WSP08096

• 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 1 of 2
• Water Supply Pro - Doc Type: Report/Study

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Lines 17 and 18 - The values to be entered for Lines 17 and 18 are he values
from Lines 25 and 26 of the completed A.F.-Diverted-at-Siphon-Drop coluan on
the Yuma Main WLDS, respectively.

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Lines 2' and 22 - The values to be entered for Lines 21 and 22 are the values
from Lines 28 and 29 of the completed A.F.-Diverted-at-Siphon-Drop coluan on
the Yuma Main WLDS, respectively.

Line 23 - The value to be entered for Line 23 is the value from Line 30 of the
completed A.F.-Diverted-at-Siphon-Drop column on the Yuma Main WLDS.

Line 24 - The value to be entered for Line 24 is the value from Line 27 of the
completed A.F.-Diverted-at-Siphon-Drop column on the Yuma Main WLDS.

Line 2! - The value entered here is computed as follows'

1.) Sum the values for the appropriate month of Columns 23. 24. and.
if present. 39 (Recharge) of the monthly IID-660 report furnished by lID.

2.) Divide the value for the appropriate month of Column 24 of the
IID-660 report by the result of Step 1.

3.) Multiply the result of Step 2 by the flow in the All-American
Canal below Pilot Knob Wasteway (USGS Station 09527500). Assure that units of
flow (cfs. af) are consistent in the computations.

As a formula. the eompu~a~ion may be expressed as:

(24/(23+24+39))~Q09527500. where the numbers indicate the appropriate
values in coluans so numbered on the IID-660 report and Q09527500 is the flow
below Pilot Knob Wasteway on the AAC.

Monthly accounting uses values on the YFO monthly FAX or the USGS provisional
listings and the monthly IID-660 report. Yearly accounting should use the
final USGS flow values and the annual summary for the IID-660 furnished by
lID.

Line 26 - The en~ry for this line is compu~ed using the same da~a sources as
'for Line 25 and a similar computational s,cheme. As a formula the value may be
expressed as:
(23/(23+24+39))~Q09527500. where terms are analogous to those described

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