🇪🇬 Egypt · Hydraulic works
Sadd el-Kafara North Embankment Wadi Garawi
Old Kingdom · 4th Dynasty Egypt (Sneferu to Khufu horizon)
North wing 55 m of world's oldest large dam (Old Kingdom) breached during construction.
🇺🇸 United States · Earthwork
Turner Earthworks
Middle Woodland (Hopewell) · Hopewell (Ohio Hopewell)
Hopewell earthworks (200 BCE–400 CE) on Little Miami — 300-m Great Enclosure and pipestone pipes at Cincinnati.