Drought Contingency Plan (DCP) City Council Workshop April 23, - PowerPoint PPT Presentation

Drought Contingency Plan (DCP) City Council Workshop April 23, 2019

Glendale Water Sources 2018 Use = 45,868 acre-feet 6% 6% 44% 44% Salt River Project (SRP) Central Arizona Project (CAP) Groundwater Effluent 2

Colorado River Supply Central Arizona Project (CAP) Water: • Current CAP Supply Total = 22,582 AF/year • Additional White Mountain Apache Tribe CAP Lease (2021) = 2,363 AF/year • Current CAP Total Demand = 18,000 AF/year 3

Colorado River/CAP System • Upper Basin States • CO, WY, NM and UT • Lower Basin States • AZ, NV and CA • Current Conditions • Lake Mead • Lake Powell 4

Lake Mead Conditions 1.2 MAF/ Year Deficit 9.0 MAF 10.2 MAF = 12 Feet / Year of Water Level Drop _ Annual Diversions & (Inflows) Evaporation (Outflows) 1,075 Foot Elevation 1,050 Foot Elevation 1,025 Foot Elevation Dead Pool 100,000 Acre-Feet Loss of Water = One Foot Drop in Water Level 5

Lake Mead – End of 2019 Bureau of Reclamation - Predictive Colorado River System Modeling: • Most probable Lake Mead water level elevation on December 31, 2019 • April and August 24-Month Studies • Future Shortage Declarations 6

CAP Priority System • CAP Water Has Different Priorities • Established Over 35 Years Ago • Provides Certainty for Delivery of CAP Water • Basis For Municipal Investments 7

Glendale’s CAP Water • On River Priority- 11% High • Municipal Priority- 79% • Non-Indian Ag Priority- 10% • Ag Pool- 0% • Excess- 0% Low 8

DCP Summary • Over Next Six Years • Slow Water Level Declines • Increased Number of Shortage Tiers and Water Given up by Arizona • Shortage Sharing with California 9

DCP Impacts to Arizona • Cuts to Lower Priority CAP Water • Lower Priority CAP Water Mitigation • Pinal Agricultural • NIA • M&I Supply Will be Cut Only in the Deeper Tiers 10

Impacts to Glendale • No Deep Cuts to our CAP Supply • Possible Small Impact After First Three Years • NIA Supply • M&I Loss covered by the Arizona Water Banking Authority 11

Plan for Future CAP Water Reductions Shortages and Emergencies • Improve Redundant and Emergency Supplies o Long-Term Storage Credits o Groundwater Wells o Interconnections o Conservation o New Sources of Supply o Creative Exchanges of Water 12

DCP Status Update • Legislation passed on 1/31/19 for AZ DCP • All Seven Basin States Have Agreed to the DCP Terms • Federal Congressional Approval • POTUS Signature • All Basin States Will Sign DCP Agreements • DCP in Place Before the August 24-Month Study 13

Bottom Line for Glendale • Well Prepared for Water Supply Reduction • Messaging for Drought / Shortage • Lake Mead Protection • Shortage Sharing • Increased CAP Water Cost 14