Typical construction durations shown are approximate. Actual duration may vary dependent on existing conditions, site-specific road/traffic conditions, and weather conditions.
For updated current information on when construction will occur in your specific area, please contact the Project Engineer, City of Palo Alto, Water-Gas-Wastewater Engineering.
FAQs for Construction of Capital Improvement Projects
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Wastewater Project Stages per Street Block
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CONSTRUCTION PHASE
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DESCRIPTION
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TYPICAL DURATION
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Site Mobilization
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Contractor moves equipment and material near the construction area or to their storage yard. Contractor marks the boundaries of the area for Underground Service Alert (USA).
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1 - 2 working days
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USA / Survey
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Underground Service Alert (USA) and City Survey Crew marks out existing utilities and proposed wastewater main alignment on the street pavement with spray paint.
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2 - 5 working days
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Sawcutting
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The Contractor sawcuts existing pavement as marked by the survey crew.
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1 - 3 working days
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Potholing
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The Contractor removes the pavement and excavates soil from a small hole to pothole and prepare for the installation of a new wastewater main and services. For open cut, the contractor potholes utilities and other structures to confirm location. For pipe bursting, the contractor potholes all service connections.
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1-3 working days
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New Sewer Main Installation by Open Cut method
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The Contractor excavates and installs pipe at the same time.
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5-9 working days
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New Sewer Main Installation by Pipe-bursting method
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The Contractor installs the new polyethylene sewer main by pipe-bursting method. One pit used for pipe insertion and the other pit is used for the pipe pulling winch.
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2-3 working days
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New Sewer Service Installation, and Existing Services Reconnection
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The Contractor installs the new polyethylene sewer lateral by pipe-bursting method or by open excavation. Existing sewer laterals are reconnected at the main.
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2-5 working days
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Backfilling
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Contractor fills and compacts the ground openings with backfill material as the new main is installed.
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Performed concurrently with the new main and services installation and connection
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Install Temporary Pavement or "Cutback"
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Temporary cold asphalt mix is placed on the backfilled area to temporarily restore the roadway surface. If your street is concrete, steel plates will be placed on top of the trench in order for the concrete base to cure, prior to final restoration.
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Performed after backfilling
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Final Pavement Restoration
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The Contractor removes temporary asphalt pavement, steel plates, and restores pavement and all surface improvements to the preconstruction condition.
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1-3 working days typically done several blocks or sites at a time
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Surface restoration
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The Contractor restores all existing improvements and landscaping at each location to the preconstruction condition.
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After completing the plumbing work at each house location
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Final cleaning
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The Contractor sweeps the street and picks up any residual construction material. USA markings are removed at the end of the project.
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1-2 days per block.
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