February 6, 2023
Storm Sewer and Sanitary Sewer
Annual Reports
Transportation and Environment Committee
Presented by:
• Mathew Nguyen 1
Introduction
Storm Sewer System
➢ 1,100 miles of pipes
➢ 4,500 miles of curb &
gutter
➢ 26,000 manholes
➢ 33,000 laterals
➢ 35,500 inlets
➢ 1,712 outfalls
➢ 31 pump stations
Sanitary Sewer System
➢ 2,030 miles of pipes
➢ 10 miles of force mains
➢ 39,469 manholes
➢ 202,000 laterals
➢ 17 pump stations
Transportation and Environment Committee
2 Storm Sewer Key Initiatives
▪ Storm Water Quality
• Stormwater Permit Reissuance
• Trash Load Reduction
• Green Stormwater Infrastructure
✓ River Oaks Stormwater Capture
✓ City Lands South of Phelan
▪ Master Planning
• Capacity Assessment
• 22 High Priority Projects - $215M
▪ Improvements/Rehabilitations
• Charcot Area Capacity Improvements
• Outfall Rehab/Improvement Program
• Large Trash Capture Phase VII
• SCADA upgrades for storm pump stations
Transportation and Environment Committee
River Oaks Stormwater Capture Project
3 River Oaks Stormwater Capture Project
• $12.5M in Total cost with
funding from Measure T and
State Grant
• Retrofit existing pump
station and detention basin to
clean stormwater.
• Design is 90% complete
• Construction start: 2023
• Beneficial Use: Spring 2024
Transportation and Environment Committee
River Oaks Stormwater Capture Project
4 City Lands South of Phelan Project
• $22.6M in Total cost with
funding from Measure T and
State Grant
• New facility adjacent to
horse stables and Yerba
Buena Highschool
• Concept is complete with
Design starting in 2023
• Construction start: 2025
• Beneficial Use: Spring 2026
Transportation and Environment Committee
City Lands South of Phelan Project
5 Storm Drain Master Planning
◼ Citywide SD System Modeling
✓ Initial results identified 22 high
priority projects ($215M)
◼ Refine Hydraulic Model
✓ Refining model using more accurate
land use and hydraulic information
✓ Refining boundary condition with
post 2017 updated Valley Water
riverine model
✓ Refining and identifying project
alternatives for North San Jose
($55M), Diridon Area ($115M),
Ross Creek ($4M), Willow Glen
($150M) and Coyote Creek ($55M)
Transportation and Environment Committee
6 Charcot Area System Improvement
• Measure T funding of $35M
• Low ground, high creek water level and insufficient system capacity • Rerouting stormwater to existing Rincon II PS
• Design Completion: 2024
• Construction: 2024 to 2025
• Beneficial Use: Spring 2025
Transportation and Environment Committee
STORM SEWER ALIGNMENT
7 Large Trash Capture
• Regional Stormwater Permit
mandated trash load reduction
• Phases I - VI completed
✓ 32 Large Trash Capture (LTC)
devices installed to date
• Phase VII – Construction started
• 6 locations ($7M to $9M)
• Leverage Caltrans funding
• Poly Carbonate Biphenyls (PCB)
• LTC Phase VIII – Scoping started
Transportation and Environment Committee
Large Trash Capture Installation
8 • Coordination with Valley Water
• Pump Station Maintenance
• Charcot Temporary Pumps
• Storm Inlet Cleaning
• Debris Basin Cleaning
• Portable and Temporary
Pumping
• Storm Monitoring and Incident
Management
Rincon I Storm Pump Station
2021-22 Winter Storm Season
Preparation
Transportation and Environment Committee
9 Sanitary Sewer Key Initiatives
◼ Capacity Master Planning
• Support General Plan 2040
• Neighborhood service reliability
• Watershed Protection / Regulatory
Compliance
◼ Condition Assessment
• Interceptor Assessment Program
• Risk Based Approach
• Decrease Sanitary Sewer Overflows (SSO)
◼ System Capacity Improvement &
Rehabilitations
• Capacity and Improvements
• SCADA upgrades and Pump station Rehab
60-inch Brick Sewer
Transportation and Environment Committee
10 Sanitary Sewer Overflow Data
Transportation and Environment Committee
FY 11/12 FY 12/13 FY 13/14 FY 14/15 FY 15/16 FY 16/17 FY 17/18 FY 18/19 FY 19/20 FY 20/21 FY 21/22 Total 192 155 101 97 55 58 22 42 31 35 35
192 155 101 97 55 58 22 42 31 35 35
0 20
40 60
80 100
120
140
160
180
200
NUMBER OF SSO
SANITARY SEWER OVERFLOW
11 Goals
✓ Continue to focus on GP 2040 capacity
demands to support economic development
✓ Increased investment into the systems to
address deferred maintenance infrastructure
backlogs (DMIB)
✓ Prioritized Capital Improvement Programs to:
• Lower operational costs
• Ensure capacity / Prevent SSO & Flooding
• Improve system reliability
Transportation and Environment Committee
12 Recommendation
Accept the Storm Sewer and Sanitary
Sewer Annual Reports highlighting
investments, activities and capital
improvements to the City’s storm sewer
and sanitary sewer collection systems
for Fiscal Year 2021-2022
Transportation and Environment Committee
Mathew Nguyen February 6, 2023
13 Goals
✓ Incorporate equity in Capital project delivery
✓ Pursue additional funding for storm capital
program and Green storm water infrastructure
(GSI)
✓ Improve Communication and Coordination with
other City Departments:
◆ Identify GSI project locations
◆ Funding opportunities
◆ Define Roles and responsibilities
Transportation and Environment Committee
14