20030147 Ver 2_Other Documents_20160511

//�DUKE
ENERGY.
May 11, 2016
The Honorable Kimberly D. Bose, Secretary
Federal Energy Regulatory Commission
888 First Street N.E.
Washington, DC 20426
Re: Duke Energy Progress, LLC
Yadkin -Pee Dee Hydroelectric Project No. 2206
Article 401(C) Notification of Planned Deviation
Dear Secretary Bose:
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Duke Energy Corporation
526 South Church Street
EC12Y
Charlotte, NC 28202
Duke Energy Progress, LLC (Duke Energy) is required by Article 401(C) of the New License for
the Yadkin -Pee Dee Hydroelectric Project (Project) issued by the Federal Energy Regulatory
Commission (Commission) on April 1, 2015, to provide notification of planned and unplanned
deviations from license requirements. This letter will serve as notification of a potential for a
deviation from the minimum flow requirement for the Blewett Falls Development on May 23
and again on June 10, 2016.
Duke Energy is in the process of automating operation of the Blewett Falls Development which
requires upgrading the transmission relay system for Units 1, 2 and 3. The relay upgrade will
take place over the May 23 - June 10 timeframe and initially requires the station to be taken out
of service for approximately ten hours on May 23rd to complete the lock -out tag -out (LOTO)
procedure necessary to safely perform the work.
Because the minimum flow for the Blewett Falls Development is provided with generation,
shutting down the entire station would normally result in a minimum flow of only leakage as
opposed to the 1800 cfs required by the New License (May 16 - May 31); however, Duke Energy
plans to operate the Tillery Station upstream of Blewett Falls in such a way that the minimum
flow for Blewett Falls will be provided with spilling over the Blewett Falls Spillway. The ability
to accomplish this will depend on the availability of storage in Lake Tillery which we currently
anticipate to be sufficient for providing the flow.
After the ten-hour station outage on May 23rd, Units 4, 5 and 6 will be returned to service and the
minimum flow will be restored with generation. Another station outage will be required on June
10th for approximately eight hours to return the transmission relay for Units 1, 2 and 3 to service.
Again, to provide the minimum flow for Blewett Falls during the station outage, Duke Energy

May 11, 2016
Kimberly D. Bose, Secretary
Page 2
plans to operate the Tillery Station such that the minimum flow for Blewett Falls will be
provided over the spillway.
Duke Energy is providing this notification to the Commission of the potential for a deviation
from the minimum flow requirement at Blewett Falls should unforeseen circumstances prevent
the operation at the Tillery Station necessary to provide flow to spill the minimum flow of 1800
cfs from the Blewett Falls Spillway. Upon completion of the station outages, Duke Energy will
notify the Commission as required by Article 401(C) of the New License as to whether or not a
deviation from the minimum flow occurred during either the May 23rd or June 10th outage.
Please contact Tami Styer at [phone] (Tami.StyerLduke-energy.com) if you have
questions or required additional information.
Sincerely,
Jeffrey G. Lineberger, P.E.
Director, Water Strategy and Hydro Licensing
Duke Energy
cc: Chris Goudreau — NC Wildlife Resources Commission
John Ellis — US Fish and Wildlife Service
Fred Tarver — NC Department of Environmental Quality
Karen Higgins — NC Division of Water Resources
Fritz Rohde —National Marine Fisheries Service
Dick Christie — SC Department of Natural Resources
Heather Preston — SC Department of Environmental Control
Tami Styer — Duke Energy
Phil Fragapane— Duke Energy
George Galleher— Duke Energy
Lynne Dunn— Duke Energy
David Scott— Duke Energy