I received in today's mail from the IBWC the promised copy of the 1970 boundary
treaty that currently governs the river portions of the boundary (Rio Grande and
Colorado River). It is fairly long. It contains lots of tables of coordinates
for boundary relocations in short stretches of the Rio Grande that are to be
channelized. It incorporates by reference three large folded aerial photomaps
of the relocations and two folded maps of the maritime boundaries in the Gulf of
Mexico and the Pacific Ocean. I have the maps, as well.

I will abstract the salient points and post them as soon as I get it done. From
a cursory examination, it seems to me that they should have left well-enough
alone with the 1884 treaty's treatment of bridges. They have indeed changed
things from how we finally decided they should be in light of the 1884 treaty as
quoted by L.N. a few day ago! So, it's back to the drawing board on trying to
determine if there is vertical differentiation or not. I don't know yet whether
I think there is, but I certainly hope not. There's a lot to be digested first.
So, to the abstracting chores...

Lowell G. McManus
Leesville, Louisiana, USA