Part 1 Operations, Facilities & Costs January 28 -- February 4, 2003 Meeting Purpose & Agenda • Meeting Purpose – Review and discuss a potential.
Download ReportTranscript Part 1 Operations, Facilities & Costs January 28 -- February 4, 2003 Meeting Purpose & Agenda • Meeting Purpose – Review and discuss a potential.
Part 1 Operations, Facilities & Costs January 28 -- February 4, 2003 Meeting Purpose & Agenda • Meeting Purpose – Review and discuss a potential CALFED Los Vaqueros Reservoir expansion project -- the facilities required and how it would operate • Agenda – 2003 Studies: Information and Schedule – Current Delta Operations – Los Vaqueros Reservoir Expansion Operations • CCWD and Bay Area Water Quality and Reliability • Delta Enhancement – Facilities, Construction Schedule, and Costs 2 Meeting Guidelines • Ensure Everyone's Participation – One speaker at a time – Minimize side conversations • Honor Our Time Limits – Keep comments concise and avoid redundancy – Use ditto to agree with others • Commit to Being Fully Present – No cell phones, pagers, voicemail, etc. – Ask for what you need from the meeting process • Respect Each Other – Listen carefully to other participants and try other opinions on for size – Respond to ideas and issues, not individuals • Identify Yourself – State your name and organization or community 3 2003 Study Activities •Extensive public outreach Where we are now…. –Now through June 2003 •Provide facts & information •Key dates –CCWD Board decision -- July 2003 –Potential vote -- November 2003 4 Public Workshops • Today’s Discussion – Potential Project -- How would an expanded reservoir operate, what facilities are needed, and what would they cost? • Future Workshops – Part 2 -- Partners, Benefits & Payments – benefits to CCWD, CALFED, and Bay Area water agencies; potential organizational structure and agreements among partners – Part 3 -- Environmental Effects & Mitigation – Impacts and strategies for addressing potential adverse effects – Part 4 -- Review of CCWD Principles and responses to comments 5 Information Available Now OPERATIONS Delta Water System - How the Delta water system works and how an expanded reservoir would operate with other partners Potential Partners - List of potential partners, their needs, and the benefits an expanded reservoir could provide them Water Rights - Description of water rights changes needed Water Quality - Benefits for CCWD and other Bay Area water agencies Reliability - Benefits for CCWD and other Bay Area water agencies Delta Environment - Environmental benefits for the Delta FACILITIES & COSTS Delta Intakes - Size of facilities, possible facility layouts for fish screens, and pumping capacity Pipelines - Capacity, corridors, and length Dam - Size, location, safety features, construction schedule, reservoir inundation area, and interim water supply plan Cost Estimates - Planning level construction and operation & maintenance costs CCWD Principles for Participation • The project improves water quality and reliability for CCWD • The project enhances the Delta environment • The project protects and enhances the fisheries and terrestrial species benefits provided by the existing Los Vaqueros Project • The project preserves and increases the recreational opportunities of the Los Vaqueros Project • CCWD must maintain control of watershed and operation of the reservoir • The project protects and reimburses the financial investment made by the CCWD customers who financed the existing $450 million Los Vaqueros Project • The proposal would be placed before the voters of the Contra Costa 7 Water District Project Overview • CALFED is studying whether an expanded Los Vaqueros Reservoir can meet CALFED and Bay Area water agencies’ objectives • Water Quality • Reliability • Environmental Enhancement • Expansion from 100,000 acre-feet up to 500,000 acre-feet maximum capacity 8 What are Important Water Quality Parameters? • Salts – From seawater intrusion or other discharges -- Cause taste and corrosion problems; impede water recycling • Organics and Bromide – Harmful chemical by-products can be formed when water is disinfected • Pathogens (bacteria or viruses) – From runoff, discharges, or human activities -- Treated with filters and disinfection 9 What is Reliability? • Emergency Storage – Storing water to protect against a disaster (earthquake, power failure, levee failure, pipeline failure, or chemical spill) • Drought Storage – Storing water in wet years for use during dry years • Flexibility – Ability to stop Delta diversions to protect fish without disrupting water users 10 Environmental Water Improves Fisheries & Habitat • Environmental Water Account (EWA) – Integral part of CALFED Program to restore the Delta – Like a bank account: Assets controlled by fisheries agencies to enhance Delta fisheries and habitat • Protecting fish by shutting off pumps (changing the timing of diversions) • Providing flows to enhance fisheries • Assets can include water, storage, conveyance capacity, and operational flexibility • Federal Wildlife Refuges – Water supply to 10 wildlife refuges in the San Joaquin Valley • In-stream Flows – Water supply to provide stream flows for fish at critical times 11 Bay Area Water Agencies 12 Delta Water Diversion Facilities 13 Bay Area Water Use Delta System 35.6 MAF/yr Bay Area 0.8 MAF/yr EBMUD SFPUC Outflow Bay Area Upstream Users SCVWD SWP Exports CCWD ACWD Zone 7 CVP Exports In-Delta Users Potential Partners 14 Bay Area Water Agencies Use a Small Piece of the Delta Water System Existing Los Vaqueros Project • Provides Emergency Storage – Protects against a catastrophe in the Delta • Improves Water Quality – Changes the timing and location of diversions – Stores water for blending when Delta water quality is poor • Enhances Delta Environment – State-of-the-art fish screens – Flexible timing and location of diversion 15 Existing Los Vaqueros Project Contra Costa Canal Rock Slough Intake Facility CCWD Service Area Los Vaqueros Reservoir & Watershed Old River Intake Facility 16 Existing Los Vaqueros Project Typical annual Los Vaqueros operation Reservoir Level (thousand acre-feet) Reservoir level depends on year type (dry, wet) 100 80 a 60 a 40 Reserved for Emergency 20 0 January HIGH Delta Water Quality Action at Reservoir Delivered Water Quality July FILL CHANGE STOP FILL / RELEASE FOR FISH December LOW FILL HOLD RELEASE CHANGE HOLD HIGH 17 Existing Los Vaqueros Project Storage in Los Vaqueros Reservoir Los Vaqueros Reservoir storage lowered lowered chlorides delivered to CCWD customersin 1999 chlorides delivered to CCWD customer 300 Without Blending from Los Vaqueros Chlorides, mg/L 250 200 150 100 50 0 7/1 1999 8/1 9/1 10/2 Date Rock Slough Delivered 11/2 With Blending from Los Vaqueros 18 Existing Los Vaqueros Project Fisheries agencies concluded that the Los Vaqueros Project improved the Delta environment for current and future CCWD diversions 2002 Fish Monitoring at CCWD Old River Intake Species Number entrained Winter run chinook salmon 0 Spring run chinook salmon 0 Steelhead 0 Delta smelt 0 Splittail 0 Other 775 Source: CA Dept. of Fish and Game 19 Questions and Discussion • Workshop Process and Public Review • Project Purposes and CALFED Goals • Improve Bay Area water quality and reliability • Enhance Delta environment • Current Operations – Delta Operations • Water Quality • Reliability • Delta Enhancement – Existing Los Vaqueros Project 20 Meeting Agenda • Agenda – 2003 Studies Activities and Available Information – Current Delta Operations – Los Vaqueros Expansion Operations • Operating Scenarios • CCWD and Bay Area Water Quality and Reliability • Delta Enhancement – Facilities, Construction Schedule, and Costs 21 Operating Scenarios • Developed full range of possible ways to operate an expanded reservoir – Environmental water priority – Bay Area reliability priority – Multi-purpose (combination) • Compared to future conditions without an expansion • Determined there are projects that could meet CALFED objectives and CCWD Principles 22 Operating Scenarios Constraints • Delta Protection – Operate within all regulatory requirements – Use only surplus flow and existing water rights / contracts to fill reservoir • Fishery Protection: conservative – Assumed two month “no-fill” period in spring for fish protection – Operate within all fish protections measures • Protection for Other Users – No injury to water right holders or contractors • Analyzed 70 years of rainfall patterns – Including critically dry (1977) and extended drought (192823 1934 and 1987-1992) years Opportunities to Fill an Expanded Reservoir Typical Delta Water Quality Seasonal Variation Best Water Quality - Best Time to Fill Reservoir 500 400 300 200 100 Sep Aug Jul Jun May Apr Mar Feb Jan Dec Nov 0 Oct Total Dissolved Solids (ppm) Possible pumping restrictions to protect fish Months 24 Operating Scenarios Single-Purpose Scenarios Environmental Reliability – EWA Program uses reservoir capacity to deliver SBA water – EWA Program uses flexibility to shut down export pumps to protect fish – Reservoir stores water for use in dry years by SBA agencies ENV. WATER ENV. WATER DROUGHT STORAGE & WQ & WQ & WQ CCWD WQ CCWD WQ CCWD WQ CCWD WQ CCWD ES CCWD CCWD ES ES CCWD CCWD ES ES CCWD CCWD ES ES Future w/o Expansion 25 Operating Scenarios Multi-purpose Scenarios Federal Benefits Drought Storage & Environmental Water ENV. WATER – Reservoir stores water & WQ for use in dry years by SBA agencies – EWA Program uses DROUGHT reservoir capacity to STORAGE deliver SBA water – EWA Program uses flexibility to shut down CCWD export pumps to protect WQ fish CCWD ES ENV. WATER ENV. WATER & WQ & WQ CCWD DROUGHT STORAGE DROUGHT STORAGE DROUGHT STORAGE CCWD WQ CCWD WQ CCWD ES CCWD ES – Federal agency uses reservoir capacity to deliver SBA water – Federal agency uses flexibility to • shut down export pumps to protect fish • provide water supplies for wildlife refuges 26 Drinking Water Quality Benefits • Major Findings – Water Quality • All scenarios would improve drinking water quality for CCWD • All scenarios would improve drinking water quality for Bay Area agencies served by the South Bay Aqueduct 27 Drinking Water Quality Benefits • As the state continues to grow there will be increased pressure on the Delta and declining water quality • Expanded Los Vaqueros Reservoir would improve water quality for CCWD and Bay Area water agencies – New intakes would reduce salts and bromide – Larger intakes allow faster reservoir filling when quality is better – Deeper reservoir with multiple intakes reduces organics • These improvements result in – Reduced public health risks – Improved taste – customer satisfaction – Reduced treatment costs and improved ability to meet existing 28 and future water quality regulations Drinking Water Quality Benefits for CCWD More high quality water delivered to CCWD customers during extended droughts • Before the existing reservoir, CCWD could not provide high quality water during droughts or in any dry periods – No water available for blending • With the existing reservoir, CCWD can deliver high quality water through a 3-year drought • With an expansion, CCWD could deliver high quality water through a 6-year drought 29 Drinking Water Quality Benefits for CCWD CCWD can improve water quality delivered to customers with an expansion Future Conditions without an Expansion Water Quality Benefits to CCWD as Delivered Chlorides (ppm) 250 225 200 175 Without Expansion 150 125 100 75 50 25 0 0% 10% Wet 20% 30% 40% 50% Normal 60% 70% Dry 80% 90% 30 100% Extended Dry Drinking Water Quality Benefits for CCWD CCWD can improve water quality delivered to customers with an expansion Future Conditions w ith an Expanded Reservoir Water Quality Benefits to CCWD as Delivered Chlorides (ppm) 250 Water Quality Improvement for CCWD 225 200 175 150 Without Expansion 125 100 75 50 With Expansion 25 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 31 Wet Normal Dry Extended Dry Benefits to Potential Partners Water Quality 30% • An expanded reservoir could reduce the times that South Bay Aqueduct agencies taste salts in the water • An expanded reservoir would reduce the maximum day salt levels Percent of time delivered water would exceed 100 ppm Chlorides 25% 20% Future with an Expansion 15% 10% 5% 25% Future without an Expansion 0% 5% 100 ppm Chlorides – Now: 250 ppm – With expansion: 150 ppm 32 Night Day Night Day Night Day Night Day Raw Water Temperature Raw Water pH – Los Vaqueros would be deeper pool than Clifton Court Source: ACWD • Reduced temperature variation • Reduced algae blooms • Reduced pH variation – Improved quality of deliveries to treatment plants means: • Improved treatment stability • Decreased cost pH 13:22:00 7:32:00 1:42:00 6 19:52:00 66 14:02:00 6.5 8:12:00 68 2:22:00 7 20:32:00 70 14:42:00 7.5 8:52:00 72 3:02:00 8 21:12:00 74 15:22:00 8.5 9:32:00 76 3:42:00 9 21:52:00 78 16:02:00 An expanded Los Vaqueros Reservoir would reduce variation in deliveries to treatment plants °F Reduced Daily Variability for Potential Partners 33 Reliability Benefits • Major Findings – An expanded Los Vaqueros Reservoir could be operated to provide more reliable water supplies • 60,000 to 120,000 acre-feet of water in drought years for CCWD (as alternative to current drought year plans) • 110,000 to 300,000 acre-feet of water to South Bay Aqueduct agencies in drought years 34 Reliability Benefits for CCWD How water needs are met in normal and dry years Future Need Conservation Conservation Conservation Purchases Other Voluntary Conservation Spot Purchases & Drought Mgmt Purchases Voluntary Conservation Other Purchases (e.g. Recycling) (e.g. Recycling) Other Other (GW) Future Demand Expanded Los Vaqueros could reduce the need for spot purchases and rationing in dry periods (with higher quality) (e.g. Recycling) CVP Contract (Federal) CVP Contract (Federal) Normal Year Single Dry Year CVP Contract (Federal) Multi-Year Drought 35 Reliability Benefits for Potential Partners How water needs are met in normal and dry years Future Need Conservation Conservation Conservation Local Storage Voluntary Conservation Spot Purchases & Drought Mgmt Non-local Storage Voluntary Conservation Other (e.g. Recycling) Local Storage Other (e.g. Recycling) Local Storage Future Demand Expanded Los Vaqueros could provide this water (with higher quality) Other Contract Sources Contract Sources Normal Year Single Dry Year (e.g. Recycling) Contract Sources Multi-Year Drought 36 South Bay Aqueduct (SBA) Reliability 100% 220 80% 176 60% 132 40% 88 20% 44 0% 0 0% 20% WET YEARS (SWP Delta Water Delivery Study 2021B) 40% 60% Percent of Time At or Above NORMAL YEARS 80% DRY YEARS 100% CRITICALLY DRY YEARS 37 SBA SWP Contracts (1,000 AF/YR) Percent of Contract Amount SBA Agencies Contract for 220,000 acre-feet/year of Water from the State Water Project South Bay Aqueduct (SBA) Reliability 100% 220 SWP Availability 80% 176 60% 132 Reliable Supply 40% 88 20% 44 0% 0 0% 20% WET YEARS (SWP Delta Water Delivery Study 2021B) 40% 60% Percent of Time At or Above NORMAL YEARS 80% DRY YEARS 100% CRITICALLY DRY YEARS 38 SBA SWP Contracts (1,000 AF/YR) Percent of Contract Amount State Water Project Provides Full Contract Amount Only in the Wet Years South Bay Aqueduct (SBA) Reliability 100% 220 SWP Availability 80% 176 60% 132 Reliable Supply 40% 88 Repeat of 1987 to 1992 Drought = 40% Supply 20% 44 0% 0 0% 20% WET YEARS (SWP Delta Water Delivery Study 2021B) 40% 60% Percent of Time At or Above NORMAL YEARS 80% DRY YEARS 100% CRITICALLY DRY YEARS 39 SBA SWP Contracts (1,000 AF/YR) Percent of Contract Amount In Dry Years SBA Agencies Could Get 40% of Their Contract Amount South Bay Aqueduct (SBA) Reliability 100% 220 SWP Availability 80% 176 60% 132 Reliable Supply 40% 88 Repeat of 1987 to 1992 Drought = 40% Supply 20% 44 Repeat of 1977 Critical Dry Year - 20% Supply 0% 0 0% 20% WET YEARS (SWP Delta Water Delivery Study 2021B) 40% 60% Percent of Time At or Above NORMAL YEARS 80% DRY YEARS 100% CRITICALLY DRY YEARS 40 SBA SWP Contracts (1,000 AF/YR) Percent of Contract Amount In Critically Dry Years SBA Agencies Could Only Get 20% of Their Contract Amount South Bay Aqueduct (SBA) Need for SWP Water 100% 80% Excess Water Available 220 SWP Availability Conservation/Other 176 SBA Agencies Average Need for SWP Water 60% Supply Gap 132 40% 88 20% 44 0% 0 0% 20% WET YEARS (SWP Delta Water Delivery Study 2021B) 40% 60% Percent of Time At or Above NORMAL YEARS 80% DRY YEARS 100% CRITICALLY DRY YEARS 41 SBA SWP Contracts (1,000 AF/YR) Percent of Contract Amount SBA Agencies Have Excess Water in Wet Years and a Supply Gap in Dry Years Potential Drought Protection Benefits for SBA Agencies (Averages 25,000 AF/year) 100% 80% Deliver Water From Delta to Storage 220 SWP Availability 176 SBA Needs for SWP Water 60% Supply Gap 132 40% 88 20% 44 0% 0 0% 20% WET YEARS (SWP Delta Water Delivery Study 2021B) 40% 60% Percent of Time At or Above NORMAL YEARS 80% DRY YEARS 100% CRITICALLY DRY YEARS 42 SBA SWP Contracts (1,000 AF/YR) Percent of Contract Amount SWP Water is Available, In Wet Years, to Put into Storage Potential Drought Protection Benefits for SBA Agencies 100% 80% Deliver Water From Delta to Storage SWP Availability 176 Deliver Water From Storage to SBA SBA Needs for SWP Water 60% 220 132 40% 88 20% 44 0% 0 0% 20% WET YEARS (SWP Delta Water Delivery Study 2021B) 40% 60% Percent of Time At or Above NORMAL YEARS 80% DRY YEARS 100% CRITICALLY DRY YEARS 43 SBA SWP Contracts (1,000 AF/YR) Percent of Contract Amount Expanded Los Vaqueros Reservoir could provide up to 110,000 AF in a critically dry year and up to 300,000 AF in an extended drought Potential Benefits Delta Enhancement • Expanded Los Vaqueros Reservoir Enhances Delta Environment – Reduces impacts to fisheries from existing SBA Diversion • State-of-the-art fish screens • Flexible timing of diversion – Creates storage and flexibility for Environmental Water that could allow • Shut downs at state and federal pumps when fish are present (up to 158,000 acre-feet per year) • Water for wildlife refuges 44 • Water for in-stream flows upstream of Delta Potential Benefits Delta Enhancement Existing State Pumps – High volume – No outlet for fish – High fish losses Fish Screen Existing & Potential Los Vaqueros Diversions – Low volume and velocity – Fish can swim past screens – Very low fish losses 45 Potential Benefits Delta Enhancement When Fish are not Present • Expanded Reservoir creates opportunity to store Environmental Water – EWA owns capacity in an expanded Los Vaqueros Reservoir – Fill reservoir when no fish are near pumps and water quality is good – Normal export pumping – Deliveries to South Bay agencies out of Los Vaqueros Reservoir 46 Potential Benefits Delta Enhancement When Fish are near Pumps • Expanded Reservoir Creates Opportunity for Environmental Water – No filling Los Vaqueros – Deliveries to South Bay agencies out of Los Vaqueros Reservoir – EWA reduces or stops export pumps 47 Potential Benefits Conclusions • An expanded Los Vaqueros Reservoir could meet CCWD Principles 1 & 2 – The project improves water quality and reliability for CCWD – The project enhances the Delta environment • The project could meet CALFED objectives – Provide substantial water quality and reliability benefits for Bay Area water agencies, including CCWD – Provide state and federal resource agencies with water for the environment 48 Questions and Discussion • Expanded Los Vaqueros Reservoir Operations – Operating Scenarios – Range of Benefits for CCWD and Potential Partners • Improve Bay Area water quality and reliability • Enhance Delta environment 49 Meeting Agenda • Agenda – – – – 2003 Studies Activities and Available Information Current Delta Operations and CALFED Goals Los Vaqueros Reservoir Expansion Operations Facilities, Construction Schedule, and Costs • • • • Delta Intakes and Fish Screens Pumps and Pipelines Dam and Watershed Estimated Costs 50 Potential Facilities for an Expansion Project Delta Intake and Conveyance Delta-Los Vaqueros Pipeline & Pump Station Dam and Recreation LV-SBA Pump Station & Pipeline 51 Delta Intakes • 1-3 intakes on Old River • 250 or 500 cfs each • Approximately 1-2 acres each Intake Locations Range of Capacities Existing Old River 250 cfs 250 cfs New Old River 250 cfs 500 cfs New Middle River 500 cfs 1,000 cfs Total Capacity 1,000 cfs 1,750 cfs cfs = cubic feet per second • 1-4 intakes on Middle River • 250 or 500 cfs each • Approximately 1-2 acres each 52 Delta Intakes and Fish Screens Fish Screen Water Flow 53 Pumps and Pipelines • New Delta Pump Station to fill reservoir • New pipeline(s) to fill reservoir • 9 miles, mostly in existing rightof-way • Up to 12 ft. diameter • 25 acre site • 1,000 to 1,750 cfs • New pumps & pipeline to deliver water to South Bay Aqueduct (SBA) • 7 miles • Up to 8 ft. diameter • 430 cfs (same as SBA capacity) 54 Dam & Watershed • New dam upstream of existing dam – Materials reused from existing dam – New materials from within reservoir area – 13 acre staging area downstream of dam 55 Dam Construction Schedule 4 years of dam construction Range of Sizes Reservoir Capacity 300 500 (thousands of acre-feet) Dam Height (FT) 290 360 Dam Crest Length (FT) 1,850 2,300 Volume (million cubic yards) 10.8 18.5 56 Dam Construction Dam Safety Constructed to withstand maximum credible earthquake Redundant safety features Continuously monitored for safety 57 Recreation Facility Site Options • Recreation facilities will be replaced and enhanced – – – – – The Marina Fishing Piers The Interpretive Center Picnic Areas Trails • Many options identified for facility locations – Details to be presented in Part 3 (April) 58 Project Cost Estimate – Intake Facilities – Pipeline/Pumping Facilities – New Dam/Reservoir Facilities Range of Estimated Project Costs Cost ($millions) • Cost includes the size of project elements: $2,000 Inflation to Mid Point Construction Contingency (20%) $1,500 $1,000 $500 $0 300 TAF 500 TAF 500 TAF Other Project Costs (22%) Construction Costs 1,000 cfs 1,000 cfs 1,750 cfs 59 Project Cost Estimate Cost Estimate Description Reservoir (TAF) Diversion (cfs) Facilities Intake Facilities Delta Conveyance Pipelines Pump Stations Appurtenances Dam Power Supply Recreation Facilities Subtotal Mobilization (2%) Construction Cost Estimate Other Project Costs (22%) Contingency (20%) Subtotal Inflation to Mid-Point Construction Total Project Cost 300 1,000 Cost ($ million) 500 1,000 29 28 114 153 4 219 11 20 578 12 590 130 144 864 150 30 28 114 165 4 284 11 20 656 13 669 147 163 979 170 53 55 182 248 4 285 16 20 862 17 879 194 215 1,288 224 1,014 1,149 1,512 60 500 1,750 Construction Schedule Activity 2005 2006 2007 2008 2009 2010 Middle River Intake Old River Intake Dam Construction Delta-LV Pipeline Delta Pump Station LV-SBA Pipeline & Pumps Recreation Facilities Interim water supply from Middle River during dam construction 61 Questions and Discussion • Facilities and Costs – – – – Delta Intakes Pumps and Pipelines Dam and Watershed Project Costs & Schedule 62 Available Information • On project web site: www.lvstudies.com • In libraries and city offices in CCWD service area – See web site for list of locations • On CD by request 63 Contact Information Marguerite Naillon Project Manager CALFED Los Vaqueros Reservoir Expansion Studies 2300 Stanwell Drive P.O. Box H2O Concord, CA 94524 Phone: (925) 688-8018 email: [email protected] www.lvstudies.com 64 Next Steps • Comments on Today’s Discussion – Due February 14th by e-mail or regular mail • Future Workshops (see handout with schedule & locations) – Early March -- Partners, Benefits, and Payments -Value of benefits and institutional issues – Mid-April -- Environmental Effects & Mitigation -Strategies for addressing potential adverse effects – Late May -- Summary and Response to Comments -Review of CCWD Principles and answers to comments and issues 65 Information Available in March 2003 PARTNERS, BENEFITS & PAYMENTS Early March Reimbursement - Amount other partners would need to reimburse CCWD for shared facilities Benefits - Value of benefits for CCWD and potential partners (water quality, reliability, environmental, other) Institutional - Models for how other similar projects are owned and operated by participating agencies Financing - Financing costs and methods