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City of Bellevue, WA Utilities
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  4. Utilities
  5. Utilities Projects, Plans and Standards
  6. Utilities Codes and Standards
  7. Side Sewer Permit Conditions
  8. Relining Side Sewers

    Side Sewer Permit Conditions

    • Pipe Bursting
    • Relining Side Sewers
    • Side Sewer As-built Inspection

    Relining Side Sewers

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    Project Banner 6-20-17.jpg

    Relining Private Side Sewers and Storm Drain Pipes

    Supplemental Conditions - Revised December 6, 2018

    General

    See Side Sewer General Conditions

    The contractor performing the proposed rehabilitation work shall have a current license agreement with the product manufacturer/assembler and shall have such license available to the utilities inspector. Additionally, the individuals performing the rehab work shall be certified by the product manufacturer/assembler.

    Since the Owner is opting to use trenchless methods to rehabilitate the existing pipe, it is not possible to make significant adjustments in line and grade. Owner accepts the fact the pipe may have less than minimum pipe slope and that there may be swales in the pipe grade. These deficiencies may require more frequent pipeline maintenance by the Owner.

    Materials

    Pipes on Private Property

    Pipe lining materials for side sewers and storm drains must conform to current ASTM F1216, Standard Practice for Rehabilitation of Existing Pipelines and Conduit by Inversion and Curing of a Resin-Impregnated Tube. Pipe lining installation shall be in accordance with the requirements of the product manufacturer/assembler and as directed by their technical representatives.

    Prior to pipe rehab work, the existing (host) pipe must be cleaned, root cut, jetted, rodded and/or otherwise cleaned to a condition that allows for rehab work to be effective per the manufacturer’s recommendations.

    Required Inspections

    1. The contractor shall request all inspections that apply to work being performed prior to backfilling, including by not limited to fitting and connections and clean-outs.
    2. A CCTV video inspection of the host pipe after cleaning operations shall be made. A copy of the CCTV inspection shall be provided to the inspector on a USB at final inspection.
    3. The contractor shall demonstrate to the utilities inspector via the live video inspection that the pipe liner does not protrude into the city’s lateral (6-inch diameter), main or joint use pipe after completion of the work. If the pipe liner does protrude into the city’s lateral, main or joint use pipe, the contractor shall trim the protrusion flush with surface, or otherwise eliminate the protrusion. If the utilities inspector is unable to verify that the pipe liner does not protrude into the main or joint use pipe, the contractor shall video inspect the main or joint use pipe so that an affirmative determination can be made.
    4. The contractor shall update the as-built drawing for the property with the location of the beginning and end of the liner and any new appurtenances added (e.g., a clean out to grade).The updated as-built drawing shall be provided to the inspector at the final inspection.
    5. For deficiencies (e.g., ponding, constrictions, kinks and wrinkles), the contractor shall make the Owner aware of the deficiencies and the risks they pose. A written copy of such notification shall be provided to the inspector at the final inspection.

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