20080915 Ver 1_Notice of Deviation for Min Cont Flow Email_20160805

Higgins, Karen
From: Bruce, Ed <[e-mail]>
Sent: Friday, August 05, 2016 1:48 PM
To: Goudreau, Chris J.; Bryan Tompkins; Tarver, Fred; Higgins, Karen
Cc: Oakley, Mark; Finley, Keith A; Lineberger, Jeff
Subject: FW: Notification of Deviation from Min Continuours Flow for Lookout Shoals
Attachments: LS Notification of Deviation from Min Cont Flow.pdf
r ef incident of eviation from the Minimum Continuous Flow requirement for the Lookout Shoals Development of th,"A
. . One of the auxiliary units that normally provides the
continuous minimum flow tripped offline and one of the larger units was quickly brought online. There was a period o
about six minutes where the flow was less than the minimum required flow. It should be noted once the larger unit w
fully online, the downstream flow was much larger than the continuous minimum required flow. I
Duke Energy
526 S. Church St., Mail Code EC12Y
Charlotte, NC 28202
704-382-5239 (Office)
704-607-3734 (Cell)
From: Hammond, Tamela J
Sent: Friday, August 05, 2016 1:37 PM
To: chris.goudreauCa)ncwildlife.org; Fred Tarver (fred.tarver(a)ncdenr.gov); bryan tompkins(a)fws.gov
Cc: Bruce, Ed; Fragapane, Phil
Subject: Notification of Devaition from Min Continuours Flow for Lookout Shoals
DUKE
Ec`,

(o DUKE
ENERGY
August 5, 2016
The Honorable Kimberly D. Bose, Secretary
Federal Energy Regulatory Commission
888 First Street, N.E.
Washington, DC 20426
RE: Notification of Deviation from Minimum Continuous Flow
Catawba-Wateree Hydro Project P-2232
Lookout Shoals Development
Dear Secretary Bose:
Water Strategy, Hydro Licensing,
and Lake Services
Duke Energy
526 S Church Street / EC12Y
Charlotte, NC 28202
Duke Energy Carolinas, LLC (Duke Energy) is providing notification of a deviation from
the Minimum Continuous Flow in accordance with Article 401 of the Federal Energy
Regulatory Commission (Commission) License for the Catawba-Wateree Hydro Project
(Project) issued November 25, 2015. According to the License Appendix E, A-2.0, the
year-round required Minimum Continuous Flow from the Lookout Shoals Development
is 80 cubic feet per second (cfs).
On August 1, 2016, at 1950 hours, the operator in Duke Energy's Regulated Renewable
Operations Center (RBOC) received an alert from Lookout Shoals Hydro Station
indicating the minimum flow unit in use at that time had tripped offline and shut down.
The operator started a larger hydro unit to provide the minimum continuous flow and
called the on-call technician for Lookout Shoals to report the alert. The on-call
technician reported to the site and found the minimum flow unit tripped due to a bad
analog output card which was causing erratic wicket gate positioning. The technician
replaced the card; the unit was tested and was put back online at 2230 hours. The time
between the unit trip and the start of the larger hydro unit resulted in an estimated six -
minute period during which the Minimum Continuous Flow was not met (see Enclosure
1). Note for a larger hydro unit, it takes three to five minutes for the unit to come online
and be fully synchronized with the Duke Energy electrical grid.
The above-described event is being reported under the Maintenance and Emergency
Protocol (MEP) Abnormal Condition B.2 — Maintenance of the Normal Means of
Providing Minimum Flows (Unscheduled). No adverse environmental impacts were
observed or reported as a result of this short -duration incident, and no downstream

The Honorable Kimberly D. Bose, Secretary
August 5, 2016
Page 2
Large Water Intake owners or downstream Effluent Dischargers were impacted or
notified.
By copy of this letter, the North Carolina Wildlife Resources Commission, the North
Carolina Department of Environmental Quality, and the United States Fish and Wildlife
Service are notified and asked to advise Duke Energy immediately if further
consultation is needed.
Please direct questions to Mark Oakley at [phone] (Mark.Oakley@duke-
energy.com) or Lynne Dunn at [phone] (Lynne.Dunn @ duke-energy.com).
Jeffrey G. Lineberger, PE
Director, Water Strategy & Hydro Licensing
Duke Energy
Enclosure
cc with Enclosure:
Chris Goudreau, North Carolina Wildlife Resources Commission
Fred Tarver, North Carolina Division of Water Resources
Bryan Tompkins, United States Fish and Wildlife Service

The Honorable Kimberly D. Bose, Secretary
August 5, 2016
Page 3
Enclosure 1. Lookout Shoals generation conditions for August 1, 2016, with the
period of minimum flows potentially less than 80 cfs highlighted
Date / Time
Unit 1 (mW)
Unit A (kW)
Minimum
Continuous Flow
Met?
01 -Aug -1619:50:00
0
327.9670715
Yes
01 -Aug -16 19:51:00
0
0
No
01 -Aug -16 19:52:00
0
0
No
01 -Aug -16 19:53:00
0
0
No
01 -Aug -16 19:54:00
0
0
No
01 -Aug -16 19:55:00
1
0
No
01 -Aug -16 19:56:00
1
0
No
01 -Aug -16 19:57:00
7
0
Yes
01 -Aug -16 19:58:00
8
0
Yes
01 -Aug -16 19:59:00
8
0
Yes
01 -Aug -16 20:00:00
8
1 0
Yes