|Capacity||72 per cycle|
Hannibarrels opened with the park and operated through the late 1990s. It was renamed Powder Keg in one of its last seasons.
- "The End Of The Hannibarrels". Negative-G. 2013-09-21. Retrieved 2023-10-29.
- "The construction process of Tsunami Soaker has officially begun! Demolition of the old Hannibarrels ride began today, goodbye old friend!". Facebook. Six Flags St. Louis. 2013-12-04. Retrieved 2023-10-29.