June 10, 2002
David Murillo
509-575-5848 Ext. 213

The June 2002 forecast of water supply based on snowpack and precipitation data available on the first of Mayl indicates a full water supply for all users for the coming irrigation season.

Converting the June- September runoff forecast (natural flow) to total water supply available (TWSA) gives the following volumes for the April through September use period:

With 50% normal subsequent conditions	2.28 million acre-ft
With 100% normal subsequent conditions	2.36 million acre-ft
With 150% normal subsequent conditions	3.45 million acre-ft.

The Title XII target flow at the Yakima River near Parker gaging station is 500 cfs based on the June 1 forecast. Total demand to be placed against this supply for irrigation, regulation and flows passing Sunnyside Dam averages 2.5 million acre-feet per season.

Storage Control is expected to begin sometime in the first half of July. Once the project is on Storage Control, system reservoir volume will decline as water is released to meet demands. All reservoirs are expected to fill this season.

Storage Conditions as of May 1 were as follows:

Reservoir	Content (acre-feet)	Total Capacity	Percent of Capacity
Keechelus	122,462	140,3001	98
Kachess	146,472	239,000	82
Cle Elum	404,891	436,000	93
Bumping	33,684	33,700	100
Rimrock	192,990	198,000	97
Totals	965,499	1,047,900	92

1Keechelus capacity is currently restricted to 140,300 acre-feet. Normal capacity is 157,800 acre-feet.