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• W4244720472 abstract "Water systems are complex and dynamic, in most cases growing over time with the communities they support. Over decades, water towers rise, pipelines extend, and new materials and technologies come into service. Water systems take on the attributes of the periods in which they were constructed, with the layers through neighborhoods and districts telling the story of age like rings on a tree. Because water infrastructure lasts a long time, managing the hodgepodge of different pipes, pumps, meters, and plants typically ranging in age from five to 95 years is a significant undertaking. To protect public health and maintain service levels, water professionals must understand the current and future states of water infrastructure. This is not straightforward because physical assets exist in varying states of usefulness as a result of differing materials of construction, methods of installation, water quality changes, local soil conditions, extreme weather conditions, and inspection and maintenance schedules, among other things. Because of highly variable infrastructure age, utilities commonly estimate how much useful life their particular assets still have. “Useful life” refers to the amount of time an asset can effectively remain in service, and it can be estimated on the basis of a series of underlying assumptions or actual condition assessments. The useful lives of water works are limited by obsolescence (uncommon) and deterioration (typical). Besides the damage from catastrophic failures like big pipe leaks and dam breaks, failing water infrastructure most often leads to wasted water, energy, utility resources, and loss of public trust. It's more expensive to perform an unscheduled repair as compared with a coordinated replacement, so understanding useful life distributions helps utility managers make informed decisions and plan for system maintenance, renewal, and replacement. Based on past system investment and expansion in North America, many systems face the prospect that a significant percentage of their critical assets are approaching the end of their useful lives. If action is not deferred, these systems will require some sort of investment either as renewal to extend their useful lives or outright replacement to start the clock over from zero again. Like infrastructure, those who work in water have useful lives, too. Utility employees, consultants, manufacturers, regulators, and researchers can have useful lives up to 50 years or more. Similar to a utility's physical assets, the useful lives of its people depend on the conditions in which they operate and the investments in their maintenance and improvement—meaning, when a utility invests in its pipes, pumps, plants, and people, it will be happier and more productive for longer. Given this, it's important that the water industry ensure that its workforce is healthy, resilient to adversity, and flexible to adapt with the systems they design, operate, and oversee. How can we understand the useful lives of water works and water professionals? There are many service-life prediction models for physical assets, but I'm not aware of such a model for water industry professionals. However, it stands to reason that their useful lives will fall at the lower end of expectations if they are in poor condition to start with, have not been properly maintained, or regularly operate under challenging circumstances. Overall, managers should regularly conduct condition-assessments to determine the likelihood of failure or retirement, and with this information, invest where needed and hopefully circumvent critical events before they occur." @default.
• W4244720472 created "2022-05-12" @default.
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• W4244720472 date "2019-07-01" @default.
• W4244720472 modified "2023-10-16" @default.
• W4244720472 title "Useful Lives" @default.
• W4244720472 doi "https://doi.org/10.1002/awwa.1317" @default.
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