20070812 Ver 1_Dissolved Oxygen Monitoring_20071019

ALCOA
October 16, 2007
ELECTRONIC FILING
Ms. Kimberly D. Bose, Secretary
Federal Energy Regulatory Commission
888 First Street, N.E.
Washington, DC 20426
Alcoa Power Generating Inc.
Yadkin Division
PO Box 576
Badin, North Carolina 28009-0576
Tel: [phone]
Fax: [phone]
www.alcoa.com/yadkin
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Re: Alcoa Power Generating Inc. Yadkin Project (FERC No. 2197) Tallwater Dissolved
Oxygen Monitoring
Dear Secretary Bose:
Consistent with the Yadkin Project Dissolved Oxygen Plan required under Article 39 of the
existing license and approved by the Federal Energy Commission (Commission) in 2001, Alcoa
Power Generating Inc. (APGI) is voluntarily conducting continuous tailwater dissolved oxygen
monitoring in the tailwaters of the High Rock, Tuckertown and Falls tailwaters, in addition to the
Narrows tailwater from May 1 through November 30.
Due to the ongoing drought in the Yadkin Pee Dee River basin, the water level in Narrows
Reservoir (which significantly influences the water levels in the Tuckertown tailwater) has
dropped approximately seven feet below full pool. Due to these extreme low water conditions,
which have made it unsafe to service the monitor and have damaged the monitor probe, APGI
has temporarily removed the continuous dissolved oxygen monitor in the Tuckertown tailrace.
APGI will make every effort to reinstall the Tuckertown tailrace monitor prior to November 30,
if and when the water levels in the Narrows Reservoir (Tuckertown tailrace) have come up
sufficiently. APGI will inform you when the monitor has been reinstalled, if it is possible to
reinstall before November 30.
Due to the continued drought and worsening low water conditions, similar situations may arise in
the other Yadkin Project tailwaters and it is possible that APGI may need to temporarily remove
monitors in one or more of the other tailwaters prior to the end of the monitoring season. We
will notify the Commission and the North Carolina Division of Water Quality (NCDWQ) if this
occurs.

By copy of this letter, APGI is also notifying NCDWQ of this situation. Please do not hesitate to
contact me at [phone] or gene.ellis a;alcoa.com if you have any questions.
Sincerely,
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Gene Ellis
Licensing and Property Manager
cc: John Dorney, NCDWQ
Dianne Reid, NCDWQ

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CERTIFICATE OF SERVICE
I hereby certify that I have this day caused to be served by First Class Mail or
electronic mail the foregoing document upon the parties to the official service list
compiled by the Secretary for this proceeding.
Dated at Aylett, Virginia this 16th day of October, 2007.
/s/Joyce F. Brooks
Joyce F. Brooks
Long View Associates, Inc.
179 Clarks Lane
Aylett, VA 23009
804-769-1667