Update: Wednesday, September 30, 2015 at 11:45 a.m.
Current models estimate the diluted discharge will reach Hagerstown, Maryland by October 3 and Harpers Ferry by October 10. Rain may alter the projections. The discharge is expected to continue to flow downstream and become diluted.
Washington's Top News reports the spill is not expected to impact the Washington, DC area's water supply. The full impact of the spill is still being investigated by the Maryland Department of the Environment.