WASHINGTON (AP) — One of the nation's largest coal producers will pay a $27.5 million fine and is set to spend $200 million to reduce illegal toxic discharges into waterways across five Appalachian states.

The proposed settlement is the largest ever of its kind.

The Associated Press obtained details before the settlement involving Alpha Natural Resources Inc. was filed in court in West Virginia.

The government says the company and its subsidiaries violated water pollution limits in state-issued permits more than 6,000 times between 2006 and 2013.

The government says they discharged heavy metals harmful to fish and other wildlife directly into rivers and streams.

The companies agreed to take measures to reduce discharges from 79 active coal mines and 25 processing plants in Kentucky, West Virginia, Tennessee, Pennsylvania and Virginia.