Costs for Water Supply Distribution System Rehabilitation (EPA/600/JA-02/406) 2002
A major challenge for society in the twenty-first century will be the design, rehabilitation, replacement, and optimal management of drinking water distribution systems. A recent survey conducted by EPA found that $138 billion will be needed to maintain and replace existing drinking water systems over the next 20 years. It is estimated that $77 billion of this expenditure will be dedicated to repairing and rehabilitating pipelines.
Given the cost and disruption caused by replacing distribution system pipe using conventional open-trench technology, utilities are beginning to increase the application of rehabilitation or trenchless replacement technologies to extend the life of existing pipes.
This paper presents cost models and representative costs that can be used by utility managers to estimate rehabilitation and replacement costs for distribution system pipelines. It should be noted that these cost models and representative costs are intended to be used for comparing costs between various rehabilitation and replacement technologies and not for estimating construction costs.
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