These valves are a critical to the Hetch Hetchy Regional Water System in the Peninsula. As a result, the contractor must replace all three valves in five days in order to put them back into operation by Friday, January 16.
With this limited construction time frame, the contractor will work 24-hour shifts for this five day period. To minimize noise impacts, the contractor will refrain from using loud equipment and back-up alarms after 8 p.m. 24-hour noise monitoring will occur to ensure noise does not exceed the City of South San Francisco’s noise ordinance and construction lighting will be pointed away from homes.
The PPSU project includes the seismic upgrade of three Hetch Hetchy regional water delivery pipelines located in Northern San Mateo County. This project will ensure the pipelines can continue to deliver water to customers after an emergency.
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Outlined above are the construction limits where 24-hour shifts will occur Monday, January 12 through Friday, January 16. The green triangles indicate the location for valve replacement inside the work area.