+2oldfarts (the rockhounders) Posted August 24, 2009 Share Posted August 24, 2009 Went looking for a benchmark today with no luck. We have no clue where to even begin looking for this one after being on site. We think 2 datasheets may have been combined and so the directions don't fit with what is on site. Here is a link to J 52 & to the GC page which reads the same as the NGS datasheet. "1/1/1934 by CGS (MONUMENTED) DESCRIBED BY COAST AND GEODETIC SURVEY 1934 0.3 MI E FROM FREDONIA. 0.2 OF A MILE EAST OF INTERSECTION OF U.S. HIGHWAY NO. 89, AND ROAD TO PIPE SPRINGS. 53 FT. NORTH WEST OF ARIZONA HIGHWAY BENCH MARK WITH STATION NO. 0 PLUS 00. 12 FT. SOUTH OF CENTER LINE OF U. S. HIGHWAY NO. 89. 19 FT. NORTH OF TELEPHONE POLE LINE. SET IN CENTER OF SOUTH HEADWALL OF DOUBLE 3 FOOT PIPE CULVERT." The first thing that becomes apparent is "12 feet south of highway 89". The mark is 2/10 of a mile east of 89 and the junction of 389. Highway 89 runs north & south at the described location. 2/10 mile east of the highway AND 12 feet south of the highway cannot be possible. The other problem is the setting. According to the datasheet "SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT", but the description says "SET IN CENTER OF SOUTH HEADWALL OF DOUBLE 3 FOOT PIPE CULVERT." definitely not a concrete monument. Here is a picture showing the general area in the description. Any help would be appreciated. Along these same lines there are 2 other benchmarks that we have looked for on several occasions and have not been able to find. The areas where the benchmarks are supposed to be do not appear to have been disturbed by heavy equipment or road work. Anyone who will be in the area (between Lee's Ferry and the North Rim of the Grand Canyon Highway 89A) and would like to help an old fart out, please let me know so I can get time off work and enjoy your help. John Quote Link to comment
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