Sam, back in the 90's a big flood scoured away the earthen bank that the main source water flowed in a channel in the dirt over to the Womb and Serenity Hot Pools. Then the main source water just ran down the hill into the creek and was not going to the main pools. There was no Anniversary Pool at that time. Then AZ Mike constructed the rock and cement channel to get the hot water to once again flow to the hot pools. Some years later the Anniversary Pool was built. So yes, the hot source water for the Womb was flowing in the dike on the wall first.