We add our congrats too, Rob and Team CHUMP....looks like we just missed you guys at Acker Park? We were there about 1500 hrs. We think that the area with all the vents, etc might be a buried water tank. (?) There are water tanks on hilltops all around Prescott, it is one thing that might make sense.... Trisha "LIghtning" Prescott ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Although no one can go back and make a brand new start, Anyone can start from now and make a brand new ending." ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~