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SEWER SYSTEM IMPROVEMENT PROGRAM | Grey. Green. Clean.
Mariposa Pump Station
Originally built in 1954, the Mariposa Pump Station is a dry-weather pump station that
pumps wastewater from the surrounding Mission Bay area to the Southeast Treatment
Plant for treatment.
The Mariposa Dry-Weather Pump Station and
Force Main Improvements Project will demolish
the existing pump station and construct a new
pump station at the same location; and will replace
the existing dry-weather force main with a larger
force main to accommodate the full buildout
of the Mission Bay community, the new Chase
Center, and planned population growth in the
Potrero Hill neighborhood. These facilities are
critical components of San Francisco’s wastewater
operations, and these upgrades will allow us to
meet the SSIP LOS goals, including the latest
seismic standards and sea level rise requirements
for San Francisco. By completing these projects,
SFPUC will continue to offer reliable and high-
quality sewer services to all who live, work, and
play in San Francisco. Leading up to the start of
construction in early 2019, project staff has been
coordinating and will continue to coordinate
with the local residents and businesses, other
City agencies, and private contractors who are
constructing projects in the nearby areas.