PROJECT FACTSHEET
SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean.
CENTRAL BAYSIDE IMPROVEMENT PROJECT
Improving Our Sewer System and Benefiting the Community
The Central Bayside System Improvement Project (CBSIP) is a part of the Sewer System Improvement Program (SSIP), and is a
critical element of the City’s efforts to upgrade the aging and seismically vulnerable combined sewer system on the Bayside.
As part of the Bayside Collections System, the Channel Force Main transports 64% of wastewater from homes and businesses
on the Bayside to the Southeast Treatment Plant. This important piece of infrastructure is a weak link on the Bayside as it is
vulnerable to seismic damage, and has suffered several failures since the 1989 Loma Prieta earthquake.
The design team is investigating the potential for tunnels to provide reliable and redundant gravity conveyance and storage of
wastewater flows from the Channel Pump Station (located near AT&T Park) to the Southeast Treatment Plant. Improvements to
selected pump stations are also under consideration. In addition, the project will include a set of green infrastructure projects to
help manage stormwater and provide community benefits such as neighborhood beautification and educational opportunities.
The Project Seeks To:
• Improve seismic reliability by adding needed redundancy to the Channel Force Main, improving the Bayside Collection System
• Ensure compliance with current and potential future regulatory requirements for combined wastewater discharges into the Bay
• Improve stormwater management in the Channel and Islais Creek watersheds
Channel PS Improvements
(CHS)
7th
St.
Channel
PS
.
l St
nne
Cha
Retrieval Shaft
St.
3rd
16th St.
17th St.
St.
Iowa
22nd St.
(Mission Bay P7)
This map shows the project’s
proposed alternatives for reliable
gravity conveyance tunnels
to manage wastewater and
improvements to pump stations.
St.
see
nes
St.
Ten
ota
nes
Min
St.
iana
Ind
De Haro St.
Wisconson St.
Carolina St.
20th St.
St.
ania
nsylv
Pen
(Carolina/Channel)
St.
Arkansas
Retrieval Shaft
Proposed Features:
Channel Outfall Consolidation T/S Box
St.
Irwin ell St.
b
Hub
15th St.
Division St. Sewer
.
y St
Berr
23rd St.
24th St.
Channel Tunnel
25th St.
(Carolina Street)
Channel Force Main
Channel Tunnel
(Indiana Street)
Cesar Chavez St.
Islais Creek T/S Box Intertie
Launching Shaft
St.
3rd
Marin St.
Channel Tunnel Dewatering PS
n St.
oleo
(Caltrans Property)
Bruce Flynn Improvements
Existing Pipes
(BFS)
lb
y
Indiana St.
CBSIP Integrated Alternative
Se
To
l
an
d
Carolina St.
CBSIP Integrated Alternative
St
.
St
.
Qu
New Sewer Line
Bruce Flynn
PS
St
.
Pump Stations
int
Nap
Potential Shaft Location
(SF Port Property)
Southeast Treatment Plant (SEP)
Headworks
Car
go
Cu
ste
r
Av
e.
Bu
rke
Wa
y
Ave
.
Launching Shaft
This project will develop a
range of potential options
that includes both green
and grey infrastructure
improvements.
• Grey infrastructure may
consist of gravity tunnels,
detention basins, sewers
and pump stations.
• Green infrastructure
may include permeable
surfaces, rain gardens,
green roofs, and rainwater
harvesting. Locations for
green infrastructure may
include schools and other
public parcels.
(SFPUC Property)
Project Timeline:
2013
2015
2017
2019
2021
2023
Planning
Design
Construction
sfwater.org/centralbayside
Green infrastructure can help manage and treat stormwater onsite before it enters the sewer system and also
provide livable city benefits like neighborhood beautification and traffic calming.
PERMEABLE PAVEMENT: Allows
stormwater to soak into the ground in
contrast to hard surfaces (concrete or
asphalt) where stormwater rapidly flows
into the sewer system.
RAIN GARDENS: Capture stormwater
runoff from streets, roofs, and parking lots.
Plants and soil absorb that water, reducing
the amount of runoff overwhelming the
sewer system.
BULB OUTS WITH GREEN
INFRASTRUCTURE: Extend the sidewalk,
calming traffic and increasing pedestrian
safety. Bulb outs may include green
technologies that capture and treat
stormwater.
Wiggle Neighborhood Green
Corridor
The Wiggle Neighborhood Green Corridor is an innovative
project in the Channel Watershed and is one of eight
green infrastructure projects currently in development
throughout the City. A joint project with the San Francisco
Municipal Transportation Agency (SFMTA), San Francisco
Public Utilities Commission (SFPUC), and San Francisco
Department of Public Works (SFDPW), this project is
designed to reduce the amount of stormwater from this
neighborhood entering the City’s combined sewer system
and improve walking and biking conditions along the
iconic “Wiggle” bicycle route and neighborhood streets.
Project Rendering of Design Concept Along
Wiggle Neighborhood Green Corridor
Proposed Features:
• Bulb-outs with Rain Gardens
• Permeable Pavement
Community Benefits:
• Improved stormwater management and reduced
localized flooding
• Enhanced safety for pedestrians and bicyclists
• Traffic calming
• Increased amount of landscaping in the right-of-way
• Neighborhood beautification
[email protected]
sfwater.org/ssip
January 2015
About the Sewer System
Improvement Program
The Wiggle Neighborhood Green Corridor is a part of
the Sewer System Improvement Program (SSIP), a 20year, multi-billion dollar citywide investment required to
upgrade our aging sewer system. The SSIP is the result
of an eight-year community planning process and will
ensure a reliable, sustainable and seismically safe sewer
system now and in the future.