Gentlemen: My purpose here is not to support the removal, or RIP of the #169 pilot, but to give you a web site, for those interested, on ground penetrating radar. I Have talked with Larry Conyers, at Denver University, and I am considering using this...if I can get a grant,...for the exploration of the Saxonia site, on the old South Park, in Estabrook Canyon. It is not cheap, but highly effective. Larry site location is www.DU.edu/~lconyer/. I think you will find this site very informative, and one to trigger the imagination. "Bo"