20080915 Ver 1_WRC Comments_20130801

Burdette, Jennifer a
From: Higgins, Karen
Sent: Thursday, August 01, 2013 4:41 PM
To: Burdette, Jennifer a
Subject: FW: Catawba - Wateree Hydroelectric Project - Bridgewater Station Outage September 30
through October 11
E -mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
From: Goudreau, Chris J.
Sent: Thursday, August 01, 2013 3:59 PM
To: Oakley, Mark; 'Mark Cantrell'; Tarver, Fred; Higgins, Karen; 'Dick Christie (christiedCa)dnr.sc.gov)';
'prestohs @dhec.sc.gov'; Kevin(a)americanwhitewater.orq; 'M BLACKBURN I @CAROLINA.RR.COM'; Galleher, George A
Cc: Rash, Jacob M.; Wood, Chris J.; Goodfred, David W.; Fraley, Stephen J; Russ, W. Thomas
Subject: RE: Catawba - Wateree Hydroelectric Project - Bridgewater Station Outage September 30 through October 11
Mark,
The NCWRC has the following comments on this planned outage.
1. We appreciate Duke scheduling the outage outside of the Peak Recreation Season and the Spring Reservoir Level
Stabilization Period.
2. The outage will impact two days (one weekend) of recreation releases in October. We recommend the
replacement dates be added on Fridays in October, if possible.
3. The outage will result in flows less than the MEP critical flow of 75 cfs for the Linville River. During the 2011 outage,
flows below the powerhouse were about 2 cfs. As you know, 2011 was a dry year and we are currently in an
extremely wet year, so hopefully the baseflow will be higher (5 -10 cfs ?). Even so, we recommend that temperatures
be monitored in the same locations as the September - October 2011 outage. The 2011 data may not be a good
indicator of water temperatures we might expect this year.
Chris
From: Oakley, Mark [ mai Ito: Mark.Oakley()duke- eneray.com]
Sent: Thursday, July 18, 2013 4:54 PM
To: Goudreau, Chris J.; 'Mark Cantrell'; Tarver, Fred; Higgins, Karen; 'Dick Christie (christiedCd)dnr.sc.gov)';
'prestohs @dhec.sc.gov'; Kevin(a)americanwhitewater.orq; 'MBLACKBURNI @CAROLINA.RR.COM'
Cc: Galleher, George A
Subject: Catawba - Wateree Hydroelectric Project - Bridgewater Station Outage September 30 through October 11
Duke Energy is planning an outage at Bridgewater Hydro in order to inspect and hopefully repair the Bridgewater Unit 2
Turbine Isolation Valve (TIV). The outage is planned to start on September 30th and run for 12 days ending on October
11th. Depending on the issues we find with the Unit 2 TIV this outage may be a shorter duration.
During this time the penstock delivering water to the powerhouse will have to be drained and no water will be able to
be released from any of the three units or the powerhouse ring jet valve. We will operate the ring jet valve at the
Catawba Dam, so flows in the Catawba Bypass will not be affected. Flows below the Muddy Creek confluence
downstream of the powerhouse will not be affected provided we operate the Catawba Dam ring Jet valve at its full

capacity (approximately 75 cfs). Also, the reservoir level should remain within its normal range (assuming of course no
extreme rainfall events). If we successfully meet our schedule, we will only impact one weekend of recreation flow
releases. No impacts to flow releases or reservoir levels at Catawba - Wateree hydro stations in South Carolina are likely.
I am making this notification and initiating consultation in accordance with the Catawba - Wateree Comprehensive
Relicensing Agreement (CRA) Maintenance and Emergency Protocol (MEP). Per the MEP (see CRA Appendix D), this
event is considered to be Condition A.1- Scheduled Hydro Unit Maintenance. Please respond at your earliest
convenience. Thank you.
Email correspondence to and from this senc:l c is srthject to the N.C. Prihlic Recorc:is Law and may he cEisclose {:I to thirc:l parties.
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