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C Basin (East Basin) Sewer Rehabilitation

Project Type: 

Sewer Inspection and Cleaning

Project Schedule/Status:

The design process has begun and is expected to continue through Summer 2024.

Project Location:

C Basin covers San Mateo neighborhoods east of Highway 101, including the Shoreview, Harbortown, Mariner’s Isle, Lakeshore and Los Prados neighborhoods (see map).

Project Description

San Mateo’s stormwater and wastewater collection system includes a network of 240 miles of pipeline divided into five major sewer basins. The City’s Public Works Department (PWD) performs thorough condition assessments of the sewer system, tracks the condition of the system, and performs routine maintenance of the pipes.
A condition assessment is the first step toward finding cost-effective and technically feasible fixes to minimize inflow and infiltration.

Video inspections are conducted using a remote-controlled camera, to help the City check the condition of the pipes, obtain information that will enable the City to identify problem areas, and plan for future rehabilitation and repair, such as spot repairs, lateral repairs, pipe lining, segment repairs, manhole repairs, etc.

The C Basin Sewer Rehabilitation project includes cleaning and video inspection of:

  • Approximately 37,500 linear feet of pipe in the public right-of-way
  • Approximately 118,000 linear feet in easements on private property,
  • Approximately 330 manholes in the public right-of-way and 460 manholes in easements on private property

Repairs and replacements are needed to maintain the proper operation of the system, to meet regulatory requirements, and to prevent sewer overflows.

Presidio Systems, Inc. has been hired by the City to conduct the cleaning and video inspection. Work is scheduled to occur between 7:30AM and 4:30PM, Monday through Friday. On occasion, weekend work may be required. Affected residents and business owners will receive advance notice about the work.

Map of Basin C

Engineer Firm Name and Key Project Contact: 

Engineer Consultant: Schaaf & Wheeler Project Manager, Ben Shick, 707-528-4848
Contractor: Presidio Systems Inc. Project Manager, Alex Negrete, 925-683-4837
City/CWP Project Manager: Laura Webb, 650-522-7322,