WSP12678

• File Number: 8282.300
• Description: Lower Colorado River Administration
• Basin: Colorado Mainstem
• Date: 7/1/2000
• Author: USDOI/BOR
• Title: Calendar Year 1999 Compilation of Records in Accordance with Article V of the Decree of the Supreme Court of the United States in Arizona V. California Dated March 9, 1964
• Water Supply Pro - Doc Type: Data

DIVERSIONS FROM MAINSTREAM-AVAILABLE RETURN FLOW
AND CONSUMPTIVE USE OF SUCH WATER
CALENDAR YEAR 1999
STATE OF ARIZONA

07/1412000

(ACRE-FEET)

WATER USER

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC TOTAL 11

7/ Summation for the Yuma Mesa Division, consisting of the North Gila Valley Irrigation District, the Yuma Irrigation District, and the Yuma Mesa
Irrigation & Drainage District Is as follows:
Item Annual Totals (Acre-Feet)

Diversion at Imperial Dam AI 332153
Pumped from wells 1846
Surface retums from South Gila Valley (S.Gila Canal Wasteway) 1614.
Retum flow North Gila Valley (6 drains & wasteways) n55 .
Retum flow South Gila Valley wells (DPOC's) 74223
Retum flow Yuma Mesa Outlet Drain BI 32581 .
Retum flow protective and regulatory pumping unit C/ 3366 .
Estimated unmeasured groundwater retum flow 0/ 25416
Retum flow share of Gila Main Canal loss EI 14421 .
Subtotal retum flow F/ 159375 159375 check from above
Consumptive Use (see note above) 174624 174624 check from above
(A) Total for the North Gila Valley, The Yuma Irrigation and the Yuma Mesa Irrigation and Drainage Districts, and 'Unit B'.
(B) Eatimat~ st 85 psr=nt of the Yuma ~..~ee-a OLrt!e! Drain with balance credited to 'Unit Bt.
(C) Estimated at 85 percent of Protective and Regulatory Pumping Unit with balance credited to 'Unlt B'.
(D) Estimated at 38 percent of the North Gila Valley Diversion at Imperial Dam plus 14 percent of Yuma Irrigation District diversion at
Imperial Dam. (Based on analysis of the USGS Report 83-4220 entitled 'A Method for Estimating Ground-Water Retum Flow to the
Lower Colorado River in the Yuma Area')
(E) Diversion"milage weighted share of Gila Main Canal loss less canal surface evaporation (1397 aflyr) and phreatophytes (2154 aflyr).
(F) Additional unmeasured amounts of return flows from the Yuma Mesa Irrigation and Drainage District, 'Unit B', the Cocopah Indian
Reservation. and the Yuma County Water Users Association (YCWUA) are utilized to meet consumptive uses in the United States and in
partial satisfaction of the Mexican Treaty obligation. Some of thes underground flows are recovered by pumping from wells on the
Cocopah Indian Reservation and in the YCWUA area. and by some of the surface drains in the YCWUA area. Efforts will be made to at least
quantify these return flows within broad limits by respective water user entities in future years.
81 Diversion adjusted for delivery to Mohave Valley I. D. D. (Chesney).
9/ Main Outlet Drain return flow credit is measured flow at Station 0+00 and includes both Colorado River and Gila River water, Reclamation
is working to develop a method to separate the different sources of return flow and will apply that methodology when available.
10/lncludes 1 river pump, CRIT tribal usage delivered by the Town of Parker has been deducted.
11/ Annual Totals are rounded to the nearest lOAF.

14