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Overcoming Challenges While Rehabilitating a Corroded Aerial Sewer in a Tidal Marsh

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Following a proactive process of identifying high risk sanitary sewer lines, the Cape Fear Public Utility Authority retained CDM to conduct a condition assessment of a 48-inch aerial gravity sewer located in a tidal marsh. The condition assessment, which included conducting ultrasonic pipe-thickness testing, revealed significant interior and exterior corrosion of the steel pipe. This prompted the need for a fast-track rehabilitation project to avoid any failure, which could have significant environmental impacts. The process of completing construction of this pipeline rehabilitation project within as short a period of time as possible required tenacity and creative thinking, especially given several challenges that arose during construction.

Keywords: Pipeline rehabilitation; condition assessment; cured-in-place lining; pipeline corrosion; ultrasonic testing

Document Type: Research Article


Publication date: 2010-01-01

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