Roxboro WAB - CBE - Appendix D_20200107

Wood Environment & Infrastructure Solutions, Inc.
Duke Energy —Roxboro Plant wood.
WAB Coal Combustion Residuals Surface Impoundment Closure Plan (Excavation)
APPENDIX D: CLOSURE PLAN DRAWINGS

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ROX C901- 039.001
REV. 0
DUKE ENERGY
A
ROXBORO STEAM ELECTRIC PLANT
A
COAL COMBUSTION RESIDUALS SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS
WEST ASH BASIN CLOSURE BY EXCAVATION
B
PERSON COUNTY, NORTH CAROLINA
B
ASH BASIN DAM STATE ID: PERSO-038 & PERSO-039, NPDES PERMIT #: NC0003425
IDECEMBER 18,2019
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Ringgold r il SHEET NO. SHEET TITLE
C ROX C901.039.001 COVER SHEET R• `•R•
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ROX_C901.039.002 GENERAL NOTES
, IRCINI,
--hbllol NolitTFI C^I(ot IN ROX C901.039.003 OVERALL SITE EXISTING CONDITIONS
131 ch J AERIAL HEATEDWATER_
5emnr,.HYCO DISCHARGE
ROX_C901.039.004 EXISTING CONDITIONS PLAN RESERVOIR POND
U* y'
-°� ROX C901.039.005 SUBSURFACE EXPLORATION LOCATION -
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PLAN �''` ,-
STEAM
ROXBORO ELECTRIC PLANT ROX_C901.039.006 ESTIMATED BOTTOM OF ASH CONTOUR MAP
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CONTACT INFORMATION
Yn«,Ila -I v'T� ROX C901.039.007 DEMOLITION PLAN L w,7+.Mirp —
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OWNER: DUKE ENERGY PROGRESS, LLC
ROX_C901.039.008 FINAL ASH GRADES PLAN
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ADDRESS: 401 SOUTH WILMINGTON ST.
:s ROX_C901.039.009 FINAL SURFACE WATER MANAGEMENT PLANWEST
RALEIGH, NC27601
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XA ROX C901.039.010 PROFILE & CROSS -SECTIONS :° - CONTACT: RANDY HART
ROX C901.039.011 CROSS -SECTIONS " °`"' } }1eIMPOUNDMENT AREA OF
PHONE: [phone]
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SITE LOCATION MAP - 111 = 5 MILES SITE VICINITY MAP - 1 If = 20001 LAT: 36.487388 N ENGINEERING FIRM: wood.
LONG:-79.074992 W
MAP SOURCE: ESRI WORLD TOPOGRAPHIC BASEMAP MAP SOURCE: ESRI WORLD TOPOGRAPHIC BASEMAP ADDRESS: 4021 STIRRUP CREEK DRIVE
DURHAM, NC 27703
ENGINEER OF RECORD: CHRISTOPHER KEENAN
PHONE: [phone]
EMAIL: [e-mail]
TITLE
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS
wood WEST ASH BASIN CLOSURE BY EXCAVATION
F
F
ROXBORO STEAM ELECTRIC PLANT
Environment &Infrastructure Solutions
4021 STIRRUP CREEK DRIVE, SUITE 100 PERSON COUNTY, NORTH CAROLINA
DURHAM NC203 COVER SHEET
TEL: [phone]
FAX: [phone]
LICENSURE: FOR
F-1253
NC GEOLOGY: C-247 ISSUED FOR REVIEW
SEAL SCALE: AS SHOWN DES: JL
DFTR
DUKE
DWG TYPE: DWG SM
JOB O CHKD: AP
ENERGY®
DATE: 12/18/20196 ENGR: SA
NOT FOR
CONSTRUCTION FILENAME: ROX_C901.039.001B.dwg APPD: CK
DWG SIZE DRAWING NO. REVISION
ANSID ROX C901.039.001 0
0 12/18/2019 7812190186 DESIGN PLAN JL SM AP SA CK ISSUED FOR REVIEW 22'�X34`�
REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD DESCRIPTION
TENTHS 10 20 30 4 5 6 7 8 9 10
INCHES 1 2 3
Nlotted by:Markham, Steven Sheet Set: /b-121yU-Ibb — Noxboro LAMA (Ulosure F'lans Layout:GUVLN 5HLL1 Uecember -1 /, 2U-ly Ub:51:ULam Q: \Uuke Lnergy\Noxboro\/tilLI'JU-Ibb — UAMA Ulosure Flan\Issued for Permitting\NevU\sheets\NUX_(UIJU-I.U,9y.UU-1b.dwg

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ROX C901.039.002
REV.0
REFERENCES:
WSP SURVEY GENERAL NOTES:
1.
ASH BASIN APPROXIMATE LIMIT OF WASTE PRESENTED IN THIS
1. BASIS OF BEARINGS: NC GRID NAD83/2011
DRAWING WERE PREPARED BY SYNTERRA FOR DUKE ENERGY.
2. ELEVATIONS ARE BASED ON NAVD88
2.
APPROXIMATE BOTTOM OF ASH CONTOURS TAKEN FROM
WOOD ENVIRONMENT AND INFRASTRUCTURE SOLUTIONS,
A
WASTE STRATEGY ANALYSIS, ROXBORO STEAM STATION,
A
MARCH 25, 2015.
3.
EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM
PHOTOGRAMMETRIC METHODS FROM APRIL 16, 2014 AERIAL
PHOTOGRAPHY OBTAINED FROM WSP.
4.
PRE -DECANTING MODELED GROUNDWATER SURFACE
REPRESENTS SIMULATED STEADY-STATE GROUNDWATER
HYDRAULIC HEADS IN THE TRANSITION ZONE OR SAPROLITE
FROM THE 2018 SYNTERRA GROUNDWATER MODEL. THIS
FLOW MODEL WAS CALIBRATED TO TIME -AVERAGED
HYDRAULIC HEADS MEASURED IN MONITORING WELLS PRIOR
TO THE START OF DECANTING.
5.
THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP
CREATION. THIS MAP IS A PRELIMNARY JURISDICTIONAL
DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND
STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER
WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL
B
RESOURCE TECHNICAL REPORT FOR ROXBORO STEAM
B
ELECTRIC PLANT DATED JUNE 2015.
SURFACE WATER MANAGEMENT NOTES:
DAM DECOMMISSIONING NOTES:
1.
AFTER COMPLETION OF EXCAVATION, THE CLOSURE AREA WILL
THE WAB MAIN DAM AND DIKE NO. 1 WILL BE DECOMMISSIONED UNDER A
GENERALLY BE RESTORED TO THE ORIGINAL (NATURAL) GRADES
SEPARATE PERMITTING PROCESS AT A TIME WHEN THEY ARE NO LONGER
PRESENT BEFORE CONSTRUCTION OF THE WEST ASH BASIN (WAB)
REQUIRED FOR PLANT OPERATIONS.
MAIN DAM. THE CLOSURE AREA WILL BE STABILIZED WITH
VEGETATION.
2. THE WAB MAIN DAM CREST LEVEL WILL BE LOWERED AND THE
EMBANKMENT WILL BE BREACHED. WAB DIKE NO. 1 WILL BE
C
COMPLETELY REMOVED AS REQUIRED FOR DAM DECOMMISSIONING.
C
3. AFTER THE WAB MAIN DAM IS BREACHED, STANDING WATER WILL BE
PRESENT WITHIN THE BASIN AREA AT A WATER LEVEL ELEVATION
CONTROLLED BY DOWNSTREAM HYCO RESERVOIR.
4. AFTER REMOVAL OF WAB DIKE NO. 1, SURFACE WATER FLOW FROM
SARGENTS CREEK WILL BE DIRECTED INTO THE WAB CONSISTENT
WITH THE ORIGINAL (NATURAL) FLOW PATH. THE CONTRIBUTION OF
SURFACE WATER FLOW FROM THE DRAINAGE AREA UPSTREAM FROM
WAB DIKE NO. 1 IS CONSIDERED IN THE POST -CLOSURE STORM WATER
O
DESIGN ANALYSIS.
X
5. SURFACE WATER RUNOFF INTO THE WAB WILL INCLUDE INFLOW FROM
I
THE EAST ASH BASIN (EAB) THAT PASSES THROUGH THE 10-FOOT
DIAMETER CULVERT UNDER DUNNAWAY ROAD.
6. DURING CLOSURE OF THE EAB, SURFACE WATER FLOW THAT HAS BEEN
O
D
IN CONTACT WITH ASH WILL BE DIRECTED THROUGH THE CULVERT
INTO THE WAB FOR TREATMENT PURPOSES.
O
7. AFTER EAB CLOSURE COMPLETION (INCLUDING ESTABLISHMENT OF
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PERMANENT VEGETATIVE COVER), ALL EAB SURFACE WATER PASSING
C�
THROUGH THE CULVERT WILL BE CONSIDERED AS NON -CONTACT
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WATER AND WILL NOT REQUIRE FURTHER TREATMENT.
O
8. DURING WAB CLOSURE, THE NON -CONTACT EAB SURFACE WATER
fV
PASSING THROUGH THE CULVERT WILL BE TEMPORARILY DISCHARGED
INTO THE HEATED WATER DISCHARGE POND.
9. AFTER WAB CLOSURE COMPLETION (INCLUDING ESTABLISHMENT OF
PERMANENT VEGETATIVE COVER), THE NON -CONTACT EAB SURFACE
WATER PASSING THROUGH THE CULVERT CAN BE DISCHARGED INTO
m
THE WAB.
0
10.
AFTER WAB CLOSURE COMPLETION (INCLUDING ESTABLISHMENT OF
E
PERMANENT VEGETATIVE COVER), ALL SURFACE WATER RUNOFF
FROM THE CLOSURE AREA CAN BE DESIGNATED AS NON -CONTACT AND
WILL NOT REQUIRE TREATMENT BEFORE BEING DISCHARGED.
11.SURFACE
WATER WILL BE DISCHARGED THROUGH THE WAB MAIN DAM
(DECOMMISSIONED AS INDICATED IN NOTE 2) INTO THE HEATED WATER
DISCHARGE POND, WHICH IS PART OF THE WASTEWATER TREATMENT
SYSTEM UNDER THE EXISTING NPDES PERMIT. THE HEATED WATER
DISCHARGE POND ULTIMATELY DISCHARGES TO HYCO RESERVOIR
THROUGH NPDES OUTFALL 003.
TITLE
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS
wood
WEST ASH BASIN CLOSURE BY EXCAVATION
ROXBORO STEAM ELECTRIC PLANT
F
Environment &Infrastructure Solutions
F
4021 STIRRUP CREEK DRIVE, SUITE 100
PERSON COUNTY, NORTH CAROLINA
DURHAMNC20
GENERAL NOTES
TEL: [phone]
FAX: [phone]
LICENSURE:
FOR
F-1253
ISSUED FOR REVIEW
NC GEOLOGY: C-247
SEAL
SCALE: AS SHOWN DES:
DFTR
DUKE
JL
DWG TYPE: DWG
SM
JOB O CHKD-.
VENERGY®
AP
NOT FOR
DATE: 12/18/20196 ENGR:
SA
CONSTRUCTION
FILENAME: ROX_C901.039.002B.dwg APPD:
CK
DWG SIZE DRAWING NO. REVISION
12/18/2019 DESIGN PLAN JL SM AP SA CK ISSUED FOR REVIEW
ANSI ROX C901.039.002
0
0 7812190186
22'�X34��
REV DATE I JOB NO. PROJECT TYPE I DES DFTR I CHKD ENGR I APPD DESCRIPTION
TENTHS 10 20
30 4
5 6 7
8
9 10
INCHES 1 2 3
Plotted By: Markham, Steven Sheet Set: 7812190186 — Roxboro CAMA Closure Plans Layout: GENERAL NOTES December 17, 2019 08: 51: 09am Q: \Duke Energ y\Roxboro\7812190186 — CAMA Closure Plan\Issued for Perm itting\RevO\sheets\ROX_C901.039.002B.dwg

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ROX C901-039.003B
REV. 0
INTAKE BAY
INTAKE CANAL
(WOTUS)
(WOTUS) r
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SUBSTATION
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EAST ASH BASIN MAIN DAMto
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SEPARATOR BERM
EAST ASH BASIN
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DISCHARGE OUTLETS
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f
WEST ASH BASIN
(2) 30"RCP PIPES
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IMPOUNDMENT
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DIKE \��1�
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APPROXIMATE LIMIT OF
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------APPROXIMATE ASH BASIN LIMIT OF WASTE
— UNLINED PORTION OF INDUSTRIAL LANDFILL
�
WEST ASH BA SIN
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LINED PORTION OF INDUSTRIAL LANDFILL
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— — — — — — — — PERMITTED LCID LANDFILL LIMIT
W
A,
DIKE 4
� AREA A CLOSURE EVENT 1 LIMIT
DISCHARGE CANAL
70
m
-DISCHARGE
SOUTHERN EXTENSION
REFERENCES
o
' DIKE 1
IMPOUNDMENT AREA OF
1. ASH BASIN APPROXIMATE LIMIT OF WASTE PRESENTED IN THIS
E
(FILTER DIKE)
r
j
THE WEST ASH BASIN
DRAWING WERE PREPARED BY SYNTERRA FOR DUKE ENERGY.
WESTERN DISCHARGE
CANAL
500 0 500 1000 FT
OUTLET
STRUCTURES
wood.
TICCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS
WEST ASH BASIN CLOSURE BY EXCAVATION
r`
ROXBORO STEAM ELECTRIC PLANT
F
Environment & Infrastructure Solutions
4021STIRRUPCREEKDRIVE,SUITE100
PERSON COUNTY, NORTH CAROLINA
TEL: [phone]
OVERALL SITE EXISTING CONDITIONS - AERIAL
I
FAX: [phone]
LICENSURE:
FOR
NC ENG: F-1253ISSUED
NC GEOLOGY: C-247
FOR REVIEW
SEAL
SCALE: AS SHOWN DES: IL
DFTR
ft� DUKE
DWG TYPE: DWG SM
ENERGY® JOB NO: 7812190186 CHKD: AP
NOT FOR
DATE: 12/18/2019 ENGR: SA
CONSTRUCTION
FILENAME: ROX—C901.039.003B.dwg APPD: CK
DWG SIZE DRAWING NO. REVISION
12/18/2019 DESIGN PLAN JL SM AP SA CK ISSUED FOR REVIEW
ANSID ROX C901.039.003 0
0 7812190186
22"x34"
REV DATE I JOB NO. PROJECT TYPE I DES DFTR I CHKD ENGR I APPD DESCRIPTION
—
TENTHS 10 20 30
4 5
6 7
8
9 10
INCHES 1 2 3
Plotted By: Markham, Steven Sheet Set: 7812190186 — Roxboro CAMA Closure Plans Layout: OVERALL SITE EXISTING CONDITIONS — AERIAL December 17, 2019 08: 51: 26am Q:\Duke Energy\Roxboro\7812190186 — CAMA Closure Plan\Issued for Perm itting\RevO\sheets\ROX_C901.039.003B.dwg

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ROX C901.039.004
REV.0
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QUANTITIES TABLE
DESCRIPTION
APPROXIMATE AMOUNT
LAMA LIMIT OF WASTE AREA
225 ACRES
CAMA LIMIT OF WASTE ASH VOLUME
10,811,667 CY
---EL
EXISTING MINOR CONTOURS
APPROXIMATE ASH BASIN LIMIT OF WASTE
410 ESTIMATED BOTTOM OF ASH 10' CONTOURS
�j � AREA TO BE EXCAVATED
j/ j NOTES:
, � 1. BOTTOM OF ASH CONTOURS ARE BASED ON HISTORIC TOPOGRAPHY AND ARE
I/ FROM A DIFFERENT SOURCE THAN THE LIMIT OF WASTE LINE; THEREFORE, THEIR
j//j EXTENTS MAY DIFFER.
i %� REFERENCES:
I//%- 1. ASH BASIN APPROXIMATE LIMIT OF WASTE PRESENTED IN THIS DRAWING WERE
//� PREPARED BY SYNTERRA FOR DUKE ENERGY.
/// / 2. APPROXIMATE BOTTOM OF ASH CONTOURS TAKEN FROM WOOD ENVIRONMENT
�/� AND INFRASTRUCTURE SOLUTIONS, WASTE STRATEGY ANALYSIS, ROXBORO
/� / STEAM STATION, MARCH 25, 2015.
/ / % 3. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM
/`/� j PHOTOGRAMMETRIC METHODS FROM APRIL 16, 2014 AERIAL PHOTOGRAPHY
/��/ OBTAINED FROM WSP.
�/ �j/ 250 0 250 500 FT
�, /
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— — LEGEND
EXISTING & RE
SIDUAL MAJOR CONTOURS
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o\ �� APPROXIMATE ASH BASIN LIMIT OF WASTE
,ACCESS ROADP. o A. \
- IA//
1'100
ff REFERENCES:
1. ASH BASIN APPROXIMATE LIMIT OF WASTE PRESENTED IN THIS DRAWING WERE PREPARED
iI o
��/� I/ too
♦\\\\\ \ \\\ I 1 I I \ mil// � �� \ \ J \ BY SYNTERRA FOR DUKE ENERGY.
2. APPROXIMATE BOTTOM OF ASH CONTOURS TAKEN FROM WOOD ENVIRONMENT AND
✓� /�\ > I I �� INFRASTRUCTURE SOLUTIONS, WASTE STRATEGY ANALYSIS, ROXBORO STEAM STATION,
�l I r /l ) ✓ MARCH 25, 2015.
,� 3. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC
METHODS FROM APRIL 16, 2014 AERIAL PHOTOGRAPHY OBTAINED FROM WSP.
�
1,,->> \��\ \ `i�/ l 1 I \ ►Illlll \ \ \\\\\\ \\\ / 1I ) 1 1 /J � ////i
\ \ \\\� \ �'/\ I \ \\\� \�\\\� \ �♦ o /i �� ��I I I I \ // // ( �/ l 1 �� ��I
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IN\� / ��.° ^� \ 1 I I II \� \\�,� J \ `\ \II,11� ��imp
�\ �\ \\ \ \ '° / \ /'�i / /%�/^ I \ f 250 0 250 500 FT
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\\ \I III 1 I I �/\� \/ \��/ ����5 �� / \\\ �// / I TITLE
R'o ° \\\ // / /� `' ( 7 ) \ \ �� �- / l CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS
WESTERN DISCHARGE CANAL o I j���_� \� \ �'�\\ ems°�� \\ // / \ Wood
•
11010 s I II`��-/// __f WEST ASH BASIN CLOSURE BY EXCAVATION
L / �\ / -� \ q�A� . �,� \ \ \ /�--� I J / Environment& Infrastructure Solutions ROXBORO STEAM ELECTRIC PLANT
/ \ — / / ( / s \ /�/-_�� l /\\\�� \l \ ° °\ 1/(�� \� \ \ 1 I PERSON COUNTY NORTH CAROLINA
F J j � \ / I � � � � / 1s � \ I I / / / / /� \ \ ( ✓ \ / \ \ � , �j// 1\ \ 4021 STIRRUP CREEK DRIVE, SUITE 100 �
/ I I �� r 1 //� / // f//// ✓ \ 1 1 \\\ �� J \ � \t\ I \ / DURHAM NC 27703
_� Cam_\�\ \�\_ -- _ = \ \ \ — TEL:[phone] FINAL ASH GRADES PLAN
-\ \ \ � �\ // \ \ � � FAX: [phone]
s\x'\LICEN
t�/�
\ _ \\ \� \\ \ \ \\ NC ENGSFR1253 FOR
s10 NCGEOLOGY: C247 ISSUED FOR REVIEW
SEAL \ \. SCALE• AS SHOWN DES• JL
QUANTITIES TABLE
DESCRIPTION
APPROXIMATE AMOUNT
CAMA LIMIT OF WASTE AREA
225 ACRES
CAMA LIMIT OF WASTE ASH VOLUME
10,811,667 CY
ASH FILL VOLUME
0 CY
SOIL FILL VOLUME
0 CY
\\ \ �� 20 / / �/\\ 1/ / i �/ DUKE DWG TYPE: DWG DFTR VD
\ \\\ JOB NO: 7812190186 CHKD: AP
ENERGY® DATE: 12/18/2019 ENGR: SA
NOT FOR
CONSTRUCTION FILENAME: ROX_C901.039.010B.dwg APPD: CK
\ 7 DWG SIZE DRAWING NO. REVISION
0 12/18/2019 7812190186 DESIGN PLAN JL SM AP SA CK ISSUED FOR REVIEW 22'X34D" ROX C901.039.008 0
REV DATE JOB NO. PROJECT TYPE DES I DFTR I CHKD I ENGR APPD DESCRIPTION
70
m
0
F
INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7 8 9 10
I 1 1 1 1 1 1
Plotted By: Markham, Steven Sheet Set: 7812190186 - Roxboro CAMA Closure Plans Layout: FINAL ASH GRADES PLAN December 17, 2019 08: 54: 01 am Q:\Duke Energy\Roxboro\7812190186 - CAMA Closure Plan\Issued for Perm itting\RevO\sheets\ROX-C901.039.01OB. dwg

2 3 4 5 6 7 8
ROX C901- 039.009
REV. 0
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1. ASH BASIN APPROXIMATE LIMIT OF WASTE PRESENTED IN THIS DRAWING WERE PREPARED
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ROXC901.039.011C.dwg APPD:FILENAME: CKCONSTRUCTION DWG SIZE DRAWING NO. REVISION'
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ANSI D
0 12/18/2019 7812190186 DESIGN PLAN JL SM AP SA CK ISSUED FOR REVIEW 22°X34° ROX_C901.039.009 0
REV DATE JOB NO. PROJECT TYPE DES I DFTR CHKD ENGR APPD DESCRIPTION
4 5 6 7 8 9 10
TENTHS 10 20 30
INCHES 1 2 3
Plotted By: Markham, Steven Sheet Set: 7812190186 — Roxboro CAMA Closure Plans Layout: FINAL SURFACE WATER MANAGEMENT PLAN December 17, 2019 08: 55: 27am Q: \Duke Energy\Roxboro\7812190186 — CAMA Closure Plan\Issued for Perm itting\RevO\sheets\ROX_C901.039.011 C.dwg

2 3 4 5 6 7 8
I I I I I I I
-F�
520.00
500.00
460.00
171 LL
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440.00
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360.00
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r �
\ / \ EXISTING GRADE
EXISTING
- -
- _ _ _ _ _ _ _ _ _ _ _/ \� - _ / \ PRE -DECANTING
- J \ MODELED
WEST ASH BASIN MAIN DAM
/
GROUNDWATER
CREST DESIGN EL. 470'
SURFACE
(TO BE REMOVED) /
/
\ EXISTING
WEST ASH BASIN DIKE NO. 1
CREST EL. 473'
/ \
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(TO BE REMOVED)
W(E) GW(E) GW(E) GW(E) GW(E) GW(a J \ GHK G E) - - - - - - - - - - GW(E) - - - - - - - - - - - - - - - GW(E) GW(E) GW(E G E) GW(E) GW(E)
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-----GW(E -----------
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100 YEAR FLOOD
RESERVOIR ELEVATION 413'
REMOVE DAM
NORMAL RESERVOIR ELEVATION
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=/zz
TIE INTO ORIGINAL
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ZVI zz'
RESIDUAL SOIL GRADE (BOTTOM OF ASH)
CREEK BED
0+00 2+00 4+00 6+00 8+00
/
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MODELED
GROUNDWATER
REV. 0
520.00
500.00
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10+00 12+00 14+00 16+00 18+00 20+00 22+00 24+00 26+00 28+00 30+00 32+00 34+00 36+00 38+00 40+00 42+00 44+00 46+00 48+00 50+00 52+00 54+00 56+00
PROFILE A
HORIZONTAL SCALE: 1 "=200'
VERTICAL SCALE: 1 "=20'
EXISTING GRADE
GW(j),r �W ) GW(E) G� (E) 1GW(E) GW(E)
wf�
SURFACE G*E` GM�(E) (E)
GW(E) -------- GW(E
/ GW(�E) 7
1
0+00 2+00 4+00 6+00 8+00 10+00
NOTES:
1. PRE -DECANTING MODELED GROUNDWATER SURFACE:
1.1. SIMULATED STEADY-STATE GROUNDWATER HYDRAULIC HEADS IN THE TRANSITION ZONE OR
SAPROLITE FROM THE 2019 SYNTERRA GROUNDWATER MODEL. THIS FLOW MODEL WAS
CALIBRATED TO TIME -AVERAGED HYDRAULIC HEADS MEASURED IN MONITORING WELLS PRIOR
TO THE START OF DECANTING.
INCHES 1 2 3 [TIEHSNT 10 20 30
100 YEAR FLOOD
RESERVOIR ELEVATION 413'
NORMAL RESERVOIR ELEVATION
410.5' /
RESIDUAL SOIL GRADE (BOTTOM OF ASH)
520.00
:1 11
500
460.00 440.00
H
LL
Z
440.00 420.00
Q
>
W
J
W
420.00 400.00
380.00
-2+00
G:1 11
' 360.00
12+00 14+00 16+00 18+00 20+00 22+00 24+00 26+00 28+00 30+00
SECTION B
HORIZONTAL SCALE: 1 "=200'
VERTICAL SCALE: 1 "=20'
EXISTING GRADE
PRE -DECANTING
\ MODELED
\ GROUNDWATER
\ SURFACE
G - - - GW(E)
-'7- - - -
RESIDUAL SOIL GRADE
(BOTTOM OF ASH)
0 12/18/2019 7812190186 DESIGN PLAN JL SM AP SA CK
REVI DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD
0+00 2+00 4+00 6+00
SECTION C
HORIZONTAL SCALE: 1 "=200'
VERTICAL SCALE: 1 "=20'
I f
1 r
SITE VICINITY
SCALE: 1 "=2000'
ISSUED FOR REVIEW
DESCRIPTION
100 YEAR FLOOD
RESERVOIR ELEVATION 413'
NORMAL RESERVOIR ELEVATION
410.5'
500.00
LEGEND
O
X
- - - - -
- - EXISTING GRADE
480.00
I
-
RESIDUAL SOIL GRADE (BOTTOM OF ASH)
^
RESERVOIR ELEVATION
O
100 YEAR FLOOD ELEVATION
�60.00
FEATURE TO BE REMOVED
O
171 GW(E)
PRE -DECANTING MODELED GROUNDWATER
SURFACE
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440.00
0
p
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60'
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420.00
m
0
40'
20'
380.00
8+00 10+00 12+00 0 200' 400' 600'
0
TITLE
WOOCCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS
• WEST ASH BASIN CLOSURE BY EXCAVATION
Environment &Infrastructure Solutions ROXBORO STEAM ELECTRIC PLANT
4021 STIRRUP CREEK DRIVE, SUITE 100 PERSON COUNTY, NORTH CAROLINA
DURHAM NC 27703 PROFILE & CROSS -SECTIONS
TEL: [phone]
FAX: [phone]
LICENSURE: FOR
NCENG:F-1253 ISSUED FOR REVIEW
NC GEOLOGY: C-247
SEAL SCALE: AS SHOWN DES: JL
NOT FOR
CONSTRUCTION
DUKE
ENERGY®
DWG TYPE: DWG
DFTR VD
6
CHIKD: AP
DATE:O 12/18/2019
ENGR: SA
FILENAME: ROX-C901.039.011B.dwg
APPD: CK
DWG SIZE
DRAWING NO.
REVISION
ANSI D
22"x34"
ROX C901.039.010
0
8
1
9
1
10
1
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Plotted By: Markham, Steven Sheet Set: 7812190186 - Roxboro CAMA Closure Plans Layout: PROFILE & CROSS -SECTIONS December 17, 2019 08: 54: 31am Q:\Duke Energy\Roxboro\7812190186 - CAMA Closure Plan\Issued for Perm itting\RevO\sheets\ROX-C901.039.01 1 B.dwg

2
3
4
5
6
7
8
ROX C901- 039.011
REV.
0
480.00
480.00
EXISTING GRADE
STA: 0+00.00
STA:10+46.55
ELEV. 472.50
ELEV. 472.25
470.00
470.00
460.00
460.00
A
-A-
PROPOSED MAIN DAM BREACH
450.00
450.00
LLLL
4
PRE -DECANTING
LLLL
1
MODELED
z
GROUNDWATER
z
O
440.00
SURFACE
440.00
O
�
�
W
W
wow(E)
GW(E)
_ 100 YEAR FLOOD
RESERVOIR ELEVATION 413'
ogre)
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W
430.00
- GEj
w(�
430.00
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B
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SURFACE WATER W�F
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)
ELEV 410.5' )
/ GW(E)
G�E)✓
o/
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420.00
420.00
I
410.00
410.00
SITE VICINITY
SCALE: 1 "=2000'
STA: 2+65.79
STA: 8+02.91
ELEV.405.41 PROPOSED BOTTOM OF BREACH
ELEV:405.00
400.00
400.00
0+00
1+00
2+00 3+00 4+00 5+00 6+00 7+00
8+00 9+00 10+00
10+50
C
C
SECTION D: MAIN DAM BREACH PROFILE VIEW
HORIZONTAL SCALE: 1 "=100'
VERTICAL SCALE: 1 "=10'
490.00
490.00
EXISTING
GRADE
LEGEND
0
480.00
/^
480.00
- - EXISTING GRADE
X
�
I
- - - - - -
- - /
- RESIDUAL SOIL GRADE (BOTTOM OF ASH)
^
PROPOSED GRADES
I0
C)
470.00
470.00
RESERVOIR ELEVATION
D
100 YEAR FLOOD ELEVATION
PRE -DECANTING
MODELED
GW(E) PRE -DECANTING MODELED GROUNDWATER
O
GROUNDWATER
SURFACE
SURFACE
460.00
460.00
O
171
.F--
~
GW(E)
G(E)
W) GW(E) GW(E)
GE)
GW(E) GW(E)
-WE
-
Z
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/
LL.
Z
0
450.00
J
450.00
0
30'
1
M
/
W
w
<
J
J
W
W
�
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20'
440.00
440.00
E
\
1
I
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10'
430.00
430.00
\
I
0 100' 200' 300'
RESIDUAL SOIL GRADE
0
420.00
(BOTTOM OF ASH)
420.00
TITLE
CCR SURFACE IMPOUNDMENT CLOSURE PLAN DRAWINGS
WOO
WEST ASH BASIN CLOSURE BY EXCAVATION
ROXBORO STEAM ELECTRIC PLANT
F
410.00
410.00
Environment &Infrastructure Solutions
F
-1+00
0+00
1+00
2+00
3+00 4+00 5+00 6+00 7+00 8+00
9+00 10+00 11+00
12+00
13+00 14+00
4021 STIRRUP CREEK DRIVE, SUITE 100 PERSON COUNTY, NORTH CAROLINA
DURHAM NC 203
TEL: [phone]
CROSS -SECTIONS
SECTION E: DIKE 1 (FILTER DIKE) PROFILE VIEW
FAX:81-9901
LICENSENSURE:
FOR
HORIZONTAL SCALE: 1 "=100'
NC ENG: F-1253
ISSUED FOR REVIEW
VERTICAL SCALE: 1 "=10'
NC GEOLOGY: C-247
NOTES:
SEAL
SCALE: AS SHOWN DES:
JL
DUKE DWG TYPE: DWG DFTR�
VD
1. PRE -DECANTING MODELED GROUNDWATER SURFACE:
1.1. SIMULATED STEADY-STATE GROUNDWATER HYDRAULIC HEADS IN THE TRANSITION
ZONE OR
ENERGY® JOB NO: 7812190186 CHKD:
AP
SAPROLITE FROM THE 2019 SYNTERRA GROUNDWATER MODEL. THIS FLOW MODEL WAS
NOT FOR
DATE: 12/18/2019 ENGR:
SA
CALIBRATED TO TIME -AVERAGED HYDRAULIC HEADS MEASURED IN MONITORING WELLS PRIOR
CONSTRUCTION
FILENAME: ROX-C901.039.012B.dwg APPD:
CK
TO THE START OF DECANTING.
DWG SIZE DRAWING NO. REVISION
12/18/2019
DESIGN PLAN JL SM AP SA
CK
ISSUED FOR REVIEW
ANSI ROX C901.039.011
0
0 7812190186
22"x34"
REV DATE I JOB NO.
PROJECT TYPE I DES I DFTR I CHKD I ENGR I
APPD
DESCRIPTION
TENTHS 10 20
30
4
5
6
7
8
9 10
INCHES 1 2 3
Plotted By: Markham, Steven Sheet Set: 7812190186 - Roxboro CAMA Closure Plans Layout: CROSS -SECTIONS December 17, 2019 08: 56: 04am Q:\Duke Energy\Roxboro\7812190186 - CAMA Closure Plan\Issued for Perm itting\RevO\sheets\ROX-C901.039.012B.dwg