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Our Water Enterprise manages a complex water supply system stretching from the Sierra Nevada Mountains to San Francisco. As sound stewards of this engineering marvel in our care, we never stop maintaining and upgrading it.
The Water System Improvement Program (WSIP) is a $4.8 billion dollar, multi-year capital program to upgrade the SFPUC's regional and local water systems. The program repairs, replaces, and seismically upgrades crucial portions of the Hetch Hetchy Regional Water System.
The program consists of 87 projects - 35 local projects located within San Francisco and 52 regional projects, spread over seven counties from the Sierra foothills to San Francisco. The San Francisco portion of the program is 100% complete as of October 2020. The Regional Portion is approximately 99% complete. The current forecasted date to complete the overall WSIP is May 2023.
Although we have upgraded major portions of it through our Water System Improvement Program, we must continue to maintain and upgrade this complicated system in order to continue meeting our Level of Service Goals. The planning, design, and construction of these projects are included within the Local (San Francisco) and Regional 10-year Water Enterprise Capital Improvement Programs.
The Regional Water System consists of water treatment facilities; water transmission infrastructure; and watersheds and Rights-of-Way lands in San Mateo, Santa Clara, and Alameda Counties as well as western San Joaquin County.
The Local (San Francisco) Water System consists of water storage, treatment, and pumping facilities; water transmission and distribution infrastructure; and various lands in the City and County of San Francisco. Groundwater in San Francisco is under the jurisdiction of the SFPUC.
We update these 10-Year Capital Improvement Programs every year and integrate these plans with our Financial Plan and rate-setting. Projects within this program are in all project phases: conceptual, design, planning, and construction.
Our Water Enterprise’s Hetch Hetchy Water and Power (HHWP) Division is responsible for operating, managing, and maintaining the HHWP system and facilities. This includes water facilities from Hetch Hetchy Reservoir, located in Yosemite National Park, to Alameda East Portal, located in Sunol Valley and power facilities located from Early Intake (in the Sierra Nevada) to Newark.
The Hetch Hetchy Capital Improvement Projects (HCIP) are a multi-year group of capital projects to upgrade existing, aging infrastructure within the system operated by HHWP so that it will meet the challenges of today and the future.
Projects within this program are in all project phases: conceptual, design, planning, and construction.
A condition assessment of the 14 bridges in the care of Hetch Hetchy Water and Power Division identified needed modifications and/or replacements. The current plan includes funding for work two of the bridges: O'Shaughnessy Adit Access Bridge and Lake Eleanor Dam Bridge.
The Moccasin Penstock conveys Hetch Hetchy water from Moccasin Tunnel to the Moccasin Powerhouse. This project enhances the reliability of the penstock system through the repair and replacement of the more than 96 year-old sections of the penstock, replacement of cracked concrete anchors and saddles, and upgrades to make the pipes easier to maintain in the future.
We are replacing four large diameter butterfly valves inside the Tesla Valve Vault.
Expected Completion Date:
December 2023 Phase 3
Hetch Hetchy Regional Water System
Two unique features of this system stand out: the drinking water is among the purest in the world; and delivery system of that water is almost entirely gravity fed, requiring almost no fossil fuel consumption to move water from the mountains to your tap.