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Expansion Joints
	Expansion joints on mine tailings pipelines allow for movement and expansion in the pipeline. Because they are made of rubber/plastic materials, much like a hose, they also tend to be electrically poor conductors. Installed typically every 2000 ft along a pipeline, they break up the longitudinal electrical continuity of pipelines and act as natural ELF interference mitigation devices.

Tailings Pumping Station

Tailings pipelines from booster pump building.

Grounding grid being installed under pipelines outside booster pump building. The ground plane formed by the grid minimizes touch voltage problems when unavoidable low level voltages occur on pipelines.

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` Last updated: June 5, 1998.