The Southern Reservoir existed on the world of Darkknell as a significant water storage facility during the era known as the Republic Dark Age. This reservoir was to be found in the capital city of Xakrea, specifically in proximity to the Sanctum Celestial fortress belonging to the Sith Lord Daiman. In 1032 BBY, during the Battle of Darkknell, the artificial rain and subsequent flooding caused by Zodoh, a Hutt crime lord utilizing his Stormdrivers, led to the reservoir's failure and subsequent inundation of Daiman's palace.