california waterfix program...and economy • unsustainable los angeles aqueduct colorado river...

CALIFORNIA WATERFIX PROGRAM

February 2019

OVERVIEW

• Need for WaterFix • Proposed Facilities • Current Status

SACRAMENTO/SAN JOAQUIN BAY-DELTA CRITICAL TO CALIFORNIA

• Highly altered ecosystem • Highly studied area • Some regions are 100%

dependent on Bay-Delta supplies

• Critical to California population and economy

• Unsustainable

Los Angeles Aqueduct

Colorado River Aqueduct

Conservation, Local Groundwater and Recycling

State Water Project

Bay-Delta Bay Area – 33%

Central Valley 23 to 90%

Metropolitan – 30%

Central Coast – 37%

- 30 feet Sea Level

WATER SUPPLY PATHWAY (ISLAND SUBSIDENCE BETWEEN 10-30 FT. DEEP)

Sea Level Rise

0

500

1000

1500

2000

1967 1973 1979 1985 1991 1997 2003

Levee Subsidence

KEY DELTA RISKS Seismic Risk Bay Area Faults

Fishery Declines Delta Smelt

CALIFORNIA WATERFIX IS IMPORTANT FOR CALIFORNIA

Sacramento

Stockton

Main Tunnels

South Tunnels

North Tunnels

Intermediate Forebay

Byron Tract Forebay & PS

Intakes

Head Old River Gate

CALIFORNIA WATERFIX

SYSTEM CONFIGURATION

North Tunnels

Main Tunnels

South Tunnels

RIVER INTAKE LOCATIONS

3000 cfs 3000 cfs 3000 cfs

RIVER INTAKES

Sedimentation Basin 1

Sedimentation Basin 2

Outlet shaft

Sediment drying lagoons

PROTECTING FISH

• Screen spacing – 1.75mm • Flow approach velocity = 0.2 ft/sec

TUNNEL REACHES

Intakes

Intermediate Forebay

Byron Track Forebay

Intakes Intakes

Staten Island Shafts

Bouldin Island Shafts

Bacon Island Shafts

SHAFTS

Shaft Diameter (feet)

Depth (feet)

Permanent (Yes/No)

Launch 110 180 Yes

Receiving 85 180 Yes

Intermediate* Contractor sized

Contractor sized No

*Shaft to be used for ventilation and/or TBM maintenance

TUNNELS

Tunnel Number of Tunnels

Internal Diameter (feet)

Length (miles)

North Tunnel 2 28 2 & 4.8

1 40 6.7

Main Tunnels 2 40 30

South Tunnel 2 40 1.6

TUNNELS

• 150 ft below grade

• 2-foot thick concrete liner

• Pressurized face tunnel boring machine

• 700,000 Tunnel Segments • 30 Million Cubic Yards of

Excavated Tunnel Material • 10-12 TBMs Operating

Simultaneously

90 ft 40’ 40’

45’

150 ft max depth

45’

Approximately 150’

90 ft

45’

40’

90’

TUNNEL LINING SYSTEM

• Single pass segmental concrete liner

• Single or dual gasket (tbd) • Bolted radial joints • Doweled circumferential • Ring = 9 Segments

including Key-Segment • Over 700,000 Segments

OVERALL HYDRAULIC PROFILE

Intake No.2

Intermediate Forebay

Byron Tract Forebay Pumping Plant

Intake No.3

EL. +1.0 FT EL. -3.0 FT EL. -17.0 FT EL. -7.0 FT

Hydraulic Gradient

-100’

-160’

0’

GEOTECHNICAL PROFILE

Ave. Ground Surface

Proposed tunnel zone

LARGE DIAMETER – TBM PROJECTS

42 43.3 45 45.5 46 47.5 49.5 50.6 51.2

57.5 58

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REVIEW OF MEGA TUNNEL PROJECTS

• The Eurasia Tunnel - Turkey Lee Tunnel - London Port of Miami Tunnel – Florida East Side Access - New York Blue Plains Tunnel Project - District of Columbia Bay Tunnel - San Francisco Willamette River Combined Sewer Outfall Program - Portland Gotthard Base Tunnel - Swiss Alps SR-99 Alaskan Way Replacement – Seattle

= projects visited by program team

INTERMEDIATE FOREBAY

Inlet Structure

Outlet Structure

Tunnels

Tunnels

37 Acre

97 Acre Footprint

1.4 miles Perimeter

2 million cy Embankment

BYRON TRACT FOREBAY

Main Tunnels

Clifton Court Forebay

South Tunnels

Byron Tract Forebay 810 Acre

BTF Pumping Plants

Connection Channel

Control Structures

South Tunnel Outlet

BTF Outlet

Control Structures

5 mile perimeter Fill 7.8 million cy

BYRON TRACT PUMPING PLANTS

Pump Unit

40-foot Main Tunnel

Pump Discharge

Pump Building Electrical Substation

Maintenance Building

Gravity/surge discharge

BYRON TRACT FOREBAY OUTLET STRUCTURE

Control Gates

Outlet Shafts

SOUTH TUNNEL OUTLET

Connection Channel

Control Gates

LOGISTICS

• Transport 700,000 segments by barge and truck • Over 30 million cubic yards of Re-useable Tunnel Material • Approximately 6,000,000 cubic yards of concrete • Over 200MW of power required to drive TBM • Approximately 27 miles of New power transmission system

required

DELTA CONVEYANCE DESIGN AND CONSTRUCTION AUTHORITY

• Single purpose public entity to design and construct project • Under contract with DWR to deliver California WaterFix facilities on

time, on budget, and in accordance with approved specifications • Participating Public Water Agencies • Will dissolve after DWR’s final acceptance of project

DELTA CONVEYANCE OFFICE AND

DESIGN AND CONSTRUCTION AUTHORITY

Provide oversight of DCA

California WaterFix

DWR Delta Conveyance Office

(DCO)

Delta Conveyance Design and Construction Authority

(DCA)

DESIGN AND CONSTRUCTION AUTHORITY

LEGAL COUNSEL

EXECUTIVE DIRECTOR

TREASURER EXTERNAL AFFAIRS

AUDIT

STAFFING & ADMIN

PROGRAM MANAGER

RISK MANAGEMENT SAFETY

CHIEF ENGINEER

ENVIRONMENTAL & PLANNING QA / QC

PROPERTY ACQUISITION

INFORMATION TECHNOLOGY &

SYSTEMS

PROGRAM CONTROLS &

CONTRACTING

CONVEYANCE MITIGATION

ENVIRONMENTAL PERMITS

OFFICE MANAGEMENT

STAFFING

PERFORMANCE MANAGEMENT

STANDARDS

PROCUREMENT/ CONTRACTING

PROG CONTROLS

GENERAL TECHNOLOGY

CENTRALIZED ADMINISTRATION

APPRAISAL & ACQUISITIONS

ROW, SURVEY & MAPPING

ENGINEERING DESIGN MANAGER

TUNNELS & SHAFTS

UTILITIES, POWER & ROADS

PUMPING PLANT

INTAKES FOREBAYS GEOTECH COMMUNICATIONS, NETWORK, SCADA

COMMISSIONING

PROGRAM ADVISORY

ORGANIZATIONAL STRUCTURE (DRAFT)

EXECUTIVE DIRECTOR REPORTS

PROGRAM MANAGER REPORTS

TECHNICAL LEADERSHIP WORK TEAM

BOARD REPORTS DCA

BOARD OF DIRECTORS

1

2

1. Estimating function will report to the Chief Engineer 2. Engineering Support function will be provided by the Engineering Design Manager Team

OVERALL PROJECT SCHEDULE

2014 Dollars 2017 Dollars

Environmental Mitigation* $367 M $401 M

Conveyance System Cost $14.9 B $16.33 B

Overall Cost $15.3 B $16.7 B

*The mitigation costs for capital and O&M for 25 years equals $796M in 2014 dollars or $870M in 2017 dollars

CAPITAL COSTS

INFORMATION

DCA Link: http://www.dcdca.org/Business_Opportunities.htm

Questions?

PROPOSED CONSTRUCTION–ANIMATION

• If time is available

PROPOSED CONSTRUCTION - ANIMATION • Check at https://californiawaterfix.com/ for detailed Animation

Videos.