1. Eric Kuhn General Manager, Colorado River Water Conservation District

2. Congressional Briefing June 6, 2008 – Washington, DC Eric Kuhn, General Manager

3. Pieces of the Puzzle: the Colorado River Basin

4. = 10.0 maf/year OUTFLOW - 4.4 maf California - 0.3 maf Nevada - 1.0 maf losses - 2.8 maf Arizona - 1.5 maf Mexico Lake Powell OUTFLOW > INFLOW Lower Basin Lake Mead Upper Basin = 9.0 maf/year INFLOW + 0.02 maf Paria River + 0.75 maf tributary inflow + 8.23 maf from Lake Powell normal year operations releases from Lake Powell = 8.25 million acre-feet(maf) /year 7.5 maf for Lower Basin 0.75 maf for Mexico normal year operations releases from Lake Powell = 8.25 million acre-feet(maf) /year 7.5 maf for Lower Basin 0.75 maf for Mexico Colorado River Compact measuring point at Lee Ferry X

5. Challenges Climate change Hydrologic Variability (paleo record) Forest Changes Energy future

6. Projected Central Arizona Project (CAP) Shortages Source: USBR shortage criteria EIS direct paleo hydrology modeling www.ColoradoRiverDistrict.org

7. Three Policy objectives Avoid unacceptable outcomes Maintain constructive relationships Adapt to a wider range of hydrologic conditions Avoid unacceptable outcomes Maintain constructive relationships Adapt to a wider range of hydrologic conditions