WSP07460

• File Number: 8278.400
• Description: Title I - Mexican Treaty
• Basin: Colorado Mainstem
• Date: 2/1/1963
• Author: USDOI/BOR
• Title: Special Studies - Delivery of Water to Mexico
• Water Supply Pro - Doc Type: Publication

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San Luis, Arizona, and in the Limitrophe
Division of the Colorado River (that section
of the Colorado River between the
Northerly and Southerly International
Boundaries). The salinity of this delivery
would be substantially the same as the
waters customarily delivered there.

r.

. The United States would build a Bypass
Drain extending the MODE to carry the
YDP reject stream and bypassed irrigation
drainage to the Southerly International
Boundary and pay Merico to build an
additional extension through Merico to the
Santa Clara Slough, upstream from the
Gulf of California. (See frontispiece map.)

. The United States and Merico would limit
ground-water pumping within 5 miles on
each side of the Southerly International
Land Boundary near San Luis to
160,000 aere-feet annually.

. The United States and Merico would
consult each other before developing
surface- or ground-water resources in the
border area that might adversely affect
the other country,

. Measures required to implement this
resolution would be undertaken and
completed as soon as practicable, and the
United States would sesk prompt funding
for construction of the works needed to
fulfill the agreement,

Title I Provisions

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Public Law 93-320 was passed on June 24,
1974, to enable the United States to comply
with its obligations under Minute No, 242
without depriving the Basin States of any of
their apportioned water (Title I program)
and to authorize projects to control the
salinity of the water delivered to users in
the United States (Title II program),

Section 101(bXI) of Public Law 93-320
authorized (I) construction, operation, and

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Title I History and Provisions

maintenance of a desalting plant to remove
salts from WMIDD irrigation drainage;
(2) construction of the necessary ap-
purtenant works; (3) construction of the
Bypass Drain from Morelos Dam to the
Santa Clara Slough to dispose of reject
stream from the desalting plant and other
bypassed water; (4) replacement of the
metal flume in the existing MODE with a
concrete siphon; (5) reduction ofWMIDD
irrigation drainage by improving irrigation
efficiencies and acquiring irrigation district
lands; (6) acquisition oflands in Painted
Rock Reservoir, as necessary, for flood
control (the Painted Rock Reservoir land
acquisition program was not completed
because the United States determined that
sufficient storage capacity exists to operate
the reservoir in accordance with its
obligations under Minute No, 242); and
(7) construction, operation, and main-
tenance of all associated facilities including
roads, railroad spur, and transmission lines.

Section 101(bX2) specified the initial plant
characteristics and stated that "the power
supply for the desalting complex will not
diminish the supply of power to preference
customers from the Federal power systems
operated by the Secretary," and that "all
costs associated with the desalting complex
shall be nonreimbursable except as provided
in sections 101(fXI) and 101(h),"

Section 102(a) authorized concrete lining of
the first 49 miles of the Coachella Canal of
the Boulder Canyon Project, California. For
an interim period, the United States has
use of an amount of water equal to that
conserved by lining the canal (about
132,000 acre-feet per year), The conserved
water provides a source of replacement
water for WMIDD irrigation drainage
bypassed to meet the salinity differentia},

Also, as defined in section 102(a), the
interim period of use began when canal
lining was completed in 1982 and

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