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Home My WebLink AboutCliffside AAB CBE - Appendix D_20200107Duke Energy Coal Combustion Residuals Management Program December 18, 2019 Cliffside Steam Station — Active Ash Basin CAMA Closure Plan (Closure by Excavation) Revision 0 Wood E&IS Project No. 7812190194 APPENDIX D: ACTIVE ASH BASIN CLOSURE PLAN DRAWINGS LIST OF DRAWINGS • CLS_C9XX.OXX.001 - COVER SHEET • CLS_C9XX.OXX.002 - GENERAL NOTES AND SYMBOL SHEET • CLS_C9XX.OXX.003 - EXISTING CONDITIONS PLAN WITH AERIAL PHOTOGRAPH • CLS_C9XX.OXX.004 - EXISTING CONDITIONS PLAN • CLS_C9XX.OXX.005 - MODELED EXISTING GROUNDWATER CONTOUR MAP • CLS_C9XX.OXX.006 - ESTIMATED BOTTOM OF ASH CONTOURS • CLS_C9XX.OXX.007 - DEMOLITION PLAN • CLS_C9XX.OXX.008 - EXCAVATION PLAN • CLS_C9XX.OXX.009 - EXCAVATION PLAN PROFILES • CLS_C9XX.OXX.010 - FINAL GRADES • CLS_C9XX.OXX.011 - FINAL GRADES - PROFILES • CLS_C9XX.OXX.012 - DOWNSTREAM DAM INITIAL CONDITIONS • CLS_C9XX.OXX.013 - DOWNSTREAM DAM FINAL CONDITIONS • CLS_C9XX.OXX.014 - UPSTREAM DAM INITIAL CONDITIONS • CLS_C9XX.OXX.015 - UPSTREAM DAM INITIAL CONDITIONS • CLS_C9XX.OXX.016 - CLOSURE DETAILS 1 • CLS C9XX.OXX.017 - CLOSURE DETAILS 2 wood. 3 4 5 6 7 8 I .001 REV .____ F DUKE ENERGY ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STAT COAL COMBUSTION RESIDUALS SURFACE IMPOUNDMENT CLOSURE PLAN ACTIVE ASH BASIN (AAB) CLEVELAND AND RUTHERFORD COUNTIES, NORTH CAROLINA AAB DOWNSTREAM DAM STATE ID: CLEVE-049, AAB UPSTREAM DAM STATE ID: CLEVE-050 Soo rt Old Calvary Church Rd / / of 683 rr A 'PC, 8929 / 947R F.ow 1! o n 857IT ti O,assy Ln haneyQ 0 lz [�/b00fl Cameo Dr `.Z.1,,`Q J v cnrsremerd Rd s� Pa J A& � _� , 40 ? BROAD RIVER 1 ' INACTIVE UNIT 5 B—dRl— \7 SITE V 1 Mcr_, 897 R 1 f f f 1 1 1 r 888 It , 1 1 �slEy/erRd 1 1 889 ft I SITE LOCATION MAP 0 2000 4000 6000 GRAPHIC SCALE (IN FEET) ACTIVE ASH BASIN 573 DUKE POWER ROAD MOORESBORO, NORTH CAROLINA 28114 DECEMBER 18, 2019 Sheet List Table Sheet Number Sheet Title .001 COVER SHEET .002 GENERAL NOTES .003 EXISTING CONDITIONS PLAN WITH AERIAL PHOTOGRAPH .004 EXISTING CONDITIONS PLAN .005 EXISTING GROUNDWATER CONTOUR MAP .006 ESTIMATED BOTTOM OF ASH CONTOURS .007 DEMOLITION PLAN .008 EXCAVATION PLAN .009 EXCAVATION PLAN PROFILES .010 FINAL GRADES .011 FINAL GRADES- PROFILES .012 MAIN DAM INITIAL CONDITIONS .013 MAIN DAM FINAL CONDITIONS .014 UPSTREAM DAM INITIAL CONDITIONS .015 UPSTREAM DAM FINAL CONDITIONS .016 DETAILS 1 .017 DETAILS 2 PREPARED FOR: DUKE ENERGY (OWNER) 400 SOUTH TRYON ST. CHARLOTTE, NC 28202 PREPARED BY: WOOD ENVIRONMENT & INFRASTRUCTURE SOLUTIONS, INC. JOSHUA M. BELL, P.E. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 PHONE: (704)-357-8600 N SITE OVERVIEW MAP 0 800 1600 2400 GRAPHIC SCALE (IN FEET) LAT: LONG ION N 35.21 ° W-81.760 NOT FOR CONSTRUCTION TITLE ACTIVE ASH BASIN COAL COMBUSTION RESIDUALS wood. SURFACE IMPOUNDMENT CLOSURE PLAN ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION Wood Environment & COVER SHEET Infrastructure Solutions, Inc. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 FOR TEL: (704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 SEAL NOT FOR CONSTRUCTION ISSUED FOR REVIEW DUKE SCALE: AS SHOWN DES: VMO DWG TYPE: DWG DFTR: VMO/ANI JOB N ENERG Y® DATE ODECEMBER 18, 2019 ERE JBD FILENAME: .001 COVER SHEET.dwg APPD: JB DWG SIZE DRAWING NO. REVISION ANSI D 22"x34" CLS C9XX OXX 001 ---- 9 10 M 0 0 F REV DATE JOB NO. PROJECT TYPE DES I DFTR I CHKD I ENGR DESCRIPTION INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7 Plotted By: Ferry, Kevin Sheet Set: 7812190194 — Active Ash Basin Layout:.001 COVER SHEET December 18, 2019 07: 26: 57pm Q:\Duke\CliffSide\7812190194 — Cliffside Closure Plan\Plansheets\Active Ash Basin\.001 COVER SHEET.dwg 2 3 4 5 6 7 8 I .002 GENERALNOTES SURVEYLEGEND REV .____ 1. PURPOSE 1.1. THIS CLOSURE PLAN HAS BEEN DEVELOPED TO MEET THE REQUIREMENTS FOR WRITTEN CLOSURE PLANS FOR COAL COMBUSTION RESIDUALS (CCR) SURFACE IMPOUNDMENTS AS PRESENTED IN BOTH THE FEDERAL CCR RULE (40 CODE OF FEDERAL REGULATIONS (Cl 257.102(B)(1-VI) AND NORTH CAROLINA'S COAL ASH MANAGEMENT ACT (CAMA, SECTION 130A-309.212(A)(4). THIS CLOSURE PLAN HAS BEEN PREPARED FOR THE REVIEW AND APPROVAL OF THE NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY (NCDEQ). 1.2. THIS PLAN PRESENTS A CLOSURE -BY -EXCAVATION OPTION, AND DUKE ENERGY IS CONCURRENTLY PURSUING CLOSURE -IN -PLACE IS AN ACCEPTABLE OPTION AS WELL. 2. PRELIMINARY CONSTRUCTION SEQUENCE: 2.1. INSTALL STORMWATER RUN-ON PREVENTION CONTROLS, TO MINIMIZE STORMWATER FLOW INTO THE ASH BASIN AS MUCH AS POSSIBLE. A 2.2. DECANT (REDUCE FREE / SURFACE WATER VOLUME) VIA PUMPED DISCHARGE TO EXISTING TEMPORARY WASTEWATER TREATMENT SYSTEM FOR CONVEYANCE TO NPDES-PERMITTED OUTFALL. 2.3. OPERATE WASTEWATER TREATMENT SYSTEM TO MANAGE INTERSTITIAL / DEWATERING WATERS AND CONTACT STORMWATERS DURING CONSTRUCTION. 2.4. DEWATER AND EXCAVATE THE CCR MATERIAL WITHIN THE CLOSURE -BY -REMOVAL AREAS PLACING EXCAVATED CCR MATERIAL WITHIN THE DRYING AREAS FOR ULTIMATE DISPOSITION INTO THE ROGERS CCP LANDFILL AREA. 2.5. DEWATER THE CCR MATERIAL AS NECESSARY WITHIN THE BASIN AREA TO ALLOW FOR TRANSPORT AND PLACEMENT IN THE LANDFILL. MIX WET ASH WITH DRIER MATERIAL AS NECESSARY. 2.7. CONSTRUCT HAUL / ACCESS ROADS AND PERMANENT STORMWATER CONVEYANCE MANAGEMENT IMPROVEMENTS. 2.8. UTILIZE SOILS FROM THE PARTIAL UPSTREAM DAM REMOVAL AND THE OTHER IDENTIFIED ON -SITE BORROW AREAS. REMOVE THE DOWNSTREAM DAM. 2.9. RESTORE THE CLOSURE -BY -REMOVAL AREAS AND ANY ADDITIONAL AREAS DISTURBED DURING CLOSURE. 3. DATUM 3.1. ALL ELEVATIONS SHOWN IN THESE DRAWINGS ARE REFERENCED TO NORTH AMERICAN VERTICAL DATUM, 1988 (NAVD). 3.2. HORIZONTAL DATUM: NORTH AMERICAN DATUM, 1983 (NAD83). B 4. REFERENCES 4.1. ASH BASIN FACILITY BOUNDARIES PROVIDED BY DUKE ENERGY. 4.2. APPROXIMATE LIMITS OF CCR BOUNDARY EXTRACTED FROM BOTTOM OF ASH AUTOCAD CIVIL 3D SURFACE. 4.3. BOTTOM OF ASH CONTOURS TAKEN FROM AMEC FOSTER WHEELER, WASTE STRATEGY ANALYSIS, CLIFFSIDE STEAM STATION, APRIL 17, 2015. HISTORICAL INFORMATION BASED ON HORIZONTAL DATUM NAD27 WAS CONVERTED TO NAD83. HISTORICAL INFORMATION BASED ON VERTICAL DATUM NGVD29 WAS CONVERTED TO NAVD88 USING A CONVERSION OF -0.75 FT APPLIED SITE WIDE. 4.4. BORING LOCATIONS, PIEZOMETER LOCATIONS, AND SEEP LOCATIONS PROVIDED BY DUKE ENERGY.. 4.5. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON JULY 31, 2015 BY WSP. 4.6. HIGH RESOLUTION AERIAL IMAGERY DATED DECEMBER 2011 WAS OBTAINED FROM WWW.ESRI.COM. 4.7. EXISTING GROUNDWATER CONTOURS PROVIDED BY SYNTERRA (2019).. 5. NOTES 5.1. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY" ARE BASED ON AERIAL PHOTOGRAPHY, TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED APPROXIMATE. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE LIMITS OF CCR BOUNDARY" EXCLUDES THOSE STRUCTURES AND IS BASED ON UPDATED TOPOGRAPHIC C MAPPING, REPORTED OPERATIONAL LEVELS, AND SUBSURFACE DATA COLLECTED WITHIN THE BASIN. IT SHOULD BE NOTED THAT THE DETERMINATION OF THE ACTUAL LATERAL EXTENT OF THE CCR MATERIALS WILL TAKE PLACE PRIOR TO, Al DURING, IMPLEMENTATION. 5.2. GROUNDWATER CONTOURS SHOWN IN PLANS ARE BASED ON MODELED EXISTING CONTOUR INFORMATION PROVIDED BY SYNTERRA (2019). BORING LEGEND BORING LOCATION SEEP LOCATION PIEZOMETER LOCATION MISC. BOUNDARY LEGEND — — — — — — — — — — — APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY APPROXIMATE LIMITS OF CCR BOUNDARY 700 CONTOURLEGEND PROPOSED MAJOR CONTOUR (10') PROPOSED MINOR CONTOUR (2') EXISTING MAJOR GROUNDWATER CONTOUR (10') ESTIMATED MAJOR BOTTOM OF ASH CONTOUR (10') DETAIL IDENTIFYING NUMBER SHEET NUMBER OF DETAIL DETAIL REFERENCE CALLOUT X X 700 a O DETAIL IDENTIFYING NUMBER PROPERTY BOUNDARY FENCE 100-YR FLOODPLAIN STREAM EXISTING MAJOR CONTOUR (10') EXISTING MINOR CONTOUR (2') TREE LINE / VEGETATION SINGLE TREE GUARD RAIL PIPE AGGREGATE ROAD TELEPHONE PEDESTAL DRAINAGE STRUCTURE CATCH BASIN WETLANDS DETAIL TITLE 2 TI /LE .080 SCALE SHEET NUMBER OF DETAIL DETAIL NUMBER AND TITLE z OHE LIE UE N FM G G UTILITY EASEMENT UTILITY POLE POWER LINE TOWER LIGHTED UTILITY POLE POWER MANHOLE OVERHEAD ELECTRIC UNDERGROUND ELECTRIC WATER PIPE WATER MANHOLE WATER VALVE WATER HYDRANT SANITARY SEWER FORCE MAIN SANITARY SEWER MANHOLE NATURAL GAS PIPLINE EXISTING SURFACE IMPOUNDMENT CROSS-SECTION IDENTIFYING LETTER SHEET NUMBER OF CROSS-SECTION CROSS-SECTION REFERENCE CALLOUT TITLE ACTIVE ASH BASIN COAL COMBUSTION RESIDUALS wood. SURFACE IMPOUNDMENT CLOSURE PLAN ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION F Wood Environment & Infrastructure Solutions, Inc. GENERAL NOTES 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 FOR TEL: (704) 357-8600 FAX: (704) 357-8638 NOTE: NOT TO SCALE LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 ISSUED FOR REVIEW SEAL SCALE: AS SHOWN DES: VMO DUKE DWG TYPE: DWG DFTR: VMO/ANI rl NOT FOR to) ENEK�'ft7Y® DATE:ODECEMBER 118, 2019 ENGR: JBD CONSTRUCTION FILENAME: .002 GENERAL NOTES.dwg APPD: JB DWG SIZE DRAWING NO. REVISION ANSI D 22"x34" C LS C9XX. OXX. 002 ---- REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR DESCRIPTION INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7 8 9 10 M 0 0 N F Plotted By: Ferry, Kevin Sheet Set: 7812190194 — Active Ash Basin Layout:.002 GENERAL NOTES December 18, 2019 07: 27: 15pm O:\Duke\CliffSide\7812190194 — Cliffside Closure Plan\Plansheets\Active Ash Basin\.002 GENERAL NOTES.dwg c Poo ■ � �. �' AD1-01 X40 � SY-04 0 AD2-01 $ AD2-04 -� G� SY-02 i�` SY-03 SY01 AD$-(,f�D2-03 AD3-01 �. AD3-02 '� oil .46 6�OP i GWA-56D �GW GWA-56S APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY (TYP.) MW-38S SEE NOTE 1 *MW-38BR / BMW-36BRU BMW-38D o + o MW-36S M• sG-17 GWA-35D -OGWA-35S OS-2 B-2 �GWiA -3. 6D GWA-02BRA GWA-36S 0GWA GWA-68BRL WA-02S GWA 03DGWA 02BRU 9 �' + + r%0 4CLEVE-070 P102 A 5-04S CA-U5-02D GWA-67BRL� S 18CCR- 51�OS 1MCCR-U5�Q� 90 B-8CCR U5 04BR'*-. Q.CR-U5 05D �CL"F�5-03S67BR - U5-05BR ftft* \ B-7 B-1 � GWA-04S 4# -U5-05D B-11� #GWA-04D I?U5 03SA B-6CLEVE-070-P100 / B-4 U5-03D 4`B-9 CR-U5-06S B_5/�U504BRA CLEVE 070 P101S 20 CCR U5 06DAUNIT 5�- / INACTIVE $1B-13 U5-04S- 'U5-04BR B 14 CLEVE-072-P100 B-3 U5-16S / ASH BASIN i U5-06,Q - B-12 CR-U5-01 D - U5-02D / 1 r U5-02S-SLA / 1 i'--U5-02S-SLB U5-07SL `\ WA-31BRA U5-07`�� U5 07DS E GWAR31D U5-01 S GWA-01 BRU �` *U5-01 D .r GWA-06S CR- 5-08D GWA 06D '�CC-U5-08S�� JL- A GWA _ 1 V GWA-05-05BRU 1 �B-15 -ii� CCR-U5-09S I / U5-08D- ' / U5-08S - '' TJ5-08B MW-32S ` #MW-32D ` V-05 MW-32BR _ P-13D - GWA-30BR GWA-30S GWA-30BRU / MW-30DA CCPMW-06D MW-S Mo CCPMW 06S CCR-CCP-11BRrtMVr3OD rAa - ,-CCR-CCP-10DA r +CCR-CCP-10S "-CCR-CCP-10D 14; _a- � � DUKE POWER RD. -'- �or .� 7"'CCR-U5-10D /-- MW-42S CCR-U5-10S MW-42D � MW-42DA SITE ENTRANCE 35°12'27.37" N, 81°45'44.75" W L t � CCR-13DS 3 CCR-IB-03S r GWA-10D- 'CCR-IB-03BR GWA-10S-1" eS 10 - - - C-4 *fi-07S 1� I13-07D•s-11 C-5 ' GWA-116R C-7 %GWgA�-11S 1BRU GWA--11 RU � GWA-11 BRL i IB-02S-SLC 6 4k G IB-06D-01MW-25DR BROpp RNER IB 02AL 4 SIB-02BRU -1 OS-13 l IB-021 C_2� 113-03S ,-S-6 - IB-03D+CCR-IB-01SMW20DR 20DR _ �C-3 CCR-IB-01D �� CLP-02 _-W>f04DW 04 GWA-29D W�21 B R U GWA-29BRA OS 5 GWA-21S G A,21 GWA-29BR \D 6 AF SI13-0413R -AS O D40OS-12 S-22�� SE .00 IB-04D -GWA-12S AS-02S tt ,-- GWA-14D GWA-28BR LIB-04S-SL 'GWA-12BRU AS-02BR $D-5�D-4 '� GWA-14GWA-14BR AS-08S GWA-28S J GWA-14S AS 08BR CLP-01 #AS 03BRU *GWA 2 B$ FjylA 64BRL AB-01D OS-9 CLMW 02 S 05S CCR-03BR D-2� AB-01BROR y GWA-38S ?MW-02D AS-09B �D-1 � #GWA-38D - MW 02DA-AS-08D AS-09DAS 0S-055BRU D_3 '� ��/BMW 058 �/ � AS-071 C 1 AS-07BRL AS 076R -AS 7BRA AS-07BRB G W AS-07S -- 1 W .3 i� GWA-54S #GWA-54BRO LAS-07D AS-66S + GWA-54D�A S 06BRA 4 ASH STORAGE AREA 1 ` 0 (SEE NOTE 2- A-1 SAS-04S CC I04D ..�, CLMW 03S +AS-04D GWA-62BR- _ #GWA-59BR CLMW-03D $AS-01E)B ASH STORAGE MW-1os GWA-59D *MW-10D GWA-62BRU AREA 2-�OrCCR-05D -GWA-57BRU (SEE NOTE 3) • � l GWA-57S - GWA-58BRU GWA-6 R GWA 333S- GWA-58S GWA-6 �A ?GWA-51D � CCR-07S CCR-06D R - - - CR-06S GWA-33D GWA BRL ` �. / ` CLi" r-GWA-61BI GWA-43D -GWA-39SS-14o r - U-4CCU 1 *GWA-61BRU GWA-43SJ S 150 S_ c, R F , M -23DR RUTHE- 05 GWA S -5 4, `� ✓ �.. .; S 160 ��Ai��AB-02S AB 026R0 ' AB-07BR 4# GWA-44S MW-23S MW-08S CCR-0 BR *AB-07S GWA-608RU GWA 446R MW-08D AB-02D-AB-07BRU GWA-60BF; `GWA-44DCCR1 D U 2THE Q50 _P100`�`/ 1 �% ` O8D 4 ■ CAB-08BR / CCR-12 -�, U-7 AB-03MA15 CAB-08S AB-03BRU 1, M-03SLA ` CCR-12 AB 03S 15 AB-09BR l AB-031� AB-09D A-03BRUA -03BR AB-09S rya r IWP/66BRL-� -03BRA r V � AB-04UA15 U-10 $CCR 13D �� ACTIVE A-04D ASH BASIN CAB-04BR AB-04S ` AB-04LA15 - � J U 8 -�-CCR-1 DJ GWA-24- GWA-27 MW-7 -GWA-45D r # GWA-45S ` ... kk Ao GWA-48BR AB-05BV -�ICCf,15D AB-05BR ` { � ?' � GWA-63 AB-05S/ -� U-9 ` MW-22-+MW-22BR MW-22DR GWA-47D / GWA-26 / 1 r � � I �r �! es-8 r IMW-06 i r+ TITLE ACTIVE ASH BA! 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I j \�-- ,_ // III I / // /// /19 — \ % \ // / /// — \ 10�/ 'atio ^I o / /� 1 I I I l /// / / / / �� i i I / n \ ,\� ", I I I I / / / / / // / / \ ) I I ( I I , I I ( / F n I f — __�/ ` i 2801 YORKMONT ROAD, SUITE 100 — __ II / %�/// /", \�_ (/ /// // p'-��\�_i/ )Ill (/ �__--\ \ / ///// // ` o I� l o r/ —//ice/ / 1 1 / / / �\ / / ) l 11 / / /// �-// ,p — � — / ( / \ \ I / %� /// / / / \ \ 0 1 / � 1 % I // i /ii CHARLOTTE, NC 28208 FOR \0 / I / //I //�� /�/ /ii �I ��/�////ice/iii/ , ��v � 1 t / A 1` I I I l �///// /�i// /� A\Vo\ gI I 1 1 1 v //�//� / I I I / / / / /� \ _� I I l \ \\ \ \ \ / // /- o � I I ( I / I / 00/ / // _/// /\ TEL: (704) 357-8600 FAX: (704) 357-8638 / l �/ / I I I �/� / — \ %r js� l/ /// //// /�/�// _ — ,- - \ \\ / // / / / N1 \I \ 11 I (I \ / /l l w // / //// /// LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 ISSUED FOR REVIEW . //11 I / / /// // - ,_ ) III I v _ // \ VI I I / / / / /// , // \ \1 v l l l l O / // n \ 1 II,� ,// /// I1, )I / _ \\ —_/mil. r ��/��/////%� iii//iij g10� — J — �\ (I I I � \ / / � \ \\\ SEAL I I I� — \ \ ICI I / I l i �_� \ — _ ` — _ \ \\ \\ \ 1 \ \ i /// o \ \\ )\\, SCALE: AS SHOWN DES: VMO NOTE: - - \ \ I I / DUKE 1. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY" ARE BASED ON AERIAL � / -- -_- _ ~ \\\ \\ \ III 1 _� � / I IIII '� � � DWG TYPE: DWG DFTR : VMO/ANE PHOTOGRAPHY, TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED \ _ - ` \ \\\ \ \\ \ \\ \ \ - / _/ / 111 JOB NO: 7812-19-0194 CHKD: KRD APPROXIMATE. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE / i _ \ \ \ \ \\ \\\ \\\ = = / / I I ENE plot LIMITS OF CCR BOUNDARY" EXCLUDES THOSE STRUCTURES AND IS BASED ON UPDATED TOPOGRAPHIC MAPPING, REPORTED OPERATIONAL LEVELS, AND SUBSURFACE DATA COLLECTED WITHIN THE BASIN. IT SHOULD BE NOTED THAT THE DETERMINATION OF THE ACTUAL LATERAL EXTENT OF THE CCR MATERIALS / \ / g30 \\\\ \\\ \� ,� \� j / � // //� NOT FOR DATE: DECEMBER 18, 2019 ENGR: JB WILL TAKE PLACE PRIOR TO, AND/OR DURING, IMPLEMENTATION. I / V \ \ \ \ \ \ \ \ - 2. EXPLORATIONS PERFORMED IN ASH STORAGE AREA 2 INDICATED NO PRESENCE OF ASH, THEREFORE ASH STORAGE AREA 2 IS NOT INCLUDED IN THE ASH BASIN I \ \\ \\ z I 1 i / //�// /� FILENAME: .005 EXISTING CONDITIONS- TOPO.dwg APPD: JB 1 1 CLOSURE PLAN. \\\\l I \\ \�\\\\\� -_/ J) / I / / ///// � \ CONSTRUCTION \\ \\ // / / \ \ I / //// \\ . DWG SIZE DRAWING NO. REVISION REFERENCES: \\\ ��//l/ \ ) I 1 ) / / / / / // / \ _ 2. EXISTING 1. ASH IrTOPOGRAPHIC NFACILITY DFORIMATIONING LOCATIONS, WAS PRODUUCEDPIEZOMETER LOCATIONS, AND WETLAND AND SEEP FROM PHOTOG AMMETR C METHODS FROM AERIAL PHOATIONS TOGRAPHY GRAPHYY OIDED BY DUKE BTAINED ON JU Y 31, 2015 BY WSP Y. \\\\\� - /%//' J I I) ) ) I I I ( / / / / \/// ANSI D v\\�_--��-%- \// / 1 , I I , I , (, , I ( 22"x34� CLS C9XX.OXX.004 ---- \\, — "\ \ � / I l REV DATE JOB NO. 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THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY" ARE BASED ON AERIAL / l ' - / /�/i /� / L I / ( / / PHOTOGRAPHY, TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED \ \ / 5 - / / ' ' / / ' % r I I l l/ I I I o I o\ rn o \ 1 I ( 1 SEAL APPROXIMATE. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE LIMITS // � / ` - - SCALE: AS SHOWN DES: VMO DATA COLOF CCIR OLECTDED WITHIN LUDES THE BASIN. ET SHOULD BE NOTSTRUCTURES DIS ED THAT ON DETEDRMINDATIOON OF THE/ ACTUALNATERALOEXTDENT OF OPERATIONAL MATERIALS WILL TAKE GWA ( 11 \ l_ � _ # DUKE DWG TYPE: DWG DFTR : VMO/ANE PLACE PRIOR TO, AND/OR DURING, IMPLEMENTATION. . I ll l \ �Gw �� \ � � � � ,� / / -' JOB NO: 7812-19-0194 CHKD: KRD 2. GROUNDWATER CONTOURS SHOWN ARE BASED ON MODELED EXISTING CONTOUR INFORMATION PROVIDED BY SYNTERRA (2018). 33 R\ % lI _�______ E N E RGY® REFERENCES: 33D \ I I / - / / NOT FOR DATE: DECEMBER 18, 2019 ENGR: JB 1. GROUNDWATER CONTOURS SHOWN ARE BASED ON MODELED EXISTING CONTOUR INFORMATION PROVIDED BY SYNTERRA (2018). \ -\L I - II I /, CONSTRUCTION FILENAME: .006 EXISTING GROUNDWATER CONTOUR MAP.dwg APPD: JB 2. BORING LOCATIONS, PIEZOMETER LOCATIONS, AND SEEP LOCATIONS PROVIDED BY DUKE ENERGY. - 3. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON JULY 31, 2015 BY WSP. J - \\� I I �/ / / DWG SIZE DRAWING NO. REVISION - R I / IIII M jTq � �\ IIII ,;�'' 22 ANSI C LS_C9XX. OXX. 005 ---- \\\\ �` REV DATE JOB NO. 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- / 111 A v�� \��vy _l'� - %j ✓�/Ill IIII / - -�) // I 1 V IIII l I I I 1 lJl 1) I l / Wood Environment & / /Ill I ?t\t\� r I / (\1� 1 \ I \ / - - / / /�// ///// _7so_ - /// 111 IIII\ 1 I 1 I l lI / / l i y\ \ /i//�/�/% ( /----/- _/_//IIII ( r/i _ �/ / 1/I III \ ! I l 11 Jjl/ /// // l// ESTIMATED BOTTOM OF ASH CONTOURS I / �� - - _/ _ J�/, l- // J /\�� - - Gwll /IIII \ - \\1 \ \ - --- / IIII/ �i�l)1 11 / /ice - _ - / / 1 I III I I / / �/ / / Infrastructure Solutions, Inc. i / I I �� - / / /i��/ - / /ro /// / / I I I l l // / / _ \ \v G A 11\\ \��-%'w - -/ / �iiiiiiiiiiii / / / l 1 / // / / l I i I11� III I I I I ll /// w� �� _ �� V��\ — //� // �/ ) 1 I 1 I I I 11 / /// Ill / l ' 2801 YORKMONT ROAD, SUITE 100 ( III �/ \� �_\_ �1 ��—� �_ — --%— = %0� Z GV - / \��\\\\ /� / 1 �� \\,�', _! _�� / //%�//��///////////l I 1 ,\ — _// /��/�/ //l ll/ 11) l l / I I I II //// /// X // //// / / CHARLOTTE, NC 28208 FOR ( / �� = _ _ � / ( / \\VA\ — /�_/� % GWA-42S ((i ��_ _ = i / / A //%//�//////�/j // \ _ / // /l� / 111 Ill/ l I I l I 1 ( I II I(I (1(( //, �// o / I TEL: (704) 357-8600 FAX: (704) 357-8638 / I I ( /__� ___-- _ / _� \ \ \ > )y / //// / / \ / l I IIII %� l \�\,A \ / _— �-� — _ — �� — — ��/ ) j� II I// / � )IIV �1 / j %� j / V / l / ^ \ / io/iii//,��! " /, � //� i � - �I I 1V ��/i/l�l /Ill �lll// �,/ 1 1 iJ i I I I � 1 I to �I oA d'O(\ 11� l I/ /� I I � i LICENSURE: NC ENG F 1253 NC GEOLOGY: C 247 ISSUED FOR REVIEW NOTE: 1. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY' ARE BASED ON AERIAL PHOTOGRAPHY, TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED APPROXIMATE. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY' INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE LIMITS OF CCR BOUNDARY' EXCLUDES THOSE STRUCTURES AND IS BASED ON UPDATED TOPOGRAPHIC MAPPING, REPORTED OPERATIONAL LEVELS, AND SUBSURFACE DATA COLLECTED WITHIN THE BASIN. IT SHOULD BE NOTED THAT THE DETERMINATION OF THE ACTUAL LATERAL EXTENT OF THE CCR MATERIALS WILL TAKE PLACE PRIOR TO, AND/OR DURING, IMPLEMENTATION.. REFERENCES: 1. BOTTOM OF ASH CONTOURS TAKEN FROM AMEC FOSTER WHEELER, WASTE STRATEGY ANALYSIS, CLIFFSIDE STEAM STATION, APRIL 17, 2015. 2. ASH BASIN FACILITY BOUNDARIES, BORING LOCATIONS, PIEZOMETER LOCATIONS, AND WETLAND AND SEEP LOCATIONS PROVIDED BY DUKE ENERGY. 3. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON JULY 31, 2015 BY WSP //// / C /// GWA-33 GWA 43S ( / % ( GWA-33BR\ — \ l I (\ ) GWA-33D \ / \\1\_ -/-`L I, / \\--- III - �\ \\` 1 ��\\ = bl�/- D R �\\��_-\ D �� _ \ __—_—�/— \ \ / \\—/ / \�� _ � A -w-_� �� _�� vvAV\ �_ / / /�- / /� j�j/ ii � I ,/�/ REV DATE JOB NO PROJECT TYPE I DES I DFTR I CHKD I ENGR DESCRIPTION SEAL SCALE: AS SHOWN DES: VMO DUKE DWG TYPE: DWG Dl VMO/ANI ENERGY® ATE ODECEMBER 118, 2019 ENGR: JBD NOT FOR CONSTRUCTION FILENAME: .008 ESTIMATED BOTTOM OF ASH CONTOURS.dwg APPD: JB DWG SIZE DRAWING NO. REVISION ANSI D 22"x34" C LS_C9XX. 0XX. 006 0 O 0 0 1 1 1 1 F INCHES 1 2 3 TENTHS 10 20 30 Plotted By: Ferry, Kevin Sheet Set: 7812190194 — Active Ash Basin Layout:.008 ESTIMATED BOTTOM OF ASH CONTOURS December 18, 2019 07: 29: 57pm Q: \Duke\CliffSide\7812190194 — Cliffside Closure Plan\Plansheets\Active Ash Basin\.008 ESTIMATED BOTTOM OF ASH CONTOURS.dwg 8 9 10 780 C, Lo 11, K, Aw" am1w by EXISTING OUTLET STRUCTURE AND PIPING (SEE DEMOLITION NOTE 3).1 �795 RISER INTAKE STRUCTURE (SEE DEMOLITION NOTE 2) WIMP MARNME111111111l 41. kip A. EXISTING CHEMICAL STORAGE * N AND PUMPING BUILDING (SEE DEMOLITION NOTE 4) -_4 820 C) p M CD co 00 0 t1_ �, ;, tk A 4 y 4( A I 5 EXISTING DEWATERING TREATMENT PAD LOCATION I OFV 35,j, -1 f .,_, I 7 8 .007 REV.---- . Y & 200 0 200 400 FT CD 00 1;9 A -,UAW 5� .0- Ike N k* A. • L 40 K.Z, 1r 4 tad 71 17"ll- *4 Ail V Al AA At we Jr 44 I CP O C) to 00 'w —E A 4-, k ,` 7 AM 770 " .,a7,7 DEMOLITION NOTES: 1. THIS PLAN PROVIDES A SUMMARY OF CONCEPTUAL DEMOLITION PLANS OF STRUCTURES ASSOCIATED WITH THE ASH BASIN AS PART OF CLOSURE. A DETAILED DEMOLITION PLAN WILL BE —F DEVELOPED PRIOR TO CONSTRUCTION. p 2. EXISTING ABANDONED ACTIVE ASH BASIN RISER INTAKE STRUCTURE TO BE REMOVED TO TOP OF EXISTING ASH. 3. DEMOLISH EXISTING OVERFLOW SPILLWAY ONCE ASH HAS BEEN REMOVED OR GRADES HAVE REACHED AN ELEVATION TO CONTAIN BACK TO BACK (2) FULL PMP EVENTS WITHOUT SPILLWAY \\\ s;, 14� ACTIVATION. RCP PIPE SECTIONS AND JUNCTION BOXES MAY BE RECYCLED OR REUSED WHERE POSSIBLE. STOCK PILE STONE FROM GABION SECTION FOR REUSE. 4. DEMOLISH EXISTING CHEMICAL STORAGE BUILDING ONCE ASH HAS BEEN REMOVED OR GRADES HAVE REACHED AN ELEVATION TO CONTAIN BACK TO BACK (2) FULL PMP EVENTS WITHOUT SPILLWAY ACTIVATION. NOTE: 1. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY" ARE BASED ON AERIAL PHOTOGRAPHY, TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED APPROXIMATE. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE LIMITS OF CCR BOUNDARY" EXCLUDES THOSE STRUCTURES AND IS BASED ON UPDATED TOPOGRAPHIC MAPPING, REPORTED OPERATIONAL LEVELS, AND SUBSURFACE DATA COLLECTED WITHIN THE BASIN. IT SHOULD BE NOTED THAT THE DETERMINATION OF THE ACTUAL LATERAL EXTENT OF THE CCR MATERIALS WILL TAKE PLACE PRIOR TO, AI DURING, IMPLEMENTATION. REFERENCES: 1. BORING LOCATIONS, PIEZOMETER LOCATIONS, AND WETLAND AND SEEP LOCATIONS PROVIDED BY DUKE ENERGY. Z Z 2. HIGH RESOLUTION AERIAL IMAGERY DATED DECEMBER 2011 WAS OBTAINED FROM WWW.ESRI.COM. 3. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON JULY 31, 2015 BY WSP. 4. APPROXIMATE LIMITS OF CCR BOUNDARY EXTRACTED FROM BOTTOM OF ASH AUTOCAD CIVIL 3D SURFACE. BOTTOM OF ASH CONTOURS TAKEN FROM AMEC FOSTER WHEELER, WASTE STRATEGY ANALYSIS, CLIFFSIDE STEAM STATION, APRIL 17,2015. REV DATE JOB NO. PROJECT TYPE DES DFTR, CHKD, ENGR, DESCRIPTION I I I I I I I I 1 1 1 1 7�� III I I I I I I I I I I I I I 7=1 I I I I I I I I I I IINCHES 11 21 3 ITENTHS 10 1 20 1 30 4 5 6 7 I I I I Plotted BY: Ferry, Kevin Sheet Set: 7812190194 — Active Ash Basin Lcyout:.009 DEMOLITION PLAN December 18, 2019 07:31:15pm Q:\Duke\CIiffS!de\7812190194 — CliffsIde Closure Plan\Plcnsheets\Active Ash Basin\.009 DEMOLITION PLAN J:,,-i All81 'Y 800 79 ACTIVE ASH BASIN BOUNDARY 01 4_�f 4 4-'l 4A, 0 w� Ay r oil % TITLE ACTIVE ASH BASIN COAL COMBUSTION RESIDUALS wood* SURFACE IMPOUNDMENT CLOSURE PLAN ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION Wood Environment & DEMOLITION PLAN Infrastructure Solutions, Inc. 2801 YORKMONT ROAD, SUITE 100 FOR O CHARLOTTE, NC 28208 TEL: (704) 357-8600 FAX: (704) 357-8638 ISSUED FOR REVIEW LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 'jil Z NOT FOR CONSTRUCTION DUKE ENERGY® SCALE: AS SHOWN DES: VMO DWG TYPE: DWG DFTR: VMO/ANI JOB NO: 7812-19-0194 CHKRD l DATE: DECEMBER 18,2019 ENGR: JB FILENAME: .009 DEMOLITION PLAN.dwg APPD: JB I SIZE DRAWING NO. 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I I I I I I l /Ill // /// // / / l l CHARLOTTE, NC 28208 FOR �� I )I / r I (1 �_� __ __ _— _— — - / / l /� ��\�\ 1 /'! /� j % GWA-42S � ( ( I �� /�,\ V ��/�////////j// �/% // \ A - // / //�// l// /// l I 1 i I I I I I I I (I I M I // , /// N l I TEL: (704) 357-8600 FAX: (704) 357-8638 c+ /// 1 \� _ _-_ — - �, /� / I)I \ /� j� x / / / / �� __ - � / / - \ \ ///%�//j/%/// j %�// I I L � J I / /// // �/ / / I I I I I I I I I I I III gyp° A 1 I o l / /a� l LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 ISSUED FOR REVIEW 1� 1 �\�� :ate �� s , lII ,I ( l�l/l l )il �%� �, 1' \ � 4 � — — — \ / / / /� f I I i / Il// I I IoA oo I I SEAL SCALE: AS SHOWN DES: VMO NOTE: //// ///I \ /// -_ / /- 1. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY" ARE BASED ON AERIAL PHOTOGRAPHY, / /� \ \ GWA-43D ( ( � r� r J #* DUKE DWG TYPE: DWG DFTR : VMO/ANE TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED APPROXIMATE. THE "APPROXIMATE LIMITS OF /%�/ GWA-43S I \ ( � \ __ \ / / JOB NO: 7812-19-0194 CHKD: KRD ASH BASIN FACILITY BOUNDARY" INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE LIMITS OF CCR BOUNDARY" EXCLUDES THOSE //J ( GWA-33�S \ / ENERGY® STRUCTURES AND IS BASED ON UPDATED TOPOGRAPHIC MAPPING, REPORTED OPERATIONAL LEVELS, AND SUBSURFACE DATA COLLECTED WITHIN THE BASIN. (,/ xGWA-33BR\ - \ I IT SHOULD BE NOTED THAT THE DETERMINATION OF THE ACTUAL LATERAL EXTENT OF THE CCR MATERIALS WILL TAKE PLACE PRIOR TO, AND/OR DURING, '1 \ GWA-33D \ I / , / / NOT FOR DATE: DECEMBER 18, 2019 ENGR: JB IMPLEMENTATION. 2. EXPLORATIONS PERFORMED IN ASH STORAGE AREA 2 INDICATED NO PRESENCE OF ASH, THEREFORE ASH STORAGE AREA 2 IS NOT INCLUDED IN THE ASH BASIN \ J �\, / \ I / FILENAME: .011 EXCAVATION PLAN.dw APPD: JB CLOSURE PLAN. \ � __\ - _ � -� , / � CONSTRUCTION g REFERENCES: \ — — � 1 I / �/ DWG SIZE DRAWING NO. REVISION 1. ASH BASIN FACILITY BOUNDARIES, BORING LOCATIONS, PIEZOMETER LOCATIONS, AND WETLAND AND SEEP LOCATIONS PROVIDED BY DUKE ENERGY. � _ �- �R � �// ANSI D 2. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON JULY 31, 2015 BY WSP. � \�� 1_ T� \ C LS C9XX. 0XX. 008 ---- j \ / / / / 22"x34" \\\\\ // REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR DESCRIPTION INCHES 1 2 3 THIS 10 20 30 4 5 6 7 8 9 10 1 1 1 I I I Plotted By: Bell, Josh Sheet Set: 7812190194 - Active Ash Basin Layout:.011 EXCAVATION PLAN December 18, 2019 09: 35: 01pm Q:\Duke\CliffSide\7812190194 - Cliffside Closure Plan\Plansheets\Active Ash Basin\.011 EXCAVATION PLAN.dwg M11 REV .____ 0 C F 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 650 SECTION A -A 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 C) O O O O O O O O O O O O CD O O O O O O O O O O O O O O O O O O O O O O O O O 0 C) O O O C) C) C) C) C) C) C) O C) C) O O O O O O O O O O o L0 o L0 o L0 o L0 0 L0 o Ln o LO o LO o L0 o L0 0 L0 0 L0 0 L0 0 L0 0 Ln 0 Ln 0 Ln 0 LO 0 L0 0 L0 o L0 o L0 o L0 o L0 o LO o LO o LO o LO o L0 o LO o LO o LO + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + O C) N N CO CO It � LO LO (O (O ti ti 00 00 0) CY) O O N N M CO L0 L0 (O (O ti rl- 00 00 M M C) O N N M M M M (O (O ti ti CO CO M M O C) SECTION A -A 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 650 O O O O O O O O O O O O O O O O O O O O C) C) C) C) C) C) C) C) C) C) C) O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O co LO O LO O LO O LO O Ln O Ln O Ln O Ln O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O M O M O M O M O M O LO O LO O LO O LO 00 + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + N N M M It It LO LO (.0 (.0 I'l- I'l- 00 00 0) 0) O O N N M M � � M M (.O (.O ti ti CO CO M M CD O N N M M It It M In CO CO rl- I'l- CO CO M M O O N N N co co co co co co co co co co co co co co co co co It It It It It It It It It It It It It It It It It It It It LO LO LO LO LO LO LO LO LO LO LO LO LO LO LO LO LO LO LO LO (O (O (O (O (O (O C0 SECTION B-B SECTION D-D SECTION E-E 810 805 800 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 810 805 800 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o m- O L0 O L0 O L0 O LO O LO O Lc) O LO O L0 0 L0 0 L0 0 L0 CD L0 CM + + + + + + + + + + + + + + + + + + + + + + + + ++ O O N N M M 'It 'It M LO (0 (0 fl- fl- 00 00 0) 0) 0 0 CXN SECTION C-C 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 O C)0 CD O O O O O 0 C) O O O O O O O O O (0 0 LP) 0 L0 O Ln CD L0 (D L0 CD L0 CD Ln O LO 0 LO CD L0 00 + + + + + + + + + + + + + + + + + + + ++ N N M M cF cF LA LA ((] ((] 1�_ 1�_ Of5 07 ('S) M M INCHES 1 2 3 ITENTHS 10 20 30 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 O O O O O O O O O C) O O O O O O O N O LO O LO O Ln C) LO O LO CDLO C) LO C) U') O co + + + + + + + + + + + + + + + + + + O O N N CO CO � � LO LO C0 C0 Il- rl- 00 00 REV DATE JOB NO 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 650 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 650 0 0 0 0 0 0 O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C N 0 LO 0 LO 0 LO 0 LO 0 LO O LO 0 LO 0 LO 0 LO 0 LO C + O+ + + + + + + + + + + + + + + + + + + + + O O c- N N CO CO �t �t Liz Liz (0 (0 rl- rl- 00 00 0) 0) O O SECTION MAP VVr\L L. 1 — JVV Ill/�i-41u%� �� r / 0 0 0 M c 1 1 0 1 1 0 M TITLE ACTIVE ASH BASIN COAL COMBUSTION RESIDUALS wood* SURFACE IMPOUNDMENT CLOSURE PLAN ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION Wood Environment & Infrastructure Solutions, Inc. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL: (704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 EXCAVATION PLAN PROFILES FOR ISSUED FOR REVIEW SEAL NOT FOR CONSTRUCTION DUKE rl ENEK%--7Y® SCALE: AS SHOWN DES: VMO DWG TYPE: DWG DFTR: VMO/ANI ODECEMBER ATE 118, 2019 ENGR: JBD FILENAME: .012 EXCAVATION PLAN PROFILES.dwg APPD: JB DWG SIZE DRAWING NO. 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A\ 1 �� - -__ _ �� _ / / vwv\v a .016 Al \ //_/�i IIII /�I l / /i - // 1I l i I I / // l / /\\\\� i l / _ / i/� // / ))�, I I I 1 // / / / 2801 YORKMONT ROAD, SUITE 100 J\�\ (I I � �� `�� — — — �I G % \\�\\\ GOGW* Aft% \ ; \I`\\\\\\�' /�� i i / /� //%///�////%/// // /// I I 1 j / / // /l l ll I ) I II / l 1 I I I i I /// / ////� // i // l l l CHARLOTTE, NC 28208 FOR _ II �h _ — = _ —___ ____ = ___= _ / /c >\ \\�— 1/%j / l \��! / / \ //�i� / /� / l // �/j1 / l l llI o/ 0 1 1 J i o o 1 0 0 / �� / /N I Jl / �/ I ( �� — -- _ —_ — —__ / \\\ // / GWA-42S \ ': �� /- IIII/// j // \ — _ /� // /l�// // 111 ^� I I � . I n I I I I I // 0 / / TEL: (704) 357 8600 FAX: (704) 357 8638 = i \ 1 \��_ —=�- — / I l \_�/ / l \ % y / / %��/�// / / / ( 1 \ J / // / / / I I I I i 1 I / / / I I I LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 ISSUED FOR REVIEW V /// / // )I I\ /i IIII l �// // /� / \ l 1 l / l 1 � _ _ _ e - - i, o I ice/ �/x V l v _ _ / I l / // l l I I \ V\\I� 11 l f I /j // _ SEAL NOTE: I ( 1��//J/// /%� A ��Il I �� v - / - SCALE. AS SHOWN DES. VMO 1. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY" ARE BASED ON AERIAL ! //// /y \ 1-1 GWA- ( ( -1-1 '� � I- - D UKE DWG TYPE: DWG DFTR : VMO/ANE PHOTOGRAPHY, TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED /%�/GW 43 ( \ \ / APPROXIMATE. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE //J GWA-33S- I I \ \ \ / 'JOB NO: 7812-19-0194 CHKD: KRD LIMITS OF CCR BOUNDARY" EXCLUDES THOSE STRUCTURES AND IS BASED ON UPDATED TOPOGRAPHIC MAPPING, REPORTED OPERATIONAL LEVELS, AND �/ xGWA-33BR\ l \ \ ENE P10014,V ® SUBSURFACE DATA COLLECTED WITHIN THE BASIN. IT SHOULD BE NOTED THAT THE DETERMINATION OF THE ACTUAL LATERAL EXTENT OF THE CCR MATERIALS \ o GWA-33D \ I I I \ \ — / / NOT FOR DATE: DECEMBER 18, 2019 ENGR: JB WILL TAKE PLACE PRIOR TO, Al DURING, IMPLEMENTATION. _ \� J\_�`_. \L I, I/ �� CONSTRUCTION FILENAME: .013 FINAL GRADES.dwg APPD: JB - \+ - � � I I / / DWG SIZE DRAWING NO. REVISION REFERENCES: , — \\ 1 O / 1. ASH BASIN FACILITY BOUNDARIES, BORING LOCATIONS, PIEZOMETER LOCATIONS, AND WETLAND AND SEEP LOCATIONS PROVIDED BY DUKE ENERGY. \ \\\\ �- R � / /\/ ANSI D 2. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON JULY 31, 2015 BY WSP. �\\ M T� I \ /'/�/ 22"x34" C L S C 9XX . OXX . O 1 O --- \ \\� l \ \ �`z / // \\\ REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR DESCRIPTION INCHES 11 2 3 TENTHS 10 20 30 4 5 6 7 8 9 10 Plotted By: Ferry, Kevin Sheet Set: 7812190194 - Active Ash Basin Layout:.013 FINAL GRADES December 18, 2019 07: 33: 42pm Q:\Duke\CliffSide\7812190194 - Cliffside Closure Plan\Plansheets\Active Ash Basin\.013 FINAL GRADES.dwg .011 REV .____ F 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 650 810 805 800 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 SECTION A -A 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O LO C) LO O LO O LO C) LO O LO O LO O LO O LO O LO C) MC) LO C) MC) U) O U) O U) C) U) O LO C) LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO C) LO C) LO + O O N N M M 1:t 1:t M M (0 (0 1 1 00 00 O O O C) N N CO CO � � LO LO (0 (0 I� ti 00 00 0) 0) O O N N M M 'It 'It M M (0 (0 f— r— CO CO M M O C) SECTION A -A 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 650 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O co LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO O LO 00 + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + N N co co � � LO LO (0 (0 Il- ti 00 00 0) 0) O O — — N N CO CO 'It 'It LO LO (O (O fl- fl- 00 00 0) 0) O O — N N CO CO � � M LO (0 (0 f� f� 00 00 M M O O N N N (M (M (M (M (M (M (M (M (M (M M M M M M M M It It It It It It It It It It It It It It It It It It It It M M LO LO LO LO LO LO LO LO LO LO LO LO LO LO LO LO M LO (O (O (O (O (O (O O SECTION B-B 810 805 800 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 O O O O O O O O O O O O O O O O O O C) O O O O O CD- C) Lr) o Lr) O LS) o Lr) o Lr) o LO O LS) o Lr) o Lr) o Ln o L0 O L0 + + + + + + + + + + + + + + + + + + + + + + + + ++ O O — — N N M M � � LO LO (0 (0 fl- fl- CO M O M C) C) - - (V'1 SECTION C-C 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 O C) O O O O O O O O O O O O O O O O O O (O O In O Li) O Li) O In O LO O L() O L() O L() O L() O L() 00 + + + + + + + + + + + + + + + + + + + ++ O O — — N N CO CO � 1:t Li) Lr) (0 (0 I- 1 00 00 O O O INCHES 1 2 3 ITENTHS 10 20 30 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 SECTION D-D 795 790 785 780 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 O O O O O O O O O O O O O O O O O N O LO O LO O LO O LO O L[) O LO O LO O LO C) M + + + + + + + + + + + + + + + + + + O O N N M M � � LO LO (0 (0 1 1 00 00 SECTION E-E 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 650 C 775 770 765 760 755 750 745 740 735 730 725 720 715 710 705 700 695 690 685 680 675 670 665 660 655 650 O O O O O O O O O O O O O O O O O O O O O O CN C) LO O LO O LO C) LO O LO C) LO C) LO C) LO C) LO C) LO O LO 0— + + + + + + + + + + + + + + + + + + + + + + ++ O O N N CO CO It It LO LO (O (O I,- r,- 00 00 O O \ �, ��Jv \' v� I l 1�zc \\\\ 77 �zz�� \ 01, _��I ( )II I111 I I � �y\�l �J��— � /e//lll �II %-aV l/(��\�/IIJ� Ill f�i��1�III(�, %A�1��ll��llll —� y SECTION MAP VVr\L L. 1 — JVV 150 0 150 300 FT /j 0 Li O w 0 m .1 1 0 1 1 0 W) TITLE ACTIVE ASH BASIN COAL COMBUSTION RESIDUALS WOO SURFACE IMPOUNDMENT CLOSURE PLAN ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION Wood Environment & Infrastructure Solutions, Inc. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL: (704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 FINAL GRADES- PROFILES FOR ISSUED FOR REVIEW SEAL NOTFOR2019 CONSTRUCTION DUKE ENEM%w7Y® SCALE: AS SHOWN DES: VMO DWG TYPE: DWG DFTR : VMO/ANI ODECEMBER CHKD: KRD DABE 9g� ENGR: JB FILENAME: .014 FINAL GRADES- PROFILES.dwg APPD: JB DWG SIZE DRAWING NO. REVISION ANSI D 22"x34" C LS C9XX. OXX. 011 - - - - REV DATE JOB NO. 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THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY" ARE BASED ON AERIAL \ \ \ \\ \\\\ \ \ \ \\ \ \ \ \ \ \\ \ \ \\\ I\ 11 IIII DUKE DWG TYPE: DWG DFTR : VMO/ANE PHOTOGRAPHY, TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED \ \ \ \ \\ \\\\ \ \ \ \ \ \\ \\111 \ I I APPROXIMATE. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE 1 ) I \ \ \\ \\\\\ \\\\ \ \ \\\ \ \ \ \ I I I I JOB NO: 7812-19-0194 CHI I LIMITS OF CCR BOUNDARY' EXCLUDES THOSE STRUCTURES AND IS BASED ON UPDATED TOPOGRAPHIC MAPPING, REPORTED OPERATIONAL LEVELS, AND I \ \ \ \ \\ \\ \ \ \ \ \III 1 III I III III ENERGY® SUBSURFACE DATA COLLECTED WITHIN THE BASIN. IT SHOULD BE NOTED THAT THE DETERMINATION OF THE ACTUAL LATERAL EXTENT OF THE CCR MATERIALS \ \ \ \ \ \ \\\ \\\\ \ \ \ \ \\ \ \ `1 lI I I IIIII I I I NOT FOR DATE: DECEMBER 18, 2019 ENGR: JB WILL TAKE PLACE PRIOR TO, AND/OR DURING, IMPLEMENTATION. 1\ \ \ \\ \ \ \ \ \ I I I \ I 2. EXPLORATIONS PERFORMED IN ASH STORAGE AREA 2 INDICATED NO PRESENCE OF ASH, THEREFORE ASH STORAGE AREA 2 IS NOT INCLUDED IN THE ACTIVE \ \ \ \ \ \\\ \\ \\ \ \ \ \ \\ I I I I I I I III I I I I I I \ CONSTRUCTION FILENAME: .015 MAIN DAM INITIAL CONDITIONS.dwg APPD: JB ASH BASIN CLOSURE PLAN. I \ \ \ \ \ 11\\\\\ \V\\\\\\\II IIIIII�IIII\IIII\11I REFERENCES: I \ \ \ ` III \ \ \ I I I I I I I I I IWDWG SIZE DRAWING NO. REVISION 1. ASH BASIN FACILITY BOUNDARIES, BORING LOCATIONS, PIEZOMETER LOCATIONS, AND WETLAND AND SEEP LOCATIONS PROVIDED BY DUKE ENERGY. I \\ \\\\ 1 I I I II2. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON JULY 31, 2015 BY WSP. / I I 1 I I I 1 I I 1 \\ \ \\ \ \ \ I II I I I\ I I III I II I I I I II I ANSI D ____ / I III \ \ \ \ \ \ \ I IIII I I I I IIII IIII I I 22"x34" C L S C 9 XX . O XX . O 12 REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR DESCRIPTION INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7 8 9 10 0 O N F Plotted By: Ferry, Kevin Sheet Set: 781 21 901 94 - Active Ash Basin Layout:.015 MAIN DAM INITIAL CONDITIONS December 18, 2019 07: 35: 33pm Q:\Duke\CIiffSide\7812190194 - Cliffside Closure Plan\Plansheets\Active Ash Basin\.015 MAIN DAM INITIAL CONDITIONS.dwg El .013 IREV .____ BROAD RIVER 670 690 _ _ \\ \\\ ivp -700 710 _ 720 = ------ --------- --730— — � — -- -750 0 \ \ \ \ I I I \ $ICCR 04D\ I � l F I -O�CCR05D NOTE: 1. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY" ARE BASED ON AERIAL PHOTOGRAPHY, TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED \ \ \ \ APPROXIMATE. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE 1 1 1 \ \ \\ LIMITS OF CCR BOUNDARY" EXCLUDES THOSE STRUCTURES AND IS BASED ON UPDATED TOPOGRAPHIC MAPPING, REPORTED OPERATIONAL LEVELS, AND I \ \ \ \ \ SUBSURFACE DATA COLLECTED WITHIN THE BASIN. IT SHOULD BE NOTED THAT THE DETERMINATION OF THE ACTUAL LATERAL EXTENT OF THE CCR MATERIALS WILL TAKE PLACE PRIOR TO, Al DURING, IMPLEMENTATION. REFERENCES: I \ \ 1. ASH BASIN FACILITY BOUNDARIES, BORING LOCATIONS, PIEZOMETER LOCATIONS, AND WETLAND AND SEEP LOCATIONS PROVIDED BY DUKE ENERGY. I I 1 \I 2. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON JULY 31, 2015 BY WSP. I —660— — --------------- — ---- 60 0 60 120 1 N --- ----�- 1 / / /_ �_ ----- ---- --MW-� --- --_ GWA-22S�GWA-22BRU — \ / —___-- — Mw-2oDR--------------_----- — _ ———_—_—�-670= //f-------------------_ -- -- _ 680 —680- - -------- 700- —_— zz —730 740- V \ \VA \� 2:1 \ I I -760 ^/-11DA ---- / _ \ co 0 1 BRL_-- — — — — -- ----- v_ v I \VA/� ,/---------_ 3-6:1 / �780— /---$-CCR 7R o � - o o o 1 2.1 2• \ \ so.1 TITLE ACTIVE ASH BASIN COAL COMBUSTION RESIDUALS \ SURFACE IMPOUNDMENT CLOSURE PLAN wood. ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION Av \ \ v v` v v vvv v Wood Environment & MAIN DAM FINAL CONDITIONS Infrastructure Solutions, Inc. \ \ \ \ V A A 2801 YORKMONT ROAD, SUITE 100 I 1 \ \ \ V A CHARLOTTE, NC 28208 FOR LICENSURE: NC ENG: F-125 57-8600 �NC GEOLOGY: C-247 ISSUED FOR REVIEW SEAL SCALE: AS SHOWN DES: VMO D UKE DWG TYPE: DWG DFTR : VMO/ANE 2 0.1 JOB ENER("-**v ® DATE:ODECEMBER 18, 2019 El JBD NOT FOR \ CONSTRUCTION FILENAME: .016 MAIN DAM FINAL CONDITIONS.dwg APPD: JB DWG SIZE DRAWING NO. REVISION ANSI D CLS C9XX.OXX.013 REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR DESCRIPTION — 6 7 8 9 10 01 F INCHES 1 2 3 ITENTHS 10 20 30 Plotted By: Ferry, Kevin Sheet Set: 7812190194 - Active Ash Basin Layout:.016 MAIN DAM FINAL CONDITIONS December 18, 2019 07: 36: 34pm Q:\Duke\CIiffSide\7812190194 - Cliffside Closure Plan\Plansheets\Active Ash Basin\.016 MAIN DAM FINAL CONDITIONS.dwg w F 4 5 6 7 8 .014 REV .____Emmil t — — / / SUCK CREEK _ S-150 720 -O*GWA- ;10001 30 0 30 60 FT \ \ \ * / / / // / — — — — p0/ — \\_--— // / / — // ——/—'/ -- 730\ /RUTHEWf101 / U5 G?0S BMW-08S / IU-6 ---GWA2D_------------ CCRWA-65B� ----------g0---------------------�U4 GWA-65BRt_ 740— $CCR-11D — -------- —740 _----— — — — — — — — - - — — — — -- ------ — — — — — — — — — — — ------------------------------ -- — — — — — — — — — — — — — — — — — — — — — — — — ------— — — ------ — ----- — — — -------------- \—i —7°\ —— — — — --———————----_------- -------- — —-------------- — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — /�— ,---_------- —— — — — — — — — — — — — — — — — — — — — — — — — — — — — -----------_----- -- —— — — — — — — - - — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —770 ---— — — — — — — — — — —— — — — — — — — — — — — — — — — — — — — — — — — — — — 4- 11-2 AD 110DOn R- — -- — — — --- —---- -- — — — — — — — — — — — — — — — — — — — � — —\— — j \—— —/—, —/ / /—/—/ /— 770— / ------------------------------------- — — — — — — — ------- ------------------------------------------- i760— i— — — — — — — — — — — — — - ------------------------------------------------- -7-750 ------------------- — — — — — — — — — — — — — -- --------------------------_-------------------——————————————— — — — — —— — — — — — — — — — — — — —° \\�\ \ \ _\ //'//'//' ( / /// // ;/// / ////'///// / ////// //' // /// /// // / / /� //' // ' / // / //,/'/ ///// / // / // /// // / / ,/ ', ,'—'- /' // /�// �/ / / ,// //—///—// // ,/// //�l//� //'�//l /✓/ /� // / / / / �/l '�1l //� // l/�/ l/// c'/l/'' / 1'�/l l// //^/ /'/ ' /� //-' /// 1'/ /' �//' // //,l/ / /l/' // //l�' ' // /l////l// l// // � l\l/ '/ /l/// /l\'l� /ll /I lII '(/� Il, II / l� / /l // / //,/l'l\/', I l /^ ' l/ // l///J/l''/ `l'/// l/// //// / /'//'// '/ / ' \ //' //I/ 'J//v/ l'/// ,/l / /' 'l ''l l // I // I / I�'I ( I 'II /I // / / / // ,l SV /lI/ 'I \ I I I I / II/I III III �/I I / '/I ' A ' 'I/ ',' I I III I IIj II I II °I I �IIII 1I °I �I I I II I I 1 / I I II II I II I I ,II ' I I,/I I 1 II� I1 I II I I II° I 1' III II II ,I' //1' l 'I I I IIb 7NE40— / /--/ — —�------- \\\ �\�\9\ 0 —730— -- — — — — — — — — — — — — — —__-- --- -- -------------- I / 1'1 GWA51 D 720 — ' / I — — - ---------------- V I � GWA-66BRL — — — — — — — — — — — — 7 - — — — — — — — — — — — -710 L "0 °�E °° TITLEACTIVE ASH BASIN COAL COMBUSTION \\v � \R\\ \v \ E\ \ \S� \ A IID\\� I \U\ A Il � �1\ LAI � \S SURFACE IMPOUNDMENT CLOSURE PLANwood. ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION Wood Environment & UPSTREAM DAM INITIAL CONDITIONS o�E Infrastructure Solutions, Inc. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 FOR ) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 ISSUED FOR REVIEW°�TEL: (704 NOTE: SEAL SCALE: AS SHOWN DES: / \V1 1/ \ \`M ' \\o/.O 1. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY" ARE BASED ON AERIAL DUKE DWG TYPE: DWG DFTR: VMO/A I� _ I Nv ,E PHOTOGRAPHY, TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED RJOB NO: 7812-19-0194 CHKD: KRDAPPROXIMATE. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE LIMITS OF CCR BOUNDARY" EXCLUDES THOSE STRUCTURES AND IS BASED ON UPDATED TOPOGRAPHIC MAPPING, REPORTED OPERATIONAL LEVELS, AND ENE SUBSURFACE DATA COLLECTED WITHIN THE BASIN. IT SHOULD BE NOTED THAT THE DETERMINATION OF THE ACTUAL LATERAL EXTENT OF THE CCR MATERIALSINOTFOR G®DATE: DECEMBER 18,2019 ENGR: JB WILL TAKE PLACE PRIOR TO, AND/OR DURING, IMPLEMENTATION. o— 2. EXPLORATIONS PERFORMED IN ASH STORAGE AREA 2 INDICATED NO PRESENCE OF ASH, THEREFORE ASH STORAGE AREA 2 IS NOT INCLUDED IN THE ACTIVE / / / / / / / / / / / / CONSTRUCTION FILENAME: .015 UPSTREAM DAM INITIAL CONDITIONS.dwg APPD: JB ASH BASIN CLOSURE PLAN. / / / / / DWG SIZE DRAWING NO. REVISION REFERENCES: 1. ASH BASIN FACILITY BOUNDARIES, BORING LOCATIONS, PIEZOMETER LOCATIONS, AND WETLAND AND SEEP LOCATIONS PROVIDED BY DUKE ENERGY. D ANSI 2. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON JULY 31, 2015 BY WSP. / / I / / / / / / / C LS C9XX. 0XX. 014 ---- REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD EN22"x34" GR DESCRIPTION — INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7 8 9 1 0 0 F Plotted By: Ferry, Kevin Sheet Set: 7812190194 — Active Ash Basin Layout:.015 UPSTREAM DAM INITIAL CONDITIONS December 18, 2019 07: 37: 31pm 0: \Duke\CliffSide\7812190194 — Cliffside Closure Plan\Plansheets\Active Ash Basin\.015 UPSTREAM DAM INITIAL CONDITIONS.dwg w F 2 3 4 5 6 7 8 / SUCK CREEK S-150 o 720 t t $tGW^t "z t t / — — — — - - e --- — f— — — — — — — ---------- —_— — — — — — — — — — — — ----------- —730� \ \�3 �\ 730\ ��----//// / RUTHE-050-P101 ---� // // / / / GWA 20S / / — / �U-5� -7 / ° / BMW-08S GWA-20BR / / / / / / 11b X. / / �MW-08D / / / U-6 - - ---------- / / / /------------------ / / / / CCR-O WA-65B� // / 103 40,\\ \ \ / �/— _-- — o - ------— — — — — —— / /// / / GWA-65BRIL // �/ $CCR-11D -O�CCI / / -- — �0 \\ \ \ \ �� // // / / -- — — — — — / / //-------- — CD h-------_ — _ — / m 12.00%qV \\ / s 7 3:1 4:1 / 5a / .015 IREV ____ M o j 0� I 9.9:1 2.7:1 -O�CCR-1� / GWA-66BRL \ 1 O N N O \\\ \\ \ I / / o \ \ \ I 2.1:1 6,84 NOTE: 1. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" AND THE "APPROXIMATE LIMITS OF CCR BOUNDARY" ARE BASED ON AERIAL PHOTOGRAPHY, TOPOGRAPHIC MAPPING, AND OTHER HISTORICAL DRAWINGS AND INFORMATION AND SHOULD BE CONSIDERED APPROXIMATE. THE "APPROXIMATE LIMITS OF ASH BASIN FACILITY BOUNDARY" INCLUDES THE CONTAINMENT DAMS AND DIKES WHILE THE "APPROXIMATE LIMITS OF CCR BOUNDARY' EXCLUDES THOSE STRUCTURES AND IS BASED ON UPDATED TOPOGRAPHIC MAPPING, REPORTED OPERATIONAL LEVELS, AND SUBSURFACE DATA COLLECTED WITHIN THE BASIN. IT SHOULD BE NOTED THAT THE DETERMINATION OF THE ACTUAL LATERAL EXTENT OF THE CCR MATERIALS WILL TAKE PLACE PRIOR TO, AND/OR DURING, IMPLEMENTATION. REFERENCES: 1. ASH BASIN FACILITY BOUNDARIES, BORING LOCATIONS, PIEZOMETER LOCATIONS, AND WETLAND AND SEEP LOCATIONS PROVIDED BY DUKE ENERGY. 2. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON JULY 31, 2015 BY WSP. INCHES 1 2 3 TENTHS 10 20 30 REV DATE JOB NO. PROJECT TYPE 4 5 6 DES I DFTR I CHKD I ENGR DESCRIPTION wood. TITLE ACTIVE ASH BASIN COAL COMBUSTION RESIDUALS SURFACE IMPOUNDMENT CLOSURE PLAN ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION Wood Environment & Infrastructure Solutions, Inc. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL: (704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 UPSTREAM DAM FINAL CONDITIONS FOR ISSUED FOR REVIEW SEAL NOT FOR CONSTRUCTION DUKE rl ENEK%gY® SCALE: AS SHOWN DES: VMO DWG TYPE: DWG DFTR: VMO/ANI JOB ODECEMBER DATE: 118, 2019 ENGR: JBD FILENAME: .018 UPSTREAM DAM FINAL CONDITIONS.dwg APPD: JB DWG SIZE DRAWING NO. REVISION ANSI D 22"x34" C LS C9XX. 0XX. 015 ---- 8 9 10 F Plotted By: Ferry, Kevin Sheet Set: 7812190194 — Active Ash Basin Layout:.018 UPSTREAM DAM FINAL CONDITIONS December 18, 2019 07: 38: 28pm Q:\Duke\CIiffSide\7812190194 — Cliffside Closure Plan\Plansheets\Active Ash Basin\.018 UPSTREAM DAM FINAL CONDITIONS.dwg .016 REV .____ A v�GECP�NO g-\N SSE // 0.5'i ///////%/%/%/%/%%/%/%�!� /i�/�/�//%/�/�/�//%/�/�/ //////// / / /pp uP // / 8 OZ/SY NON -WOVEN GEOTEXTILE 0 0 0 0 0 0 ��pMPP 06 Pp�• •/ ///// /////�/�////�/�/�/�/� / / / / / / / / / / / / / ,% �� / of,%/% ///%�/ /-EOM g SN j NOTES: NOTES: 1. THE THICKNESS OF VEGETATIVE SOIL COVER SHALL BE MEASURED FROM THE TOP OF THE BOTTOM OF ASH/RESIDUAL 1. THE THICKNESS OF CLEAN SOIL COVER SHALL BE MEASURED FROM THE TOP OF THE BOTTOM OF ASH/RESIDUAL MATERIAL TO THE TOP OF THE VEGETATIVE SOIL COVER IN THE VERTICAL DIRECTION. MATERIAL TO THE TOP OF THE CLEAN SOIL COVER IN THE VERTICAL DIRECTION. 2. THE THICKNESS OF CLASS B RIPRAP COVER SHALL BE MEASURED FROM THE TOP OF THE CLEAN SOIL COVER TO THE TOP OF THE CLASS B RIPRAP COVER IN THE VERTICAL DIRECTION. TYPICAL SOIL COVER SYSTEM SCALE: 1" = 1' SPECIFICATIONS SEEDBED REQUIREMENTS Establishment of vegetation should not be attempted on sites that are unsuitable due to excessive soil compaction, inappropriate soil texture, poor drainage, concentrated overland flow, or steepness of slope until measures have been taken to correct these C problems. To maintain a good stand of vegetation, the soil must meet certain minimum requirements as a growth medium. The existing soil should have these criteria: • Enough fine-grained (silt and clay) material to maintain adequate moisture and nutrient supply (available water capacity of at least .05 inches water to 1 inch of soil). • Sufficient pore space to permit root penetration. • Sufficient depth of soil to provide an adequate root zone. The depth to rock or impermeable layers such as hardpans should be 12 inches or more, except on slopes steeper than 2:1 where the addition of soil is not feasible. • A favorable pH range for plant growth, usually 6.0 - 6.5. • Free from large roots, branches, stones, large clods of earth, or trash of any kind. Clods and stones may be left on slopes steeper than 3:1 if they are to be hydro seeded. If any of the above criteria are not met - i.e., if existing soil is too coarse, dense, shallow or acidic to foster vegetation - special amendments are required. The soil conditioners described below may be beneficial or, preferably, topsoil may be applied. SEEDBED PREPARATION Install necessary mechanical erosion and sedimentation control practices before seeding, and complete grading according to the D approved plan. Lime and fertilizer needs should be determined by soil tests. Directions, sample cartons, and information sheets are available through county Agricultural Extension offices. Testing is also done by commercial laboratories. When soil tests results are not available, follow rates suggested in the seeding specifications shown at right. Application rates usually fall into the following ranges: • Ground agricultural limestone: Light -textured, sandy soils: 1 to 1-1/2 tons/acre Heavy -textured, clayey soils: 2-3 tons/acre • Fertilizer: Grasses: 800-1200 lb/acre of 10-10-10 (or the equivalent) Grass -legume mixtures: 800-1200 lb/acre of 5-10-10 (or the equivalent) Apply lime and fertilizer evenly and incorporate into the top 4-6 inches of soil by disking or other suitable means. Operate machinery on the contour. When using a hydro seeder, apply lime and fertilizer to a rough, loose surface. Roughen surfaces prior to seeding. Complete seedbed preparation by breaking up large clods and raking into a smooth, uniform surface (slopes less than 3:1). Fill in or level depressions that can collect water. Broadcast seed into a freshly loosened seedbed that has not been sealed by rainfall. SEEDING Seeding dates given in the seeding mixture specifications are designated as "best" or "possible". Seedings properly carried out E within the "best" dates have a high probability of success. It is also possible to have satisfactory establishment when seeding outside these dates. However, as you deviate from them, the probability of failure increases rapidly. Seeding on the last date shown under "possible" may reduce changes of success by 30-50%. Always take this into account in scheduling land -disturbing activities. Use certified seed for permanent seeding whenever possible. Labeling of non -certified seed is also required by law. Labels contain important information on seed purity, germination, and presence of wood seeds. Seeds must meet State standards for content of noxious weeds. Do no accept seed containing "prohibited" noxious weed seed. Inoculate legume seed with the Rhizobium bacteria appropriate to the species of legume. Apply seed uniformly with a cyclone seeder, drop -type spreader, drill, cultipacker seeder, or hydro seeder on a firm, friable seedbed. When using a drill or cultipacker seeder, plant small grains no more than 1 inch deep, grasses and legumes no more than 1/2 inch. Equipment should be calibrated in the field for the desired seeding rate. When using broadcast -seeding methods, subdivide the area into workable sections and determine the amount of seed needed for each section. Apply one-half the seed while moving back and forth across the area, making a uniform pattern: then apply the second half in the same way, but moving at right angles to the first pass. F Mulch all plantings immediately after seeding. HYDRO SEEDING Surface roughening is particularly important when hydro seeding, as a roughened slope will provide some natural coverage for lime, fertilizer, and seed. The surface should not be compacted or smooth. Fine seedbed preparation is not necessary for hydro seeding operations: large clods, stones, and irregularities provide cavities in which seeds can lodge. Rate of wood fiber (cellulose) application should be at least 2,000 lb/acre. Apply legume inoculants at four times the recommended rate when adding inoculant to a hydro seeder slurry. If a machinery breakdown of 1/2 to 2 hours occurs, add 50% more seed to the tank, based on the proportion of the slurry remaining. This should compensate for damage to seed. Beyond 2 hours, a full rate of new seed may be necessary. Lime is not normally applied with a hydraulic seeder because it is abrasive. It can be blown onto steep slopes in dry form. ('-4 SEEDING SPECIFICATIONS 016 NTS INCHES 1 2 3 ITENTHS 10 20 2 TYPICAL RIPRAP COVER SYSTEM .016 SCALE: 1" = 1' MAINTENANCE Generally, a stand of vegetation cannot be determined to be fully established until soil cover has been maintained for one full year from planting. Inspect seeded areas for failure and make necessary repairs and reseedings within the same season, if possible. Reseeding --If a stand has inadequate cover, re-evaluate choice of plant materials and quantities of lime and fertilizer. Re-establish the stand after seedbed preparation or over- seed the stand. Consider seeding temporary, annual species if the time of year is not appropriate for permanent seeding. If vegetation fails to grow, soil must be tested to determine if acidity or nutrient imbalance is responsible. Fertilization --On the typical disturbed site, full establishment usually requires re -fertilization in the second growing season. Fine turf requires annual maintenance fertilization. Use soil tests if possible or follow the guidelines given for the specific seeding mixture. TEMPORARY SEEDING SPECIFICATIONS Seedina mixture (fall Species' Rate (lb/acre) Rye Grain (Seca/e cereal&) 120 Seeding Mixture (late winter early spring) Species" Rate (lb/acre) Rye Grain (Secale cereale) 120 Seeding mixture (summer) Species' Rate (lb/acre) German Millet (Setaria/tallca) 40 Seeding dates (Piedmont) Fall: Aug. 15 - Dec. 30 Late winter (early spring): Jan. 1 - May 1 Late Summer: May 1 - Aug. 15 Soil amendments Follow recommendations of soil tests or apply 2,000 lb/acre ground agricultural limestone and 750 lb/acre 10-10-10 fertilizer Mulch Apply 4,000 lb/acre straw. Anchor mulch by tacking with asphalt, roving or a mulch anchoring tool. A disk with blades set nearly straight can be used as a mulch anchoring. tool. Maintenance Re -fertilize if growth is not fully adequate. Reseed, re -fertilize and mulch immediately following erosion or other damage. Pursuant to G.S. 113A-57(2), the angle for graded slopes and fills shall be no greater than the angle that can be retained by vegetative cover or other adequate erosion -control devices or structures. In any event, 3HAV or greater slopes left exposed will, within 7 calendar days of completion of any phase of grading, be planted or otherwise provided with temporary or permanent ground cover, devices, or structures sufficient to restrain erosion. Pursuant to G.S. 113A-57(3), provisions for permanent groundcover sufficient to restrain erosion must be accomplished for all disturbed areas within 14 working days following completion of construction or development. 'REF: 6.10 A,B and C, NC Erosion and Sediment Control Planning and Design Manual, 2013 PERMANENT SEEDING SPECIFICATIONS Seedina mixture Species' Rate (lb/acre) Tall fescue (Festuca arundinacea) (Grass lined Channels) 200 Tall fescue (Festuca arundinacea) (Other Areas) 100 Nurse plants Between May 1 and Aug. 15, add 10 lb/acre German millet (Setaria italica) or 15 lb/acre Sudan grass. Prior to May 1 or after Aug 15, add 40 lb/acre Rye Grain (Festuca arundinacea ). Seeding dates Best Possible Fall: Aug. 25 - Sept. 15 Aug. 20 - Oct. 25 Late winter: Feb. 15 - Mar. 21 Feb. 1 -Apr. 15 Soil amendments Apply lime and fertilizer according to soil tests, or apply 4,000 lb/acre ground agricultural limestone and 1,000 lb/acre 10-10-10 fertilizer. Mulch Apply 4,000-5,000 lb/acre grain straw or equivalent cover of another suitable mulching material. Anchor mulch by tacking with asphalt, roving, or netting. Netting is the preferred anchoring method on steep slopes. Maintenance Re -fertilize in the second year unless growth is fully adequate. May be mowed once or twice a year, but mowing is not necessary Reseed, fertilize, and mulch damaged areas immediately. Pursuant to G.S. 113A-57(3), provisions for permanent groundcover sufficient to restrain erosion must be accomplished for all disturbed areas within 14 working days. 'REF: 6.11 L NC Erosion and Sediment Control Planning and Design Manual, 2013 30 4 5 REV I DATE I JOB NO 10 PROJECT TYPE T 6 DES I DFTR I CHKD I ENGR VARIES p\L COS O LEP �y G-1P�\v0 E21 �GOM C106 gAA Isee 0.5' p ;/ / e° °),\I �%%j%j �P p\ ///////// / /// /// NOTES: 1. THE THICKNESS OF CLEAN SOIL COVER SHALL BE MEASURED FROM THE TOP OF THE BOTTOM OF ASH/RESIDUAL MATERIAL TO THE TOP OF THE CLEAN SOIL COVER IN THE VERTICAL DIRECTION. 2. THE THICKNESS OF VEGETATIVE SOIL COVER SHALL BE MEASURED FROM THE TOP OF THE CLEAN SOIL COVER TO THE TOP OF THE VEGETATIVE SOIL COVER IN THE VERTICAL DIRECTION. TYPICAL OVEREXCAVATION SOIL COVER SYSTEM SCALE: 1" = 1' w Q 26' EXISTING GRADE/ BOTTOM OF ASH ------------ ■ I 5 CHANNEL GEOMETRY (AREAS OF CUT) .016 N.T.S. EXISTING GRADE/ BOTTOM OF ASH 10 1 1 13 > 13 1 26' / r6') CHANNEL GEOMETRY (AREAS OF FILL) .016 N.T.s. TITLE ACTIVE ASH BASIN COAL COMBUSTION RESIDUALS wood. SURFACE IMPOUNDMENT CLOSURE PLAN ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION Wood Environment & DETAILS 1 Infrastructure Solutions, Inc. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 FOR TEL: (704) 357-8600 FAX: (704) 357-8638 ISSUED FOR REVIEW LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 SEAL SCALE: AS SHOWN DES: VMO DFTR: DUKE DWG TYPE: DWG VMO/ANI JOB O ENERGY, NOT FOR DATE:DECEMBER 118, 2019 ENGR: JBD CONSTRUCTION FILENAME: .017 DETAILS 1.dwg APPD: JB DWG SIZE DRAWING NO. REVISION ANSI D 22"x34" ---- C LS C9XX. OXX. 016 DESCRIPTION 7 8 9 10 0 0 rn F Plotted By: Ferry, Kevin Sheet Set: 7812190194 — Active Ash Basin Layout:.017 DETAILS 1 December 18, 2019 07: 38: 45pm 0: \Duke\CliffSide\7812190194 — Cliffside Closure Plan\Plansheets\Active Ash Basin \.017 DETAILS 1.cwg 3 1 5 6 7 8 I .017 REV .____ 3 1 DS75 MATTING OR EQUIVALENT EXISTING GROUND GENERAL NOTES: 1. DIVERSION BERM SHALL BE INSTALLED TO CONVEY RUNOFF TO SEDIMENT BASIN. 2. DIVERSION BERM SHALL BE INSTALLED IN GENERAL LOCATIONS WHERE SHOWN ON THE DRAWINGS WITH A MINIMUM OF 1% AND MAXIMUM OF 3% LONGITUDINAL SLOPE. 3. MATTING SHOULD BE USED IN GENERAL ACCORDANCE WITH DETAIL 3/.020 EROSION CONTROL MATTING. INSPECTION AND MAINTENANCE NOTES: 1. ALL EROSION AND SEDIMENTATION CONTROL DEVICES AND PLANTED AREAS SHALL BE INSPECTED EVERY SEVEN (7) CALENDAR DAYS AND AFTER EACH RAINFALL OCCURRENCE THAT EXCEEDS ONE (1) INCH WITHIN A 24-HOUR PERIOD. DAMAGED OR INEFFECTIVE DEVICES SHALL BE REPAIRED OR REPLACED, AS NECESSARY, AS SOON AS PRACTICAL. 2. REMOVE ACCUMULATED SEDIMENT WHEN IT REACHES 1/3 THE HEIGHT OF THE DEVICE. 3. REMOVED SEDIMENT SHALL BE PLACED IN STOCKPILE STORAGE AREAS OR SPREAD THINLY ACROSS DISTURBED AREA. STABILIZE THE REMOVED SEDIMENT AFTER IT IS RELOCATED. 4. REMOVE TEMPORARY E&SC MEASURES UPON STABILIZATION OF THE TRIBUTARY DRAINAGE AREA. REMOVE ALL CONSTRUCTION MATERIAL AND SEDIMENT, AND DISPOSE OF THEM PROPERLY. GRADE THE DISTURBED AREA TO DRAIN AND STABILIZE ACCORDINGLY. BROW DIVERSION BERM (FIELD -LOCATE AS NEEDED) N.T.S. DIRECTION OF STREAM FLOW IN CHANNELS, ROLL OUT STRIPS OF MATTING PARALLEL TO THE DIRECTION OF FLOW. ANCHOR MATTING IN A 12" TRENCH DITCH OR CHANNEL INSTALLATION SLOPE INSTALLATION JOIN STRIPS BY ANCHORING AND OVERLAPPING iGE OF MATTING GENERAL NOTES: 1. EROSION CONTROL MATTING SHALL BE INSTALLED WHERE SHOWN ON THE DRAWINGS AND AS NEEDED BASED ON FIELD CONDITIONS. 2. EROSION CONTROL MATTING INSTALLED ON SLOPES SHALL BE TENSAR DS-75 MATTING OR APPROVED EQUIVALENT. 3. EROSION CONTROL MATTING INSTALLED IN CHANNELS SHALL BE TENSAR DS-75 MATTING OR APPROVED EQUIVALENT. 4. MATTING SHALL BE INSTALLED SUCH THAT MATERIAL IS IN INTIMATE CONTACT WITH GROUND SURFACE OVER ENTIRE COVERED AREA AND SHALL BE MAINTAINED UNTIL VEGETATIVE COVER IN AREA HAS BEEN ESTABLISHED. 5. MATTING SHALL BE INSTALLED AND MAINTAINED PER DETAILS SHOWN AND SECTION 6.17 OF THE MAY 2013 NCDEQ "EROSION AND SEDIMENT CONTROL PLANNING AND DESIGN MANUAL." F 6. SEEDING AND MULCHING SHALL OCCUR, WHERE APPLICABLE, PRIOR TO INSTALLATION OF MATTING. 7. IN DITCHES OR CHANNELS, MATTING SHALL BE OVERLAPPED SUCH THAT UPSTREAM PIECE OVERLIES DOWNSTREAM PIECE. INSPECTION AND MAINTENANCE NOTES: 1. ALL EROSION AND SEDIMENTATION CONTROL DEVICES AND PLANTED AREAS SHALL BE INSPECTED EVERY SEVEN (7) CALENDAR DAYS AND AFTER EACH RAINFALL OCCURRENCE THAT EXCEEDS ONE-HALF (1/2) INCH WITHIN A 24-HOUR PERIOD. DAMAGED OR INEFFECTIVE DEVICES SHALL BE REPAIRED OR REPLACED, AS NECESSARY, AS SOON AS PRACTICAL. 2. MATTING MAY REMAIN IN PLACE UPON STABILIZATION OF THE TRIBUTARY DRAINAGE AREA. ('3 EROSION CONTROL MATTING (AS NEEDED) 0 1 7 N.T.S. 12" DIAMETER COMPOST SOCK CHECK DAM TWO (2) 2" X 2" WOODE STAKES PLACED 4' O.( 2:1 MAX. SLOPE TWO (2) 2" X 2" WOODEN STAKES PLACED 8' O.C. STE WIRE FENCING (IF USED) WOVEN FILTER FABRIC 0 N GENERAL NOTES: WIRE FENCING (IF USED) Z FILTER FABRIC M J COMPACTED FILL f NLL FLOW L SLOPE 4" MIN. u 1. SEDIMENT FENCE SHALL BE INSTALLED WHERE SHOWN ON THE DRAWINGS AND AS NEEDED BASED ON FIELD CONDITIONS. 2. WIRE FENCING SHALL BE A MINIMUM OF 32" IN WIDTH, BE AT LEAST #10 GAGE, WITH A MINIMUM OF 6 LINE WIRES WITH 12" STAY SPACING. WIRE MESH SHALL BE MIN. 13 GAGE WITH MAXIMUM 12" OPENINGS. 3. WOVEN FILTER FABRIC BE USED WHERE SILT FENCE IS TO REMAIN FOR A PERIOD OF MORE THAN 30 DAYS. 4. STEEL POSTS SHALL BE 5-0" IN HEIGHT AND BE OF THE SELF -FASTENER ANGLE STEEL TYPE. 5. TURN SILT FENCE UP SLOPE AT ENDS. 6. ORANGE SAFETY FENCE IS REQUIRED AT BACK OF SILT FENCE WHEN GRADING IS ADJACENT TO SWIM BUFFERS, STREAMS OR WETLANDS (REFER TO SWIM BUFFER GUIDELINES). THE COLOR ORANGE IS RESERVED FOR VISUAL IDENTIFICATION OF ENVIRONMENTALLY SENSITIVE AREAS. 7. DRAINAGE AREA CANNOT BE GREATER THAN 1/4 ACRE PER 100 FT OF FENCE. MAX WATER LEVEL 4" MINIMUM FREEBOARD 12" DIAMETER COMPOST SOCK SINGLE INSTALLATION SECTION GENERAL NOTES: 1. COMPOST SOCKS SHALL BE INSTALLED AS NEEDED BASED ON FIELD CONDITIONS. 2. ADJOINING SECTIONS OF THE COMPOST SOCKS SHALL BE OVERLAPPED A MINIMUM 18 INCHES AND STAKED AT THE OVERLAP. 3. STAKES SHALL BE DRIVEN TO A MINIMUM DEPTH OF 12 INCHES WITH A MINIMUM 3 INCHES PROTRUDING ABOVE THE COMPOST SOCK. 4. IN AREAS OF DIFFICULT SILT FENCE INSTALLATION AND ONLY WITH THE APPROVAL OF THE ENGINEER, COMPOST FILTER SOCK MAY BE SUBSTITUTED FOR SILT FENCE. TEMPORARY SILT FENCE N.T.S. STABILIZE DISCHARGE ARE INSPECTION AND MAINTENANCE NOTES: 2:1 MAX. SLOPE UNDISTURBED AREA Vr 1. ALL EROSION AND SEDIMENTATION CONTROL DEVICES AND PLANTED AREAS SHALL BE INSPECTED EVERY SEVEN (7) CALENDAR DAYS AND AFTER EACH RAINFALL OCCURRENCE THAT EXCEEDS ONE-HALF (1/2) INCH WITHIN A 24-HOUR PERIOD. DAMAGED OR INEFFECTIVE DEVICES SHALL BE REPAIRED OR REPLACED, AS NECESSARY, AS SOON AS PRACTICAL. 2. REMOVE ACCUMULATED SEDIMENT WHEN IT REACHES 1/3 THE HEIGHT OF THE DEVICE. 3. REMOVED SEDIMENT SHALL BE PLACED IN STOCKPILE STORAGE AREAS OR SPREAD THINLY ACROSS DISTURBED AREA. STABILIZE THE REMOVED SEDIMENT AFTER IT IS RELOCATED. 4. REMOVE TEMPORARY E&SC MEASURES UPON STABILIZATION OF THE TRIBUTARY DRAINAGE AREA. REMOVE ALL CONSTRUCTION MATERIAL AND SEDIMENT, AND DISPOSE OF THEM PROPERLY. COMPOST SOCKS MAY BE ABANDONED BY CUTTING THE SOCK MATERIAL AND SPREADING THE COMPOST IN -PLACE. GRADE THE DISTURBED AREA TO DRAIN AND STABILIZE ACCORDINGLY. MAX WATER LEVEL 4" MINIMUM FREEBOARD PYRAMID INSTALLATION SECTION 5' AT HIGH END OF DEVICE POINTED UPHILL TO PREVENT END -AROUND FLOW 12" DIAMETER COMPOST SOCK 2" WOODEN STAKES 12" DIAMETER COMPOST SOCK THREE (3) 2" X 2" WOODEN STAKES PLACED 8' O.C. 4 TEMPORARY COMPOST FILTER SOCK ,O j7N.T.S. TITLE ACTIVE ASH BASIN COAL COMBUSTION RESIDUALS SURFACE IMPOUNDMENT CLOSURE PLAN wood ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION Wood Environment & DETAILS 2 Infrastructure Solutions, Inc. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, INC 28208 FOR TEL: (704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 ISSUED FOR REVIEW SEAL SCALE: AS SHOWN DES: VMO NOT FOR CONSTRUCTION IREVI DATE I JOB NO. I PROJECT TYPE DES DFTR CHKD ENGR DESCRIPTION INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7 8 DUKE DWG TYPE: DWG DFTR: VMO/ANE ENER1GYX/ JOB ODECEMBER 118, 2019 ENGR: JBD T. DATE: FILENAME: .018 DETAILS 2.dwg APPD: JB DWG SIZE DRAWING NO. REVISION ANSI D C LS C9XX. OXX. 017 9 10 1 1 1 1 F Plotted By: Ferry, Kevin Sheet Set: 7812190194 - Active Ash Basin Layout:.018 DETAILS 2 December 18, 2019 07: 39: 01 pm Q:\Duke\CIiffSide\7812190194 - Cliffside Closure Plan\Plansheets\Active Ash Basin\.018 DETAILS 2.dwg