WSP01718

• File Number: 8210.140.20.A
• Description: Colorado River - Colo River Basin - Orgs/Entities - CRBSF - California - Colo River Board of Calif
• State: CA
• Date: 12/14/2004
• Author: Gerald Zimmerman
• Title: Executive Directors Monthly Report to the Colorado River Board of California
• Water Supply Pro - Doc Type: Report/Study

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o The quantity of water being mined from the groundwater aquifer and the
aquifer's safe yield (by conducting an annual water balance for the
groundwater aquifer in the Yuma area);
o Review and, as appropriate, modification of the unmeasured return flow
calculations for each of the Colorado River entitlement holders in the Yuma

area;
o Enforcement of Title 43 of the Code of Federal Regulations, Part 417, regarding
water conservation in a strict manner; and
o Elimination of all unauthorized use of Colorado River water in the Yuma area
and within the Lower Colorado River Basin.

Included in the Board folder is a copy of the December 151 letter to Bob Johnson
commenting on Reclamation's proposed Article V Decree accounting in the Yuma area.

Revision of Calendar Year 2004 Diversion Estimates for The Metropolitan Water District
of Southern California and the Central Arizona Water Conservation District

As occurred last month, both The Metropolitan Water District of Southern
California (MWD) and Central Arizona Water Conservation District (CA WCD) have
revised their estimates of diversion for Calendar Year 2004. This will permit both
agencies to divert mainstream water that is currently projected to be unused within the
states of Arizona and California. Based upon Reclamation's approval of the revised
diversion estimate, MWD will divert an additional 52,180 acre-feet of mainstream water.
This additional diversion amount will bring MWD's total 2004 diversion to 707,180 acre-
feet. Included in the Board folder is a copy of Reclamation's November 23'" letter to
MWD approving its revised diversion estimate,

Similarly, CAWCD has submitted a letter, dated November 17, 2004, to
Reclamation indicating how much mainstream water is projected to be diverted for the
remainder of 2004. Additionally, CA WCD's letter specifies that further adjustments to
its Lake Havasu diversions may be necessary if unused Arizona apportionment is
available prior to the end of the year. Alternatively, CA WCD indicated that any unused
Arizona apportionment not diverted should be retained within the reservoir system.

Revised Schedule of Calendar Year 2004 Water Deliveries to Mexico

Included in the Board folder is a copy of a letter from Reclamation to the
American Section of the International Boundary and Water Commission (mwC)
regarding Mexico's request to increase November water deliveries at the Southerly
International Boundary (SIB) and decrease deliveries at the Northerly International
Boundary (NIB). The Mexican request was made in order to facilitate an increase in
water deliveries to the City of Tijuana, Baja California del Norte. The change resulted in
a reduction of 186 acre-feet being delivered at the NIB during the month of November.

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