Subject: Re: [BoundaryPoint] source of rio grande etc
Date: Jan 31, 2004 @ 01:18
Author: Lowell G. McManus ("Lowell G. McManus" <mcmanus71496@...>)
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Mike,

You asked:

> or can anyone say if this rio source or metasource point was perhaps
> specified in the mxtx1836 treaty as the summit of canby mtn
>
> rather than the point to which the mainstream could be traced
> experimentally
> even above its headspring
> to the crest

The May 14, 1836 MXTX agreements called the "Treaties of Velasco" specified
little as to boundaries. They did provide for the withdrawal of the Mexican
army beyond the Rio Grande, and the Mexican dictator promised to work toward a
treaty of limits to provide that Texas would not lie south of the Rio Grande.
These "treaties" were never made official by either party. See
http://www.tsha.utexas.edu/handbook/online/articles/view/TT/mgt5.html .

The Texas claim to the Rio Grande as the boundary was formalized in a statute
passed by the Congress of the Republic on December 19, 1936, which declared the
boundary to be the Rio Grande from its mouth to its source, and from there
northward to the 1819 treaty line, etc.

So, that is the basis for the MXTXUS tripoint of 1836-1845 somewhere in modern
Wyoming.

As to which of the several tributaries in eastern San Juan County, Colorado, is
the true source of the Rio Grande, I have no firm opinion. Every time I've
found a detailed map naming one of them "Rio Grande," I find another map naming
the same as some creek or other and a different one as "Rio Grande." Not even
all USGS maps agree.

Lowell G. McManus
Leesville, Louisiana, USA