WSPC12517

• File Number: 8282.400
• Description: Colorado River Operations and Accounting - Deliveries to Mexico
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/3000
• Author: Unknown
• Title: Excerpts From and Comments On Treaty Between the USA and Mexico - RE-Colorado River-Mexican Delta Issues - Includes Entire Treaty - Treaty Signed 11-14-44 - Comment Date Unknown
• Water Supply Pro - Doc Type: Report/Study

001951

Schedule II shall cover the delivery at the boundary line by means of the All-American Canal of 500,000 acre-feet
(616,745,000 cubic meters) of water each year from the date Davis dam and reservoir are placed in operation until January
1,1980 and the delivery of375,000 acre-feet (462,558,000 cubic meters) of water eacb year tbereafter. Tbis scbedule sball
be formulated subject to the following limitations:

With reference to the 500,000 acre-foot (616,745,000 cubic meter) quantity:

(a) During the months of January, February, October, November and December the prescribed rate of delivery shaD be
not less than 300 cubic feet (8.5 cubic meters) nor more than 2,000 cubic feet (56.6 cubic meters) per second.
(b) During the remaining months of the year the prescribed rate of delivery shaD be not less than 500 cubic feet (14.2 cubic
meters) nor more than 2,000 cubic feet (56.6 cubic meters) per second. With reference to the 375,000 acre-foot (462,558,000
cubic meter) quantity:

(a) During the months of January, February, October, November and December the prescribed rate of delivery shaD be
not less than 225 cubic feet (6.4 cubic meters) nor more than 1,500 cubic feet (42.5 cubic meters) per second.
(b) During the remaining months of the year the prescribed rate of delivery shaD be not less than 375 cubic feet (10.6 cubic
meters) nor more than 1,500 cubic feet (42.5 cubic meters) per second. B. The United States shaD be under no obligation to
deliver, through the All-American Canal, more than 500,000 acre-feet (616,745,000 cubic meters) annually from the date
Davis dam and reservoir are placed in operation until January I, 1980 or more than 375,000 acre-feet (462,358,000 cubic
meters) annually thereafter. If, by mutual agreement, any part of the quantities of water specified in this paragraph are
delivered to Mexico at points on the land boundary otherwise than through the AD-American Canal, the above quantities
of water and the rates of deliveries set out under Schedule II ofthis Article shall be correspondingly diminished.

C. The United States shall have the option of delivering, at the point on the land boundary mentioned in subparagraph (c)
of Article 11, any part or all of the water to be delivered at that point under Schedule II of the Article during the months of
January, February, October, November and December of each year, from any source whatsoever, with the understanding
that the total specified annual quantities to be delivered through the All-American Canal shaD not be reduced because of
the exercise ofthis option, unless such reduction be requested by the Mexican Section, provided that the exercise ofthis
option shall not have the effect of increasing the total amount of scheduled water to be delivered to Mexico.

D. In any year in which there shaD exist in the river water in excess of that necessary to satisfy the requirements in the
United States and the guaranteed quantity of 1,500,000 acre-feet (1,850,234,000 cubic meters) allotted to Mexico, the
United States hereby declares its intention to cooperate with Mexico in attempting to supply additional quantities of water
through the All-American Canal as such additional quantities are desired by Mexico, if such use of the Canal and facilities
will not be detrimental to the United States, provided that the delivery of any additional quantities through the AU-
American Canal shall not have the effect of increasing the total scheduled deliveries to Mexico. Mexico hereby declares its
intention to cooperate with the United States by attempting to curtail deliveries of water through the All-American Canal
in years of limited supply, if such curtailment can be accomplished without detriment to Mexico and is necessary to allow
full use of all available water supplies, provided that such curtailment shaD not have the effect of reducing the total
scheduled deliveries of water to Mexico.

E. In any year in which there shaD exist in the river water in excess of that necessary to satisfy the requirements in the
United States and the guaranteed quantity of 1,500,000 acre-feet (1,850,-234,000 cubic meters) aDotted to Mexico, the
United States Section shall so inform the Mexican Section in order that the latter may schedule such surplus water to
complete a quantity up to a maximum ofl,700,OOO acre-feet (2,096,931,000 cubic meters). In this circumstance the total
quantities to be delivered under Schedules I and II shaD be increased in proportion to their respective total quantities and
the two schedules thus increased shaD be subject to the same limitations as those established for each under paragraph A
of this Article.

F. Subject to the limitations as to rates of deliveries and total quantities set out in Schedules I and II, Mexico shall have the
right, upon thirty days notice in advance to the United States Section, to increase or decrease each montbly quantity
prescribed by those schedules by not more than 20% ofthe monthly quantity.

G. The total quantity of water to be delivered under Schedule I of paragraph A of this Article may be increased in any year
if the amount to be delivered under Schedule II is correspondingly reduced and if the limitations as to rates of de livery
under each schedule are correspondingly increased and reduced.

IV - Tijuana River

Article 16

In order to improve existing uses and to assure any feasible further development, the Commission shall study and
investigate, and shall submit to the two Governments for their approval:

(1) Recommendations for the equitable distribution between the two countries of the waters of the Tijuana River system;
(2) Plans for storage and flood control to promote and develop domestic, irrigation and other feasible uses of the waters of
this system;
(3) An estimate of the cost of the proposed works and the manner in which the construction of such works or the cost
thereof should be divided between the two Governments;
(4) Recommendations regarding the parts ofthe works to be operated and maintained by the Commission and the parts to
be operated and maintained by each Section.

The two Governments through their respective Sections of the Commission shall construct such of the proposed works as
are approved by both Governments, shall divide the work to be done or the cost thereof, and shall distribute between the
two countries the waters ofthe Tijuana River system in the proportions approved by the two Governments. The two
Governments agree to pay in equal shares the costs of joint operation and maintenanee of the works involved, and each
Government agrees to pay tbe cost of operation and maintenance of the works assigned to it for sucb purpose.