May 9, 2002
David Murillo
509-575-5848 Ext. 213

The May 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 April - 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	2.73 million acre-ft
With 100% normal subsequent conditions	2.88 million acre-ft
With 150% normal subsequent conditions	3.04 million acre-ft.

The Title XII target flow at the Yakima River near Parker gaging station is 500 cfs based on the May 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 early July. Once the project is on Storage Control, system reservoir volume will decline as water is released to meet demands.

Storage Conditions as of May 1 were as follows:

Reservoir	Content (acre-feet)	Total Capacity	Percent of Capacity
Keechelus	122,437	140,300	87
Kachess	149,016	239,000	62
Cle Elum	277,100	436,000	63
Bumping	26,248	33,700	78
Rimrock	157,740	198,000	80
Totals	732,542	1,047,9001	70

1Keechelus capacity is currently restricted to 140,397 acre-feet. Normal capacity is 157,800 acre-feet.
2Reservoir is currently 508,414 as of April 7, 2001, 48% capacity, 62% of average.