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HomeMy WebLinkAboutNC0003468_SARP_Rev0_Appendix C_20161201Amec 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 REV. 0 F ra Ln x eve �d � Me3dow °� GoX St �n o w. 0 3 c-, `', S a w R n m z d N N MOo%eSt DAM DECOMMISSIONING PLAN DAN RIVER STEAM STATION ROCKI-237 (DAN RIVER PRIMARY ASH BASIN) ROCKI-238 (DAN RIVER SECONDARY ASH BASIN) Gi st 1l a Py e W ELetd of C,4 DC �. �Mao rtd Py ci �Crptt't�a oSharpe Eden � $tad"m O t CP � �00*a, St Oak Hills ' N 9 tSt Goff B x ASH FILL 1 ti Gta� Events Center 10 l� Sa1tSt o LW U) N s tlwY v G � F. Arbor Ln 4 E Harris S� yniock 14 der Dt Guff OUrse O { ra r, ASH FILL 2 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: (704) 357-8600 FAX: (704) 357-8638 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 0 10 DNR C999.001.002 IRIEV. 0 —F MW-2300 Wj3WR S. EDGEWOOD RD. . i" <s% . s'--,�.-:;`.•, _. "� d +yC�w.�?k=3L�?x � xu _ ^�k'�'"-�?` �f�;t _"•o,'YA' ;;�5• < �.%C .. 7. ww¢�� / r w y- i 33` GWA-ss/D m' 0B 463• DUKE ENERGY PROPERTY a GWA-12S/D , O B 453 GWA-1 S/D :r%&;4 S/D OW-419S a f • eP • O -3y11 212_ TP-5 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) ' I OW-409S/D O B-457 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 • GWA-2S/D J TP-17 O B-455 O OW-`+u`}S' _0, OW-405S/D r <. I (ASH) 0 B-320 B-303 - TP-2 (LIMIT OF ASH) /BMW-303BR TP 8 O B�52 OW-413SO OW-303D (LIMIT OF ASH) ♦ -.g j / I TP-19 B-304® AS-12S OW-410S 0-324 / MW-317BR® OW-317D (ASH) O O 62 / I � 0 B-321 - 06316 :': CLOSED LCID LANDFILL k `a ASH FILL 1 AS-6D / tst r► / ' I ! (PERMIT NO.79-B) Y< OW-304D O B-459 OW-302D w ® 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 �AS-8D/BR D 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) \` \ 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 � yui f r . � OW-416 / I• .. \ (ASH) AS-211) RAIL TRACKS All MW-315BRQl B-312 + ♦ e 1 y RAIL TRACKS / eb' r. x ' �� ` (ASH) GWA-10S/D I 1 ; ✓:: �: n��� OW-307D® C-306 GWA-179 s " MW-308BR \ asp a*` •/ /� DPT-306 GWA-4S/D OW-308D OW 323D AB-5S/D GWA-14S/D B-309 C-301 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 VY ti SECONDARY ASH BASIN 0 0 B-327 — — 0 B-1 C-305 AB-30S/D/BR� , \ C-311 \ 1 ; S� / B-3 DI (ROCKI-238-OW08) I(F(OCKI-238-OW09) s r AB-10S/D� 0 B-330 / _ = , MW-314BR® D •• PRIMARY ASH BASIN --- �z 1*'.s �OW-314S/D DAN RIVER STEAM STATION I �''"'' (DECOMMISSIONING IN PROGRESS) ( .;` ,, 0 B-333 i - ►, • ® I (ROfLRI-237-OW10) .R C-308 '� CCI ' MW-311BR f i JI ,�� � 'yam R �.�...,.►. w-�:" ABANDONED WELL ID ' •' " OW-301D OW-409D AS-10D ' 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 0 AMEC FOSTER WHEELER HISTORIC BORING O AMEC FOSTER WHEELER HYDROGEOLOGIC STUDY LANDFILL BORING O ® AMEC FOSTER WHEELER HISTORIC OBSERVATION O WELL O AMEC FOSTER WHEELER HYDROGEOLOGIC STUDY OBSERVATION WELL O AMEC FOSTER WHEELER HYDROGEOLOGIC STUDY O OBSERVATION WELL PAIR N DUKE ENERGY VOLUNTARY WELL PAIR © DUKE ENERGY COMPLIANCE WELL C DUKE ENERGY COMPLIANCE WELL PAIR CPT < HDR, INC. GROUNDWATER ASSESSMENT WELL O HDR, INC. GROUNDWATER ASSESSMENT WELL CLUSTER DPT #:� . 0 B-335 C-307 NOTES: OW-311 D O B-8 / �� 1. LINE INDICATES TEST PIT, DOT INDICATES LIMIT OF ASH IF ENCOUNTERED. _Al It / :; t ti 1Ca. . r ` a "6 . / ' • " ' O B-331 P CCI oe f i- >� y DR-13 (ROCKI-237-OW11) -1 DCp, r a: ---� p�`� DP1 04.. AB-25S/D/BR - a , B-12 C-303 B-310 / DR-15 (ROCKI-237-OW13) TITLE r (rr. -,.� .__.:.. _.__.-___ '#i 6',F+z f�^zf�i.�r'!�I �.�''i - '?' ..""�:.�.,...,: � O -� ,.� . - B-s _ Environment Infrastructure ' L -- B 10 0_ ,• z . �� = DR-14 (ROCKI-237-OW12)® - .. (� jO `�.Y••F ' �""• ' • j.. ; [�' B-11 '�CCR-4S 2801 YORKMONT ROAD ..—..—..—..—..— DPT-303 SUITE100 amec CHARLOTTE, NC 28208 foster GWA6S/D TEL:(704) 357-8600 Ql MW-22BR FAX: (704) 357-8638 wheeler LICENSURE: NC ENG: F-1253 FOR `!�•_..''���`� _ ... �"` "� - ;,:rye �,, ` ." r GWA-20S/D 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. 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REVISION ---- --- —_—_— _ ______-510= ANSI = DNR C999.001.004 0 0 12/9/2016 7810-14-0065 DAM DECOMISSIONING CSJ CSJ AAJ CHR CHR SUBMITTED FOR PERMIT APPROVAL 22"x34" - - REV DATE JOB NO. PROJECT TYPE DES DFTR CHI ENGR APPD DESCRIPTION INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7 8 9 1 0 r9 O F dotted Bv: Jordan, Chris Sheet Set: Dan River ABC Desiqn Dam Decommissioninq Layout: DNR C999.001.004 ASH BASIN EXISTING CONDITIONS December 09, 2016 12: 36: 15pm Q: \Duke\DcnRiver\7810140065cbsct don river off site If\plcnsheets\cbc design\DNRC999.001.004 ASH BASIN EXISTING CONDITIONS.dwq F 2 3 4 5 6 7 8 DNR C999.001.005 IREV. 0 / v LEGEND \\V \\ \ 1 I \\ \ 700 — EXISTING MAJOR CONTOUR (10') [REF. 11 \ \\ \ \ i / / — I /'V V\ \ VA \ x/ / �I �I / i / i/// �I �I \ I� II -' VAA\\\ V � �/--� / EXISTING MINOR CONTOUR (2') [REF. 1] \ \V V A % _ / / / / I / / \ — — — — / \ \ / /��/ xl�fl PROPOSED PUMP PIPES //// / � EXISTING PROPERTY BOUNDARY A \ /• T, VAAVAAV EXISTING 100-YEAR FLOODPLAIN \ \ \ G EXISTING NATURAL GAS PIPELINE /// // / / \ \\\�A \\ \ a \ \ VA\_\ —� / — _�� / ---G----G NATURAL GAS PIPELINE NOT SURVEYED / X EXISTING FENCE j / // VA\VA \\\�A� \ \ \ �� �c� _ �— c i — - ;j _ j '� / / V ' " / A \ _ _ CA _ EXISTING VEGETATION BOUNDARY—° ��j/_�% EXISTING PIPES \ \ V�\ AV\ \ _ + — �� — VV ' / \\\ \ _— x V �/ � G - D/ � III ( � / � 1\/ I // \ �--/� --� // �\ �� / EXISTING RIP RAP— �— / ) r ) \\ �_�� �-��— / / / I I I I / I'(•. .\ III I / / --- / / / \ _ — —/ //' / /// `/// �/ / v�\v �' �\I / // ��� v\���_-- x� —) / � / � ,� / / / � ••7;1 III III /// � � � / — — � / / �—� %//��// .�/� EXISTING WETLAND \V A / % i/ — ✓� /\\ ��I //� / EXISTING STREAM \ \ \ \ moo/ ® AMEC FOSTER WHEELER HISTORIC OBSERVATION WELL HDR, INC. GROUNDWATER ASSESSMENT WELL JII HDR, INC GROUNDWATER ASSESSMENT WELL CLUSTER '� �� j /I \ \ / j ��.. / _ — NOTE 1: PROPOSED FEATURES TO BE CONSTRUCTED UNDER SEPARATE CONTRACT ; ( / / A \ \ \ \\\ \\ \ / / / / \ \ \ \\\ \ 550— / / / — —iceAV THRUST BL CCR- UNDER SEPARATE— // ( \ \ V \ / //�/ A \\\ •/ // / ���\ _ — / / / _ / /_ 530� / 1 — _ A V (UNDER SE ATE CONTRACT) A 5 1 V A\ v �O�B�_=AV/��� V \ SECONDARY ASH BASIN ANTI -FLOTATION COUNTERMEASURES UNDER SEPARATE CONTRACT ow-31 os/D \ [ \ \ �AI \\I ) V _ // A� - \\\ \ A \ \ \11 JI I \\ B 3 OW 309D \VA A VA \�\ �� v v / % �A • A v v / / / �i/ / / / v A \VA v \/ \ � \ y A\\ v /T/ / / l G ��� \ v\ \ �� v v_ A v A� l/ ° // v�\� / / �) :d: '•�,� / / l �i/i/ i / / T� /� \\\ I �>° � I •I: / / �i//i =`� / / / � / �� ) I-� � \ I) �� � v� v vvv v vv )\ v \ �----- —_ ���// /i�//%///� )Il 11 11 / v/ v � � � \\ � / � s V � A •� -/ � /� \�yr — _--, �� � \l � /—L l �� � I I I I/I /�v VvvvV v�, V \7 \ — ���� ��2 �V� v t-` �v l v / Vvy\v vvv v vv v\ i/- _____-- __- GODWIN CD-150 DIESEL PUMP \� _ / / / \ \ \ / // _ — —� // / — _ — — (PROVIDED BY OWNER) f �ii / \ / / — — r� \ \V \ \ 5� — / p // 3p // (UNDER SEPARATE CONTRACT) _� �� �� — / 36" RCP V\ \\ \ \ V \ _ /i / / �' / — �i EXISTING RISER STRUCTURE TO BE Y �o e \ �5 \ / PUMP PAD Ell - 521.5 A A \ \ V / /— // PUMP OFF - 508.5 III �l J f / \ \ / / / /� / / LOWERED TO MAINTAIN FREEBOARg PUMPON-510.5V`� �V A \ V-- / �� ��� J 1 A / AA \ V A VA V \ / —� / /%// / // — / / � _ � J / � � REQUIREMENTS �� A �AA \ \v EXIS r, / / � � C\ / /� // ^ \\� \ io wlrH I s o Es � / � � � I � � \ �1 �� \ \\ N R SEPARATE C NTRACT / ( \ / /i T � �EL/ / \�/ii/ // I� \ v / 111 /i \ c ' / > A V A / / ii//�/// \/�w- 14Sro, B-311 B /� Z/ v / / � l�� / �i/ �/ i/ i// // / 7- PRIMARY ASH BASIN � � 48"CMP �� ���/� /�� =Z�� �/� _ �/� �/ i // /� ///\i/ // l �✓ /� �'`\ \ II \� �� ��' /J/ �� /i / //\/� i���/�_ 11 / 6-INCH DIAMETER HDPE SDR-21 ( / DISCHARGE PIPE / / f — — — INSTALLED AT GRADE. PROVIDE A TEE - — \ — \ V ®� �� MW-31 BR // /%// y • / / WITH A BALL VALVE PROVIDED FOR \ _ / OW-3/11 D FREEZING WEATHER DEWATERING OF THE 5 � — � � / a � � / \ DISCHARGE PIPE. .1 \ / (UNDER SEPARATE CONTRACT) � /` � _ � � � � / `� � � � / _ / / j / /j ❑� / 100 0 100 200 FT TITLE --- �----/— /— — ,—� /— � --/ � � / �/i�/ � Environment _ //// //// / �/ l� \�✓ �� _ _ _ — — — _ — _ /%/ � /i �j DAM DECOMMISSIONING PLAN _ KI 7-OW13) Infrastructure . 2801 YORKMONT ROAD _ — = — — — _ amec DAN RIVER STEAM STATION �1 — — — _ _ — — — — / i� j/ /��i� �/ �j i // SUITE 100 V \ ° � ��� �— — — — — — — — — /i i �� — / �� i / /// CHARLOTTE, NC 28208 foster // - - -, ; ; / .� = ; / // ,/ TEL: (704) 357-8600 ASH BASIN CONDITIONS PRIOR TO CLOSURE /�/ AB-25S/lBR — — —_ _ -- — != _ / — FAX: (704) 357-8638 Wheeler — — —_ — _ -- ice_.. � ��—� LICENSURE: _ _-------- ____—__ //// NCENGF-1253 FOR \ \s�s \ \ \ _ \ — _— -530 �. --.'� _ _=s—== j/— i NC GEOLOGY:C-247 PERMIT APPROVAL - NOT FOR CONSTRUCTION _--_—___---__ SEAL _ — SCALE: AS SHOWN DES: CSJ _ ____-_ UKE DWG TYPE: DWG DFTR CSJ _ __—�_ _ _ _— / — /� i S—_ _ ENERGY® JOB NO: 7810-14-0065Gffii! CHI AAJ _ �_ /_= NOT FOR DATE: 12/9/2016 ENGR: CHR \490� _ — — — CONSTRUCTION FILENAME: DNR_C999.001.005 ASH BASIN CONDITIONS PRIOR TO CLOSURE.CHR 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 SUBMITTED FOR PERMIT APPROVAL REV DATE JOB NO. PROJECT TYPE DES DFTR CHI ENGR APPD DESCRIPTION 5 6 7 8 0: ADuke\DanRiver\7810140065absat don river off site If\plansheets\abc design\DNRC999.001.005 ASH BASIN CONDITIONS PRIOR TO CLOSURE.dwq DWG SIZE DRAWING NO. REVISION ANSI 22"x34" DNR C999.001.005 0 0 9 0 TZ J 0 0 0 0 l ��o r9 0 F INCHES 1 2 3 TENTHS 10 20 30 4 dotted By: Jordan, Chris Sheet Set: Dan River ABC Desiqn Dam Decommissioning Layout: DNRC999.001.005 ASH BASIN CONDITIONS PRIOR TO CLOSURE December 09, 2016 03: 42: 42pm A 10 F REV. 0 2 3 4 5 6 7 8 DNR C999.001.006 TIN DEMOLITION TABLE IDENTIFICATION NO. DESCRIPTION 1 ABOVE GROUND PIPE AND CONCRETE CRADLES 2 HDPE SLUICE PIPES 3 PRIMARY ASH BASIN OUTLET STRUCTURE 4 PRIMARY ASH BASIN OUTLET PIPE 5 SECONDARY ASH BASIN OUTLET STRUCTURE 6 SECONDARY ASH BASIN OUTLET PIPE 7 48-IN. DIA. CMP ——� � /A/l/// �l 11 l � �%��, 'O� �%�� i; �% � � I I� �• vv v�v� v �O' � / ` /� // � _, �' � — / // ��� i��lil — _ �\ Gv 10 / / A �/ // A/ A j/ III I � / \ � � � i � / /A � ,� � — — v A � � � III�III�I• 530 0 � �v v�v J, �//� v vv v \ v• , . 'v ,_/ v � .vvv v max„ ,,/�/� /// v, �, ���/�,�,�_ A v\ V �• v \ \ \ V--- i //i / / /�i v `� // / �_� / // v \ /i \ \❑1 �� J / V A \ \ \ V vim— / / / �_ �/ v A LD v� �� � \O ` /l � v /i v`❑vv O •� _��)�/ A�V�� �--�__,�� � — O O/ //�%/ �-- Off` v �v / ) 1 � / I vvv �v v��\\���, vvv� O v v 4 v/vvv Ov 1 VI I I / ❑ vw v � 11 � I ` / \ v��v ��A \� I III I \� \ \ 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 r�/ 2pz, / j /// / A / AV 1 \ r// /i\ J 1 / VA\ /�� A zxi jj A \ / / /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: (704) 357-8600 DEMOLITION PLAN 530 — _ _ _ _ .�— — — — —� i — �i _ ii i FAX: (704) 357-8638 — — _ — _ — — .. 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: (704) 357-8600 FAX: (704) 357-8638 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: (704) 357-8600 FAX: (704) 357-8638 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: (704) 357-8600 FAX: (704) 357-8638 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: (704) 357-8600 FAX: (704) 357-8638 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: (704) 357-8600 FAX: (704) 357-8638 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 r2_" 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: (704) 357-8600 FAX: (704) 357-8638 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: (704) 357-8600 FAX: (704) 357-8638 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