ML20100C065

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Informs That DPC Would Like to Raise Level of Standby Nuclear SW Pond from 572 Feet to 574 Feet to Provide Addl Cw Due to Operational Concerns
ML20100C065
Person / Time
Site: Catawba  Duke Energy icon.png
Issue date: 01/25/1996
From: Estridge J
DUKE POWER CO.
To:
ARMY, DEPT. OF, CORPS OF ENGINEERS
References
NUDOCS 9601300038
Download: ML20100C065 (10)


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        .           Des trk$nitut Sulyxul BU9Ikipn Ihry toal llankrwr!!e. NCMT1919 DUKEPOWER January 25,1996 Regulatory Branch -U.S. Army Crops of Engineers P.O. Box 919 Charleston, South Carolina 29402

Subject:

Catawba Nuclear Station - York County, South Carolina Permit #76-2A-084 Standby Nuclear Service Water Pond Level Increase to Elev. 574 File: CN-702.11 Catawba Nuclear Station would like to raise the level of the Standby Nuclear Service Water Pond to provide additional cooling water due to operational concerns. The increase would raise the level of the pond by two feet from devation 572' to 574'. Raising the pond two feet will inundate approximately 3.67 acres of land, of which r

'            approximately 2.07 acres could be classified as wetlands. Please see the attached drawing which provides the location and size of the areas to be impounded.

The pond level is presently maintained at elevation 572'. The pond level will be increased to elevation.57?' by. obstructing two feet of the overflow pipe. Dpke Power.would replace an

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existing' 1 ' foot' steel plate located in'the ~ discharge headwall witli a 3 foot steel or concrbte plate. (See attached engineering sketches,3 pages) Additionally, please find attached a memo dated March 29,1995 from your office for a similar request which was made in 1995. Duke Power request that this modification be handled in a similar manner and that the existing permit be modified to incorporate this change. Should you have any questions, please give me a call at (704) 875-5965. Sincerely, l fo64c ohn Estridge, P.E(7 Environmental Division, Water Protection 1 jte/502 [ 9601300038 960125 PDR ADOCK 05000413 N8 P ppg L/ g anar. ,,ncem. ,

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t l i. Attachments l 1- March 29,1995 Army Corps of Engineer memo l 2- April 12,1995 SCDHEC memo j 3- . CNS Site Map 8.5" x 11" , 4- Site Location shown on USGS Quadrangle  ; 5- Topographic Survey showing pond and areas to be flooded i 6- Sketch of proposed modification to discharge structure (3 pages) l l l cc: Nuclesr Regulatory Commission  ; S.C. Department of Health and Environmental Control- Sally Knowles l Office of Water Quality Certification j

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DEPARTMENT OF THE ARMY ED CH AELESTON DISTRICT.COKPS OF ENGINEERS P O COK .,9 APR 6 1995'

                            -              CH ARLESTON. S C. 2 9 4 0a 0 919             .
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March 29, 1995 C P-

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Regulatory Branch . .. Mr. John S. Carter L. 'W. .. ., Duke Power Company 13339 Hagers Ferry Road -- - Huntersville, North Carolina 28078-7929

Dear Mr. Carter:

This is in response to your letter dated February 2,1995, wherein you requested permission to raise the level of the Standby Nuclear Water Pond in Lake Wylie by attaching either one of the following items to the discharge , structure: 1) a l' high steel pitte which is anchored to the discharge l structure, 2) a l' high concrete curb along the front of the discharge structure, or 3) a l' high steel plate that is welded directly onto the overflow pipe itself. The result of this activity would.be an increase in the Standby Nuclear Service Pond level to 572' (a l' increase). A review of our files indicates that a permit for the Catawba Nuclear Station was issued on February 22, 1977 (#76-2A-084). Therefore, this office i is hereby granting a modification to that permit to reflect the changes on the attached drawings (Sheets 6A and 6B of Cated February 2,1995). These changes include attaching either one of the following items to the discharge l structure: 1) a l' high steel plate which is anchored to the discharge 1 ) structure, 2) a l' high concrete curb along the front of the discharge structure, or 3) a l' high steel plate that is welded directly onto the overflow pipe itself. Please attach this letter with the modified. drawings to the original permit.- All of4 the. conditions to which" the work'is made s'ubject remain in full force and effect. In that this work appears subject to the jurisdiction of the South Carolina Department of Health and Environmental Cor. trol, it is

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highly recommended that you contact that agency to ascertain their l requirements in this matter. Respectfully, Q George H. Hazel LTC, Corps of Engineers District Engineer Enclosure , CLARENCE A. HAM CHIEF, REGULATORY BRANCH

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r.. . v 2000 Burt street, columbia, SC 29201 n,a,,,ogy ,, April 12, mensatMAL P20iECDONSECID( 1995 APR 181995 Duke Power Company  % ME cal '762,/t Blactric System Support - pU r.,y

                                                                                                          " M, Attn: J. S. Carter, Technical system Manager                                                             CATE__

Environmental nivision, water Protection - 13339 Hagers Ferry Road Muntersville, NC 20070-7929 Id CO?T A I Re: Catawba Nuclcar Station ' '

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York County -- Proposed Modification Dear Mr. Carter 18 2 have reviewed the proposed modification to the Standby Nuclear Servie.e foot. Water Pond which would raise the water level in the pond by one Engineers This(COE) modification was submitted in an application to the Corps of on February 6, 1995. You stated in your March 2, 1995 letter that this modification bears directly on continued operation of Commission. Nuclear Station and is required by the Nuclear Regulatory the Catawba Bob Riggs indicated that the COE determined that an existing permit was modified to allow the proposed project modification because it wao not. considered to be a signi ficant deviation, per conversation with Mark Giffin April 12, 1995. The existing COE permit incorporates the State 401 water quality certification, if required. Our records indicate that we issued a 401 water quality certification with no conditions for thic project on May 12, 1976. ) since issued, we no Because of the length of time that has passed longer have a copy of the certification letter, however valid. the 401 water qual'ity certification for this project remains The proposed modification will not contravens water quality

           , the standards          nor change classified uses of Lake Wylie and is consistent with existing 401 water quality certification.
                     .Please questions.                  conta'ct Mark Gif fin at (803)'. '734-5302' if you have' ' ani Sincerely, G 11y            Knowles, Director Division of water Quality                                                                                                    #

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