City of Poway Water Infrastructure
Improvement Program
(PWIIP)
April 15, 2025
Project Update
Agenda
Water System Overview
Water Infrastructure
Improvement Program
Update
18 Month Look Ahead
City of Poway – Water Infrastructure Improvement Program
Water System Overview
• Poway currently obtains 100% of its
water supply from the San Diego County
Water Authority as untreated water via
the First Aqueduct
• Lake Poway provides untreated water
storage
• Treatment is performed at the Lester J.
Berglund Water Treatment Plant (WTP)
• Water distributed throughout the City
from the Berglund WTP
City of Poway – Water Infrastructure Improvement Program
Major Facilities
• Berglund WTP 24 million gallon per day
capacity (conventional filtration)
• Lake Poway provides 3,300 acre-feet of
storage
• 15 Pump Stations
• 20 Storage Reservoirs
• 22 Pressure Reducing Stations
• 317 miles of transmission and
distribution main
• 2,900 Fire Hydrants
• ISO Class 1 System for Fire Protection
City of Poway – Water Infrastructure Improvement Program
Clearwell
Replacement – In
Construction
Treated Water
Facilities – In Design
PWIIP - Three Phase Program
Clearwell
Bypass – In Operation
City of Poway – Water Infrastructure Improvement Program
Clearwell Bypass Project
• Temporary bypass tanks for storage
• Temporary pump station required to
pump water to the tanks
• Temporary 24” above-ground piping and
pressure reducing station
• Permanent 36” below-ground pipeline
• Construction completed under budget
($7.6 million) and in operation since
November 2022
City of Poway – Water Infrastructure Improvement Program Clearwell
Replacement – In
Construction
Treated Water
Facilities – In Design
Three Phase Program
Clearwell
Bypass – In Operation
City of Poway – Water Infrastructure Improvement Program
Clearwell Replacement Project
• Replace the 1964 lined and
covered clearwell with two concrete tanks
• Re-locate storm drains around new tanks
• Replace inlet, outlet and drain piping and
valves
• Construct two new 4 MG concrete tanks
• Removal of the temporary bypass facilities
& restoration of the softball field
Status
• $31.6 million construction contract
• Construction is roughly 50% complete
• Commissioning expected late Spring 2026
City of Poway – Water Infrastructure Improvement Program
City of Poway – Water Infrastructure Improvement Program Earthwork and Retaining
Walls
City of Poway – Water Infrastructure Improvement Program Storm Drains
City of Poway – Water Infrastructure Improvement Program Vaults
City of Poway – Water Infrastructure Improvement Program Pipelines
City of Poway – Water Infrastructure Improvement Program North Tank Pad/Floor
City of Poway – Water Infrastructure Improvement Program Wall Reinforcing and
Seismic Cables/Vertical
Tendons
City of Poway – Water Infrastructure Improvement Program North Tank
Walls/Columns
Clearwell
Replacement – In
Construction
Treated Water
Facilities – In Design
Three Phase Program
Clearwell
Bypass – In Operation
City of Poway – Water Infrastructure Improvement Program
Treated Water Facilities
• Provides Poway with a source of treated
water (redundant supply)
• Maximizes use of existing Poway and
Ramona MWD facilities
• Provides operational flexibility and
enhances ability to sell water to Ramona
• Enables future WTP maintenance and
rehabilitation
• Related Projects: Emergency
Interconnection Nos. 1 and 2 with the City
of San Diego (Avenida La Valencia and
Poway Road/Springhurst Drive)
City of Poway – Water Infrastructure Improvement Program
Treated Water Facilities
Current Status
• Completed Design Work: Supplemental
Preliminary Design Report, Surveying, and
Potholing
• Executed MOU with Ramona MWD to
establish coordination during design
• Staff to negotiate Water Purchase
Agreement between City and Ramona
MWD
• Final Design and CEQA completion late
2025
City of Poway – Water Infrastructure Improvement Program
Related Projects
Interconnections with the City of San Diego
• Emergency Interconnection No. 1 at
Avenida La Valencia and Bridle Trail –
Design Phase
• Emergency Interconnection No. 2 on
Poway Road from Springhurst Drive to
Francine Terrace – Request for Proposal
Phase
City of Poway – Water Infrastructure Improvement Program
18 Month Look Head
• Emergency Interconnection No. 1 at
Avenida La Valencia Design Completion
Summer 2025
• TWF Design and CEQA approval Late 2025
• Clearwell Commissioning/Bypass
Retirement late Spring 2026
• TWF Construction Start Spring 2026
• Emergency Interconnection No. 2 at Poway
Rd/Springhurst Design Completion Summer
2026
• Lake Poway Softball Field Restoration late
2026
City of Poway – Water Infrastructure Improvement Program
Questions?
City of Poway – Water Infrastructure Improvement Program