Hetch Hetchy Power System Generating clean energy for San Francisco

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1 Hetch Hetchy Power System Generating clean energy for San Francisco Providing generation, transmission, energy efficiency and other clean energy services for our City

2 A Diverse, Clean Energy Portfolio The Hetch Hetchy Power System is the clean energy backbone of the City and County of San Francisco. Our diverse energy portfolio has a zero greenhouse gas emission profile. It doesn t produce any harmful radioactive byproducts or leave behind any waste. By relying on clean, greenhouse gas-free Hetch Hetchy energy, San Francisco avoids discharging approximately 175,000 metric tons of carbon dioxide each year into the atmosphere. Cost-Effective Hydroelectric Energy The Hetch Hetchy Power System comprises four hydroelectric powerhouses: Transmission Each powerhouse transmits its energy to the Bay Area along Cityowned transmission lines that traverse the state of California. Moccasin Powerhouse, and a nearby small in-line hydroelectric unit, rely on gravity-driven water flowing downhill from the Hetch Hetchy. Kirkwood Powerhouse, like Moccasin Powerhouse, is also dependent on gravity-driven water flowing downhill from the Hetch Hetchy. Holm Powerhouse relies on gravity-driven water flowing downhill from Cherry Lake. The combined hydroelectric output for these facilities is approximately 385 megawatts. HYDROELECTRIC GENERATION Approximate Hydroelectric Capacity: MW Powerhouse Date On-Line Unit 1 Unit 2 Unit 3 Holm Powerhouse MW 82.5 MW Kirkwood Powerhouse MW 39.5 MW 36.5 MW Moccasin Powerhouse MW 50 MW SMALL HYDROELECTRIC GENERATION Total Small Hydroelectric Capacity: 4 MW Project Date On-Line Location Output Moccasin Low-Head Unit 1987 Moccasin Powerhouse 3.75 MW University Mound 2015 University Mound 240 kw Sourced from the California Energy Commission. Clean Solar Energy Our municipal solar arrays have a generating capacity of 7.5 megawatts of clean, renewable solar energy. Some of our larger arrays include: The Sunset Solar Project (5 megawatts). Moscone Center Solar Array (676 kilowatts). San Francisco International Airport (SFO) (456 kilowatts). PHOTOVOLTAIC (PV) GENERATION Total Solar Capacity: 7.5 MW Project Date On-Line Location Output Moscone Convention Center Mar, Howard St. 676 kw Southeast Wastewater Oct, Phelps St. 255 kw Pier 96 Jan, 2007 Pier kw Maxine Hall Neighborhood Dec, Pierce St. 32 kw Medical Center North Point Dec, Bay St. 241 kw Wet-Weather Facility City Distribution Division Dec, Newcomb Ave. 134 kw Chinatown Public Library Jan, Powell St. 10 kw SFO Mar, 2008 Terminal kw Sunset Nov, 2010 Ortega & 28th Ave. 5 MW MUNI Maintenance Yard Oct, Indiana St. 106 kw Chinatown Public Health Center Tesla Water Treatment Facility Nov, Mason St kw Mar, 2012 Tracy, CA 32 kw SFPUC Headquarters Jun, Golden Gate Ave. 164 kw Alvarado Elementary School Nov, Douglass St. 50 kw MUNI Ways and Structures Sept, Pennsylvania Ave. 101 kw

3 Hetch Hetchy Power System Map SAN FRANCISCO HETCH HETCHY POWER SYSTEM Photovoltaic (PV) Biogas Lake Lloyd (Cherry Lake) Lake Eleanor SFO HAYWARD Hydroelectricity SUNOL VALLEY Cherry Power Tunnel Canyon Holm Power Tunnel Powerhouse Tuolumne River O'Shaughnessy Dam Kirkwood Powerhouse Hetch Hetchy PACIFIC OCEAN San Andreas Pilarcitos Crystal Springs SAN FRANCISCO BAY * Newark Substation San Antonio Calaveras Dam & SAN JOAQUIN Moccasin-Newark Transmission Line Tesla Water Treatment Facility Early Intake Priest Diversion Dam Moccasin Powerhouse and New Don Pedro YOSEMITE NATIONAL PARK *Hetch Hetchy energy enters the electricity grid at the Newark Substation. North Point Wet-Weather Facility (PV) Chinatown Public Library (PV) Alvarado Elementary School (PV) Sunset (PV) MUNI Ways and Structures (PV) Oceanside Wastewater (Biogas) SAN FRANCISCO San Francisco County San Mateo County Chinatown Public Health Center (PV) Moscone Convention Center (PV) SFPUC Headquarters (PV) Maxine Hall Neighborhood Medical Center (PV) MUNI Maintenance Yard (PV) Southeast Wastewater (PV/Biogas) Pier 96 (PV) City Distribution Division (PV) University Mound (Small Hydroelectric) Renewable Biogas Energy Our two biogas generation facilities have a generating capacity of three megawatts of clean, renewable energy from the wastewater decomposition process. The facilities are located at our Southeast Wastewater and our Oceanside Wastewater. BIOGAS GENERATION Total Biogas Capacity: 3.1 MW Project Date On-Line Location Output Oceanside Wastewater Great Highway 1 MW Southeast Wastewater Phelps St. 2.1 MW San Andreas San Francisco International Airport (SFO) (PV) The San Francisco Public Utilities Commission is the exclusive power provider on Treasure Island and in the redeveloped Hunter s Point Shipyard.

4 Hetch Hetchy Power Customers Municipal Customers The Hetch Hetchy Power System supplies clean energy to all of San Francisco s municipal buildings, services and customers, which include: SFO, San Francisco General Hospital, MUNI, police, fire, City tenants and more. Wholesale Customers The Raker Act requires that we sell Hetch Hetchy energy to the Modesto and Turlock irrigation districts. Any surplus energy left over after we ve met all of our customer obligations is sold on the Western System Power Pool Market. MUNI buses, trolleys and light rail cars are all zero-emission vehicles because they rely on Hetch Hetchy energy. Even idling planes at SFO are connected to the Hetch Hetchy airport energy network, which ensures planes do not burn fuel and emit greenhouse gas emissions while passengers are boarding. Hetch Hetchy energy is very clean and it s also very cost-effective. We sell energy to General Fund City customers like MUNI at below-cost rates. Without Hetch Hetchy energy, General Fund customers would buy energy from one of the investor-owned utilities, increasing costs for the City by nearly $46 million per year. Hetch Hetchy energy may be hard to see, but it is one of San Francisco s most important and most valuable assets. Retail Customers The San Francisco Public Utilities Commission is the exclusive provider of electricity to residential and business customers in the Hunter s Point Shipyard (Redevelopment Phase I) and on Treasure Island.

5 Clean Energy Initiatives CleanPowerSF, the City s Community Choice Aggregation Program, will provide San Franciscans with an alternative, 100% renewable energy supply while simultaneously building out our own local renewable resources. A product of California s Community Choice Aggregation law, CleanPowerSF enables the City to harness the collective purchasing power of its citizens to buy, and ultimately to generate, green energy for residents and businesses. Energy Efficiency Successes Our Energy Efficiency Division retrofits City facilities to make them more efficient and cost effective. Since 2002, our completed energy efficiency projects are collectively saving the City more than 40,000 megawatt hours annually. At cost of service, that s almost $4 million annually in electricity savings. Renewable Energy Installations Renewable energy facilities in San Francisco are revolutionizing how we generate, distribute and consume energy. In total, we operate 15 solar arrays, two biogas facilities and one small hydroelectric installation. Many more projects are in the pipeline, and we activate new facilities each year. GoSolarSF Solar Incentives To encourage more installations of solar facilities in San Francisco, we offer financial incentives to local residents, businesses and nonprofits that install solar arrays. Since 2008, GoSolarSF has helped install more than six megawatts of solar energy right here in San Francisco. Electric Vehicle Charging Stations The City is expanding its Electric Vehicle (EV) charging station infrastructure. Current and future charging stations will serve customers with clean Hetch Hetchy hydroelectricity. The charging units are monitored for energy usage, fuel savings and greenhouse gas reductions. The energy is available to the public at no cost through Research and Development Our Power Enterprise s Green Test Bed program allows companies to conduct real-world tests of promising new products and services for use in San Francisco. The program benefits our ratepayers by identifying successful technologies for widescale adoption while helping the City to achieve its climate protection goals. Street Lights We own, operate and maintain more than half of the street lights in San Francisco. This diverse portfolio of 25,000 street lights includes the latest LED lights, antique fixtures and much more. Every City street light is a zero-emission street light because Hetch Hetchy energy is the source.

6 The San Francisco Public Utilities Commission provides retail drinking water and wastewater services to San Francisco, wholesale water to three Bay Area counties, and green hydroelectric and solar power to San Francisco s municipal departments. Our mission is to provide our customers with high quality, efficient and reliable water, power and sewer services in a manner that is inclusive of environmental and community interests, and that sustains the resources entrusted to our care. July 2013 Printed on recycled paper.