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

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

Jul 05, 2023 24 likes •164 views

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

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SLIDE 1

Drought Contingency Plan (DCP)

City Council Workshop April 23, 2019

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SLIDE 2

Glendale Water Sources

44% 44%

6% 6%

Salt River Project (SRP) Central Arizona Project (CAP) Groundwater Effluent 2018 Use = 45,868 acre-feet

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SLIDE 3

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

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SLIDE 4

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

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SLIDE 5

Lake Mead Conditions

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9.0 MAF Annual (Inflows) 10.2 MAF Diversions & Evaporation (Outflows) Dead Pool 1,075 Foot Elevation 1,050 Foot Elevation 1,025 Foot Elevation

100,000 Acre-Feet Loss of Water = One Foot Drop in Water Level

1.2 MAF/ Year Deficit 12 Feet / Year of Water Level Drop = _

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SLIDE 6

Lake Mead – End of 2019

  • Most probable Lake Mead water level

elevation on December 31, 2019

  • April and August 24-Month Studies
  • Future Shortage Declarations

Bureau of Reclamation - Predictive Colorado River System Modeling:

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SLIDE 7

CAP Priority System

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  • CAP Water Has Different Priorities
  • Established Over 35 Years Ago
  • Provides Certainty for Delivery of CAP Water
  • Basis For Municipal Investments
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SLIDE 8

Glendale’s CAP Water

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High Low

  • On River Priority- 11%
  • Municipal Priority- 79%
  • Non-Indian Ag Priority- 10%
  • Ag Pool- 0%
  • Excess- 0%
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SLIDE 9

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

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SLIDE 10

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

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SLIDE 11

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

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SLIDE 12

Plan for Future CAP Water Reductions

Shortages and Emergencies

  • Improve Redundant and Emergency Supplies
  • Long-Term Storage Credits
  • Groundwater Wells
  • Interconnections
  • Conservation
  • New Sources of Supply
  • Creative Exchanges of Water

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SLIDE 13

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

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SLIDE 14

Bottom Line for Glendale

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

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