**UPDATE 2/8/2014 10:30 a.m.**
As of Saturday morning, Duke Energy workers have installed a permanent plug at the end of the wastewater pipe. A company representative says the "concrete-like substance" is curing. To keep pressure off of the plug as it cures, wastewater is still being pumped from the pipe and back into the coal ash pond. Crews are still trying to reach the broken part of the pipe under the ash pond. When they do, they plan to fill the full length of the pipe with the same concrete-like material.
Workers have temporarily stopped the flow of ash and water into the Dan River on the border of North Carolina and Virginia, and plan to permanently patch the leak overnight.