Woops! The ongoing circle renovation took an unexpected turn this afternoon when an estimated three-story tall geyser of water came shooting out of the ground. Could this have been a planned release of water? Possibly - although the third picture might negate that theory.
Thanks to D.L. for the great pictures!
Also: the early word is that the geyser will have absolutely no effect upon the replacement trees that will be planted around the circle, which I hear will be beautiful!