🇾🇪 Yemen · Hydraulic works
South Sluice Hydraulic Extension - Marib Oasis
Sabaean c.750 BCE–575 CE; sluice extension · Sabaean (South Arabian)
Marib South Sluice (Masaq) – Sabaean Great Dam's mass southern sluice/spillway assembly (14m high, 600m dam length, 30,000 ha irrigation).