2023 Sewer System Master Plan
Overview
February 11th, 2025
▪ 2023 Sewer Master Plan Update
– Updated Sewer Planning Criteria
– Survey of over 200 manholes and pipe inverts
– Updated GIS layers
– Hydraulic Modeling and Condition Assessment
– Updated growth and sewer load projections
– Wet/Dry Flow Monitoring
– Performed capacity analysis
– Developed pipe risk scores based on CCTV inspection
– Developed 16-Yr Capital Improvement Program
MASTER PLAN PROJECT OVERVIEW
GIS UPDATES
▪ GIS Sewer Network Clean
Up
– As-Built reviews
– Spatial location of force
mains, gravity mains, and
manholes
– Pipe and Manhole IDs
– Diameter
– Other attributes (e.g.,
maintenance data, install
year, abandoned, material)
▪ Surveyed 200+ manholes
to update inverts
▪ Collaborative Effort
EXISTING SYSTEM GIS
HYDRAULIC MODEL UPDATE &
CALIBRATION
▪ Collaborated with City
staff
– Updated sewer pipe
network and invert data in
model
– Calibrated model against
2021-2022 flow
monitoring data as well as
historical BPS Influent Data
– Use 2015-2017 flow
monitoring data as
supplement data
FUTURE GROWTH AREAS
▪ Planning Criteria
– Prepared Sewer Design Guide as a separate document
▪ Analyzed the system under Existing (2023), Near-term
Future (2028), and Long-term Future (2043) PWWF
Conditions
– Accounted for a 10-yr 24-hour storm
CAPACITY EVALUATION
EXISTING SYSTEM CAPACITY EVALUATION
▪ Capacity Deficiencies under Existing PWWF
FUTURE SYSTEM CAPACITY EVALUATION
▪ Capacity Deficiencies under 2043 PWWF
CAPACITY-RELATED IMPROVEMENTS
PIPE CONDITION ASSESSMENT
▪ Used InfoAsset Planner to
analysis CCTV Inspection
Data conducted by City
▪ Performed Risk Analysis to
prioritize rehabilitation
actions
PIPE CONDITION ASSESSMENT (CONT’)
▪ Utilized Decision
Tree to Finalize
Rehab Plan
▪ Refined Rehab
Plan with Staff
Input
LIFT STATION CONDITION ASSESSMENT
▪ Reviewed prior
assessments
▪ Prioritized based
on risk
Lift Station (LS) LS Condition Summary Force Main Condition Summary
Island Park
Difficult Access, high I/I, settling
issue of control panel; near-term
CIP
Needs to be replaced; To be
upgraded with Island Park LS;
near-term CIP
Sports Complex Fair Condition; Low Risk May need to be upgraded with Island Park FM; near-term CIP
San Juan
Poor Condition; Difficult Access,
Poor Hydraulics, Rust Found on
Wet well and building;
Undersized; near-term CIP
Redundant force main; nearterm CIP
Ralston Ranch
Fair Condition; Access issues; rust
inside wet well, no backup level
control system, intermediate-term
CIP
Low Risk
Hiller Street
Poor condition, II Issue, no pump
redundancy, considerable
rust/deterioration on
pipes/supports, access issues.
Upgrades in 2024/2025
Susceptible to collapse and joint
leakage due to its material,
Upgrades in 2024/2025
El Camino Real Upgraded in 2021 Upgraded in 2021
North Road Upgraded in 2021 Redundant force main installed in 2021
Hastings Good Condition Low Risk
Haskins Good Condition Low Risk
Naughton Good Condition Low Risk
▪ Phased into near-term CIP (2024-2029),
intermediate-term CIP (2030-2034) and longterm CIP (2035-2039) over 16-year period ▪ Capacity-Related
– Upgrade San Juan Lift Station with 2 + 1 Pumps
– Upsize ~ 2.2 miles of gravity main *
▪ Condition-Related
– Hiller, Island Park, Ralston Ranch Lift Stations
– San Juan, Hiller, Island Park, and Sports Complex Force Mains
– Rehabilitate ~ 24 miles of gravity main *
* includes associated manholes
CAPITAL IMPROVEMENTS OVERVIEW
CAPITAL IMPROVEMENTS SUMMARY
▪ FY 2024-2029
– $ 11.8 Million (Capacity)
– $ 24.1 Million (Condition)
▪ FY 2030-2034
– $ 5.4 Million (Capacity)
– $ 16.1 Million (Condition)
▪ FY 2035-2039
– $ 2.2 Million (Capacity)
– $ 9.1 Million (Condition)
Thank you
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