Delta stewardship council Hearing -Delta conveyance project Update
COUNCIL WATER COMMITTEE
item 26-0294
MARCH 12, 2026
DELTA – SWITCHING YARD FOR WATER SUPPLY IN STATE
70 Reclaimed Islands
700 Miles Of Waterways
1,100 Miles Of Levees
State Water Project (SWP) Conveyance For Past 50 Years (Through-Delta Conveyance) Includes City’s Drinking Water Supply Intake And Regional Wastewater Control Facility Discharge Other Significant Infrastructure, Roads, Railroads, Gas Pipelines, Shipping Routes, Aqueducts 2 1980s – Governor Brown
opposition by City, County, Delta Agencies AND OTHERS
Defeated by Statewide Proposition
3 PERIPHERAL CANAL
California Water fix
2000s Governor Brown
Twin tunnels Project
Active Opposition by City & MANY Others
Defeated – Delta Stewardship Council
4 DELTA CONVEYANCE PROJECTPROPOSED TUNNEL ALIGNMENTS
Governor Newsom’s Proposal
Sacramento River Intakes
West/East Alignments
Water Supply - State Water Contractors (Bay Area, Central Coast, San Joaquin Valley & Southern CA) 5 Delta Conveyance project specifics
Concrete-lined Tunnel, 120 to 150 Ft. Belowground
40 ft by 45 Miles Long
7 Shaft Structures
17.5 Million CY Tunnel Muck, 2 Disposal Sites – Roberts Island, Twin Cities Rd.
Cost Est. $16 to $25+ Billion
Construction Schedule - 15+ years
6 Stockton’s Delta Background
largest municipality in the Sacramento-San Joaquin River Delta substantial amount water supply from Delta
could be uniquely impacted by the Delta Conveyance Project and a changing climate well-being of the City, its residents, and economy is inextricably linked to the Delta 7 Stockton’s Utilities tied to Delta
8 Delta Water Right
Advanced Water Treatment Plant - 2012
Project Cost = $223 Million
Regional Wastewater Control Facility
Discharge to Delta
MODs Project Cost = $245 Million
Project Completion - 2024
current Status
Delta Conveyance Project – Eng. & Draft CEQA
History Of Opposition:
Potentially Significant Impacts To City & Region:
Water Supply & Utility Operations
Jeopardize $468M Investment (ratepayer dollars)
Construction Impacts (10-15 years)
Future Long-term Impacts To City In Billions
Delta Stewardship Council Hearing:
Appeals Hearing, Feb. 26-27, 2026
Consistency Ruling
9 Failure to use bas
10 Conveyance project fails
11 Inconsistent - co-equal goals
12 Why important to Stockton
13 Not a New Concept: 1980s - Peripheral Canal & Water Fix (Twin Tunnels) Long History of Opposition/Other Alternatives
Significant Negative Impacts
Impacts On City’s Utilities:
Water Supply & Quality
Water/Wastewater Utility Operations
Increased Costs To Ratepayers for Services
Redirected Construction Impacts:
Traffic (Rail, Roads & Highways)
Noise & Air Quality (Districts #5 & #6)
Hospitals & Emergency Services
Wildlife & Environment
Recreation & Quality of Life
Environmental Justice, Equity & Disadvantaged Communities
Stockton STATE AND FEDERAL LEGISLATIVE PROGRAM Delta Protection and Enhancement Support legislation that maintains local control of water rights, water supplies and land use.
Oppose any legislation or administrative action that negatively impacts the City of Stockton’s interests in the Delta.
No actions should be taken related to the Delta that negatively impact the City’s:
water rights, supply and quality
air quality
economic vitality
local land use control
14 Stockton STATE AND FEDERAL LEGISLATIVE PROGRAM Delta Protection and Enhancement Advocate for the City’s interests throughout the…development of the Delta Conveyance Project Work proactively to protect the City’s rights and interests related to:
water resources & flood protection
achievement of tangible near-term progress on economic benefits and workforce development needs for the community 15