The Tiryns dam (13th c. B.C.Ε.)

The earthworks diverting a seasonal torrent near Tiryns to the Hagios Adrianos riverbed are still in use to this day, exactly as they were designed and executed by the Myceneans in the 13th c. B.C.E. in order
to protect the lower city of prehistoric Tiryns from flooding.
The diversion earth dam was approximately 100m long and 3.50-4.00m wide and was lined with large stone blocks forming a stepped retaining wall 8-10m high. An artificial canal 1.5 km long channeled the water to a nearby stream bed. Apart from the main torrent, the earthworks also collected water from several tributaries.