was goingrds knew it to come up on san antonio and in 1618, 302 years ago, san antonio was established here. the first challenge they faced was getting water. the first thing the priests did was to build a church. the second thing they did was set up a water system. -- yous you have looked have rivers but you don't have green fertile areas. they drew from their experience in spain which actually came from the roman empire. a system of irrigation ditches drinkingalso furnished water. everybody use the same water. they didn't know about terms. they wondered how they had epidemics. san antonio was selected, in large part, because it had two major sources of water upstream. we have the headwaters of the san antonio river and the headwaters of the san pedro creek. from those places, the engineers very carefully -- because this land was flat -- they were able a system which came from those rivers and through channels and follow the line of gravity down through what became san antonio. -- it was not until the system was not in general use, but there are still to get at the spanish missions, w