Jan. 2. NC regulators, community groups and Duke Energy have agreed to a plan to permanently close the company’s remaining nine coal ash basins in the state, primarily by excavation with ash moved to lined landfills over the course of 10 to 15 years.

The agreement is a “reasonable and prudent” plan for basin closure, Duke Energy said in a press release. The parties include Duke, NC Department of Environmental Quality (NCDEQ) and groups represented by the Southern Environmental Law Center (SELC).

The deal is expected to protect people and the environment “with a keen focus on investing for the future and our shared clean energy vision.”

The total undiscounted cost to permanently close all ash basins in the Carolinas is now approximately $8 billion to $9 billion, of which approximately $2.4 billion has been spent through 2019.

It’s apparently the most extensive coal ash cleanup in the nation​.​

Under the agreement, seven of the basins will be excavated, with ash moved to lined landfills, including two at the Allen Steam Station in Belmont; one at Belews Creek Steam Station; one at Mayo Plant in Roxboro; one basin at the Roxboro Plant in Semora; and two at the Cliffside/Rogers Energy Complex in Mooresboro.

At the Marshall Steam Station in Terrell and the Roxboro Plant, uncapped basin ash will be excavated and moved to lined landfills. At both locations, sections of the basins were filled with ash in the past. To make use of that space, state permitted facilities, including existing lined landfills, were built on top of those portions of the ash basins.

Because the ash underneath is already covered, that material will not be disturbed and will be monitored and safely closed under other state regulations.

Under the plan, almost 80 million tons of ash will be excavated from the remaining sites. The company is already removing ash from basins at other facilities, bringing the total amount of material to be excavated in North Carolina to approximately 124 million tons.

The agreement calls for expedited state permit approvals, with excavation at the six sites completed in 10 to 15 years.

Cost

This plan will reduce the total estimated cost to close the nine basins by about $1.5 billion, as compared to the April 1, 2019 NCDEQ order requiring full excavation. As a result, the estimated total undiscounted cost to permanently close all ash basins in the Carolinas is now approximately $8 billion to $9 billion, of which approximately $2.4 billion has been spent through 2019. Most of the remaining expenditures are expected to occur over the next 15-20 years.

Protecting groundwater

The agreement also ensures that impacted groundwater is addressed and includes provisions to streamline the process for this important work. Drinking and recreational water supplies are safe now, and Corrective Action Plans will address groundwater at each site to ensure those supplies remain protected.

At Roxboro and Marshall, for example, Duke Energy will install specialized wells and other technology at specific locations to ensure that groundwater conditions improve and comply with standards by 2029, assuming plans are expeditiously approved by the state.

Promoting recycling

Duke Energy is closing all of its coal ash basins, including 31 in North Carolina. Basin excavation is completed or nearly completed at 10 basins at the Asheville Plant, Dan River Plant (Eden), Riverbend Steam Station (Mt. Holly), Sutton Plant (Wilmington), Weatherspoon Plant (Lumberton) and one basin at the Rogers Energy Complex. That material is being recycled or disposed of in lined landfills.

Material from 12 basins at Buck Steam Station (Salisbury), HF Lee Plant (Goldsboro) and Cape Fear Plant (Moncure) will be reprocessed and recycled into useful construction material. Recognizing that recycling is the only way to avoid permanent disposal of ash, the parties agree to explore opportunities to maximize recycling at those sites by extending closure deadlines to 2035.

Resolves litigation

The agreement completely resolves the pending disputes over ash basin closure plans being debated by the parties in various courts, including cases before the North Carolina Office of Administrative Hearings, North Carolina Superior Court and United States District Court for the Middle District of North Carolina. The parties will make the necessary court filings to dismiss each case.

Brandon Jones, Catawba Riverkeeper at the Catawba Riverkeeper Foundation, said:

“This settlement is a fantastic victory for the Catawba and all North Carolinians and a major step towards protecting water quality for current and future generations. This is one of, if not the largest coal ash cleanup in American history. We are proud to have been a part of this effort from the beginning.”