Laserfiche WebLink
Port Gardner Storage Facility - Facility Construction Package Bypassing and Dewatering <br />Project No. 157889 33 01 30.50 - 4 <br /> <br />largest pump in the system, piped, plumbed and ready for operation. Standby <br />pumps shall be fueled and operational at all times. <br />c. The Contractor shall maintain on site a sufficient number of valves, tees, elbows, <br />connections, tools, sewer plugs, piping, hoses and other parts of system <br />hardware to ensure immediate repair or modification of any part of the system as <br />necessary. <br />C. Criterion 2 - Bypass Pumping System with flows greater than 2.5 MGD <br />1. In addition to the requirements identified under Criterion 1, Contractor shall design <br />construct, operate and maintain the bypass system specified herein: <br />a. All bypass piping shall be fused HDPE piping. <br />D. The bypass piping system shall include multiple pipelines to convey 150% of the <br />maximum anticipated flow (as determined by the Contractor). A minimum of one <br />additional (spare) pipeline will be constructed and plumbed for immediate operation that <br />is equal in diameter to the largest pipe size in use for the bypass setup. All other <br />requirements shall be the same as identified under Criterion 1 of these specifications. <br />2.02 BYPASS PUMPING AND FLOW CONTROL PLAN <br />A. The actual design of the bypass arrangement and alignment shall be prepared by the <br />Contractor. The Contractor shall prepare and submit a project specific Bypass Pumping <br />and Flow Control Plan (Bypass Plan) for review and approval by the CONSTRUCTION <br />MANAGER. <br />B. Approval of the Bypass Plan shall in no way relieve the Contractor of their responsibility <br />for the protection of adjacent properties, downstream drainage systems and water <br />tributaries against sewage spill. Any litigation, claims, fines, etc. associated with any <br />sewage spill shall be the responsibility of the Contractor. <br />C. Bypass operations shall be incorporated into Traffic Control Plan(s) submitted for review <br />and approval by the government agency with jurisdiction of the right-of-way. <br />D. The Bypass Pumping and Flow Control Plan(s) shall include, but not be limited to, the <br />following: <br />1. Flow monitoring data, location of monitoring and design calculations for flow <br />diversions. <br />2. A summary of flow to be bypassed including measured flows and any flows diverted. <br />3. Drawings indicating the scheme and location of pumps, suction piping, discharge <br />piping, and temporary sewer plugs for each of the project sites <br />4. Capacities and sizes of pumps, standby equipment, and power requirements if <br />applicable. <br />5. Design calculations proving adequacy of the system and selected equipment, <br />including static lift, friction losses, fitting losses, flow velocity, pump curves showing <br />operating range, suction pipe, and discharge pipe (thickness calculations in <br />conjunction with pavement ramp details assuming an HS20 live loading). <br />6. Suction and discharge locations including any new manholes proposed by the <br />Contractor. <br />7. Sewer plugging method and type of plug.