www.RockinWalls.com • Historic Preservation Training Center HPTC Project 2016 @ Hopewell Furnace National Historic Site PA. Rebuild of east headrace sections 3' +/- H dry laid stone retaining wall most likely built in 1771 to supply the water to the water wheel to run the furnace. The wall was then rebuilt in 1939 by the CCC (Civilian Conservation Corps) and then again in 1984 NPS Williamsport Preservation Training Center of Williamsport, MD. Documentation of the project can be found in the park’s central file H3015, and in the archives
accessioned as HOFU- 936. Black- and- white photographs documenting the deteriorated condition of the wall in 1983, and its reconstruction in 1984.

Hopewell Furnace National Historic Site in southeastern Berks County, near Elverson, Pennsylvania, is an example of an American 19th century rural "iron plantation"....Wikipedia

https://www.nps.gov/hofu/index.htm

https://www.nps.gov/parkhistory/onlin...