspaper),
Squier and Davis in 1847 reported seeing “strong traces of fire” and that many stone mounds along the wall exhibited marks of intense heat which vitrified the surfaces of the stones,
and more recently, tangible evidence for metal casting was discovered by John Cahoon in 1993 in the form of a vitrified clay mold located at the “isthmus”, or narrow SW entranceway into the Spruce Hill Works which may have been used to cast a +20 lbs. copper ‘celt’ found in excavations of the nearby Seip Mound earthworks. Limited ‘test’ excavations were conducted by archaeologists from the National Park Service in 1995-96 which found Hopewellian-culture related artifacts, vast quantities of burned, fused, or glazed sandstones and vitrified soils
,
and also confirmed that the stone walls were artificially constructed and not natural as some skeptics had asserted. This led the National Park Service to seek acquisition of the Spruce Hill Works site for preservation, to be included in the Hopewell Culture National Historic Park , centered at the Mound City Group in Chillicothe , Ohio . This year, the National Park Service notified Congress that the Spruce Hill Works site was the #2 priority in the United States for acquisition, and the National Park Service also included their intention for acquiring the Spruce Hill Works site in their United Nations World Heritage application submission.