WSP09503

• File Number: 8278.400
• Description: Title I - Mexican Treaty
• Basin: Colorado Mainstem
• Date: 5/10/1962
• Author: CWCB - D. Hamburg
• Title: Mexican Water Treaty Negotiations Pertaining to the Colorado River
• Water Supply Pro - Doc Type: Publication

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control works, this being left for a future determination by the
commission. This article was apparently agreed to because the
largest recorded floods in the lower Colorado River have had their
origin in the Gila River and not in the main stream of the Colorado
River. Hence these floods would be unaffected by the construction
of Boulder Dam and other regulatory works of the Colorado River.

Article 14

This article provides that the construction costs, main-
tenance and operation costs of Imperial Dam and the Imperial Dam-
pilot Knob section of the All-American Canal shall be borne pro-
portionately by Mexico and the United States in proportion to the
amount of water delivered annually through such facilities for use
in each of the two countries. If hydroelectric power is generated
at pilot Knob, the revenues from the sale of such power shall
reduce Mexico's portion of such costs in the same portion as the
balance of the total costs are reduced or repaid. Mexico does not,
however, acquire any interest in these facilities.

Article 15

;< The intention of this article, according to the testimony
before the Senate Foreign Relations Committee, was to conform de-
liveries of water to the then current pattern of use of water in
Mexico. The importance of following these schedules was to insure
credit to the United States for its drainage return and other excess
flows. This is illustrated by the provisions for minimum rates of
delivery during the months of January, February, October, November,
and December of each year. During these months there is always
expected to be a certain quantity of water flowing in the river
which would pass to Mexico in any event but for which the United
States desired to receive credit against Mexico's allotment. The
overall effect of this is to require a more economical use of water
in Mexico and at the same time assure to the United states credit
for its return and other waste waters.

Schedule 1 sets up the deliveries of water to Mexico of
1,000,000 acre-feet of water each year until 1980 and the delivery
of 1,125,000 acre-feet after that year. Schedule 2 sets up the
delivery through the All-American Canal of 500,000 acre-feet until
the year 1980 and 375,000 acre-feet after the year 1980. The
Mexican section is to formulate and present to the commission at
the beginning of each calendar year, the schedules of deliveries.
AS will be noted, these schedules are subject to certain limita-
tions, especially in regard to minimum and maximum rates of flow

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