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October 27, 2001 Ewe-Leng Lim, P.E. RESEARCH STATEMENT As the country’s pipeline infrastructure ages, it becomes increasingly challenging to assign limited capital resources to prioritize the repair, replacement, or rehabilitation of these assets. This applies to water, sewer, gas, or any other pipelines system in the country. There is a growing need by municipalities to find better ways to prioritize their future projects. Much research has gone into the process of pipeline distribution system rehabilitation planning. The American Water Works Association (AWWA), American Society of Civil Engineers (ASCE), and other professional associations have produced numerous publications on the subject. Results and recommendations from these studies have been adopted by Utilities in varying degrees. Most Utilities have adopted some form of subjective ranking system to prioritize pipeline rehabilitation. A smaller number of Utilities have completed regional statistical analyses to predict pipeline failure and incorporate the results within a cost-benefit analysis.  Ewe-Leng Lim.pdf
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