Agenda - Council - 06/27/2017 - Laserfiche WebLink

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SECTION 2641 —STANDARD SPECIFICATIONS FOR PIPELINE REHABILITATION BY PIPE BURSTING 2641.1 DESCRIPTION A General All references to MnDOT Specifications shall mean the latest published edition of the Minnesota Department of Transportation "Standard Specifications for Construction", and all supplements and amendments thereto, published prior to the date of advertisement for bids. This specification shall cover the rehabilitation of existing gravity and pressure utility pipelines using pipe bursting methods. Pipe bursting is a process by which the bursting unit fractures the existing pipe while simultaneously installing a new pipe of the same size or larger size pipe in the place of the existing pipe. Existing lateral and service connections are disconnected prior to mainline pipe bursting to reduce lateral pipe/service pipe damage, then reconnected after testing and disinfection of the new pipe as applicable is approved, television inspection of the new pipe is performed, and the installation is completed in accordance with the contract documents. 2641.2 QUALIFICATIONS The Contractor shall be certified by the particular Pipe Bursting System Manufacturer as a fully trained installer of the pipe bursting system. The Contractor shall provide certifications of training and proficiency in the use of the equipment. Only the Contractor's employees that are trained and certified shall operate the equipment. The Contractor shall have a minimum of five (5) years' experience using the pipe -bursting method proposed and shall have installed no less than 50,000 feet by this method. 2641.3 MATERIALS Pipe materials meet the requirements described in Sections 2611.2 and 2621.2 of these specifications, and as provided in the Special Provisions and the following: 1. Sizes of the new pipe insertions shall be such to renew the pipe mainline to greater than the original flow capacity. 2. All pipe and fittings shall be made of virgin material. No rework except that obtained from the manufacturer's own production of the same formulation shall be used. 3. The pipe shall be homogenous throughout and shall be free of visible cracks, holes, foreign material, blisters, or other deleterious faults. 4. Tensile strength of the pipe shall be in accordance with manufacturer's recommendation for the specified purpose and method of installation. 5. Material color shall be as specified with interior of pipe having a light reflective color to allow for viewing for television inspection. The fused pipe joints shall be de -beaded to reduce collection of sediment and allow a camera to pass during inspection. Page 69