Wate r Supply Plan August 21, 2014 1 Statutory Requirement for - - PowerPoint PPT Presentation

CAGRD Plan of Ope r ation

Wate r Supply Plan

August 21, 2014

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Statutory Requirement for Water Supply Plan

A.R.S. § 45-576.02.C.2 (c) - CAGRD Water Supply Plan:

A description of the water resources that CAGRD plans to use for replenishment during the 20 years following submission of the Plan; and the water resources potentially available to the CAGRD for replenishment during the subsequent 80 years.

A.R.S. § 45-576.03.N.1 – ADWR Review of Plan:

The Director shall determine whether CAGRD has identified sufficient water supplies to meet it replenishment obligations for current members during the 20 years following submission of the Plan; and has identified additional water supplies potentially available to meet the replenishment obligation for the 100 years following submission of the Plan for current members and potential members.

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Policies Governing Water Supply Program

• No condemnation authority.
• Negotiate directly with on-river irrigation districts.
• Fiduciary duty to CAGRD members requires negotiating fair and reasonable prices for

supplies.

• Consider potential 3rd party impacts associated with any proposed water

acquisition/transfer.

• Timing of new supply acquisitions matched to obligations.
• Balance of approximately 50% short-term/50% long-term.
• Supply diversity.
• Not a water provider, therefore can utilize supplies that might be less attractive to

municipal providers.

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10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 90,000

Obligation by Current Versus Potential Members

(acre-feet)

Potential Members Current Members Projected ► ◄ Actual

62,800 24,100

Supplies Planned for Use: 2015-2034 Current CAGRD Portfolio

Supply Class Annual Volume (AF/YR, 100 years) Year Available Term CAP M&I 7,996 2011 Permanent CAP Tribal (WMAT) 2,500 2016 100 year lease CAP NIA 18,185 2016 Permanent Long-term Credits 5,452 2014-2114 100 year Effluent 2,400 2017 100 year lease Total

36,533

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Summary of Water Supplies CAGRD Plans to Use, 2015 – 2034 and Supplies Potentially Available for Use, 2035 – 2114

Supply Category Supply Location Total Current Supply (AF/yr, 100 yrs) Supplies CAGRD Plans to Use – Next 20 Years Supplies Potentially Available to CAGRD – Subsequent 80 Years Low (AF/yr, 100 yrs) High (AF/yr, 100 yrs) Low (AF/yr, 100 yrs) High (AF/yr, 100 yrs) Long-Term Storage Credits Phoenix AMA, Pinal AMA, Tucson AMA, Harquahala INA 88,900 11,000 22,000 11,000 22,000 Effluent Phoenix AMA, Pinal AMA, Tucson AMA 407,600 59,600 119,200 76,100 152,300 Central Arizona Project All Contracts, Subcontracts, and Unallocated Supplies 1,415,000 279,700 559,300 207,700 415,500 Colorado River Arizona Entitlements Excluding CAP Supplies 1,143,700 109,800 219,700 109,800 219,700 Imported Groundwater Harquahala, Butler, McMullen Valleys 269,000 119,600 239,100 Arizona Desalination Yuma-area, Phoenix AMA 40,000 14,000 40,000 Total 3,364,200 460,100 920,200 538,200 1,088,600

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Long-Term Storage Credits

• Total Current Supply: 88,900 AF/YR

– Total existing Phoenix, Pinal, Tucson, Harquahala LTSCs

• Plan to Use (20 Yrs): 11,000 – 22,000 AF/YR

– LTSCs not owned by CAWCD, CAGRD, AWBA and not pledged to a DAWS; low estimate assumes 50% success rate

• Potentially Available (80 Yrs): 11,000 – 22,000 AF/YR

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Effluent

• Total Current Supply: 407,600 AF/YR

– Total Phoenix, Pinal and Tucson AMA current annual production

• Plan to Use (20 Yrs): 59,600 – 119,200 AF/YR

– All currently discharged/unused effluent; low estimate assumes 50 % success rate

• Potentially Available (80 Yrs): 76,100 – 152,300 AF/YR

– All currently discharged/unused effluent, escalated over the next 20 years based on the State’s population growth projections. – Low estimate assumes 50% success rate

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Central Arizona Project

• Total Current Supply: 1,415,000 AF/YR

– All CAP subcontract and unallocated volumes

• Plan to Use (20 Yrs): 279,000 – 559,300 AF/YR

– All subcontract water not ordered plus all short-term tribal lease water plus all tribal water delivered to recharge facilities; Low estimate assumes 50% success rate

• Potentially Available (80 Yrs): 207,000 – 415,500

AF/YR

– 20 year volume reduced for assumed increased on- reservation use. Tribal allocations reduced by 50%.

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Colorado River

• Total Current Supply: 1,143,700 AF/YR
• Plan to Use (20 Yrs): 109,800 – 219,700 AF/YR

– 20% of average annual on-river agricultural consumptive use; Low estimate assumes 50% success rate

• Potentially Available (80 Yrs): 109,800 – 219,700 AF/YR

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Imported Groundwater

• Total Current Supply: 269,000 AF/YR
• Plan to Use (20 Yrs): 0 AF/YR
• Potentially Available (80 Yrs): 119,600 – 239,100 AF/YR

– 36 KAF McMullen Valley – 65 KAF Butler Valley – 138 KAF Harquahala Valley – Low estimate assumes 50% success rate

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Arizona Desalination

• Total Current Supply: 0 AF/YR
• Plan to Use (20 Yrs): 0 AF/YR
• Potentially Available (80 Yrs): 14,000 – 40,000 AF/YR

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SUMMARY

• Projected 2034 obligation: 86,900 AF/YR
• Existing portfolio 36,500 AF/YR will be used to meet obligation
• Additional new supplies needed: 50,400 AF/YR
• New supply acquisitions per CAGRD Acquisition Program

Strategy

• Water Supply Inventory describes supply types and range of

potentially available supplies for 20 and 80 year period

• 20 year supply – Credits, Effluent, CAP Water, Colorado River

Water

• 80 year supply – includes all supplies in 20 year plus lower

priority supplies: Imported Groundwater, Arizona Desalination

• CAGRD demand represent small fraction of available supply

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Que stions?

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