+bvrballs Posted August 16, 2006 Share Posted August 16, 2006 OK, have a couple of new questions. Just spent a weekend at Grand Canyon and did a bunch of benchmarking. Here are my questions. First: The Grandview Fire Tower is a BM described in 1934. It has been reported as recovered on geocaching.com and has also been reported to NGS as recovered by a geocacher in 2005. Problem is, the tower now standing was built in 1936 (told to me by the fire watcher on duty and confirmed on a website discussing known towers in AZ). Even a nearby BM is reported as being 100 feet north of the new tower where the old tower once stood (1958). I know that this isn't really a problem because, since the station described, the old tower, no longer exsists, I should report both as destroyed. Just wanted your opinions. Second: While attempting recovery of a USGS disk described in 1902 with no additional recovery notes, I did locate a USGS disk right where the GPS said it should be. This was out at the end of a point. There are no additional listing in the area by NGS. The problem is that the BM is supposed to have a designation of BISSEL, but the only markings on the disk (besides USGS, elev, etc.) is CANYON. I am having trouble believing that the USGS would have placed more than one BM on this point (about 100 ft wide and only about 20 feet wide at the point where the mark was). I would be happy to report a recovery of the mark and a correction to the 1902 report, but is there somewhere that I can search the USGS to find out for sure that this is the mark I was looking for and not a second mark? Oh, yah. I'll have to update the To Reach since all the original report has is Take the Wagon Rd. Oh, and the location is described as about 7 mi NE of a non-existant hotel. Oh, one more thing. Two of the marks I looked for were not located. Each was last described in 1934. The descriptions were sufficient to make sure that I was in the correct area, but in both cases, it would appear to me that the mark may be buried. One location the mark was described as in a limestone ledge, but the rubble has slid down the hillside and covered the ledge. The other was in a low lying area and was described as being 2" above the ground, but I suspect that the mud and plant matter may also have obscured this one as well. I would suspect that the marks are still there, but I didn't have a metal detector to search. Should I report the no recovery to NGS for these, or just leave well enough alone? Thanks for your help in these matters. Quote Link to comment
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