WSP09883

• File Number: 8273.100
• Description: Colorado River Basin Salinity Control - Federal Agency Reports - BOR
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 9/1/1973
• Title: Colorado River International Salinity Control Project - Special Report - Executive Summary
• Water Supply Pro - Doc Type: Report/Study

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to Mexico upstream of Morelos Dam, have an annual
average salinity of no more than 115 ppm + 30 ppm
U.S. count (121 ppm ~ 30 ppm Mexican count) over
the annual average salinity of Colorado River waters
which arrive at Imperial Dam, with the understanding
that any waters that may be delivered to Mexico under
the Treaty of 1944 by means of the All-American Canal
shall be considered as having been delivered
upstream of Morelos Dam for the purpose of
computing this salinity.

lib)

The United States will continue to deliver to
Mexico on the land boundary at San Luis and in
the limitrophe section of the Colorado River down-
stream from Morelos Dam approximately 140,000
acre-feet (172,689,000 cubic meters) annually with
a salinity substantially the same as that of the
waters customarily delivered there.

"C)

Any decrease in deliveries under point l(b) will
be made up by an equal increase in deliveries
under point l(a).

lid)

Any other substantial changes in the aforementioned
volumes of water at the stated locations must be
agreed to by the Commission.

lie)

Implementation of the measures referred to in
point l(a) above is subject to the requirement in
point 10 of the authorization of the necessary
works.

"2. The life of Minute No. 241 shall be terminated upon
approval of the present Minute. From September 1, 1973,
until the provisions of point l(a) become effective, the
United States shall discharge to the Colorado River down-
stream from Marelos Dam volumes of drainage waters from
the We11ton-Mohawk District at the annual rate of
118,000 acre-feet (145,551,000 cubic meters) and substi-
tute therefor an equal volume of other waters to be
discharged to the Colorado River above Marelos Dam; and,
pursuant to the decision of President Echeverria expressed
in the Joint Communique of June 17,1972, the United States
shall discharge to the Colorado River downstream from
Marelos Dam the drainage waters of the Wellton-Mohawk
District that do not form a part of the volumes of drainage
waters referred to above, with the understanding that this
remaining~volume will not be replaced by substitution
w.ters. The Commission shall continue to account for the

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