In southern Virginia, Danville officials are preparing for the dredging of coal ash from the Dan River.
The city says that Danville Utilities will close the city water treatment plant's intake valve during the day when dredging is occurring. The valve will be open in the evenings and overnight.
Water and wastewater treatment director Barry Dunkley says the change in hours of operation is a matter of exercising caution.
The coal ash has collected near the Schoolfield Dam. It's the result of a February spill upriver in North Carolina at an impoundment owned by Duke Energy.
Dredging could begin late this week.
The city has placed to cameras at Abreu-Grogan Park to allow residents to watch the dredging operation. A live stream will be available at DanRiverCleanup.org