NC0003468_SARP_Rev0_Appendix C_20161201

Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016
Duke Energy Coal Combustion Residuals Management Program
Dan River Steam Station Site Analysis and Removal Plan
Revision 0
APPENDIX C: DRAWINGS - DAN RIVER DAM
DECOMMISSIONING PLAN
amec
foster
wheeler

DNR C999.001.001
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DAM DECOMMISSIONING PLAN
DAN RIVER STEAM STATION
ROCKI-237 (DAN RIVER PRIMARY ASH BASIN)
ROCKI-238 (DAN RIVER SECONDARY ASH BASIN)
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SITE VICINITY MAP
NOT TO SCALE
SECONDARY ASH BASIN
PRIMARY ASH BASIN
ROCKINGHAM COUNTY, NORTH CAROLINA
PREPARED FOR:
DUKE ENERGY CAROLINAS, LLC
Sheet List Table
Sheet Number
Sheet Title
DNR
C999.001.001
COVER SHEET
DNR_C999.001.002
SITE AERIAL
DNR_C999.001.003
SITE EXISTING CONDITIONS
DNR_C999.001.004
ASH BASIN EXISTING CONDITIONS
DNR_C999.001.005
ASH BASIN CONDITIONS PRIOR TO CLOSURE
DNR_C999.001.006
DEMOLITION PLAN
DNR
C999.001.007
ASH BASIN INTERIM CONDITIONS
DNR
C999.001.008
ASH BASIN PROPOSED CLOSURE GRADES
DNR_C999.001.009
ASH BASIN PROPOSED STORMWATER PLAN
DNR_C999.001.010
EXISTING ASH BASIN PIPE PROFILES
DNR_C999.001.011
GENERAL DETAILS 1
DNR_C999.001.012
GENERAL DETAILS 2
DNR_C999.001.013
GENERAL DETAILS 3
DNR_C999.001.014
GENERAL DETAILS 4
Environment &
I
Infrastructure
.
2801YORKMONTROAD
amec
SUITE 100
CHARLOTTE, NC 28208
foster
TEL: [phone]
FAX: [phone]
wheeler
LICENSURE:
NC ENG: F-1253
NC GEOLOGY: C-247
SEAL
NOT FOR
CONSTRUCTION
TITLE
DAM DECOMMISSIONING PLAN
DAN RIVER STEAM STATION
COVER SHEET
FOR
PERMIT APPROVAL -
NOT FOR CONSTRUCTION
OWDWG
itft�
DUKE
ENEnGY®
SCALE: AS SHOWN
DES:
CSJ
TYPE: DWG
DFTR :
CSJ
JOB 0065
AAJ
DATE:NO:
12/9/2016
ENGRl:
CHR
FILENAME: .001 COVER SHEET.dwg
APPD:
CHR
DWG SIZE
DRAWING NO.
REVISION
W
IV
0
TZ
N
J
0
0
0
0
F-9
0
F
0 12/9/2016 1 7810-14-0065 1 DAM DECOMISSIONING I CSJ I CSJ I AAJ I CHR I CHR
REV DATE JOB NO. PROJECT TYPE I DES IDFTRICHKDIENGRI APPD
INCHES 1 2 3 TENTHS 10 20 30 4 5 6
dotted BV: Jordan, Chris Sheet Set: Dan River ABC Desiqn Dam Decommissioninq Layout: DNRC999.001.001 COVER SHEET December 09, 2016 03: 02: 20pm 0: ADuke\DanRiver\7810140065absat don river off site If\plansheets\abc design\.001 COVER SHEET.dwq
7
SUBMITTED FOR PERMIT APPROVAL
DESCRIPTION
ANSI 22"x34" DNR C999.001.001 0
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DNR C999.001.002 IRIEV. 0
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GWA-12S/D , O B 453 GWA-1 S/D
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TP-6
AS-10D (NO ASH) (LIMIT OF ASH)
41 OW-403S/D �, t: DUKE ENERGY PROPERTY ih.te
B-4560 TP-4 O B-451
(NO ASH) '
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O B 454 TP-7
TP-3 (ASH)
(ASH)
GWA-SS/D
TP-18B-30 '
: OW-407S/D OW-301D�
(ASH) *.
11`11 MW-301 BR •
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TP-2
(LIMIT OF ASH) /BMW-303BR TP 8 O B�52
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/ I TP-19 B-304® AS-12S OW-410S 0-324
/
MW-317BR® OW-317D (ASH) O O 62
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06316 :':
CLOSED LCID LANDFILL k `a ASH FILL 1
AS-6D / tst r► / '
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®
1 0 B-317 fB6302 B-306 OW-411 S/D TP-9 W 412S
�< ti B-315 OW-319S/D (ASH) ASH (ASH)
(ASH)
(ASH) (ASH) 1
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0 B-323 GWA-3S/DB-322OW-306r
ASH FILL 2 MW-306BR�®,
' -
,• �r ". - 0W-320D O B-460 TP-10
B-3140 OW-414S/D (ASH) �
MW-318D AS-4D TP-11 D
OW-305S (NO ASH)
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\ 0 TP-12
B-319 T(ASH) B-305
P-13 OW-305D OW 415S/D
0 B-318 (LIMIT OF ASH) GWA-11S/D
S COMBINED CYCLE STATION
% f, �• 1 �`� SD
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(ASH) AS-211) RAIL TRACKS
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MW-3010BR
SECONDARY ASH BASIN DPT-301
• \ ,9T \ ',r.:>� -., N � � 0 B-328, B-328A AB-35BR
OW-31OS/D OW-309D C-309 GWA-513RD
RISER AND PIPE FROM
'Oo GWA-7SID B-308 SECONDARY ASH I
IN BASIN TO OUTFALL
RISER AND PIPE FROM C-310 1 (ROCKI-238-OW07) 0 B 25
PRIMARY ASH BASIN TO CCR-7S OW-7 %3 GWA-15S/D �G
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ti SECONDARY ASH BASIN 0
0 B-327 — — 0 B-1
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AB-10S/D�
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_ = , MW-314BR® D
•• PRIMARY ASH BASIN
--- �z 1*'.s �OW-314S/D
DAN RIVER STEAM STATION I �''"''
(DECOMMISSIONING IN PROGRESS) ( .;` ,, 0 B-333
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ABANDONED WELL ID
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' OW-302D OW-409S AS-2D
OW-303D OW-410D AS-4D
�•, OW-304D OW-410S AS-6D
•�t� ,'�. a... OW-305D OW-411D AS-12S
-;;v�.y a OW-305S OW-411S GWA-1S
OW-306D OW-412S GWA-1D B—
OW-306S OW-413S GWA-11S
OW-307D OW-414D GWA-11D
OW-308D OW-414S
} OW-313D OW-415D
!' 0W-320D OW-415S
OW-321D OW-416D
t 0W-401D OW-416S
OW-401S OW-419S
OW-403D MW-301BR
UKE ENERGY PROPERTY OW-403S MW-303BR
OW-404D MW-306BR
OW-404S MW-308BR
OW-405D MW-315BR
OW-405S MW-318D
OW-406D GWA-21D C—
OW-406S GWA-2S
OW-407D GWA-3D
OW-4075 I GWA-3S
LEGEND
— — — — — —
EXISTING PROPERTY BOUNDARY
0
— — — — — — —
EXISTING 100-YEAR FLOODPLAIN
Z
—... ••• ••• •••—
EXISTING STREAM
/v
/v
EXISTING WETLAND
I
TEST PIT (SEE NOTE 1)
\ J
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AMEC FOSTER WHEELER HISTORIC BORING
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AMEC FOSTER WHEELER HYDROGEOLOGIC STUDY
LANDFILL BORING
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AMEC FOSTER WHEELER HISTORIC OBSERVATION
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WELL
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AMEC FOSTER WHEELER HYDROGEOLOGIC STUDY
OBSERVATION WELL
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AMEC FOSTER WHEELER HYDROGEOLOGIC STUDY
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OBSERVATION WELL PAIR
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DUKE ENERGY VOLUNTARY WELL PAIR
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DUKE ENERGY COMPLIANCE WELL
C
DUKE ENERGY COMPLIANCE WELL PAIR
CPT
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HDR, INC. GROUNDWATER ASSESSMENT WELL
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HDR, INC. GROUNDWATER ASSESSMENT WELL
CLUSTER
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#:� . 0 B-335 C-307 NOTES:
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ti 1Ca. . r ` a "6 . / ' • " ' O B-331 P
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CHARLOTTE, NC 28208 foster
GWA6S/D
TEL:[phone]
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MW-22BR FAX: [phone] wheeler
LICENSURE:
NC ENG: F-1253 FOR
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REFERENCES
0 12/9/2016 7810-14-0065 DAM DECOMISSIONING I CSJ I CSJ I AAJ I CHR I CHR
1. AERIAL IMAGERY IMPORTED FROM NC ONE MAP, DATED 2014 REV DATE JOB NO. PROJECT TYPE I DES I DFTR CHKD ENGR I APPD
INCHES 1 2 3 TENTHS 10 20 30 4 5 6
dotted By: Jordan, Chris Sheet Set: Dan River ABC Desiqn Dam Decommissioning Layout: DNR C999.001.002 SITE AERIAL December 09, 2016 12: 33: 53pm Q:\Duke\DonRiver\7810140065 sabot don river off site If\plansheets\abc design\DNR C999.001.002 SITE AERIAL.dwq
200 0 200 400 FT
DAM DECOMMISSIONING PLAN
DAN RIVER STEAM STATION
SITE AERIAL
NC GEOLOGY: C-247
PERMIT APROVAL - NOT FOR CONSTRUCTION
SEAL
NOT FOR
CONSTRUCTION
DUKE
ENE RG�®
SCALE: AS SHOWN
DES: CSJ
DWG TYPE: DWG
DFTR : CSJ
JOB 00065
AAJ
DATE: 12/9/2016
E NGRI : CHR
FILENAME: DNR_C999.001.002 SITE AERIAL.dwg
APPD: CHR
DWG SIZE
DRAWING NO.
REVISION
ANSI IDNR
22"x34x34"
C999.001.002
—
0
SUBMITTED FOR PERMIT APPROVAL
DESCRIPTION
7 8 9 10
F—

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REFERENCES
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\� \ \ V ��/ / �j/j A / v AVA SECONDARY BASIN NC STATE DA M ID
v II
\ \ \ \ ` / / / / / // ❑ \ / 3 \ \\\ \ \ \\ \ \ ROCKI-238
Q V A\\ `I/ �� II I I / I � ICI .�':'�. .• A � I /�/ �/A// / / � / �/ �_vv � _�� A AvA� 11 \ OVA A\ \ ( /�,�—� � —� 00` /O/�%�/� ��I
o � v`vA� I ® � � I I 1 I /�I ):d. �,• �/l �// r/�/ / v O �/ % / /�,�. ) 1 � I� I � vOv vvv `� v �v � ,— - %;___--- ----_ __ '„//,®i/ �� � I[I
Ov / vv\ •� 1. :• �/ / r// /��� / / /
�J
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2pz, / j /// / A / AV
1 \
r// /i\ J 1 /
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zxi
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/ / /i / / / <V I
DEMOLITION NOTES
l \ ��i//�i ii i'/�� O _ vA� V ✓�
�o
T J — i 1 C i / / / / / ////./ /i 1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR DEMOLITION AND DISPOSAL OF DEMOLITION DEBRIS IN AN
�II /i ///// \ / v ��— / i/ / \ ///�/�/i i
� �� i � I / / /� / APPROVED AND REGULATED OFF -SITE OR ON -SITE LANDFILL, FOR FEES AND COSTS ASSOCIATED WITH
`\\/ /i ��/ TRANSPORTATION AND DISPOSAL.
zz
I� \ vO 1`
\ / / A�\ \ NCSTAT DAW�ID
�j // // / A \ v J T� v 2. CONSTRUCTION DRAWING DETAILS FOR THE PRIMARY AND SECONDARY ASH BASIN OUTLET STRUCTURES
L / /i �/ // / // / / �� \ _ \ ROCKI-237 // // �j/j///// ///// ` WILL BE PROVIDED TO THE CONTRACTOR BY THE OWNER. THE CONTRACTOR IS RESPONSIBLE FOR
// / /i / AO \ I / / / / /� / /
/ /� � / / � \ \ � — J � I — — / / /� / / ////j ' //j //�j/ REVIEWING AND UNDERSTANDING THE DRAWINGS SUCH THAT THE CONTRACTOR IS FAMILIAR WITH THE
— / / //// ///// STRUCTURES AND THE SCOPE OF WORK REQUIRED FOR DEMOLITION.
/ �� �V / y A
� \�A /�—/
OUTLET STRUCTURE DEMOLITION NOTES
1. THE PRIMARY AND SECONDARY ASH BASIN OUTLET STRUCTURES WILL BE DEMOLISHED IN STAGES AS
/ / / j/ / / �� �� // / �� / / / % / / / j i / //�/,m/ �l / �G� EXCAVATION OF THE ASH PROGRESSES. AT NO TIME SHALL THE EXPOSED HEIGHT OF THE OUTLET
PRIMARY BASIN I 1\ l \ / /� /
\ // / /// l i �// �� STRUCTURES BE ALLOWED TO BE GREATER THAN 15 FEET.
�1y)
/i /
\ �--�� � \ � (j� � — /� / / / j /j/� //� / �// / / /� 2. AS THE PRIMARY AND SECONDARY ASH BASIN OUTLET STRUCTURES ARE DEMOLISHED, A SUFFICIENT
�i/ \ / �� '�\ \ T / i / / / / // / �/ / / % HEIGHT OF STRUCTURE WILL BE LEFT IN PLACE SUCH THAT STORM RUNOFF OR RUNOFF PRODUCED FROM
v�< /j� // // / / //�A/ DEWATERING EFFORTS CANNOT DIRECTLY ENTER THE REMAINING PORTION OF THE OUTLET STRUCTURE.
/ /� // 3. DURING DEMOLITION AND EXCAVATION WITHIN THE BASIN, SAFETY BARRIERS SHALL BE ERECTED AND
�/ %/ / / J — A I V / / / // �� /j� j .//� MAINTAINED AROUND THE OUTLET STRUCTURES FORMING A 25 FOOT PERIMETER AROUND EACH
v / / // ii /% // �O /�i/
/ INDIVIDUAL STRUCTURE. THE SAFETY BARRIERS CAN CONSIST OF CONTINUOUS RED OR YELLOW WARNING
TAPE SUSPENDED FROM POSTS OR OTHER APPROVED DEVICES.
4. DURING DEMOLITION AND EXCAVATION WITHIN THE BASIN, ANY OPENINGS IN THE OUTLET STRUCTURES
SHALL BE COVERED TO PREVENT TRIPPING OR FALLING SAFETY HAZARDS PER FEDERAL, STATE, AND
\ / OWNER REGULATIONS, RULES, AND/OR POLICIES.
\ // / // // /� J\
12 / j % / i/ 40 0 40 80 FT
//l l/ 11 a \_— —/ — ------ — / _ j / — TITLE
Environment & �� DAM DECOMMISSIONING PLAN
� = 7 _ � � / Infrastructure .
r / // / / l \ \ \ \ kS — _ _ _ _ ❑—' ` ji / / ` —/� /%/ 2801 YORKMONTROAD DAN RIVER STEAM STATION
amec
SUITE100
\ \ \ �\ — — -- _ _ _ — — O — �; = —�,' i // / i CHARLOTTE, NC 28208 Oster
X�! — \—__ -- — — TEL: [phone] DEMOLITION PLAN
530 — _ _ _ _ .�— — — — —� i — �i _ ii i FAX: [phone]
— — _ — _ — — .. LICENSURE: W�eeler
NC ENO F-12= FOR NC GEOLOGY:
C-247
— PERMIT APPROVAL NOT FOR CONSTRUCTION
SEAL SCALE: AS SHOWN DES: CSJ
CSJ
TYPE: -500 — —-- — _ — - — — — — DUKE DWG DWG
_ — ---- — --_— DFTR'
�490 — —
__^� ®
JOB NO: 7810-14-0065 CHI AAJ
— — — NOT FOR ENERGYDATE: 12/9/2016 El CHR
DEMOLITION TABLE
IDENTIFICATION NO.
DESCRIPTION
8
36-IN. DIA. RCP
9
DRAINAGE BOX
10
STORMWATER DIVERSION PIPE 1 (INCLUDES THRUST BLOCKS, BOLLARDS,
DIAPHRAGM DRAIN AND ANTI -FLOTATION COUNTERMEASURES)
11
ANTENNA TOWER
12
HDPE PIPE - SLUICE LINE TO PRIMARY BASIN OUTLET STRUCTURE
13
HISTORICAL PRIMARY ASH BASIN OUTLET STRUCTURE AND PIPE
(LOCATION ASSUMED)
0 12/9/2016 7810-14-0065 DAM DECOMISSIONING CSJ CSJ AAJ CHR CHR SUBMITTED FOR PERMIT APPROVAL
REV DATE JOB NO. PROJECT TYPE DES DFTR CHI ENGR APPD DESCRIPTION
CONSTRUCTION
FILENAME: DNR_C999.001.006 DEMOLITION PLAN.dwg
APPD: CHR
DWG SIZE
DRAWING NO.
REVISION
ANSI IDNR
22"x34x34"
C999.001.006
0
TENTHS 10 20 30 4 5 1 1 8 1 10
INCHES 1 2 3
0
1.1
0
Z
0
0
0
0
0
m
0
F
Plotted By: Jordan, Chris Sheet Set: Dan River ABC Design Dam Decommissioning Layout: DNR C999.001.006 DEMOLITION PLAN December 09, 2016 03: 43: 42pm Q: \Duke\DanRiver\7810140065 coast don river off site If\plansheets\abc design \DNR C999.001.006 DEMOLITION PLAN.dwg

THE CONTRACTOR SHALL ADHERE TO THE FOLLOWING MINIMUM FREEBOARD
REQUIREMENTS:
SCENARIO 1 - PRIMARY ASH BASIN AND SECONDARY ASH BASIN ARE NOT
HYDRAULICALLY LINKED (EXCEPT FOR THE EXISTING PIPE AND CULVERT SYSTEM
FROM THE PRIMARY ASH BASIN TO THE SECONDARY ASH BASIN):
PRIMARY ASH BASIN FREEBOARD = 4 FT
SECONDARY ASH BASIN FREEBOARD = 10 FT
SCENARIO 2 - PRIMARY ASH BASIN AND SECONDARY ASH BASIN ARE EXCAVATED
SUCH THAT A CONSISTENT ASH/WATER SURFACE ELEVATION IS MAINTAINED ACROSS
BOTH BASINS:
ASH BASIN FREEBOARD = 7 FT
DURING DECOMMISSIONING ACTIVITIES CCR MATERIAL WILL BE REMOVED AND THE
EXISTING RISER STRUCTURE WILL BE LOWERED IN A STEPPED FASHION. NOTE THAT
FREEBOARD IS MEASURED AS THE DIFFERENCE BETWEEN THE LOWEST POINT ON
THE BASIN CREST AND THE AVERAGE ELEVATION OF MATERIAL (CCR OR WATER)
WITHIN THE BASIN OR THE RISER CREST, WHICHEVER IS HIGHER.
LEGEND
700 — EXISTING MAJOR CONTOUR (10') [REF. 11
EXISTING MINOR CONTOUR (2') [REF. 11
700 PROPOSED MAJOR CONTOUR (2') (NOTE 2)
6i�A
\
VA\�
G A/
' \\ - _
0- PROPOSED SEDIMENT BASIN OUTLET
000— PROPOSED BAFFLE
EXISTING PROPERTY BOUNDARY
— — — — — — — EXISTING 100-YEAR FLOODPLAIN \ O
G EXISTING NATURAL GAS PIPELINE
----G — — — —G NATURAL GAS PIPELINE NOT SURVEYED
r /
EXISTING FENCE � � l � _�-� � � � �V I 1 I �V A � �/
EXISTING VEGETATION BOUNDARY
EXISTING PIPES � � � � / � � � :.� : ;A• • V • )
l t /
EXISTING RIP RAP / • ' 4 ' . f /�/
EXISTING WETLAND
— • • • • • • • • • • • • — EXISTING STREAM
NOTES:
1. SEDIMENT BASIN WILL DISCHARGE THROUGH EXISTING NPDES OUTLET
% i 2. GRADING PLAN SHOWS MAXIMUM 3H:1V TIE-IN SLOPES. TIE IN SLOPES MAY BE
SHALLOWER TO ACHIEVE A BALANCE OF CUT AND FILL
3. STORMWATER CONVEYANCE DEVICES WILL BE INSTALLED AS NECESSARY TO
ACHIEVE INTERIM CONDITIONS GRADES. REFER TO DRAWING I C999.001.009 FOR -j
COMPLETE STORMWATER CONVEYANCE DEVICE LAYOUT j /j � \
7777zz
7
LA
/ _ o
� i Y
\ a /
ED
T� xzx/�/
-
E
/
/
510
F IBASI ---- ------ �_ �-
00
490
REFERENCES
1. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC
METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON FEBRUARY 7. 2014 BY LDSI. INC.
0 12/9/2016 7810-14-0065 DAM DECOMISSIONING CSJ CSJ AAJ CHR CHR
REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD
SUBMITTED FOR PERMIT APPROVAL
DESCRIPTION
NOT FOR
CONSTRUCTION
DNR C999.001.007 IRIEV. 0
//
,j % APP OXI MATE GAS / / //
NE LOCCA ION
540 i / / — // /
It
/' v v / v AII�IIII I'll
oo—
SB-4
(SEE NOTE 1)
EXISTING RISER STRUCTURE TO BE
LOWERED IN STAGES DURING CCR
REMOVAL TO MAINTAIN FREEBOAl
REQUIREMENTS
0 FT
ING PLAN
STATION
)NDITIONS
PERMIT APROVAL
- NOT FOR CONSTRUCTION
/ DUKE
ENEnf'**%/'
SCALE: AS SHOWN
DES:
CSJ
DWG TYPE: DWG
DFTR :
CSJ
JOB 0065
DATTE:012/9/2016
El
CHR
FILENAME:
DNR_C999.001.007 ASH BASIN INTERIM CONDITIONS.dwg
APPD:
CHR
DWG SIZE
DRAWING NO.
REVISION
ANSI
22"x34"
DNR
C999.001.007
0
0
9
0
TZ
N
I
�J
0
0
0
0
ZJ
F1
0
F
INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7
1 1 1
dotted By: Jordan, Chris Sheet Set: Dan River ABC Desiqn Dam Decommissioning Layout: DNRC999.001.007 ASH BASIN INTERIM CONDITIONS December 09, 2016 12: 39: 30pm O: ADuke\DanRiver\7810140065absat don river off site If\plansheets\abc design\DNRC999.001.007 ASH BASIN INTERIM CONDITIONS.dwq
i
9 10

700
700
G
---G----G
I / \ I \ \\\\ \ \ I W _ - — —
540
vvv A IA\VA ��\�� X ��� / /lJ���I� �I� \\I �/�'
�Ovv`,v / VI �� 1 �//)/ A\\wO�� �� X���= - � i / � / 11 /l� �•: �•\ III � // � ��--- � � '� � ///
v, I ��" l / / / / / / / � / / / O • // _
vvv�I�I��Lj
: (• . .� \ � J/ it / �l \ \ \ \ \ � \\\ \\ \ \ _ 55 � O / _ � / � / % %i � / 510
vv/\••'• • „' � vvv � -.,�., � _/ / , / ,_�
540
EXISTING RIP RAP
ACCESS RAMP
EXISTING WETLAND
4
_--- ••. ••. •••_ EXISTING STREAM
NOTES:A•••
1: GRADING PLAN SHOWS MAXIMUM 3H:1V TIE-IN SLOPES. TIE IN SLOPES MAY BE
SHALLOWER TO ACHIEVE A BALANCE OF CUT AND FILL
2: STORMWATER CONVEYANCE DEVICES WILL BE INSTALLED AS NECESSARY TO
ACHIEVE INTERIM CONDITIONS GRADES. REFER TO DRAWING DNR_C999.001.009 FOR I / / / • ; \; ; :� :�
COMPLETE STORMWATER CONVEYANCE DEVICE LAYOUT / ; •� • • �'; ;
1 /
I I� � I I I I /:'4'•�• /�/j
U') %Oii/00�
/V/
r
510=
EXISTING MAJOR CONTOUR (10-) [REF. 11
EXISTING MINOR CONTOUR (2') [REF. 11
PROPOSED MAJOR CONTOUR (10') (NOTE 1)
PROPOSED MINOR CONTOUR (10') (NOTE 1)
EXISTING PROPERTY BOUNDARY
EXISTING 100-YEAR FLOODPLAIN
EXISTING NATURAL GAS PIPELINE
NATURAL GAS PIPELINE (NOT SURVEYED)
EXISTING FENCE
EXISTING VEGETATION BOUNDARY
EXISTING PIPES
ACCESS RAMP
000
O
1N
E \
i
i
500
i
-_�_ -
_ 490
REFERENCES
1. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC 0 12/9/2016 7810-14-0065 DAM DECOMISSIONING CSJ CSJ AAJ CHR CHR SUBMITTED FOR PERMIT APPROVAL
METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON FEBRUARY 7, 2014 BY LDSI, INC. REV DATE JOB NO. PROJECT TYPE DES DFTR CHI ENGR APPD DESCRIPTION
INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7
1 1
dotted Bv: Jordan, Chris Sheet Set: Dan River ABC Desiqn Dam Decommissioninq Layout: DNR C999.001.008 ASH BASIN PROPOSED CLOSURE GRADES December 09, 2016 12: 40: 40pm Q:\Duke\DonRiver\7810140065 obsct don river off site If\plcnsheets\cbc design\DNR C999.001.008 ASH BASIN PROPOSED CLOSURE GRADES.dwq
Environment &
Infrastructure
.A
2801YORKMONTROAD
amec
SUITE 100
CHARLOTTE, NC 28208
foster
TEL: [phone]
FAX: [phone]
wheeler
LICENSURE:
NC ENG: F-1253
NC GEOLOGY: C-247
SEAL
NOT FOR
CONSTRUCTION
FOR
DNR C999.001.008 IRIEV. 0
/ _ vV A /11111111111� / (
N I IIII I
490
ABANDON EXISTING RISER /
STRUCTURE TO RESTORE OPEN
CHANNEL FLOW
I
DAM DECOMMISSIONING PLAN
DAN RIVER STEAM STATION
ASH BASIN PROPOSED CLOSURE GRADES
PERMIT APROVAL - NOT FOR CONSTRUCTION
DUKE
• ENE RGY®
SCALE: AS SHOWN
DES:
CSJ
DWG TYPE: DWG
DFTR :
CSJ
JOB 0065
CHI
AAJ
DATTE:012/9/2016
El
CHR
FILENAME:
DNR C999.001.008 ASH BASIN PROPOSED CLOSURE GRADES.d
PI
CHR
DWG SIZE
DRAWING NO.
REVISION
ANSI
22"x34"
DNR
C999.001.008
0
W
IV
0
TZ
N
J
Cfl
Cfl
Cfl
0
0
O
O
00
F-,
O
F
N.
9 10

2 3 4 5 6 7
Sll
_%� � — � _ _ — I 1 1 I � I �'I• �.� III � I I/ � v ,' _ --, /
M I %�N
DD-2 01 / / / Dl-3�D�
EX IAfG/ ��
� q -
- Sb-7— _ / / ( EM jII PL —
x/
2 RIPRAP DISSIPATOR — _ / / / / 012
013 RD-3 V — / " / /
7 INTERCEPTOR DITCH
INSET A (SCALE: 1" = 50') � °� / / ID - 13 1
o / /
/�\�V/ v� 1� / o I •I 1. :�� /i 7 L
7
11.54
S /%y`L /� SLO RAI
— 3p •�j /�/�/ SD-1 (JACK BO
LONGITUDINAL DITC
011
7 TD-5
/ Da
51118 505 48
DNR C999.001.009 IREV. 0
�As
F /) A
SEE INSET A
ID - 12
V
I ti
B
500.24 OD - 1
G-4 /
i
SEE INSET E
OD - 3/�/���
ID-1 ID- L T D - 4
ID - 12 // LEGEND
G - 3 EXISTING MAJOR CONTOUR (10') [REF. 11
/ o �!
SEE INSET D — 700 —EXISTING MINOR CONTOUR (2') [REF. 11
/ 0 PROPOSED MAJOR CONTOUR (10') 0
5 .26
/ 5 5.96 //� PROPOSED MINOR CONTOUR (2')
PROPOSED DITCH 0
L G TD_3
/ OD-2
TD-2 /7
/ r / 2 TOE DITCH/17
V 011 TD-1
< < < < < <
4 OUTLET DITCH j _/ SEE INSET C
�( 011 OD —1
_ = 490
SEE INSET B 1 RIPRAP GABION
013 G —1
OD-1
�
\J� G-1 TIE IN
TO OD-1
-- _—_
— CG1_
/
/ � �
/
2 TpE IN
TO-Ol 2/ /
--- -- ---
—••—••—••—••—••—••—
G
— — —G — — — —G
PROPOSED SLOPE DRAINICULVERT
EXISTING PROPERTY BOUNDARY
EXISTING 100-YEAR FLOODPLAIN
EXISTING NATURAL GAS PIPELINE
NATURAL GAS PIPELINE (NOT SURVEYED)
0
�7
-
EXISTING FENCE
F9
:<
/
O
INSET B (V = 60')
INSET C (V
= 60')
EXISTING VEGETATION BOUNDARY
/
OD-4
EXISTING PIPES
OD- /j/
G-4 TIE IN
TO OD-4
EXISTING RIP RAP
EXISTING WETLAND
G-3 TIE IN %
_ —
G-4
— ... ... ...
... _ EXISTING STREAM
TO OD-3 /
100 0
100 200 FT
INSET D (V = 60')
INSET E (V = 60')
TITLE
Environment &
.�
DAM DECOMMISSIONING PLAN
Infrastructure
DAN RIVER
STEAM STATION
F
2801 YORKMONT ROAD
amec
SUITE 100
CHARLOTTE, NC 28208
foster
TEL: [phone]
FAX: [phone]
wheeler
ASH BASIN PROPOSED STORMWATER PLAN
LICENSURE:
NC ENG: F-1253
FOR
NC GEOLOGY: C-247
PERMIT APPROVAL -
NOT FOR CONSTRUCTION
SEAL
DUKE
SCALE: AS SHOWN DES:
DFTR
CSJ
DWG TYPE: DWG :
CSJ
ENEnGY
0065 CH
AAJ
NOT
FOR
\
DATE:012/9/2016 El
CHR
CONSTRUCTION
FILENAME: DNR_C999.001.009 ASH BASIN PROPOSED STORMWATER PLAN
6R?D: CHR
DWG SIZE
DRAWING NO.
REVISION
ANSI
22"x34"
DNR C999.001.009
0
REFERENCES
1. EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC 0 12/9/2016 7810-14-0065 DAM DECOMISSIONING CSJ CSJ AAJ CHR CHR SUBMITTED FOR PERMIT APPROVAL
METHODS FROM AERIAL PHOTOGRAPHY OBTAINED ON FEBRUARY 7, 2014 BY LDSI, INC. REV DATE JOB NO. PROJECT TYPE DES DFTR Cl ENGR APPD DESCRIPTION
—
TENTHS 10 20 30 4 5 6 7 8 9 10
INCHES 1 2 3
dotted By: Jordan, Chris Sheet Set: Dan River ABC Desiqn Dam Decommissioning Layout: DNR C999.001.009 ASH BASIN PROPOSED STORMWATER PLAN December 09, 2016 03: 08: 54pm Q: \Duke\DanRiver\7810140065 obsct don river off site If\plansheets\abc design\DNR C999.001.009 ASH BASIN PROPOSED STORMWATER PLAN.dwq

DNR C999.001.010
REV. 0
540
530
520
510
500
490
480
475
M'S
-0+25 0+00 1+00
EXISTING PIPE INVERT ELEV. = 506.44'
(REF. 1)
540
530
520
10
500
490
480
475
2+00
3+00
4+00
5+00
-paw
6+00 7+00 8+00 9+00
1 48 INCH DRAINAGE PIPE (GROUTED)
1\0J,I(SEE NOTE 1)
EXISTING DRAINAGE BOX TOP ELEV. = 515.75'
(REF. 3)
CONCRETE PLUG AT INLET A
540
530
520
510
500
490
485
10+00 11+00
EXISTING PIPE OUTFALL ELEV. 484'j
(REF. 1)
540
530
520
510
500
490
480
475
11+75
540
530
520
510
500
490
480
475
6+00
EXISTING 54" 1
-0+25 0+00 \1+00
— CID
EXISTING PIPE INVERT ELEV. = 510.72'
(REF. 3)
EXISTING 36" 1
540
530
520
510
500
490
485
2+00
EXISTING DRAINAGE BOX BOTTOM ELEV. = 502'
(REF. 3)
3+00 4+00
EXISTING 36" 1
540
530
520
510
500
490
485
5+00 6+00
GROUTED (REF. 3)
6+00 7+00 8+00 9+00 10+00
r2-N�36 INCH DRAINAGE PIPE (GROUTED)
(SEE NOTE 1) GROUTED (REF. 3)
J,
530 —
520 —
510 —
500 —
490
480
475 L
-0+50
F
EXISTING RISER STRUCTURE TO BE LOWERED
IN STAGES DURING CCR REMOVAL TO MAINTAIN
FREEBOARD REQUIREMENTS
0+00 1+00
EXISTING PIPE INVERT ELEV. = 498
(REF. 2)
EXISTING PIPE OUTFALL ELEV. 495
(REF. 2)
SECONDARY BASIN OUTLET STRUCTURE
EXISTING 36" 1 1
2+00
530
1.119
1.1819
490
480
475
2+50
540
530
520
510
500
490
485
11+00 11+25
EXISTING PIPE OUTFALL ELEV. = 492'
PLUG (REF. 3) (REF. 3)
1 0 1 12/9/2016 1 7810-14-0065 DAM DECOMISSIONING CSJ CSJ AAJ CHR CHR SUBMITTED FOR PERMIT APPROVAL
IREV I DATE I JOB NO. PROJECT TYPE I DES IDFTRICHKDIENGRI APPID DESCRIPTION
I I I I I 7=1 I I I I I I
IINCHES 11 21 3 ITENTHS 10 1 20 1 30 4 5
'lotted By: Jordan, Chris Sheet Set: Dan River ABC Desiqn Dom Decommissioning Layout: DNR —C999.001.010 EXISTING ASH BASIN PIPE PROFILES December 09, 2016 12: 46:12pm O:\Duke\DcnRiver\7B10140065 absot dcn river off site lf\plcnsheets\obc desiqn\DNR—C999.001.010 EXISTING ASH BASIN PIPE PROFILES.dwq
LEGEND
EXISTING GRADE
Lj- PROPOSED GRADE
O CONCRETE PLUG Makff k
GROUT
0 NOTES
14- 1: LOCATION OF GROUTED SECTIONS OF PIPES ARE
APPROXIMATE
REFERENCES:
1 1: 1 "DAN RIVER POWER PLANT 48" 1 PIPE S.W. PIPE
SECTION AND PLAN VIEW' DATE: 04/17
1 2: 1 NO. D-1039-M-I Rev. No. 3 APPROVED 11/7/1980
0 1 3: 1 "DAN RIVER POWER PLANT 42736" 1 PIPE S.W.
PIPE SECTION AND PLAN VIEW' DATE: 04/17
0
14-
Environment &
Infrastructure
2801 YORKIVIONT ROAD
amec
rf
SUITE 100
CHARLOTTE, NC 28208
foster
TEL: [phone]
FAX: [phone]
wheeler
LICENSURE:
NC ENG: F-1253
NC GEOLOGY: C-247
SEAL
NOT FOR
CONSTRUCTION
TITLE
DAM DECOMMISSIONING PLAN
DAN RIVER STEAM STATION
EXISTING ASH BASIN PIPE PROFILES
FOR
PERMIT APROVAL - NOT FOR CONSTRUCTION
DUKE
ENE RGY®
SCALE: AS SHOWN
DES:
CSJ
I TYPE: I
I
CSJ
JOB NO: 7810-14-0065
CHI
AAJ
I DATE: 12/9/2016
El
CHR
FILENAME:
DNRC999.001.010 EXISTING ASH BASIN PIPE PROFILES.dwg
APPID:
CHR
I SIZE
DRAWING NO.
REVISION
ANSI I
22"x34"
DNR C999.001.010
0
F
E-*1
9 10

DNR C999.001.011 IREV. 0
w
N 0
z
w
w
NOTES:
1. ACTUAL DEPTH OF CHANNEL MAY VARY
2. SOIL SUBGRADE IS CLASSIFIED AS SOILS THAT MEET ALL CCR REMOVAL VERIFICATION STANDARDS
Channel Dimensions
ASH BASIN LONGITUDINAL DITCH
SCALE: 1" = 2'
Channel
ID
Channel
Type
Bottom
Width
{b}
I
MIN.
Depth
{D}
(
Left Side
Slope
(Z,H:V}
Right Side
Slope
{Z2H:V}
Top Width
{T}
(ftj
Upstream
Invert
00
Downstream
Invert
(ft)
Length
(L)
l
Longitudinal
Slope
{S}
(f{S)
5A
I NT
4
1.5
20
20
VARIES
514
500
973
0.014
5B
I NT
0
1.5
20
20
506
504
379
0.005
6A
I NT
0
1.5
20
20
510
504
212
0.029
6B
I NT
0
1.5
20
20
510
504
202
0.030
6C
I NT
0
1.5
20
20
505
500
318
0.017
6D
I NT
0
1.5
20
20
504
500
269
0.015
7A
I NT
0
1.5
20
20
510
506
245
0.016
7B
I NT
0
1.5
20
20
510
509
312
0.006
7C
I NT
0
1.5
20
20
504
502
245
0.009
7D
I NT
0
1.5
20
20
504
502
241
0.009
8A
I NT
6
1.5
20
20
508
500
662
0.012
8B
I NT
0
1.5
20
20
504
502
564
0.004
DID-1
DIV
2
2
3
3
529
526
381
0,007
DID-2
DIV
2
2
3
3
531
526
304
0.014
DD-3
DIV
2
2
3
3
531
528
48
0.056
DD-4
DIV
2
2
3
3
530
528
80
0.024
DID-5
DIV
2
2
3
3
530
529
94
0,011
DD-6
DIV
2
2
3
3
532
529
40
0.D78
51
TD
0
2
5
5
2.50
0
468
0.005
6E
TD
0
2.5
3
3
2.68
0
552
0.005
6F
TD
6
1.5
3
3
1.36
1 0
289
0.005
7E
TD
6
1.5
3
3
1.40
0
289
0.005
7F
TD
6
2
3
3
1.40
0
432
0.003
8C
TD
6
1.5
3
3
1.39
0
305
0.005
LD-1A
LD
6
6
3
3
508
504
335
0,012
LD-1B
LD
6
4
3
3
504
500
312
0.013
LD-1C
LD
6
4
3
3
500
498
184
0.010
LD-11D
LD
6
4
3
3
498
497
107
0.009
LD-2A
LD
6
4
3
3
510
506
782
0.014
LD-2B
LD
6
3
3
3
506
502
306
0.014
LD-2C
LD
6
3
3
3
501
498
166
0.018
LD-21D
LD
6
3
3
3
498
496
107
0,019
F
r4_"
ASH BASIN OUTLET DITCH DETAIL
011 SCALE: 1" = 2'
I
20'
NCDOT CLASS 1 RIPRAP
rP@
0
fl
5' 1 5'
w
5 5 ~
�z
w
w
U)
A
SOIL SUBGRADE (SEE NOTE 2)
NOTES:
1. ACTUAL DEPTH OF CHANNEL MAY VARY
2. SOIL SUBGRADE IS CLASSIFIED AS SOILS THAT MEET ALL CCR REMOVAL VERIFICATION STANDARDS
20
SOIL SUBGRADE (SEE NOTE 2)
NOTES:
1. ACTUAL DEPTH OF CHANNEL MAY VARY
2. SOIL SUBGRADE IS CLASSIFIED AS SOILS THAT MEET ALL CCR REMOVAL VERIFICATION STANDARDS
ASH BASIN INTERCEPTOR DITCH
SCALE: 1" = 2'
WIDTH VARIES
6'1
� I-IIII -IIIIIIIII-III- � � ,
80Z/SY NONWOVEN GEOTEXTILE SOIL SUBGRADE (SEE NOTE 2)
NOTES:
1. ACTUAL DEPTH OF CHANNEL MAY VARY
2. SOIL SUBGRADE IS CLASSIFIED AS SOILS THAT MEET ALL CCR REMOVAL VERIFICATION STANDARDS
0 12/9/2016 7810-14-0065 DAM DECOMISSIONING I CSJ I CSJ I AAJ I CHR I CHR SUBMITTED FOR PERMIT APPROVAL
REV DATE JOB NO. PROJECT TYPE I DES IDFTRICHKDIENGRI APPD DESCRIPTION
INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7
I I I I
dotted By: Jordan, Chris Sheet Set: Dan River ABC Desiqn Dam Decommissioning Layout: DNRC999.001.011 GENERAL DETAILS 1 December 09, 2016 12: 46: 43pm Q: ADuke\DanRiver\7810140065absat don river off site If\plansheets\abc design\DNRC999.001.011 GENERAL DETAILS 1.dwg
2 ASH BASIN TOE DITCH
��i
SCALE: 1" = 2'
20'
2' r� 2' i 6'
3 3
1=111-
_w
0
z
w
w
co
w
N 0
z
w
w
U)
SOIL SUBGRADE (SEE NOTE 2)
NOTES:
1. ACTUAL DEPTH OF CHANNEL MAY VARY
2. SOIL SUBGRADE IS CLASSIFIED AS SOILS THAT MEET ALL CCR REMOVAL VERIFICATION STANDARDS
5 DIVERSION DITCH
��i
SCALE: 1" = 2'
Environment &
.
Infrastructure
2801YORKMONTROAD
amrf
SUITE 100
CHARLOTTE, NC 28208
foster
TEL: [phone]
FAX: [phone]
wheeler
LICENSURE:
NC ENG: F-1253
NC GEOLOGY: C-247
SEAL
NOT FOR
CONSTRUCTION
TITLE
LEGEND
SOIL SUBGRADE
DAM DECOMMISSIONING PLAN
DAN RIVER STEAM STATION
GENERAL DETAILS 1
FOR
PERMIT APROVAL - NOT FOR CONSTRUCTION
4115 DUKE
ENEnf'**%/®
SCALE: AS SHOWN
DES:
CSJ
DWG TYPE: DWG
DFTR :
CSJ
JOB 0065
CHI
AAJ
DATE:012/9/2016
El
CHR
FILENAME:
DNR_C999.001.011 GENERAL DETAILS 1.dwg
APPD:
CHR
DWG SIZE
DRAWING NO.
REVISION
ANSI
22"x34"
DNR C999.001.011
0
9
r9
0
F
9 10

REV. 0
F
LENGTH AS NECESSARY
TO GO THRU DIKE __\
4' MIN. PIPE
15MIN. 112
FLEXIBLE PIP
TIE DOWN 10' MAX. SPACIN1-111-11 =_iiIIIIII
TIE DOWN ATE 1 11
4' (MIN)'
DIAMETER (D) ENERGY DISSIPATER
PROFILE
' AT LESS THAN 1 % SLOPE
FLOW
EXTEND TO EDGE OF DISTURBANC
RIP RAP & WASHED STONE
FILTER BERM
SEDIMENT PIT
r AW
2 = I _-
-- --i l
013
STAKES
a-r EARTH DI
CONSTRUCTION SPECIFICATIONS:
1. THE TOP OF THE EARTH DIKE OVER THE INLET PIPE AND THOSE
DIKES CARRYING WATER TO THE PIPE SHALL BE AT LEAST 1.5 FEET
HIGHER AT ALL POINTS THAN THE TOP OF THE INLET PIPE.
2. THE PIPE SHALL BE FLEXIBLE WITH WATER TIGHT CONNECTING
BANDS. FLEXIBLE PIPE SHOULD BE STAKED ON EITHER SIDE.
3. A RIP RAP APRON SHALL BE PROVIDED AT THE OUTLET, IF
EMPTYING INTO A DISTURBED AREA.
PVC END CAP
PVC T
GENERAL NOTES:
SEDIMENT PIT
NOT REQUIRED IF BASIN
IS LOCATED DOWNSTREAM
OF PIPE OUTLET.
4. THE SOIL AROUND AND UNDER THE INLET PIPE AND ENTRANCE
SECTION SHALL BE HAND TAMPED IN 4" LIFTS TO THE TOP OF
THE EARTH DIKE.
5. FOLLOW-UP INSPECTION AND ANY NEEDED MAINTENANCE SHALL
BE PERFORMED AFTER EACH STORM BY THE FINANCIALLY RESPONSIBLE
PARTY OR HIS AGENT.
6. OUTLET PIPE SHOULD BE TAKEN OVER OR THROUGH ANY SILT FENCE,
TAKING CARE NOT TO VOID THE EFFECTIVENESS OF THE SILT FENCE.
OR METAL POST
SKIMMER
FAIRCLOTH SKIMMER OR EQUIVALENT DEWATERING DEVICE
PERSPECTIVE VIEW
"C" ENCLOSURE
VATER ENTRY UNIT
Storm Water Culverts
Pipe
Pipe Invert
Slope
Diameter
New Pipe
Outlet
Length
Slope
Elevation
Drain ID
(inch)
Material
Elevation
(ft)
(ft/ft)
(ft)
(ft)
SD-1
48
HDPE
510
508
157
0.02
SD-2
54
HDPE
512
510
90
0.02
SD-3
36
HDPE
528.5
510
207
0.09
SD-4
18
HDPE
524
510
100
0.14
SD-5
36
HDPE
529
510
150
0.13
SD-6
18
HDPE
1 526
512
70
1 0.20
SD-7
18
HDPE
526
510
70
0.23
1 SLOPE DRAIN
2 N.T.S.
EMERGENCY SPILLWAY
x
x
DNR C999.001.012
2' X 3X 2' DEEP PRECAST CONCRETE
Z X 3X 2' DEEP PRECAST CONCRETE DROP INLET (SEE NOTE 1) 18" DIA. CORRUGATED DUAL WALL
DROP INLET (SEE NOTE 1) HDPE PIPES (ADS N-12 WT OR APPROVED
EQUIVALENT)
2-
2-
A.'
NOTES:
1. INSTALL PRECAST CONCRETE DROP INLET AND GRATES IN ACCORDANCE WITH NCDOT SPECIFICATIONS.
2. DROP INLET DIMENSIONS MAY BE OPTIMIZED FOR FIELD CONDITIONS.
,8" DIA. CORRUGATED DUAL WALL
HDPE PIPES (ADS N-12 WT OR APPROVED
EQUIVALENT)
PRECAST CONCRETE DROP INLET
V=2'
Sediment Basin Dimensions
Primary Spillway Design
Emergency Spillway Design
Skimmer
Concrete Anti-
Barrel Inlet
Spillway
Top
Riser Height
Basin Depth
Riser Crest
Barrel
Barrel Discharge
Emergency Spillway
Berm Crest
Emergency Spillway
Orifice
Flotation Block
Invert
Depth
Width
Basin
{H}
{Z}
Elevation
Riser Material
Barrel Material
Length
Invert Elevation
Invert
Elevation
Length
Diameter
Dimensions
Elevation
{T}
{W}
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(in)
(ft)
(ft)
(ft)
(ft)
SB-1
2.5
10.5
552
36-inch dia. CMP
6
5'x5'x1.5'
24" Dia. HDPE
499.5
101
496
508
510
2
15
10
SB-2
2.5
10.5
552
36-inch dia. CMP
6
5'x5'x1.5'
24" Dia. HDPE
499.5
116
496
508
510
2
15
10
SB-3
2.5
10.5
552
36-inch dia. CMP
6
5'x5'x1.5'
24" Dia. HDPE
499.5
87
496
508
510
2
15
10
SB-4
2.5
10.5
552
EXISTING
6
Existing
EXISTING
499.5
105
495
508
510
2
15
10
T -1-RA SB-4 RISER AND BARREL WILL USE IN PLACE NPDES OUTLET STRUCTURE
IDE OF SEDIMENT E
'I LLWAY
D
i]
FAIRCLOTH SKIMMER
TRASH RACK
OR EQUIVALENT
PRIMARY SPILLWAY
DEWATERING DEVICE
(RISER)
61M//V
CLEAN OUT STAKE
1/3 H
TOP OF EMBANKMENT
FREEBOARD V MIN.
z
H
V MIN.
w�
V MIN.
SCHEDULE 40=°'•r'�'
PVC ELBOW PVC VENT ';'�','<e• :;•ry ,':
PVC PIPE CLASS B STONE PAD
PIPE
(4' X 4' X 1MIN.)
WATER SURFACE -0
ANTI -FLOTATION DEVICE
FF
'VC END CAP (SIZE VAR.) SECTIONAL VIEW TRENCH
2' DEEP
IPE
ALES IN
RSIDE
ORIFICE
PLATE
FLEXIBLE SCHEDULE 40 CLASS B STONE PAD
HOSE PVC PIPE (4' X 4' X 1' MIN.)
INSPECTION AND MAINTENANCE NOTES:
1. ALL SEDIMENT AND EROSION CONTROL DEVICES AND PLANTED AREAS SHALL BE INSPECTED EVERY SEVEN (7)
CALENDAR DAYS AND AFTER EACH RAINFALL OCCURRENCE THAT EXCEEDS ONE-HALF (1/2) INCH WITHIN A 24-HOUR
PERIOD. DAMAGED OR INEFFECTIVE DEVICES SHALL BE REPAIRED OR REPLACED, AS NECESSARY, AS SOON AS
PRACTICAL.
2. REMOVE ACCUMULATED SEDIMENT WHEN IT REACHES 1/3 THE HEIGHT OF THE DEVICE.
3. REMOVED SEDIMENT SHALL BE PLACED IN STOCKPILE STORAGE AREAS OR SPREAD THINLY ACROSS DISTURBED AREA.
STABILIZE THE REMOVED SEDIMENT AFTER IT IS RELOCATED.
4. REMOVE TEMPORARY E&SC MEASURES UPON STABILIZATION OF THE TRIBUTARY DRAINAGE AREA. REMOVE ALL
CONSTRUCTION MATERIAL AND SEDIMENT, AND DISPOSE OF THEM PROPERLY. GRADE THE DISTURBED AREA TO DRAIN
AND STABILIZE ACCORDINGLY.
1. SEDIMENT BASIN SHALL BE INSTALLED TO THE GENERAL GRADES AND LOCATION SHOWN ON THE DRAWINGS.
2. SEDIMENT BASINS SHALL BE INSTALLED AND MAINTAINED PER THE NCDEQ "EROSION AND SEDIMENT CONTROL PLANNING AND DESIGN MANUAL".
3. ALL SEDIMENT BASINS SHALL INCLUDE POROUS BAFFLES PER THE DRAWINGS AND INSTALLED PER NCDEQ REQUIREMENTS.
2 SEDIMENT BASIN
2 N.T.S.
0 12/9/2016 7810-14-0065 DAM DECOMISSIONING CSJ CSJ AAJ CHR CHR
REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD
INCHES 1 2 3 TENTHS 10 20 30 4 5 6
dotted By: Jordan, Chris Sheet Set: Dan River ABC Design Dam Decommissioning Layout: DNRC999.001.012 GENERAL DETAILS 2 December 09, 2016 12: 47: 12pm Q: ADuke\DanRiver\7810140065absat don river off site If\plansheets\abc design\DNRC999.001.012 GENERAL DETAILS 2.dwg
7
SUBMITTED FOR PERMIT APPROVAL
DESCRIPTION
TZ
I
0
0
EXISTING DAM EMBANKMENT MATERIAL.
Q
T IF CCR MATERIAL IS OBSERVED WITHIN
THE EMBANKMENT, REMOVE THE
CCR-IMPACTED SOIL AND REPLACE WITH
N
CLEAN SOIL FILL
ANTI -SEEP
COLLAR
Environment &
.
Infrastructure
2801YORKMONTROAD
amrf
SUITE 100
CHARLOTTE, INC 28208
foster
TEL: [phone]
FAX: [phone]
wheeler
LICENSURE:
INC ENG: F-1253
INC GEOLOGY: C-247
SEAL
NOT FOR
CONSTRUCTION
TITLE
BARREL PIPE
(SIZE VAR.)
RIPRAP ENERGY DISSIPATOR
DAM DECOMMISSIONING PLAN
DAN RIVER STEAM STATION
GENERAL DETAILS 2
FOR
PERMIT APROVAL - NOT FOR CONSTRUCTION
DUKE
ENEnf'**%/®
SCALE: AS SHOWN
DES:
CSJ
DWG TYPE: DWG
DFTR :
CSJ
JOB 0065
DATTE:012/9/2016
ENGR:
CHR
FILENAME:
DNR_C999.001.012 GENERAL DETAILS 2.dwg
APPD:
CHR
DWG SIZE
DRAWING NO.
REVISION
ANSI
22"x34"
DNR C999.001.012
0
9 10
FT,
<
0
F

REV.
DNR C999.001.013 IREV. 0
3.0' VARIES 3.0'
EXISTING GRADE �p 1.5' �p
3.0'
3-FT. X 3-FT. X 9-FT. LONG
GABION BASKET n n�n C n
18-IN. THICK GABION MATTRESS
6-IN. NCDOT NO. 57 STONE CUSHION LAYER
8 OZ/SY NON -WOVEN GE
MIRAFI 50OX WOVEN GEOTEXTILE
(OR ENGINEER -APPROVED ALTERNATE)
TYPICAL GABION OUTLET SECTION
Gabion Mattress Dimensions
Bottom
Longitudinal
MIN. Depth
Left Side
Right Side
Top Width
Upstream
Downstream
Length
Gabion
Width
Slope
(III
Slope
Slope
{T}
Invert
Invert
{L}
ID
{b}
{S}
(ft)
{Z,H:V}
{Z21I
(ft)
(ft)
(ft)
(ft)
(ft)
(ft/ft)
G-1
15
1.5
0
0
15
497.0
480
38
0.447
G-2
21
2
0
0
21
496.0
480
33
0.485
G-3
21
1.5
0
0
21
497.0
480
27
0.630
G-4
15
2
0
0
15
495.0
480
15
1.000
PROJECTED TOP OF
GABION BASKETS
NOTES:
1. UNLESS DIRECTLY IN CONFLICT WITH REQUIREMENTS SET FORTH IN THE PROJECT NOTES AND DRAWINGS, GABIONS SHALL BE ASSEMBLED PER THE MANUFACTURER'S RECOMMENDATIONS.
2. GABIONS SHALL BE COMPRISED OF DOUBLE TWISTED HEXAGONAL ZINC COATED WIRE MESH WITH POLYVINYL CHLORIDE (PVC) COATING CONFORMING TO THE FOLLOWING REQUIREMENTS:
a. THE MESH WIRE SHALL HAVE A CROSS SECTIONAL CORE DIAMETER OF A MINIMUM OF 0.1063 INCHES WITH AN OUTER CROSS SECTIONAL DIAMETER OF A MINIMUM OF 0.1496 INCHES.
I THE SELVEDGE WIRE SHALL HAVE A CROSS SECTIONAL INTERNAL DIAMETER OF 0.134 INCHES AND AN EXTERNAL CROSS SECTIONAL DIAMETER OF 0.174 INCHES.
c. PVC COATING SHALL HAVE A MINIMUM THICKNESS OF 0.015 INCHES. ABRASION RESISTANCE OF PVC COATING SHALL BE LESS THAN 12% WEIGHT LOSS IN ACCORDANCE WITH ASTM D1242
AND A PROJECTED DURABILITY LIFE OF 70 YEARS WHEN TESTED IN ACCORDANCE WITH UL 746B.
d. GABION MESH SHALL BE A MESH TYPE 8 X 10 WITH NOMINAL SIZE OF 3 Y4 " BY 4 Y2".
3. THE CONTRACTOR SHALL TAKE CARE NOT TO DAMAGE THE PVC COATING DURING ASSEMBLY, TRANSPORTATION, PLACEMENT, AND FILLING. THE OWNER RESERVES THE RIGHT TO REJECT
GABIONS WHICH HAVE BEEN DAMAGED PRIOR TO FINAL ACCEPTANCE OF THE WORK.
4. GABIONS MAY BE ASSEMBLED USING PVC COATED LACING WIRE PER THE MANUFACTURER'S RECOMMENDATIONS, USING ALTERNATING SINGLE AND DOUBLE LOOPS THROUGH EVERY MESH
OPENING WITH DOUBLE LOOPS SPACED AT NO MORE THAN 6 INCHES.
5. INDIVIDUAL GABION UNITS SHALL BE CONNECTED USING STAINLESS STEEL FASTENERS SPACED AT A MAXIMUM OF EVERY 4 INCHES. STAINLESS STEEL FASTENERS SHALL BE CLOSED USING A
PNEUMATIC TOOL PER THE MANUFACTURER'S RECOMMENDATIONS. STAINLESS STEEL FASTENERS SHALL HAVE A CROSS SECTIONAL DIAMETER OF 0.120 INCHES. WHEN CLOSED, THE
FASTENER SHOULD HAVE A NOMINAL OVERLAP OF 1 INCH. GABION UNITS SHALL BE SECURED ALONG ALL VERTICAL AND TOP EDGES. FOR STACKED UNITS, THE UPPER AND LOWER BASKETS
SHALL BE CONNECTED WITH FASTENERS ALONG FRONT AND BACK EDGES.
6. GABIONS SHALL BE FILLED WITH SOUND RIP RAP WITH A MINIMUM SIZE OF 4 INCHES AND A MAXIMUM SIZE OF 8 INCHES. RIP RAP SHALL MEET THE REQUIREMENTS OF SECTION 1042 RIP RAP
MATERIALS OF THE 2012 NORTH CAROLINA DEPARTMENT OF TRANSPORTATION (NCDOT) STANDARD SPECIFICATIONS FOR ROADS AND STRUCTURES. ALTERNATE GRADATIONS MAY BE
SUBMITTED FOR USE BUT SHALL NOT BE USED PRIOR TO APPROVAL BY THE ENGINEER
7. GABIONS SHALL BE FILLED IN THREE EQUAL LAYERS TOTALING THE HEIGHT OF EACH GABION. SOME MANUAL PLACEMENT OF ROCKS TO REDUCE EXCESSIVE VOIDS WILL BE REQUIRED.
GABIONS SHALL BE OVERFILLED BY APPROXIMATELY 1 TO 2 INCHES SUCH THAT LIDS MUST BE STRETCHED FOR CLOSURE. A LID CLOSURE TOOL SHALL BE USED PER THE MANUFACTURER'S
RECOMMENDATIONS TO CLOSE LIDS.
8. WHEN PLACED LATERALLY, GABIONS SHALL BE LAID TRANSVERSELY TO THE DIRECTION OF THE WATER FLOW.
9. WHEN PLACED, GABIONS SHALL BE IN INTIMATE CONTACT WITH BEDDING AGGREGATE.
10. BEDDING MATERIAL FOR GABIONS SHALL BE COMPRISED OF AGGREGATE MEETING THE GRADATION REQUIREMENTS ON TABLE 1005-1 FOR NCDOT # 57 AGGREGATE AND SECTION 1014 OF
THE 2012 NCDOT STANDARD SPECIFICATIONS FOR ROADS AND STRUCTURES.
11. WOVEN GEOTEXTILE SHALL CONSIST OF POLYPROPYLENE YARNS AND BE RESISTANT TO BIOLOGICAL DEGRADATION AND NATURALLY OCCURRING CHEMICALS, ALKALI, AND ACIDS. WOVEN
GEOTEXTILE SHALL MEET THE FOLLOWING MINIMUM REQUIREMENTS:
PHYSICAL PROPERTY (TEST METHOD) TEST VALUE
GRAB TENSILE STRENGTH (ASTM 1 200 LBS
GRAB TENSILE ELONGATION (ASTM 1 10%
TRAPEZOIDAL TEAR STRENGTH (ASTM 1 75 LBS
UV RESISTANCE (500 HOURS) (ASTM 1 70% STRENGTH RETENTION
APPARENT OPENING SIZE (ASTM 1 0.43 MM
CBR PUNCTURE STRENGTH (ASTM 1 700 LBS
F
ri_"
RIPRAP GABION DETAIL
�2J13V. - 4,
ROCK RIPRAP
d50 = VARIES
\�, \�, \�, \�, \�, �11
8 OZ/SY NON -WOVEN GEOTEXTILE
ROCK RIP -RAP
=R WATER
AT TIME OF
UCTION
3 GRADE
GENERAL NOTES:
1. RIPRAP ENERGY DISSIPATERS SHALL BE INSTALLED TO THE GENERAL
DIMENSIONS AND LOCATION SHOWN ON THE DRAWINGS AND AS NEEDED
BASED ON FIELD CONDITIONS.
2. ENSURE THAT THE SUBGRADE FOR THE FILTER AND RIPRAP FOLLOWS THE
REQUIRED LINES AND GRADES SHOWN IN THE PLAN. COMPACT ANY FILL
REQUIRED IN THE SUBGRADE TO THE DENSITY OF THE SURROUNDING
DISTURBED MATERIAL. LOW AREAS IN THE SUBGRADE ON UNDISTURBED SOIL
MAY ALSO BE FILLED BY INCREASING THE RIPRAP THICKNESS.
3. THE RIPRAP AND GRAVEL FILTER MUST CONFORM TO THE SPECIFIED
GRADING LIMITS SHOWN ON THE PLANS.
W 4. FILTER CLOTH, WHEN USED, MUST MEET DESIGN REQUIREMENTS AND BE
PROPERLY PROTECTED FROM PUNCHING OR TEARING DURING INSTALLATION.
REPAIR ANY DAMAGE BY REMOVING THE RIPRAP AND PLACING ANOTHER
PIECE OF FILTER CLOTH OVER THE DAMAGED AREA. ALL CONNECTING
JOINTS SHOULD OVERLAP A MINIMUM OF 1 FT. IF THE DAMAGE IS EXTENSIVE,
REPLACE THE ENTIRE FILTER CLOTH.
5. RIPRAP MAY BE PLACED BY EQUIPMENT, BUT TAKE CARE TO AVOID DAMAGING
THE FILTER.
6. THE MINIMUM THICKNESS OF THE RIPRAP SHOULD BE 1.5 TIMES THE MAXIMUM
STONE DIAMETER.
7. RIPRAP MAY BE FIELD STONE OR ROUGH QUARRY STONE. IT SHOULD BE
HARD, ANGULAR, HIGHLY WEATHER -RESISTANT AND WELL GRADED.
8. CONSTRUCT THE APRON ON ZERO GRADE WITH NO OVERFALL AT THE END.
MAKE THE TOP OF THE RIPRAP AT THE DOWNSTREAM END LEVEL WITH THE
RECEIVING AREA OR SLIGHTLY BELOW IT.
9. ENSURE THAT THE APRON IS PROPERLY ALIGNED WITH THE RECEIVING
STEAM AND PREFERABLY STRAIGHT THROUGHOUT ITS LENGTH. IF A CURVE
IS NEEDED TO FIT SITE CONDITIONS, PLACE IN THE UPPER SECTION OF THE
APRON.
T
Riprap Energy Dissipater Dimensions
MinimumUpstream
Maximum
Downstream
Diameter
Minimum Riprap Size
Selected
Apron
Apron
Dissipater
Tailwater
Discharge
Riprap Size
Apron
Apron Width
Outlet ID
{Do}
{dso}
Riprap
Thickness
Length
ID
Condition
(cfs)
{dmax}
Width
{W}
(in)
(in)
Class
(in)
{ll
(in)
(ft)
(ft)
(ft)
SD-4
RD-1
minimum
12.2
18
7.2
B
10.8
16.2
16
4.5
17.5
SD-5, SD-6
RD-2
minimum
16.6
36
7.2
B
10.8
16.2
20
9
12
SD-7
RD-3
minimum
4.2
18
4.8
B
7.2
10.8
12
4.5
13.5
0 12/9/2016 7810-14-0065 DAM DECOMISSIONING CSJ CSJ AAJ CHR CHR SUBMITTED FOR PERMIT APPROVAL
REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD DESCRIPTION
INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7
I I I I
dotted By: Jordan, Chris Sheet Set: Dan River ABC Desiqn Dam Decommissioning Layout: DNRC999.001.013 GENERAL DETAILS 3 December 09, 2016 03: 44: 07pm Q: ADuke\DanRiver\7810140065absat don river off site If\plansheets\abc design\DNRC999.001.013 GENERAL DETAILS 3.dwg
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RIPRAP DISSIPATOR DETAIL
013 N.T.S.
Environment &
Infrastructure
.A_
!0
2801 RKM ROAD
1
amec
SUITE 1ONT
SUITE 00
CHARLOTTE, NC 28208
foster
TEL: [phone]
FAX: [phone]
wheeler
LICENSURE:
NC ENG: F-1253
NC GEOLOGY: C-247
SEAL
NOT FOR
CONSTRUCTION
TITLE
DAM DECOMMISSIONING PLAN
DAN RIVER STEAM STATION
GENERAL DETAILS 3
FOR
PERMIT APPROVAL - NOT FOR CONSTRUCTION
DUKE
ENEnf'**%/'
SCALE: AS SHOWN
DES:
CSJ
DWG TYPE: DWG
DFTR :
CSJ
JOB 0065
DATTE:012/9/2016
El
CHR
FILENAME:
DNR_C999.001.013 GENERAL DETAILS 3.dwg
APPD:
CHR
DWG SIZE
DRAWING NO.
REVISION
ANSI
22"x34"
DNR C999.001.013
0
0
9
0
TZ
I
0
0
0
W
m
0
F
9 10

DNR C999.001.014
REV. 0
F
DEFINITION
Controlling runoff and erosion on disturbed areas by establishing perennial vegetative : cover with seed.
To reduce erosion and decrease sediment yield from disturbed areas, and to permanently stabilize such areas in a manner that is
economical, adapts to site conditions, and allows selection of the most appropriate plant materials.
SPECIFICATIONS
SEEDBED REQUIREMENTS
Establishment of vegetation should not be attempted on sites that are unsuitable due to excessive soil compaction, inappropriate soil
texture, poor drainage, concentrated overland flow, or steepness of slope until measures have been taken to correct these problems
To maintain a good stand of vegetation, the soil must meet certain minimum requirements as a growth medium. The existing soil
should have these criteria:
• Enough fine-grained (silt and clay) material to maintain adequate moisture and nutrient supply (available water capacity of at
least .05 inches water to 1 inch of soil).
• Sufficient pore space to permit root penetration.
• Sufficient depth of soil to provide an adequate root zone. The depth to rock or impermeable layers such as hardpans should be
12 inches or more, except on slopes steeper than 2:1 where the addition of soil is not feasible.
• A favorable pH range for plant growth, usually 6.0 - 6.5.
• Free from large roots, branches, stones, large clods of earth, or trash of any kind. Clods and stones may be left on slopes
steeper than 3:1 if they are to be hydro seeded.
If any of the above criteria are not met - i.e., if existing soil is too coarse, dense, shallow or acidic to foster vegetation - special
amendments are required. The soil conditioners described below may be beneficial or, preferably, topsoil may be applied.
SEEDBED PREPARATION
Install necessary mechanical erosion and sedimentation control practices before seeding, and complete grading according to the
approved plan.
Lime and fertilizer needs should be determined by soil tests. Directions, sample cartons, and information sheets are available through
county Agricultural Extension offices. Testing is also done by commercial laboratories.
When soil tests results are not available, follow rates suggested in the seeding specifications shown at right. Application rates usually
fall into the following ranges:
• Ground agricultural limestone: Light -textured, sandy soils: 1 to 1-1/2 tons/acre
Heavy -textured, clayey soils: 2-3 tons/acre
• Fertilizer: Grasses: 800-1200 lb/acre of 10-10-10 (or the
equivalent) Grass -legume mixtures: 800-1200 lb/acre of 5-10-10 (or the equivalent)
Apply lime and fertilizer evenly and incorporate into the top 4-6 inches of soil by disking or other suitable means. Operate machinery
on the contour. When using a hydro seeder, apply lime and fertilizer to a rough, loose surface.
Roughen surfaces prior to seeding.
Complete seedbed preparation by breaking up large clods and raking into a smooth, uniform surface (slopes less than 3:1). Fill in or
level depressions that can collect water. Broadcast seed into a freshly loosened seedbed that has not been sealed by rainfall.
SEEDING
Seeding dates given in the seeding mixture specifications are designated as "best" or "possible". Seedings properly carried out within
the "best" dates have a high probability of success. It is also possible to have satisfactory establishment when seeding outside these
dates. However, as you deviate from them, the probability of failure increases rapidly. Seeding on the last date shown under
"possible" may reduce changes of success by 30-50%. Always take this into account in scheduling land -disturbing activities.
Use certified seed for permanent seeding whenever possible.
Labeling of non -certified seed is also required by law. Labels contain important information on seed purity, germination, and presence
of wood seeds. Seeds must meet State standards for content of noxious weeds. Do no accept seed containing "prohibited" noxious
weed seed.
Inoculate legume seed with the Rhizobium bacteria appropriate to the species of legume.
Apply seed uniformly with a cyclone seeder, drop -type spreader, drill, cultipacker seeder, or hydro seeder on a firm, friable seedbed
When using a drill or cultipacker seeder, plant small grains no more than 1 inch deep, grasses and legumes no more than 1/2 inch.
Equipment should be calibrated in the field for the desired seeding rate.
HYDRO SEEDING
Surface roughening is particularly important when hydro seeding, as a roughened slope will provide some natural coverage for lime,
fertilizer, and seed. The surface should not be compacted or smooth. Fine seedbed preparation is not necessary for hydro seeding
operations: large clods, stones, and irregularities provide cavities in which seeds can lodge.
Rate of wood fiber (cellulose) application should be at least 2,000 lb/acre.
Apply legume inoculants at four times the recommended rate when adding inoculant to a hydro seeder slurry.
If a machinery breakdown of 1 /2 to 2 hours occurs, add 50% more seed to the tank, based on the proportion of the slurry remaining.
This should compensate for damage to seed. Beyond 2 hours, a full rate of new seed may be necessary.
Lime is not normally applied with a hydraulic seeder because it is abrasive. It can be blown onto steep slopes in dry form
MAINTENANCE
Generally, a stand of vegetation cannot be determined to be fully established until soil cover has been maintained for one full year
from planting. Inspect seeded areas for failure and make necessary repairs and reseedings within the same season, if possible.
Reseeding --If a stand has inadequate cover, re-evaluate choice of plant materials and quantities of lime and fertilizer. Re-establish
the stand after seedbed preparation or over- seed the stand. Consider seeding temporary, annual species if the time of year is not
appropriate for permanent seeding.
If vegetation fails to grow, soil must be tested to determine if acidity or nutrient imbalance is responsible.
Fertilization --On the typical disturbed site, full establishment usually requires re -fertilization in the second growing season. Fine turf
requires annual maintenance fertilization. Use soil tests if possible or follow the guidelines given for the specific seeding mixture.
TEMPORARY SEEDING SPECIFICATIONS
Nurse plants
Between May 1 and Aug. 15, add 10 lb/acre German millet (Setariaitaiica) or 15 lb/acre Sudan grass. Prior to May 1 or after Aug.
15, add 40lb/acre Rye Grain (Festucaanindinacea).
Seeding dates
Fall:
Late winter:
Best
Aug. 25 - Sept. 15
Feb. 15 - Mar. 21
Possible
Aug. 20 - Oct. 25
Feb. 1 -Apr. 15
Apply lime and fertilizer according to soil tests, or apply 4,000 lb/acre ground agricultural limestone and 1,000 lb/acre 10-10-10
fertilizer.
Mulch
Apply 4,000-5,000 lb/acre grain straw or equivalent cover of another suitable mulching material. Anchor mulch by tacking with asphalt,
roving, or netting. Netting is the preferred anchoring method on steep slopes.
Maintenance
Re -fertilize in the second year unless growth is fully adequate. May be mowed once or twice a year, but mowing is not necessary.
Reseed, fertilize, and mulch damaged areas immediately.
Pursuant to G.S. 113A-57(3), provisions for permanent groundcover sufficient to restrain erosion must be accomplished for all
disturbed areas within 14 working days.
B
Seeding mixture (fall)
'REF: 6.11 L NC Erosion and Sediment Control Planning and Design Manual, 2006
Species*
Rate (lb/acre)
Rye Grain (Secaie cereaie)
120
Seeding Mixture (late winter early spring)
Species*
Rate (lb/acre)
Rye Grain (Secaie cereaie)
120
Seeding mixture (summer)
Species*
Rate (lb/acre)
German Millet (Setariaitaiica)
40
Seeding dates (Piedmont)
Fall: Aug. 15 - Dec. 30
Late winter (early spring): Jan. 1 - May 1 Late
Summer: May 1 - Aug. 15
Soil amendments
Follow recommendations of soil tests or apply 2,000 lb/acre ground agricultural limestone and 750 lb/acre 10-10-10 fertilizer.
Mulch
Apply 4,000 lb/acre straw. Anchor mulch by tacking with asphalt, roving or a mulch anchoring tool. A disk with blades set nearly
straight can be used as a mulch anchoring. tool.
Maintenance
Re -fertilize if growth is not fully adequate. Reseed, re -fertilize and mulch immediately following erosion or other damage.
Pursuant to G.S. 113A-57(2), the angle for graded slopes and fills shall be no greater than the angle that can be retained by
vegetative cover or other adequate erosion -control devices or structures. In any event, 3H:1 V or greater slopes left exposed will,
within 7 calendar days of completion of any phase of grading, be planted or otherwise provided with temporary or permanent ground
cover, devices, or structures sufficient to restrain erosion.
Pursuant to G.S. 113A-57(3), provisions for permanent groundcover sufficient to restrain erosion must be accomplished for all
disturbed areas within 14 working days following completion of construction or development.
*REF: 6.10 A,B and C, NC Erosion and Sediment Control Planning and Design Manual, 2006
PERMANENT SEEDING SPECIFICATIONS
Seedina mixture
When using broadcast -seeding methods, subdivide the area into workable sections and determine the amount of seed needed for Species* Rate (lb/acre)
each section. Apply one-half the seed while moving back and forth across the area, making a uniform pattern: then apply the second Tall fescue (Festuca anindinacea) (Grass lined Channels) 200
half in the same way, but moving at right angles to the first pass. Tall fescue (Festucaalundinacea) (Other Areas) 100
Mulch all plantings immediately after seeding.
NPDES Stormwater Discharge Permit for Construction Activities (NCG01)
NCDENR/Division of Energy, Mineral and Land Resources
STABILIZATION TIMEFRAMES
Effective Aug. 3, 2011)
SITE AREA DESCRIPTION
STABILIZATION
TIMEFRAME EXCEPTIONS
l Perimeter dikes, swales, ditches, slopes
7 days
None
=_ High Quality Water (HQW) Zones
7 days
None
Slopes steeper than 3:1
7 days
If slopes are 10' or less in length and are
not steeper than 2:1, 14 days are allowed.
Slopes 3:1 or flatter
14 days
7 days for slopes greater than 50' in length.
All other areas with slopes flatter than 4:1
14 days
None, except for perimeters and HQW Zones.
Environment &
Infrastructure
�I
2801YORKMONTROAD
amec
SUITE 100
CHARLOTTE, NC 28208
foster
TEL: [phone]
FAX: [phone]
wheeler
LICENSURE:
NC ENG: F-1253
NC GEOLOGY: C-247
SEAL
NOT FOR
CONSTRUCTION
TITLE
DAM DECOMMISSIONING PLAN
DAN RIVER STEAM STATION
GENERAL DETAILS 4
FOR
PERMIT APROVAL - NOT FOR CONSTRUCTION
SCALE: AS SHOWN DES: CSJ
DUKE
DWG TYPE: DWG DFTR : CSJ
JOB
ENEnf'**%/' DATTE:012/9/2016 0065 ENGR: CHR
FILENAME: DNR_C999.001.014 GENERAL DETAILS 4.dwg APPD: CHR
DWG SIZE DRAWING NO. REVISION
TZ
I
0
0
0
FT,
0
F
0 12/9/2016 7810-14-0065 DAM DECOMISSIONING CSJ CSJ AAJ CHR CHR SUBMITTED FOR PERMIT APPROVAL
REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD DESCRIPTION
INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7
1 1
Plotted By: Jordan, Chris Sheet Set: Dan River ABC Design Dam Decommissioning Layout: DNR C999.001.014 GENERAL DETAILS 4 December 09, 2016 12: 48: 03pm Q: \Duke\DanRiver\7810140065 closet can river off site If\plansheets\abc design \DNR C999.001.014 GENERAL DETAILS 4.dwg
'. 22x DNR C999.001.014 0
34"
9 10