INDEPENDENT SPECIAL DISTRICTS OF ORANGE ......2020/07/23 · 2+ million visitors a year 9 Pump...
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July 23, 2020 INDEPENDENT SPECIAL DISTRICTS OF ORANGE COUNTY
Transcript of INDEPENDENT SPECIAL DISTRICTS OF ORANGE ......2020/07/23 · 2+ million visitors a year 9 Pump...
July 23, 2020
INDEPENDENT SPECIAL DISTRICTS OF ORANGE COUNTY
Presenter
Presentation Notes
Rick
HISTORY1932: Water service to Three Arch Bay and Capistrano-by-the-Sea. 1976: South Coast Water District and South Laguna Sanitary District consolidated. 1999: Dana Point Sanitary District and Capistrano Beach Water District consolidated into South
Coast Water District. Agreement with City of Laguna Beach to serve South Laguna.2000: Operate the Joint Regional Water Supply System bringing water from MWD’s Diemer Plant
into South Orange County via 30+ miles of large diameter transmission pipelines and 60 Million Gallons of storage, serving over 200,000 residents.
DISTRICT FACTSWater Wastewater
8.3 square-mile area 12.1K Water Accounts 17.8K Sewer Accounts40,000 residents & 1,000 businesses 147 Miles of Pipeline 140 Miles of Sewer Mains 2+ million visitors a year 9 Pump Stations 13 Lift StationsDemand: 5,500 AF per Year 13 Reservoirs 2-mile Sewer TunnelAnnual Revenue: $36,000,000 Groundwater Recovery Facility
Recycled Water AWT &R.O. Polishing Facility 2
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GM Pride
• Investment in CIP and Maintenance Program:• 2 to 4% Water Loss• Low Inflow & Infiltration• 65% of sewer mains video inspected annually• SCWD recycles 70% of sewage that flows to the Coastal
Treatment Plant, with plans to expand to 100%• Over 95% “Excellent” Customer Service Rating year-
after-year• Diversified Funding Sources for CIP
• SRF Loan, PAYGO, & Bond Financing• Groundwater Recovery Facility – 10-15% of water
portfolio• Live Stream & Archived Board/Comm Meetings, since
20084
South Coast Water District Operates the Joint Regional Water Supply System
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Member Agencies• California State Parks• Camp Pendleton• City of San Clemente• City of San Juan Capistrano• El Toro Water District• Irvine Ranch Water District• Moulton Niguel Water District• South Coast Water District• Southern California Edison
Presenter
Presentation Notes
SCWD also operates the Joint Regional Water Supply System or JRWSS Since 2000, the District has operated and maintained, planned, and implemented the capital improvement program for the JRWSS, which distributes imported drinking water from Metropolitan throughout South Orange County. The JRWSS is jointly owned by and provides water to the District, Irvine Ranch Water District (IRWD), El Toro Water District (ETWD), MNWD, the City of San Juan Capistrano, the City of San Clemente and three agencies of the San Diego County Water Authority (SDCWA): San Onofre Nuclear Generating Station, Camp Pendleton, and San Onofre State Park. The system includes 30 miles of transmission mains and two reservoirs in San Clemente, which hold a total of 60 million gallons of water.
TUNNEL STABILIZATION & PIPELINE REPLACEMENT PROJECT
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• 1954: Blasted and hand-dug within the South Laguna bluffs• Two miles from Three Arch Bay to Aliso Beach• Gravity sewer line operating without lift stations• 1974: Original pipeline replaced• Flow: 1 Million Gallons of Sewage per Day• ~$100 Million, Multi-Year Repair Project• Fund Source: SRF Loan • Construction: Ongoing
AlisoBeach
ThreeArch Bay PROJECT LOCATION
Current Tunnel Conditions
7Decaying support beams
Decaying support beams
‘Rendering’ of Rehabilitation
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Doheny Ocean Desalination Project
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• Phase 1 Up to five million gallons per day potable water • Facility would receive approximately 10 MGD ocean water
to produce five MGD• Ultimate capacity is 15 mgd
Project Goals
• Provide a high quality, locally controlled and drought-proof water supply while protecting the environment
• Further diversify the District’s water supply portfolio to reduce dependence on imported water supplies
• Provide emergency backup water supplies, should an earthquake, system shutdown, or other event disrupt the delivery of imported water to South Orange County
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Presenter
Presentation Notes
Rick Options of either 5 MGD or 2 MGD Components: Subsurface intake, slant well technology Comingled brine discharge consistent with Ocean Plan Amendment Optimizations with existing SCWD property and connection to existing conveyance infrastructure
SCWD Water Reliability Portfolio Approach
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RECYCLED WATER: 11%
WATER USE EFFICIENCY: 20%
GROUNDWATER RECOVERY: 9%
MWD IMPORTED WATER:
60%
SCWD TOTAL WATER SUPPLIES
WATER USE EFFICIENCY
GROUNDWATER RECOVERY
RECYCLED WATER
STORMWATER CAPTURE
Presenter
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Rick Top Priority – Water Use Efficiency and Recycled Water Water Use Efficiency Achieved over 30% water conservation during last drought “Daily Per Capita Potable Water Demand” is 141 gallons per capita per day State target 150 gpcd in 2020 Includes water use from 2 million visitors 2 to 4% water system loss is among best in State Automated Meter Reading (AMR) fully implemented and utilized to minimize Customer Water Leaks Recycled Water SCWD Advanced Water Treatment Facilities at Coastal Wastewater Treatment Plant (CTP) 70% Utilization of SCWD CTP Sewage Influent TODAY Capital Improvement Plans to Maximize Recycled Water to 100% Utilization of SCWD CTP Sewage Influent Extensive Recycled Water Distribution and Retrofit Program Groundwater Recovery Facility (RO Plant) SCWD owns and operates a Groundwater Recovery Plant and a Groundwater Well 700 to 900 AFY, during Normal Rainfall Years Only operational during Average (and Higher) Rainfall Years Stormwater Capture SCWD a 20% Partner in Phase 1 of the San Juan Watershed Project Santa Margarita Water District is the Lead Agency Rubber Dam Technology Additional 140 AFY of Drinking Water Supplies
SCWD Current Drinking Water Supplies
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GROUNDWATER RECOVERY 12.5%
MWD IMPORTED WATER 87.5%
Presenter
Presentation Notes
Rick Historically, SCWD is 85 to 100% dependent on MWD for our Drinking Water Supplies
Local Seismic Risks to Our Water Reliability
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Presenter
Presentation Notes
MWDOC 2018 OC Reliability Study & 2013 South Orange County Reliability Study Update Significant emergency water needed in South Orange County Minimum 60-day water supply needed SCWD Water Reliability Study & Working Group Community Working Group reviewed and vetted Study Of the water supply options evaluated, Doheny Ocean Desalination Project ranked highest for SCWD service area SCWD has roughly 11 days of emergency supplies and needs at least 49 additional days of emergency supplies Doheny Ocean Desalination Project would provide a continuous supply, well over 60 days MWDOC Water Reliability South Orange County is 90% dependent on imported water for drinking water supplies and is short of emergency supplies today by 20 to 27.5 MGD Largest risk exposure – Earthquake that could disrupt State Water Project flows for more than 1 year $1.7 billion (2004 dollars) potential economic loss in South Orange County from 80% outage for 60 days San Juan Watershed Project and the Doheny provide annual supplies and emergency supplies Must be prepared for a minimum 60-day water outage
Project History
2003Feasibility
Study
2004-2007Slant Test Well
Pilot Study
2008-2013Phase 3 Extended Pumping & Pilot
Plant Test
2004-2005Hydrogeology
Studies
2007Engineering
Feasibility Report
2019EIR
Certification
2014-2016MWD Foundational
Actions Funding Program
2018$10 Million
Prop 1 Grant Funding
2020Due Diligence Studies
2020USEPA WIFIA Funding
Shortlist
Presenter
Presentation Notes
Mark - Partners got involved in 2008 - Transitioned from MWDOC to SCWD in 2015 - Right-sized for our District but options are open for scaling
Planned Project Facilities
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Presenter
Presentation Notes
Slant Wells 5 mgd facility would require up to 4 wells, and likely 2 pods Slant Well pods for the 5 mgd facility could be located in any of the proposed locations Raw Water Pipeline Delivers ocean water to the desalination facility Preferred alignment is the South Alignment Explain trenchless areas Mention HDPE pipe, suitable material of construction for seawater, but also great for emergency preparedness in terms of resiliency during an earthquake Located in existing streets or developed areas Various alternative pipeline alignments studied North Alignment would follow Dana Point Harbor Drive and Del Obispo Street South Alignment would be west of Coast Highway and along Doheny Park Road and Las Vegas Street
Project Status – Completed Milestones
Complete• Environmental Impact
Report Certification –5 MGD
• Delivery Method Selection (Design-Build-Operate-Maintain)
• Legislative Fix AB 1752
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Presenter
Presentation Notes
Rick
Project Status: Milestones In-Progress
In Progress• Permitting • Cost Analysis Study
• Anticipate results will be presented in in August 2020
• Slant Well Hydrogeologic Review• U.S. Geological Survey
• Alternative Power Supply Study• Hybrid Project Concept Study
• Using District’s Groundwater Recovery Facility
• Ocean Water Augmentation Study –Combined Ocean Desal & Direct Potable Reuse
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Presenter
Presentation Notes
Rick
Partnering for Viable Water Reliability
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Broad-Based Support
Elected Official Support
Regulatory Support
CommunitySupport
StakeholderSupport
Presenter
Presentation Notes
Rick
January 2020 2025/26
Spring/Summer 2021Env. Permitting
DBOM Contract Dev. & Award
Design/Build
January2021
January2022
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High Level Project Timeline
Financial Study Scheduled for August 19, 2020
Doheny DesalPlant On-line
Local Potable Water System Integration
Solicit Partners
Due Diligence Studies
Doheny Ocean Desalination - Customer Survey
• SCWD conducted a customer survey • During pandemic & recession
• Results included:• 74% favor the Project after
Description• 80% favor Project after
Education• 72% favor Project after Critical
Statements
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Customer Survey – Willingness to Pay
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