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Innovative Condition Assessment and Phased Planning of Rehabilitation Work of a Main Trunk Sewer

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The 12-mile long Magnolia Trunk Sewer (MTS) located in Orange County California was constructed in the 1950s with PVC-lined reinforced concrete pipe (RCP) and vitrified clay pipe (VCP) ranging from 39-inch to 78-inch diameter. The primary damage to the MTS was from concrete corrosion due to sewer gases and sulfuric acid formation within the pipeline. The PVC-lined RCP pipeline was inspected using closed circuit television (CCTV) and physical man entry. Individual damages were documented and classified using the National Association of Sewer Service Companies (NASSCO) Pipeline Assessment and Certification Program (PACP) system (NASSCO, 2008). The challenge was to extend the observed damage data points to entire sections of pipe and thereby realize a comprehensive condition assessment of the MTS. This would serve to prepare a corresponding Rehabilitation Plan and Contract Packages.
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Document Type: Research Article

Publication date: 2008-01-01

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