2009 Water Supply Summary Liz Cresto. Water Year Highlights Precipitation and Water Use: –Boise –Snake –Bear –Salmon.

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Presentation transcript:

2009 Water Supply Summary Liz Cresto

Water Year Highlights Precipitation and Water Use: –Boise –Snake –Bear –Salmon

The 2009 Water Year Normal snowpack.Normal snowpack. Late season snow.Late season snow. Rain in June and August.Rain in June and August.

2009 April-July Runoff Snake R. nr Heise* 3978 kaf 120 % of avg 73 rd / 99 years Big Wood at Hailey % 60 / 94 Boise R. nr Boise* % 45 / 114 Payette at HSB* % 38/ 90 Weiser nr Weiser % 18 / 67 Snake at Weiser % 47 / 99 Salmon at Whitebird % 63 / 97 St. Joe at Calder % 37 / 91 Bear at Stewart Dam % 30 / 50 * calculated natural flow

Boise River

Return to Climate Charts Web page. Climate Charts Return to Climate Charts Web page. Climate Charts Return to Climate Charts Web page. Climate Charts Rare Precipitation Events in June and August Return to Climate Charts Web page. Climate Charts

August Storm on the Boise Natural flow increased but operational loss also increased. Stewart Decree went from 60% to 75% delivery.

Snake

Recharge Spring 104,000 Acre-Feet Fall anticipate approximately 25,000 Acre- Feet

Bear River

Salmon

Chinook Salmon spawning in Iron Creek, tributary to Salmon River between Challis and Salmon. Site of IWRB’s first 20-year agreement not to divert (2007).

Summary Good water supply. June Rains eased irrigation demand. Decent carryover for next year. Think Snow!