WSP11220

• File Number: 8281.300
• Description: Colorado River Studies and Investigations - Colorado River Consumptive Uses and Losses Report
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 3/1/1991
• Title: Decree Accounting -- methodology used for monthly and yearly water-use accounting of Colorado River water -- Part 2 of 2
• Water Supply Pro - Doc Type: Report/Study

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procedures. Since this statement appears in a yearly compilation, the likely
inference would seem to be that this value is used for the yearly
computations. Contact with the USGS should be made to modify or remove this
reference to accounting use to avoid the incorrect inference. Records
furnished by MWD showing seepages for Copper Creek No.2. Copper Creek No.3.
and Gene Canyon No.2, are not used in the
computations. Reports are filed with LC-431 in the MWD Return Flow binder.

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Palo Verde Irrioation District - Palo Verde return flow credit is the sum of

the following flows.
1.) PVID Olive Lake Drain - USGS Station 09429130
2. ) PVID F Spill - USGS Station 09429155
3. ) PVID D-l0-11-2 Spill - USGS Station 09429160
4. ) PVID 0-10-11-5 Spill - USGS Station 09429170
5. ) PVID D-23 Spill - USGS Station 09429180
6. ) PVID 0-23-1 Spill - USGS Station 09429190
7. ) ?VID C Spill - USGS Station 09429200
B. ) PVID C-28 Upper Spill - USGS Station 09429210
9. ) PVID Outfall Drain - USGS Station 09429220
10. ) PVID C-28 Lower - USGS Station 09429230

Return flows are available on a daily basis from Water Scheduling at the Lower
Colorado Dams Project Office or may be read off the Data Listing for the BHOPS
program. The value given on the BHOPS Data Listing is the sum of all drain
flows listed above. Monthly values for each drain are given on the USGS
monthly provisional listings. The USGS Water-Data Report lists summed values
for all drains by month. The USGS final calendar year report lists the drains
separately by month.

HavaSll National Wildlife Refllee - Monthly values may be taken fro," 'the USGS
monthly proviaionals for USGS Station 09423550. Topock Marsh Inlet Near
Needles. CA. Flows through Tapock Marsh Outlet are listed in this table.
Outlet flows are the return flows for the Refuge.

Colorado Rive~ Indian Reservation (AZ) - The Colorado River Indian Reservation
return flow credit is computed by summing the flows from.

1.) Gardner Lateral Spill - USGS Station 09428505
2. ) Poston Wasteway - USGS Station 09428510
3. ) Palo Verde Drain - USGS Station 09429030
4. ) CRIR Lower Main Drain - USGS Station 09429060

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