20080915 Ver 1_Noticeof Bridgewater scheduled hydro unit maintenance 9-19-16_20160919

Water strategy,Hydro Ucens4ig,
DUKEand Lake Services
Duke Energy
ENERGY,, 526 S Church Strc,�ek/EC12Y
Chadotle,NC 28202
September 19, 2016
The Honorable Kimberly D. Bose, Secretary
Federal Energy Regulatory Commission
888 First Street, N.E.
Washington, DC 20426
RE: Notification of Scheduled Hydro Unit Maintenance
Catawba-Wateree Hydro Project P-2232
Bridgewater Development
Dear Secretary Bose:
Duke Energy Carolinas, LLC (Duke Energy) is providing advance notification of scheduled
hydro, unit maintenance at the Catawba-Wateree Hydroelectric Project No. P-2232 (Project)
Bridgewater Development.
Duke Energy needs to repair the Bridgewater intake pad stems and the brackets holding the
stems. Two stems are currently bent and the support brackets have pulled away from the wall
they are attached to. This work will restore the stems and brackets to their original working
condition. This repair is scheduled to begin December 5th and last for five days.
The continuous minimum flow from the Bridgewater Powerhouse during this time is normally
145 cubic feet per second (cfs). Because this work has to be done by divers in the immediate
vicinity of the intake Duke Energy must implement the appropriate safety measures to prevent
the units from being operated while divers are in the water. The station is expected to be out of
service from 0630 hours to 1730 hours daily. Outside of these daily work hours continuous
minimum flow from the Bridgewater Powerhouse will be resumed. Also, flow through the
Catawba Dam minimum flow valve will be set to 75 cfs (normal continuous minimum flow
requirement at the Catawba Dam is 75 cfs) during this repair.
This event is addressed under Maintenance and Emergency Protocol Abnormal Condition A.1 —
Schedule Hydro, Unit Maintenance. No Large Water Intake Owners or Downstream Effluent
Dischargers will be impacted. A minimum of 90 cfs is needed at the downstream Morganton
intake, which in the past has been met by the Catawba Dam minimum flow valve release
combined with accretion flows between the powerhouse and the intake. The Lake James
reservoir level will remain within the required Normal Minimum (including any required Low
Inflow Protocol adjustments) to Normal Maximum range. There are no required recreation flow
releases on these dates. North Carolina agencies and the City of Morganton were notified of
this event on September 19, 2016, by copy of this letter and asked if additional consultation is
necessary.

Kimberly Bose
Page 2
September 19, 2016
Please contact Mark Oakley (704-382-5778; mark.oak ley @duke-ever gy.com) or Lynne Dunn
(980-373-1578; [e-mail]) if there are questions or if further information is
needed.
Sincerely,
je
l�
Jeffrey G. Lineberger, PE
Director, Water Strategy& Hydro, Licensing
Duke Energy
Cc Karen Higgins, North Carolina Department of Environmental Quality
Fred Tarver, North Carolina Department of Environmental Quality
Chris GOUdreau, North Carolina Wildlife Resources Commission
Bryan Tompkins, United States Fish and Wildlife Service
Brad Boris, City of Morganton
George Galleher, Duke Energy
Lynne Dunn, Duke Energy
Mark Oakley, Duke Energy
Keith Finley, Duke Energy
Phill Fragapane, DUke Energy
Shannon Todd, Duke Energy