Shared Services:
Baker Water Treatment Plant
Paul Cook
Irvine Ranch Water District
General Manager
February 21, 2013
Background on IRWD
About Irvine Ranch Water District
Water, Wastewater, Water Recycling, Urban Runoff
California Special District governed by a publicly-elected Board
IRWD customer base:
• Residential population: 350,000
• Daytime population: over 500,000
• Service connections: 102,381
IRWD service area:
• 181 square miles (20% of Orange County)
• All or part of six cities and unincorporated county:
Irvine
Tustin
Orange
Lake Forest
Newport Beach
Costa Mesa
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About the Irvine Ranch Water District
IRWD services and system statistics:
 Potable Water: Three treatment plants, 25 wells, 1,500 miles of pipelines
 Wastewater: Nearly 1,000 miles of sewage collection pipelines
 Recycled Water: Two water recycling facilities (28 MGD + 5.5 MGD) and
approximately 500 miles of recycled water pipelines
 Urban Runoff Treatment: The San Joaquin Marsh and 31 built and
planned man-made wetland treatment sites
IRWD Shared Services
Baker Water Treatment Plant
Baker Water Treatment Plant
Project Objectives:
1. Improve potable water supply reliability for southern Orange
County by constructing a local regional water treatment facility.
2. Collaborate with multiple retail water agencies to optimize
treatment capacity and conveyance.
3. Design facility to treat raw water from three sources, blended or as
individual sources.
4. Utilize modern treatment technology to
produce water that meets standards
stricter than current regulatory
requirements.
5. Minimize waste by operating plant at
greater than 99% recovery efficiency.
Advanced water treatment facility
with microfiltration membranes,
UV disinfection, and chloramines
for residual disinfection
Baker Water Treatment Plant
Diemer
Plant
Why this project?
• Optimize available capacity in the
Baker Pipeline.
(43.5 cfs; 28,200 AFY; 63,300 homes)
Why at IRWD?
• Utilize existing storage and
conveyance facilities.
• IRWD operates other membrane
treatment facilities.
At what cost?
• Total cost estimate: $79 million.
• All-in cost: $898 per acre-foot.
Baker
Pipeline
Lower
Feeder
Santiago
Lateral
Irvine
Lake
Lake
Mathews
AMP
Baker
Plant Site
South
County
Pipeline
South OC Regional Imported Water Distribution System
Baker Water Treatment Plant
Multi-agency project with six primary stakeholders
Capacity Ownership Split:
Agency
Flow Rate,
cfs (MGD)
Capacity
ETWD
5.0 (3.2)
11.5%
IRWD
10.5 (6.8)
24.1%
MNWD
13.0 (8.4)
29.9%
SMWD
13.0 (8.4)
29.9%
TCWD
2.0 (1.3)
4.6%
TOTAL
43.5 (28.1)
100.0%
* MWDOC does not own capacity, but participated in the Feasibility Study and will
facilitate the purchases of untreated water from the Metropolitan Water District.
Moulton Niguel Water District
Site Is Part of Overall IRWD Baker Property
Project Site at Construction Completion
16 MG RESERVOIR
16 MG RESERVOIR
PRODUCT WATER
PUMP STATION
CT BASIN
IRWD Contact Information
Paul Cook
IRWD General Manager
Phone: (949) 435-5590
E-mail: cook@irwd.com
www.irwd.com
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