NC0004961_S16-005_20200408

DUKE
ENERGY. James Wells
Vice President
Environmental,Health&Safety
Programs and Environmental Sciences
526 South Church Street
Mail Code EC13K
Charlotte, NC 28202
[phone]
April 8, 2020
Via Overnight Mail
Corey Basinger
Mooresville Regional Supervisor
North Carolina Department of Environmental Quality RECEIVED
Division of Water Resources
Regional Water Quality Operations Section APR 15 2020
601 East Center Avenue, Suite 301
Mooresville, NC 28115 NCDEO/DWR/NPDES
Bob Sledge
North Carolina Department of Environmental Quality
Water Quality Permitting Program
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Report Under Special Order by Consent -SOC No. S16-005
Duke Energy Carolinas, LLC - Riverbend Steam Station
NPDES Permit NC0004961
Dear Mr. Basinger and Mr. Sledge:
On behalf of Duke Energy Carolinas, LLC ("DEC"), I am submitting to you the Riverbend Steam
Station Progress Report summarizing the work and activities undertaken with respect to closure
of coal ash surface impoundments as required by the Riverbend Steam Station NPDES Permit
NC0004961 Special Order by Consent ("SOC"), SOC No. S16-005 Section 2. d.
As required by the SOC, I certify under penalty of law that this document and all attachments
were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted. Based
on my inquiry of the person or persons who manage the system, or those persons directly
responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant
penalties for submitting false information, including the possibility of fine and imprisonment for
knowing violations.

Mr. Corey Basinger and Mr. Bob Sledge
April 8, 2020
Page 2
Please direct any questions concerning the Riverbend Steam Station NPDES Permit
NC0004961 SOC No. S16-005 to Brad Loveland at [phone].
Sincerely,
Jam s Wells
Vice resident, Environment, Hea & Safety-
Programs and Environmental Scienc s
Duke Energy
CC: Richard Baker, Duke Energy
Brad Loveland, Duke Energy
Rick Massey, Duke Energy
George Hamrick, Duke Energy
Paul Draovitch, Duke Energy
Matt Hanchey, Duke Energy
Randy Hart, Duke Energy

NPDES PERMIT NC0004961
SPECIAL ORDER BY CONSENT EMC SOC WQ S16-005
QUARTERLY EXCAVATION PROGRESS REPORT
RIVERBEND STEAM STATION
April 8, 2020

I. Background and Summary
On November 10, 2016, Duke Energy Carolinas, LLC (DEC) and the North Carolina
Environmental Management Commission entered into Special Order by Consent — EMC SOC
WQ S16-005 (SOC) applicable to the Riverbend Steam Station (Riverbend). This report is
submitted in accordance with paragraph 2.d of the SOC. In compliance with Section 2.d., this
report summarizes the work and activities undertaken with respect to decanting work and closure
of coal ash surface impoundments at Riverbend. The quarterly reports are due no later than the
last day of January, April, July, and October for the duration of the SOC.
A. Riverbend Steam Station Closure Summary
Riverbend is located off Horseshoe Bend Beach Road near the town of Mt. Holly in Gaston
County, North Carolina, on the south bank of the Catawba River. The site originally contained
two ash basins, as well as the Dry Ash Stack and the Cinder Pit.
As of March 16, 2019, Riverbend has completed excavation and removal of CCR materials
from CCR impoundments at the Station. During the period of November 1, 2018 to March 16,
2019, a total of 412,256 tons of ash was excavated from the basins, ash stack, and cinder pit and
transported to the Brickhaven Structural Fill site in Chatham County, NC. A cumulative total of
5,351,308 tons of ash has been removed from the site.
Duke Energy received a letter from NCDEQ dated July 25, 2019 confirming completion of
the required ash excavation at Riverbend under the North Carolina Coal Ash Management Act.
Final impoundment closure activities, including regulatory approval of decommissioning of the
Primary and Secondary Dams, are still pending.
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