| http://www.w3.org/ns/prov#value | - Although they are out of sight and out of mind except when they spring a leak, water and sewer systems are more vital to civilized society than any other aspect of infrastructure. ???Infrastructure??? refers to the pipes, treatment plants, pumps, valves, water storage tanks, hydrants, and other critical components that deliver safe drinking water to our taps, support fire and emergency services, r
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