🇾🇪 Yemen · Hydraulic works
Sadd al-Khanas Dam — Wadi Khanas Sabaean Retainer Dam
Sabaean (900–500 BCE) · Sabaean
Sabaean retainer dam (9.5 m high, 220 m crest) on Wadi Khanas tributary 18 km northeast of Marib Dam (1,120 m), with 2.8 km rock-cut feeder canal to Marib north sluice extension.