The Davis Woodland Water Supply Project W OOD LA N D R OTA RY C - - PowerPoint PPT Presentation

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The Davis Woodland Water Supply Project W OOD LA N D R OTA RY C - - PowerPoint PPT Presentation

Dec 06, 2023 12 likes •382 views

The Davis Woodland Water Supply Project W OOD LA N D R OTA RY C LU B D ecember 13, 2016 Presentation Overview Surface Water Project Overview Project Delivery Method Water Rights & Operations Budget and Schedule 2 Water Supply Issues

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SLIDE 1

The Davis Woodland Water Supply Project

W OOD LA N D R OTA RY C LU B D ecember 13, 2016

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SLIDE 2

Surface Water Project Overview Project Delivery Method Water Rights & Operations

Presentation Overview

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Budget and Schedule

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Water Supply Issues

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100%

Dependent on groundwater

Degrading

groundwater water quality

Aging water infrastructure

Increasingly stringent drinking

water regulations

Increasingly restrictive

wastewater discharge regulations

Example: Nitrates

Example: Hexavalent Chromium

Example: Selenium, Salinity

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SLIDE 4

30 50

Woodland Aging Well System

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30 – 50 years is the typical lifespan of a well

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30 60

1999 2007 2015 2023 2031

Concentration (mg/L)

Drinking Water

City of Davis Well Nitrate Levels

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Action

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SLIDE 6

Well Shutdowns

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Woodland Davis

Well shut downs Active wells Under Construction

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Governing Board: 2 council members from each city Non-voting representative from UC Davis and Yolo County FORMED

September 15, 2009

JPA

Davis and Woodland

UC Davis a Contracting Agency Funded

User fees in each city; cost sharing based on capacity allocation

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SLIDE 8

Project Goals and Objectives

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Improve water supply quantity and quality

Quantity & Quality Regulations Environmental Diversify Sustainable GW Conservation

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

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SLIDE 9

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

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Project Partners

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City of Davis City of Woodland

Intake

Reclamation District 2035

Davis- Woodland Water Supply Project

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Joint Intake Concept Drawing

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Joint Intake

Raw Water Piping in Pump Room

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Joint Intake

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

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Joint Intake

Architectural work on building exterior

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Groundbreaking Ceremony- April 10, 2014

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SLIDE 16

May 2, 2016

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Surface Water Project Overview Project Delivery Method Water Rights & Operations

Presentation Overview

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Budget and Schedule

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Design-Build-Operate

  • Treatment Plant &

Transmission Pipelines Design-Bid-Build:

  • Intake
  • City distribution pipelines

Delivery Methods Selected

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Pipelines Intake Treatment Plant

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Design-Build-Operate Initial DWWSP Concerns

Is this private

  • wnership?

Are we stuck with private

  • perations

forever? Who controls water rates?

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  • Private ownership
  • Establishment or control of water

rates

  • Private determination of customer

water quality

  • Permanent private operation
  • Replacement of city staff

DBO is NOT…

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SLIDE 21
  • 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

DBO is…

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SLIDE 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

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Service Contract Items Important to Community

Pre-approval of subcontractors and key personnel Local employment and contracting Quality Management Plan

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Surface Water Project Overview Project Delivery Method Water Rights & Operations

Presentation Overview

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Budget and Schedule

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Balancing Supply and Demand

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Demands/Plant Sizing Supply Yield Analysis Supplemental Supply Sources

5 – 15% 85 – 95%

PREVIOUS FUTURE

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Water Supplies

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)

ASR/ Supplemental Supplies

(primarily Woodland)

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Surface Water Project Overview Project Delivery Method Water Rights & Operations

Presentation Overview

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Budget and Schedule

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Project Costs – June 2016 (million dollars)

Project Component Cost DBO Contract 145.86 Agency Quality Assurance & Contract Compliance(a) 7.52 Joint Intake 17.57 TOTAL 170.95 Cost Category Total Woodland Davis UC Davis Agency Administration 3.18 1.56 1.47 0.16 Program Management 4.40 2.17 2.05 0.17 Water Supply 1.81 1.29 0.50 0.02 Environmental & Permitting 1.27 0.62 0.60 0.06 Land/ROW Acquisition 4.24 2.00 2.00 0.25 Pre-Design 5.94 3.21 2.51 0.22 Construction 170.95 91.26 68.74 10.94 Capital Contingency 5.19 2.63 2.34 0.22 Costs Expended 2009-2011 7.59 4.02 3.48 0.06 Total Regional Costs 204.54 108.75 83.69 12.11 Woodland and Davis Local Facilities 74.70 31.50 35.50 7.70 TOTAL CAPITAL COSTS 279.2 140.2 119.2 19.8

Construction Costs Capital Costs, 2009-2016

(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.

Updated: 6/15/16

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Project Funding

Intake Project

Federal/State Grants

  • $40.2M obtained ($20.1M each)
  • Local WDCWA Share

State Revolving Fund Loans

  • Wastewater Nexus
  • Safe Drinking Water and Clean Water

SRF loan programs

  • $274M of SRF loans secured

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2010

Permitting Pre-Design

2011

Permitting Land Acquisition Pre-Design Water Right Permits DBO Procurement Financing

2012

Design/Permitting Land Acquisition DBO Procurement Financing

2013

DBO Contract Negotiation Permitting Land Acquisition Project Optimization Local Facilities Design Financing

2015

Intake/Pipelines/ Water Treatment Facility/Local Facilities Construction

2014

Regional/Local Facilities Design & Construction Intake Construction Financing

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

Project Implementation Schedule

2010-2016

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Task Completion By Begin Initial Water Deliveries to Cities Early June 1 2016 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

Schedule Milestones

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Dedication and ribbon cutting ceremony at the new RWTF – July 28, 2016

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Joint Intake Dedication Ceremony

September 13, 2016

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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
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Questions

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SLIDE 36

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