Water
Delivering high-quality water everyday.
Annual Report for the Fiscal Year Ending June 30, 2011
For over 77 years, we have delivered high-quality water by gravity to our San Francisco
Bay Area customers through the Hetch Hetchy Regional Water System. Since beginning
operation, this system of pipelines, tunnels, pump stations, and water treatment plants
that span 167 miles from the Sierra Nevada to the Bay has never failed to deliver water.
Feature:
Tesla Ultraviolet
Treatment Facility
Today, we are leading the way with our historic $4.6 billion Water System Improvement
Program (WSIP) – 81 projects to improve our system’s seismic resistance, and meet
advanced water quality requirements and water supply needs. This year, WSIP reached
the halfway point of construction, with program completion scheduled for 2016.
New Facility Applies Disinfection Technology of the Future
In 2011, our Tesla Ultraviolet Treatment
Facility was brought online to provide
advanced disinfection targeting biological
pathogens ranging from bacteria and
viruses to algae and protozoa.
2010-11 Milestones
First Tunnel Under the Bay
Construction of the 15-foot-diameter, 5-mile-long
Bay Tunnel – the first tunnel underneath
San Francisco Bay – began with the arrival and
assembly of the specialized Earth Pressure
Balanced Tunnel Boring Machine (TBM). The TBM
will bore an average of 50 feet per day, at a depth
of almost 100 feet under the Bay for the next
24 months. Launched this year, the project will
ensure ongoing water delivery, even after a major
earthquake or other natural disaster.
City’s Second Largest Reservoir Now
Earthquake-Ready
Completion of seismic up ܘY\