WSP01693

• File Number: 8278.400
• Description: Title I - Mexican Treaty and Minute 242
• Basin: Colorado Mainstem
• Date: 1/1/1974
• Author: IBWC
• Title: Minute 242 Annual Report
• Water Supply Pro - Doc Type: Annual Report

4

.

Salinities of the waters delivered to Mexico on the land boundary
at San Luis were:

Total Dissolved Solids
Period (U.S. Count)

June 25, 1974 through December 31, 1974 1515 ppm

January 1, 1975 through December 31, 1975

1500 ppm

These salinities were substantially the same as the salinities
of the waters customarily delivered on the land boundary, which
averaged about 1540 ppm for the ten-year period 1963-1972.

Progress on United States Measures Provided for in P.L. 93-320

.

The progress made on the permanent measures to be taken and the
works to be constructed, operated, and maintained in the United
States by the Secretary of the Interior, pursuant to Public Law 93-320,
Title T, to enable the United States to comply with the provisions
of Minute No. 242, is described in the Bureau of Reclamation's status
report as of December 1, 1975, copy attached as Exhibit 3. The
status report shows that the desalting plant is scheduled to be
in operation in December 1981.

Progress on the' Bypass Drain in Mexico

To implement Point 4 of Minute No. 242, providing for an extension
of the concrete-lined Well ton-Mohawk Bypass Drain in Mexico at the
expense of the United States, and pursuant to Minute No. 248,
adopted by the Commission on June 10, 1975, Mexico prepared and
submitted to the Commission engineering plans for construction of
an ext'enst'on-W11:tlac!I,I,rc1:ty of 35~CuDt'c-reR-('lO-cuD1-c-meters)
per second, from the international boundary between Arizona and
Sonora to the Santa Clara Slough, on the Gulf of California, a
distance of approximately 35 miles (56 kilometers). The plans
were approved by the Commission with certain suggestions in
August 1975, and in accordance with Minute No. 248, the United
States under the authorization in P.L. 93-320, in October 1975
established an irrevocable credit in favor of Mexico in the amount
of $11.2 million, to be drawn upon by Mexico with the countersignature
of the United States and Mexican Commissioners. Bids were invited
by Mexico for the construction of the drain in its territory
in two parts. Awards were made to the lowest bidder for the
downstream part in November and for the upstream part in
Decembe~ 1975. Construction began on the lower

.