The Davis Woodland Water Supply Project. W O O D L A N D R O TA RY C L U B D e c e m b e r 1 3,

Transcription

1 The Davis Woodland Water Supply Project W O O D L A N D R O TA RY C L U B D e c e m b e r 1 3,

2 Presentation Overview Surface Water Project Overview Project Delivery Method Water Rights & Operations Budget and Schedule 2

3 Water Supply Issues 100% Dependent on groundwater Aging water infrastructure Degrading groundwater water quality Increasingly stringent drinking water regulations Increasingly restrictive wastewater discharge regulations Example: Nitrates Example: Hexavalent Chromium Example: Selenium, Salinity 3

4 Woodland Aging Well System years is the typical lifespan of a well

5 Concentration (mg/l) City of Davis Well Nitrate Levels 60 Drinking Water Action

6 Well Shutdowns Woodland Davis Well shut downs Active wells Under Construction 6

7 Governing Board: 2 council members from each city Non-voting representative from UC Davis and Yolo County FORMED September 15, 2009 JPA Funded Davis and Woodland UC Davis a Contracting Agency User fees in each city; cost sharing based on capacity allocation 7

8 Project Goals and Objectives Quantity & Quality Regulations Environmental Diversify Sustainable GW Conservation Improve water supply quantity and quality Comply with drinking water & wastewater discharge regulatory requirements Provide environmental benefits and minimize impacts Diversify supply portfolio to improve supply reliability Allow sustainable groundwater pumping integrated with ASR wells Integrate water conservation elements 8

9 ASR Wells Raw Water Transmission 4.5 miles Local Transmission Treatment Facility 30 mgd Intake/Pumping 400 cfs Water Transmission 9.9 miles Local Transmission 9

10 Project Partners Intake Reclamation District 2035 Davis- Woodland Water Supply Project City of Davis City of Woodland 10

11 Joint Intake Concept Drawing

12 Joint Intake Raw Water Piping in Pump Room

13 Joint Intake Installation of vibration sensors (left), ongoing electrical work (right)

14 Joint Intake Architectural work on building exterior

15 Groundbreaking Ceremony- April 10,

16 May 2,

17 Presentation Overview Surface Water Project Overview Project Delivery Method Water Rights & Operations Budget and Schedule 17

18 Delivery Methods Selected Design-Build-Operate Treatment Plant & Transmission Pipelines Design-Bid-Build: Intake City distribution pipelines Treatment Plant Pipelines Intake 18

19 Design-Build-Operate Initial DWWSP Concerns Is this private ownership? Are we stuck with private operations forever? Who controls water rates? 19

20 DBO is NOT Private ownership Establishment or control of water rates Private determination of customer water quality Permanent private operation Replacement of city staff 20

21 DBO is Guaranteed price for performance Cost-effective operations Timely project completion Facilities repair and replacement program Local employment and contracting Allocation of risk between public and private 21

22 Faster Delivery Life Cycle Cost Savings Early Price Certainty Opportunity for Innovation Collaborative Selection and Negotiation Process Singular Responsibility Appropriate Allocation of Risk Long-Term Operations Design-Build-Operate Benefits to DWWSP 22

23 Service Contract Items Important to Community Local employment and contracting Pre-approval of subcontractors and key personnel Quality Management Plan 23

24 Presentation Overview Surface Water Project Overview Project Delivery Method Water Rights & Operations Budget and Schedule 24

25 Balancing Supply and Demand Demands/Plant Sizing Supply Yield Analysis Supplemental Supply Sources 5 15% 85 95% PREVIOUS FUTURE 25

26 Water Supplies ASR/ Supplemental Supplies (primarily Woodland) Municipal Groundwater (Davis: Deep aquifer wells; Woodland: Emergency GW use only) Purchased Water (available Apr Oct; subject to Shasta critical years) Agency Water Right (subject to Term 91 curtailments) 26

27 Presentation Overview Surface Water Project Overview Project Delivery Method Water Rights & Operations Budget and Schedule 27

28 Construction Costs Project Component Project Costs June 2016 Cost (million dollars) Capital Costs, Cost Category Total Woodland Davis UC Davis Agency Administration DBO Contract Agency Quality Assurance & Contract Compliance (a) 7.52 Joint Intake TOTAL (a) Includes Agency design review, construction quality assurance and contract compliance, submittal and RFI review, environmental construction monitoring, environmental mitigation, Agency permitting and incidental costs. Program Management Water Supply Environmental & Permitting Land/ROW Acquisition Pre-Design Construction Capital Contingency Costs Expended Total Regional Costs Woodland and Davis Local Facilities TOTAL CAPITAL COSTS Updated: 6/15/16 28

29 Project Funding Intake Federal/State Grants $40.2M obtained ($20.1M each) Local WDCWA Share Project State Revolving Fund Loans Wastewater Nexus Safe Drinking Water and Clean Water SRF loan programs $274M of SRF loans secured 29

30 Project Implementation Schedule Financing 2011 Permitting Land Acquisition Pre-Design 2010 Permitting Pre-Design Water Right Permits DBO Procurement Financing 2012 Design/Permitting Land Acquisition DBO Procurement 2014 Regional/Local Facilities Design & Construction Intake Construction Financing 2013 DBO Contract Negotiation Permitting Land Acquisition Project Optimization Local Facilities Design Financing 2015 Intake/Pipelines/ Water Treatment Facility/Local Facilities Construction 2016 Completion of Construction System Testing Start-up and Operation D E S I G N C O N S T R U C T I O N O P E R A T I O N 30

31 Schedule Milestones Task Completion By Begin Initial Water Deliveries to Cities Early June Completion of Acceptance Test and Commencement of Operations Period June 29, 2016 Begin deliveries of raw water through Joint Intake Facility September 2016 Substantial Completion of Joint Intake Facility December 2016 Updated: 9/14/16

32 Dedication and ribbon cutting ceremony at the new RWTF July 28,

33 Joint Intake Dedication Ceremony September 13,

34 Operations Currently delivering ~ 12 mgd of treated surface water: Woodland: ~ 6 mgd Davis: ~ 6 mgd Meeting all regulatory and contract drinking water requirements CH2M working to optimize process operations 34

35 Questions

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