@Gene - thanks for catching my error buddy! (edited the original post)
And you would have to improve upon my design! While your design has just one relay, I was trying to KISS, by keeping everything similar and allowing for more than two zones.
To provide more detail for @rpw128 - zone 6 would power the side yard master valve when that zone is active as it is on the Normally Closed connection, no power to the side yard master valve when zone 6 or 7 is not running. When zone 7 fires, it would close the relay coil and power the master valve (zone 6 is NOT connected to the relay coil).