BOARD00060 ‎(3)‎

• Board Meeting Date: 1/24/2007
• Description: WSP Section - Colorado River 7-State Agreement Approval
• Board Meetings - Doc Type: Memo

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Explanation ot Compromise Scenario
As ot 2\1\2006

Powell Powell Powell
Elevation Operation Live Storage
(ft) (mat)
3700 24.32
Equalize or 8.23 maf release
-------- expected 30% of time
------------------- ---------
3630.0 - 3664.4 14.85 - 19.08
(2006 - 2025) (2006 - 2025)
8.23 mat release
It Mead < 1075 balance contents
min\max release 7.0 and 9.0 mat
-------- ------------------- ---------
3575 9.52
7.48 mat release
If Mead < 1025
make 8.23 mat release
-------- ------------------- ---------
3525 5.93
Balance Contents
3490 4.00
(min. power)
min\max release 7.0 and 9.5 mat
3370 0.00

Historic Low - March 2005; Elevation 3555.90; Contents 8.015 mat

Mead Mead Mead
Elevation Operations Live Storage
(ft) tmat)
1220 Flood Control 25.94
------------- _ _o,!. .9~'!..n!'!!.4!._(LS~!P..!~ __ --------
70R Strategy I?.o.!'!!!.~ _S~!p.!.~ J !..42Q.~!}
------------- --------
1145 15.90
Prev. Partial Dom Surp
1125 Normal 13.85
9.0 mat release
------------- ---------------- f--------
1075 9.37
400 kat shortage
------------- ---------------- f--------
1050 7.47
(SNWAUpper Intake) 500 kat shortage (Min. Power)
------------- ---------------- 1--------
1025 5.80
600 kat shortage
1000 4.33
(SNWALow Intake)
895 0.00

Projected Low - May 2007; Elevation 1125.96; Content 13.947 mat

Mead below 1075 while Powell is in Upper Balancing Zone (eq line &3575) = 15% of time (295\98-20)
Mead below 1025 while Powell is in the 7.4818.23 Zone (3575 & 3525) = 2.6 % of time (51\98-20)
Mead below 1075 while Powell is in 7.4818.23 Zone (3575 &3525) & in previous year Powell in lower balance zone (below 3525)
=.9 % Of time (17\98*20)
Mead at or below 1075 & Powell in Upper Balancing Zone (eq line & 3575) and in previous year Powell in the 7.4818.23
= 3.2 % of time (62\98"20)
Blue indicates the previous operation strategy that did not change.
Red indicates portions ot previous strategy that were elimiated.
Black, In combination with Blue Indicates the proposed operations strategy