Is it posible there is underground valves? I looked all over my yard and can only find2 valves.???
Factor is, we weren't there, and nothing is recorded about it, rather then what you're quoting. As for evidence - the earth sure has shifted around rather a lot because the opening. If there was once a first-class flood, when the waters gushed up from the deep as in a nice catastophe, tossing things about into layers far and wide the earth, the evidence won't appear like what you are watching for. What are you looking to disprove or show by way of this question?
Yes, electric valves are set on the Mainline which is under pressure. Usually in a loop around the home with the valves set where the zone starts. Some are designed to have a short mainline with the valves set in a large box next to a vacuum breaker. All valves need wires that run from the clock. Sorbet can be found with a metal detector if you simply can't find them. You can also set them to go off manually time delayed a few minutes, enough to go listen to hear the valve opening.
