TeamTJ Posted January 20, 2003 Share Posted January 20, 2003 For this benchmark one description says quote:set into the top of a round concrete monument and another says quote:THE UNDERGROUND DISK IS SET IN AN IRREGULAR MASS OF CONCRETE 36 INCHES BELOW THE SURFACE OF THE GROUND. yet another says quote:THE SURFACE DISK IS SET IN THE TOP OF A SQUARE CONCRETE POST WHICH IS FLUSH WITH THE SURFACE OF THE GROUND. I'm confused!! Is it at the top of the memorial tower, on the ground surface, or below the ground? I tried to get it by looking at the given measurements from the pumping station & fences, but it's WAY off from the tower and there is really nothing on the ground at that spot. HELP! Morgan TeamTJ Quote Link to comment
+happycycler Posted January 20, 2003 Share Posted January 20, 2003 Based on the description, I would look for a mark at ground level. Sometimes a ground level mark gets covered up by dirt and vegetation. I would expect that your GPSr (if you use one) might get you close since the coordinates are adjusted from a geodetic survey. In my limited benchmark searching, I have also found that not all landmarks listed in older descriptions have survived down to the present time. More experienced searchers will have other & better suggestions. Good luck & keep having fun! Quote Link to comment
survey tech Posted January 20, 2003 Share Posted January 20, 2003 Thats right, it is or was a typical ground marker. The original was probably in a round concrete base and the reset in a square base. The underground mark is irrelevant since you would not see it anyway. Its an example of the fairly rare occurence of a marker being reset in precisely the same position after construction. The note says that visibility from the spot was no longer very good, so its possible that it may have been deemed not useful enough to reset again, and was probably replaced by an undocumented point somewhere else in the vicinity at a better spot. If you are saying that there is now a tower on the spot and the pump house, transformers and fences are all gone, this is likely to be what happened. Quote Link to comment
TeamTJ Posted January 20, 2003 Author Share Posted January 20, 2003 Hmmmm... There is a large tower (50-100 feet tall, 30-40 feet diameter) and the pumphouse is there still, too. I looked for a ground marker, but saw none. For the uneducated (me) how do I know that it would be a ground marker, and not the other 2 choices? Thanks! TeamTJ Quote Link to comment
Z15 Posted January 20, 2003 Share Posted January 20, 2003 quote:JE1942''FOLLOWING IS A DESCRIPTION FOR THE STATION MARK.JE1942'' JE1942''STATION MARKS ARE STANDARD DISKS STAMPED HOLMES 1934 1968. THE JE1942''SURFACE DISK IS SET IN THE TOP OF A SQUARE CONCRETE POST WHICH IS JE1942''FLUSH WITH THE SURFACE OF THE GROUND. IT IS 45.5 FEET EAST OF THE JE1942''EAST EDGE OF A MANHOLE COVER, 34.5 FEET WEST-SOUTHWEST OF THE JE1942''NORTHWEST CORNER OF THE PUMPING STATION, 32.5 FEET SOUTHEAST OF JE1942''THE SOUTHEAST CORNER OF A CYCLONE FENCE AROUND VOLTAGE JE1942''TRANSFORMERS, 29.5 FEET WEST-NORTHWEST OF THE SOUTHWEST CORNER JE1942''OF THE PUMPING STATION, AND 15 FEET NORTHEAST OF A FENCE AROUND JE1942''THE PUMPING STATION. THE UNDERGROUND DISK IS SET IN AN JE1942''IRREGULAR MASS OF CONCRETE 36 INCHES BELOW THE SURFACE OF THE JE1942''GROUND. Use the newest description. It says its a concrete post flush with the ground surface. There underground mark is 3 feet deep. Quote Link to comment
TeamTJ Posted January 21, 2003 Author Share Posted January 21, 2003 But why does it say quote:Setting: set into the top of a round concrete monument then? Forgive my ignorance, I just am new to benchmarks and trying to decipher their descriptions... Morgan TeamTJ Quote Link to comment
Z15 Posted January 21, 2003 Share Posted January 21, 2003 Its just a typo from what I surmise I have seen this many times where the post is said to be round and it actually square in the field and vice-versa. fyi When the combined all this data into a database, they had to type serveal 100,000 points into the system. They did not start the DB in the 1700's but comiled this info in the 80's and 90's into the DB there is today. All this data has to be hand keyed in and mistakes are common. So don't be alarmed if something is not exactly as described. They did a pretty good job considering all the information that is in the DB's. Quote Link to comment
survey tech Posted January 21, 2003 Share Posted January 21, 2003 If it were an above ground mark there would be some reference to its height. If its still there and not within the fenced area, it sounds like it should be an easy find using the distances given from the objects. Quote Link to comment
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