Boundary Lines, Facts & Figures

So I have already established the fact that the north-south boundary line that intersects at the Four Corners Monument was never meant to be on the 109th meridian as everyone assumes. That being said, the monument is still not exactly where it should be located. However, that fact is irrelevant because since all of the states involved have accepted the Four Corners Monument as the official meeting point of Utah, Colorado, New Mexico and Arizona, it is the legal boundary. Since the states have accepted the boundary, that trumps any written description of the boundary.
  Yes the north-south boundary is slightly off, but so is the east-west boundary, which is supposed to run precisely on 36 degrees north latitude. This line was not surveyed by Robbins. In fact this line was surveyed by quite a few people and none of them nailed it exactly.  As I mentioned in a previous installment about the Four Corners, there is a place where New Mexico, Colorado and Oklahoma all come together and the east-west border is 2 millimeters south of where it should be. But this line, even though it is a little bit off, is the legally accepted boundary between New Mexico and Colorado.
  In fact, there is a place on the New Mexico/Colorado border that is even farther off than 2 millimeters. About 150 miles due east of the Four Corners where the state border angles to the southeast for about half a mile before resuming its east-west journey. Twelve miles east of that point, there is a very slight, almost imperceptible slant back to the northeast. The slant is about 3 miles long but it is so slight that it only goes northward only about 1/10 of a mile. On the east side of New Mexico, where the state borders Texas, there was a correction made to an erroneous survey. At this point, New Mexico laps above the top of the Texas Panhandle for 2 1/4 miles. The New Mexico/Oklahoma border is precisely on 103 degrees west longitude, but the New Mexico/Texas border is 2 1/4 miles west of that line because of a serious surveying error that was made.
  In Yellowstone National Park, the border between Wyoming and Montana angles northward and southward several times.
  The border between Vermont and Quebec, supposedly on the 45th parallel, deviates from that line several times. The line is very erratic. In fact, the town of Derby Line, Vermont, which is located on the Canadian border, is north of the 45th parallel. Technically, it should be in Canada, but the presently accepted boundary line is official, thereby making Derby Line part of the United States. .
  People make a big deal about the fact the Four Corners is not exactly in the right place, but there are many, many borders that are not in exactly the right place.  It doesn't matter that the Four Corners monument isn't in the exact spot that it should be in because, since all 4 states involved have accepted, it is a legal border and none of the states involved have ever tried to move it.