Sukkur Barrage is a barrage on the River Indus near the city of Sukkur in the Sindh province of Pakistan. The barrage was built during the British Raj from 1923 to 1932 and was named Lloyd Barrage. It is considered to be the largest single irrigation network of its kind in the world. It irrigates from Sukkur district in the north, to Mirpurkhas/Tharparkar and Hyderabad districts in the south of Sindh, almost all parts of the province. It is situated about 500 kilometres northeast of Karachi, 5 kilometres below the railway bridge, or the Sukkur Gorge. The introduction of barrage-controlled irrigation system resulted in more timely water supplies for the existing cultivated areas of Sindh province of Pakistan.