The Three Gorges Dam wonder came in Civ4 Warlords. Its nif model was really Hoover Dam. Hoover Dam nif has been used for the Dam of Marib wonder in ancient mods. Dam of Marib was an agricultural dam & canal system in Sabatean Kingdom (Yemen) from 900BC to 500AD. Here I have straightened the dam, replaced hydroelectrics with sluice gate & canal, as you see below.
