Alexandria - Liberation Square Midan el-Tahrir

To the west of the dam is a navigation canal 1.25mi/ 2km long which enables boats of some size to move up and downstream, overcoming the difference in level (75ft/23m) by the use of four locks 230ft/70m long and 31ft/9.5m wide. The two uppermost lockgates are 62ft/19m high, the other five 49ft/15m, 39ft/12m and 36ft/11m.