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CRFS Technical Meeting LC Operations Update March 30, 2010.

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Presentation on theme: "CRFS Technical Meeting LC Operations Update March 30, 2010."— Presentation transcript:

1 CRFS Technical Meeting LC Operations Update March 30, 2010

2 24- Month Study Projected Powell WY Unreg Inflow Projected Powell Apr- Jul Unreg Inflow Projected Lake Powell EOWY Elevation w/ 8.23 maf Release Projected Glen Canyon WY Release Projected Amount of EQ Release Projected Lake Mead EOWY Elevation Probability of EQ Jan 2010 77% 9.3 maf 78% 6.2 maf 3638.31 ft8.23 maf0.00 maf1077.02 ft21% Feb 2010 73% 8.9 maf 73% 5.8 maf 3634.80 ft8.23 maf0.00 maf1081.17 ft25% Mar 2010 69% 8.3 maf 68% 5.4 maf 3631.88 ft8.23 maf0.00 maf1081.36 ft3% Summary of Lake Powell and Lake Mead Operations 24-Month Study 2010 Water Year Projections In 2010, the Equalization Elevation is 3642 ft.

3 What happened January – March? Projected Lake Mead elevation end of WY 2010 increased 4.34 feet in 2 months Storm events in Southern California and Arizona Salt River Project full Alamo Dam releases Painted Rock Dam releases

4 Water Released from COE Dams March 2010 Provisional data from USGS gages Mar 1, 2010 – Mar 29, 2010

5 Summary of Lake Mead Elevation and Lake Havasu Water Use in early 2010

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8 End of Calendar Year 2010 LOTS of demand uncertainty –Unused agricultural water from January and February –Capacity constraints of junior priority users –ICS plans for creation and delivery are still in development Side Inflow uncertainty

9 Lower Basin Side Inflows Glen Canyon to Hoover in WY/CY 2010 1 Month in WY/CY 2010 Total Glen Canyon to Hoover (KAF) Total Glen Canyon to Hoover (% of Average 2 ) Difference From 5-Year Average (KAF) OBSERVEDOBSERVED October 20092342%-32 November 20093972%-15 December 20095189%-6 January 201012492%-11 February 201011283%-23 PROJECTEDPROJECTED March 2010101 April 201071 May 201073 June 201028 July 201061 August 2010106 September 201071 October 201055 November 201054 December 201057 WY10 Totals86091%-86 CY10 Totals91397%-6 1 Values were computed with the LC’s gain-loss model for the 24-month study 2 Percent of average was based on 5-year mean from 2005-2009

10 Lower Colorado River Operations For further information: http://www.usbr.gov/lc/region

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