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MWDOC Joint Board Workshop June 5, 2019
Supplies Demands
2018: Balanced Supplies and Demands 2019: Prepared for a Range
- f Future Conditions
Meeting Member Agency Demands 1 6/4/2019 Adheres to the - - PDF document
Meeting Member Agency Demands 1 6/4/2019 Adheres to the - - PDF document
6/4/2019 Item No. 3 MWDOC Joint Board Workshop June 5, 2019 2018 : Balanced Supplies 2019 : Prepared for a Range and Demands of Future Conditions Maintained high endofyear SWP Water Demands Allocation Balance storage reserves
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Early 2018: High Deliveries of SWP Supplies (~75% Blends) April‐May 2018: Minimized Deliveries of SWP Supplies (~0% Blends)
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June‐December 2018: Moderate Deliveries
- f SWP Supplies (~25‐35% Blends)
1.1 1.1 1.4 1.5 1.4 1.8 2.2 1.8 1.1 1.0 1.7 2.4 2.7 2.3 1.2 0.9 1.3 2.5 2.5
1 2 3 4 5
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Million Acre‐Feet
Emergency Storage Dry‐Year Storage
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Operating Principles
Meet member agency demands Meet water quality requirements Manage storage according to WSDM principles Manage maintenance and shutdowns Meet blending objectives Maximize hydroelectric power production
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0.0 0.5 1.0 1.5 2.0 2.5 3.0 10% 20% 30% 40% 50% 60% 70% 80% Million Acre‐Feet State Water Project Allocation Colorado River Supplies State Water Project Supplies
*Does not include transfers or other WSDM actions; agricultural adjustments also not included Low Demands Normal Demands High Demands
Conditions Under Normal Hydrology Current Trend Conditions
Provide guidelines to prioritize the use of storage in shortage conditions and the replenishment of storage in surplus conditions
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Priority is not meant to be a strict order Store water for most effective use in future droughts Priority can be adapted to current conditions
Priority Surplus Action (Fill) 1 DVL 2 Flex Storage 3 Conjunctive Use / Cyclic Storage 4 SWP Carryover 5 Lake Mead ICS 6 Banking Programs Surface Groundwater Surface Groundwater In‐Region Out‐of‐Region
WSDM Plan – Surplus Action Priorities
May Vary
Priority is not meant to be a strict order Take water strategically to be better prepared for future droughts Priority can be adapted to current conditions
Priority Drought Action (Withdraw) 1 DVL 2 Banking Programs 3 Lake Mead ICS 4 SWP Carryover 5 Conjunctive Use / Cyclic Storage 6 Flex Storage Groundwater Surface Groundwater Surface Out‐of‐Region In‐Region
WSDM Plan – Drought Action Priorities
May Vary
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Surplus Conditions
100 200 300 400 500 600 700 800 900 1,000 Storage Fill (Thousand Acre‐Feet) Lake Mead ICS Banking Programs CUP/Cyclic Lake Mead ICS DVL
General Guideline General Guideline
Fill according to the max put capacity Fill according to max put capacity Additional put in Lake Mead ICS Fill the remaining capacity in DVL Initial put in Lake Mead ICS
Shortage Conditions
‐1,400 ‐1,200 ‐1,000 ‐800 ‐600 ‐400 ‐200 Storage Fill (Thousand Acre‐Feet) Lake Mead ICS Banking CUP DVL
General Guideline General Guideline
Max take capacity Create space in reservoir for additional
- perational flexibility
Preserve for last, meeting remaining system demands SWP Carryover SWP Carryover DVL Flex Storage Initial amount Available take capacity Amount needed to meet demands in areas that can only receive water from SWP Down to one‐third of dry‐year capacity Go to 8‐pump flow on CRA & drought actions Remaining amount above emergency storage DVL
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‐1,000 ‐500 500 1,000 1,500 0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% Thousand Acre‐Feet State Water Project Allocation
Storage Withdraw
2019 WSDM Strategy Implementation
Storage Fill Storage Fill Storage Withdraw Storage Withdraw Storage Fill Storage Fill
‐1,000 ‐500 500 1,000 1,500 0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% Thousand Acre‐Feet State Water Project Allocation ‐1,000 ‐500 500 1,000 1,500 0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% Thousand Acre‐Feet State Water Project Allocation
Lake Mead ICS Lake Mead ICS Banking Programs DVL CUP/Cyclic Additional Actions CUP Banking Programs SWP Carryover Lake Mead ICS DVL DVL SWP Carryover
Conditions Under 15% SWP Allocation
Managing the System
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Emergency deliveries of agency water in Metropolitan’s system should be considered in a proactive and measured way, rather than ad‐hoc after a significant natural disaster or emergency
Providing options after a significant emergency
Infrastructure Reliability
Rehabilitation of prestressed concrete cylinder pipe Seismic upgrades of treatment plants and conveyance systems
Emergency Response
In‐house manufacturing and construction capability Emergency communications Mutual assistance agreements with partners
Addressing seismic vulnerabilities and system resiliency
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Utilize flexibility in Metropolitan’s system to deliver water from multiple supply sources, feeders and/or reservoirs Utilize interconnections
- r operating
agreements with other agencies
Agencies may benefit from a proactive approach for utilizing Metropolitan’s system during emergencies Approach would only be used if there is no other way to deliver water to a portion of the agency service area Approach would not substitute for local agencies to take steps to improve emergency preparedness
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An area within Metropolitan’s system is out of service for a prolonged period after an earthquake There are no other delivery options for part of the impacted area Metropolitan’s system could be used to supply a portion of the local system that has no other delivery options, subject to specific conditions, until
repairs are complete
MWD Water Treatment Plant
Agency A Agency A
Normal Operations
Agency A Water Supply = Service Connection
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MWD Water Treatment Plant
Agency A Agency A Damage Zone
Agency A fed with water thru MWD system
Emergency Operations
Agency A Water Supply = Service Connection = Service Connection Agency A Agency A Agency B
Normal Operations
MWD Water Treatment Plant Agency A Water Supply
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MWD Water Treatment Plant = Service Connection Agency A Agency A Agency B
Emergency Operations
Damage Zone
Agencies A and B fed with Agency A’s water thru MWD system Agencies A and B fed with Agency A’s water thru MWD system Agency A Water Supply
Provide member agencies with the option of using Metropolitan’s system for agency water deliveries in an emergency, under specific conditions Board and member agency feedback is essential for policy development “Emergency” definition
Metropolitan is physically unable to make deliveries to a member agency service connection for a specified period after an emergency, as determined by Metropolitan’s General Manager
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Use of Metropolitan’s system for emergency deliveries Ability to serve Water quality standards and liability Indemnification System integrity Compensation Operational requirements Term for emergency deliveries
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