3612_Allen_ModifiedClosurePlan_Rev2_AppendixD_FID1897222_20230731

ALN C999.001 .011
mv• 2
INCHES
DUKE ENERGY
ALLEN STEAM STATION
COAL COMBUSTION RESIDUALS SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS
LANDFILL
RAB DAM STATE ID
AAB DAM STATE ID
NPDES
NPDES
RETIRED ASH BASIN LANDFILL
NORTH STARTER LANDFILL
SOUTH STARTER LANDFILL
ASH BASIN LANDFILL
CANAL ROAD LANDFILL
CLOSURE BY EXCAVATION
RETIRED ASH BASIN (RAB) AND ACTIVE ASH BASIN (AAB)
GASTON COUNTY, NORTH CAROLINA
PERMIT NO.
GASTO-016
GASTO-061
NC0004979
NCS000546
3612-INDUS
3619-INDUS
3620-INDUS
3621-INDUS
3623-INDUS
jp
�; > ,� �! L �� �� • ��_� �,� RAB
CATAWBA RIVER/
LAKE WYLIE
AABIQ-
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IN
SITE LOCATION MAP
0 2000 4000 6000
GRAPHIC SCALE (IN FEET)
TENTHS 10
�a
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f7
N PLANT ALLEN ROAD
BELMONT, NORTH CAROLINA 28012
0
JULY 27, 2023
DRAWING NO. DRAWING DESCRIPTION
ALN_C999.001.011
ALN_C999.001.012
ALN_C999.001.013A
ALN_C999.001.013B
ALN_C999.001.014A
ALN
C999.001.014B
ALN
C999.001.015
ALN
C999.001.016
ALN_C999.001.017
ALN_C999.001.018
ALN_C999.001.019
ALN_C999.001.020
ALN_C999.001.021
ALN_C999.001.022
ALN
C999.001.023
ALN
C999.001.024
ALN_C999.001.025
ALN_C999.001.026
ALN_C999.001.027
ALN_C999.001.028
ALN_C999.001.029
ALN_C999.001.030
ALN
C999.001.031
ALN
C999.001.032
ALN_C999.001.033
ALN_C999.001.034
ALN_C999.001.035
ALN_C999.001.036
ALN_C999.001.037
ALN_C999.001.038
ALN
C999.001.039
ALN
C999.001.040
ALN_C999.001.041
A
ALN_C999.001.041
B
ALN_C999.001.042
ALN_C999.001.043
ALN_C999.001.044
ALN_C999.001.045
COVER SHEET
GENERAL NOTES
EXISTING CONDITIONS PLAN WITH AERIAL MAP - ASH BASINS
EXISTING CONDITIONS PLAN WITH AERIAL MAP - LRB AND STATION
EXISTING CONDITIONS PLAN (300 SCALE) - ASH BASINS
EXISTING CONDITIONS PLAN (300 SCALE) - LRB AND STATION
EXISTING CONDITIONS PLAN (200 SCALE) - LRB AND STATION
EXISTING CONDITIONS PLAN (200 SCALE) - RETIRED ASH BASIN
EXISTING CONDITIONS PLAN (200 SCALE) - ACTIVE ASH BASIN
SUBSURFACE EXPLORATION LOCATION PLAN - LRB AND STATION
SUBSURFACE EXPLORATION LOCATION PLAN - RETIRED ASH BASIN
SUBSURFACE EXPLORATION LOCATION PLAN - ACTIVE ASH BASIN
ESTIMATED BOTTOM OF ASH CONTOUR MAP
ESTIMATED BOTTOM OF ASH CONTOUR MAP - RETIRED ASH BASIN
ESTIMATED BOTTOM OF ASH CONTOUR MAP - ACTIVE ASH BASIN
DEMOLITION PLAN - LRB AND STATION
DEMOLITION PLAN - RETIRED ASH BASIN
DEMOLITION PLAN - ACTIVE ASH BASIN
FINAL CLOSURE GRADING PLAN - ASH BASINS
FINAL CLOSURE GRADING PLAN - RETIRED ASH BASIN
FINAL CLOSURE GRADING PLAN - ACTIVE ASH BASIN
FINAL SURFACE WATER MANAGEMENT PLAN - ASH BASINS
FINAL CLOSURE GRADING CROSS SECTION LAYOUT PLAN
FINAL CLOSURE GRADING CROSS SECTIONS I
FINAL CLOSURE GRADING CROSS SECTIONS II
FINAL CLOSURE GRADING CROSS SECTIONS III
FINAL CLOSURE GRADING CROSS SECTIONS IV
FINAL CLOSURE GRADING CROSS SECTIONS V
FINAL CLOSURE GRADING CROSS SECTIONS VI
FINAL CLOSURE GRADING CROSS SECTIONS VII
FINAL CLOSURE GRADING CROSS SECTIONS VIII
FINAL CLOSURE GRADING DETAIL
ON -SITE LANDFILL SCHEMATIC PLAN - ASH BASINS
ON -SITE LANDFILL SCHEMATIC PLAN - LRB AND STATION
ON -SITE LANDFILL SCHEMATIC PLAN - ABLF CROSS SECTIONS
ON -SITE LANDFILL SCHEMATIC PLAN - NSLF CROSS SECTIONS
ON -SITE LANDFILL SCHEMATIC PLAN - SSLF CROSS SECTIONS
ON -SITE LANDFILL SCHEMATIC PLAN - CLF CROSS SECTIONS
PREPARED FOR:
DUKE ENERGY (OWNER)
400 SOUTH TRYON ST.
CHARLOTTE, NC 28202
PREPARED BY:
AECOM
JAY D. MOKOTOFF, P.E.
1300 E. 9TH ST., SUITE 500
CLEVELAND, OH 44114
PHONE: [phone]
N
SITE OVERVIEW MAP
0 1000 2000 3000
GRAPHIC SCALE (IN FEET)
REV I DATE I JOB NO. I PROJECT TYPE I DES I DFTR I CHKD I ENG I APPD I DESCRIPTION
2 1 07/27/23 160702384 1 AB CLOSURE I NSF I SVV I JDM I JDM I JDM I ISSUED FOR APPROVAL
P"=com
SEAL
N.C. ENGINEERING LICENSE NO.
F-0342
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c- 043997 '_ =
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TITLE
LAT: N 35.180
LONG: W 81.01 °
NOT FOR CONSTRUCTION
COVER SHEET
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
FOR ISSUED FOR APPROVAL
I� SCALE: AS SHOWN DES: NSF
DUKE
DWG TYPE:.DWG DFTR: SVV
JOB NO:
ENPR GY® DATE: 077027382023 ENGR : JDM
FILENAME: ALN C999.001 .011 COVER SHEET . DWG APPD: JDM
DWG SIZE DRAWING NO. REVISION
ANSI 22.0"x34.0" ALN C999.001 .011 2
1) 10
1

GENERAL NOTES
ALN C999.001.012
ay. 2
1. PURPOSE
1.1. THIS DRAWING SET IS INTENDED FOR APPROVAL PURPOSES ONLY. IT WILL BE FURTHER DEVELOPED DURING THE
DESIGN PROCESS TO PREPARE CONSTRUCTION LEVEL DRAWINGS.
1.2. INFORMATION REGARDING THE PROPOSED ON -SITE LANDFILLS ARE CONCEPTUAL AND PROVIDED FOR INFORMATIONAL
PURPOSES ONLY. LANDFILL EXTENTS AND DESIGN DETAILS WILL BE INCLUDED IN A LANDFILL PERMIT APPLICATION TO BE
SUBMITTED TO THE NCDEQ SOLID WASTE SECTION UNDER SEPARATE COVER. THE NORTH STARTER LANDFILL (NSLF) AND
SOUTH STARTER LANDFILL (SSLF) ALREADY HAVE PTC, ADDITIONAL DETAIL ON THE CANAL ROAD LANDFILL (CLF) AND THE
ASH BASIN LANDFILL (ABLF) WILL BE PROVIDED LATER.
1.3. A CONCEPTUAL DAM BREACH IS REPRESENTED ON THE DRAWINGS FOR INFORMATION PURPOSES ONLY DUE TO ITS
INTERRELATION TO THE CLOSURE DESIGN. A COMPLETE DAM DECOMMISSIONING PERMIT APPLICATION WITH
ADDITIONAL DESIGN DETAIL AND/OR CHANGES WILL BE PROVIDED (IF NECESSARY) UNDER SEPARATE COVER AT A LATER
DATE YET TO BE DETERMINED.
2. PRELIMINARY CONSTRUCTION SEQUENCE:
2.1. REMOVE FREE WATER BY USING FLOATING PUMPS WITH SCREENED INTAKES AND ROUTE TO TEMPORARY WASTE WATER
TREATMENT SYSTEM INSTALLED TO MEET NPDES PERMIT REQUIREMENTS FOR FREE WATER REMOVAL (I.E. DECANTING).
PROCESS WATER FLOWS INTO THE ASH BASIN HAVE BEEN DIVERTED TO THE LINED RETENTION BASIN SYSTEM (LRB) AS
OF FEBRUARY 9TH, 2019 AND WILL BE DIVERTED TO THE EXISTING WWTS PAD PRIOR TO CONSTRUCTION OF THE CANAL
ROAD LANDFILL (CLF).
2.2. INSTALL A PORE WATER REMOVAL/DEWATERING SYSTEM TO SUPPORT EXCAVATION AND CONSTRUCTION ACCESS.
2.3. START ASH EXCAVATION FROM THE PROPOSED CLOSURE BY EXCAVATION AREAS WHERE THE FUTURE ON -SITE LANDFILL
INITIAL CELL IS PROPOSED. EXCAVATED ASH TO BE TAKEN TO THE TWO INITIAL LANDFILLS THE NORTH STARTER
LANDFILL (NSLF) AND SOUTH STARTER LANDFILL (SSLF) AND THEN TO THE CLF AND ABLF AS APPLICABLE.
INSTRUMENTATION AND MONITORING REQUIREMENTS TO BE DEVELOPED PRIOR TO CONSTRUCTION WILL BE FOLLOWED
TO VERIFY CONSTRUCTION PHASE STABILITY. CONSTRUCTION DEWATERING TO BE PERFORMED IN ACCORDANCE WITH
DETAILED PLANS AND SPECIFICATIONS TO BE DEVELOPED PRIOR TO CONSTRUCTION.
2.4. CONSTRUCT STORMWATER DIVERSION AREAS AND INITIAL PROPOSED ON -SITE LANDFILL CELL. PLACE THE PROCESSED
EXCAVATED ASH IN THE CONSTRUCTED ON -SITE LANDFILL CELL.
2.5. PROCEED WITH ON -SITE LANDFILL CELL CONSTRUCTION WITHIN THE EXCAVATED PORTIONS OF THE ASH BASIN AND
SEQUENCE ASH EXCAVATION TO PLACE THE EXCAVATED ASH INTO THE PROPOSED ON -SITE LANDFILL. DEWATERING OF
THE ASH WILL BE NEEDED TO MEET THE COMPACTION REQUIREMENTS FOR LANDFILL PLACEMENT. COMPLETE ASH
EXCAVATION AS VISUALLY VERIFIED AND AS CONFIRMED BY GRID SOIL SAMPLING/TESTING PROGRAM.
2.6. START REMOVAL OF THE ASH BASIN DAMS. USE APPROVED PORTIONS OF THE DAM SOIL FOR FINAL COVER OF THE
PROPOSED ON -SITE LANDFILL, STORMWATER BASIN BERMS, AND GRADING FILL WITHIN THE EXCAVATED ASH BASIN.
SEQUENCE DAM BREACHING WITH CONSTRUCTION OF PROPOSED STORMWATER DETENTION AND RETENTION BASINS. IN
ADDITION, SEQUENCE DAM BREACHING TO FOLLOW REGULATORY REQUIREMENTS FOR INFLOW DESIGN FLOOD
MANAGEMENT. DETAILED CONSTRUCTION SEQUENCING PLAN TO BE DEVELOPED PRIOR TO CONSTRUCTION AND
FOLLOWED.
2.7. COMPLETE DAM BREACHES. COMPLETE CLOSURE BY EXCAVATION VERIFICATION BY GRID SOIL SAMPLING/TESTING
PROGRAM. COMPLETE CONSTRUCTION OF PROPOSED SURFACE WATER DETENTION AND RETENTION BASINS. COMPLETE
CLOSURE OF THE PROPOSED ON -SITE LANDFILL.
3. DATUM
3.1. ALL ELEVATIONS SHOWN IN THESE DRAWINGS ARE REFERENCED TO NORTH AMERICAN VERTICAL DATUM, 1988 (NAVD).
ELEVATIONS ARE IN FEET.
3.2. HORIZONTAL DATUM (SHOWN IN FEET): NORTH AMERICAN DATUM, 1983 (NAD83 NC STATE PLANES).
4. REFERENCES
4.1. THE EXISTING SURVEY INFORMATION (TOPOGRAPHY, PLANIMETRICS, ETC.) IS BASED ON A COMBINATION OF THE
TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015, MORGAN CORP IN NOVEMBER 2018, STEWART INC IN
JUNE 2020, AND GPI IN SEPTEMBER 2021.
4.2. CONTOURS DEPICTED BENEATH THE WATER SURFACE WERE OBTAINED FROM AMEC'S WASTE STRATEGY ANALYSIS
REPORT DATED APRIL 2015.
4.3. SURFACE WATER ELEVATIONS PRESENTED IN THESE DRAWINGS ARE BASED ON THE TOPOGRAPHIC SURVEY
PERFORMED BY WSP IN FEBRUARY 2015.
4.4. HISTORICAL 5 FOOT CONTOURS WERE DIGITIZED FROM DUKE DRAWING NO. A3350-1B TITLED "ASH STORAGE BASIN,
GENERAL PLAN, AS BUILT TOPOGRAPHY" -PREPARED BY DUKE POWER COMPANY, DATED 11-11-1975. VERTICAL DATUM
CONVERTED FROM NGVD29 TO NAVD88 (DATUM SHIFT OF -0.75 FEET WAS APPLIED). THE HISTORICAL CONTOURS ARE
ASSUMED TO BE SYNONYMOUS WITH THE BOTTOM OF CCR MATERIAL WITHIN THE LIMITS OF IMPOUNDED ASH.
4.5. THE APPROXIMATE ASH BASIN WASTE BOUNDARY PRESENTED IN THIS DRAWING WAS PROVIDED BY SYNTERRA, DATED
FEBRUARY 2018. BOUNDARY IS APPROXIMATE AND WILL BE VERIFIED DURING CLOSURE.
4.6. THE BOUNDARY OF THE RETIRED ASH BASIN LANDFILL (PERMIT # 36-12) PRESENTED IN THESE DRAWINGS WAS PROVIDED
BY DUKE ENERGY.
4.7. PROPERTY BOUNDARIES AND THE EXTENTS OF LAKE WYLIE PRESENTED IN THESE DRAWINGS ARE BASED ON THE
GASTON COUNTY GIS (GIS.GASTONGOV.COM) AND REFERENCED WITHIN THE TOPOGRAPHIC SURVEY PERFORMED BY
WSP IN FEBRUARY 2015.
4.8. THE AERIAL PHOTOGRAPH WAS OBTAINED FROM BING (C) 2023 AND DUKE ENERGY JUNE 2023.
4.9. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION WITHIN DUKE ENERGY PROPERTY
BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24, 2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY
MCKIM & CREED IN FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE ENERGY
PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION SURVEY PERFORMED BY WSP DATED MARCH
2023.
4.10. THE RAB LANDFILL IS CURRENTLY ACTIVE, HOWEVER WILL BE REMOVED AS PART OF THIS CLOSURE PLAN. SPECIFIC
SEQUENCING AND TRANSITION ACTIVITIES FROM OPERATION TO EXCAVATION OF THE LANDFILL WILL BE DETERMINED AS
PART OF FUTURE DETAILED DESIGN ACTIVITIES.
4.11. EXISTING CONDITIONS SHOWN ARE APPROXIMATE AS OF THE DATE OF THESE DRAWINGS. SOME FEATURES MAY BE
MODIFIED, REMOVED, OR ADDED AS CONSTRUCTION PROGRESSES WITHIN AND AROUND THE ASH BASINS.
DETAIL IDENTIFYING
NUMBER
SHEET NO. WHERE
DETAIL IS SHOWN
DETAIL REFERENCE ON SHEET WHERE DETAIL IS CALLED OUT
SECTION IDENTIFYING
LETTER
SECTION REFERENCE ON SHEET WHERE SECTION IS CALLED OUT
DETAIL OR SECTION TITLE
DETAIL IDENTIFYING NUMBER OR
SECTION IDENTIFYING LETTER
SHEET NO. WHERE DETAIL
OR SECTION IS CALLED OUT
DETAIL OR SECTION, NUMBER OR LETTER & TITLE
ON SHEET WHERE DETAIL OR SECTION IS SHOWN
63
625
ILL ILL
..........................
100-YR 100-YR
W.S.E.
Y
LEGEND
PROPOSED MAJOR CONTOUR
PROPOSED MINOR CONTOUR
EXISTING MAJOR CONTOUR
EXISTING MINOR CONTOUR
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
APPROXIMATE ASH BASIN WASTE BOUNDARY
LIMITS OF EXISTING RAB LANDFILL LINER
EXISTING DRAINAGE FLOW PATH
PROPOSED DRAINAGE FLOW PATH
ASH STORAGE BOUNDARY
100 YR FLOOD LINE
EXISTING OVERHEAD TRANSMISSION LINES
FENCE LINE
LIMITS OF WATER
WATER SURFACE ELEVATION
EXISTING PAVED ROADS
EXISTING UNPAVED ROADS
PROPOSED UNPAVED ROADS
RAILROAD
UTILITY POLE / TRANSMISSION POLE / TRANS. TOWER
TREELINE
EXISTING PIPES
EXISTING SLOPE DRAINS
RESIDENCES/STRUCTURES
MONITORING WELL
REMOVE EXISTING PAVED ROAD
REMOVE EXISTING UNPAVED ROAD
REMOVE EXISTING TREES/BUSHES
--------- REMOVE EXISTING PIPE
— — — — — — — — — REMOVE EXISTING SLOPE DRAIN
HATCH LEGEND
MARSHY AREA
WETLAND
REMOVE EX. RIPRAP
P"=com
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F-0342
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REMOVE EXISTING STRUCTURE
CULVERT
TRANSMISSION LINE MAX. SAG ELEVATIONS
JURISDICTIONAL STREAM
NOT FOR CONSTRUCTION
GENERAL NOTES
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
FOR ISSUED FOR APPROVAL
SCALE: AS SHOWN DES: NSF
DUKE
Lft� JOB DWG TYPE:.DWG DFTR: SVV
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® DATENO 0070 7 - 023 ENGR : J DM
FILENAME: ALN C999.001 .012 GENERAL NOTES . DWG APPD: JDM
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ANSI 22.0"x34.0" ALN C999.001 .012 2
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FILL 2 ®,
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ASH
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PERMIT NO. 3612
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r
6
1
1
I
1
1
-1
LAKE WYLIE/
CATAWBA RIVER
NORMAL W.S.E.
565.7 FT.
CATAWBA RIVER
NORMAL W.S.E.
565.7 FT.
'm
LEGEND
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
W.S.E. WATER SURFACE ELEVATION
APPROXIMATE ASH BASIN WASTE BOUNDARY
• - - JURISDICTIONAL STREAM (SEE NOTE 4)
HATCH LEGEND
WETLAND (SEE NOTE 4)
NOTES
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
3. THE AERIAL PHOTOGRAPH WAS OBTAINED FROM BINGO 2023 AND DUKE ENERGY JUNE
2023.
4. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24,
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
5. EXISTING CONDITIONS SHOWN ARE APPROXIMATE AS OF THE DATE OF THESE
DRAWINGS. SOME FEATURES MAY BE MODIFIED, REMOVED, OR ADDED AS
CONSTRUCTION PROGRESSES WITHIN AND AROUND THE ASH BASINS.
N
0 300 600
900
NOT FOR CONSTRUCTION
GRAPHIC SCALE
(IN FEET)
TITLE
EXISTING CONDITIONS PLAN WITH
AERIAL MAP - ASH BASINS
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS —
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
DUKEC/�RO�,
SCALE:
DES:
NSF
DWG TYPE:. DWG
DFTR:
SVV
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JOB N0: 60702384
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DATE: 07-27-2023
ENGR:
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FILENAME:
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LEGEND
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4�y
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ALLEN STEAM STATION
C
LAKE WYLIE/
CATAWBA RIVER
NORMAL W.S.E. 565.7 FT.
E�l
r.9
DUKE ENERGY PROPERTY BOUNDARY
W.S.E. WATER SURFACE ELEVATION
APPROXIMATE ASH BASIN WASTE BOUNDARY
- - - - JURISDICTIONAL STREAM (SEE NOTE 4)
HATCH LEGEND
WETLAND (SEE NOTE 4)
NOTES
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
z
2. REFER TO SHEET ALN C999.001.012 FOR REFERENCES.
3. THE AERIAL PHOTOGRAPH WAS OBTAINED FROM BINGO 2023 AND DUKE ENERGY JUNE
2023.
4. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
O
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24,
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
(�
5. EXISTING CONDITIONS SHOWN ARE APPROXIMATE AS OF THE DATE OF THESE
DRAWINGS. SOME FEATURES MAY BE MODIFIED, REMOVED, OR ADDED AS
CONSTRUCTION PROGRESSES WITHIN AND AROUND THE ASH BASINS.THE EXISTING
TOPOGRAPHY SHOWN IS BASED ON THE TOPOGRAPHIC SURVEY PERFORMED BY
STEWART, INC IN JUNE 2020.
0 300 600 900
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
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ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
FOR
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FOR APPROVAL
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ALN C999.001.014A wv. 2
LEGEND
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
LL LIMITS OF EXISTING RAB LANDFILL LINER
ASH STORAGE BOUNDARY
I, lit I I ll 1iljlll I I ; I ///i'.��:\t \`fiJ % 1��111� LAKE WYLIE/
I 1 `� \ • !,i . —1 III I II I I i / r ` +� I
TL 5N5 1 \% �� `� I I IIIII I IIIII II I t r r r i -\ ` ��\:S\\ 1 L Iltj II CATAWBA RIVER LIMITS OF WATER
ASH FILL 2III I I 1 JIB\' ��%� \\\�II,1
(500kV) I _-�`� r, ,. IIIII IIIIII ,III I > /i �� \ �\\\� \`��� �i I NORMAL W.S.E. 565.7 FT.
it I I
/ \ I r\__� \ \_ � 1 Jy1 \/ / lI I II IIIIII , Y ����/ L�/,)J, \ \\\\\�• - IIII II
O W Ili RETIRED ASH BASIN ,III II
TL 2A10 \ I ASH FILL 1
\ ' \� 1 �\ / ! \1 \ // IIl� r �\— ��i� �\\\ \ II III
\ � -_ r C`^ \\\ + I Jlt IIIII * � - `----- - � /�-- \\ � I,11 I
p , .,` \ .� --t I Ib (230kV) �, 1 III\ _ ___ t-- \ \\ \\ / \\ , ,I ,
\ / . , - \ t 11 _ ///r�_��\ \\1 I f 1/ I, n,l ti \I�
/�\\ \. r/ 11 �\ / �/-\//,,r.--- \ �11P1 lllllr IIIIIIII III �`—��-`\`--1__'__T+/ll
�i / <- / 1/- ' Wes` /✓\ 1 11 1,11 JI I, IIj11 , If
/ �— -ram `\__ __���
FILL I I LL-'�--� =-- - L
/ II 1,111ir IIIII„ 1 , I 1 '� - ---_ \-- ----_- %----------_' rli I I I
/ rI I Imo` - - -\------------------ I I
I I /--•-J / / ^ \ I / '- -� ` iy , / I CD SLOPE 1 IIII II ,I, II„I I I I I IImo_-_=__ __=_-_- -_ �I. = = _ _— — — — — — _ - II it I
\, . /✓ / / �/ 1/ I /►W 1 1 IIII IIIIJ IIIII„ II , I I , I r- --------- Y` \\` --- - Ih l I fill f
\�', / r,_\ J �If O I DRAIN I II — _ I, JI I I IIII r-- — —-------------------- 11 I II I IIIIIIIII
C _-----^\Jr�� \I f , / If I w , f I , /II II , I1111;� 1 I �(( ® \ ------ _ _------�__- , 111 I
I ! ti/cam + O 1 TYP. I I II Iliiilll�
J - ( ) s Y I I I I
1 ''-----��''�1 �I i r I I' I J I I I IIII yIlljl�l Illlll I 1 IIII IIII RETIRED ASH BASIN LANDFILL {II 111 I I II111111
, I+ ! \ J /- - �� , ill II I ► I�Ir(l 1I I111 ftl I II I I I I II
RETIRED ASH Plr l I Fill// , I I III IIIII I III IIII ASH LANDFILL PERMIT NO. 3612 ` IIii1� II �Illilll
III III I 111 1 III I I
ASH STORAGE fl I/ I III, fill II II 11 ! III IIIII \ III I
BASIN I I I I I I I 11 �� \,
I _ - I1 III I I I I II „I I II��II�'II IIIIIIII
I ) t, \ I I I I I I III h I I I C I I I I I L. I rtl I
rl LEI I 1 I IIII II I All IIII IIII LANDFILL SLOPE DRAINS ►LM I /I I fl II
\ \\ \ \ \ \ lit b w Irl'lI II /I 'IIIII I I ��I 111�1��11111 II C l�l I Ililllll
III O IJI IIIII �I, �I �I\fl„I IIII�.IIIII (TYP., LOCATION I \
1 \\ \ 1 1111 I I1II 111►11 fill g'�,_II 11I I111 Ill1I II I TWIN EX. Ifll,, I111,1
�'- J II III APPROXIMATE) , 1 11 1, TWIN EX. PIPES
/IIl I III ofIi111r\\ II III PIIIII `' 11 11,J1111 „I 1111:1 I, I PIPES I I'Ili I, IIII II
\ \ _ 1 I I Ir II Pill 11 \ IIII II IIIIII, I, J11,1 Ilf III , 111 ,1 j1
1 W II Illlll \ _ I I III Pill II III II I! III f IIIII IIII I
,I II I / I III II IIIII Il III II 111 I III TWIN EX. 36" RCP PIPES ----: III II j1 IIII II ` �i - �-r11 1 1 \J O III I \� ll I I II II I I 11, I I —\. __-_ I , I
\ e I \ ►Il - 1 P, I , // r+IIII I II IIII I I I1 =11, if I�nllll
__ _--�---__-__--___ _
\ \� - \� �\ \/� ��'• -� 1 ti_ �I r `O SyJ�� 1� �`\��`\ jll ll l Ilfllll �'�!/r, 11j t� 1 IL = l- = = - _ - -! IIIII f
� _ �_-----_= I I I
EX. PIPES ---- jL I 1
0__ I 11 II ll —=' Ililll
J// , If III =7�__
j/_ CONTROL PANELS ----
-\ \ _ /��' I\l �\ \ I ��:\\ . \ \ / 1._�_-_.. (TYP., LOCATIONS
ASH BASIN — - APPR XIMATE
\ 4 O� \ \ ACTIVE ) �% J
III ` \` NORTH DIKE
`\Illllf IIIII '� h
6y
C.k:-'C� � .•f . ! It1 l IIII
`� / /'%�----==�,) `a• --_1 r� .-1 �c, ,fl I III
,f� �I l7-1\ i I h II �If III
�� '-- -�> r t I o f IIII
I w r/i \ 1 1 fill I III III
it \ I I �, I1111 III I
:_'`�_���%r Z rl r !/, I 1 1 III II It
�_ � , 1 1 I r \ \� � ®€ /+1 �/ // I ► 1 V ,ff� I I II
EMERGENCY
SPILLWAY
PERMITTED SPILLWAY
NPDES
OUTFALL
SWO15
I ------- - �� , //�`\ _ III I I EX. SLUICE�J" , ®€I I I I
1 ` , O I< - I I 1 (\ III IIII / COAL YARD SUMP
PIPES BE I 1 i 1� IiiJJ, IIII DISCHARGE
I r r �=> III },I11 II ABANDONED
O/ W
PRIMARY POND 1 1 1 I 1, PRIMARY POND 2 ,' PRIMARY POND 3 1 ► 1 , IIII , III I, 1
r I 1 . 11 I I I II111
/ 1 r/ III, �_` 11 \ I I J -- ---- J/ I I I III III I
�' <yW� `, III � ` I �t'1 I I •' I 1 J _ _-� I I 1 ��IIIII 11111�
% �Jp �Y \t \)� n� I 1 i I i ` -- i i i V4,
► - t — .•. 1€ � _ __ — i / r- � 1 �` .. ... I ! 1 .\.1 /r�- I �I �- � _ - / / / )/\ r I l/' i / /7 WI \ , 1 I �t / \ J I/ rIIII III I I
O r,
`: I I EX. 24" RCP PIPE /' 1 + 1 I , \
►1 1 \ �� \\_ ?ilI c I 1 I
- % \~----"'-- - \\ W � (�1{� \ \\„\
I\/ \ J '� ,�1
1 �+ "
�+ � � � \ \ � ► �►1 / I � J /' / r I1IIIII III I,I LAKE WYLIE/
r - _ -- �\ lJ _ I _ 1 f �--- ♦ / 1 I 111 I
` 1I r � � /Ll / \_ �.-� .�•I• III I1 CATAWBA RIVER
1 / • r � - \ t \ `\ \ �,1� �~,.,. _ " /`t '1 I Ir \�_,..^ \ � - � , \\�/ ��.�' \�/I Illllf � NORMAL W.S.E.
/ / /� \ �>\ \\`_ •• \ \\\ r LJ CHEMICAL �-(^--
M BUILDING � -------'�/ `;''%' '� � ��` w � if I 565.7 FT.
\ \ o ) ,~ , ,�. _J \ Yco,II, I
\i\I ` \ \\�\ sly �,! r ,------------'__---.----- -- ,'. //j — — o O
I/1/� ' JI ' C. =fir — �- 1� : (� ^ \\ I `✓ c~n c i it
/ r 1 r\\f'�` r/ /\ \-,' w C7 III
(1C' I ! ► r / 1 ; 1 lL �' ` \ ,�- ,, ,� mac' jt � ` ' r-�J �/J t� `\ -- 1 II
��- _ - C�
\\ \`---- ,\r" o — �// ! r` '�' C—r i i _ -�
I J .,1 1 � — �, — � _ � .'�'/! `Cil' �r� ()C -•,��r r_, .,' '-- "' �r POLISHING POND IIIIII IIIII III \\l\
�w < , IIII fill IIII \ \� \
APPROX. WSE \ Ifl JI III �►
�r I IIII IIIII IIII 1 \ \
,' ril /� I 1 1 I ►/r / („ r \. -- _ (g . -�( ' S T' 01'7`�G J
617.0' I IIIII Illll 111 \ \ \�
r 1 111-y a _ _ _ s / J i -� 'r _-• /1 \ 111 III IIIIf IIIII \ \ \ \
IT-
\•) \ ' l rJ\! !
/
/I
r ^�1
411 1� J.W / ' J `\ _ _ 1)
\,
/ / J O w�_ J�
\ I >i , III I1111 IIIIJII
I
/ J ► f pIIII
, C/ s
r , ACTIVE ASH BASIN
w / - . SI"J v r\ / / J , IIIII�IIIIII III I,I
�/
� 'i /L/ l ! l�/ l + � I � � i-- � \ ► -\ 1 (,— � � r , r- % 1 IIIII IIIIII III I, I I �
✓ W I `\
Z ' (-� _ I .� c r- \ �J_ , / III IIIIII IIII I
O i� /"Jr \ ��/ 1 J r/ / I Ilnl III f1111'I
�`'`��/ ; � I •��� 1 t f= i illn�lllili IIIIII
/ / / \ h -/ ! I.� \ III IIIII III I I %
/ 1 \ ��\ 1 r / , \ r I III q I III I <
I / / / • WW ('7 `` '/ \' `\ `~) 1 \. `\_ \� Ill, ' Ali I ICI 1)
I / / 1 r �_- O r '? _ 1 . \ \ ` i' 0 1 / / ! r 1 r ` j \ t_ , , IIJ,I IIIII I I \ \\
r I O I rt r \ \ / v-I r �� \ ��'\ II ,I 111
1 + I 1I I ' j/�,� `\\ `� _-� \ - WJ/ rr - `,\
I I \ I I ,
IZIJ
IF 4III..;FF
EXISTING
WTS PADOF
Ag
/ / , t 7 ► ►+ \ . \ ` \ I / / / / / /
\ / pl
4, I \\
do
I e'I'll
If
J
/ \ / < JURISDICTIONAL--_\\ \
STREAM �`� \�� �\ \--- ' \\ \ �. !� : \ . - `, \ , IF l
l '�� ' �- �UCX- `�•i \ \\\ \,\\\\`\\\\,TI S'�ITlliljuT ����%�L S 1 ,J
-" i 71'
LAKE WYLIE
100-YEAR FLOOD
ELEVATION: 571.3 FT.
JURISDICTIONAL STREAM
LAKE WYLIE
100-YEAR FLOOD
ELEVATION: 571.3 FT.
PERMITTED SPILLWAY
NPDES
OUTFALL
002
JURISDICTIONAL STREAM
100—YR 100 YR FLOOD LINE
APPROXIMATE ASH BASIN WASTE BOUNDARY
JURISDICTIONAL STREAM (SEE NOTE 3)
HATCH LEGEND
WETLAND (SEE NOTE 3)
NOTFS
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES. r
z
3. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24, n
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
SURVEY PERFORMED BY WSP DATED MARCH 2O23. O
4. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA C)
RIVER MAY REQUIRE PERMITTING.
5. EXISTING TRUCK WASH AND SCALES TO THE NORTH OF ASH FILL 1 MAY NOT BE OC)
LOCATED WITHIN THE ASH BASIN LIMITS SHOWN ON THE DRAWINGS. THIS WILL NEED
TO BE VERIFIED PRIOR TO CONSTRUCTION.
6. EXISTING CONDITIONS SHOWN ARE APPROXIMATE AS OF THE DATE OF THESE
DRAWINGS. SOME FEATURES MAY BE MODIFIED, REMOVED, OR ADDED AS
CONSTRUCTION PROGRESSES WITHIN AND AROUND THE ASH BASINS.THE EXISTING
TOPOGRAPHY SHOWN IS BASED ON THE TOPOGRAPHIC SURVEY
PERFORMED BY STEWART, INC IN JUNE 2020.
0 300 600 900
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
EXISTING CONDITIONS PLAN (300
SCALE) - ASH BASINS
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY. NORTH CAROLINA
SEAL
N.C. ENGINEERING LICENSE NO.
F-0342
\\11111111111/!
sS'<�=
a AL q': y
c_ 043997
O4\
1\\
7-2) 3
FOR ISSUED
FOR APPROVAL
/ DUKE
ENERGY®
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:. DWG
DFTR:
SVV
JOB
[DATE. 0070 738 023
ENGR :
JDM
FILENAME: ALN_C999.001.014 EXISTING CONDITIONS PLAN WITH TOPOGRAPHIC MAP.DWG
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
ANSI 22.0"x34.0" ALN C999.001.014A
—
�6
INCHES
TENTHS i0
1

ALN C999.001.014B wv. 2
LEGEND
INCHES
__ t_..� :t \ � .cr li►h 1
\ \
Q I y \A.
\ �• �� 1 1If I
l\ /j :::::•
i171
It
BALL FIELD
S.
J)
_— mil`•%' i // Prr ` �� ~ 1� /' /r0�
( Ill il-'1`I1 ♦ _ y �—�� ,��—_ / •.. \
'�� __---'—� J ;. •.' <: j LINED RETENTION BASIN (LRB) t�\�
/\, , \ \�
r c t_,^ 1 �11 O ///,;;/ NORMAL W.S.E. 614.7 FT.
zz
J \ _ FGD WASTEWATER
Iilii1�i \` I `� \ 1 fit, _ t ' \\� TREATMENT SYSTEM
11 1 1/ r _ �' j / • it l ' 1 — \•\ i i hi'i r
/ I J III
725 rr////r// � t I 1
N\ 1 � f 5 l nyi-'\` `\ //// / / / .. � � \\\\\�\ \..\ \ \ 1l� \`\\ \, If % // t � //►Ij 11 ee 11
c �\ ! Ili i t i /////// / / \�\ \�� \ \ \ \v\ //// / 1 I
III // / %/ t'0 1 \� \\� �\\\r,b \ ; / ♦\ \\ // // / /�/ / Iv III
\ \ I t //i/1/lrt/ \� 1
t` \ 1 Il j 1! 1\ .o!///!!/ /r / l i/ ��` I it 1 1 r I \ \`\� i5 `1 I\ \\J/ „^ �� 11
\ 1 t I / �L� \ / • \
`II\I\`\
/ / : t\
��/ / \`
1 v° //
\—)\\\ \\\ \ �\\♦ \ I\ 1 )\ a `/ l\\ III o
;700
�i/
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lit I
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` \ ill
do
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it
%i— f � J ~ 1.�--`= \ �� �_ _ � � -' .� ��/ I � ( mil✓ ~ � �'. i_/.%=:5�E� �:I~%M1�`'��._1ev__ :ram, \ --__�_ ��__v��� = _/ 4 \♦ /i' �. _,.t•� _ � �_ , _ ���
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1\ j✓\ i\; i , \ \�"/—`•-ram\ _ j ����� `\`\ `� � — ' � \� r �\ \\\ \ � t
lk
� S ) / J �• / 0 / ��� U G
MATCH LINE - SEE SHEET 014A
TENTHS 10
ALLEN STEAM STATION
rNfAl " L�"k
.ti
LAKE WYLIE/
CATAWBA RIVER
NORMAL W.S.E. 565.7 FT.
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
LL LIMITS OF EXISTING RAB LANDFILL LINER
------------------ ASH STORAGE BOUNDARY
�•�••� LIMITS OF WATER
100-YR 100 YR FLOOD LINE
APPROXIMATE ASH BASIN WASTE BOUNDARY
JURISDICTIONAL STREAM (SEE NOTE 2)
HATCH LEGEND
WETLAND (SEE NOTE 2)
z
NOTES
1. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
0
2. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
0
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24,
1
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
0
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
1
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
3. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
RIVER MAY REQUIRE PERMITTING.
4. EXISTING CONDITIONS SHOWN ARE APPROXIMATE AS OF THE DATE OF THESE
DRAWINGS. SOME FEATURES MAY BE MODIFIED, REMOVED, OR ADDED AS
CONSTRUCTION PROGRESSES WITHIN AND AROUND THE ASH BASINS. THE EXISTING
TOPOGRAPHY SHOWN IS BASED ON THE TOPOGRAPHIC SURVEY
PERFORMED BY STEWART, INC IN JUNE 2020.
N
0 300 600
900
NOT FOR CONSTRUCTION
GRAPHIC SCALE
(IN FEET)
TITLE
EXISTING CONDITIONS PLAN (300
SCALE) LRB AND STATION
ALLEN STEAM STATION
CCR SURFACE
IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:. DWG
DFTR:
SVV
\�
\\�,�C/�RO,I
DUCE
JOB NO:
ENEnGY®
'
SEAL
DATE: 07- 738023
ENGR:
JDM
CL
FILENAME:
ALN_C999,001,014 EXISTING CONDITIONS
PLAN WITH TOPOGRAPHIC KING
APPD:
JDM
C_ 0431,997 :
DWG SIZE
DRAWING NO.
REVISION
G/ N Er�' O4(
ANSI D
22.0"x34.0"
ALN C 9 9 9. 0 01 .014 B
2
7�
7-2) 3
9
1
10
1

ALN C999.001.015 w-v. 2
LEGEND
11
7�
`` 1 �C/ � £c/ 1 Q'O 1—^�l�i �/\� —��`\ \ \\\ \\\ `\\ \_ '..— r\\`♦ \`\\ 00 \I \\ 1\ \`. \ \\\ \ +r +a++
0-1
-01
\\�`SO LI,` \\ \\ \I fly
645
�N
All
�._.Uv BALL FIELD
EXISTING MAJOR CONTOUR (10 FOOT)
EXISTING MINOR CONTOUR (2 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
LL LIMITS OF EXISTING RAB LANDFILL LINER
------------------ ASH STORAGE BOUNDARY
• • � • • � LIMITS OF WATER
100-YR 100 YR FLOOD LINE
APPROXIMATE ASH BASIN WASTE BOUNDARY
- - - - JURISDICTIONAL STREAM (SEE NOTE 2)
V/,/,
1\1X 'r \\� HATCH LEGEND
11
,./ / / �~ ` � ,i, � /'/ � i\I III•:•:•:•:•3:•:•:•3:•:•:•3:•:•:•3:•:•:•3:•:•:•'
d -° \ I� 1 1:•::•::•::•::•::•::•::•::•::•::•::•::� WETLAND (SEE NOTE 2)
`\ / / / / ° <d a \� ( \\1 \ •iiiiiiiiiiiiiiiii• i•
{� a \
�\ \ "' '/
/ ► \ ��� �\ _ _ -' LINED RETENTION BASIN (LRB) , I
I ' NORMAL W.S.E. 614.7 FT.
I /'r►'�p1s���� `I /1. j��\�\\\\�� r\ �n�' o \ \\\\\ �/ / 11 I /.\
Lo
' j / / / / / / / NCO r I I % �� __` �1 : — ___ \\ \�—' a 11
v', a/'� �/ \` •\ \\\�\\\\\ J— // I
MATCH LINE - SEE SHEET 016
r
z
I
I
NOTES
1. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
0
0
2. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24,
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
0
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
1
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
Cr
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
3. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
N RIVER MAY REQUIRE PERMITTING.
4. EXISTING CONDITIONS SHOWN ARE APPROXIMATE AS OF THE DATE OF THESE
DRAWINGS. SOME FEATURES MAY BE MODIFIED, REMOVED, OR ADDED AS
CONSTRUCTION PROGRESSES WITHIN AND AROUND THE ASH BASINS.THE EXISTING 0
TOPOGRAPHY SHOWN IS BASED ON THE TOPOGRAPHIC SURVEY PERFORMED BY
STEWART, INC IN JUNE 2020. N
LAKE WYLIE/
CATAWBA RIVER
NORMAL W.S.E. 565.7 FT.
'-7
0 200 400 600
�1
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
J
TITLE
EXISTING CONDITIONS PLAN (200
SCALE) - LRB AND STATION
P"=com ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR F-0342 ISSUED FOR APPROVAL
SEAL
\Q`-\\A CARS/
ti C� : oF�ss�o.•l� ,
' CL
SEAL
c- 043997
7-27 3
DUKE
60 ENElk%,7Y®
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:.DWG
DFTR:
SVV
JOB NO: 60702384
CHKD:
JDM
DATE: 07 - 27 - 2023
ENGR :
JDM
FILENAME:
ALN_C999.001.015-017
EXISTING CONDITIONS PLAN.DWG
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
ANSI 22.0"x34.0" ALN C999.001.015 2
INCHES
TENTHS 10
0
1

MATCH LINE - SEE SHEET 015
ALN C999.001.016 �2
LEGEND
-625 \ \\ \ \\ \�\\\ \ O d T Q 0-��• \ \
//// / / /// ✓, r / / '� ( may' ir, \ r� j\J ) \ \ — \
-c-
�(j ,'// \\\`r
dt
IN\ ? \ I"• F \ QE (/`X \ I >' � ALLEN STEAM STATION \ ,
Lij AJ
L�� 0 v � t \�� \ \\ � ^ i , � _ ^'-\�1 •'
Jill\\�`���
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OE— PC--
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LAKE WYLIE/
CATAWBA RIVER
NORMAL W.S.E.
565.7 FT.
— — — - 630 - — — — EXISTING MAJOR CONTOUR (10 FOOT)
EXISTING MINOR CONTOUR (2 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
LL LIMITS OF EXISTING RAB LANDFILL LINER
------------------ ASH STORAGE BOUNDARY
� • • � 0 0 LIMITS OF WATER
100—YR 100 YR FLOOD LINE
I�Ir1TCC
APPROXIMATE ASH BASIN WASTE BOUNDARY
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
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2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
z
3. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
I
C7
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMECIS JUNE 24,
LAKE WYLIE 100-YEAR
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FLOOD ELEVATION:
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
571.3 FT.
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
0
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
0
4. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
RIVER MAY REQUIRE PERMITTING.
0
5. EXISTING TRUCK WASH AND SCALES TO THE NORTH OF ASH FILL 1 MAY NOT BE
LOCATED WITHIN THE ASH BASIN LIMITS SHOWN ON THE DRAWINGS. THIS WILL NEED
TO BE VERIFIED PRIOR TO CONSTRUCTION.
6. EXISTING CONDITIONS SHOWN ARE APPROXIMATE AS OF THE DATE OF THESE
N DRAWINGS. SOME FEATURES MAY BE MODIFIED, REMOVED, OR ADDED AS
CONSTRUCTION PROGRESSES WITHIN AND AROUND THE ASH BASINS. THE EXISTING
TOPOGRAPHY SHOWN IS BASED ON THE TOPOGRAPHIC SURVEY PERFORMED BY
STEWART, INC IN JUNE 2020.
N
0 200 400 600
NPDES
I NOT FOR CONSTRUCTION
OUTFALL
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SWO15
TITLE
EXISTING CONDITIONS PLAN (200
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ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR F-0342 ISSUED FOR APPROVAL
SEAL SCALE: AS SHOWN DES: NSF
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/ 1 \ 1 1 I/ I I O ( _\s `. _-__ ` \ , `\ k/:7� c1L/ `�'1 J �' ` I �r j r I-' I 1111 11 1 I , I I 1 ` 0 \
- / 1 1 I I \\ \—� �y1___ W �`T,/ //.ja_ jigI,n'1\ C ` 1 1 111 I 1I1I, \%
TL 5N5 500kV O� '-Q __ _/ . �\
/_'-__ , i> 1.0 ^I \ ,� \ 1 ` \ \\ 1
( ) _ o __/1`_/ r ! \ \ IIIi� 1I li1 \ \\l1►�
/ I I► /J ) I \ r - (1 \ I ► i JURISDICTIONAL STREAM
/1 ♦/ ^\ - / \, / I �/ �. r 1 4 \ ` ♦ I ,,I 111 1 I, I I, \ 1
,1 \\_ ' A
'1�'N1\11`-O Li l + I )lF. 1 i /
�fi / / \ ,1, W W r /, 1 O \ ,.- 11 // \ 1 j11 1111 1 1111111 r J
/ ► ► / �' `C' ACTIVE ASH BASIN
/ •r ,// - / W
/i� TL 2A10 230kV
'\�__l -,11�
rr �1 _-/ ` r ,,� I j1, Hill
W \ I111 1 III Ill
/ I x/' / J / O O \ /' v I11111I I \
` i I � , l � , O � `. .. / � / r
\
\11,11� 1111�111 / \
TL 1A606 (100kV) (i)3'lJ� i \i / 1 �i '' _^-` cam-\ - 1 c°II1I11co 11 o
/ I / W .Jf r, Ir-J �- ,� �f ,,_ / 1111�1iilli 1111111 "' LAKE WYLIE
\ r I I I I 1 1 1 1 I
0 p I7; / ,), i PERMITTED SPILLWAY I Ill r 1 i i 111 1 i 1 I 1 i 1 100-YEAR FLOOD
W W 1, / , , rr�' , , I�1, I I I I I I,
` \ .� 'r \ I I I I I 1 1 1 1 1 1 t
\ 1 0 0 0 I I r\ !, I' v 1 \\ > j1, /IIII I I, I I1
\ ` III, 1 I 1 I 1 \ ELEVATION: 571.3 FT.
.-\ 1 .1 \ \ - l I I I I III 1, I, I 1 , I
I 1 r 111 I I I 1 1 I I `N
+ I,II �II1I1 II1I1 \ \\
'-- —` -_ W
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_ \ \ _ _
\� `\ \ \\ \ y0 \c t/1 G r `1 `\\ I % 1 \ �` _�- _-_--___': /// I l 1/ l \\r \ \� NPDES
r , \ ___-__/// 1 \ \\ OUTFACE 002
\ter/------- ------_- /i'
I\ I ��'-� `\ \\ \\ `�`L = � \ /''' Liles r` ♦\ __ _�
\�\ `\ I \ ; t `�N \\ \\ \\ \ _ O_ `\ `-`'_ '-_- \ `\_ �, 1/�1 _
\IN
Ljj
\ 1 \ \\ \ ( \ \ ,\ \\ _ \\_--' ---- �`�� ` — ` �\ \` -' /' ' EXISTING.
rN
\\ —/'� `' /�� ����\�\ \ \ WTS PAD 1 \ • •:::•::•::•::•::•• •::'o • 1 ` \
`\ 1-1.1 / -' _ —' `�` \ \ \\ \\ /' / / / 1 ;+:iii • • •••i •' •• // \ ` 1
`\ �r ; — \ \ \ ` ` ' \ ; '-\ �_ / / JURISDICTIONAL STREAM
/ I \ _ \\\\ \ 1 , 1 / / / / / / , \
\ \ -V LLI
—\ / \
NN
/ r-- O I \ j \ / \ \ /
/ d 1 \ J �\ \\ \\ \ r 1 t / / / / /' / \ / f / '' / /' /'/
If
\
\�-_- -/_- I `\ ` e 4C/ - 1 �`\`�`�`\ __\\ / ,<\� v /- �\\� \\ J I \ v rJ / t \ \I \I 1 1 I 1`
�r�will;�� / /��___ \
\ N`\ \\ J / / 1 \ \\ l r\��j �1 \ �i ' ) N l`\
/ tJ �1 / , \ f / / \ \ I \ \ u \. / CP
1 1 1 ttit
5t `` `-
i ' /' �' / / ► ` -- JURISDICTIONAL `: \ \ - " \` \ \ \ )
/ r' s', ♦' \ / I�/' STREAM •` �` \`\ \� \ \ v^------' ,^ `` -� \ t /,/ `\ \
'NNN
NN
'N,
l ' '� i ' ' i /J /---- \ `� \`\ `\`� \` `- -----' 1 _- \\ \ J J Imo, \---
�\ \ \ \ \ \ \\� -� \ / \ \ \ \ \\ \\ -`/ /n \ \\ / / \\ \\ 1 r /
\``� \\ \ \ \ `\ `\ I l ` _ / ` �`� �= `\ ` 1 I l
1"
��N Lill � 1 I
NN
INCHES 1 2 3 TENTHS 10 20 30
ALN C999.001.017 � 2
LEGEND
— — — - 630 - — — — EXISTING MAJOR CONTOUR (10 FOOT)
EXISTING MINOR CONTOUR (2 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
LL LIMITS OF EXISTING RAB LANDFILL LINER
ASH STORAGE BOUNDARY
�•�••� LIMITS OF WATER
100-YR 100 YR FLOOD LINE
APPROXIMATE ASH BASIN WASTE BOUNDARY
JURISDICTIONAL STREAM (SEE NOTE 3)
HATCH LEGEND
WETLAND (SEE NOTE 3)
KinTCC
D
z
O
1.
LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
'
O
2.
REFER TO SHEET ALN C999.001.012 FOR REFERENCES.
O
3.
THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
'
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMECIS JUNE 24,
O
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
4.
WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
N
RIVER MAY REQUIRE PERMITTING.
5.
EXISTING CONDITIONS SHOWN ARE APPROXIMATE AS OF THE DATE OF THESE
DRAWINGS. SOME FEATURES MAY BE MODIFIED, REMOVED, OR ADDED AS
CONSTRUCTION PROGRESSES WITHIN AND AROUND THE ASH BASINS.THE EXISTING
N
TOPOGRAPHY SHOWN IS BASED ON THE TOPOGRAPHIC SURVEY PERFORMED BY
STEWART, INC IN JUNE 2020.
0 200 400
600
NOT FOR CONSTRUCTION
GRAPHIC SCALE
(IN FEET)
TITLE
EXISTING CONDITIONS PLAN (200
SCALE) - ACTIVE ASH BASIN
ALLEN STEAM STATION
*4=mCOM
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
`\\\\►►I
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SCALE: AS SHOWN
DES:
NSF
DWG TYPE:. DWG
DFTR:
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CHKD:
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[DATE. 07 27 2023
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ALN_C999.001 .015-017 EXISTING CONDITIONS PLAN.DWG
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
ANSI D
���/�, ��
22.0"x34.0"
ALN C999.001.017
2
9
1
10
1

00
1
r 0 x
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lie
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# #
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ug
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iy PZ—
t ` PZ—,l
or
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—
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RB-06
PZ-06
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6P4,r4
C„ •art ?. - ♦ i Y..
j IL
jr
y r ,
Y D'
� t f
ms
'77 t
Y —J 7 t aZ-
r '
r
,
+ _ k L,;,,'�` jF'' \•i i/,S. ` � 44,
r r• t r 'yS,,(, 1 ..31Y_... _ t• tip r `�,�,�%_ - -�— +b \
jp
fir. a 1 r t�"� (a•t: '- r l� . 4r. ete:h,. g y� _
11w�`� °' �t`� 7 r ALLEN STEAM STATION
, ��E,. J` ,'. f jam'
MATCH LINE - SEE SHEET 019
INCHES 1 2 3 TENTHS 10 20 30
M l
8
ALN C999.001 .018JL
' 2
R.
r �:.: •-''
LEGEND
lie,
DUKE
DUKE ENERGY PROPERTY BOUNDARY
ASH STORAGE BOUNDARY
.;4
W.S.E.
WATER SURFACE ELEVATION
PZ23—X
AECOM WELL LOCATION (2023)
BG—X
HDR SOIL BORING/WELL LOCATION (2015)
SW—X
SM&E SOIL BORING/WELL LOCATION (2005)
{�}
RB—X/PZ—OX
SM&E SOIL BORING/WELL LOCATION (2016)
{}}
PZ—X
MORGAN CORP BORING/WELL LOCATION (2018)
ALN—LRB—X
SYNTERRA WELL/BORING LOCATION (2018)
GP—X
SYNTERRA WELL/BORING LOCATION (2019)
NOTES
1. REFER TO SHEET ALN C999.001.012 FOR REFERENCES
2. THE AERIAL PHOTOGRAPH WAS OBTAINED FROM BINGO 2023 AND DUKE ENERGY JUNE
2023.
3. EXISTING CONDITIONS OF THE VARIOUS WELLS SHOWN ARE APPROXIMATE AS OF THE
DATE OF THESE DRAWINGS. SOME MAY BE MODIFIED, REMOVED, OR ADDED AS
CONSTRUCTION PROGRESSES WITHIN AND AROUND THE ASH BASINS.
N
0 200 400 600
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
LAKE WYLIE/ SUBSURFACE EXPLORATION LOCATION
CATAWBA RIVER PLAN - LRB AND STATION
ZMAL W.S.E. 565.7 FT.
P"=com ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR F-0342 ISSUED FOR APPROVAL
SEAL DUKE
SCALE: AS SHOWN DES: NSF
``````tttittllrrjl���''
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JOB NO:60702384 CHKD: JDM
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f DATE: 07-27-2023 ENGR: JDM
043997 �� FILENAME: ALN_C999.001.018-020 SUBSURFACE EXPLORATION LOCATION PLAN. DWG APPD: JDM
GIN E� 'O`� DWG SIZE DRAWING NO. REVISION
ANSI D
7�
22.0"x34.0" ALN C 9 9 9.0 01 .018 2
7-2) 3
8 9 10
1 1 1
I

MATCH LINE - SEE SHEET 018
1
Ile
4 s • C +!�
y
� s _ w f s � .. ' a ;^ :-: ., +ram >w ' � i \ f` ,1■'� � � " ♦
I
1-7
owt
1-4
�ti r'rx try , 'i � . 4 A } S �.� � � ' -� r � ' •'�''/' � `! /'� � ,. .�; '�I.: '' r r. f., t-p„ - `'.
ALLEN STEAM STATION'
ttt
R _-
i
.w ♦ / "*
dO
- t y
�. •
PLANT ALL RD x' To_
COAL YARD '
«- 1
� LINED `x
HOLDING
z._ BASIN /
nIi11
ASH STORAGE �. I ;
I :
•1'�S a r..l �i I «-
Y RETIRED ASH «- 1 `«-
,
BASIN N I «- f 1 «- 1
4oh
rj
S
-
y
r
t r
RETIRED ASH BASIN
ti I T t
«- 1
I
,
I:
" I
e NSLF (UNDER ASH
i I
CONSTRUCTION) FILL a k,\C r,` f �'.•
� 1 r I r _ � ■ 1 i '�'y �,'�s� >t F 3c Yk e et !:r t•t`�'s*�,vtl a :—
F4
ASH I e^'t t `t, :. • r
T
FILL 1-
1-
• I — I
a 1 I y + ��
RETIRED ASH BASIN
r
`>r j ASH STORAGE
i
II
♦ Y d
RETIRED ASH BASIN LANDFILL 1
` RETIRED ASH ASH LANDFILL PERMIT NO. 3612
BASIN
AM
I I I I I • 1
-
I
• ,Y
i
ASH BASIN
ACTIVE
\� ..,. NORTH DIKE
16
tt: ow t
1 . --22 S—"20 B
1 I - 1
LAKE WYLIE/ CATAWBA
J.
�� 1 - RIVER
1 v'` NORMAL W.S.E. 565.7 FT
r -- -- B «.
i.
4h
r.
INCHES
I
Y"1
w .\ PRIMARY POND 1
PRIMARY POND 2
PRIMARY POND 3
4
ALN C999.001.019 � 2
LEGEND
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
..................
ASH STORAGE BOUNDARY
APPROXIMATE ASH BASIN WASTE BOUNDARY
W.S.E.
WATER SURFACE ELEVATION
y
�}
S—X
AECOM SOIL BORING LOCATION (2015)
`
AECOM SOIL BORING LOCATION (2015/2014)
—A-
(SEE (SEE NOTE 1)
CPT—URS—X—S
AECOM CPT SOUNDING LOCATION (2014)
AB—X/GWA—X/BG—X
HDR SOIL BORING/CAMA ASSESSMENT
TTT
WELL LOCATION (2015)
�}
SB—X
HDR SOIL BORING LOCATION (2015)
CCR—X
CCR MONITORING WELL (HDR 2016/2017)
S&ME SOIL BORING/MONITORING WELL
B—X
LOCATION (2010)
B—X/OW—X
S&ME SOIL BORING/MONITORING WELL
B
TTT
LOCATION (2007)
S&ME EXISTING ASH BASIN VOLUNTARY
AB—X
GROUNDWATER MONITORING WELL
#
LOCATION (2004)
L
CPT—X
S&ME CPT SOUNDING LOCATION (2007)
I
B—X
MACTEC SOIL BORINGS LOCATION PERFORMED
FOR HDR (2011)
AB—X
MACTEC EXISTING ASH BASIN COMPLIANCE
GROUNDWATER MONITORING WELL LOCATION
(2010)
MACTEC CPT SOUNDING LOCATION PERFORMED
S—X
FOR HDR (2011)
OW—X
DUKE EXISTING OBSERVATION WELL (1983)
C
P—X
DUKE EXISTING PIEZOMETERS WELL (1983)
AB—X,BG—X,CCR—X,CP—X
CAMA CCR MONITORING WELL (SYNTERRA 2018)
D
❑
CPT—C—X
S&ME CPT SOUNDING LOCATION (2022)
z
ABANDONED WELL
CD
O
ANWW—X
AREA OF WETNESS (AOW) SAMPLING LOCATION
(D
0
0
NOTES
�+ 1. AECOM SOIL BORING LOCATION (2015/2014) AND AECOM CONE PENETRATION TEST
LOCATION (2014) PRESENTED IN THIS DRAWING WERE PREFORMED/INSTALLED BY
URS. URS HAS SINCE BEEN ACQUIRED BY AECOM AND IS REFERRED TO AS SUCH IN
THIS DRAWING.
N 2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
3. THE AERIAL PHOTOGRAPH WAS OBTAINED FROM BINGO 2023 AND DUKE ENERGY.
4. EXISTING CONDITIONS OF THE VARIOUS WELLS SHOWN ARE APPROXIMATE AS OF N
THE DATE OF THESE DRAWINGS. SOME MAY BE MODIFIED, REMOVED, OR ADDED
AS CONSTRUCTION PROGRESSES WITHIN AND AROUND THE ASH BASINS.
0 200 400 600
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
SUBSURFACE EXPLORATION LOCATION
PLAN - RETIRED ASH BASIN
P"=com ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR F-0342 ISSUED FOR APPROVAL
SEAL SCALE: AS SHOWN DES: NSF
DUKE\� C/�RO�,' DWG TYPE:. DWG DFTR: SVV
O ��SS, `/ V ENEK%.7Y® [DATE. 07JOB NO: �027-2023 ENGR: JDM
7
Seal
�- 043997 '' FILENAME: ALN_ C999.001.018-020 SUBSURFACE EXPLORATION LOCATION PLAN.DWG APPD: JDM
G/ N ��a�' O<CDWG SIZE DRAWING NO. REVISION
ANSI D
7�
22.0°x34.0" ALN C 9 9 9. 0 01 . 019 2
7-2) 3
8 9 10

�T LEACHATE BASIN (UNDER
CONSTRUCTION)
1xino&
/ "
I r /I
1.«- •
ACTIVE ASH BASIN
I�
1
1
I
1
1
I
1
1
1
1
1 �-- 1
+ �. �- �'f
i
ol/
1 4.,
I �l!
� •1 V tis
r
1
1 w ♦�
' � � •ram �, r
do
go
60
40
dr
s
INCHES 1 2 3 TENTHS 10 20 30
ACTIVE BASIN
NORTH DIKE -
�PT--24
PRIMARY POND 3
B-3
— AB-25SL
AB-25BRU
AS-25SS
F,.
V�
•
s ' ' ;: POLISHING POND
'
U
�, -
APPROX. WSE
617.0'
♦
L,.r
xei �a j�+t
e� 1
'K:.sC_a:- ate'. A'
SSLF (UNDER
CONSTRUCTION)
w
Y_
H
Q
w
'� AAEG
.f
/ LAKE WYLIE/ CATAWBA
1 RIVER
`.1 NORMAL W.S.E. 565.7 FT.
"I
CCR-1 4S
1
1 ,
«-
i,
ALN
C999.001 .020
' •:2:
LEGEND
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
------------------
ASH STORAGE BOUNDARY
APPROXIMATE ASH BASIN WASTE BOUNDARY
W.S.E.
WATER SURFACE ELEVATION
1
�}
S—X
AECOM SOIL BORING LOCATION (2015)
URS—X—B/S—X
AECOM SOIL BORING LOCATION (2015/2014)
(SEE NOTE 1)
CPT—URS—X—S
AECOM CPT SOUNDING LOCATION (2014)
AB—X/GWA—X/BG—X
HDR SOIL BORING/CAMA ASSESSMENT
WELL LOCATION (2015)
}
SB—X
HDR SOIL BORING LOCATION (2015)
CCR—X
CCR MONITORING WELL (HDR 2016/2017)
B—X
S&ME SOIL BORING/MONITORING WELL
LOCATION (2010)
B—X/OW—X
S&ME SOIL BORING/MONITORING WELL
LOCATION (2007)
AB—X
S&ME EXISTING ASH BASIN VOLUNTARY
GROUNDWATER MONITORING WELL
LOCATION (2004)
CPT—X
S&ME CPT SOUNDING LOCATION (2007)
B—X
MACTEC SOIL BORINGS LOCATION PERFORMED
FOR HDR
(2011)
AB—X
MACTEC EXISTING ASH BASIN COMPLIANCE
GROUNDWATER MONITORING WELL LOCATION
(2010)
S—X
MACTEC CPT SOUNDING LOCATION PERFORMED
FOR HDR (2011)
,*
�}
T
OW—X
DUKE EXISTING OBSERVATION WELL (1983)
P—X
DUKE EXISTING PIEZOMETERS WELL (1983)
AB—X,BG—X,CCR—X,CP—X
CAMA CCR MONITORING WELL (SYNTERRA 2018)
D
CPT—C—X S&ME CPT SOUNDING LOCATION (2022)
z
ABANDONED WELL
I
J
NOTES
c�
1. AECOM SOIL BORING LOCATION (2015/2014) AND AECOM CONE PENETRATION TEST LOCATION
0
(2014) PRESENTED IN THIS DRAWING WERE PREFORMED/INSTALLED BY URS. URS HAS SINCE
0
BEEN ACQUIRED BY AECOM AND IS REFERRED TO AS SUCH IN THIS DRAWING.
2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
0
N
3. THE AERIAL PHOTOGRAPH WAS OBTAINED FROM BINGO 2023 AND DUKE ENERGY JUNE 2023.
0
4. EXISTING CONDITIONS OF THE VARIOUS WELLS SHOWN ARE APPROXIMATE AS OF THE DATE OF
THESE DRAWINGS. SOME MAY BE MODIFIED, REMOVED, OR ADDED AS CONSTRUCTION
PROGRESSES WITHIN AND AROUND THE ASH BASINS.
N
0
N
0 200 400 600
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
SUBSURFACE EXPLORATION LOCATION
PLAN - ACTIVE ASH BASIN
P"=com
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
DUKE0�
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:.DWG
DFTR:
SVV
CAqO���'''
JOB N0: 60702384
CHKD:
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O �ESS, `/ =
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ENERGY®
DATE: 07-27-2023
ENGR:
JDM
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= 043997 '
FILENAME: ALN_C999.001.018-020 SUBSURFACE EXPLORATION LOCATION PLAN.DWG
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
G/ N ��aO<C�
ANSI D
7�
7-2) 3
22.0"x34.0"
ALN C999.001.020
2
9 10
1 1

N
INCHES
i
,MIN Lud
PLANT ALLEN RD
Off
,- /4
/ 1 I It / 11-
r 0 Li
it
TL 1 A606 ' \
(100kV)
f ` I
TL 5N5 1 / W
(500kV) I 0Lu
0
// \\� \ \•�� J/ .-�J TL 2A10 Ow
/ ( )�
/
0
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N
625
- -600�
-N
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\I
11 I r ter\
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1 \\ \ , /\ \I\ l\ -> m ,k I / / / ll'y0 111 HOLDING
'/ \\ \\\ I \\ �/ \\►\\� v !� 1/%%, IIII BASIN
\\`vim .�—' \\\ \��\\\\ 1�� ��� � �= � ---- � _-- i��.• — }u
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TL 1A4=—
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I `
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_t
1l
I
J w�j
I
/ I
A
i
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yY l
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rf
1
it
it
\
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I
I
\ , 11I Ill 1
Ili i IliillllI LAKE WYLIE/
ii i JIIIIIII CATAWBA RIVER
Iti 1111111 ( NORMAL W.S.E. 565.7 FT.
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ALN C999.001.021 2
LEGEND
ESTIMATED BOTTOM OF ASH MAJOR CONTOUR (25 FOOT)
ESTIMATED BOTTOM OF ASH MINOR CONTOUR (5 FOOT)
EXISTING MAJOR CONTOUR OUTSIDE OF ASH BASIN (25 FOOT)
EXISTING MINOR CONTOUR OUTSIDE OF ASH BASIN (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
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• • — • • — LIMITS OF WATER
100-YR 100 YR FLOOD LINE
JURISDICTIONAL STREAM (SEE NOTE 3)
HATCH LEGEND
WETLAND (SEE NOTE 3)
KInTP:c
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
3. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC"S JUNE 24,
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
4. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
RIVER MAY REQUIRE PERMITTING.
0 300 600 900
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
ESTIMATED BOTTOM OF ASH CONTOUR
MAP
P"=com ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
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EMERGENCY SPILLWAY
LEGEND
ESTIMATED BOTTOM OF ASH MAJOR CONTOUR (10 FOOT)
ESTIMATED BOTTOM OF ASH MINOR CONTOUR (2 FOOT)
EXISTING MAJOR CONTOUR OUTSIDE OF ASH BASIN (10 FOOT)
EXISTING MINOR CONTOUR OUTSIDE OF ASH BASIN (2 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
•................• ASH STORAGE BOUNDARY
• LIMITS OF WATER
100—YR 100 YR FLOOD LINE
APPROXIMATE ASH BASIN WASTE BOUNDARY
NOTES
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
3. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24,
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
4. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
RIVER MAY REQUIRE PERMITTING.
0 200 400 soo PERMITTED SPILLWAY NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
SEAL
TITLE
ESTIMATED BOTTOM OF ASH CONTOUR
MAP - RETIRED ASH BASIN
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR ISSUED FOR APPROVAL
F-0342
-�N.CARo��'%
7
:•ri SEAL
r c- 043997
oily
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7-27 3
4[ftDUKESCALE:
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60 ENFm%m7Y®
AS SHOWN
DES: NSF
DWG TYPE:.DWG
DFTR: SVV
JOB NO: 077027-2023
DATE. 0
ENGR: JDM
FILENAME: ALN C999.001,022-023 ESTIMATED BOTTOM OF ASH CONTOUR MAP,DWG
APPD: JDM
DWG SIZE
I DRAWING NO.
I REVISION
ANSI I
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LEGEND
ESTIMATED BOTTOM OF ASH MAJOR CONTOUR (10 FOOT)
ESTIMATED BOTTOM OF ASH MINOR CONTOUR (2 FOOT)
EXISTING MAJOR CONTOUR OUTSIDE OF ASH BASIN (10 FOOT)
EXISTING MINOR CONTOUR OUTSIDE OF ASH BASIN (2 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
•----------------• ASH STORAGE BOUNDARY
----------- -'-/ — — _ — I \\ `\ \ ' "11 I I I I �� " \\/� I JURISDICTIONAL STREAM
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`\ \``\\`•Z ti / ` ELEVATION: 571.3 FT.
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• LIMITS OF WATER
100-YR 100 YR FLOOD LINE
APPROXIMATE ASH BASIN WASTE BOUNDARY
- - - - JURISDICTIONAL STREAM (SEE NOTE 3)
HATCH LEGEND
WETLAND (SEE NOTE 3)
NOTES
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
r
2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
z
3. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
I
C7
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24,
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
0
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
O
4. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
RIVER MAY REQUIRE PERMITTING. 10
0 200 400 600
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
ESTIMATED BOTTOM OF ASH CONTOUR
MAP - ACTIVE ASH BASIN
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR ISSUED FOR APPROVAL
F-0342
SEAL
\11 U 111 fill//
o
a A L _p y
c- 043997 '_ =
7-27 3
DUKE
ENEMNJ 10
SCALE: AS SHOWN
DES: NSF
DWG TYPE:.DWG
DFTR: SVV
JOB NO: 60702384
CHKD: JDM
DATE: 07-27-2023
ENGR: JDM
FILENAME: ALN C999.001,022-023 ESTIMATED BOTTOM OF ASH CONTOUR MAP,DWG
APPD: JDM
DWG SIZE
DRAWING NO.
I REVISION
ANSI I
22.0"x34.0" ALN C999.001 .023 I 2
0
N

ALN_C999.001.024
LEGEND
REV. 2
I
ll r \ko\ N \, ►n�j
I. I I i I 1
I i
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\ \ 1 \ \\
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/\` I\ f
_ O \ / ♦\ \\ \ \ 1 rl ♦ / \\
\ \
\ �\ \l / \ \
—a-650 All
BALL FIELD
� r \ r WILL BE REMOVED _ 1 / / / r / ° it \
Ir
/ e
11 le A A Iuo
Lo
fit/ ` _ I.r _ / / / d d ° ° d \\ tl I
k\ \ \i\ \\ h�\`.`� / ! - ° e _ LINED RETENTION BASIN d e
/J ICI ti M`q\\ •_--\) �r 2 / O O ° \\
NORMAL W.S.E. 614.7 FT. I I \
10
WILL BE REMOVED
f \ / 1 ♦ t I
—/\ \
r I `// /r^�\\\ i _`�`�` \= ,'t_\\\ 1 \\\ \ \, \v ; �\ 6� / / ,'� —.� e / /'/' // \`\\`�\\ ° ° d • ° a EX. CONCRETE AND RIPRAP
WILL BE REMOVED
rol
sJ`0 / // / 1 ` '
f 10
\ ♦ 1 1 f `-_--' / /,/ / /, \ \ \\\ 111 y1 1 ,1 \I 1`� `\\ ` \`� \ \ o p • \` h`\- — 11 /. ♦ `. ` \
EX. BUILDINGS
725�\�. t �,
\ \ \ WILL BE REMOVED �\ 1 0 \
�` \) i ► / s ri 11 � " �SZ i'ii /'i'i i � .'/' t -,- \ `� `\ \ \ / / / /��\ ` \`.• 1 t II I \ \
♦ l 1 1 1 1 1\ � f//!!/ // I/ / I -- '--• � Zv ~L
0 1 v//-�\ �O / �/ ' - O \ \\ `\
\ 1 \ 11 1 I /// \
EXISTING FGD WATER
\��\\ \ ` �`' f i S i i ! I ; i. i .\, / / % // / \ ., \ \ \ `'\ ` ♦\�� ��'�1 , TREATMENT SYSTEM
b\ ♦ `�\ 1 ! I l I I I 1 . `i / / / / / ! 1 // h / l � �, `♦ � `�\\� \ \ y4 �• / I I l
/ �, \\ WILL BE REMOVED \ \ � �. � / ►J , _� / I
!
�\ \ \ r 1 1 I t I I 1 I / / /// / / //// // /' 1 ! \♦\\ !) ) r c 1 ♦ \ \ J
� \ ( 1 \.0 / � � `\ III \l � \ ` \\\ \` /
I / / ♦ _h1 \� �\ \ \ \ / r
♦ �\ \ . \` \ 1 I / / 1 1
� `��\ ` ` "— "-' ` '_ \ \ ► EX. BUILDINGS
WILL BE REMOVED IIII
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► a II
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t 1 \ 1,
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\Y♦ \ 1\\V /% \(\\\ ���// q \/ I ,///I \�.1\\�, \\\Ss%n,`�. O \ sl /\I71 II 1 �/` -�/,t� G \ t\ /, 1
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/'/ / I \ \ \ \ \ \ \ \ \ 1\\ 1 1 t 11 ! I i Ml
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\ l �\ l , / r r / r /r_`` _ \ \ \ 1�`c�` �` \ \\ \\\\ \ , \ \\ \1 \ 2 \\ 1 ♦ 11 ! \ \ '` \ 11\ I I 0,
cu n \\ o
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\\\
\ �_. , �..._/,,� �, \ I -, - �. \ \ ` \ '+III III 1 ►I1 ! I I 11 \ ` � \ -, G\ �1l
�� ,�_ ` _�' ____•` , \ I !� ♦ \ � `. 1 I I I I II r, I I I I I \ \ \`\ '� ` " \ t 1 1
`/- , / "_ _-"-/o I I � \\�� \/ I I I � 11 I1 ! I I ► I I \\ !' 1 `�/ \ � 1 , r�
-�'f—''==-----�- _ -� _ 1 I I `� •�`♦ 111 I,I II / I / //1► 1 I 1 r �� \ ,'
=_` vl / t \ 1 1 I r/ I I ► 111 1 1yi ( \\ ` _^ l ! /)
- -- — ___— '—��— — _ _'____ -- l '! �`• `l// irl�l j I i 1 i r I I t ' / / ` \\\\ II
_ - / lll�Ir1 / i
/ //!/ /� / /, \l✓ �� /i----
to
21
_ �,_ Off!\ j,/ ► t ` �: _ i 1 I t 1
��_
STEAM STATION
MATCH LINE - SEE SHEET 025
INCHES 1 2 3 TENTHS 10 20 30
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
— —
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE ASH BASIN WASTE BOUNDARY
LIMITS OF EXISTING RAB LANDFILL LINER
LL
------------------
ASH STORAGE BOUNDARY
REMOVE EX. PAVED ROAD
REMOVE EX. UNPAVED ROAD
REMOVE EX. TREES/BUSHES
---------
REMOVE EX. PIPE
— — — — — — — — —
REMOVE EX. SLOPE DRAIN
REMOVE EX. STRUCTURE
JURISDICTIONAL STREAM
HATCH LEGEND
REMOVE EX. RIPRAP
a
v v �A REMOVE EX. CONCRETE
A 1 n T Ir— n
i�::16y,A_1►��:Z�>,�Il�l�y_�Y�1�IJ/e1:�'�i]�K�7►[y�ir�L1�»_Vly7ila�]�J[�7�69:11►[e'_
STRUCTURES ASSOCIATED WITH THE CANAL ROAD LANDFILL (CLF) CONSTRUCTION. A
DETAILED DEMOLITION PLAN WILL BE DEVELOPED PRIOR TO CONSTRUCTION.
2.
THE EXISTING SPILLWAYS WILL BE APPROPRIATELY DECOMMISSIONED.
3.
LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
4.
REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
5.
EXISTING VEGETATION WITHIN THE CLOSURE LIMITS MUST BE GRUBBED AND REMOVED.
6.
PERMITTING AND SCHEDULE IMPACTS ARE POSSIBLE FOR POTENTIALLY
ENVIRONMENTALLY SENSITIVE AREAS (E.G. WETLANDS, ENDANGERED SPECIES). THESE
IMPACTS WILL BE VETTED PRIOR TO CONSTRUCTION.
7.
EXISTING SLUICE LINES, CULVERTS AND OTHER PIPES TO BE FULLY REMOVED, UNLESS
OTHERWISE INDICATED ON THE PLANS.
8.
EXISTING ROADS WITHIN CLOSURE AREA TO BE REMOVED.
9.
FREE WATER REMOVAL TO BE PERFORMED AS PART OF CLOSURE PROCESS.
10.
ABANDON WELLS AS NEEDED.
N
11.
THE HIGH VOLTAGE OVERHEAD TRANSMISSION LINES ARE INTENDED TO REMAIN IN
PLACE AND IN SERVICE DURING CLOSURE ACTIVITIES.
12.
THE LINED RETENTION BASIN (LRB)CURRENTLY SERVES AS A PRIMARY TREATMENT OF
VARIOUS PLANT PROCESS FLOWS AND IS THE PROPOSED TREATMENT FOR FUTURE
LANDFILL LEACHATE FLOWS. PRIOR TO THE DEMOLITION OF THE LRB, ALL FLOWS
CURRENTLY ROUTED TO OR PROPOSED TO BE ROUTED TO THE LRB WILL BE RE-ROUTED
TO AN APPROPRIATE WASTE WATER TREATMENT SYSTEM.
0 200
400 600
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
LAKE WYLIE/
TITLE
CATAWBA RIVER
NORMAL W.S.E. 565.7 FT.
DEMOLITION PLAN - LRB AND
STATION
A"=com
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
DUKECARO//'
SCALE: AS SHOWN
DES: NSF
DWG TYPE:. DWG
DFTR: SVV
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FILENAME: ALN_C999.001.024-026 DEMOLITION PLAN.DWG
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ALN_C999.001.025
LEGEND
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
APPROXIMATE ASH BASIN WASTE BOUNDARY
LIMITS OF EXISTING RAB LANDFILL LINER
LL
..................
ASH STORAGE BOUNDARY
REMOVE EX. PAVED ROAD
- - -
-
REMOVE EX. UNPAVED ROAD
REMOVE EX. TREES/BUSHES
REMOVE EX. PIPE
- - - - - - - -
- REMOVE EX. SLOPE DRAIN
REMOVE EX. STRUCTURE
HATCH LEGEND
REMOVE EX. RIPRAP
A I /-1 T r (-%
1. THIS PLAN PROVIDES A SUMMARY OF CONCEPTUAL PLANS FOR DEMOLISHING
STRUCTURES ASSOCIATED WITH THE ASH BASIN AS PART OF CLOSURE. A DETAILED
DEMOLITION PLAN WILL BE DEVELOPED PRIOR TO CONSTRUCTION.
2.
THE EXISTING SPILLWAYS WILL BE APPROPRIATELY DECOMMISSIONED.
3.
LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
4.
REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
5.
EXISTING VEGETATION WITHIN THE CLOSURE LIMITS MUST BE GRUBBED AND REMOVED.
6.
THE RETIRED ASH BASIN LANDFILL IS CURRENTLY ACTIVE, HOWEVER WILL BE REMOVED
AS PART OF THIS CLOSURE PLAN. FEATURES ASSOCIATED WITH THE LANDFILL WILL BE
REMOVED OR ABANDONED.
7.
PERMITTING AND SCHEDULE IMPACTS ARE POSSIBLE FOR POTENTIALLY
ENVIRONMENTALLY SENSITIVE AREAS (E.G. WETLANDS, ENDANGERED SPECIES). THESE
IMPACTS WILL BE VETTED PRIOR TO CONSTRUCTION.
8.
EXISTING SLUICE LINES, CULVERTS AND OTHER PIPES TO BE FULLY REMOVED, UNLESS
OTHERWISE INDICATED ON THE PLANS.
9.
EXISTING ROADS WITHIN CLOSURE AREA TO BE REMOVED.
10.
FREE WATER REMOVAL TO BE PERFORMED AS PART OF CLOSURE PROCESS.
11.
ABANDON WELLS AS NEEDED.
N 12.
THE HIGH VOLTAGE OVERHEAD TRANSMISSION LINES ARE INTENDED TO REMAIN IN
PLACE AND IN SERVICE DURING CLOSURE ACTIVITIES.
13.
EXISTING TRUCK WASH AND SCALES TO THE NORTH OF ASH FILL 1 MAY NOT BE LOCATED
WITHIN THE ASH BASIN LIMITS SHOWN ON THE DRAWINGS. THIS WILL NEED TO BE
VERIFIED PRIOR TO CONSTRUCTION.
14.
EXISTING SPILLWAY LOCATED IN SOUTHEAST CORNER OF RAB TO BE ABANDONED
IN -PLACE BY GROUTING AFTER NEW OUTLET CONSTRUCTED.
0 200
400 600
NOT FOR CONSTRUCTION
GRAPHIC SCALE
(IN FEET)
TITLE
DEMOLITION PLAN - RETIRED ASH
BASIN
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
DUKECA
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:. DWG
DFTR:
SVV
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JOB NO: 07�027-2023
ENEK%17Y®
DATE. 0
ENGR:
JDM
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FILENAME: ALN_C999.001.024-026 DEMOLITION PLAN.DWG
APPD:
JDM
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G/ N ��cO<C�
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ALN C999.001 .026
REV. 2
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TO BE DEMOLISHED
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Q ,O ► I I `-----' --- '_� — — n / (SEE NOTE 14) r\
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I . //�----- I STRUCTURE TO BE I I I I I I 1
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V I r
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1 ``�� R 1 ► 1 y r - - = PIPES TYP. 1 ► 1 III I III I DISCHARGE
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PLACE)
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f\ J�� PRIMARY —
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CATAWBA RIVER
',/' NORMAL W.S.E.
\ (� IJ r
X '' 4-ram. ! ^S'i� \ 1 \\ III r t \- 'r i �� �� � I� '� r/� .'�/ Ii I 1 1 565.7 FT.
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I I l t 1 REMOVED) I I r � � i i ' `t \I , \\
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, r 1 I I I III I I I I I I I I I x
` \ ABANDON SPILLWAY I 11 IIIII 1 I I III I
w i,� �/ v �`� \� (SEE NOTE 12) \/ I I i iI i i i 11 I I I I 111 I �-
/ O W W `� `�C (� `� \ I 1 I III III I
OQ /
\ RISER AND � / I I III I IIIIII I
w w / \\ INSTRUMENTS TO ,1 1 I 1 11I 111 i I 1 I I 1 I I 1
(I [� / \ ` \IIII III 1 I III I I I
O O Q r" I J REMOVE TREES \� BE DEMOLISHED ` t I i if I11 I I i i I I I M
TYP.
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\ W I �`_ \` \�- I I 11111 fill 4\
QQ / / `�`-`-� `� - r 11 / 11IT�!
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=C�-_J�= ' ` 717
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INCHES
I TENTHS
LL
AIr1TCC`
LEGEND
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
APPROXIMATE ASH BASIN WASTE BOUNDARY
LIMITS OF EXISTING RAB LANDFILL LINER
ASH STORAGE BOUNDARY
REMOVE EX. PAVED ROAD
REMOVE EX. UNPAVED ROAD
REMOVE EX. TREES/BUSHES
REMOVE EX. PIPE
REMOVE EX. SLOPE DRAIN
REMOVE EX. STRUCTURE
JURISDICTIONAL STREAM
HATCH LEGEND
REMOVE EX. RIPRAP
1. THIS PLAN PROVIDES A SUMMARY OF CONCEPTUAL PLANS FOR DEMOLISHING STRUCTURES
ASSOCIATED WITH THE ASH BASIN AS PART OF CLOSURE. A DETAILED DEMOLITION PLAN WILL BE
DEVELOPED PRIOR TO CONSTRUCTION.
2. THE EXISTING SPILLWAYS WILL BE APPROPRIATELY DECOMMISSIONED.
3. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
4. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
5. EXISTING VEGETATION WITHIN THE CLOSURE LIMITS MUST BE GRUBBED AND REMOVED.
6. THE RETIRED ASH BASIN LANDFILL IS CURRENTLY ACTIVE, HOWEVER WILL BE REMOVED AS PART
OF THIS CLOSURE PLAN. FEATURES ASSOCIATED WITH THE LANDFILL WILL BE REMOVED OR
ABANDONED.
7. PERMITTING AND SCHEDULE IMPACTS ARE POSSIBLE FOR POTENTIALLY ENVIRONMENTALLY
SENSITIVE AREAS (E.G. WETLANDS, ENDANGERED SPECIES). THESE IMPACTS WILL BE VETTED
PRIOR TO CONSTRUCTION.
8. EXISTING SLUICE LINES, CULVERTS AND OTHER PIPES TO BE FULLY REMOVED, UNLESS OTHERWISE
INDICATED ON THE PLANS.
9. EXISTING ROADS WITHIN CLOSURE AREA TO BE REMOVED.
10. FREE WATER REMOVAL TO BE PERFORMED AS PART OF CLOSURE PROCESS.
11. ABANDON WELLS AS NEEDED.
N 12. EXISTING SPILLWAY LOCATED IN SOUTHEAST CORNER OF AAB TO BE ABANDONED IN -PLACE BY
GROUTING AFTER NEW OUTLET CONSTRUCTED.
13. THE HIGH VOLTAGE OVERHEAD TRANSMISSION LINES ARE INTENDED TO REMAIN IN PLACE AND IN
SERVICE DURING CLOSURE ACTIVITIES.
14. EXISTING SPILLWAY LOCATED IN SOUTHEAST CORNER OF RAB TO BE ABANDONED IN -PLACE BY
GROUTING AFTER NEW OUTLET CONSTRUCTED.
0 200 400 600
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
DEMOLITION PLAN - ACTIVE ASH
BASIN
)%=mcom
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:. DWG
DFTR:
SVV
A/,
CAR i,//
DUKE�
N0: 60702384
CHKD:
JDM
FNERGYO 'DATE.
o�ESS/O
_ :� SEgL �'. y
07-27-2023
ENGR:
JDM
=�- 0439g7'` =
FILENAME:
ALN_C999.001.024-026 DEMOLITION PLAN.DWG
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
N Era' O<C
ANSI D
�r�ir f 0��\\`��
22.0"x34.0"
ALN C999.001 .026
2
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LLj
nr c b'J1)\. r
-PLANT ALLEN RD _�___.'.'
r f ,
x _ _ _ -_ ''OE ALLEN STEAM STATION
COAL YARD
w i ---- r 1 \� \.\ 1 a/ LINED I
® / \ / / r I TL 1A606 (100kV) \\ \\\\, �L , \� r' ./ I 1 HOLDING
° i l �% / 1 ' r TOWER 4 �� \ '\ \\ t'lIi w "/_ ^"' Ir`/ BASIN /
�\ \ IIl .... -� lr / I I II
<:)--625-, (SEE NOTE 8)
AJ600
♦ 1 III ► ► `—' � I � ` \ \� 11 � ! t� \t �� �.'� � � I ....IJJ
TL 5N5 (500kV)
1 /
1 x// r TOWER 67 ll \��. =Z- - �� q� AREA TO BE
J I � Irk' J I I I -\ =r� � - - - \ `7 I I SEE NOTE 8 RETIRED ASH BASIN DIKE =- _______- \\
_— — ���\`l\
\\�\\ BACKFILLED AFTER
1 REMOVAL OF CCR
1 ( II I I TL 2A10 (230kV) I (GASTO-016) /
CONCEPTUAL NSLF FOOTPRINT TOWER 4
(SEE NOTE 1.2 IN GENERAL I SEE NOTE 8 I'1
o -- �' i I \I/ NOTES, DRAWING NO I \\ ,; I1i 11 CONCEPTUAL DAM BREACH
r // I AREA SEE NOTE 1.3 IN
1 Il \ ALN_C999.001.012) I I 1
iiillll GENERAL NOTES, DRAWING NO.
iiiilil 1 ALN_C999.001.012)
O w i i �� TL 1A482 (100kV) Illi x .1
O \� TOWER 3 1
r1 (SEE NOTE 8) / I
` - / /�- W TL 1A606 (100kV)I� LAKE WYLIE/
O Cyr 4 TOWER 5 I I I CATAWBA RIVER
I— -- —� \ r—^ p
---.moo _______ I O q (SEE NOTE 8) ,� NORMAL W.S.E. 565.7 FT.
C l------/, r O I l
I I I 1
LAKE WYLIE
I G O
x) II 100-YEAR FLOOD
\ \\\\\\ \ \♦-\` O I 'I IIIII II i ELEVATION: 571.3 FT.
W
TL 1A482 (100kV)
W \
TOWER X
/tinter/
TL 1A606 (100kV)
TOWER 6
l t� I' �/, \ '` \\\ co `\_ (SEE NOTE 8) cal �� ` iiI TL 1A482 (100kV)
VLIEACHATE
BASIN Ow x I 11
\ `W J
II iilll
III I
AREA TO BE BACKFILLED �i IIIII
AFTER REMOVAL OF CCR Illl
\ II � 11 IIIII
EMERGENCY SPILLWAY
(TO BE ABANDONED)
- PERMITTED SPILLWAY
(TO BE ABANDONED)
- NPDES
OUTFALL
SWO15
COAL YARD SUMP
DISCHARGE
(ABANDONED)
��✓ I� jllll/ I l
l i IiI i� I' CONCEPTUAL DAM BREACH AREA
lli ililil II (SEE NOTE 1.3 IN GENERAL NOTES,
IIIII IIIIIII DRAWING NO. ALN_C999.001.012)
IIIII IIIIIII '
°
�/
CHEMICAL r j I IIII III IIII
\- I 1 ' ' I IIIII IIIIII III
1 a I IIII IIII ��
BUILDING ,j II
-1p 1 � 1 IIIII IIIIIII II 1
I. I III IIII y 1
Y/ LAKE WYLIE/
CONCEPTUAL ABLF FOOTPRINT Illlliill CATAWBA RIVER
(100kV)' \t \ \ , (SEE NOTE 1.2 IN GENERAL dill IIIiIIi! NORMAL W.S.E.
I I �— — \ ` •• \ ` \ I III IIII CP
�) i i i / �•' \ \\ \\ 'i r \ \ \ `) - NOTES, DRAWING NO IIiI IIIIII
565.7 FT.
/ / / �� ` `\ 1 u\ ow- x`I ALN_C999.001.012) 1111 IIII I
II I I I 1 / � \\ — TL 5N5 —,t fl\� O �- I 7 IIII 1j111I�
II \ \ \ (500kV) / I ' \ r' iili Iillil
Lu 1
TL 2A10 '''- i 06
(230kV)
_ w Q \ `\
( I IIII1II
AREA TO BE BACKFILLED
f AFTER REMOVAL OF CCR
;f h W IIIIIIIIIII/1
�/r/ �ry ?/;f / OW
f 111 1111I11�
!�( I II IIIII)
al
LAKE WYLIE 100—YEAR FLOOD
ELEVATION: 571.3 FT.
JURISDICTIONAL STREAM
CONCEPTUAL DAM BREACH
575 I IIII 1 AREA (SEE NOTE 1.3 IN
AREA TO BE BACKFILLED II Illlllil GENERAL NOTES, DRAWING NO.
--\ EXISTING AFTER REMOVAL OF CCR -SO
O IIIII yY I ALN_C999.001.012)
/ O I� I III
WTS PAD
625.
vI ll \
�w! _=`Zz
I ► \ `\ `/ �. I / 1 1 ; \\ .�`I-mot- � ; ,'� `\ \\\\� \ , � , J -.__ .\ \ 1 � I � / 1
PROP. CONCRETE \\.6'�, \ /
O rI \i ,� i APRON \`\ �����'\� IJ CONCEPTUAL SSLF FOOTPRINT
- / 6 _ \ r , \\`\`\ (SEE NOTE 1.2 IN GENERAL
"— �J---
\ \\\ / NOTES, DRAWING NO
O 4/ ALN_C999.001.012)
4kr` _ 7 1
� , ��' _—� `\\ -' 1 0 �� •�� � ` �\\ `\ \_..� % 1 r� \ ^'I 1 Ill \
jdpp
Qj
/
r� . A l r/ / _ \ r� /'\_ 1 1 1 \_---> I ,1 �\ \ `\
_ _- �\ \ `\\ - �___/ JURISDICTIONAL STREAM
TENTHS 10 20 30 4 6 6
NPDES OUTFALL 002
PERMITTED SPILLWAY
(TO BE ABANDONED)
JURISDICTIONAL STREAM
ALN C999.001.027
LEGEND
625 PROPOSED MAJOR CONTOUR (25 FOOT)
PROPOSED MINOR CONTOUR (5 FOOT)
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
LL LIMITS OF EXISTING RAB LANDFILL LINER
APPROXIMATE ASH BASIN WASTE BOUNDARY
• LIMITS OF WATER
100-YR 100 YR FLOOD LINE
■ - � JURISDICTIONAL STREAM (SEE NOTE 3)
HATCH LEGEND
WETLAND (SEE NOTE 3)
NOTES
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
3. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24,
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
4. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
RIVER MAY REQUIRE PERMITTING.
5. THE INTENT IN BREACHING THE RAB AND AAB DIKES IS TO REMOVE THE DIKES FROM
REGULATION AS DAMS. THIS WILL BE ACCOMPLISHED BY PERFORMING A FULL LOCAL
BREACH, I.E. TO REMOVE A PORTION OF THE DIKE COMPLETELY DOWN TO NATIVE
GROUND AT ITS LOWEST POINT SUCH THAT THE DIKE WILL NOT IMPOUND WATER OR
CCR MATERIAL. A SEPARATE NEW BERM WILL BE BUILT AROUND THE FUTURE
STORMWATER MANAGEMENT AREA FOR LONG-TERM STORMWATER MANAGEMENT.
6. STORMWATER CHANNEL GRADING IS NOT SHOWN ON THIS PLAN. CHANNEL LAYOUTS
HAVE BEEN CONSIDERED AT A CONCEPT LEVEL TO VERIFY ITS FEASIBILITY AND WILL BE
SHOWN AS PART OF FUTURE DETAILED DESIGN. SEE SHEET 030 FOR ADDITIONAL
DETAIL ON THE PROPOSED STORMWATER MANAGEMENT FEATURES..
7. ASH SURROUNDING TRANSMISSION TOWERS TO REMAIN AND WILL BE CAPPED AS
SHOWN ON SHEETS 034 (TYPICAL PLAN AND PROFILE) AND 040 (DETAILS).
0 300 600
900
NOT FOR CONSTRUCTION
GRAPHIC SCALE
(IN FEET)
TITLE
FINAL CLOSURE GRADING PLAN -
ASH BASINS
)%=Mcom
ALLEN STEAM STATION
CCR SURFACE
IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
\,Ililll�I/.
^
r UKE
SCALE: AS SHOWN
DES:
NSF
SVV
`� A CA�Orr/'''
DWG TYPE:. DWG
DFTR:
JOB
- - - ../
�ESS, .
ENElk%175 Y®
DATENO 0070�38023
ENGR:
JDM
CL SEa� _p y
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= : :
= 04997-: =
FILENAME:
ALN_C999.001.027 FINAL GRADING PLAN.DWG
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
ANSI D
22.0"x34.0"
ALN C999.001 .027
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® I ,tJ i L \I \) \ , 1 / w I / I "t`' / '+\ \ 11\ \� ` \\\ 1 r 1 ♦ 1 I \I /
1 I O / I�� 1 , \ \\ \ \ \ L J ) rl 1 1 J I LINED HOLDING
T t\ \ _ , / / I\ \ i `\\ \\ <\ \\ et l �> n,/t1 (\ / t
TL 1A606 (100kV) \ ) \c • d \� \\ \ \ ( / / / r /
/ BASIN /
co')w I TOWER 4 \ `\� +{ \\\ \ �\ \\ L: w c ot,/ e' 1 I
i t�\ 1 / (SEE NOTE 7) \\ it
�^� \I 0 I 6+\\_ ,✓-J {1 i I II \\ \ I
it
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-41
O
\ `- t---=-----\ II
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TOWER 67 O 0\ \\ ---------------------
(SEE � — NOTE 7) -= =_ =---_- - __
_
-------------
Lu
7 ) ► i i i I - 1 CONCEPTUAL NSLF FOOTPRINT ' &0
I W I I I I\\\ \\\ I
1 (SEE NOTE 1.2 IN GENERAL ( I O I O TL 2A10 (230kV)
NOTES, DRAWING NO 11 45 I TOWER4 1 1 / \ \ 11j�1��1\ 1
/ ALN_C999.001.012) I `\ I (SEE NOTE 7) I I 1 / I AREA TO BE BACKFILLED 111 I i i i x0 1 CONCEPTUAL DAM
TL 1A482 100kV I
i� \ � AFTER REMOVAL OF CCR 1 i i 1 III O BREACH GRADING
TOWER3( )l(SEE NOTE 1.3 IN
= 1 1 \
GEN-
ERAL NOTES,(SEE NOTE 11 w DRAWING NO. p
ALN C999.001.012)
,1,
J I
TL 1A606 (100kV)
w If TOWER 5 1
_ 1 ,--------\-- O I(SEE NOTE 7) i I
LAKE WYLIE/
-- CATAWBA RIVER
NORMAL W.S.E. 565.7 FT.
IliiI
r)
,iI I! iI II II iI IIIII ixII
, 100-YEAR FLOOD
ELEVATION: 571.3 FT.O
JJ i O w r r I I i I 600 I iiiliii I
I I I � I I I�III11 � 1
\%`� I I II I i y�h �I iiiliil ,o
w I I 1 i I II I iiilii I
\ \\ I O I 1 �I I�IIII
I w Ow O I I 1 1 575 II l1 ilii 1
I I I
1 yp_ it'll O I 1 EMERGENCY SPILLWAY
I I
I (TO BE ABANDONED)
{{�
O 0-- 1 II I 11 11
�' \ II PERMITTED SPILLWAY
/-----`--\ I TL 1A482 (100kV) _ _ _ _ AREA TO BE BACKFILLED
- - - _ _ 1 [i;J •' (TO BE ABANDONED)
-- AFTER REMOVAL OF CCR
INCHES
i {° •�,.4ft_ TOWER X
J/'
\\ 1 1 _-
TL 1A606 (100kV) ) 1 I \\,____ --I
-- TOWER 6Ard
(SEE NOTE 7)
� \ I r 1
O LLJLL I / II i i TL 1A482 (100kV)
/
_! \• w w J LL0(
: '/ / SEE
rLij
O ww00
I I I I I
-'' Lid- - I II
i 0
LLJ I I
O wLLi I I/
X o�I 1 w \_ w 1 rJ
�T\ I I
TENTHS 110 1 1
8F
AAB�DIKE
CONCEPTUAL ABLF FOOTPRINT
(SEE NOTE 1.2 IN GENERAL
NOTES, DRAWING NO
ALN_C999.001.012)
/NPDES OUTFALL
i'' I SWO 15
IIIIII IIIIII .\j /
�iI`Ii ililil I / /4
III ► I I i I i r 1 ( COAL YARD SUMP
r1i (r1 i l i I i f ^I� Ihi I DISCHARGE
;l l i i i i I i (ABANDONED)
IIIII (IIII II
III I III j1� �\ I
11
Iiilil iil II iir>�
IIII I I 11 1�
r S LAKE WYLIE/
CATAWBA RIVER
UU 8 I , I I II II NORMAL W.S.E.
O i I I Ili \ 565.7 FT.
1 1 1 i i i l 111-i : II 100-YEAR FLOOD
I I I
l i i l l i ELEVATION: 571.3 FT.
111 iiiliil 11
!I CONCEPTUAL DAM BREACH
11 I I I I GRADING (SEE NOTE 1.3 IN
li i IIII i i GENERAL NOTES, DRAWING
Ii l I I I i I I 11 NO. ALN_C999.001.012)
ALN C999.001.028
LEGEND
625
PROPOSED MAJOR CONTOUR (25 FOOT)
PROPOSED MINOR CONTOUR (5 FOOT)
- - - - 625 - - -
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
LIMITS OF EXISTING RAB LANDFILL LINER
LL
APPROXIMATE ASH BASIN WASTE BOUNDARY
•
LIMITS OF WATER
100-YR
100 YR FLOOD LINE
A I r _r r7 0
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
3. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24,
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
4. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
RIVER MAY REQUIRE PERMITTING.
5. STORMWATER CHANNEL GRADING IS NOT SHOWN ON THIS PLAN. CHANNEL LAYOUTS
HAVE BEEN CONSIDERED AT A CONCEPT LEVEL TO VERIFY ITS FEASIBILITY AND WILL BE
SHOWN AS PART OF FUTURE DETAILED DESIGN. SEE SHEET 030 FOR ADDITIONAL
DETAIL ON THE PROPOSED STORMWATER MANAGEMENT FEATURES.
6. ASH SURROUNDING TRANSMISSION TOWERS TO REMAIN AND WILL BE CAPPED AS
SHOWN ON SHEETS 031 (TYPICAL PLAN AND PROFILE) AND 037 (DETAILS).
0 200 400 600
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
FINAL CLOSURE GRADING PLAN -
RETIRED ASH BASIN
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR F-0342 ISSUED FOR APPROVAL
SEAL D UKE SCALE: AS SHOWN DES: NSF
�,�N DWG TYPE: ,DWG DFTR: SVV
......
oFESs/� '`''� ENERGY® JOB 0: 60702384 CHKD: JDM
: •a SEAL �•• y ' [DATE"'
: 07-27-2023 ENGR: JDM
�c- • 043997'-: = FILENAME: ALN_C999.001.028-029 FINAL GRADING PLAN.DWG APPD: JDM
G/NIO�C�� DWG SIZE DRAWING NO. REVISION
'`7-2) 3 0� N�`�, ANSI D
22.0"x34.0" ALN C999.001 .028 2
9 10
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\� •\ �� �— -� \ I I II i I I iiilii p' 1
^y` II I ,IIII O
EMERGENCY SPILLWAY
I. (TO BE ABANDONED)
swap-?" I 1 O I II III II I1
lj
1 PERMITTED SPILLWAY
11 �_— AREA TO BE BACKFILLED - __ _ �' /'/i ,'
TL 1A482 (100kV) - _ - AFTER REMOVAL OF CCR (TO BE ABANDONED)
_n,.� I, TOWER X
NPDES OUTFALL
S W 015
_625 -►� I (� s J / I /
DIKE
-� /� AAB NORTH � i i `I ± i i i I I • � / r 4
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TOWER 6 \\ f r _--- ) J 1/�d '
\ \ -\ /QD//,/� r1(r IIII ^t� I I DISCHARGE
(SEE NOTE 7) 1 \ �\ \ i 1 r l,� �; I IIII i I r
� 1 --\__- ,/ I l r •,„ I I (ABANDONED)
�� I \ III II jI
O Owl I / I11 TL 1A482 (100kV) III11' '
( I i r' ► 625IL
1 1 I I
w' Ly 11 I \ / \ r 1
-
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\\------ �/— /I/jO A ® LAKE WYLIE/
i / w /'' w / r O �� ' I� 1 CATAWBA RIVER
I\ / fO 0/ O/ x / / s-- --- - C)
rIf 1 I I lie II NORMAL W.S.E.
565.7 FT.
1 ,/ O ww I t I I I I I I I III 11 100-YEAR FLOOD
/. / • / /\v _ 00 I I l I• I I, 1 1 1 , I I I i /, I
' L�- xCl , I I i I I I,11 1 IIi 11 i ELEVATION: 571.3 FT.
O II I 11 III I III I 1
X 111 I I I III II
�I IIII I I I
iIIII IIII I ICONCEPTUAL DAM BREACH
wowIII It GRADING (SEE NOTE 1.3 IN
(l
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X r'1 w w I rl I I I IIIII I I I I I I 1 NO. ALN_C999.001.012)
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\ I IIIII I
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l t \ \ \ I 7 — ) 11 I
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AFTER REMOVAL OF CCR I I I I i i 111 \ X I 100-YEAR FLOOD
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7
,/ /'' ,'// / ELEVATION: 571.3 FT.
ill
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5 IIIIII
Lu
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IIIII I CONCEPTUAL DAM BREACH AREA
I (SEE NOTE 1.3 IN GENERAL NOTES,
DRAWING NO. ALN_C999.001.012)
O I
/ I II I i
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>,.00 O
�` 5I.IIIII III III I LAKE WYLIE/
O CATAWBA00
j l I I I I I I I I I % RIVER
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AFTER REMOVAL OF CCR i 11 l I i i I M IQI W S FT565.7
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00
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\
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1,\\\ FOOTPRINT/GRADING (SEE NOTE
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\ \ / \ v / \ \ \ \ I NO ALN_C999.001.012 / /
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0 INCHES 1 2 3 TENTHS 10 20 30 1 5 1 1 1
ALN C999.001 .029
LEGEND
625 PROPOSED MAJOR CONTOUR (25 FOOT)
PROPOSED MINOR CONTOUR (5 FOOT)
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
LL LIMITS OF EXISTING RAB LANDFILL LINER
APPROXIMATE ASH BASIN WASTE BOUNDARY
LIMITS OF WATER
100—YR 100 YR FLOOD LINE
- - - - JURISDICTIONAL STREAM (SEE NOTE 3)
HATCH LEGEND
WETLAND (SEE NOTE 3)
AIr1TrC%
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
3. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24,
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
r
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
z
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
4. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
RIVER MAY REQUIRE PERMITTING.
5. STORMWATER CHANNEL GRADING IS NOT SHOWN ON THIS PLAN. CHANNEL LAYOUTS
O
HAVE BEEN CONSIDERED AT A CONCEPT LEVEL TO VERIFY ITS FEASIBILITY AND WILL BE
O
SHOWN AS PART OF FUTURE DETAILED DESIGN. SEE SHEET 030 FOR ADDITIONAL
DETAIL ON THE PROPOSED STORMWATER MANAGEMENT FEATURES.
6. ASH SURROUNDING TRANSMISSION TOWERS TO REMAIN AND WILL BE CAPPED AS
N
SHOWN ON SHEETS 034 (TYPICAL PLAN AND PROFILE) AND 040 (DETAILS).
(�
0 200 400 600
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
FINAL CLOSURE GRADING PLAN -
ACTIVE ASH BASIN
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR F-0342 ISSUED FOR APPROVAL
;EAL SCALE: AS SHOWN DES: NSF
DUKE DWG TYPE:. DWG DFTR: SVV
_`` O ' ENElkk.7Y® JOB N0: 60702384 CHKD: JDM
�: S�qL Q'. y [DATE. 07-27-2023 ENGR: JDM
CL
�- 043997'" = FILENAME: ALN_ C999.001.028-029 FINAL GRADING PLAN.DWG APPD: JDM
N ��aO<C,\� DWG SIZE DRAWING NO. REVISION
���\\`\� ANSI D
22.0"x34.0" ALN C999.001 .029 2
7-2) 3
9 10

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\ \ \ I I` f ( J� r \ \\t.►. \\ \\\ 11 I t \
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I -,Q .T I / �t)— 625 - ,; / \ \ \\ , • 1s111 \ ` , . 1 J , i ► \� 11
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/ 1 r /�-- / - I r \ \
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uu
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J I ---- \\\ \\` `\ \\ \ \ / \ \ RETIRED ASH BASIN DIKE _ _ - — _— \ BACKFILLED AFTER
(SEE NOTE 9) \ ` \ \ \`\ ��/ / ` `\ F`_ �`\\ 1
\ ` \ _ , I � (GASTO-016) __ _ \\ ��\I REMOVAL OF CCR
I III i TL 2A10 230kV `\`\\\\\ \ \\\ \`� / I \--^--- /__________________ _ �\�\\\ .-
( III II I' I CONCEPTUAL NSLF FOOTPRINT ( ) \ ► \ _ ' I
TOWER 4 \\ \\\\�\ \ �`�`� \ J �`--------------'-_-' =__- f--------
SEE NOTE 1.2 IN GENERAL ` 1 \ — — — _ �/ ''------- — �`� \\ ►
--------
(SEE NOTE 9)
`-- ' 11 \I', NOTES, DRAWING NO / / ( 1 11►\ \` `,_ FUTURE STORMWATER '' ' r \\ ` 11111 11 1 CONCEPTUAL DAM BREACH AREA
I / // ► ►1\ \ \� �` - i' / / IIIIII I ' I11
\�_-r 1 1► I ALN C999.001.012) I I / LLI I ► Ilk \ -- R6d MANAGEMENT AREA (SEE NOTE 1.3 IN GENERAL NOTES,
DRAWING NO. ALN_C999.001.012)
Ld
\I\ AR3yI I�AI
J ___II
1\
I r ` ----�' r- \ r Ia' ��/\T� R�-r• i II LAKE WYLIE/
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_
ct Q�. I I�— CATAWBA RIVER
�° TOWER 5 RAB NORTH - -_\ `\ / /' _ /
I 1 �►'1
/// / �'IIIlIIIlIIIl II I II IIIIIIII IIIl
IIi
�I
IIT
I1I
NORMAL W.S.E. 565.7 FT.(SEE NOTE 9) ARs STORMWATER qO
I CHANNEL Esz
R1 PROP. CONCRETE '/ -,
APRON TL 1A482 (100kV)
r)/
'i I ^- 0//' / r'1
9 . (SEE NOTE 9)
lil I 11 I
R2 __ ��.'' "\ i /' . -9 ' --' Y, - FJ ./ �/ / I C) IIIU111� I LAKE WYLIE
\� 1\ I\ l _ __/ Cr , \`�� �i�'ly/j __-- .p — -�` --- ' .-C7 `--- _ �' ''-/i'� �i'% / /' ,' / / ,/' I IIIIII +I ! I I 100-YEAR FLOOD
i- \ �, _',R3 ,=-__: '�-�tt- — -�- ! �5 r' IIII it II iiill�l I 1 ELEVATION: 571.3 FT.
\\\\` \ t� \ \\ \ / _ _ _ — o /.__R4'--- --- �' RAB SOUTH '�/' i .5 .' rul II I Iulllli O
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STORMWATER / /
\�\ \\ III l 1
_ \`\ \ - �`\ 1 CHANNEL ' _�--;'_',-,"'✓ III IIIII I11 Ilj EMERGENCY SPILLWAY
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ES1, W \ \ / / -/�_ - I III II I� I I 1
_�_ y b _� \ -_�\_---' �( f� _ - AREA TO BE BACKFILLED ( )
\ \� FUTURE STORMWATER _ - \V \ \ ,'� - Iii Ili I TO BE ABANDONED
1 _ STORMWATER \ ji;a
_.._`'! Tom;_ , D4 `� \\ // - -�\MANAGEMENT AREA • � ,\ -\ � / , ,, �/�I',.-- \ \AFTER REMOVAL OF CCR II II IIIIDIVERSION'- l I
'�.ulllll
CHANNEL \ - - _ �„ _
D3, ----� � _\_ " I - �,Rsa\ \ I + u1 nll PERMITTED SPILLWAY
�` _ \ i ` \\ �'-�� - I►'1� - ----- TL 1A482 100kV �� FUTURE STORMWATER ` `\ _ ___ I1 �1 r •
\ �\ \ -_ /"/��•�; / `p i--- L/ - ----- ( ) -_== __ �/ // (TO BE ABANDONED)
,--- \ \ \ \ ___ TOWER X - MANAGEMENT AREA
2 I \'\\`- \\`\\ AR6AR7 - -/ _ __ —_ -_ _ 625_=-�.,,��►►///'1,�i/�/ /I NPDES
---------- -_ _ = = --_ -_-` ��ill ICI((` OUTFACE
TH DIKEIIIIIII II SWO15
NOR
_
TL 1A606 (100kV) \ I \ ll\_-___----______- _-
1 / �' --, �� --___-__=_- II III Ir=_-------- , IIII II! InIIi IIIIII^11 COAL YARD SUMP
TOWER 6 \\ \�` _ _ _ _ _ _ — - _ _IIIIII u!Ililf i / /^ IIII II IIIII I it
II
r / I , IIII I I DISCHARGE
SEE NOTE 9
I \ . ( ) \ } ) II II ul qj1 �i' �� / , III III 1+ IIII
I / Ill TL 1A482 (100kV) / J \ III' llNR3 I I
1 I 625 I / / (ABANDONED)
w 1 I NR1 III
JIL
----%( ilv
---�-� , NR2 ®€ I fill ROw / ` ! / IIIIIII I 1
'Luy
N,1 I / r1 'ram= - _ \ �i` �// RO �_k9E i�f�
1OW- ROl / '
W
R
it
, 'IiI lII�lco0�ioI
lt'00 c�\�l� I IIlIl III tIIhlIlI�;iI
I/
11
CONCEPTUAL DAM BREACH AREA
1
(SEE NOTE 1.3 IN GENERAL NOTES,
°� - / lt1 �r r I I►II IIIII IIIIIIII DRAWING NO. ALN_C999.001.012)
LLj, W � I ; I IIIII - I jllll jljlll+ I
° , ° �' a o •_� - CHEMICAL' r i 1 I ' i�\ illir IIIII IIIIIIII` r
BUILDING ,j \ 1` 1 I Ii �'11'1j1 I 1j1 II'I�
(REMOVED)::)
' I I �I IIIII �j111 1jllliill
_ .�- lu I I I IIII II111
LAKE WYLIE/
E � 1 �\ `\ � \ r III I11 IIIII I l 111 l l'i
e / , TL 1A606 -' ^ I I 1 \ \ IIIIIIII IIII III 111 Ill IIl IlIIIIIII
IiI
�I CATAWBA RIVER
(100kV) 111NORMAL W.S.E.
11
T- ;\\'J
565.7 FT.
\I\ OLIJI- IIIII IIIII l
TL 5N5 -- - , \ 11 \ O / 7 II III lj1 I III I I�
II r " ! CONCEPTUAL ABLF FOOTPRINT 11111 IIIII IIIIII'
(500kV) �� _ / >✓ t\ ! / / III III l!II! I IIII
O / /I, / ��5 5 (SEE NOTE 1.2 IN GENERAL III w Illll�
( \ \I \ \ \�\ I I \� \ TL 2A10 \ _ '^ - /% I � I /r 0� NOTES, DRAWING NO I II Y o IIIIII y
�� I l I/ \\ \\ 11 -� -\` \\ - i� / I5 ALN_C999.001.012) IIII III I/I ►\ \\
i /1 i t 1 iYY I \\ 1\ \ - (230kV) - / / i I H l I l I II \
/ / 1/ / Ali 11\\1 r \\ \�" ,_ O '�✓-�i/ Iii �Z5 I ;Icnvi
Iuj (D IIII \ LAKE WYLIE 100-YEAR FLOOD
O \I \ \ 1 ELEVATION: 571.3 FT.
( AREA TO BE BACKFILLED - ' \\ AAB WEST IIII \ \ \
\, IIII Illll� \ \ JURISDICTIONAL STREAM
f AFTER REMOVAL OF CCR - STORMWATER III Il II 1 \
/`\ �\ -- ` \ _ CHANNEL
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/ / / ♦ / / �� // ` \\ -' Iv
W
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/
/, r ,�r / /�/ �\ \\___` - \ \ \`♦ 1 / /If l IIIII l I I 11111� f
1/ , , 1 // ` ♦ - / I / / / /
/ /I�/ \ //�575
/ / � // ��\-____\�\ ^ ♦- _ ,w/ / �' / __- --'- �7- �i• '- /�`�--___-� `�� IIII IIII I �
— \ I1 I I I I
A4��1l I IIIIIIII III
i' \ \\\FUTURE STORMWATER
i I III I III
I I IIII V
/ i /%;�i \ \`• -,`�` MANAGEMENT AREA A5
.Al �� l
_ - _�'J 1 _ \1 ' I AREA TO BE BACKFILLED =_ _ -ill III I II IIII
i 1 l / - \ \, - _-__/ - -\ \ I / I -,,I IIII 1 it Ill I IIIIIII CONCEPTUAL DAM BREACH AREA
j - _ �' , �\ III I I
_\ \ \> \ / /______ _ EXISTING AFTER REMOVAL OF CCR \\ I IIIIIII ulll I +I III (SEE NOTE 1.3 IN GENERAL NOTES,
I / I ✓ // __/--_ -_ �� � \ /-----'' / / �l l \ 1 / ,' � ,� � ��_ `__ _\ `\\\\�Ij111 111 IIIIII III I,�\
Ilk j/ / I I I \ DRAWING NO. ALN C999.001.012
WTS PAD �_�_ I I 1 1 _ )
\ \ \ \ / IIII\ 1 6 CHEMICAL // I— ��� \\\\ \`\�i�// ��
`i�T \-' AAB SOUTH I I1�\`il / . \ \ '/q/�l%ill
AAB SOUTH, `,. \ `' -_ r BUILDING / I =� /�i
\\ STORMWATER / 1 ! �� lam/ , ` ___i:' i /// \ \
- / NPDES OUTFACE 002
STORMWATER . \ \ \ \- — / / (REMOVED) ,/�., ,/,
-� \ �_� `�� CHANNEL 11 I / / / / I
CHANNEL \ �\ ' / \ \a,\` `_-_- ! / ! \ PERMITTED SPILLWAY
\ \ \�` \ 1► III / `� ' / 1 /• \ ' _ _ • 1 1 I , l \
\ I 1 \ \ X I \ ► \ 1 \ \ 1\ ,tom- __ \ ��_ \ - _ \ I I� / / / ,� / / r / r = i X / .r,\ \ (TO BE ABANDONED)
LLJ
`\ 1\` I --'� \ "•� ( \\ `-may uj_- _ - ,rf L \ �. N.
�\ _ PROP. CONCRETE /
JURISDICTIONAL STREAM
( i APRON `�\�\ \\ \\
\ \ -j !' \ \ Ilk
U Cu
(01 I I rr / y/ `O►♦ 1 \el
46
CONCEPTUAL SSLF FOOTPRINT \ ,
44j \'�_'�-l7 \' 700 (SEE NOTE 1.2 IN GENERAL\�
// /r \� I O ° •+�-�_,, `\�\ `�\ \__- NOTES, DRAWING NO FUTURE STORMWATER
\�' '' /'� • \�` I-/ X _ `� ---__ i ,'/ , 675_ ALNC999.001.012) _ -,'� ` ` MANAGEMENT AREA
_ /
rd
40
// �, i / / / \ \ r r �� ___- �\ \ �•�`\, -- `-__/ 1\ \ JURISDICTIONAL STREAMN.
TENTHS 10 20 30
ALN C999.001.030 wv. 2
LEGEND
625 PROPOSED MAJOR CONTOUR (25 FOOT)
PROPOSED MINOR CONTOUR (5 FOOT)
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
LL LIMITS OF EXISTING RAB LANDFILL LINER
APPROXIMATE ASH BASIN WASTE BOUNDARY
�•••LIMITS OF WATER
100-YR 100 YR FLOOD LINE
__�­ _�O_ _�O_ — STORMWATER FLOW DIRECTION
JURISDICTIONAL STREAM (SEE NOTE 3)
HATCH LEGEND
WETLAND (SEE NOTE 3)
FUTURE STORMWATER MANAGEMENT AREA
KInTP:C
1. LIMITS OF IMPOUNDED ASH ARE APPROXIMATE.
2. REFER TO SHEET ALN_C999.001.012 FOR REFERENCES.
3. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES SOUTH OF THE STATION
WITHIN DUKE ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM AMEC'S JUNE 24,
2015 NATURAL RESOURCES TECHNICAL REPORT AND SURVEYED BY MCKIM & CREED IN
FEBRUARY 2016. STREAM AND WETLANDS NORTH OF THE STATION WITHIN THE DUKE
z
ENERGY PROPERTY BOUNDARY WERE OBTAINED FROM THE WETLAND DELINEATION
I
0
SURVEY PERFORMED BY WSP DATED MARCH 2O23.
0
0
4. WORK WITHIN THE 100-YEAR FLOODPLAIN ALONG THE SHORELINE OF THE CATAWBA
RIVER MAY REQUIRE PERMITTING.
0
5. EXISTING TRUCK WASH AND SCALES TO THE NORTH OF ASH FILL 1 MAY NOT BE
O
LOCATED WITHIN THE ASH BASIN LIMITS SHOWN ON THE DRAWINGS. THIS WILL NEED
TO BE VERIFIED PRIOR TO CONSTRUCTION.
0
6. THE INTENT IN BREACHING THE RAB AND AAB DIKES IS TO REMOVE THE DIKES FROM
W
REGULATION AS DAMS. THIS WILL BE ACCOMPLISHED BY PERFORMING A FULL LOCAL
0
BREACH, I.E. TO REMOVE A PORTION OF THE DIKE COMPLETELY DOWN TO NATIVE
GROUND AT ITS LOWEST POINT SUCH THAT THE DIKE WILL NOT IMPOUND WATER OR
CCR MATERIAL. A SEPARATE NEW BERM WILL BE BUILT AROUND THE FUTURE
STORMWATER MANAGEMENT AREA FOR LONG-TERM STORMWATER TREATMENT.
N
7. STORMWATER CHANNEL GRADING IS NOT SHOWN ON THIS PLAN. CHANNEL LAYOUTS
HAVE BEEN CONSIDERED AT A CONCEPT LEVEL TO VERIFY ITS FEASIBILITY AND WILL BE
SHOWN AS PART OF FUTURE DETAILED DESIGN. DETAILS OF THE LANDFILL
STORMWATER DESIGN ARE INCLUDED IN APPENDIX C1.
N
8. ASH SURROUNDING TRANSMISSION TOWERS TO REMAIN AND WILL BE CAPPED AS
SHOWN ON SHEETS 031 (TYPICAL PLAN AND PROFILE) AND 037 (DETAILS).
0 300 600 900
NOT FOR CONSTRUCTION
GRAPHIC SCALE (IN FEET)
TITLE
FINAL SURFACE WATER MANAGEMENT
PLAN - ASH BASINS
)%=mcom
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
\,\,1►trlrill,,,
^
r UKE
SCALE: AS SHOWN
DES: NSF
DWG TYPE:. DWG
DFTR: SVV
`\\\,\\A CARO,��'''
JOB N0: 60702384
CHKD: JDM
O ��SS, ' `/
' ENElk%17Y®
DATE: 07-27-2023
ENGR: JDM
Z �:Z SEAL �'. y
�- 0439g7'`: E
FILENAME:ALN_C999.001.030 SURFACE WATER MANAGEMENT PLAN.M6D:
JDM
N Erc- - O<C�
DWG SIZE
DRAWING NO.
REVISION
ANSI D
7�
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675
625 TT \ ,` ► ✓ /
N.
0 300 600 900
GRAPHIC SCALE (IN FEET)
LEGEND
625 PROPOSED MAJOR CONTOUR (25 FOOT)
620 PROPOSED MINOR CONTOUR (5 FOOT)
620 EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
— — DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH
------------------ ASH STORAGE BOUNDARY
100—YR 100 YR FLOOD LINE
PROPOSED UNPAVED ROADS
APPROXIMATE ASH BASIN WASTE BOUNDARY
- - - - JURISDICTIONAL STREAM
nIOTP:-q
1. TO IMPROVE CLARITY, ONLY 5-FOOT CONTOURS ARE SHOWN ON THIS
SHEET.
NOT FOR CONSTRUCTION
LAKE WYLIE/ CATAWBA
TITLE
RIVER
FINAL CLOSURE GRADING CROSS
NORMAL W.S.E. 565.7 FT
—
SECTION LAYOUT PLAN
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
DUKE'
SCALE: AS SHOWN
DES: NSF
DWG TYPE:. DWG
DFTR: SVV
�
JOB N0: 60702384
CHKD: JDM
O o�ESs�O
ENERGY[DATE.
07-27-2023
ENGR: JDM
'`� �
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SEAL
C'
043997 '-: =
FILENAME: ALN_C999.001.031 039 FINAL GRADING CROSS SECTIONS.DWG
APPD: JDM
DWG SIZE
DRAWING NO.
REVISION
ANSI D
22.0"x34.0"
ALN C999.001 -031
2
0
,Z, 3
z
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•
0
N
INCHES
TENTHS 10 20 30
1

ALN C999-001.032
mv• 2
750
740
730
720
710
700
ill
.:l
670
..e
650
640
630
620
610
.fe
590
580
570
560
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 r7 o 0 O N N 7 NN N
INCHES 1 2 3 ITENTHS 10
LEGEND
EXISTING GRADES
HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
PROPOSED SOIL FILL
PROPOSED ASH FILL
Q4 2022 GROUNDWATER
FREE WATER PRIOR TO DECANTING
ninTrc
1. BASIS OF BEARINGS: NC GRID NAD83/2011. ELEVATIONS ARE BASED ON NAVD88.
2. THE INTENT IN BREACHING THE RAB AND AAB DIKES IS TO REMOVE THE DIKES FROM REGULATION AS
DAMS. THIS WILL BE ACCOMPLISHED BY PERFORMING A FULL LOCAL BREACH, I.E. TO REMOVE A PORTION
OF THE DIKE COMPLETELY DOWN TO NATIVE GROUND AT ITS LOWEST POINT SUCH THAT THE DIKE WILL
NOT IMPOUND WATER OR CCR MATERIAL. A SEPARATE NEW BERM WILL BE BUILT AROUND THE FUTURE
STORMWATER MANAGEMENT AREA FOR LONG TERM STORMWATER MANAGEMENT.
3. THESE PLANS DO NOT INCLUDE DAM BREACHING. SPECIFIC PLANS FOR THE WORK WILL BE SUBMITTED AT
A LATER DATE.
0
O O O
O O O
N � �
N N N
SECTION A -A'
O
O
O
O
O
O
O
O
O
O
O
O
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O
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REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM
SHIFT OF -0.75 FEET WAS APPLIED).
2. EXISTING GRADES ARE BASED ON AERIAL TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
0 15 30 45
VERTICAL SCALE (IN FEET)
0 150 300 450
HORIZONTAL SCALE (IN FEET)
NOT FOR CONSTRUCTION
TITLE
FINAL CLOSURE GRADING CROSS
SECTIONS I
)%=mcom
ALLEN STEAM STATION
CCR SURFACE
IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
.0 ,,
DUKE
SCALE: AS SHOWN
DES:
NSF
C��O��''
DWG
DWG TYPE:. DWG
DFTR:
SVV
JOB N0: 60702384
CHKD:
JDM
O ��SS, �
I ENElk%m7YC'
'`/
-
Z �: SEAL �. y
CL
DATE: 07-27-2023
ENGR:
JDM
043997 : =
FILENAME:
ALN_C999,001,031-039 FINAL GRADING CROSS SECTIONS,DWG
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
�?G/ N Era' O<C�
ANSI D
22.0"x34.0"
ALN C999 - 001 . 032
2
9
1
10
1
r
z
n
co
co
co
•
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0
N

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mv• 2
5N5 (500kV) TRANSMISSION LINE SAG ELEVATIONS
(SEE REFERENCE 5, THIS SHEET) Q
I I
680
2A10 (230kV) TRANSMISSION LINE SAG ELEVATIONS 1A482 (100kV) TRANSMISSION LINE MAX. SAG ELEVATIONS
(SEE REFERENCE 5, THIS SHEET) F� (SEE REFERENCE 5, THIS SHEET)
670 - - -
O
1A606 (100kV) TRANSMISSION LINE SAG ELEVATIONS
(SEE REFERENCE 5, THIS SHEET)
660
O O
650 - -
RAB SOUTH STORMWATER CHANNEL EXISTING GRADE
640
630
I �
620
_ - HISTORICAL GRADE
_ Q4 2022 GROUNDWATER
(SEE REFERENCE 4)
610
600
CONNECTION TO RAB NORTH
STORMWATER CHANNEL SECTION A -A'
590 -----
580
570
560 1 1 1
SOIL FILL ABOVE HISTORIC GRADE
550 I_
� -
0 0 0 0 O O O 0 0 0 O o 0 o O O O O O O o 0 0 o O O O o 0 0 0 0 0 0
O O O O o 0 o O O O 0 0 0 0 O O O O O O o 0 0 o O O O o 0 0 0 0 0 0
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
O N n In (0 r- 00 0) 0 N Ul) (o � 00 0) O N V-) `t 117 O � 00 m O N M
N N N N N N N N N N M
LEGEND SECTION B-Bill
EXISTING GRADES
- - - - - - - - - - - -
- HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
�8ml
PROPOSED SOIL FILL
PROPOSED ASH FILL
Q4 2022 GROUNDWATER
NOTES
1. BASIS OF BEARINGS: NC GRID NAD83/2011. ELEVATIONS ARE BASED ON NAVD88.
2. THE INTENT IN BREACHING THE RAB AND AAB DIKES IS TO REMOVE THE DIKES FROM REGULATION AS
DAMS. THIS WILL BE ACCOMPLISHED BY PERFORMING A FULL LOCAL BREACH, I.E. TO REMOVE A PORTION
OF THE DIKE COMPLETELY DOWN TO NATIVE GROUND AT ITS LOWEST POINT SUCH THAT THE DIKE WILL
NOT IMPOUND WATER OR CCR MATERIAL. A SEPARATE NEW BERM WILL BE BUILT AROUND THE FUTURE
STORMWATER MANAGEMENT AREA FOR LONG TERM STORMWATER MANAGEMENT.
3. THESE PLANS DO NOT INCLUDE DAM BREACHING. SPECIFIC PLANS FOR THE WORK WILL BE SUBMITTED AT
A LATER DATE.
INCHES 1 2 3 TENTHS 10
REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM
SHIFT OF -0.75 FEET WAS APPLIED).
2. EXISTING GRADES ARE BASED ON AERIAL TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
KEY MAP
1
1 �
� 1
RAB DIKE BREACH
0 0 0 0 o O 0 0 0 0 0 o O o 0
0 0 0 0 o O o 0 0 0 0 o O o 0
+ + + + + + + + + + + + + + +
In O 00 00 O N r In (o r- 00
M ro r r) re) -
0 15 30 45
VERTICAL SCALE (IN FEET)
0 150 300 450
HORIZONTAL SCALE (IN FEET)
NOT FOR CONSTRUCTION
TITLE
FINAL CLOSURE GRADING CROSS
SECTIONS II
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
DUKE
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:.DWG
DFTR:
SVV
���\ltilllll!/
\A CAqO//
JOB
CHKD:
JDM
ENFnt
o O 7
' a SEAL q-
0
DATENO 0077027-2023
ENGR:
JDM
y
FILENAME:
ALN C999.001.031-039 FINAL GRADING CROSS SECTIONSBG
APPD:
JDM
��: �0439g �'-: =
DWG SIZE
DRAWING NO.
REVISION
��' O •, G/NErc O�C�
ANSI D
�����`��
7-2) 3
22.0"x34.0"
ALN C999.001 .033
2
9
1
10
1

PLAN LEGEND
ALN C999-001.034
REV. 2
IT
r
m
D
O
z
INCHES
SECTION D-D' - PLAN
680
51N15 (500kV) TRANSMISSION LINE SAG ELEVATIONS
670 (AT -745', NOT SHOWN) (SEE REFERENCE 5, THIS SHEET)
650
640
630
620
610
0
O
+
0
0
0
+
STATION
SECTION D-D' - PROFILE
TENTHS 10 20 30
0
0
+
N
w
0
w
0
w
0
TRANSMISSION TOWER (TYP.)
I
W
0
w
0
ATIONS
SHEET)
R (TYP.; NOT TO SCALE)
S TO CONCRETE 5
JNNECTION 37
COVER G
37
ROPOSED GRADE
3EE NOTE 2)
TYPICAL 7
ANCHOR
TRENCH 37
W
0
W
O
ril
W
O
W
O
L
625
-625-
100-YR
PROPOSED MAJOR CONTOUR (25 FOOT)
PROPOSED MINOR CONTOUR (5 FOOT)
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
APPROXIMATE LIMITS OF IMPOUNDED ASH
APPROXIMATE ASH BASIN WASTE BOUNDARY
LIMITS OF WATER
100 YR FLOOD LINE
0 30 60 90
GRAPHIC SCALE (IN FEET)
ninTr_:c
1. BASIS OF BEARINGS: NC GRID NAD83/2011. ELEVATIONS ARE BASED ON NAVD88.
2. THE LIMITS OF EXCAVATION AND SLOPES SURROUNDING THE TRANSMISSION TOWER BASE IS SUBJECT TO
STABILITY REQUIREMENTS AS DETERMINED BY DETAILED STRUCTURAL AND GEOTECHNICAL ANALYSES TO
BE PERFORMED AT A LATER DATE.
3. IN ACCORDANCE WITH THE SETTLEMENT AGREEMENT BETWEEN DUKE ENERGY AND NCDEQ (EFFECTIVE
DATE 12/31/19), ASH WILL REMAIN FOR STRUCTURAL STABILITY PURPOSES AROUND THE GRILLAGE
FOUNDATIONS OF THE OVERHEAD TRANSMISSION LINE SUPPORT TOWERS CURRENTLY LOCATED WITHIN
THE RAB. ASH TO REMAIN AROUND THE SUPPORT TOWERS IS AND WILL CONTINUE TO BE UNSATURATED
BASED ON COMPARING HISTORICAL BOTTOM OF ASH ELEVATIONS AND GROUNDWATER ELEVATIONS. THE
ESTIMATED VOLUME OF ASH TO REMAIN AROUND THE SUPPORT TOWERS IS APPROX. 20,000 TONS (16,600
CUBIC YARDS). ASH IN THESE AREAS WILL BE CAPPED WITH GEOMEMBRANE.
PROFILE LEGEND
EXISTING GRADES
— — — — — — — — — — — — — HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
EXISTING ASH TO REMAIN
Q4 2022 GROUNDWATER
0 7.5 15 22.5
0 VERTICAL SCALE (IN FEET)
O
+
0 30 60 90
HORIZONTAL SCALE (IN FEET)
C
-
SAO
.2 1-2 - - . )
W�P, t
co
031-
\I
KEY MAP
REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM
SHIFT OF -0.75 FEET WAS APPLIED).
2. EXISTING GRADES ARE BASED ON AERIAL TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
NOT FOR CONSTRUCTION
TITLE
FINAL CLOSURE GRADING CROSS
SECTIONS III
ALLEN STEAM STATION
CCR SURFACE
IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
DUKE
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:. DWG
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ENERGY®
DATE: 07-27-2023
ENGR:
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FILENAME:
ALN_C999,001,031-039 FINAL GRADING CROSS SECTIONS,DWG
APPD:
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DWG SIZE
DRAWING NO.
REVISION
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22.0"x34.0"
ALN C999.001 .034
2
9
1
10
1
D
r
z
n
Co
Co
Co
0
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o
N

ALN C999.001 .035 IRv. 2
e
e
670
i
650
-K
f
.1•
590
580
570
me
550
2A10
(230kV) TRANSMISSION
LINE SAG ELEVATIONS
(SEE REFERENCE 5, THIS SHEET)
5N5 (500kV)
LINE SAG ELEVATIONS
TRANSMISSION
(SEE REFERENCE
1A606
5, THIS SHEET)
I
(100kV) TRANSMISSION LINE SAG ELEVATIONS
(SEE REFERENCE 5, THIS SHEET)
EXISTING
I
I
GRADE
—� APPROX. WATER LEVEL 617.0'
_
I
I
I
\
\
�
I
\
'I
Q4 2022 GROUNDWATER
(SEE REFERENCE 4)
r
_
1
I
ZR
PROPOSED AAB STORMWATER AAB DIKE BREACH
I
AAB SOUTH STORMWATER CHANNEL
DETENTION POND (SEE NOTE 2)
I
— — — J
(THIS GRADE LINE IS FOR INTERPRETIVE
INFORMATION ONLY, CHANNEL DESIGN TO BE
(DETAILED DESIGN TO BE PROVIDED WITH
CONSTRUCTION LEVEL DRAWINGS) I
PROVIDED WITH CONSTRUCTION LEVEL DRAWINGS)
1
PRELIMINARY BREACH I
ELEV. 570'
HISTORICAL GRADE
/
\
SOIL FILL ABOVE HISTORIC
GRADE
' /
\
i
I
ARMORED
LETDOWN
\
I
I
� J
101000040
IMINAWN
0 0 O
0 0 0
N r0
LEGEND
O O O 0 0 O 0 0 0 0 0 0 0 0
0 0 0 0 0 0 O O O O O O O O
+ + + + + + + + + + + + + +
� u') Q0 00 O O N r� UO CO I
EXISTING GRADES
HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
PROPOSED SOIL FILL
PROPOSED ASH FILL
Q4 2022 GROUNDWATER
FREE WATER PRIOR TO DECANTING
\ of
REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM
SHIFT OF -0.75 FEET WAS APPLIED).
2. EXISTING GRADES ARE BASED ON AERIAL TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
INCHES 1 2 3 TENTHS 10 20 30
�1 Q
a
0 0 0
0 0 0
00 O O
SECTION D-D'
/ I �
I �
Ozz
— / "�
� si
KEY MAP
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
o
O
o
O
O
o
o
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
N
110
�
L0
c0
r-
00
O
O
N
r0
�
L0
O
r-
00
O
O
N
N
N
N
N
N
N
N
N
N
re)
M
r)
r)
r)
r)
r)
r0
r0
r0
`t
KlnTGC
1. BASIS OF BEARINGS: NC GRID NAD83/2011. ELEVATIONS ARE BASED ON NAVD88.
2. THE INTENT IN BREACHING THE RAB AND AAB DIKES IS TO REMOVE THE DIKES FROM REGULATION AS
DAMS. THIS WILL BE ACCOMPLISHED BY PERFORMING A FULL LOCAL BREACH, I.E. TO REMOVE A PORTION
OF THE DIKE COMPLETELY DOWN TO NATIVE GROUND AT ITS LOWEST POINT SUCH THAT THE DIKE WILL
NOT IMPOUND WATER OR CCR MATERIAL. A SEPARATE NEW BERM WILL BE BUILT AROUND THE FUTURE
STORMWATER MANAGEMENT AREA FOR LONG TERM STORMWATER MANAGEMENT.
3. THESE PLANS DO NOT INCLUDE DAM BREACHING. SPECIFIC PLANS FOR THE WORK WILL BE SUBMITTED AT
A LATER DATE.
0 15 30 45
VERTICAL SCALE (IN FEET)
0 150 300 450
HORIZONTAL SCALE (IN FEET)
NOT FOR CONSTRUCTION
TITLE
FINAL CLOSURE GRADING CROSS
SECTIONS IV
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
� D UKE
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:. DWG
DFTR:
SVV
CgR��
JOB N0: 60702384
CHKD:
JDM
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�
ENFnmt%lY®
DATE : 07 - 27 - 2023
ENGR :
JDM
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` SEAS y y '
;'a
=c- - 043997: =
FILENAME:
ALN_ C999,001.031-039 FINAL GRADING CROSS SECTIONS,DWG
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
O`��
ANSI D
7�
7-2) 3
22.0"x34.0"
ALN C 9 9 9.0 01 . 0 3 5
2
9
1
10
1
0
w
cn
0
N

ALN C999.001 .036
mv• 2
LEGEND
EXISTING GRADES
HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
PROPOSED SOIL FILL
PROPOSED ASH FILL
Q4 2022 GROUNDWATER
FREE WATER PRIOR TO DECANTING
NOTES
1. BASIS OF BEARINGS: NC GRID NAD83/2011. ELEVATIONS ARE BASED ON NAVD88.
REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM
SHIFT OF -0.75 FEET WAS APPLIED).
2. EXISTING GRADES ARE BASED ON AERIAL TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
INCHES
TENTHS 10 20 30
660
EXISTING GRADE
650
640 I
1 �
I �
630 I
Q4 2022 GROUNDWATER I
(SEE REFERENCE 4) I
620 I
1 �
I AAB DIKE BREACH
1
610
HISTORICAL GRADE I
I
600 ---
PROPOSED AAB STORMWATER I
590 DETENTION POND I
(DETAILED DESIGN TO BE PROVIDED I PRELIMINARY BREACH
WITH CONSTRUCTION LEVEL DRAWINGS) I ELEV. 570'
1
580 \ 1
� I
570
I
560
0 0 0 0 0 0 0 0 0 0 0 0 0 0
O O 0 0 0 O O O O 0 0 0 0 0
+ + + + + + + + + + 0 ± N I+
O N I") It � O � cc)
SECTION E-E'
l \ ♦ ��'�
J. r� 07
A=COM
SEAL
0 15 30 45
VERTICAL SCALE (IN FEET)
0 150 300 450
HORIZONTAL SCALE (IN FEET)
N.C. ENGINEERING LICENSE NO.
F-0342
o
�ESS� l*
a SEAL q : y
c- 043997 Z
O
7-2) 3
Le
E
l r.. 033 6 ' 1 _ 033
tu
KEY MAP
NOT FOR CONSTRUCTION
TITLE
FINAL CLOSURE GRADING CROSS
SECTIONS V
ALLEN STEAM STATION
CCR SURFACE
IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
FOR
ISSUED FOR APPROVAL
DUKE
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:.DWG
DFTR:
SVV
ENERGY®
JOB NO
00707- 023
DATE:
ENGR:
JDM
FILENAME:
ALN C999.001.031-039 FINAL GRADING CROSS SECTIONS.DWG
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
ANSI
22.0"x34.0"
ALN C999.001 .036
2
1)
10
1
0
W
m
0
N

ALN C999.001.037
LEGEND
mv• 2
820
810
790
780
770
760
750
740
730
720
710
700
.••
. 6
670
.••
650
640
630
620
610
F-Ters
590
580
570
NOTE: FINAL HEIGHT AND DETAILED DESIGN OF
LANDFILL MAY VARY FROM WHAT IS SHOWN HERE
AND WILL BE FURTHER OPTIMIZED AS A PART OF
THE RELEVANT CONSTRUCTION LEVEL DRAWINGS
CONCEPTUAL AAB LANDFILL FOOTPRINT/GRADING
(SEE NOTE 1.2 IN GENERAL NOTES, DRAWING NO.
ALN_C999.001.012)
I
I
(100kV) TRANSMISSION
LINE MAX. SAG ELEVATIONS
(SEE REFERENCE 5, THIS SHEET)
1A482
0
AAB NORTH
DIKE BREACH
I
\
EXISTING GRADE
I\
Q4 2022 GROUNDWATER
(SEE REFERENCE 4)
AAB SOUTH STORMWATER CHANNEL
\ AREA (TYPICAL)
1
1
\
\
aim
w__
\
i
111
SOIL FILL ABOVE HISTORIC GRADE
/
/
HISTORICAL GRADE
INCHES
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 N
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 Ln
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
O O CO 00 O O N r L � 00 0) ON
N N N N N N N N N N 0
TENTHS 10
SECTION F-F'
0
w 1nTr r%
1. BASIS OF BEARINGS: NC GRID NAD83/2011. ELEVATIONS ARE BASED ON NAVD88.
EXISTING GRADES
HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
PROPOSED SOIL FILL
_
PROPOSED ASH FILL
Q4 2022 GROUNDWATER
FREE WATER PRIOR TO DECANTING
—
REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM
SHIFT OF -0.75 FEET WAS APPLIED).
2. EXISTING GRADES ARE BASED ON AERIAL TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
K
11j r
4
\;\l-\. N—V
-�
1 Dill '
I Allfh ��.
a\\l{ jai\\! �``-
LLCD
<L \
`\
0 15 30 45
VERTICAL SCALE (IN FEET)
0 150 300 450
HORIZONTAL SCALE (IN FEET)
KEY MAP
TITLE
N.C. ENGINEERING LICENSE NO.
F-0342
SEAL
��1 USllI111//
1A C A Ro
:a AL q- y
c- 043997 '_ =
�2G/NErc�-
7-27 3
IF NOT FOR CONSTRUCTION
FINAL CLOSURE GRADING CROSS
SECTIONS VI
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
FOR
ISSUED FOR APPROVAL
DUKEDWG
ENFrlt"4*\/
®
SCALE: AS SHOWN
DES:
NSF
TYPE:.DWG
DFTR:
SVV
JOB NO: 60702384
CHKD:
JDM
DATE: 07-27-2023
ENGR:
JDM
FILENAME:
ALN C999.001 .031 -039 FINAL GRADING CROSS SECTIONS.M
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
ANSI
22.0"x34.0"
ALN C999.001 .037
2
1)
10
1
0
w

REV. 2
820
810
790
780
770
760
750
740
730
720
710
700
m
.:•
670
mood,
650
•
630
620
610
9
we
580
570
6711910
INCHES
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 CD O O O O O
+ + + + + + + + + + + + + + + + + + + + + + + + + + +
N rl� � d) cc r-- 00 O O N N-) "t L0 c0 rl- 00 O O N M L (o �
N N N N N N N N
SECTION G-G'
NOTES
1. BASIS OF BEARINGS: NC GRID NAD83/2011. ELEVATIONS ARE BASED ON NAVD88.
2 3 TENTHS 10 20 30 4 1 6
ALN C999.001.038
LEGEND
EXISTING GRADES
— — — — — — — — — — HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
PROPOSED SOIL FILL
PROPOSED ASH FILL
Q4 2022 GROUNDWATER
REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM
SHIFT OF -0.75 FEET WAS APPLIED).
2. EXISTING GRADES ARE BASED ON AERIAL TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
NOT FOR CONSTRUCTION
KEY MAP
TITLE
FINAL CLOSURE GRADING CROSS
SECTIONS VII
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR F-0342 ISSUED FOR APPROVAL
SEAL SCALE: AS SHOWN DES: NSF
0 15 30 45 �����y�Iylr��//// DUKE
RO�''' DWG TYPE:. DWG DFTR: SVV
` O ...��SS,•'• `/ � ` ENERGY® JOB N0: 60702384 CHKD: JDM
VERTICAL SCALE (IN FEET) = SEAL �, y DATE : 07 - 27 - 2023 ENGR : JDM
E 043997 '-: = FILENAME: ALN C999.001.031-039 FINAL GRADING CROSS SECTIONS.DWG APPD: JDM
0 150 300 450 � � '� —
�; DWG SIZE DRAWING NO. REVISION
HORIZONTAL SCALE (IN FEET) f �����` ANSI D
7�
22.0"x34.0" ALN C 9 9 9.0 01 .0 3 8 2
7-2) 3
8 9 10
z
co
0
0
0
w
co
0
N

ALN C999.001.039
mv• 2
LEGEND
EXISTING GRADES
— — — — — — — — — — — — — HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
PROPOSED SOIL FILL
PROPOSED ASH FILL
Q4 2022 GROUNDWATER
rxinTP-q
1. BASIS OF BEARINGS: NC GRID NAD83/2011. ELEVATIONS ARE BASED ON NAVD88.
2. THE INTENT IN BREACHING THE RAB AND AAB DIKES IS TO REMOVE THE DIKES FROM REGULATION AS
DAMS. THIS WILL BE ACCOMPLISHED BY PERFORMING A FULL LOCAL BREACH, I.E. TO REMOVE A PORTION
OF THE DIKE COMPLETELY DOWN TO NATIVE GROUND AT ITS LOWEST POINT SUCH THAT THE DIKE WILL
NOT IMPOUND WATER OR CCR MATERIAL. A SEPARATE NEW BERM WILL BE BUILT AROUND THE FUTURE
STORMWATER MANAGEMENT AREA FOR LONG TERM STORMWATER MANAGEMENT.
REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM
SHIFT OF -0.75 FEET WAS APPLIED).
2. EXISTING GRADES ARE BASED ON AERIAL TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
KEY MAP
660
650
640
630
620
610
600
590
580
570
560
0 0 0 0 0 0 1,-
0 0 0 0 0 0 "t
O N rn Ln Ln
EXISTING GRADE
(DIKE CREST)
CONCEPTUAL DAM BREACH GRADING
(SEE NOTE 1.3 IN GENERAL NOTES,
DRAWING NO. ALN_C999.001.012)
2 GROUNDWATER
:EFERENCE 4)
SECTION H-H'
NOT FOR CONSTRUCTION
TITLE
FINAL CLOSURE GRADING CROSS
SECTIONS VIII
)%=mcom ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR F-0342 ISSUED FOR APPROVAL
SEAL SCALE: AS SHOWN DES: NSF
0 15 30 45 ``��lhillll)J/�''' DUKE
DWG TYPE:.DWG DFTR: SVV
o
O�.•-��SS, `/% ENEK%107 I@ JOB N0: 60702384 CHKD: JDM
VERTICAL SCALE (IN FEET) �: SEAL q: y DATE: 07-27-2023 ENGR: JDM
043997 '�: = FILENAME: ALN C999,001,031 039 FINAL GRADING CROSS SECTIONS,DWG APPD: JDM
0 150 300 450 to _
N �FO<C� DWG SIZE DRAWING NO. REVISION
HORIZONTAL SCALE (IN FEET) ANSI D
7 Z' a 22.0"x34.0" q L N C 9 9 9 ■ 0 0 1. 0 3 9 2
r-
0
CD
0
N
INCHES
TENTHS 10
0
1

ALN C999.001 .040
Fm►. 2
TEXTURED 40-MIL
LLDPE GEOMEMBRANE
EXTEND GEOTEXTILE 3" MIN.
DOWN CONCRETE FACE
COMPACT MATERIAL
ADJACENT TO CONCRETE
16 OZ. NON -WOVEN
GEOTEXTILE
q_
CHANNEL
LOW POINT
STORMWATER CHANNEL SECTION -GRASS LINED
NOT TO SCALE
1. TO PROTECT AGAINST EROSION AND TO ESTABLISH VEGETATIVE STABILIZATION WITHIN THE CHANNEL, TRM (TURF
REINFORCEMENT MATTING) WILL BE USED. THE SPECIFIC PRODUCT WILL BE BASED ON THE ANTICIPATED SURFACE WATER
VELOCITY AND SHEAR STRESS REQUIREMENTS.
2. CHANNEL SECTIONS SHOULD INCLUDE A MINIMUM 2% GRADE TOWARD THE CENTERLINE OF THE CHANNEL.
3. SEE APPENDIX Cl FOR A SUMMARY OF PROPOSED CHANNEL ARMORING AND CHANNEL DIMENSIONS.
CL
CHANNEL
LOW POINT
2 STORMWATER CHANNEL SECTION - RIPRAP LINED
- NOT TO SCALE
NOTES:
1. CHANNEL SECTIONS SHOULD INCLUDE A MINIMUM 2% GRADE TOWARD THE CENTERLINE OF THE CHANNEL.
2. SEE APPENDIX Cl FOR A SUMMARY OF PROPOSED CHANNEL ARMORING AND CHANNEL DIMENSIONS.
STAINLESS STEEL BATTEN
3" MIN LLDPE GEOMEMBRANE TO BE EXTENDED
Ill /THROUGH BATTEN. NON -WOVEN GEOTEXTILE
TO BE TERMINATED PRIOR TO BATTEN.
D
D
0
0
0
D 'III
� �TLJJT� �
1" CHAMFER (TYP.) ALL
CONCRETE CORNERS IN
CONTACT WITH
GEOSYNTHETICS
MR
\\` APPLY CONTINUOUS
BEAD OF CAULK
. D NEOPRENE GASKET
8"(D X 34" STAINLESS
o D STEEL CINCH TYPE
ANCHOR BOLT AT 6"
ON CENTER
TOP OF CONCRETE
FOUNDATION/POURED SLAB
GEOCOMPOSITE —
FINAL COVER
SYSTEM TEXTURED 40-MIL
GEOSYNTHETICS LLDPE GEOMEMBRANE
GEOSYNTHETICS TO CONCRETE FOUNDATION CONNECTION (TYP.
NOT TO SCALE
NOTES:
1. IF A CONCRETE FOUNDATION DOES NOT EXIST AT
GRADE, A 6 INCH THICK CONCRETE PAD SHALL BE
POURED AT GRADE, EXTENDING A MINIMUM OF 1 FOOT
HORIZONTALLY IN ALL DIRECTIONS BEYOND THE
TOWER LEGS.
2. CONTRACTOR MAY SUBMIT FOR ENGINEER APPROVAL
ALTERNATE METHODS FOR ATTACHING CAP SYSTEM TO
TOWER LEGS.
VEGETATIVE COVER
6" TOPSOIL/AMENDED
COVER SOIL
TYPICAL FINAL COVER CAP SYSTEM
NOT TO SCALE
2'
24" CAP SYSTEM
COVER SOIL
GEOSYNTHETICS
5' MIN
2' MIN /' 3' MIN
I- - I
PROPOSED 2 FT. X 2 FT.
2' MIN ANCHOR TRENCH
3 TYPICAL CULVERT
NOT TO SCALE
i rL
ROADSIDE ROADSIDE
DITCH DITCH
CCR MATERIAL
7 TYPICAL ANCHOR TRENCH
031 NOT TO SCALE
4 TYPICAL HAUL / ACCESS ROAD
NOT TO SCALE
NOTES:
1. HAUL AND ACCESS ROAD TO BE FURTHER DESIGNED
PRIOR TO CONSTRUCTION BASED ON ADDITIONAL ANALYSES.
2. ROADSIDE DITCHES ARE NOT INCLUDED IN THE FINAL
GRADES PRESENTED IN THESE DRAWINGS.
GENERAL NOTES:
1. DETAILS 1 THROUGH 4 REPRESENT TYPICAL CLOSURE
DETAILS AND SHOULD NOT BE BUILT ON CCR MATERIALS.
2. DETAILS 5 THROUGH 7 APPLY TO LOCATIONS WHERE
BASES OF TRANSMISSION TOWERS WITHIN THE ASH
BASIN ARE FOUNDED ON OR SURROUNDED BY CCR
MATERIAL WHICH WILL BE LEFT IN PLACE AND CAPPED.
TITLE
NOT FOR CONSTRUCTION
FINAL CLOSURE GRADING DETAIL
P"=com ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
I N.C. ENGINEERING LICENSE NO. I FOR ISSUED FOR APPROVAL
F-0342
SEAL
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ANSI 22.0"x34.0" ALN C999.001.040 2
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el 041
625
�I\ \\� %)1-_'_'1 \I
TENTHS
Q
0
A c 11 I 0
0 300 600 900
GRAPHIC SCALE (IN FEET)
LEGEND
—625 PROPOSED MAJOR CONTOUR (25 FOOT)
620 PROPOSED MINOR CONTOUR (5 FOOT)
620 — EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
APPROXIMATE LIMITS OF IMPOUNDED ASH ------------------
ASH STORAGE BOUNDARY
100-YR 100 YR FLOOD LINE
PROPOSED UNPAVED ROADS
APPROXIMATE ASH BASIN WASTE BOUNDARY
JURISDICTIONAL STREAM
nInTP:C
1. TO IMPROVE CLARITY, ONLY 5-FOOT CONTOURS ARE SHOWN ON THIS
SHEET.
NOT FOR CONSTRUCTION
TITLE
ON
-SITE LANDFILL SCHEMATIC PLAN
- ASH BASINS
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
FOR
ISSUED FOR APPROVAL
F-0342
SEAL
fft
DUKE
SCALE: AS SHOWN
DES:
NSF
CAR ///r/
DWG TYPE:. DWG
DFTR:
SVV
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ENERGY®
JOB N0: 60702384
CHKD:
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AT
DE: 07-27-2023
ENGR:
JDM
c- 043997'`: =
FILENAME:
ALN_ C999 .001 .041 -045 ON -SITE LANDFILL SCHEMATIC,DWG
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
N��aQ
O
O�C�
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27 3
D
ALN C999.001 .041A
2
9
1
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ALN C999.001 .041 B
mv. 2
••
INCHES
N
TENTHS i0
0
77`-=�=J
MATCH LINE - SEE SHEET 041A
LAKE WYLIE/
CATAWBA RIVER
NORMAL W.S.E. 565.7 FT.
tWE
0 300 600 900
GRAPHIC SCALE (IN FEET)
6625
620
620 — —
100-YR
LEGEND
PROPOSED MAJOR CONTOUR (25 FOOT)
PROPOSED MINOR CONTOUR (5 FOOT)
EXISTING MAJOR CONTOUR (25 FOOT)
EXISTING MINOR CONTOUR (5 FOOT)
DUKE ENERGY PROPERTY BOUNDARY
100 YR FLOOD LINE
EXISTING ROADS
JURISDICTIONAL STREAM
NIOTP-q
1. TO IMPROVE CLARITY, ONLY 5-FOOT CONTOURS ARE SHOWN ON THIS
SHEET.
NOT FOR CONSTRUCTION
TITLE
ON -SITE LANDFILL SCHEMATIC PLAN
- LRB AND STATION "=com
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR F-0342 ISSUED FOR APPROVAL
SEAL DUKE
SCALE: AS SHOWN DES: NSF
`%%tiltslrr1f���''
•CqR ��DWG TYPE:. DWG DFTR: SVV
Ztig`�'i" ,� JOB NO: 60702384 CHKD: JDM
;� S y, _ �, ENERGY® DATE: 07 - 27 - 2023 ENGR : JDM
a EA L q : Y
`- D439,97 : = FILENAME: ALN_C999,001,041 045 ON SITE LANDFILL SCHEMATIC,DWG APPD: JDM
�?G/NSt�'* 4C�� DWG SIZE DRAWING NO. REVISION
o
47-
0� ANSI D
22.0"x34.0" ALN C 9 9 9. 0 01 . 0 41 B 2
9 10
1 1
r•
•

LEGEND
mv• 2
820
:es
780
760
740
720
700
.:f
..I
640
620
.9I
580
`016
0 O O O o 0 0 O O O O 0 O 0 O O O O O 0 O 0 0 0 0 0 0
0 0 0 o O O 0 O O 0 O o O O O O O O O O O O o O O O O
+ + + + + + + + + + + + + + + + + +
i j (o � 0+0 O N r� CO I� 00 O N N N N N N N
SECTION A -A'
820
M. mif
VA :•
760
740
720
700
.:e
..1
os
620
.1•
:•
560
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 N n Nd- Ln O r- 00 0) O N ro � Lr)
SECTION B-B'
INCHES 1 2 3 TENTHS 10 20 30
tXI51 IN(3 (7KAUt5
- - - - - - - - - - - - - HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
PROPOSED SOIL FILL
_ PROPOSED ASH FILL
Q4 2022 GROUNDWATER
FREE WATER PRIOR TO DECANTING
REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM SHIFT
OF -0.75 FEET WAS APPLIED).
2. THE EXISTING SURVEY INFORMATION (TOPOGRAPHY, PLANIMETRICS, ETC.) IS BASED ON A COMBINATION OF
THE TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015, MORGAN CORP IN NOVEMBER 2018,
STEWART INC IN JUNE 2020, AND GPI IN SEPTEMBER 2021.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
/
& -;11
.I I Y _ t
111 RUN
IV
xf
... ♦ 1 � � � � it l ���/
A'
041
NU I 1-UK GUNS I KUL I IUN
KEY MAP —ASH BASINS
TITLE
ON -SITE LANDFILL SCHEMATIC PLAN
- ABLF CROSS SECTIONS
AAECOM ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO. FOR F-0342 ISSUED FOR APPROVAL
SEAL SCALE: AS SHOWN DES: NSF
0 30 60 90 �-\\A
���1USllII)�/�' DUKE
CARO''
O O O O O O O O O O O O ' DWG TYPE:. DWG DFTR: SVV
` O ��SS ,�ENERGY® JOB N0: 60702384 CHKD: JDM
O O O O O O O O O O O O O . �
+ + + + + + + + + + + + VERTICAL SCALE (IN FEET) :� SEAL , y DATE: 07-27-2023 ENGR: JDM
co I- 00 000 N N-)`t Lo c0 r- -
N N 043997 -: = FILENAME: ALN C999,001,041 045 ON SITE LANDFILL SCHENIATIC,DWG APPD: JDM
0 150 300 450 (L 'tn
DWG SIZE DRAWING NO. REVISION
HORIZONTAL SCALE (IN FEET) ����`�� ANSI D 22.0"x34.0" ALN C999.001.042 2
5 6 7 8 9 10
0
N

LEGEND
mv• 2
760
NOTE: FINAL HEIGHT AND DETAILED DESIGN OF
LANDFILL MAY VARY FROM WHAT IS SHOWN HERE
740 AND WILL BE FURTHER OPTIMIZED AS A PART OF THE
RELEVANT CONSTRUCTION LEVEL DRAWINGS
720
I
700
I
EXISTING GRADE
680
CONCEPTUAL NSLF FOOTPRINT/GRADING
660 Q4 2022 GROUNDWATER (SEE NOTE 1.2 IN GENERAL NOTES,
� (SEE REFERENCE 4) DRAWING NO. ALN_C999.001.012)
640 '
HISTORICAL GRADE
620
600 -
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 N r0 "t L0 c0 00 O O N n Ln O r- 00 O O
SECTION C-Cl
760
NOTE: FINAL HEIGHT AND DETAILED DESIGN OF
LANDFILL MAY VARY FROM WHAT IS SHOWN HERE
AND WILL BE FURTHER OPTIMIZED AS A PART OF THE
740 RELEVANT CONSTRUCTION LEVEL DRAWINGS
720
700
i
EXISTING GRADE
680
CONCEPTUAL NSLF FOOTPRINT/GRADING
(SEE NOTE 1.2 IN GENERAL NOTES,
DRAWING NO. ALN C999.001.012)
660
-
640
__
-- ---- '—
620
�
HISTORICAL GRADE
Q4 2022 GROUNDWATER
(SEE REFERENCE 4)
I
600
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
N
r) ­t
u7 co r- 00 O O
7
N r2
u7 c0
(-
SECTION D-DI
INCHES 1 2 3
TENTHS 10 20
30
4
1
1
EXISTING GRADES
- - - - - - - - - - - - - HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
PROPOSED SOIL FILL
_ PROPOSED ASH FILL
Q4 2022 GROUNDWATER
7 FREE WATER PRIOR TO DECANTING
REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM SHIFT
OF -0.75 FEET WAS APPLIED).
2. THE EXISTING SURVEY INFORMATION (TOPOGRAPHY, PLANIMETRICS, ETC.) IS BASED ON A COMBINATION OF
THE TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015, MORGAN CORP IN NOVEMBER 2018,
STEWART INC IN JUNE 2020, AND GPI IN SEPTEMBER 2021.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
L
130RI
�r \
cl
040 1
i
ilk` 1 �i( � �' _ •�-� �` r \� ��i��
KEY MAP - ASH BASINS
N.C. ENGINEERING LICENSE NO.
F-0342
SEAL
0 30 60 90
�\ N .CAR
�eSs� �<.
VERTICAL SCALE (IN FEET) - : 4 SEAL y
:�
0 150 300 450 �� ,.�2 4309 7r
HORIZONTAL SCALE (IN FEET) 7-27 ;
3
um
NOT FOR CONSTRUCTION
TITLE
ON -SITE LANDFILL SCHEMATIC PLAN
- NSLF CROSS SECTIONS
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
FOR ISSUED FOR APPROVAL
SCALE: AS SHOWN DES: NSF
DUKEDWG TYPE:. DWG DFTR: SVV
JOB
E N F RkGY®[DATE.N0070 738 023 ENGR : J DM
FILENAME: ALN C999.001.041-045 ON -SITE LANDFILL SCHEMATICBG APPD: JDM
DWG SIZE DRAWING NO. REVISION
ANSI D
22.0"x34.0" ALN C999.001 .043 2
10
0
N
�r \
cl
040 1
i
ilk` 1 �i( � �' _ •�-� �` r \� ��i��
KEY MAP - ASH BASINS
N.C. ENGINEERING LICENSE NO.
F-0342
SEAL
0 30 60 90
�\ N .CAR
�eSs� �<.
VERTICAL SCALE (IN FEET) - : 4 SEAL y
:�
0 150 300 450 �� ,.�2 4309 7r
HORIZONTAL SCALE (IN FEET) 7-27 ;
3
um
NOT FOR CONSTRUCTION
TITLE
ON -SITE LANDFILL SCHEMATIC PLAN
- NSLF CROSS SECTIONS
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
FOR ISSUED FOR APPROVAL
SCALE: AS SHOWN DES: NSF
DUKEDWG TYPE:. DWG DFTR: SVV
JOB
E N F RkGY®[DATE.N0070 738 023 ENGR : J DM
FILENAME: ALN C999.001.041-045 ON -SITE LANDFILL SCHEMATICBG APPD: JDM
DWG SIZE DRAWING NO. REVISION
ANSI D
22.0"x34.0" ALN C999.001 .043 2
10
0
N

LEGEND
EXISTING GRADES
mv• 2
INCHES
ENTHS 10
HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
PROPOSED SOIL FILL
_ PROPOSED ASH FILL
740
Q4 2022 GROUNDWATER
NOTE: FINAL HEIGHT AND DETAILED DESIGN OF
LANDFILL MAY VARY FROM WHAT IS SHOWN HERE
AND WILL BE FURTHER OPTIMIZED AS A PART OF
— FREE WATER PRIOR TO DECANTING
720 THE RELEVANT CONSTRUCTION LEVEL DRAWINGS
-
REFERENCES
700 -
.:•
CONCEPTUAL SSLF FOOTPRINT/GRADING
(SEE NOTE 1.2 IN GENERAL NOTES,
DRAWING NO. ALN_C999.001.012)
-0
640 \
EXISTING GRADE
620 =-
I
600 Q4 2022 GROUNDWATER
(SEE REFERENCE 4)
580 -
560 - -
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 N r7 t u7 co � 00 O O N r7 ­t
SECTION E-E'
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM SHIFT
OF -0.75 FEET WAS APPLIED).
2. THE EXISTING SURVEY INFORMATION (TOPOGRAPHY, PLANIMETRICS, ETC.) IS BASED ON A COMBINATION OF
THE TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015, MORGAN CORP IN NOVEMBER 2018,
STEWART INC IN JUNE 2020, AND GPI IN SEPTEMBER 2021.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE BASED ON GROUNDWATER MONITORING READINGS FROM
NOVEMBER 2022 AND HAVE BEEN PROVIDED BY SYNTERRA. THESE CONTOURS DO NOT REFLECT THE
ANTICIPATED FUTURE CONDITIONS AFTER ASH HAS BEEN REMOVED IN THE ASH BASINS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
L
r/
740
NOTE: FINAL HEIGHT AND DETAILED DESIGN OF
LANDFILL MAY VARY FROM WHAT IS SHOWN HERE AND
WILL BE FURTHER OPTIMIZED AS A PART OF THE
720 RELEVANT CONSTRUCTION LEVEL DRAWINGS
700
680
EXISTING GRADE
CONCEPTUAL SSLF FOOTPRINT/GRADING
660 (SEE NOTE 1.2 IN GENERAL NOTES,
DRAWING NO. ALN_C999.001.012)
640
620
I I I ��-
600 HISTORICAL GRADE
Q4 2022 GROUNDWATER
580 (SEE REFERENCE 4)
560
O O O O O O O O O O O O O
+ + + + + + + + + + + + +
O N r7 �t Lo 00 O N
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NOT FOR CONSTRUCTION
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TITLE
ON -SITE LANDFILL SCHEMATIC PLAN
)%=
- SSLF CROSS SECTIONS mcom
ALLEN STEAM STATION
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS - CBE
GASTON COUNTY, NORTH CAROLINA
N.C. ENGINEERING LICENSE NO.
F-0342
SEAL
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DWG TYPE:.DWG DFTR: SVV
JOB NO:60702384 CHKD: JDM
ENFnfY® DATE: 07 27 2023 ENGR: JDM
FILENAME: ALN C999.001.041-045 ON -SITE LANDFILL SCHEMATICBG APPD: JDM
DWG SIZE DRAWING NO. REVISION
ANSI D
22.0"x34.0" ALN C999.001 .044 2
1) 10
1

INCHES
m
760
740
720
700
.:m
..•
640
620
m
580
NOTE: FINAL HEIGHT AND DETAILED DESIGN OF LANDFILL
MAY VARY FROM WHAT IS SHOWN HERE AND WILL BE
FI IRTHFR C)PTINA17Fn A.q A PART nF THE RFI FVANIT
CONSTRUCTION LEVEL DRAWINGS
CONCEPTUAL CLF FOOTPRINT/GRADING
(SEE NOTE 1.2 IN GENERAL NOTES,
DRAWING NO. ALN_C999.001.012)
LRB NORMAL W.S.E. 614.7 FT
BOTTOM OF LRB — — —
ESTIMATED LONG TERM SEASONAL HIGH GROUNDWATER
(SEE REFERENCE 4)
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 N r7 "t ff� c0 � 00 m O a0 O O
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SECTION G-G'
NOTE: FINAL HEIGHT AND DETAILED DESIGN OF LANDFILL
MAY VARY FROM WHAT IS SHOWN HERE AND WILL BE
FURTHER OPTIMIZED AS A PART OF THE RELEVANT
800 CONSTRUCTION LEVEL DRAWINGS
780
760
740
CONCEPTUAL CLF FOOTPRINT/GRADING
720 (SEE NOTE 1.2 IN GENERAL NOTES,
DRAWING NO. ALN_C999.001.012)
i
700 ,
680
660
LRB NORMAL W.S.E. 614.7 FT
640
620
BOTTOM OF LRB
600
ESTIMATED LONG TERM SEASONAL HIGH GROUNDWATER
(SEE REFERENCE 4)
580
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+ + N r+ �f c+0 r- co co
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TENTHS
■--------------------- ---------
r 20 r
SECTION H-HI
ALN C999.001 .045
LEGEND
EXISTING GRADES
- - - - - - - - - - - - - HISTORICAL GRADE (BOTTOM OF CCR MATERIAL)
PROPOSED FINAL GRADES
PROPOSED SOIL FILL
PROPOSED ASH FILL
ESTIMATED GROUNDWATER
FREE WATER PRIOR TO DECANTING
REFERENCES
1. HISTORICAL GRADES WERE DIGITIZED BY AMEC FOSTER WHEELER AS PART OF THE WASTE STRATEGY
ANALYSIS REPORT DATED APRIL 2015. VERTICAL DATUM CONVERTED FROM NGVD29 TO NAVD88 (DATUM SHIFT
OF -0.75 FEET WAS APPLIED).
2. THE EXISTING SURVEY INFORMATION (TOPOGRAPHY, PLANIMETRICS, ETC.) IS BASED ON A COMBINATION OF
THE TOPOGRAPHIC SURVEY PERFORMED BY WSP IN FEBRUARY 2015, MORGAN CORP IN NOVEMBER 2018,
STEWART INC IN JUNE 2020, AND GPI IN SEPTEMBER 2021.
3. THE ASH BASIN EXTENTS PRESENTED IN THIS DRAWING ARE BASED ON THE "COMPREHENSIVE SITE
ASSESSMENT REPORT - ALLEN STEAM STATION ASH BASIN," PREPARED BY HDR FOR DUKE ENERGY AND
SUBMITTED TO NCDEQ (NPDES PERMIT NO. NC0004979) ON AUGUST 23, 2015.
4. GROUNDWATER ELEVATIONS SHOWN ARE ESTIMATED BY AECOM AND ARE UNDERGOING MONITORING AND
DEVELOPMENT AT THE TIME OF THE CREATION OF THESE PLANS.
5. TRANSMISSION LINES SAG ELEVATIONS PROVIDED BY DUKE ENERGY AND SHALL HAVE THE FOLLOWING
VERTICAL CLEARANCE FROM GROUND TO THE LOWEST SAG ELEVATION:
100 KV
22 FT.
230 KV
24.5 FT.
500 KV
30.5 FT.
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0 30 60 90
VERTICAL SCALE (IN FEET)
0 150 300 450
HORIZONTAL SCALE (IN FEET)
N.C. ENGINEERING LICENSE NO.
F-0342
��1US l! I11j��
:a AL q y
c- 043997
7-2) 3
REv• 2
NOT FOR CONSTRUCTION
TITLE
ON -SITE LANDFILL SCHEMATIC PLAN
- CLF CROSS SECTIONS
ALLEN STEAM STATION
CCR SURFACE
IMPOUNDMENT CLOSURE PLAN DRAWINGS -
CBE
GASTON COUNTY, NORTH CAROLINA
FOR
ISSUED FOR APPROVAL
DUKE
SCALE: AS SHOWN
DES:
NSF
DWG TYPE:. DWG
DFTR:
SVV
ENERGY®
JOB : 60702384
CHKD:
JDM
DATENO 07-27-2023
ENGR:
JDM
FILENAME:
ALN C999.001.041-045 ON -SITE LANDFILL SCHEMATIC.M
APPD:
JDM
DWG SIZE
DRAWING NO.
REVISION
ANSI
22.0"x34.0"
ALN C999.001.045
2
10
0
N