San Francisco, USA Completes Renovation of 10.8 km Water Supply Network and Sewer System

en.Wedoany.com Reported - On November 9, the San Francisco Public Utilities Commission in California, USA announced that Phase 2 of the Geary Boulevard Water Supply and Sewer Network Renovation Project was completed ahead of schedule. The project was launched in January 2025, covering the stretch from 32nd Avenue to Stanyan Street. A total of more than 10.8 km of water supply pipelines were installed and replaced, approximately 2.25 km of sewer pipes were replaced or rehabilitated, and about 2.4 km of underground fiber optic conduit was laid.

The water supply system renovation was one of the main components of the project. The work included replacing more than 6.7 miles of aging water supply pipelines, including one 16-inch transmission main and two 8-inch distribution mains. The new pipelines will improve water pressure, flow, and supply reliability for residents and commercial facilities along the route, while also meeting firefighting water demand.

The project replaced or rehabilitated approximately 1.4 miles of sewer mains and constructed new supporting sewer network structures. Some underground water supply and sewer facilities in San Francisco are over 100 years old, and aging pipes have increased the risk of system failures, sewage backups, and localized flooding. This renovation, by updating underground pipelines and related facilities, expands sewage conveyance capacity and reduces the risk of sewage backups and flooding in residential and commercial areas.

The project also laid approximately 1.5 miles of underground fiber optic conduit in parallel, providing infrastructure for subsequent traffic signal system upgrades. Construction covered 35 blocks along the route, and roadways and sidewalks have also been restored accordingly. This portion of fiber optic conduit was built as part of the project's ancillary works and is not the main component of the water supply and sewer network project.

The contractor divided the route into multiple work zones and arranged different construction crews to simultaneously carry out pipe replacement, connections, and road restoration. The San Francisco Public Utilities Commission also scheduled some water service connection work at night to reduce the impact of daytime construction on normal water use by businesses and residents along the street. Through segmented construction and multi-workface parallel organization, the underground pipeline project was completed in less than two years, ahead of the original overall construction schedule.

After completion of the underground pipeline project, surface traffic improvement tasks remain along Geary Boulevard. The San Francisco Municipal Transportation Agency will subsequently implement bus stop and sidewalk extensions, pedestrian safety island construction, traffic signal upgrades, and road repaving, with related work expected to continue until early 2028. Therefore, the scope of this completion only includes water supply, sewer, and related underground facilities, and does not mean that the entire comprehensive road improvement project has been fully completed.

This project is Phase 2 of San Francisco's phased Geary Boulevard infrastructure renewal plan. Phase 1 was completed in 2021, and Phase 2 further covers the section from 32nd Avenue to Stanyan Street, focusing on renewing aging water supply and sewer facilities.