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City of Everett 01 12 16 - 7 <br />Port Gardner Storage Facility - Facility Construction Package WO# UP-3525 <br /> <br /> <br />01 12 16 - 7 WORK SEQUENCE <br />b. Decommissioning of the existing stormwater conveyance system either <br />stepwise, or in its entirety to the Swale Pump Station, will be required with <br />construction progression. Proper stormwater capture and conveyance is <br />required at all times during construction and cannot have interruptions. It is <br />advised that the Contractor may choose to demolish and install existing and <br />proposed storm sewer in tandem with one another and from north to south to <br />ensure that stormwater enters a convenance system at all times. Always <br />protect existing and proposed catch basins from sedimentation during <br />construction. If necessary, the Contractor may choose to install a temporary lift <br />station or pump at CSMH-46-01 in order to reach Lift Station 6 or 7 if Lift <br />Station 46 is not yet fully commissioned. <br />c. See EXHIBIT A – SECTION 01 12 16 for further limitations and possibilities for <br />dewatering water (storm, sewer, groundwater dewatering) handling. <br />d. The existing sewer main serving the Navy facilities to the west crosses <br />through the PGSF site. A portion of this main must be re-routed as shown on <br />the plans; the remainder must be abandoned in the vicinity of Lift Station 46. <br />The Contractor shall provide temporary by-pass piping or protect the existing <br />sewer main at Lift Station 46 until Lift Station 46 and the re-routed sewer main <br />is fully operational so sewer flow from Naval Station Everett is uninterrupted. <br />See EXHIBIT A – SECTION 01 12 16 for further limitations and possibilities for <br />dewatering water (storm, sewer, groundwater dewatering) handling. <br />10. Offsite disposal of excavated soil shall be as described in Section 02 61 00 and <br />Section 31 23 00. <br />11. Coordinate with Snohomish County Public Utility District (SnoPUD) for work below <br />and within 25-feet of overhead power lines. Follow minimum clearances per <br />Washington Administrative Code (WAC). <br />a. Weather depending, de-energizing 115 kVA power lines may be possible for <br />up to three weeks. Request to de-energize shall be coordinated with the <br />Owner and SnoPUD. SnoPUD reserves the right to energize the lines <br />anytime. <br />b. Owner will coordinate and reimburse SnoPUD for pole holding and on-site <br />witness and inspection activities resulting from work around 115 kVA power <br />lines. Reimbursement does not include work and restrictions related to <br />electrical permits. <br />12. Demolition of Lift Station 6 must include transition of local sewer flows to Lift Station <br />7 or Lift Station 46 prior to decommissioning and demolition of Lift Station 6 and <br />related utilities. Transition of lift stations must not result in any interruption of regular <br />service. <br />13. Area 25: Existing pipes identified on Drawings D-25-3001 and D-25-9001 must be <br />hydrostatically tested, as specified on the Drawings, prior to the start of site <br />construction activities.