ML19256A108

Forwards Util Application for Amend to Dept of Army Permit Sent to Nrc.Amend Covers Reduction in Width of Barge Slip from 100 to 60 Feet to Reduce Dredging & Rock Excavation Concerns

ML19256A108
Person / Time
Site:	Green County
Issue date:	10/31/1978
From:	Early P POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	Regan W Office of Nuclear Reactor Regulation
References
GPO-763, NUDOCS 7811030099
Download: ML19256A108 (9)

Text

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h POWER AUTHORITY OF THE STATE OF NEW YORK 10 CoLUMous CIRCLE NEW YORK, N. Y.10019 (212) 397.6200 "J "A"LA.E.

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As'sts ANT G NERAL GEORGE L. ING ALLS M AN AGE R4 E N E R AL VICE C H AIR M AN

.s WILBUR L.GRONBERG RICHARD M. FLYNN 4

NAG E GlNEER NG ROBERT 1. MILLONZI WILLI AM F. LUDDY REcTom or GPO-763 THOM AS F McCRANN JR.

Mr. William H.

Regan, Jr., Chief Environmental Projects Branch 3 THIS DOCUMENT CONTAINS Division of Site Safety and POOR QUALITY PAGES Environmental Analysis U.S.

Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

Greene County Nuclear Power Plant Docket No. 50-549 Corps of Engineers Permit

Dear Mr. Regan:

Attached is a copy of the Authority's amendment to the Application for a Department of the Army Permit (Corps of Engineers Permit) for your information.

The GCNPP barge slip as described in the Environmental Report was designed to accommodate two barges.

We have de-termined that provisions for a single barge will be adequate for construction of the GCNPP.

Therefore, the barge slip will be reduced in width from 100 feet to 60 feet.

This will reduce dredging for the approach channel from 23,00 cubic yards to 15,700 yards and will reduce rock excavation from 10,000 cubic yards to 8,000 cubic yards.

This modification will further. reduce any impact of dredging and excavation.on the environment, since the volumes of dredged and excavated materials will decrease as noted above and the area disturbed by dredging will decrease by approximately 40%.

Very truly yours,

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LL4 Paul J.

Early b'I pss a m g3q Ass stant Ch'ef Engineer -

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ATTACil!!E!!T TO APPLICATI0tl FOR A DEPARRIEllT OF Tile AR11Y PER111T I

(Rev. 2 - flay 1978)

Informatton for item 6 Barne Slip The barge ;1ip will be constructed as described in Figures 3 and 6 attached.

The barge stir vill be used during plant constr uct ion for un-loading the major plant e'tuipment such as the tinclear Steam Supply System.

An estimated 15,700 cu. yts, of material will be removed by dredging.

Approximately 8,000 cu. yds. of rock along the shore will be excavated.

Makeup Water Pumphouse The makeup water pumphouse encloses associated equipment necessary to supply the plant uith mTkeup water required during pre-operation.:nd operation.

An estimated 1,000 cu. yds. of material will be removed b) dredging from in front of the intake structure.

An additional 1,560 tu.

yds. of material will be removed by clamshell from within the cofferda.n.

Illowdown Discharne Structure The blowdown discharge structure, used to discharge blowdoun fram the cooling tover basin, is a 30 inch ID, 1,288 foot long burie6 pir--

line extending 137 feet into the liudson River.

The diffuser orl+ntw tien is described by Figure 2.

Approximately 2,000 cu. yds. of ruterial will be removed by credging to lay the pipe.

Armor stone will

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placed over the surface of the trench containing the discharge pipeline Sediment Detent ion liasin Outf all An IM inch ID,.%0 foot long conduit will discharp. clarified area runoff from the sediment detention basin to the liudson River.

The pipe discharge location is given en Figure 7.

Th'e pipe outlet area will be protected by riprap.

Dredge flaterial Type and Disposal The dredged material consists of silt sed iments, with some reck and sand.

All dredging above bedrock will be done by a suction type hydraulic dredge to remove soft sediment, and a clamshell or other suitable dredr,ing equipment wi!! bc J as necessary to remove rocks from the excavation areas.

A I.1 dredged r;.,terial will be disposed ot

' onshore. A dise will be constructed to ensure that neither uaterial nor effluent will be discharged from the disposal area to navigable waters, or the wetland areas shown on Figure 8 Effluent discharges will be conducted to the sediment detention basin for further clari-fication prior to discharge.

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ATTACilEtlEIIT l'O APPI,ILATlo'l Fo!I A

.D._I_: PAR f'IEllr UF Tile Ai"!Y PEfull T (Rev. 2 - flay 1978)

W Construction Rau Water Pumphouse

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A temporary raw water pumphouse will be placed approximat.ly 110 f eet WSW of the permanent makeup wat er pumphr,use.

Tlie t ei..p ' r a ry pumphouse and its independent intake line will be used ti

.up: > 1 - rau vater for construction purposes during t he period prior to the c,i -

st ruct. ion of the permanent makeup wat r system.

The l oca t i'.n the i

construction rau vater puniphouse is given on l'igure 3A.

oppr..unat ly 600 cubic yards of miterial will be removed by dredging and e :cavating during the construction of this facility.

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BARGE SLIP CHANNEL DREDGE PLAN TWf fWfM A'vD M NM A ll ( 8't Hf M9WI D FRIM ARtt Y l

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COUNTY OF!GREENE STATE CF: NEW YORK AFMfCATION BY' POWER AUTHORITY Or THE STATE OF NEW YORK P tif* P O S F.

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s,o n A R r,r a.t i c ArPeoylMA1 FLY 8,000 cu yds OF ROCK WILL PE EXCAVAlFD F ROM THE HARGE SLIP AREA BY

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APFHOXIMA1 FLY ONE MONTH MATERIAL TO BE

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PURPOSE: FOR UNLOADING PLANT EOUIPMENT i r An conc riti, q

DURING PL ANT CONSTRUCTION 4

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DAIUV USGS - I"63 (VF AN SEA LEVEL) f 7 nou noLis PROPOSED BARGE SLIP riwrtH416"

.lN: HUDSON RIVER F-AT GREENE COUNTY NUCLEAR POWER PLANT-CEMENTON E t t a 9' o nj COUNTY OF; GREENE STATE OF: NEW YORK APPLICATION BY: POWER AUTHORITYOF THE STATEOFNEW YORK fgp/

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