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Home My WebLink AboutNC0000396_SARP_Rev 0_ Appendix E_20161219Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016 Duke Energy Coal Combustion Residuals Management Program Asheville Steam Electric Generating Plant Site Analysis and Removal Plan Revision 0 Appendix E – Dam Decommissioning and Ash Removal Plan Drawings for the 1982 Ash Basin C- 0 / 0) 0 / L 0 N 00 c 0 N 0) U 0 n 0) 0 O 0 n 0 Q O N O LO O 00 / 0 00 (n U 0 n 0 0 Q U �L Q N N O O N N C 7 f— W W co W 0 0 T 6 J Q z w vi c m 0 0 t _2 ;UFO 1964 ASH BASIN F t', \ \ 1982 ASH BASIN 11 0 t i i NT e "� t �f 349 ` 1/ 4 1l. DECOMMISSIONING AND ASH REMOVAL PLAN 1982 ASH BASIN ASHEVILLE STEAM ELECTRIC GENERATING PLANT l t � Z fn "'ti.. \�� \ • � --ter LOCATION MAP ••• • ••• .••• BUNCOMBE COUNTY, NORTH CAROLINA PREPARED FOR: DUKE ENERGY PROGRESS, LLC arynap� _ rJ a�is\-�a>•I VICINITY MAP SHEET LIST SHEET NUMBER SHEET TITLE C-0.0 COVER SHEET C-1.1 SITE AERIAL C-1.2 EXISTING CONDITIONS / UTILITIES C-1.3 POST ASH REMOVAL GRADES C-1.4 FINAL GRADES C-1.5 PROFILES C-1.6 PROFILES & DETAILS *SUPERCEDED BY NEW EPSC SUBMITTAL ®� ............ o 0419 PERMIT SUBMITTAL CLIENT LOGO: CLIENT: DATUM: PROJECT: DECOMMISSIONING AND ASH REMOVAL PLAN PROJECT NO.: AVD 88 1982 ASH BASIN 7810150250 DUKE ENERGY PROGRESS, LLC PROJECTION ASHEVILLE STEAM ELECTRIC GENERATING PLANT REVISION NO. DUKE BUNCOMBE COUNTY, NORTH CAROLINA STATE PLANE 83 BUNCOMBE COUNTY, NORTH CAROLINA 01 DRAWN BY: TITLE: DATE: ENERGY amec APT DRAWINGGNO16-2016 PRELIMINARY 1 16 06 16 ISSUED FOR PERMIT/UPDATE SHEET TABLE MEW LCW Amec Foster Wheeler Environment &Infrastructure, Inc. REVIEWED BY: NOTFOR CONSTRUCTION 0 14 01 16 ISSUED FOR PERMIT MDB LCW I R .S 2801 YORKMONT ROAD, SUITE 100 foster LCW COVER SHEET - COVER SHEET CHARLOTTE, NC 28208 SCALE: C 0 0 REV D M Y ISSUE/REVISION DESCRIPTION ENG. APPR. TEL: (704) 357-8600 FAX: (704) 357-8638 wheeler AS NOTED LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 �7 E Q 0 T O N CD N C 4u � STILLING BASIN E NOTE: _ 1. PROPERTY BOUNDARY WAS OBTAINED FROM BUNCOMBE COUNTY GIS DATA. s 2. AERIAL PHOTO DATED 10-18-2015 SOURCE BY GOOGLE EARTH PRO. 3. BORING LOCATIONS DETERMINED FROM COORDINATES INCLUDED ON DRILL LOGS. LEGEND J, ASHEVILLE STEAM ELECTRIC 1964 ASH BASIN LIMITS GENERATING PLANT ASH BASIN LIMITS (APPROXIMATE) (APPROXIMATE) COVE AREA aq` a` $ BORE HOLE ' PROPERTY BOUNDARY - 4DIMEN T DISCHARGE - OND (DUCK POND) n,, , �� FGD WETLANDS INTERSTATE 26 -� , o� R, y 1982 ASH BASIN LIMITS 9 (APPROXIMATE) 1964' ASH BASIN DAM LAKE JULIAN —1964 ASH BASIN —� CONCRETE RIM DITCH io s ro, 9 EXISTING ROAD - PROPERTY BOUNDARY -„ <..,: DECANT BASIN / : _ i a r ` u in, , n.. q ws FRENCH BROAD RIVER SEPARATOR DIKE:.,. --1982 ASH BASIN k66 "`<.�£�,y ` ., , � ... ... ,.. .,,,,:. ., ,. mot..-,'i. �,. .;', n .• z xY t§ ' r y"Yrrt is E� , 4 x ' �fi Y i,b e a G. y COVE AREA Elf,r.-,. .r! q , r 82 D ✓^' 1982 ASH BASIN AM L s ��%.. t" „f�v .,>... moo.. a: f� �'• v: a r „ < yam' 4 9� a a F a Q, V 4 q ; < . , < x `l 3. e CLIENT LOGO: CLIENT: DATUM: PROJECT: DECOMMISSIONING AND ASH REMOVAL PLAN PROJECT NO.: uuwap��q NAVD 88 1982 ASH BASIN 7810150250 CqR®,�� DUKE ENERGY PROGRESS, LLC PROJECTION: ASHEVILLE STEAM ELECTRIC GENERATING PLANT REVISION NO. BUNCOMBE COUNTY, NORTH CAROLINA STATE PLANE 83 BUNCOMBE COUNTY, NORTH CAROLINA NA -° M9 3 111��.!Z • W I0e 1 ISSUED FOR PERMIT ISSUE/REVISION DESCRIPTION ENG. IAPPR. Amec Foster Wheeler Environment & Infrastructure, Inc. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL: (704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 amec foster wheeler nN by: TITLE: APT :WED BY: LCW AS NOTED SITE AERIAL 01-14-2016 DRAWING NO. U) 3: 1� 0 Q) . .-t . - - D I C0 C 0 . tl _U C 0 U - V) L'i I � V) 01 C - 3: p � -5 C L, I q) � :3 9) 0 0 � IT �D O-) .16 IN 1i - _U C: 1) Q) 0) U -Y a CL E 0� .� Q) C� N �2 -1 I _lD C 0 a_ Q) .- > cl) _�_ U) <� 0 0 N 0 Ln �D co F_ 1-1 0 E �_ 11 V) _� (D . - n I I- r-) 0 - U I � C . h . �__ � 0- (j) Ln . . L� 4 0 �2 0 N - �D_ 0 E :3 D U� �_ __j �_ D i U) z 0 �_ L� z 0 U 0 z �_ U) x LLJ ; ; :3 0 >1 0 I < 1-1 z . . - T M 0 Q) _C_ Cn LJ V) Q) :2 V� C: . Y 0 i�: 5:1 M _0 (1) � I 0 0- I - - ___ - - N ", I k �, I � \ � I - I , I -- k� . I . � 11 1 -- - . - � � I I ; , 1, V, ,� - -1- I -- 1, 1� 11 i k � . � \ C 1 ,, \l 11, � I __ \\ I " " ,\'Y'' I - I \ . ,, 1. 7 �, - � -_ 11 1"� 1, -1, I I 11 I ; p.- - � - , - ____ 1\ N . , - I , I - --- ---. -_ �', - .1 ---- .. . . - �. �, '. \�\__ , 'I, � .,,', ,11 "I � , , -,-- -- -1- - _ _ -_ I . - j" � i ------ I . 2 ,1 I @ I LEGEND I \ �1� I\ I I 1�, \\\\\) "I "I, 'I, , � , � 1� 1` -_ . - _. _ - I I -_ I - I , -_ � ,'I . I " I- , . - __ � : �, 'l / , , \ . L 1 I � � I , - , - - I - :D ,��_, Ill 11 -if ,` , ____ , I \\ l , � I � , -1 - � - I I ��li. I � � � % - --- - - 1 I -1 / i,� , � � I " � '11',� , : - - _1� - - - _ _1__ __ .1 I 1 I �, I / _-, 1, -it ji 1� , � . - - < '-_ ., - - - � " � .--- I , _ , __1 (ot I I - .... _n --_j . � - :�, - , . � , I -_ _Ln I I �., - " \,-, - '. I i - -, - ", I I, �, ? "�." Z. . Z� �. � ____� ,� ,_ , 1 � -__u . _411 �, - , - " � � - . - , , / I I �� = -- , - R � - 1, _� , I I 11� - ,.-.. , , , ,� 1 - ---- _',� � �, 1) _� -_ - zl -_ \. - �, - - - - ASH BASIN LIMITS (APPROXIMATE) I � - '' _ I I , � � / _____:7--z_ % - L I �� ,1 I ___� - - "'I".1 ,/ . .. � ? I -----.. �___ .- - -- - ; .. � , . q 11 I " , ____ - . , \ 1, �17j ' , ' � , - � - __ .- I- - I - ,____Wr __ - ___�- _-_-- - -- I R_ ., - - I ., , ", ,__z , I . * . 22222 . / ��,�T�,il , - '� , - / I I I I I \ I I -, , , , �:� 11-1 __ I I � __1_____1 ------- - �_ , I ---- 11 -, - __j , r,I � , , -_ h \ i , - �� I ___ "I �- �_7�.�___ I- -1 - I - , � - - _.__ - _____Pr - 1 11 , , a I V 2 1 1 __ - I .� ___7__� ___,�__ -1 �� \ , \ , _ , _ __1 - - __ I I I i I ''� , �- _- - j - I - - - - - - - PROPERTY LINE . , , I ,� ; l4 I "", , ,_ � I I Lj �,J); I --- "', � � , , / - , -d 1 ,�:7 k, -� - __� - __r'�'. , 1, l I 11 ,$.a "� , � __ - , / _ I I ; 11 � \ i I 9 � I I ? " 1 � �, 1 \ I V \ , I I \' -- , j "'. . I I - ( I I � � - h -� .� I A � I L_ � , 'I'll f I , \ \ \ \ -, � , _�"-X. ,/, � �, ____L_ f - \ ,�., " ,,7, MSD SEWER LINES I�i ,__ F, � � ',' - /, 7�� , . I __._ -- r @ J i I t " I -1, - , ,_ , ,_ � � - ____ ___ I I ) , I , +, -- ---- / /, - i, " , __ X , < _:::: , � �k \ \ �111 , � " � , I'll 1��, / I , - , - - ",z / / I -- ' I - I CRA \\,- , I � i --j, . I q___ -, ,,, / // MSD SEWER LINE ''It �, 11 _ % , �_� - Z, ./ -I----- - 11 , @ L I I �\� �, I-- ! \ � , ll 1: ,� / � 11 I- � I � , - fl I L, j L, 7 -1-ft f _.- - i j, . , � , � � __ , , � - -� - �,� \ �, " k � ��-_--__, , " , . �__ , _, __ ,,,--.- - � , , \ 1� I \ I I �_ - -_ - ; I /,i7l� I 'Ili I \ � V"'A \ I \ ILI I \ - I -1 , I � / � I o I I :__.", I 1, 1-11 ,_ - � _� - EDI , - , - I @ 1 U, / � \ 6 e ,�--- � " ; I— I \ I I �___ - - 1� , I— _�___ �' ' P_ , V Il 1�1 zl;,, * * F4 � f -_I U I rl Y \ , / - I _�` 1964 ASH BASIN LIMITS -� ,?- - . lil, � \ ��:,�, �, � '�', \ 1�1 I --- - ," - _"��, "", I __ i ___� 1_ T- I \ I \\, _,___-- __ I `e)_ - (APPROXIMATE) 1! Fj, I , - \ I - - � - , I I ,�� , i i I I � �� I " !,� � � I \ ,, __ __ - - � - T U i --- � \ " - 1__,��_ �� :7--_ I- ____ __ _� U _.. - LIP-4 "" . " -11 I I � ) Ii ,; I I __:i I I ! I \ "_ ", �,�\�,� \ - \\ - - . , �:� ... ___ - It � , _=�� ` ,[,� r__:_:�Q -� , � 1i NOTES 1) � � � -- - ---- , \�\ : - --- __ __=:::L] - ) , I I I I � � ,----,: __ _4_ __�� --b, ,,, :__ -- 4 , .. , ___ 7__�__::_ _:�__:__ - --l�-7- -7-- - ,�J-j --I - -,I iL --� ' �, . I � .- - - � . I � I 0 , � I � � \ - � �� 15 , I V" f , '� � \ � 1\ . I 1, I 71-, , - - - - I - J U - , ` � - � ,_ - - _� ,\ � "'AN , - �_:`r ... � , :� � - , .� I I 1. I \ - ___ _-) I ------ � - � _-�_ ! i "' - ' , �, � - 'I' , \\ __ ��_;� - 4� _, __ " ', � 1 x /' I I I I I \ 11, .� 11 \ � \ - - - --- , ____ - ]:��_ - _,_,_._____, ,n i n ) � ,,,,,i,,,,,;� ��,-, ,,� - ____ --- - ____:=___ Lj 1 . ASH REMOVAL IS CURRENTLY BEING I x , �, ,�,, __ �- , - / , -, - 2�a�� __ ��; I _ - . 'L ,,, it ? T/ � \ :,_�,��', , \\ , : t I 4l � I , - LjL__ � 4it � I- - , x \ ,\ ,� ,_ \ ___ . - , _ , [ III iiztz - 1 , li ////�(, i " ; , � I , , \ '_,� 'I __ - -,( � " , _�__> _� _:: ____ - I�L-Q___�� - Lj I - ( � -r�,, " 4 --- � 1. / 6 --- 1�� I � "I , \ \ I 11 �_ 'I , =:EE ______J_�� - - � __ ��_ - i I %\_-) . , I . PERFORMED FOR THE 1982 BASIN. SUFFICIENT - - I - _7 \ "". � " - - �\ � ------- ", - __ -, - - ��_ I , _ - - I'\\- / : I ,, - \ \ � )�,\� \ 1�1'\'111,."11 ) \�, � \\, � , �_, , ll� ----------- - 7 - 1 _�:7 - - !:--- T&�-_A-__-_j ( LL 1 V `A=- "__,_� � , , 11 � - , 9 I I I tt \ \ \ I . __ - - � �� - I'll - - � - - - 5 1 li'll I 1-1 - __ _V �) �, __ �\ � '. I - � ! : : ; US _4__�_,_ 47_�_� - --- . lq � STORM CAPACITY IS PROVIDED THROUGH THE \ -1 I '�, ��_ 1\1�11 __ ___ � *1 izl � " , - \ 1 � . _ - - , I � � _1� \1 - _� I \ I - --- ____ 1�__ � ---,- - - - - :, _�_ I - i , --- _ - I .- � ",\, ,�_, I- __ ----==: - , I iiii ;,�� I I , -_ I �_� I I- - , \, 1p � , \ ", � \ " � \ ll , : - __ _Z��, - --- - . ...... I 7 I- ____�_� i 7____ -Z _i� __1'.__ - AVAILABLE STORAGE IN THE BASIN. , , , , � � , \ ", , , ,\��,_ ____ xi �2 , __ I "'\' ! - �_ 1, .- -.--- __ / - ��_�iz:_ ___ ,, I I 11i � �, ., \ \\",\ - - !�'�-P_--�_ z -- - ----- I LAKE �9LIAN I I I . I 1, 11 I �_ - p , � � � - - - . 1, �_ * I � \ , _ e i -, / /' i 1 , � ,� I \ \ V'',, \,', � MH-02 .. ...... .) ' : , --- - I - - 1�______- 1 I I WE.- 2191.5 2. DURING ASH REMOVAL IN THE 1982 ASH BASIN, � " - �_� I �; , I � 1� M\ \ � , , , � ", I / - Tif 1707_� �T �, - _2�� 1 1 , i: / I / I ,�� \ \ \ �, _S1 11 EXISTING FGD DISCHARGE -� ,:- -- 1� � __ " I I il �__411�_�__:7_ ____ 1� 05 . APRIL M10 , , , 1. - -j - � ,,�\- . � � - " � q I ____:i__:_T - " - � TWO WET AREAS HAVE BEEN IDENTIFIED. FLOW ,� �01 '' \ �' - __ � / , ;. - . ��j , , 1 , 1\ I ,, I , - - - ��,�, . , , - ��,, - I � I r , _�:� - _� N, 1� 1 �, I , '' , - �, 77�� \ � " , � , 1- i I X' , �_ __ " n�� -_ "I _�_ - �, "o'' ,11 - __ 1 1 �t � �1\1��'11, \ V �\ I \` �"_._�___�� _::,��' -,. I 1 � �, - 41 // LINE (ABANDONED) -.,- I 11 I t f , X __ - - - 1�, 1'� I - A .- - -1- - � - 11::� , ", -, , 1 .-_� ... 1` " __ -,--.---,, - 11 - I \ /�' FROM THESE WET AREAS WILL BE CONTAINED IN �\� S I . " \' V1111- � I __ :�/i ------- ��- 4z�;-__ 1 \ I - ��1 � � "I I '. I - �� / , I I - I I - I - - � �j�� - � X I I I I � itil - , , I 11, /e-" . _�,� - I I , _� �Wrr . _ - �, 1 k k'! I 11 I . ,,, , , - 1/, - atv - ,,�,,,Ii�/ _ - - 1 \� I- ___ �_, �/, # )��r , . , , �� , \ I I" "------ - , - , ',, , , / � �l �-x 1'� - __ - _�, � .\ , " �, 11, ��,��,, � I ___1____�L_1___ __ � �- _� I I � I 11, , "A i / I �- - z I � UNDERDRAINS OR DITCHES AS SHOWN ON THE 11 I " , ____ , 't _�,i, I . , 'I I,/ � , � "I ,;/111 , ,!�,,� li t "I " ! __ ; ; ,`,/,� ;,�`,,` -, I FOLLOWING DRAWINGS. I ., , , � � i \ � - ,-,- iL I �, �,, ,/. 1 .- _1 - Y I n ( ./ , I , � � lr_ . - - -1 Z' , IIL-. j AI I - I/ I __ , �\, I 0 1, 1\1 1_', / - � - 1i;'1!)c,,T!ij �f _� rl_ ilp� \ . I \ '. _;�, 1� I -->-- x / __,:, I I_ , ;� - i I - , � " """i i , 01 - j �, - . / i"- , '", \\ - - '_�' 1 ,,,,��',,`, ,!� ��,'�' � \ ", , i , ." ,� I ; ,,� .`� I \ . I f ), , � � I , "i! IV 1,� � , , � 1,10 T�Ip, / , I \1 \ , \ 1. � %1 1� I -, � �. . I "/Z' 1��,�.' w.f.- 2135.0, �), �, i - � /! 7,� ___ I �k I I , I . . I-, � � `i'� I I \\a,,�'&' �� I", / / , � � 1, l!"',, �� ' ,� �, I ", , 3. EXISTING TOPOGRAPHY INSIDE LIMITS OF ASH � ��/ - - _. I �.'A,l I I I I i /-,- �� \ I �, 1� , , " I " -- `�` �, "I �. I 1'1� , :j I I - C11 , , , �, � I 11 I � �11 '.1 11 ... ,-", 'I,/ .� � / I _/ I % ,`,.� "I / '' T, ___ -- , \\ , � ` " Z I/ , ' , 5 � ... �_, I 1� I i .� , "': , I EXCAVATION PROVIDED BY McKIM & CREED jj il �1�1 I ; I I /, I'll �?�, I 1'�� I ING 36" HDPE � '1�il-q / It " �- t, , /K�, , Z,- � " -- - �� '! �, , , - \ . DATED 10/30/2015. OUTSIDE THIS BOUNDARY , �. I - , I/ ; l �. �, . ,� -, , / ,, I \ I � X� I ). ,,�- , � S - / , I I - , � I/ I ; - / /, I ,,, I � '� I I PRIMARY SPILL..... ��4 - 1, \ 11, 11 � I 1 ! � -', --'��,�- -� i / I I , /, � ; /)�_/�y "I ll,� - , - _�__ - i / " �/, " : I _ �:;:_ . �� " " , I � �1 ,-" I I �_�,_� " __ ( r ,` :�', I EXISTING TOPOGRAPHY PROVIDED BY DUKE , I I ,�, / . I "I I- - , I ,� ) X�, �/ X 11 \ ", 1. f I , - . I . \, , I I Al I - . ; _111�� , - -_ -1 !� /l; I 'I- _- - -, , � � j 1: � � j Ij i ,,, "._-/ 11 i I I il -1"��, \ 1, � 1\ , 1� / I ": -�, 12( HDI� �` � i " I I / 111", - '� , i �� _� I I _ i i , / ��,, \ I 1) , , L__�, I I � �,� f r,i� , i �.C_ �, � ,1� I , I � / 1. I �11 q p, 11, - . 1�lf i );i,� // , , , i �// ( "711, / " 1\ ENERGY AND WSP FROM AERIAL PHOTGRAPHY - � I ; I- __ \__ " , " , I.- I I U � " �_ I L� - I \_ (i- , I ,/i��, "'i", / , , , � 2y".0 � I . . I i�l I I / i i I - - _,.__________\;;z�W I I 11 , � I I 1, 1\ r , z � \ , I ! I ! I �iT __ - I / 11 � � , � li I � / r / , i ��-, l , � " .4 ! / /) � z� , I 9 \ I . , , �-\ , ; I , - . I,;" , // , / . Wi. \ DATED 4/17/2014 AND 7/24/2015. 1 I'' � " � �� - I i ii I ., \ 11-1 , � . I % / /, -, " 1, "I ll . I � ', " \�._ � 1\ � i �j !I ��11, " , "�! 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DRAWN BY: TITLE: DATE: I - - PRELIMINARY 1 16 06 16 ISSUED FOR PERMIT/ADDITION OF BENCHMARKS MEW LCW tNOENERGY Amec Foster Wheeler Environment & Infrastructure, Inc. amec I REVIEWED BY: APT DRAWING NO. - 0 14 01 16 ISSUED FOR PERMIT MDB LCW 2801 YORKMONT ROAD, SUITE 100 foster LCW EXISTING CONDITIONS / UTILITIES NOT FOR CONSTRUCTION I I - CHARLOTTE, NC 28208 SCALE: C-1.2 REV D M Y ISSUE/REVISION DESCRIPTION ENG. .APP�R TEL: (704) 357-8600 FAX: (704) 357-8638 wheeler - - I I - LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 - AS NOTED - -6 0-) 0) N 00 (5) IL 0 a_ 0 IL -C 0 T) (N 0 L0 B co I,- 0 00 C-) C) E 0 C-0 Q6 -6 C i T __j z U) (D 0 Lj 0 E ASH BASIN LIMITS (APPROXIMATE) EXISTING CONTOURS ZINT. EXISTING CONTOURS 10'INT. ASH EXCAVATION CONTOURS ZINT. ASH EXCAVATION CONTOURS 10'INT. ROPOSED UNDERDRAIN + PROPOSED STORMWATER CHANNELS LIMITS OF ASH EXCAVATION (APPROXIMATE) ASHEVILLE CONTROL POINTS # NORTHING EASTING ELEV. DESC. 103 643,472.89 944,733.49 2,166.34 REBAR 105 642,914.75 944,765.60 2,164.94 REBAR I IF 7 Ij --- — ------ \�X\ -7 — — — — — — — — — Z il x /yx X, if X. V (APPROXIMATE) z- ff, 1982 ASH BASIN LIMITS N x X ........ -2130 ..... ..... ............ .... ....... V/ '56 N, ............... /27 It V .. Y ........... -ab .......... z < 'A AM, ..... ............. V ........ . ...... . ............ �; .. ........... z- ....... ...... . \ 4 ................... ......... ... ... ............ . . .......... ............ �z APPROXIMATE LOCATION ....... ...... ............. .. . .................. U ... .. OF WET AREA #1 .............. ....... ....... ......... %� ......... ..... ....... 4 r ............. h . ..... ........ ...... .... . 7 q'I 1 j . . . .. . ......... ...... ..... 4. ................ ....... ... . .......... ............ ......... Ar. + . . .. . . . . . . . . . . . . . . . . . . ... ............ .. ... .......... ... 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I ......... . .. ........ ........ .. ...................... . ......... ............. ................... ........................ ......... — — — — — ---- ............. 1982 ASH BASIN EMBANKME NT CHANNELIL) . ........... ........... X� '\FT 00 100 1982 EAST OUTL ET ...... A 4t- + DAM BREACH LIMITS OF DAM U/B M I EL. 2098' BREACH EXCAVATION CLIENT LOGO: CLIENT: DATUM: PROJECT: ni= Amn A gw purwAi pi am PROJECT NO.: 7810150250 REVISION NO. NA PRELIMINARY NOT FOR CONSTRUCTION 0 14 01 16 ISSUED FOR PERMIT REV D M Y ISSUE/REVISION DESCRIPTION D U'r,\*E 61U , E N E RG"' Y IR 0 G" R ES S MDB LCW ENG. APPR. DUKE ENERGY PROGRESS, LLC BUNCOMBE COUNTY, NORTH CAROLINA Amec Foster Wheeler Environment & Infrastructure, Inc. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL: (704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 NAVD 88 1982 ASH BASIN PROJECTION: ASHEVILLE STEAM ELECTRIC GENERATING PLANT STATE PLANE 83 BUNCOMBE COUNTY, NORTH CAROLINA UKAVVN t$Y: TITLE: APT REVIEWED BY: LCW I FINAL GRADES AS NOTED 01-14-2016 DRAWING NO. C-1.4 0 Ui _J Q w W J 0 / 0 0 U C / L 0 C) Q0 G) N 0) C 0 Q U U R- C: U) N O i 0 N M Q 0 cn N 0 0 co / 0 cc U 0 / 0 0 Q / E 0 0 c9 0 N 0 0 w J 0 a 0 T 0 J Q z Q) 0 C V) W s �i a m -U 0 d 2200 EXISTING GROUND EMBANKMENT LIM17S ,-1982 ASH BASIN EMBANKMENT REMOVAL2100 ASH EXCAVATION LIMITS ASH REMOVAL RESIDUUM SURFACE 2000 _ .._ _ _ 2000 0+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00 11+00 12+00 13+00 14+00 15+00 16+00 17+00 18+00 19+00 20+00 PROFILE 1 2200 __ _. _ _ _ _ _ _ _ _ _ 2200 9p b 1 - � E 2150 .__._.—.--- PROPOSED GROUNDLINE EXISTING GROUND 2150 _. _ (FINAL GRADE) RESIDUUM SURFACE 2100 2100 CCI CHANNEL ID.6 1982 WEST � � � � UNDERDRAIN � � CHANNEL ID. 6 —� -- CHANNEL ID. 1982 EAST 2 _ 6 ASH EXCAVATION LIMITS ASH REMOVAL 1982 EAST 2 2050 2050 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 1 7+50 8+00 8+50 9+00 9+50 10+00 10+50 11+00 11+50 12+00 12+50 13+00 13+50 SECTION 2 2200 2100 2200 PROPOSED GROUNDLINE (FINAL GRADE) �— EXISTING GROUND I (EMBANKMENT CREST) 1982 BASIN EMBANKMENT REMOVAL „`^+.., ::: r ;� r / rt f J- / .r J ; / ,, / .t/ �/T �✓ I f/ r! // , /i' a./'.. ./{ /: /r ! i / /`�rr"r. , /i t ! ` / r<!.` -/ l : / T"!_,,/r""f;> / � i'�/ i .._i.:. —r/ a /;` / ., - % .-- ,.' r�2I/,, ` :: i' / ✓ / /'`'_/i9/ 7/ ._,,.! f ! / _`_2150 '` �v'i,/ i / �" j/-`r f / t n — , PMP CONTAINMENT EL. — 21261 2100 2050 0+00 0+50 1+00 1+50 2+00 49 ZVI I OL141 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+50 8+00 8+50 9+00 9+50 10+00 10+50 _ 11+00. 11+50 SECTION 3 2200 _ _ 2200 SEPARATOR DIKE EXISTING GROUND 2150 a 7 %q PROPOSED BACKFILL 2150 �.._ __ . - _. __. .._ _ _ � (FINAL _G GRA DE) : - 3 2100 _.___ RF.sini iI IM $I )RI:A(_ F � -�_ � 2100 6 CHANNEL ID. 1964 ASH BASIN / — ASH C-1.6 1982 WEST 1982 ASH BASIN ASH REMOVAL 2050 2050 0+50 1+00 1+50 2+00. 2+50 3+00 3+50 _4+00 4+50 _ 5+00 5+50 _ 6+00 SECTION 4 CLIENT LOGO: CLIENT: 0 14 01 16 REV D M Y ISSUED FOR PERMIT ISSUE/REVISION DESCRIPTION g MDB LCW �ENG. DUKE ENERGY PROGRESS, LLC BUNCOMBE COUNTY, NORTH CAROLINA Amec Foster Wheeler Environment & Infrastructure, Inc. 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL: (704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 DATUM: PROJECT NAVD 88 PROJECTION: STATE PLANE 83 DRAWN BY: TITLE: APT REVIEWED BY: LCW SCALE: AS NOTED 3 i _W r.-. -_—. ...-- 12+00 12+50 CAR®®° `®. 04 903 _ y:�•. G►NE�.•• �4 . 13+00 2200 2150 2100 2050 13+50 DECOMMISSIONING AND ASH REMOVAL PLAN 1982 ASH BASIN ASHEVILLE STEAM ELECTRIC GENERATING PLANT BUNCOMBE COUNTY, NORTH CAROLINA PROFILES ZETAINNI Mix PROJECT NO.: 7810150250 REVISION NO. NA DATE: 01-14-2016 DRAWING NO, C 1 a5 2200 3 vi J Q w 0 w w 0 U) .3 0 i ry L u) 0 0 Q0 rn N 00 0) a 0 a_ _Y U U 0- U) 0 0 0 i 0 0 U U) Q O L0 N 0 T) 0 00 i 0 00 U 0 d 0 Q C) i L N 0 0 N J Q L1 L) (n w J L� O w 0 a J Q z Cn Q) w ui m Q) 0 2150 -I_ SEE DETAIL �- SEE DETAIL 2100 1.0% - 1.0% _ j ° 1A/o UNDERDRAIN TO PROPOSED UNDERDRAIN — INTERCEPT WET AREA #1 2050 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+50 8+00 8+50 9+00 _ 9+50 10+00 10+50 11+00 UNDERDRAIN PROFILE 1 -- VARIES -- -- 20' APPROX. EXISTING GROUND RANDOM FILL 2' MIN. OVERLAP —_ 12' APPROX. EXISTING 12 OZ. NONWOVE '' ' GROUND NO. 57 COARSE G - ' — — — -� EOTEXTILE FILT R FABMC 2' MIN. OVERLAP AGGREGATE _T No. 57 COA SE 12 Z. NONWOVEN AGGREG TE GEOTEXTILE FILTER FABRIC 2.5' -- 2 - 6"0 PERFORATED HDPE DR-26 DRAINAGE PIPES UNDERDRAIN DETAIL 2 STA. 0+28 - 2+19 NOTE: INSTALL GEOTEXTILE FILTER FABRIC PER MANUFACTURER'S SPECIFICATIONS. 20' RANDOM FILL 2' MIN. OVERLAP NO. 57 COARSE 12 OZ. NONWOVE AGGREGATE GEOTEXTILE FILT R FABRIC 10, MIN. � � s� xr �� r' �-,.�, j �`• 4, �. COHESIVE FILL RANDOM _�� 2.5' � MATERIAL COHESIVE FILL � 12' 2 - 6 -0 PERFORATED ELOPE DR-26 DRAINAGE PIPES RANDOM MATERIAL UNDERDRAIN DETAIL 4 STA. 9+52 - 12+25 UNDERDRAIN DETAIL r3 STA. 2+91 - 9+52 COHESIVE FILL FINAL GRADE --- 20' t I E 2' MIN. OVERLAP 12 OZ. NONWOVEN GEOTEXTILE FILTER FABRIC : X: EXIST. ?�� % 4 EXIST. EMBANKMENT NO. 57 COARSE AGGREGATE- 2 5' 12' 2 - 6"0 PERFORATED HDPE DR-26 DRAINAGE PIPES UNDERDRAIN DETAIL r5 STA. 12+25 - 15+22 SEE DETAIL SEE DETAIL 5 1982 BASIN EMBANKMENT / REMOVAL 0 EMBANKMENT- EXCAVATIONIFROM INSTALLATION OF PROPOSED UNDERDRAIN (BACKFILL WITH COMPACTED COHESIVE SOIL TO FINAL GRADE) 11+50 12+00 12+50 _ 13+00.._ - 13+50 14+00 14+50 15+00 15+50 1982 Basin Channel Summary Channel ID Q100(cfs) Slope (ft/ft) Channel Type Side Slope (H:V) Bottom Width ft Flow Depth ft LiningType 1982 West 138 0.01 Tra ezoidal 2:1 5 3.2 Class B 1982 West Outlet 138 0.15 Trapezoidal 3:1 15 0.9 Class 2 1982 East 2 85 0.01 Trapezoidal 2:1 5 2.6 Class B 1982 East 1 87 0.01 Trapezoidal 2:1 5 2.7 Class B 1982 East 171 0.01 Trapezoidal 2:1 8 3.1 Class B 1982 East Outlet 186 0.15 Trapezoidal 3:1 1 20 1 0.9 1 Class 2 Acceptance Criteria for Rip Rap and Stone for Erosion Control Class Required Stone Sizes (inches) Minimum Midrange Maximum A 2 4 6 B 5 8 12 1 5 10 17 2 9 14 23 NOTE: INSTALL GEOTEXTILE FILTER FABRIC PER MANUFACTURER'S SPECIFICATIONS. GEOTEXTILE aFILTER FABRIC ASH BASIN STORMWATER CHANNEL DETAIL K'_6� \\\\\\1111111 t 1011111, 90 I�A CA ' E f W1�,``P�>�`�� PERMIT SUBMITTAL CLIENT LOGO: CLIENT: DATUM: PROJECT: DECOMMISSIONING AND ASH REMOVAL PLAN PROJECT NO.: NAVD 88 1982 ASH BASIN 7810150250 DUKE ENERGY PROGRESS, LLC PROJECTION: fe IASHEVILLE STEAM ELECTRIC GENERATING PLANT REVISION NO. KE BUNCOMBE COUNTY, NORTH CAROLINA STATE PLANE 83 BUNCOMBE COUNTY, NORTH CAROLINA NA 44DRAWN BY: �:. 2„ Q APT TITLE: DATE: PRELIMINARY 01-14-2016 Amec Foster Wheeler Environment & Infrastructure, Inc. amec REVIEWED BY: DRAWING NO. NOT ®� ®��'®� �"'I'�s.�'GRE. 2801 YORKMONT ROAD, SUITE 100 foster LCW ■ 0 14 01 16 ISSUED FOR PERMIT MDB LCW O.✓ er PROFILES &DETAILS CHARLOTTE, NC 28208 SCALE: C 1 . 6 TEL: (704) 357-8600 FAX: (704) 357-8638 h e e l� r REV D M Y ISSUE/REVISION DESCRIPTION ENG. APPR. LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 AS NOTED P E P P E R B U S H T R L N E W R O C K W O O D R D 2 1 6 0 2 1 5 0 2 1 4 0 2 1 3 0 2 1 2 0 2 1 1 0 2 1 6 0 2 1 5 0 2 1 4 0 2 1 3 0 2 1 2 0 21 1 0 217 0 21 6 0 21 5 0 21 4 0 21 3 0 2120 2110 2 1 7 0 2 1 6 0 2 1 6 0 2 1 5 0 2 1 5 0 2 1 6 0 2 1 5 0 2 1 4 0 2 1 6 0 2 1 5 0 2 1 4 0 2 1 3 0 2 1 2 0 2 1 3 0 2 1 1 0 212 0 2 1 6 0 2 1 5 0 2 1 6 0 2 1 6 0 21 5 0 2 1 5 0 2 1 4 0 21 0 0 2 1 1 0 2100 2 1 0 0 21 1 0 2 1 2 0 2 1 6 0 2 1 5 0 2 1 5 0 2 1 5 0 2 1 6 0 2 1 5 0 2 1 4 0 21 5 0 21 4 0 2 1 6 0 2 1 6 0 2 1 6 0 2 1 1 0 210 0 2 1 6 0 2 1 5 0 2 1 5 0 2 1 7 0 2 1 6 0 2160 2 0 9 9 . 4 9 4 2 0 9 9 . 2 7 0 2 0 9 9 . 0 6 5 2 0 9 9 . 1 1 6 2 0 9 8 . 9 4 4 2 0 9 9 . 1 0 4 2 0 9 9 . 3 5 7 2 0 9 8 . 7 0 5 2 0 9 8 . 7 3 9 2 0 9 9 . 1 4 2 2 0 9 9 . 6 5 8 2 1 0 0 . 3 2 5 2 1 0 1 . 3 3 2 E X P O S E D R O C K 2 1 2 0 . 8 5 0 E X P O S E D R O C K 2 1 2 7 . 1 7 0 A P P R O X I M A T E L I M I T S O F A S H E X C A V A T I O N A P P R O X I M A T E A S H E X C A V A T I O N C O N T O U R S 1982 ASH BASIN EMBANKMENT Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î C H A N N E L I D . 1 9 8 2 E A S T 1 CHANNEL ID.1982 WESTCHANNEL ID.1982 WEST OUTLET Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ÎÎÎÎÎÎÎÎ L I M I T S O F D A M B R E A C H E X C A V A T I O N A P P R O X I M A T E L I M I T S O F I M P O U N D M E N T B A C K F I L L P R O P O S E D F I N A L C O N T O U R S E X I S T I N G C O N T O U R S ( T Y P ) C H A N N E L I D . 1 9 8 2 E A S T 2 C H A N N E L I D . 1982 E A S T O U T L E T C H A N N E L I D . 1 9 8 2 E A S T 6 C - 1 . 6 6 C - 1 . 6 6C-1.6 6C-1.6 6C-1.6 6 C - 1 . 6 S I L T B A S I N 4 E - 1 . 2 S I L T B A S I N 4 E - 1 . 2 SILT B A S I N 4 E - 1 . 2 S I L T B A S I N 4 E - 1 . 2 N ISS U E / R E V I S I O N D E S C R I P T I O N YREVDM E N G . A P P R . C L I E N T L O G O : R E V I E W E D B Y : S C A L E : D A T U M : P R O J E C T I O N : T I T L E : P R O J E C T : D A T E : D R A W I N G N O . R E V I S I O N N O . P R O J E C T N O . : D R A W N B Y : C L I E N T : 2 8 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 C H A R L O T T E , N C 2 8 2 0 8 T E L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 L I C E N S U R E : N C E N G : F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 A m e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . A S N O T E D 7 8 1 0 1 5 0 2 5 0 N A 0 1 - 1 4 - 2 0 1 6 N A V D 8 8 S T A T E P L A N E 8 3 A P T L C W P E R M I T S U B M I T T A L D E C O M M I S S I O N I N G A N D A S H R E M O V A L P L A N 1 9 8 2 A S H B A S I N A S H E V I L L E S T E A M E L E C T R I C G E N E R A T I N G P L A N T B U N C O M B E C O U N T Y , N O R T H C A R O L I N A D U K E E N E R G Y P R O G R E S S , L L C B U N C O M B E C O U N T Y , N O R T H C A R O L I N A I S S U E D F O R P E R M I T 1601401 M D B L C W E P S C P L A N V I E W - E P S C P L A N E - 1 . 1 NOTES1.EXISTING TOPOGRAPHY PROVIDED BYDUKE ENERGY DATED 07-27-2015.2.APPLY TEMPORARY SEEDING ONAREAS THAT WILL NOT BE GRADED FOR21 DAYS.LEGENDSILT FENCEEROSION CONTROL LOGSILT BASIN F R O N T E L E V A T I O N S E C T I O N A - A A 1 / 3 L L ( V A R I E S ) F L O W A 1 0 ' 2 : 1 G R O U N D L I N E S E C T I O N A - A A A N O T E S : T Y P I C A L D E T A I L F O R R O C K C H E C K D A M T Y P E I I 2 : 1 2 : 1 2 : 1 F L O W T O P O F B A N K F L O W L I N E F R O N T E L E V A T I O N # 1 C O A R S E A G G R E G A T E G R O U N D L I N E 1 ' M I N . 1 8 " # 5 7 S T O N E 2 ' 18" 1 2 " 5 7 S T O N E 6 ' 1 ' 1 ' 6 " T Y P I C A L D E T A I L F O R R O C K C H E C K D A M T Y P E I 24" MAX. 1 8 " F O U N D A T I O N H ( S E E N O T E 3 ) R O C K C H E C K D A M S T H A T A R E D E S I G N A T E D O N T H E P L A N S A S A S T O R M W A T E R M A N A G E M E N T ( S W M ) I T E M A R E T O B E L E F T I N P L A C E A S A P E R M A N E N T I N S T A L L A T I O N . W H E R E D R A I N A G E A R E A S E X C E E D 1 A C R E O R D I T C H G R A D E E X C E E D S 3 P E R C E N T , A T E M P O R A R Y S E D I M E N T F O R E B A Y S H A L L B E I N S T A L L E D W I T H M I N I M U M D I M E N S I O N S O F 1 2 " D E P T H , 2 ' W I D T H A N D 6 ' L E N G T H . I F C H E C K D A M S I S L O C A T E D I N S I D E C L E A R Z O N E A N D A D J A C E N T T O A T R A V E L W A Y , S L O P E F A C I N G O N C O M I N G T R A F F I C I S T O B E 6 : 1 A N D M A X I M U M H I S T O B E 1 2 " . C H E C K D A M S H A L L N O T B E U S E D F O R L O C A T I O N S I N L I V E S T R E A M . S U G G E S T E D R O C K C H E C K D A M S P A C I N G L A B H L = H / S W H E R E : H = H E I G H T O F D A M C R E S T I N F E E T S = C H A N N E L S L O P E I N F T / F T L = C H E C K D A M S P A C I N G I N F E E T ; T H E D I S T A N C E S U C H T H A T P O I N T S A A N D B A R E O F E Q U A L E L E V A T I O N S 1 . 2 . 3 . 4 . C H E C K D A M S P A C I N G , L T O B E D E T E R M I N E D F R O M T H E E Q U A T I O N . I N S T E E P S L O P E A R E A S T H E C H E C K D A M S P A C I N G I S N O T T O B E L E S S T H A N 2 5 ' . H E I G H T ( H ) O F C R E S T I S T O B E 3 ' + / - I F C H A N N E L O R S W A L E I S D E E P E N O U G H O R A S D E S I G N A T E D B Y D E S I G N E R . S E D I M E N T F O R E B A Y S E D I M E N T F O R E B A Y ( 1 8 ' M A X . ) 1 2 " F O U N D A T I O N # 1 C O A R S E A G G R E G A T E 2 ' D R Y R I P R A P C L A S S I D R Y R I P R A P C L A S S I F R O N T E L E V A T I O N R O C K C H E C K D A M N T S 3 - E P S C D E T A I L S - E P S C T Y P I C A L D E T A I L S E - 1 . 2 ISS U E / R E V I S I O N D E S C R I P T I O N YREV D M E N G . A P P R . C L I E N T L O G O : R E V I E W E D B Y : S C A L E : D A T U M : P R O J E C T I O N : T I T L E : P R O J E C T : D A T E : D R A W I N G N O . R E V I S I O N N O . P R O J E C T N O . : D R A W N B Y : C L I E N T : 2 8 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 C H A R L O T T E , N C 2 8 2 0 8 T E L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 L I C E N S U R E : N C E N G : F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 A m e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . A S N O T E D 7 8 1 0 1 5 0 2 5 0 N A 0 1 - 1 4 - 2 0 1 6 N A V D 8 8 S T A T E P L A N E 8 3 A P T L C W P E R M I T S U B M I T T A L D E C O M M I S S I O N I N G A N D A S H R E M O V A L P L A N 1 9 8 2 A S H B A S I N A S H E V I L L E S T E A M E L E C T R I C G E N E R A T I N G P L A N T B U N C O M B E C O U N T Y , N O R T H C A R O L I N A D U K E E N E R G Y P R O G R E S S , L L C B U N C O M B E C O U N T Y , N O R T H C A R O L I N A I S S U E D F O R P E R M I T 160 14 01 M D B L C W EROSION CONTROL LOG 18" TEMP EROSIONCONTROL LOG S T A K E L O G O N D O W N H I L L S I D E A T T H E C E N T E R , A T E A C H E N D , A N D A T A D D I T I O N A L P O I N T S A S N E E D E D T O S E C U R E L O G 4 ' M A X . S P A C I N G , O R A S D I R E C T E D . M U L C H C R A D L E U N D E R E R O S I O N C O N T R O L L O G 18" TEMP. EROSIONCONTROL LOGSTAKE LOG ON DOWNHILLSIDE AT THE CENTER ATEACH END. AND AT ADDITIONALPOINTS AS NEEDED TO SECURELOG, OR AS DIRECTED.FLOWAASECURE ENDOF LOG TOSTAKE (TYP)STAKES ON DOWNHILL SIDEOF LOG AT 8' OC MAX ORAS NEEDED TO SECURE LOG,OR AS DIRECTED.DISTURBED AREAFLOW12" TEMP. EROSIONCONTROL LOG 1'SECURE END OF LOGTO STAKE (TYP) 2 ' 1 ' D I R E C T I O N O F F L O W SECURE E N D S O F LOGS TO STA K E S ( T Y P ) DIRECTI O N OF FLO W NOTES:1. DAILY INSPECTION SHALL BE MADE BY THE CONTRACTOR AND SILT ACCUMULATION MUST BE REMOVED WHEN DEPTH REACHES 6".2. CONTRACTOR SHALL MONITOR THE PERFORMANCE OF LOGS DURING RAINFALL EVENT FOR PROPER PERFORMANCE.3. LOGS SHALL CONSIST OF 100% BIODEGRADABLE, PHOTODEGRADABLE OR RECYCLABLE CONTAINMENT MESH STUFFED WITH FILTER MATE R I A L . 4. STUFF LOGS WITH SUFFICIENT FILTER MATERIAL TO ACHIEVE DENSITY THAT WILL HOLD SHAPE WITHOUT EXCESSIVE DEFORMATION. FILT E R MATERIAL SHALL CONSIST OF MULCH, ASPEN EXCELSIOR WOOD FIBERS, CHIPPED SITE VEGETATION, COCONUT FIBERS,100% RECYCLAB L E F I B E R S , OR ANY OTHER ACCEPTABLE MATERIAL, EXCLUDING STRAW AND HAY.5. STAKES SHALL BE 2" X 2" WOOD, 4' LONG, EMBEDDED SUCH THAT 2" PROTRUDES ABOVE LOG, OR AS DIRECTED.EROSION CONTROL LOG CHECK DAM L A P D E T A I L 2 " SE C T I O N A - A PLANPLAN 1'2'NOTES:1. FILTER FABRIC S H A L L B E P U R C H A S E D I N A C O N T I N U O U S R O L L A N D C U T T O T H E LENGTH OF THE B A R R I E R T O A V O I D T H E U S E O F J O I N T S . 2. HEAVY DUTY ST A P L E S ( # 9 W I R E ) A T 1 1 / 2 " L O N G S H A L L B E U S E D T O F A S T E N F A B R I C TO WOOD STAK E S . 3.SILT BARRIER S H A L L C O M P L Y W I T H T H E T N . D E P T . O F E N V I R O N M E N T A N D CONSERVATION E R O S I O N A N D S E D I M E N T C O N T R O L H A N D B O O K , L A T E S T E D I T I O N . 4. NCDEQ EROSIO N A N D S E D I M E N T A T I O N C O N T R O L R E Q U I R E M E N T S . 2'18"MIN.3' MAX.ATTACH FABRICTO STAKESEXISTINGGROUNDBURY TOEOF FABRIC FABRICSILTBARRIER NOMINAL 2"X2" WOODOR METAL STAKEDRIVEN SECURELYFLOWMIN. 4" DIA.x6' LONG WOOD POSTS OR 1.33 lb./LFSTEEL POSTS WITH FASTENING PROJECTION.LENGTH TO BE 5', SPACE @ 10' O.C. MAX.STANDARD STRENGTHSYNTHETIC FILTER FABRICTRENCH, 4" WIDE X 4" DEEP (TRENCHSHALL BE BACKFILLED AND THE SOILCOMPACTED OVER THE FABRIC MATERIAL)8" OF FABRIC SHALL BE EXTENDEDINTO TRENCH AS SHOWN NOMINAL 2"X2" WOOD STAKES DRIVENSECURELY (SPACE @ 3' MAX.)GROUNDSURFACE 24"18" MIN. S I L T F E N C E 2 - 1- S I L T B A S I N N T S 4 - P L A N V I E W P R O F I L E S E C T I O N 100' 2 2 5 ' 1 0 0 ' 4' 4' 1 . 5 : 1 1 . 5 : 1 1 . 5 : 1 1 . 5 : 1 2 2 5 ' 1 . 5 : 1 1 . 5 : 1 1 . 5 : 1 1 . 5 : 1 1 . 5 : 1 1 . 5 : 1 VICINITY MAP N LOCATION MAP N 1964 ASH BASIN 1964 ASH BASIN EROSION AND SEDIMENTATION CONTROL PLAN 1982 ASH BASIN DECOMMISSIONING AND ASH REMOVAL ASHEVILLE STEAM ELECTRIC GENERATING PLANT BUNCOMBE COUNTY, NORTH CAROLINA PREPARED FOR: DUKE ENERGY PROGRESS, LLC 1982 ASH BASIN 1982 ASH BASIN COVER SHEET E-1.1 ISSUE/REVISION DESCRIPTIONYREVDM ENG.APPR. CLIENT LOGO: REVIEWED BY: SCALE: DATUM: PROJECTION: TITLE: PROJECT: DATE: DRAWING NO. REVISION NO. PROJECT NO.: DRAWN BY: CLIENT: 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL:(704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 Amec Foster Wheeler Environment & Infrastructure, Inc. AS NOTED 7810150250 2 02-23-2016 NAVD 88 STATE PLANE 83 APT LCW EROSION AND SEDIMENTATION CONTROL PLAN 1982 ASH BASIN DECOMMISSIONING AND ASH REMOVAL ASHEVILLE STEAM ELECTRIC GENERATING PLANT BUNCOMBE COUNTY, NORTH CAROLINA DUKE ENERGY PROGRESS, LLC BUNCOMBE COUNTY, NORTH CAROLINA ISSUED FOR PERMIT1602302 MB LW INCORPORATE COMMENTS1612505 DRS LW ADDRESSED DEQ COMMENTS1621807 JP LW PROJECT CONTACT INFORMATION OWNER: DUKE ENERGY PROGRESS, LLC PROJECT ADDRESS: 200 CP AND L DRIVE ARDEN, NC. 28704 CONTACT NAME: TINA WOODWARD PHONE: (704) 382-4585 EMAIL: TINA.WOODWARD@DUKE-ENERGY.COM PROJECT E&SC ENGINEERING FIRM: AMEC FOSTER WHEELER ENVIRONMENT & INFRASTRUCTURE, INC. PROJECT E&SC PLAN RESPONSIBLE ENGINEER: LUKE WILLIAMS, PE PHONE: (865) 671-6774 EMAIL: LUKE.WILLIAMS@AMECFW.COM PROJECT NOTES PROJECT DESCRIPTION THE PURPOSE OF THIS PROJECT IS TO SUPPORT COAL COMBUSTION RESIDUAL (CCR) REMOVAL FROM THE 1982 ASH BASIN (BUNCO-089) BY DEVELOPING A GRADING PLAN THAT EFFECTIVELY DECOMMISSIONS THE EXISTING ASH BASIN AND THE ASSOCIATED DAM. FOLLOWING THE REMOVAL OF THE ASH, THE ASH BASIN DAM WILL BE MODIFIED SO THAT IT NO LONGER FUNCTIONS AS A DAM AND SUBSEQUENTLY IS REMOVED FROM THE STATE DAM INVENTORY AND JURISDICTION OF STATE DAM SAFETY REGULATIONS. THE GRADING PLANS DEVELOPED FOR THE SITE, FOLLOWING CCR REMOVAL, WILL ESTABLISH GRADES THAT PREVENT IMPOUNDING OF RUNOFF. THESE DRAWINGS ARE PROVIDED TO IDENTIFY THE MINIMUM REQUIREMENTS FOR THE EROSION AND SEDIMENT CONTROL PLAN ASSOCIATED WITH PERFORMING THE PROPOSED DAM DECOMMISSIONING AND CLOSURE ACTIVITIES. THESE ACTIVITIES INCLUDE THE BREACHING OF THE EXISTING DAM, FILL PLACEMENT WITHIN THE EXISTING BASIN, AND CONSTRUCTING STORMWATER CHANNELS WITHIN THE LIMITS OF THE PROJECT. DUKE ENERGY WILL BE RESPONSIBLE FOR OBTAINING ALL PERMITS REQUIRED FOR PERFORMING THE GRADING ACTIVITIES PRIOR TO STARTING THE WORK. DAM DESCRIPTION 1982 ASH BASIN DAM STATE DAM ID NO.: BUNCO-089 HAZARD CLASSIFICATION: HIGH NPDES PERMIT NO.: NC0000396 TOTAL ESTIMATED DISTURBED AREA TO BE STABILIZED WITH VEGETATION TOTAL COMBINED AREA - 52.4 ACRES REFERENCE DRAWINGS DECOMMISSIONING AND ASH REMOVAL PLAN - 1982 ASH BASIN AMEC FOSTER WHEELER PROJECT No. 7810-15-0250 Sheet List Table Sheet Number Sheet Title E-1.1 COVER SHEET E-1.2 SITE AERIAL E-1.3 EXISTING CONDITIONS - UTILITIES E-1.4 E&SC PLAN PHASE 1 E-1.5 E&SC PLAN PHASE 2 E-1.6 E&SC PLAN PHASE 3 E-1.7 PROFILES & DETAILS E-1.8 E&SC TYPICAL DETAILS E-1.9 EAST & WEST SEDIMENT POND DETAILS E-1.10 EAST UPSTREAM SEDIMENT POND DETAILS E-1.11 E&SC NOTES E-1.12 E&SC NOTES SEPARATOR DIKE EXISTING ROAD CONCRETE RIM DITCH DECANT BASIN 1982 ASH BASIN 1964 ASH BASIN SEDIMENT DISCHARGE POND (DUCK POND) 1982 ASH BASIN LIMITS (APPROXIMATE) 1964 ASH BASIN LIMITS (APPROXIMATE) 1964 ASH BASIN DAM FGD WETLANDS LAKE JULIAN 1982 ASH BASIN DAM ASHEVILLE STEAM ELECTRIC GENERATING PLANT PROPERTY BOUNDARY FRENCH BROAD RIVER COVE AREA INTERSTATE 26 PROJECT ENTRANCE /$7 /21 WETLAND (TYP) STILLING BASIN N LEGEND ASH BASIN LIMITS (APPROXIMATE) COVE AREA PROPERTY BOUNDARY WETLAND NOTE: 1.PROPERTY BOUNDARY WAS OBTAINED FROM BUNCOMBE COUNTY GIS DATA. 2.AERIAL PHOTO DATED 10-18-2015 SOURCE BY GOOGLE EARTH PRO. 3.PROJECT LOCATION IS IN THE FRENCH BROAD RIVER BASIN. 4.AERIAL PHOTO SHOWN DOES NOT REPRESENT CURRENT SITE CONDITIONS. SITE AERIAL E-1.2 ISSUE/REVISION DESCRIPTIONYREVDM ENG.APPR. CLIENT LOGO: REVIEWED BY: SCALE: DATUM: PROJECTION: TITLE: PROJECT: DATE: DRAWING NO. REVISION NO. PROJECT NO.: DRAWN BY: CLIENT: 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL:(704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 Amec Foster Wheeler Environment & Infrastructure, Inc. AS NOTED 7810150250 2 02-23-2016 NAVD 88 STATE PLANE 83 APT LCW EROSION AND SEDIMENTATION CONTROL PLAN 1982 ASH BASIN DECOMMISSIONING AND ASH REMOVAL ASHEVILLE STEAM ELECTRIC GENERATING PLANT BUNCOMBE COUNTY, NORTH CAROLINA DUKE ENERGY PROGRESS, LLC BUNCOMBE COUNTY, NORTH CAROLINA ISSUED FOR PERMIT1602302 MB LW INCORPORATE COMMENTS1612505 DRS LW ADDRESSED DEQ COMMENTS1621807 JP LW I N T E R S T A T E 2 6 I N T E R S T A T E 2 6 F R E N C H B R O A D R I V E R F R E N C H B R O A D R I V E R MAHO G A N Y R O A D LAKE JULIAN MAH O G A N Y R O A D ABER D E E N D R DOUGLA S F I R A V E PEP P E R B U S H T R L NEW R O C K W O O D R D NE W R O C K W O O D R D NE W R O C K W O O D R D I N T E R S T A T E 2 6 I N T E R S T A T E 2 6 I N T E R S T A T E 2 6 I N T E R S T A T E 2 6 216 0 215 0 2140 21 3 0 21 2 0 211 0 216 0 215 0 214 0 213 0 212 0 211 0 21 7 0 21 6 0 21 5 0 21 4 0 213 0 21 2 0 21 1 0 21 7 0 2 1 6 0 21 6 0 2 1 5 0 21 5 0 21 6 0 21 5 0 2 1 4 0 2160 2150 2140 213 0 2 1 2 0 2130 21 1 0 21 2 0 216 0 2150 2 1 6 0 216 0 21 5 0 215 0 2140 210 0 2 1 1 0 21 0 0 2100 21 1 0 212 0 2160 2150 2150 2150 216 0 21 5 0 21 4 0 215 0 214 0 2 1 6 0 2160 2160 2 1 1 0 21 0 0 2 1 6 0 2150 2150 2170 2160 21 6 0 2099.494 2099.270 2099.065 2099.116 2098.944 2099.104 2099.357 2098.705 2098.739 2099.142 2099.658 2100.3252101.332 EXPOSED ROCK 2120.850 EXPOSED ROCK 2127.170 21 4 0 21 2 0 21 0 0 20 8 0 21 1 0 21 2 0 21 3 0 21 4 0 21 5 0 21402120 2100 2140 21 4 0 215 0 20 8 0 20 9 0 21 0 0 21 1 0 21 2 0 21 3 0 21 4 0 2170 2160 2150 212 0 213 0 215 0 214 0216 0 2 1 1 0 2130 21 5 0 2130 2120 2140 2130 21 2 0 2110 1982 ASH BASIN LIMITS (APPROXIMATE) 1964 ASH BASIN LIMITS (APPROXIMATE) EXISTING 36" HDPE PRIMARY SPILLWAY EXISTING OVERHEAD TRANSMISSION LINES EXISTING WETLAND DISCHARGE PIPE (ABANDONED) EXISTING 36" RISER w/ 36" HDPE BARREL OUTLET STRUCTURE EXISTING 66" RCP EXISTING 60" RCP PROPERTY LINE APPROXIMATE LOCATION OF WET AREA #2 (NOTE 1) EXISTING OUTLET STRUCTURE 1982 BASIN PRIMARY SPILLWAY (ABANDONED) EXISTING PIPE1982 BASIN PRIMARY SPILLWAY (ABANDONED) HISTORICAL 1964 PRIMARY SPILLWAY 30" CONC. PIPE (ABANDONED) MH-02 MH-01 (2) 36" HDPE RIM DITCH SYSTEM DISCHARGE LINES (APPROXIMATE) MSD SEWER LINES EXISTING FGD DISCHARGE LINE (ABANDONED) SEPARATOR DIKE TREELINE (TYP) EXISTING CONTOURS WETLAND (TYP) APPROXIMATE LOCATION OF WET AREA #1 (NOTE 1) EXISTING STORMWATER CONTROL FOR 1982 BASIN ASH REMOVAL APPROXIMATE ASH EXCAVATION CONTOURS WATERSHED BOUNDARY (TYP) APPROXIMATE EXCAVATION LIMITS ISSUE/REVISION DESCRIPTIONYREVDM ENG.APPR. CLIENT LOGO: REVIEWED BY: SCALE: DATUM: PROJECTION: TITLE: PROJECT: DATE: DRAWING NO. REVISION NO. PROJECT NO.: DRAWN BY: CLIENT: 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL:(704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 Amec Foster Wheeler Environment & Infrastructure, Inc. AS NOTED 7810150250 2 02-23-2016 NAVD 88 STATE PLANE 83 APT LCW EROSION AND SEDIMENTATION CONTROL PLAN 1982 ASH BASIN DECOMMISSIONING AND ASH REMOVAL ASHEVILLE STEAM ELECTRIC GENERATING PLANT BUNCOMBE COUNTY, NORTH CAROLINA DUKE ENERGY PROGRESS, LLC BUNCOMBE COUNTY, NORTH CAROLINA ISSUED FOR PERMIT1602302 MB LW INCORPORATE COMMENTS1612505 DRS LW ADDRESSED DEQ COMMENTS1621807 JP LW N E-1.3 LEGEND ASH BASIN LIMITS (APPROXIMATE) PROPERTY LINE MSD SEWER LINE WETLAND APPROX. ASH EXCAV. CONTOURS WATERSHED BOUNDARY LIMITS OF DISTURBANCE NOTES 1.DURING ASH REMOVAL IN THE 1982 ASH BASIN, TWO WET AREAS HAVE BEEN IDENTIFIED. FLOW FROM THESE WET AREAS WILL BE CONTAINED IN UNDERDRAINS OR DITCHES. 2.EXISTING TOPOGRAPHY INSIDE LIMITS OF ASH EXCAVATION PROVIDED BY McKIM & CREED DATED 10/30/2015. OUTSIDE THIS BOUNDARY EXISTING TOPOGRAPHY PROVIDED BY DUKE ENERGY AND WSP FROM AERIAL PHOTGRAPHY DATED 4/17/2014 AND 7/24/2015. EXISTING CONDITIONS - UTILITIES A B E R D E E N D R P E P P E R B U S H T R L N E W R O C K W O O D R D 2160 2150 2 1 6 0 2 1 6 0 2 1 5 0 2 1 4 0 2 1 3 0 2 1 1 0 2120 2 1 6 0 2 1 6 0 2 1 5 0 2 1 6 0 2 1 5 0 2150 21702160216021482150 2150215621582160215421522150ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î E X I S T I N G P R O P E R T Y L I N E EXISTINGSEPARATOR DIKE E X I S T I N G G R O U N D C O N T O U R S EXISTINGCONCRETE RIM DITCH A P P R O X I M A T E R E S I D U U M C O N T O U R S ( S E E N O T E 1 ) FINAL GR A D E FILL LI M I T S TEM P O R A R Y D I V E R S I O N C H A N N E L DIVERSION PUMP(SEE NOTE 4) D I V E R S I O N P U M P ( S E E N O T E 4 & 5 ) C O V E A R E A TEMPORARYSTORMWATER SUMP D I V E R S I O N P U M P ( S E E N O T E 4 & 5 ) E A S T U P S T R E A M S E D I M E N T P O N D N O . 2 2 - Y R P O O L E L . 2 1 2 7 . 8 ' 1 0 - Y R P O O L E L . 2 1 2 9 . 2 ' ( S E E N O T E 4 & 5 ) E M E R G E N C Y S P I L L W A Y E L . 2 1 2 9 ' TEMPORARYSTORMWATER SUMP T O P O F D A M E L . 2 1 3 2 ' T O P O F D A M E L . 2 1 2 4 ' 1 E - 1 . 1 0 SILT FENCE 15' FROM CREST(SLOPE DISTANCE) (SEE NOTE 6)15' E A S T U P S T R E A M S E D I M E N T P O N D N O . 1 2 - Y R P O O L E L . 2 1 2 0 . 9 ' 1 0 - Y R P O O L E L . 2 1 2 2 . 3 ' ( S E E N O T E 4 & 5 ) D I V E R S I O N P U M P ( S E E N O T E 4 & 5 ) E M E R G E N C Y S P I L L W A Y E L . 2 1 2 2 ' 2 E - 1 . 1 0 N L E G E N D S I L T F E N C E E R O S I O N C O N T R O L L O G S I L T B A S I N W E T L A N D R O C K C H E C K D A M L I M I T S O F D I S T U R B A N C E E & S C P L A N P H A S E 1 E - 1 . 4 ISS U E / R E V I S I O N D E S C R I P T I O N YREV D M E N G . A P P R . C L I E N T L O G O : R E V I E W E D B Y : S C A L E : D A T U M : P R O J E C T I O N : T I T L E : P R O J E C T : D A T E : D R A W I N G N O . R E V I S I O N N O . P R O J E C T N O . : D R A W N B Y : C L I E N T : 2 8 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 C H A R L O T T E , N C 2 8 2 0 8 T E L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 L I C E N S U R E : N C E N G : F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 A m e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . A S N O T E D 7 8 1 0 1 5 0 2 5 0 2 0 2 - 2 3 - 2 0 1 6 N A V D 8 8 S T A T E P L A N E 8 3 A P T L C W E R O S I O N A N D S E D I M E N T A T I O N C O N T R O L P L A N 1 9 8 2 A S H B A S I N D E C O M M I S S I O N I N G A N D A S H R E M O V A L A S H E V I L L E S T E A M E L E C T R I C G E N E R A T I N G P L A N T B U N C O M B E C O U N T Y , N O R T H C A R O L I N A D U K E E N E R G Y P R O G R E S S , L L C B U N C O M B E C O U N T Y , N O R T H C A R O L I N A I S S U E D F O R P E R M I T 160 23 02 M B L W I N C O R P O R A T E C O M M E N T S 161 25 05 D R S L W AD D R E S S E D D E Q C O M M E N T S 16218 07 J P L W N O T E S 1 . E X I S T I N G T O P O G R A P H Y P R O V I D E D B Y D U K E E N E R G Y D A T E D 0 7 - 2 7 - 2 0 1 5 . 2 . P R O P O S E D A S H E X C A V A T I O N C O N T O U R S W E R E D E V E L O P E D F R O M A V A I L A B L E T O P O G R A P H I C I N F O R M A T I O N B E F O R E T H E A S H B A S I N W A S C O N S T R U C T E D A N D R E V I S E D B A S E D U P O N G E O T E C H N I C A L D R I L L I N G D A T A . 3 . S E D I M E N T A N D E R O S I O N C O N T R O L S T O B E P R O V I D E D F O R 3 P H A S E S O F D A M R E M O V A L A S F O L L O W S : P H A S E 1 - P R I O R T O D A M B R E A C H ( S E E D R A W I N G E - 1 . 4 ) P H A S E 2 - I N T E R I M D A M B R E A C H ( S E E D R A W I N G E - 1 . 5 ) P H A S E 3 - F U L L D A M B R E A C H ( S E E D R A W I N G E - 1 . 6 ) 4 . D U R I N G C O N S T R U C T I O N A C T I V I T I E S P R I O R T O B R E A C H I N G O F T H E D A M , T H E S T O R M W A T E R R E T A I N E D I N T H E A R E A S I M P O U N D E D W I L L B E P U M P E D T O T H E R I M D I T C H . 5 . T E M P O R A R Y E A S T U P S T R E A M S T O R M W A T E R S E D I M E N T P O N D S 1 & 2 W I L L B E E V A C U A T E D F O L L O W I N G E A C H R A I N F A L L E V E N T B Y P U M P I N G T O T H E R I M D I T C H . 6 . S I L T F E N C E I S T O B E I N S T A L L E D A P P R O X I M A T E L Y 1 5 ' ( S L O P E D I S T A N C E ) F R O M C R E S T P R I O R T O R E M O V I N G M A T E R I A L F R O M D A M C R E S T . C O N T I N U E S I L T F E N C E I N S T A L L A T I O N D O W N S L O P E T O M A I N T A I N T H I S S L O P E D I S T A N C E A S C R E S T I S L O W E R E D . E A C H E N D O F S I L T F E N C E T O B E L O O P E D T O W A R D S D A M C R E S T . M A I N T A I N A M I N I M U M O F 3 R O W S O F S I L T F E N C I N G S P A C E D A T 1 5 ' O F F S E T ( S L O P E D I S T A N C E ) . I N A D D I T I O N , T H E F I R S T T W O R O W S O F S I L T F E N C I N G S H A L L O U T L E T A S S H O W N O N D E T A I L 2 O F E - 1 . 8 . G R A D E C R E S T E X C A V A T I O N T O D I R E C T R U N O F F T O B A S I N A R E A . A B E R D E E N D R P E P P E R B U S H T R L N E W R O C K W O O D R D INTERSTATE 26 2160 2150 2 1 6 0 2 1 4 0 2 1 3 0 2 1 1 0 2120 2 1 6 0 2 1 6 0 2 1 5 0 2 1 6 0 2 1 5 0 2150 21702160216021482150 2156 21582150 Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ E X I S T I N G P R O P E R T Y L I N E EXISTINGSEPARATOR DIKE E X I S T I N G G R O U N D C O N T O U R S EXISTINGCONCRETE RIM DITCH E X I S T I N G H A U L R O A D I N T E R I M D A M B R E A C H C O N T O U R S T E M P O R A R Y D I V E R S I O N C H A N N E L ( P E R C O N T R A C T O R ) INTERIM DAM BREACH EL. 2126'APPROX. INTERIMIMPOUNDMENT BACKFILLEL. 2106' (PRIOR TOBREACH)INTERIM DAM BREACH EL. 2106' - 2104' I N T E R I M D A M B R E A C H E L . 2 1 0 6 ' - 2 1 0 4 ' LIMI T S O F I N T E R I M D A M BR E A C H E X C A V A T I O N (AP P R O X . ) WEST SEDIMENT POND E A S T S E D I M E N T P O N D C O V E A R E A D I V E R S I O N P U M P ( S E E N O T E 2 ) D I V E R S I O N P U M P ( S E E N O T E 2 ) SLOPESLOPESLOPE P R I N C I P A L S P I L L W A Y & 0 3 2 8 7 / ( 7 3 , 3 ( PRINCIPAL SPILLWAY&03287/(73,3(SILT FENCE(SEE NOTE 4)CHANNEL ID.1982 EAST CHANNEL ID.1982 WEST 1E-1.7 1E-1.9 2 E - 1 . 9 CHANNEL ID.1982 WEST OUTLETCHANNEL ID.1982 EAST OUTLET 2E-1.71E-1.72E-1.7 ROCK CHECK DAM2E-1.8 3E-1.8 EROSIONCONTROLLOGS1E-1.8 TEMPORARY DIVERSIONCHANNEL (PER CONTRACTOR)LIMITS OF DISTURBANCE FOR CHANNELCONSTRUCTION (0.30 ACRES) E A S T U P S T R E A M S E D I M E N T P O N D N O . 2 2 - Y R P O O L E L . 2 1 2 7 . 8 ' 1 0 - Y R P O O L E L . 2 1 2 9 . 2 ' ( S E E N O T E 2 ) E A S T U P S T R E A M S E D I M E N T P O N D N O . 1 2 - Y R P O O L E L . 2 1 2 0 . 9 ' 1 0 - Y R P O O L E L . 2 1 2 2 . 3 ' ( S E E N O T E 2 ) SEE NOT E 3 SEE NOTE 3 E M E R G E N C Y S P I L L W A Y E L . 2 1 2 9 ' E M E R G E N C Y S P I L L W A Y E L . 2 1 2 2 ' T O P O F D A M E L . 2 1 3 2 ' T O P O F D A M E L . 2 1 2 4 ' 2 E 1 . 1 0 Î Î Î Î Î Î T E M P O R A R Y D I V E R S I O N C H A N N E L ( P E R C O N T R A C T O R ) TEMPORARY DIVERSIONCHANNEL (PER CONTRACTOR)Î Î Î Î ÎBAFFLE7E-1.9 B A F F L E 7E-1.9 EROSIONCONTROLLOGS1E-1.815' 1 E 1 . 1 0 RIP RAP BASINENERGY DISSIPATOR 5E-1.8 N E & S C P L A N P H A S E 2 E - 1 . 5 ISS U E / R E V I S I O N D E S C R I P T I O N YREV D M E N G . A P P R . C L I E N T L O G O : R E V I E W E D B Y : S C A L E : D A T U M : P R O J E C T I O N : T I T L E : P R O J E C T : D A T E : D R A W I N G N O . R E V I S I O N N O . P R O J E C T N O . : D R A W N B Y : C L I E N T : 2 8 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 C H A R L O T T E , N C 2 8 2 0 8 T E L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 L I C E N S U R E : N C E N G : F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 A m e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . A S N O T E D 7 8 1 0 1 5 0 2 5 0 2 0 2 - 2 3 - 2 0 1 6 N A V D 8 8 S T A T E P L A N E 8 3 A P T L C W E R O S I O N A N D S E D I M E N T A T I O N C O N T R O L P L A N 1 9 8 2 A S H B A S I N D E C O M M I S S I O N I N G A N D A S H R E M O V A L A S H E V I L L E S T E A M E L E C T R I C G E N E R A T I N G P L A N T B U N C O M B E C O U N T Y , N O R T H C A R O L I N A D U K E E N E R G Y P R O G R E S S , L L C B U N C O M B E C O U N T Y , N O R T H C A R O L I N A I S S U E D F O R P E R M I T 160 23 02 M B L W I N C O R P O R A T E C O M M E N T S 161 25 05 D R S L W AD D R E S S E D D E Q C O M M E N T S 16218 07 J P L W L E G E N D S I L T F E N C E E R O S I O N C O N T R O L L O G S I L T B A S I N W E T L A N D R O C K C H E C K D A M L I M I T S O F D I S T U R B A N C E N O T E S 1 . S E E N O T E S 1 A N D 2 O N D R A W I N G E 1 . 4 F O R B A S I S O F T O P O G R A P H Y . 2 . F O R T H E I N T E R I M D A M B R E A C H , S T O R M W A T E R R E T A I N E D I N A R E A S I M P O U N D E D B Y E A S T U P S T R E A M S E D I M E N T P O N D S 1 & 2 C A N B E P U M P E D E I T H E R T O T H E R I M D I T C H O R T O T H E S E D I M E N T P O N D S , A F T E R S T O R M W A T E R H A S D I S C H A R G E D F R O M T H E E A S T O R W E S T S E D I M E N T P O N D S . 3 . T H E O U T L E T O F T H E D A M B R E A C H S H O W N O N T H I S D R A W I N G I S T O B E T E M P O R A R I L Y G R A D E D T O D R A I N T O T H E S E D I M E N T P O N D S A S S H O W N . A F T E R S T A B I L I Z A T I O N I S A C H I E V E D , T H I S A R E A W I L L B E G R A D E D T O T H E F I N A L C O N T O U R S S H O W N O N T H E D A M D E C O M M I S S I O N I N G D R A W I N G A S V _ C 9 0 1 . 0 0 3 . 0 0 7 . 4 . S I L T F E N C E I S T O B E I N S T A L L E D A P P R O X I M A T E L Y 1 5 ' ( S L O P E D I S T A N C E ) F R O M C R E S T P R I O R T O R E M O V I N G M A T E R I A L F R O M D A M C R E S T . C O N T I N U E S I L T F E N C E I N S T A L L A T I O N D O W N S L O P E T O M A I N T A I N T H I S S L O P E D I S T A N C E A S C R E S T I S L O W E R E D . E A C H E N D O F S I L T F E N C E T O B E L O O P E D T O W A R D S D A M C R E S T . M A I N T A I N A M I N I M U M O F 3 R O W S O F S I L T F E N C I N G S P A C E D A T 1 5 ' O F F S E T ( S L O P E D I S T A N C E ) . I N A D D I T I O N , T H E F I R S T T W O R O W S O F S I L T F E N C I N G S H A L L O U T L E T A S S H O W N O N D E T A I L 2 O F E - 1 . 8 . G R A D E C R E S T E X C A V A T I O N T O D I R E C T R U N O F F T O B A S I N A R E A . A B E R D E E N D R P E P P E R B U S H T R L N E W R O C K W O O D R D INTERSTATE 26 2 1 6 0 2 1 5 0 2 1 6 0 2 1 6 0 2 1 5 0 Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ 1 E - 1 . 7 2E-1.7 2 E - 1 . 7 3 E - 1 . 7 ÎÎÎÎÎÎ Î ÎÎÎÎÎÎ 3 E - 1 . 7 A P P R O X I M A T E A S H E X C A V A T I O N C O N T O U R S ( S E E N O T E 2 ) 1982 ASH BASIN EMBANKMENT C H A N N E L I D . 1 9 8 2 E A S T 1 CHANNEL ID.1982 WESTCHANNEL ID.1982 WEST OUTLET A P P R O X I M A T E L I M I T S O F I M P O U N D M E N T B A C K F I L L ( 1 3 . 5 A C R E S ) P R O P O S E D F I N A L C O N T O U R S E X I S T I N G C O N T O U R S ( T Y P ) C H A N N E L I D . 1 9 8 2 E A S T 2 CHANNEL ID.1982 EAST OUTLET CHANNEL ID.1982 EAST 0 + 0 0 2 + 0 0 4+ 0 0 6+008+0010+0012+0014+0016+0018+0020+0021+83 0 + 0 0 2 + 0 0 4 + 0 0 6 + 0 0 8 + 0 0 10 + 0 0 12+0 0 14+00 15+67 0 + 0 0 2 + 0 0 4 + 0 0 6 + 0 0 8 + 0 0 1 0 + 0 0 1 2 + 0 0 14+0016+0018+0019+27 3 E - 1 . 7 1E-1.72E-1.7 2 E - 1 . 7 1E-1.7 EROSION CONTROL L O G SILT FENCE(SEE NOTE 5)3E-1.8 ROCK CHECK DAM (T Y P ) 2E-1.7 L I M I T S O F D A M B R E A C H E X C A V A T I O N ( 5 . 8 A C R E S ) LIMITS OF DISTURBANCE FOR CHANNELCONSTRUCTION (0.30 ACRES)CONCRETE RIM DITCHWEST SEDIMENT PONDAFTER DAM BREACH E A S T S E D I M E N T P O N D A F T E R D A M B R E A C H P R I N C I P A L S P I L L W A Y & 0 3 2 8 7 / ( 7 3 , 3 ( PRINCIPAL SPILLWAY&03287/(73,3(SLOPE SLOPE 1E-1.9 2 E - 1 . 9 G R A D I N G F O R F I N A L D A M B R E A C H ( S E E N O T E 2 ) CHANNEL ID.1982 WEST 1E-1.7 2 E - 1 . 8 1 E - 1 . 8 T O P O F D A M E L . 2 1 3 2 ' T O P O F D A M E L . 2 1 2 4 ' 7E-1.9 7 E - 1 . 9 Î DURING CONSTRUCTION(SEE NOTE 4) Î D U R I N G C O N S T R U C T I O N ( S E E N O T E 4 ) Î Î Î Î Î D U R I N G C O N S T R U C T I O N ( R E L O C A T E A S S H O W N F O R P E R M A N E N T D I T C H E S F O L L O W I N G S T A B I L I Z A T I O N ) CHECK DAMS SPACED 50' 2 E 1 . 1 0 1 E 1 . 1 0 TEMPORARY BERMSLOPESLOPE5E-1.8ISS U E / R E V I S I O N D E S C R I P T I O N YREV D M E N G . A P P R . C L I E N T L O G O : R E V I E W E D B Y : S C A L E : D A T U M : P R O J E C T I O N : T I T L E : P R O J E C T : D A T E : D R A W I N G N O . R E V I S I O N N O . P R O J E C T N O . : D R A W N B Y : C L I E N T : 2 8 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 C H A R L O T T E , N C 2 8 2 0 8 T E L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 L I C E N S U R E : N C E N G : F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 A m e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . A S N O T E D 7 8 1 0 1 5 0 2 5 0 2 0 2 - 2 3 - 2 0 1 6 N A V D 8 8 S T A T E P L A N E 8 3 A P T L C W E R O S I O N A N D S E D I M E N T A T I O N C O N T R O L P L A N 1 9 8 2 A S H B A S I N D E C O M M I S S I O N I N G A N D A S H R E M O V A L A S H E V I L L E S T E A M E L E C T R I C G E N E R A T I N G P L A N T B U N C O M B E C O U N T Y , N O R T H C A R O L I N A D U K E E N E R G Y P R O G R E S S , L L C B U N C O M B E C O U N T Y , N O R T H C A R O L I N A I S S U E D F O R P E R M I T 160 23 02 M B L W I N C O R P O R A T E C O M M E N T S 161 25 05 D R S L W AD D R E S S E D D E Q C O M M E N T S 16218 07 J P L W N E & S C P L A N P H A S E 3 E - 1 . 6 L E G E N D S I L T F E N C E E R O S I O N C O N T R O L L O G S I L T B A S I N W E T L A N D R O C K C H E C K D A M L I M I T S O F D I S T U R B A N C E T E M P O R A R Y B E R M N O T E S : 1 . S E E N O T E S 1 A N D 2 O N D R A W I N G E 1 . 4 F O R B A S I S O F T O P O G R A P H Y . 2 . F O R T H E F U L L D A M B R E A C H , S T O R M W A T E R R E T A I N E D I N A R E A S I M P O U N D E D B Y E A S T U P S T R E A M S E D I M E N T P O N D S 1 & 2 C A N B E P U M P E D E I T H E R T O T H E R I M D I T C H O R T O T H E E A S T O R W E S T S E D I M E N T P O N D S , A F T E R S T O R M W A T E R H A S D I S C H A R G E D F R O M T H E S E B A S I N S . 3 . T H E O U T L E T O F T H E D A M B R E A C H S H O W N O N T H I S D R A W I N G I S T O B E T E M P O R A R I L Y G R A D E D T O D R A I N T O T H E S E D I M E N T B A S I N S A S S H O W N . A F T E R S T A B I L I Z A T I O N I S A C H I E V E D , T H I S A R E A W I L L B E G R A D E D T O T H E F I N A L C O N T O U R S S H O W N O N T H E D A M D E C O M M I S S I O N I N G D R A W I N G A S V _ C 9 0 1 . 0 0 3 . 0 0 7 . 4 . D U R I N G C O N S T R U C T I O N R O U T E F L O W S T O H E A D O F 5 S E D I M E N T P O N D S . R E S T O R E T O P R O P O S E D P E R I M E T E R C H A N N E L S A F T E R S T A B I L I Z A T I O N . S I L T F E N C E I S T O B E I N S T A L L E D A P P R O X I M A T E L Y 1 5 ' ( S L O P E D I S T A N C E ) F R O M C R E S T P R I O R T O R E M O V I N G M A T E R I A L F R O M D A M C R E S T . C O N T I N U E S I L T F E N C E I N S T A L L A T I O N D O W N S L O P E T O M A I N T A I N T H I S S L O P E D I S T A N C E A S C R E S T I S L O W E R E D . E A C H E N D O F S I L T F E N C E T O B E L O O P E D T O W A R D S D A M C R E S T . M A I N T A I N A M I N I M U M O F 3 R O W S O F S I L T F E N C I N G S P A C E D A T 1 5 ' O F F S E T ( S L O P E D I S T A N C E ) . I N A D D I T I O N , T H E F I R S T T W O R O W S O F S I L T F E N C I N G S H A L L O U T L E T A S S H O W N O N D E T A I L 2 O F E - 1 . 8 . G R A D E C R E S T E X C A V A T I O N T O D I R E C T R U N O F F T O B A S I N A R E A . SEE TABLE SEE TABLE 1 SEE TABLE 1 ASH BASIN STORMWATER CHANNEL DETAIL D50 x 2 8 OZ/SY NONWOVEN GEOTEXTILE FILTER FABRIC SEE TABLE FL O W DE P T H SE E T A B L E FL O W DE P T H PL U S 6 " 4 - NOTE: INSTALL GEOTEXTILE FILTER FABRIC PER MANUFACTURER'S SPECIFICATIONS. 0+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00 11+00 12+00 13+00 14+00 15+00 16+00 17+00 18+00 19+00 20+00 21+00 22+00 2000 2050 2100 2150 2200 2000 2050 2100 2150 2200 PROFILE 1982 WEST & WEST OUTLET CHANNEL 1.9% 1.0% 1.0% 4.0% EXISTING GROUNDPROPOSED STORMWATER CHANNEL 1 - WEST CHANNEL ROCK CHECK DAM (TYP) 1 E-1.9 15.0 % 14.2 % WEST OUTLET CHANNEL 4 - WEST SEDIMENT POND 1.0% 2 E-1.8 RIP RAP BASIN ENERGY DISSIPATOR 5 E-1.8 0+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00 11+00 12+00 13+00 14+00 15+00 16+00 17+00 18+00 19+00 20+00 2000 2050 2100 2150 2200 2000 2050 2100 2150 2200 INTERSECTION CHANNEL 1982 EAST 2 1.6% 1.0% 6.7% 3.5% 5.7% EXISTING GROUND PROPOSED STORMWATER CHANNEL PROFILE 1982 EAST 1, EAST, & EAST OUTLET CHANNEL 2 - EAST 1 CHANNEL EAST CHANNEL EAST OUTLET CHANNEL ROCK CHECK DAM (TYP)2 E-1.8 15.0 % 1.0% 4 - 2 E-1.9 EAST SEDIMENT POND RIP RAP BASIN ENERGY DISSIPATOR 5 E-1.8 0+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00 11+00 12+00 13+00 14+00 15+00 16+00 2050 2100 2150 2200 2050 2100 2150 2200 INTERSECTION CHANNEL 1982 EAST 1.0% 1.0% 2.9% 4.7% 6.9%EXISTING GROUNDPROPOSED STORMWATER CHANNEL PROFILE 1982 EAST 2 CHANNEL 3 - EAST 2 CHANNEL ROCK CHECK DAM (TYP)2 E-1.8 4 - PROFILES & DETAILS E-1.7 ISSUE/REVISION DESCRIPTIONYREVDM ENG.APPR. CLIENT LOGO: REVIEWED BY: SCALE: DATUM: PROJECTION: TITLE: PROJECT: DATE: DRAWING NO. REVISION NO. PROJECT NO.: DRAWN BY: CLIENT: 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL:(704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 Amec Foster Wheeler Environment & Infrastructure, Inc. AS NOTED 7810150250 2 02-23-2016 NAVD 88 STATE PLANE 83 APT LCW EROSION AND SEDIMENTATION CONTROL PLAN 1982 ASH BASIN DECOMMISSIONING AND ASH REMOVAL ASHEVILLE STEAM ELECTRIC GENERATING PLANT BUNCOMBE COUNTY, NORTH CAROLINA DUKE ENERGY PROGRESS, LLC BUNCOMBE COUNTY, NORTH CAROLINA ISSUED FOR PERMIT1602302 MB LW INCORPORATE COMMENTS1612505 DRS LW ADDRESSED DEQ COMMENTS1621807 JP LW A 1 / 3 L L ( V A R I E S ) F L O W A 1 0 ' 2 : 1 G R O U N D L I N E A A N O T E S : 2 : 1 2 : 1 2 : 1 F L O W T O P O F B A N K F L O W L I N E F R O N T E L E V A T I O N # 1 C O A R S E A G G R E G A T E G R O U N D L I N E 1 ' M I N . 1 8 " # 5 7 S T O N E 2 ' 18" 1 2 " 5 7 S T O N E 6 ' 1 ' 1 ' 6 " 24" MAX. 1 8 " F O U N D A T I O N H ( S E E N O T E 3 ) R O C K C H E C K D A M S T H A T A R E D E S I G N A T E D O N T H E P L A N S A S A S T O R M W A T E R M A N A G E M E N T ( S W M ) I T E M A R E T O B E L E F T I N P L A C E A S A P E R M A N E N T I N S T A L L A T I O N . W H E R E D R A I N A G E A R E A S E X C E E D 1 A C R E O R D I T C H G R A D E E X C E E D S 3 P E R C E N T , A T E M P O R A R Y S E D I M E N T F O R E B A Y S H A L L B E I N S T A L L E D W I T H M I N I M U M D I M E N S I O N S O F 1 2 " D E P T H , 2 ' W I D T H A N D 6 ' L E N G T H . I F C H E C K D A M S I S L O C A T E D I N S I D E C L E A R Z O N E A N D A D J A C E N T T O A T R A V E L W A Y , S L O P E F A C I N G O N C O M I N G T R A F F I C I S T O B E 6 : 1 A N D M A X I M U M H I S T O B E 1 2 " . C H E C K D A M S H A L L N O T B E U S E D F O R L O C A T I O N S I N L I V E S T R E A M . L A B H L = H / S W H E R E : H = H E I G H T O F D A M C R E S T I N F E E T S = C H A N N E L S L O P E I N F T / F T L = C H E C K D A M S P A C I N G I N F E E T ; T H E D I S T A N C E S U C H T H A T P O I N T S A A N D B A R E O F E Q U A L E L E V A T I O N S 1 . 2 . 3 . 4 . C H E C K D A M S P A C I N G , L T O B E D E T E R M I N E D F R O M T H E E Q U A T I O N . I N S T E E P S L O P E A R E A S T H E C H E C K D A M S P A C I N G I S N O T T O B E L E S S T H A N 2 5 ' . H E I G H T ( H ) O F C R E S T I S T O B E 3 ' + / - I F C H A N N E L O R S W A L E I S D E E P E N O U G H O R A S D E S I G N A T E D B Y D E S I G N E R . S E D I M E N T F O R E B A Y S E D I M E N T F O R E B A Y ( 1 8 ' M A X . ) 1 2 " F O U N D A T I O N # 1 C O A R S E A G G R E G A T E 2 ' D R Y R I P R A P C L A S S I D R Y R I P R A P C L A S S I R O C K C H E C K D A M N T S 3 - T Y P I C A L D E T A I L F O R R O C K C H E C K D A M T Y P E I F R O N T E L E V A T I O N S E C T I O N A - A S E C T I O N A - A F R O N T E L E V A T I O N S U G G E S T E D R O C K C H E C K D A M S P A C I N G T Y P I C A L D E T A I L F O R R O C K C H E C K D A M T Y P E I I E & S C T Y P I C A L D E T A I L S E - 1 . 8 EROSION CONTROL LOG 12" TEMP EROSIONCONTROL LOG S T A K E L O G O N D O W N H I L L S I D E A T T H E C E N T E R , A T E A C H E N D , A N D A T A D D I T I O N A L P O I N T S A S N E E D E D T O S E C U R E L O G 4 ' M A X . S P A C I N G , O R A S D I R E C T E D . M U L C H C R A D L E U N D E R E R O S I O N C O N T R O L L O G 12" TEMP. EROSIONCONTROL LOGSTAKE LOG ON DOWNHILLSIDE AT THE CENTER ATEACH END. AND AT ADDITIONALPOINTS AS NEEDED TO SECURELOG, OR AS DIRECTED.SHEET FLOWAASECURE ENDOF LOG TOSTAKE (TYP)STAKES ON DOWNHILL SIDEOF LOG AT 8' OC MAX ORAS NEEDED TO SECURE LOG,OR AS DIRECTED.DISTURBED AREAFLOW12" TEMP. EROSIONCONTROL LOG 1'SECURE END OF LOGTO STAKE (TYP) 2 ' 1 ' D I R E C T I O N O F F L O W SECURE E N D S O F LOGS TO STA K E S ( T Y P ) DIRECTI O N OF FLO W NOTES:1.DAILY INSPECTION SHALL BE MADE BY THE CONTRACTOR AND SILT ACCUMULATION MUST BE REMOVED WHEN DEPTH REACHES 6".2.CONTRACTOR SHALL MONITOR THE PERFORMANCE OF LOGS DURING RAINFALL EVENT FOR PROPER PERFORMANCE.3.LOGS SHALL CONSIST OF 100% BIODEGRADABLE, PHOTODEGRADABLE OR RECYCLABLE CONTAINMENT MESH STUFFED WITH FILTER MATE R I A L . 4.STUFF LOGS WITH SUFFICIENT FILTER MATERIAL TO ACHIEVE DENSITY THAT WILL HOLD SHAPE WITHOUT EXCESSIVE DEFORMATION. FILT E R MATERIAL SHALL CONSIST OF MULCH, ASPEN EXCELSIOR WOOD FIBERS, CHIPPED SITE VEGETATION, COCONUT FIBERS,100% RECYCLAB L E F I B E R S , OR ANY OTHER ACCEPTABLE MATERIAL, EXCLUDING STRAW AND HAY.5.STAKES SHALL BE 2" X 2" WOOD, 4' LONG, EMBEDDED SUCH THAT 2" PROTRUDES ABOVE LOG, OR AS DIRECTED. L A P D E T A I L 2 " SE C T I O N A - A PLANPLAN 1'2'2'24"MIN.3' MAX.ATTACH FABRICTO STAKESEXISTINGGROUNDBURY TOEOF FABRIC FABRICSILTBARRIERFLOWMIN. 1.33 lb./LF STEEL POSTS WITH FASTENINGPROJECTION. LENGTH TO BE 5'STANDARD STRENGTHSYNTHETIC FILTER FABRICTRENCH, 8" WIDE X 4" DEEP (TRENCHSHALL BE BACKFILLED AND THE SOILCOMPACTED OVER THE FABRIC MATERIAL)12" OF FABRIC SHALL BE EXTENDEDINTO TRENCH AS SHOWN GROUNDSURFACE 24"24" MIN.SILT FENCE2-1-ISS U E / R E V I S I O N D E S C R I P T I O N YREVDM E N G . A P P R . C L I E N T L O G O : R E V I E W E D B Y : S C A L E : D A T U M : P R O J E C T I O N : T I T L E : P R O J E C T : D A T E : D R A W I N G N O . R E V I S I O N N O . P R O J E C T N O . : D R A W N B Y : C L I E N T : 2 8 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 C H A R L O T T E , N C 2 8 2 0 8 T E L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 L I C E N S U R E : N C E N G : F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 A m e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . A S N O T E D 7 8 1 0 1 5 0 2 5 0 2 0 2 - 2 3 - 2 0 1 6 N A V D 8 8 S T A T E P L A N E 8 3 A P T L C W E R O S I O N A N D S E D I M E N T A T I O N C O N T R O L P L A N 1 9 8 2 A S H B A S I N D E C O M M I S S I O N I N G A N D A S H R E M O V A L A S H E V I L L E S T E A M E L E C T R I C G E N E R A T I N G P L A N T B U N C O M B E C O U N T Y , N O R T H C A R O L I N A D U K E E N E R G Y P R O G R E S S , L L C B U N C O M B E C O U N T Y , N O R T H C A R O L I N A I S S U E D F O R P E R M I T 1602302 M B L W I N C O R P O R A T E C O M M E N T S 1612505 D R S L W AD D R E S S E D D E Q C O M M E N T S 1621807 J P L W NOTES1.SILT FENCE SHALL CONFORM TO THE N O R T H C A R O L I N A D E P A R T M E N T O F E N V I R O N M E N T A L Q U A L I T Y (NCDEQ) EROSION AND SEDIMENT CO N T R O L P L A N N I N G A N D D E S I G N M A N U A L ( N C D E Q E & S C M A N U A L ) , REVISED MAY 2013.2.SILT FENCE SYNTHETIC FILTER FABRI C S H A L L C O N F O R M T O T H E P R O P E R T I E S S H O W N I N T A B L E 6 . 6 2 O F THE NCDEQ E&SC MANUAL.3.CONSTRUCT THE SILT FENCE USING S T A N D A R D S T R E N T H S Y N T H E T I C F I L T E R F A B R I C ( F E N C E SUPPORTED WITH WIRE MESH). SPACI N G O F S T E E L P O S T S S H A L L B E 8 F E E T ( M A X ) . W I R E M E S H S H A L L BE 14 GAGE STEEL WIRE WITH A MESH S P A C I N G O F 6 I N C H E S ( M A X ) . W I R E M E S H ( A N D F A B R I C ) S H A L L B E INSTALLED ON THE UPSLOPE SIDE OF T H E S U P P O R T P O S T S , A N D E X T E N D E D I N T O T H E T R E N C H A T T H E BASE OF THE SILT FENCE. USE WIRE O R P L A S T I C Z I P T I E S W I T H A M I N I M U M T E N S I L E S T R E N G T H O F 5 0 LBS.4.ALTERNATELY, CONSTRUCT THE SILT F E N C E U S I N G E X T R A S T R E N G T H S Y N T H E T I C F I L T E R F A B R I C ( W I R E MESH OMITTED). SPACING OF STEEL P O S T S S H A L L B E 6 F E E T ( M A X ) F O R S I L T F E N C E N O T S U P P O R T E D WITH WIRE MESH. INSTALL FILTER FA B R I C O N T H E U P S L O P E S I D E O F T H E S U P P O R T P O S T S U S I N G W I R E OR ZIP TIES WITH A MINIMUM TENSILE S T R E N G T H O F 5 0 L B S . 5.WHERE FILTER FABRIC REQUIRES A J O I N T , S E C U R E L Y F A S T E N T H E F I L T E R F A B R I C O N L Y A T A S U P P O R T POST WITH A MINIMUM OF 4 FEET OVE R L A P T O T H E N E X T P O S T . 6.DO NOT ATTACH FILTER FABRIC TO EX I S T I N G T R E E S . S I L T F E N C E E N D D E T A I L S I L T F E N C E F I L T E R F A B R I C P O S T . , T Y P . O P T I O N A L 6 " C O M P O S T L A Y E R F I R M L Y A N C H O R E D O P T I O N A L 6 " S U M P R - 3 R O C K A A S H T O # 5 7 6 " M I N . 1 ' M I N . 1 1 ' M I N . 1 O U T L E T C R O S S S E C T I O N S I L T F E N C E F I L T E R F A B R I C O U T L E T C R O S S S E C T I O N P O S T S , T Y P . 3 ' M I N . A A S H T O # 5 7 H E I G H T O F R O C K F I L T E R = 5 / 6 H E I G H T O R S T R A W B A L E S O R F I L T E R F A B R I C F E N C E 1 ' 1 ' 1 ' M I N . 1 ' H A L F P L A N P R O F I L E E D G E O F P O O L R I P R A P N O T S H O W N T O P O F R I [ P R A P A P R O N H O R I Z O N T A L F L O O R 2 : 1 2 : 1 2 : 1 2 : 1 E N T R A N C E C H A N N E L 1 3 A P R O N W I D T H B A S I N L E N G T H D I S S I P A T E R P O O L A P R O N C H A N N E L T O P O F R I P R A P 3 d 5 0 O R 2 d M A X 2 d 5 0 O R 1 . 5 d M A X R i p r a p B a s i n E n e r g y D i s s i p a t o r ( W e s t O u t l e t C h a n n e l ) E n t r a n c e C h a n n e l W i d t h , W O ( f t ) 7 . 5 E n t r a n c e C h a n n e l F l o w D e p t h , Y e ( f t ) 0 . 9 P o o l D e p t h , h S ( f t ) 1 . 5 E x i t C h a n n e l T a i l w a t e r D e p t h , T W ( f t ) 0 . 7 D i s s i p a t o r P o o l L e n g t h , L S ( f t ) 2 2 . 5 A p r o n L e n g t h , L A ( f t ) 7 . 5 T o t a l B a s i n L e n g t h , L B ( f t ) 3 0 . 0 A p r o n W i d t h , W B ( f t ) 2 7 . 5 R i p r a p B a s i n E n e r g y D i s s i p a t o r ( E a s t O u t l e t C h a n n e l ) E n t r a n c e C h a n n e l W i d t h , W O ( f t ) 1 0 . 0 E n t r a n c e C h a n n e l F l o w D e p t h , Y e ( f t ) 1 . 0 P o o l D e p t h , h S ( f t ) 1 . 6 E x i t C h a n n e l T a i l w a t e r D e p t h , T W ( f t ) 0 . 7 D i s s i p a t o r P o o l L e n g t h , L S ( f t ) 3 0 . 0 A p r o n L e n g t h , L A ( f t ) 1 0 . 0 T o t a l B a s i n L e n g t h , L B ( f t ) 4 0 . 0 A p r o n W i d t h , W B ( f t ) 3 6 . 7 E N T R A N C E C H A N N E L F L O W D E P T H P O O L D E P T H T W S I L T F E N C E R O L L E N D TURN END OF ROWSLIGHTLY UPHILL 3 F T . , M A X . S I L T F E N C E O U T L E T 4 - N O T T O S C A L E R I P R A P B A S I N E N E R G Y D I S S I P A T E R 5 - N O T T O S C A L E NOT TO SCALE S I L T F E N C E F I L T E R F A B R I C 2 : 1 1 0 0 ' ( T Y P . ) 15'(TYP.)15'(TYP.) O U T L E T ( T Y P ) S I L T F E N C E S P A C I N G P L A N 4 - TRASH RACK (SEE DETAIL THIS SHEET) EMERGENCY SPILLWAY EL. VARIES RISER INVERT EL. VARIES POND BOTTOM EL. VARIES 5' 2' 1' 2500 PSI CONCRETE BASE #6 BAR BOTH DIRECTIONS 0. 5 ' &03287/(7 &037(( OUTLET EL. VARIES 1% &03287/(7 TOP VIEW STEEL BAND ANTI-VORTEX VANE N0. 4 REBAR WELDED TO BAND ANTI-VORTEX VANE-EXTEND 1/4" STEEL PLATE ACROSS FULL WIDTH OF TRASH RACK AND WELD TO TOP GRATE AND #4 BARS AT SIDES #4 STEEL REINFORCING BAR WELDED TO BAND AND TOP GRATE TO FORM 4" SQUARE GRIDS ALONG SIDES BOLT BAND TO RISER 12 " TRASH RACK TOP GRATE (IRVING STEEL "X-BAR" GRATING TYPE BB- BEARING BAR SIZE 3/4"x1/8", OR EQUAL) CMP RISER SIDE VIEW EAST & WEST SEDIMENT POND DETAILS E-1.9 ISSUE/REVISION DESCRIPTIONYREVDM ENG.APPR. CLIENT LOGO: REVIEWED BY: SCALE: DATUM: PROJECTION: TITLE: PROJECT: DATE: DRAWING NO. REVISION NO. PROJECT NO.: DRAWN BY: CLIENT: 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL:(704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 Amec Foster Wheeler Environment & Infrastructure, Inc. AS NOTED 7810150250 2 02-23-2016 NAVD 88 STATE PLANE 83 APT LCW EROSION AND SEDIMENTATION CONTROL PLAN 1982 ASH BASIN DECOMMISSIONING AND ASH REMOVAL ASHEVILLE STEAM ELECTRIC GENERATING PLANT BUNCOMBE COUNTY, NORTH CAROLINA DUKE ENERGY PROGRESS, LLC BUNCOMBE COUNTY, NORTH CAROLINA ISSUED FOR PERMIT1602302 MB LW INCORPORATE COMMENTS1612505 DRS LW ADDRESSED DEQ COMMENTS1621807 JP LW varies EMBANKMENT 2 1 1% SEE PRINCIPAL SPILLWAY DETAIL (THIS SHEET) POND BOTTOM CMP OUTLET EMBANKMENT CONSTRUCTION DETAIL NTS 4 -- TRASH RACK DETAIL (TYP) NTS PRINCIPAL SPILLWAY DETAIL (TYP) NTS 5 -- 6 -- FAIRCLOTH SKIMMER DISCHARGE SYSTEM WITH OUTLET STRUCTURE INVERT OF LOWEST STORM WATER DISCHARGE OPENING (MINOR STORM EVENT) PRINCIPAL SPILLWAY RISER SCHEDULE 40 PVC PIPE (BARREL OR ARM) PVC VENT PIPE SIDE VIEW (NO SCALE) FLOAT OUTLET PIPE FLEXIBLE HOSE MUST BE SECURELY FASTENED TO THE WATER QUALITY DISCHARGE OPENING MAXIMUM HEIGHT OF FLOAT WHEN NO OTHER STORM WATER DISCHARGE OPENINGS EXIST (MAJOR STORM EVENT) L = 1.4 X DEPTH TO THE OVERFLOW MINIMUM LENGTH APPLIES H STORM WATER DISCHARGE OPENING FLEXIBLE HOSE EARTHEN EMBANKMENT EMERGENCY SPILLWAY MAINTAIN DEPRESSION TO MINIMIZE CHANCE OF SKIMMER BECOMING STUCK PVC VENT PIPE WATER ENTRY UNIT WITH TRASH SCREEN TOP VIEW END VIEW ORIFICE OPENING INSIDE THE HORIZONTAL TUBE WITH A CONSTANT HYDRAULIC HEAD FLOAT WATER ENTRY UNIT FLEXIBLE HOSE SCHEDULE 40 PVC PIPE (BARREL OR ARM) GENERAL NOTES: 1.PROPER DESIGN MUST BE COMPLETED TO MINIMIZE PIPING AROUND DISCHARGE PIPE. 2.PROPER ORIFICE OPENING MUST BE SELECTED TO ENSURE POND DRAINS IN CORRECT AMOUNT OF TIME. MODIFICATIONS MAY BE REQUIRED IF FIELD CONDITIONS WARRANT A CHANGE. 3.EMBANKMENT MUST BE COMPACTED TO DESIGN SPECIFICATIONS. 4.EMERGENCY SPILLWAY MUST BE CORRECTLY SIZED AND EROSION PROTECTION INSTALLED. 5.EROSION PROTECTION MUST BE INSTALLED ALONG THE EMBANKMENT AND AT THE DISCHARGE END OF THE PIPE. 6.INSPECT SYSTEM REGULARLY TO ENSURE IT IS FUNCTIONING IN A CORRECT MANNER. 7.EIGHT SIZES OF SKIMMERS ARE AVAILABLE, REFER TO THE FLOW SHEET, CUT SHEET, AND INSTRUCTIONS ON WEB SITE FOR EACH SIZE. 8.WEST SEDIMENT POND SHALL INCLUDE 5" ORFICE DIAMETER FAIRCLOTH SKIMMER, EAST SEDIMENT POND SHALL INCLUDE 4" ORFICE DIAMETER FAIRCLOTH SKIMMER 3 -- WEST SEDIMENT POND NTS 1 - PLAN VIEW PROFILE SECTION 74 ' 324' 74' 9' 9' 2: 1 2:1 2:1 2: 1 324' 2:1 2:1 2:1 2:1 2:1 2:1 EAST SEDIMENT POND NTS 2 - PLAN VIEW PROFILE SECTION 72 ' 312' 72' 8' 8' 2: 1 2:1 2:1 2: 1 312' NOTE: SEE 1982 WEST CHANNEL DETAIL 4 ON SHEET E-1.7 FOR EMERGENCY SPILLWAY DETAILS. NOTE: SEE 1982 EAST CHANNEL DETAIL 4 ON SHEET E-1.7 FOR EMERGENCY SPILLWAY DETAILS. BAFFLE DETAIL NTS 7 -- CLASS B STONE PAD (4' X 4' X 1' MIN.) (3) POROUS BAFFLES SPACED @ 1 4 BASIN LENGTH 74 ' 2:1 2:1 2:1 2:1 2:1 2:1 (3) POROUS BAFFLES SPACED @ 1 4 BASIN LENGTH 21602150TOP OF DAM EL. 2124'3-EAST UPSTREAM SEDIMENT POND NO. 12-YR POOL EL. 2120.9'10-YR POOL EL. 2122.3'DIVERSION PUMP EMERGENCY SPILLWAY EL. 2122'01 020+001+002+003+004+004+20 0+001+002+002+35 2120211021202112ASH EXCAVATION CONTOURS CROSS SE C T I O N A L I G N M E N T ( T Y P ) 2 1 6 0 D I V E R S I O N P U M P E A S T U P S T R E A M S E D I M E N T P O N D N O . 2 2 - Y R P O O L E L . 2 1 2 7 . 8 ' 1 0 - Y R P O O L E L . 2 1 2 9 . 2 ' E M E R G E N C Y S P I L L W A Y E L . 2 1 2 9 ' T O P O F D A M E L . 2 1 3 2 ' 4 - 0 3 0 4 0 + 0 0 1 + 0 0 2 + 0 0 3 + 0 0 4 + 0 0 4 + 7 5 0+00 1+00 2+002+27 2130 2130 2120 2120 A S H E X C A V A T I O N C O N T O U R S C R O S S S E C T I O N A L I G N M E N T ( T Y P ) 5'3131EMERGENCY SPILLWAY DETAILEAST UPSTREAM SEDIMENT POND NO. 1 D50 x 28 OZ/SY NONWOVENGEOTEXTILE FILTER FABRIC CLASS 2 RIP RAP3-NOTE:INSTALL GEOTEXTILE FILTER FABRIC PERMANUFACTURER'S SPECIFICATIONS.TOP OF POND EL. 2124'2'SPILLWAY EL. 2122'10-YR POOL EL. 2122.3' 5 ' 3 1 3 1 E M E R G E N C Y S P I L L W A Y D E T A I L E A S T U P S T R E A M S E D I M E N T P O N D N O . 2 D 5 0 x 2 8 O Z / S Y N O N W O V E N G E O T E X T I L E F I L T E R F A B R I C C L A S S 2 R I P R A P 4 - N O T E : I N S T A L L G E O T E X T I L E F I L T E R F A B R I C P E R M A N U F A C T U R E R ' S S P E C I F I C A T I O N S . T O P O F P O N D E L . 2 1 3 2 ' 3' S P I L L W A Y E L . 2 1 2 9 ' 1 0 - Y R P O O L E L . 2 1 2 9 . 2 ' 2075 2100 21502075210021500+000+501+001+502+002+503+003+504+004+202075210021502075210021500+000+501+001+502+002+35 CROSS SECTION 01CROSS SECTION 02 TOP OF DAM EL. 2124'ASH EXCAVATION SURFACE 2112 20'10-YR POOL EL. 2122.3'EMERGENCY SPILLWAY EXISTING GROUNDTOP OF DAM EL. 2124'PROPOSED GROUND PROPOSED GROUND 2 0 7 5 2 1 0 0 2 1 5 0 2 0 7 5 2 1 0 0 2 1 5 0 0 + 0 0 0 + 5 0 1 + 0 0 1 + 5 0 2 + 0 0 2 + 5 0 3 + 0 0 3 + 5 0 4 + 0 0 4 + 5 0 4 + 7 5 2 0 7 5 2 1 0 0 2 1 5 0 2 0 7 5 2 1 0 0 2 1 5 0 0 + 0 0 0 + 5 0 1 + 0 0 1 + 5 0 2 + 0 0 2 + 2 7 C R O S S S E C T I O N 0 3 C R O S S S E C T I O N 0 4 E M E R G E N C Y S P I L L W A Y E X I S T I N G G R O U N D T O P O F D A M E L . 2 1 3 2 ' T O P O F D A M E L . 2 1 3 2 ' E X I S T I N G G R O U N D 2 1 1 2 2 0 ' 1 0 - Y R P O O L E L . 2 1 2 9 . 2 ' P R O P O S E D G R O U N D P R O P O S E D G R O U N D N E A S T U P S T R E A M S E D I M E N T P O N D D E T A I L S E - 1 . 1 0 ISS U E / R E V I S I O N D E S C R I P T I O N YREVDM E N G . A P P R . C L I E N T L O G O : R E V I E W E D B Y : S C A L E : D A T U M : P R O J E C T I O N : T I T L E : P R O J E C T : D A T E : D R A W I N G N O . R E V I S I O N N O . P R O J E C T N O . : D R A W N B Y : C L I E N T : 2 8 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 C H A R L O T T E , N C 2 8 2 0 8 T E L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 L I C E N S U R E : N C E N G : F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 A m e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . A S N O T E D 7 8 1 0 1 5 0 2 5 0 2 0 2 - 2 3 - 2 0 1 6 N A V D 8 8 S T A T E P L A N E 8 3 A P T L C W E R O S I O N A N D S E D I M E N T A T I O N C O N T R O L P L A N 1 9 8 2 A S H B A S I N D E C O M M I S S I O N I N G A N D A S H R E M O V A L A S H E V I L L E S T E A M E L E C T R I C G E N E R A T I N G P L A N T B U N C O M B E C O U N T Y , N O R T H C A R O L I N A D U K E E N E R G Y P R O G R E S S , L L C B U N C O M B E C O U N T Y , N O R T H C A R O L I N A I S S U E D F O R P E R M I T 1602302 M B L W I N C O R P O R A T E C O M M E N T S 1612505 D R S L W AD D R E S S E D D E Q C O M M E N T S 1621807 J P L W N P L A N V I E W E A S T U P S T R E A M S E D I M E N T P O N D N O . 2 P L A N V I E W E A S T U P S T R E A M S E D I M E N T P O N D N O . 1 1 - 2 - E&SC NOTES E-1.11 ISSUE/REVISION DESCRIPTIONYREVDM ENG.APPR. CLIENT LOGO: REVIEWED BY: SCALE: DATUM: PROJECTION: TITLE: PROJECT: DATE: DRAWING NO. REVISION NO. PROJECT NO.: DRAWN BY: CLIENT: 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL:(704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 Amec Foster Wheeler Environment & Infrastructure, Inc. AS NOTED 7810150250 2 02-23-2016 NAVD 88 STATE PLANE 83 APT LCW EROSION AND SEDIMENTATION CONTROL PLAN 1982 ASH BASIN DECOMMISSIONING AND ASH REMOVAL ASHEVILLE STEAM ELECTRIC GENERATING PLANT BUNCOMBE COUNTY, NORTH CAROLINA DUKE ENERGY PROGRESS, LLC BUNCOMBE COUNTY, NORTH CAROLINA ISSUED FOR PERMIT1602302 MB LW INCORPORATE COMMENTS1612505 DRS LW ADDRESSED DEQ COMMENTS1621807 JP LW SELF-INSPECTIONS EFFECTIVE OCTOBER 1, 2010, PERSONS RESPONSIBLE FOR LAND DISTURBING ACTIVITIES MUST INSPECT THE SEDIMENT AND EROSION CONTROL MEASURES ON A PROJECT AFTER EACH PHASE OF THE PROJECT TO MAKE SURE THAT THE APPROVED EROSION AND SEDIMENTATION CONTROL PLAN IS BEING FOLLOWED. SELF-INSPECTION REPORTS ARE REQUIRED. A SAMPLE SELF-INSPECTION REPORT, AS WELL AS DETAILS OF THE SELF-INSPECTION PROGRAM, CAN BE FOUND ON THE LAND QUALITY WEB SITE: HTTP://PORTAL.NCDENR.ORG/WEB/LR/EROSION AS A MINIMUM, THE INSPECTIONS SHALL BE PERFORMED AFTER EACH OF THE FOLLOWING PHASES OF A PLAN: 1.INSTALLATION OF PERIMETER EROSION AND SEDIMENT CONTROL MEASURES. 2.INSTALLATION OF SILT TRAPS/BASINS. 3.CLEARING AND GRUBBING OF EXISTING GROUND COVER. 4.COMPLETION OF ANY PHASE OF GRADING THAT REQUIRES PROVISION OF STABILIZATION. 5.INSTALLATION OF MEASURES DURING ANY PHASE OF THE PROJECT. 6.COMPLETION OF CONSTRUCTION OR DEVELOPMENT. 7.INSTALLATION OF STORMWATER RETENTION MEASURES. 8.QUARTERLY UNTIL THE ESTABLISHMENT OF PERMANENT GROUND COVER IS FULLY ESTABLISHED. GENERAL SEEDING SPECIFICATIONS SEEDBED PREPARATION INSTALL NECESSARY MECHANICAL EROSION AND SEDIMENTATION CONTROL PRACTICES BEFORE SEEDING, AND COMPLETE GRADING ACCORDING TO THE APPROVED PLAN. APPLY LIME AND FERTILIZER IN ACCORDANCE WITH REQUIREMENTS SET FORTH IN THE PROVISIONS OF THE APPROVED NCDOT HIGHWAY ENCROACHMENT AND INCORPORATE INTO THE TOP 4-6 INCHES OF SOIL BY DISKING OR OTHER SUITABLE MEANS. A FAVORABLE pH RANGE FOR PLANT GROWTH IS USUALLY 6.0-6.5. SEEDBED SHOULD HAVE ENOUGH FINE-GRAINED (SILT AND CLAY) MATERIAL TO MAINTAIN ADEQUATE MOISTURE AND NUTRIENT SUPPY AND BE FREE FROM LARGE ROOTS, BRANCHES, STONES, LARGE CLODS OF EARTH, OR TRASH. 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 APPLY SEED UNIFORMLY TO ENSURE EVEN DISTRIBUTION OF SEED ACROSS THE ENTIRE DISTURBED AREA AT RATES SHOWN IN THE SEEDING SPECIFICATIONS. MULCH ALL PLANTINGS IMMEDIATELY AFTER SEEDING. 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. TEMPORARY SEEDING SPECIFICATIONS THE FOLLOWING SEEDING SPECIFICATIONS ARE A GENERAL RECOMMENDATION. PROPERTY OWNERS MAY REQUEST A DIFFERENT SEEDING MIXTURE BASED ON EXISTING VEGETATION. SPECIES*RATE (LB/ACRE) RYE GRAIN (SECALE CEREALE)120 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 GROWN IS NOT FULLY ADEQUATE. RESEED, RE-FERTILIZE AND MULCH IMMEDIATELY FOLLOWING EROSION OR OTHER DAMAGE. PERMANENT SEEDING SPECIFICATIONS THE FOLLOWING SEEDING SPECIFICATIONS ARE A GENERAL RECOMMENDATION. PROPERTY OWNERS MAY REQUEST A DIFFERENT SEEDING MIXTURE BASED ON EXISTING VEGETATION. SPECIES*RATE (LB/ACRE) TALL FESCUE 40 CROWN VETCH 20 REDTOP 5 NURSE PLANTS BETWEEN MAY 1 AND AUG 15, ADD 10 LB/ACRE GERMAN MILLET (SETARIA ITALICA) OR 15 LB/ACRE SUDAN GRASS. PRIOR TO MAY 1 OR AFTER AUG 15, ADD 40 LB/ACRE RYE GRAIN (SECALE CEREALE) SOIL AMENDMENTS APPLY LIME AND FERTILIZER ACCORDING TO SOIL TESTS, OR APPLY 4,000 LB/ACRE GROUND AGRICULTURAL LIMESTONE AND 1,000 LB/ACRE 10-10-10 FERTILIZER. MULCH APPLY 4,000-5,000 LB/ACRE GRAIN STRAW OR EQUIVALENT COVER OF ANOTHER SUITABLE MULCHING MATERIAL. ANCHOR MULCH BY TACKING WITH ASPHALT, ROVING OR NETTING. NETTING IS THE PREFERRED ANCHORING METHOD ON STEEP SLOPES. MAINTENANCE RESEED, FERTILIZE AND MULCH DAMAGED AREAS IMMEDIATELY. MAY BE MOWED ONCE OR TWICE A YEAR, BUT MOWING IS NOT NECESSARY. EROSION & SEDIMENT CONTROL PLAN - DESCRIPTION 1.THE EROSION AND SEDIMENT CONTROL MEASURES PROVIDED DURING GRADING OPERATIONS WILL GENERALLY CONSIST OF THE FOLLOWING: a.PLACING EROSION CONTROL LOGS PERPENDICULAR TO STORMWATER FLOWS WITHIN THE BACKFILL LIMITS. b.CONSTRUCTING SILT BASINS TO CAPTURE SEDIMENT. c.CONSTRUCTING ROCK CHECK DAMS ALONG STORMWATER CHANNELS. d.PLACING SILT FENCES ALONG THE DOWNSTREAM FACE OF THE DAM. 2.ALL AREAS OF LAND DISTURBANCE ASSOCIATED WITH DAM DECOMMISSIONING WILL BE RESTORED AND STABILIZED BY SEEDING AFTER COMPLETION OF THE WORK. 3.GRADING ACTIVITIES WILL NOT BE PERFORMED IN STREAMS, TRIBUTARIES, OR WETLAND AREAS. SCHEDULE DUKE ENERGY WILL BE RESPONSIBLE FOR COORDINATION AND SCHEDULING OF THE DAM DECOMMISSIONING. THE WORK IS CURRENTLY SCHEDULED TO START ON 9/30/2016 AND TO BE COMPLETED BY 3/30/2017. CONSTRUCTION SEQUENCE PHASE 1 1.PRECONSTRUCTION MEETING WILL BE CONDUCTED TO CONFIRM THE SCOPE AND REQUIREMENTS FOR THE WORK. 2.CONTRACTOR WILL MARK LIMITS OF DISTURBANCE IN THE FIELD ACCORDING TO THE LIMITS SHOWN ON THE EROSION AND SEDIMENT CONTROL PLANS. 3.INSTALL UPSTREAM SEDIMENT (DIVERSION) BASINS AND PUMPS: TWO DIVERSION BASINS WILL BE CONSTRUCTED AT THE LOCATIONS SHOWN ON THE DRAWINGS TO MAINTAIN A DRY FILL AREA, TO THE DEGREE POSSIBLE. THE BASINS WILL CAPTURE UPLAND WATER AND DIVERT IT TO THE RIM DITCH BY PUMPING. THE BASINS ARE SIZED TO CONTAIN THE 2 YEAR RUNOFF WITHOUT DISCHARGE TO THE RIM DITCH AND ARE TO BE EVACUATED BY PUMPS FOLLOWING EACH RAINFALL EVENT. PUMPS WILL ALSO BE PROVIDED AND MAINTAINED WITHIN THE FILL AREA BELOW THESE BASINS TO KEEP THE FILL PLACEMENT AREA DEWATERED. THE PUMPS WILL DISCHARGE TO THE RIM DITCH. 4.PRIOR TO THE GRADING ACTIVITIES ON THE DAM SECTION SILT FENCE WILL BE INSTALLED ALONG THE DOWNSTREAM FACE OF THE DAM AS SHOWN ON SHEET E-1.4. 5.EXCAVATE DAM MATERIALS: THE EXCAVATION OF THE EXISTING EMBANKMENT WILL PROCEED BY MAINTAINING A RELATIVELY LEVEL CREST HEIGHT AND PROVIDING EXCAVATION GRADES TO DIRECT STORM WATER TOWARD THE IMPOUNDMENT AND THE EROSION CONTROL MEASURES THEREIN. 6.PLACE FILL MATERIALS: FILL MATERIAL FROM THE EMBANKMENT WILL BE PLACED IN THE BASIN AREA IN RELATIVELY HORIZONTAL LIFTS (GRADED TOWARD THE FILL ABUTMENTS TO PROMOTE DRAINAGE). SUMPS AND OR DEPRESSIONS IN THE FILL GRADING SHOULD BE CREATED AT THE LIMITS OF THE FILL TO CAPTURE THE DRAINAGE AND PROVIDE A LOCATION FOR THE PUMPS. 7.PLACE EROSION CONTROL LOGS DURING FILL PLACEMENT: DURING FILL PLACEMENT, THE CONTRACTOR WILL GRADE THE FILL SURFACE AS DESCRIBED ABOVE AND PLACE EROSION CONTROL LOGS IN INACTIVE FILL AREAS TO REDUCE SEDIMENT LOADS. THE CONTRACTOR WILL ALSO SMOOTH ROLL AREAS TO PROMOTE SHEET FLOW TO THE DEGREE PRACTICAL PRIOR TO RAINFALL EVENTS. PHASE 2 1.CONSTRUCT EAST AND WEST SEDIMENT BASINS PRIOR TO BREACHING THE DAM. 2.THE DAM BREACH WILL BE INITIATED ONCE THE PROBABLE MAXIMUM PRECIPITATION (PMP) CONTAINMENT IS NO LONGER ACHIEVED DUE TO THE LOWERING OF THE DAM TO ELEVATION IS 2126' THE NOTCH EXCAVATION AT BOTH ABUTMENTS WILL BE PERFORMED TO DIRECT DRAINAGE TO THE IMPOUNDMENT AREA AND THE EAST AND WEST SEDIMENT PONDS 3.PRIOR TO THE GRADING ACTIVITIES ON THE DAM SECTION SILT FENCE WILL BE INSTALLED ALONG THE DOWNSTREAM FACE OF THE DAM AS SHOWN ON SHEET E-1.5. 4.THE FILL WILL THEN BE BROUGHT TO FINAL GRADES WITH THE REMAINING DAM GRADED TO THE EAST AND WEST SEDIMENT PONDS. . 5.CONSTRUCT E&SC MEASURES ALONG REMAINING AREAS: EROSION CONTROL LOGS, ROCK CHECK DAMS, AND SILT BASINS WILL BE CONSTRUCTED CONCURRENT WITH GRADING ACTIVITIES ONCE THE DAM HAS BEEN BREACHED AND WILL BE MODIFIED AND ADJUSTED AS THE PROJECT PROGRESSES. FOLLOWING FILL ACTIVITIES, THE CONTRACTOR IS TO INSTALL THE FINAL DITCHES AND EROSION CONTROL MEASURES AS SHOWN ON THE DRAWINGS. PHASE 3 EROSION AND SEDIMENT CONTROL NOTES 1.BEFORE LAND DISTURBING ACTIVITIES OCCUR, ALL EROSION AND SEDIMENT CONTROL MEASURES AS SHOWN ON THE DRAWINGS SHOULD BE INSTALLED. OPERATIONS SHOULD BE LIMITED TO AREAS NECESSARY FOR INSTALLATION OF THESE EROSION AND SEDIMENT CONTROL MEASURES. 2.ALL DISTURBED AREAS SHALL BE STABILIZED WITHIN 14 WORKING DAYS FOLLOWING COMPLETION OF LAND DISTURBING ACTIVITIES. IF THERE ARE MORE STRINGENT SOIL STABILIZATION GUIDELINES PUT IN PLACE BY LOCAL, COUNTY, STATE OR FEDERAL AGENCIES OR CALLED FOR BASED ON PERMIT REQUIREMENTS, THEN THE MORE STRINGENT GUIDELINES SHALL CONTROL AND GOVERN ON THE PROJECT. 3.SEEDED AREAS SHALL BE FERTILIZED, RESEEDED AS NECESSARY AND MULCHED ACCORDING TO THE SEEDING PLAN TO MAINTAIN A VIGOROUS, DENSE VEGETATIVE COVER. SEEDED AREAS SHALL BE INSPECTED PERIODICALLY BY DUKE ENERGY OR THEIR REPRESENTATIVE UNTIL FINAL GROUND COVER HAS BEEN ESTABLISHED. THE CONTRACTOR IS RESPONSIBLE FOR RESTORING VEGETATION TO ITS ORIGINAL CONDITION, OR BETTER, FOR UP TO A YEAR. SEE SEEDING SPECIFICATIONS ON THIS SHEET. 4.ALL EROSION CONTROL DEVICES SHALL BE PROPERLY MAINTAINED UNTIL THE COMPLETION OF GRADING ACTIVITIES AND DISTURBED AREAS HAVE BEEN STABILIZED. TEMPORARY EROSION CONTROL DEVICES SHALL BE REMOVED ONCE WORK IS COMPLETE AND THE SITE IS STABILIZED. 5.SEDIMENT AND EROSION CONTROL DEVICES AND PLANTED AREAS SHALL BE INSPECTED BY DUKE ENERGY OR THEIR REPRESENTATIVE EVERY SEVEN (7) CALENDAR DAYS AND AFTER EACH RAINFALL OCCURRENCE THAT EXCEEDS ONE-HALF (0.5) INCH IN A 24-HOUR PERIOD. DAMAGED OR INEFFECTIVE DEVICES SHALL BE REPAIRED OR REPLACED, AS NECESSARY, AS SOON AS PRACTICAL. 6.REMOVE SEDIMENT FROM BEHIND CONTROL DEVICES WHEN THE ACCUMULATED MATERIAL REACHES ONE-HALF THE HEIGHT OF THE SILT FENCE OR OTHER CONTROL DEVICES AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN EVENT AND TO REDUCE PRESSURE ON THE FENCE OR DEVICE. AVOID UNDERMINING THE FENCE OR DEVICE DURING CLEANOUT. RESET AND/OR REPLACE FENCE OR DEVICE AS REQUIRED THROUGHOUT CONSTRUCTION. 7.STABILIZATION MEASURES SHALL BE INITIATED AS SOON AS PRACTICABLE IN PORTIONS OF THE SITE WHERE CONSTRUCTION ACTIVITIES HAVE TEMPORARILY OR PERMANENTLY CEASED, BUT IN NO CASE MORE THAN SEVEN ( 7) DAYS FOR PERIMETER AREAS AND SLOPES GREATER THAN 3H:1V AND NO MORE THAN FOURTEEN (14) DAYS FOR OTHER AREAS AFTER WORK HAS CEASED. 8.CONTRACTOR SHALL STABILIZE AREA STEEPER THAN 3H:1V WITHIN 7 DAYS. E&SC NOTES E-1.12 ISSUE/REVISION DESCRIPTIONYREVDM ENG.APPR. CLIENT LOGO: REVIEWED BY: SCALE: DATUM: PROJECTION: TITLE: PROJECT: DATE: DRAWING NO. REVISION NO. PROJECT NO.: DRAWN BY: CLIENT: 2801 YORKMONT ROAD, SUITE 100 CHARLOTTE, NC 28208 TEL:(704) 357-8600 FAX: (704) 357-8638 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 Amec Foster Wheeler Environment & Infrastructure, Inc. AS NOTED 7810150250 2 02-23-2016 NAVD 88 STATE PLANE 83 APT LCW EROSION AND SEDIMENTATION CONTROL PLAN 1982 ASH BASIN DECOMMISSIONING AND ASH REMOVAL ASHEVILLE STEAM ELECTRIC GENERATING PLANT BUNCOMBE COUNTY, NORTH CAROLINA DUKE ENERGY PROGRESS, LLC BUNCOMBE COUNTY, NORTH CAROLINA ISSUED FOR PERMIT1602302 MB LW INCORPORATE COMMENTS1612505 DRS LW ADDRESSED DEQ COMMENTS1621807 JP LW EROSION AND SEDIMENTATION CONTROL PLAN PRELIMINARY REVIEW CHECKLIST THE FOLLOWING ITEMS SHALL BE INCORPORATED WITH RESPECT TO SPECIFIC SITE CONDITIONS, IN AN EROSION & SEDIMENTATION CONTROL PLAN: NPDES CONSTRUCTION STORMWATER GENERAL PERMIT NCG010000 ______ DESIGNATION ON THE PLANS WHERE THE 7 OR 14 DAY GROUND STABILIZATION REQUIREMENTS APPLY PER SECTION II.B.2 OF THE PERMIT. ______ DESIGN OF BASINS WITH ONE ACRE OR MORE OF DRAINAGE AREA FOR SURFACE WITHDRAWAL AS PER SECTION II.B.4 OF THE PERMIT. LOCATION INFORMATION ______PROJECT LOCATION & LABELED VICINITY MAP (ROADS, STREETS, LANDMARKS) ______NORTH ARROW AND SCALE ______IDENTIFY RIVER BASIN. ______ PROVIDE A COPY OF SITE LOCATED ON APPLICABLE USGS QUADRANGLE AND NRCS SOILS MAPS IF IT IS IN A RIVER BASIN WITH RIPARIAN BUFFER REQUIREMENTS. GENERAL SITE FEATURES (PLAN ELEMENTS) _____PROPERTY LINES & OWNERSHIP ID FOR ADJOINING PROPERTIES _____EXISTING CONTOURS (TOPOGRAPHIC LINES) _____PROPOSED CONTOURS _____LIMITS OF DISTURBED AREA (PROVIDE ACREAGE TOTAL, DELINEATE LIMITS, AND LABEL). BE SURE TO INCLUDE ALL ACCESS TO MEASURES, LOTS THAT WILL BE DISTURBED, AND UTILITIES THAT MAY EXTEND OFFSITE. _____PLANNED AND EXISTING BUILDING LOCATIONS AND ELEVATIONS _____PLANNED & EXISTING ROAD LOCATIONS & ELEVATIONS, INCLUDING TEMPORARY ACCESS ROADS _____LOT AND/OR BUILDING NUMBERS _____HYDROGEOLOGIC FEATURES: ROCK OUTCROPS, SEEPS, SPRINGS, WETLAND AND THEIR LIMITS, STREAMS, LAKES, PONDS, DAMS, ETC. (INCLUDE ALL REQUIRED LOCAL OR STATE BUFFER ZONES AND ANY DWQ RIPARIAN BUFFER DETERMINATIONS) _____EASEMENTS AND DRAINAGEWAYS, PARTICULARLY REQUIRED FOR OFFSITE AFFECTED AREAS. INCLUDE COPIES OF ANY RECORDED EASEMENTS AND/OR AGREEMENTS WITH ADJOINING PROPERTY OWNERS. _____PROFILES OF STREETS, UTILITIES, DITCH LINES, ETC. _____STOCKPILED TOPSOIL OR SUBSOIL LOCATIONS _____IF THE SAME PERSON CONDUCTS THE LAND-DISTURBING ACTIVITY & ANY RELATED BORROW OR WASTE ACTIVITY, THE RELATED BORROW OR WASTE ACTIVITY SHALL CONSTITUTE PART OF THE LAND-DISTURBING ACTIVITY UNLESS THE BORROW OR WASTE ACTIVITY IS REGULATED UNDER THE MINING ACT OF 1971, OR IS A LANDFILL REGULATED BY THE DIVISION OF WASTE MANAGEMENT. IF THE LAND-DISTURBING ACTIVITY AND ANY RELATED BORROW OR WASTE ACTIVITY ARE NOT CONDUCTED BY THE SAME PERSON, THEY SHALL BE CONSIDERED SEPARATE LAND-DISTURBING ACTIVITIES AND MUST BE PERMITTED EITHER THROUGH THE SEDIMENTATION POLLUTION CONTROL ACT AS A ONE-USE BORROW SITE OR THROUGH THE MINING ACT. ______LOCATION AND DETAILS ASSOCIATED WITH ANY ONSITE STONE CRUSHING OR OTHER PROCESSING OF MATERIAL EXCAVATED. IF THE AFFECTED AREA ASSOCIATED WITH EXCAVATION, PROCESSING, STOCKPILES AND TRANSPORT OF SUCH MATERIALS WILL COMPRISE 1 OR MORE ACRES, AND MATERIALS WILL BE LEAVING THE DEVELOPMENT TRACT, A MINING PERMIT WILL BE REQUIRED. ______REQUIRED ARMY CORPS 404 PERMIT AND WATER QUALITY 401 CERTIFICATION (E.G. STREAM DISTURBANCES OVER 150 LINEAR FEET) EROSION & SEDIMENT CONTROL MEASURES (ON PLAN) ______LEGEND (PROVIDE APPROPRIATE SYMBOLS FOR ALL MEASURES AND REFERENCE THEM TO THE CONSTRUCTION DETAILS) _____LOCATION OF TEMPORARY MEASURES _____LOCATION OF PERMANENT MEASURES _____CONSTRUCTION DRAWINGS AND DETAILS FOR TEMPORARY AND PERMANENT MEASURES. SHOW MEASURES TO SCALE ON PLAN AND INCLUDE PROPOSED CONTOURS WHERE NECESSARY. ENSURE DESIGN STORAGE REQUIREMENTS ARE MAINTAINED THROUGH ALL PHASES OF CONSTRUCTION. _____MAINTENANCE REQUIREMENTS FOR MEASURES _____CONTACT PERSON RESPONSIBLE FOR MAINTENANCE SITE DRAINAGE FEATURES _____EXISTING AND PLANNED DRAINAGE PATTERNS (INCLUDE OFF-SITE AREAS THAT DRAIN THROUGH PROJECT AND ADDRESS TEMPORARY AND PERMANENT CONVEYANCE OF STORMWATER OVER GRADED SLOPES) _____METHOD USED TO DETERMINE ACREAGE OF LAND BEING DISTURBED AND DRAINAGE AREAS TO ALL PROPOSED MEASURES (E.G. DELINEATION MAP) _____SIZE, PIPE MATERIAL AND LOCATION OF CULVERTS AND SEWERS _____SOIL INFORMATION: TYPE, SPECIAL CHARACTERISTICS _____SOIL INFORMATION BELOW CULVERT STORM OUTLETS _____NAME AND CLASSIFICATION OF RECEIVING WATER COURSE OR NAME OF MUNICIPAL OPERATOR (ONLY WHERE STORMWATER DISCHARGES ARE TO OCCUR) STORMWATER CALCULATIONS _____PRE-CONSTRUCTION RUNOFF CALCULATIONS FOR EACH OUTLET FROM THE SITE (AT PEAK DISCHARGE POINTS). BE SURE TO PROVIDE ALL SUPPORTING DATA FOR THE COMPUTATION METHODS USED (RAINFALL DATA FOR REQUIRED STORM EVENTS, TIME OF CONCENTRATION/STORM DURATION, AND RUNOFF COEFFICIENTS). _____DESIGN CALCULATIONS FOR PEAK DISCHARGES OF RUNOFF (INCLUDING THE CONSTRUCTION PHASE & THE FINAL RUNOFF COEFFICIENTS FOR THE SITE) _____DESIGN CALCS FOR CULVERTS AND STORM SEWERS (INCLUDE HW, TW AND OUTLET VELOCITIES) _____DISCHARGE AND VELOCITY CALCULATIONS FOR OPEN CHANNEL AND DITCH FLOWS (EASEMENT & RIGHTS-OF-WAY) _____DESIGN CALCS FOR CROSS SECTIONS AND METHOD OF STABILIZATION FOR EXISTING AND PLANNED CHANNELS (INCLUDE TEMPORARY LININGS). INCLUDE APPROPRIATE PERMISSIBLE VELOCITY AND/OR SHEAR STRESS DATA. _____DESIGN CALCS AND CONSTRUCTION DETAILS FOR ENERGY DISSIPATERS BELOW CULVERT AND STORM SEWER OUTLETS (INCLUDE STONE/MATERIAL SPECS & APRON DIMENSIONS). AVOID DISCHARGES ON FILL SLOPES. _____DESIGN CALCS AND DIMENSION OF SEDIMENT BASINS (NOTE CURRENT SURFACE AREA AND DEWATERING STANDARDS AS WELL AS DIVERSION OF RUNOFF TO THE BASINS). BE SURE THAT ALL SURFACE DRAINS, INCLUDING DITCHES AND BERMS, WILL HAVE POSITIVE DRAINAGE TO THE BASINS. VEGETATIVE STABILIZATION _____AREA & ACREAGE TO BE STABILIZED WITH VEGETATION _____METHOD OF SOIL PREPARATION _____SEED TYPE & RATES (TEMPORARY & PERMANENT) _____FERTILIZER TYPE AND RATES _____MULCH TYPE AND RATES (INCLUDE MULCH ANCHORING METHODS TO BE USED) NOTE:PLAN SHOULD INCLUDE PROVISIONS FOR GROUNDCOVER IN ACCORDANCE WITH NPDES CONSTRUCTION STORMWATER GENERAL PERMIT NCG010000 AND PERMANENT GROUNDCOVER FOR ALL DISTURBED AREAS WITHIN 15 WORKING DAYS OR 90 CALENDAR DAYS (WHICHEVER IS SHORTER) FOLLOWING COMPLETION OF CONSTRUCTION OR DEVELOPMENT. FINANCIAL RESPONSIBILITY/OWNERSHIP FORM _____COMPLETED, SIGNED & NOTARIZED FR/O FORM _____ACCURATE APPLICATION FEE PAYABLE TO NCDENR ($65.00 PER ACRE ROUNDED UP THE NEXT ACRE WITH NO CEILING AMOUNT) _____CERTIFICATE OF ASSUMED NAME, IF THE OWNER IS A PARTNERSHIP _____NAME OF REGISTERED AGENT (IF APPLICABLE) _____COPY OF THE MOST CURRENT DEED FOR THE SITE. PLEASE MAKE SURE THE DEED(S) AND OWNERSHIP INFORMATION ARE CONSISTENT BETWEEN THE PLAN SHEETS, LOCAL RECORDS AND THIS FORM. _____PROVIDE LATITUDE & LONGITUDE (IN DECIMAL DEGREES) AT THE PROJECT ENTRANCE. NOTE:FOR THE EXPRESS PERMITTING OPTION, INQUIRE AT THE LOCAL REGIONAL OFFICE FOR AVAILABILITY. NARRATIVE AND CONSTRUCTION SEQUENCE _____NARRATIVE DESCRIBING THE NATURE & PURPOSE OF THE CONSTRUCTION ACTIVITY _____CONSTRUCTION SEQUENCE RELATED TO EROSION AND SEDIMENT CONTROL (INCLUDING INSTALLATION OF CRITICAL MEASURES PRIOR TO THE INITIATION OF THE LAND-DISTURBING ACTIVITY & REMOVAL OF MEASURES AFTER AREAS THEY SERVE ARE PERMANENTLY STABILIZED). ADDRESS ALL PHASES OF CONSTRUCTION AND NECESSARY PRACTICES ASSOCIATED WITH TEMPORARY STREAM BYPASSES AND/OR CROSSINGS. _____BID SPECIFICATIONS RELATED ONLY TO EROSION CONTROL x x x x x x x x x x x x NA x NA x NA NA NA NA x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 2 STORMWATER MANAGEMENT PLAN ASV C901.013.001 REV. 0 F F` iak j.' Adr Xc�l lil'drui -t,KA4i?L,trAlt+e4 '� z Llor�llaal Bli_k c N R N A ,. 5 ' „ta-vq " -" 74 �'andl•�� i Billet ,i r • ... Fors>f. A h' Arden - , FIS13AH { ;{ G .. , - v •i, ., F, ck 4.t,71� . -. Palk. t I 1 } Ii "Ise i I.jzI Sli,r Lour.,! rVakn-9€a[ Ely,•,ah - Park t r I a>t s c f- Pc tah y F, Irt P sir Flat Rock "z SITE VICINITY MAP - 1" = 5 MILES MAP SOURCE: ESRI WORLD TOPOGRAPHIC BASEMAP �r .,.. .. SITE VICINITY MAP - 1" = 2000' MAP SOURCE: ESRI WORLD TOPOGRAPHIC BASEMAP CONTACT INFORMATION OWNER: DUKE ENERGY PROGRESS, LLC ADDRESS: 526 SOUTH CHURCH STREET CHARLOTTE, NORTH CAROLINA 28202 ENGINEER AMEC FOSTER WHEELER ADDRESS: 2030 FALLING WATERS ROAD, SUITE 300 KNOXVILLE, TENNESSEE 37932 PHONE: 865-671-6774 ASHEVILLE PLANT 200 CP&L DR. BUNCOMBE COUNTY, NC LATITUDE: 35.47145', LONGITUDE: 82.54220' SITE VICINITY MAP - 1" = 500' MAP SOURCE: ESRI WORLD TOPOGRAPHIC BASEMAP SHEET LIST TABLE SHEET NUMBER SHEET TITLE RESPONSIBLE ENGINEERING FIRM ASV_C901.013.001 COVER SHEET AMEC FOSTER WHEELER ASV C901.013.002 PRE -CONSTRUCTION LAND COVER AMEC FOSTER WHEELER ASV C901.013.003 PRE -CONSTRUCTION USGS CONTOURS AMEC FOSTER WHEELER ASV C901.013.004 NARRATIVE AND CONSTRUCTION SEQUENCING BURNS & McDONNELL ASV_C901.013.005 FINAL GRADING AND DRAINAGE BURNS & McDONNELL ASV C901.013.006 STORMWATER BASIN DETAILS AMEC FOSTER WHEELER ASV C901.013.007 CULVERT SECTION BURNS & McDONNELL ASV_C901.013.008 CULVERT SECTION BURNS & McDONNELL REVT—DATE JOB NO. PROJECT TYPE I DES DFTR CHKD' ENGR ! APPD 6 DESCRIPTION STORMWATER BASIN DETAILS NORTH CAROLINA STATE MAP MAP SOURCE: USGS COUNTY DIGITAL MAPS Environment & Infrastructure 2030 FALLING WATERS ROAD, SUITE 300 KNOXVILLE, TN 37922 TEL: (865) 671-6774 FAX: (865) 671-6254 LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247 ", a m e c foster wheeler TITLE STORMWATER MANAGEMENT PLAN 1982 ASH BASIN - BUNCO 089 COVER SHEET FOR ISSUED FOR PERMITTING ---�-- SEAL DUKE ENERGY ' SCALE: AS SHOWN DES: APT ---- DWG TYPE: DWG DFTR: APT 101 6 20 BO: 7810160620 D: MID8 DATE: ENG FILENAME: ASV_C901.013.001 COVER SHEET.dwg APPD: DWG SIZE DRAWING NO. REVISION ANSI D 22"x34" ASV C901.013.001 0 — — C) W O pot F INCHES 2 3 ITENTHS 10 20 30 0 5 Plotted By: Bishop, Matt Sheet Set: Stormwater Mqmt Plan 1982 Basin Lavout: COVER SHEET September 28, 2016 12: 40: 24Dm P:\CADD\Proiects\7810\7810160620 Asheville\Stormwater Mgmt Plan 1982 Basin\Plansheets\ASV_C901.013.001 COVER SHEET.dwq 10 ASV C901.013.002 IREV. 0 IUNDARY EXISTING NPDES OUTFALL 001 F --� LOCATION 1230NORTHWEST I I � ASHEVILLE STEAM ELECTRIC I I GENERATING PLANT - \ I 1 I 1 \ \ 1 1\ \ / 1964 ASH BASIN LIMITS 1. (APPROXIMATE) � ��. INTERSTATE 26 \ JULIAN \ \\ 1964 ASH BASIN 1982 ASH BASIN LIMITS \ K \ \ (APPROXIMATE) \ II (\ PROPERTY BOUNDARY \ J I 1 FRENCH BROAD RIVER (CLASS B RECEIVING WATER) ® \` 1982 ASH BASIN \ L e \ \ \ \ \ \ \ \ TITLE DESCRIPTION 6 Environment & Infrastructure 2030 FALLING WATERS amec ROAD. SUITE N 3 KNOXVILLETN foster 74 FAX (866)6716254 wheeler LICENSURE:1-fi264 NOENS FA NO ENO NO GEOLOGY:C-24] SEAL NOTE: 1. PROPERTY BOUNDARY WAS OBTAINED FROM BUNCOMBE COUNTY GIs DATA. 2. AERIAL PHOTO DATED 9-24-1964 SOURCE BY USGS. 3. PROJECT LOCATION IS IN THE FRENCH BROAD RIVER BASIN. 4. AERIAL PHOTO SHOWN DOES NOT REPRESENT CURRENT SITE CONDITIONS. LEGEND — — — — ASH BASIN LIMITS (APPROXIMATE) PROPERTY BOUNDARY ___----- PRE1982 BASIN WATERSHED BOUNDARY(119.1 AC) 00 , 200 400 FT STORMWATER MANAGEMENT PLAN 1982 ASH BASIN - BUNCO 089 PRE -CONSTRUCTION LAND COVER FOR ISSUED FOR PERMITTING �' DUKE ENERGY. SCALE: SHOWN DES: APT DWG TYPE:E: DWG DFTB: APT JOB DATE:009-27-201820 ENG FILENAME: ASV_C901.013.002 PRE -CONSTRUCTION LAND COVER.dwg APPD: DWG SIZE DRAWING NO. REVISION ANSI D 22"x34" ASV C901.013.002 0 9 I 10 W O N A O INCHES 10 20 30 Plotted Bx Bishop, Matt Sheet Set Stormwater Mgmt Plan 1982 Basin Layout: PRE —CONSTRUCTION LAND COVER September 28, 2016 12:18:090m P:\CADD\Proiects\7810\7810160620 Asheville\Storm water Mqmt Plan 1982 Basin\Plonsheets\ASV—C901.013.002 PRE —CONSTRUCTION LAND COVER.dwq ---- ---'---------- |--------- � ----�-- ------'------- | / / / —--/ V C901 0+U 3 003 NOTE: 1. PROPERTY BOUNDARY WAS OBTAINED FROM BUNCOMBE COUNTY G|SDATA. 2. BASE MAP TAKEN FROM 8KYLAND.NOTHCAROL|NAUSGS QUADRANGLE DATED 1885. 3. PROJECT LOCATION {S\NTHE FRENCH BROAD RIVER BASIN. 4. USGQQUADRANGLE DOES NOT REPRESENT CURRENT SITE CONDITIONS. ASH BASIN LIMITS (APPROXIMATE) -------------' PROPERTY BOUNDARY PRE1S82 BASIN WATERSHED |^" Uri c" 1 2 3 |'="'°" 10 20 30 - _L- __| ____�- L '--- - -- P|otted BvBinhop. Matt Sheet Set:Storrnwoter Mqmt Plan 1982 Basin Loyou t:PRE- CONSTRUCTION USG5 CONTOURS September 28, 2016 12:19:55prn P:\CADD\Proiecto\7810\7810160020 AoheviUe\Stnrrnwnter Momt Plan 1982 Basin \P|onsheots\ASV_C9O1.01J.O03 PRE -CONSTRUCTION U3GS CONTOURS.d°q 10 11 12 13 14 15 16 1. THE EROSION AND SEDIMENT CONTROL MEASURES PROVIDED DURING GRADING OPERATIONS SHALL GENERALLY CONSIST OF THE FOLLOWING: a. PLACING EROSION CONTROL LOGS PERPENDICULAR TO STORMWATER FLOWS WITHIN THE DITCH LIMITS. b. UTILIZING PHASE 1 SEDIMENT BASINS TO CAPTURE SEDIMENT TO FULLEST EXTENT POSSIBLE. c. CONSTRUCTING ROCK CHECK DAMS ALONG STORMWATER CHANNELS. d. PLACING SILT FENCES ALONG THE SITE PAD AND TOE OF SLOPE LIMITS. e. PLACING RIP RAP IN DITCH AREAS AS SHOWN IN PLANS. 2. ALL AREAS OF LAND DISTURBANCE ASSOCIATED WITH SITE PAD GRADING, ACCESS ROAD GRADING, AND BORROW AREAS SHALL BE RESTORED AND STABILIZED BY SEEDING AFTER COMPLETION OF THE WORK. 3. GRADING ACTIVITIES SHALL NOT BE PERFORMED IN STREAMS, TRIBUTARIES, OR WETLAND AREAS. CrHFni It F DUKE ENERGY SHALL BE RESPONSIBLE FOR COORDINATION AND SCHEDULING OF THE PHASE 2 CONSTRUCTION. THE WORK IS CURRENTLY SCHEDULED TO START ON 2/1/2017 AND TO BE COMPLETED BY 11/1/2017. CONSTRI ICTION SFOI IFNCF THIS SECTION SUMMARIZES THE SEQUENCING OF THE E&SC MEASURES REQUIRED DURING THE PROJECT. SPECIFIC DETAILS AND NOTES ARE SHOWN ON THE PERMIT DRAWINGS. EROSION CONTROL DEVICES SHALL BE CONSTRUCTED ACCORDING TO DETAILS ON DRAWING E-2.2, OR AS DESIGNED BY AMEC FOR THE PHASE 1 ASH REMOVAL, UNTIL REMOVAL OF SUCH DEVICES OR BASINS BECOMES NECESSARY. THE SEQUENCING IS NOT INTENDED TO CONTROL SPECIFIC MEANS AND METHODS OF PERFORMING THE WORK, BUT RATHER TO PROVIDE THE CONTRACTOR KNOWLEDGE OF NECESSARY CONTROLS MEASURES USED DURING THE SEQUENCE OF WORK WHICH WILL CONTROL EROSION OR DIRECT RUNOFF DURING GRADING. CERTAIN ASSUMPTIONS FOR THIS GRADING HAVE BEEN MADE FOR DIRECTION OF FLOWS DURING GRADING OPERATIONS. CONTINIIFD ASH RFMOVAI REMOVAL FROM THE 1982 ASH BASIN MAY BE ON -GOING WHILE PHASE 2 GRADING BEGINS. THE CONTRACTOR(S) ON SITE SHALL BE COORDINATING TO ENSURE E&SC MEASURES ARE BEING UTILIZED FOR THE CONTINUED ASH REMOVAL OPERATIONS AS WELL AS THE NEW GRADING FOR PHASE 2. TWO DIVERSION SUMPS HAVE BEEN CONSTRUCTED IN PHASE 1, IN ADDITION TO TWO (2) SEDIMENT BASINS AFTER THE DAM BREACH OCCURS. THE CONTINUED USE OF THESE BASINS SHALL BE COORDINATED WITH THE ON -GOING ASH REMOVAL OPERATIONS AND THE CONSTRUCTION OF THE PHASE 2 GRADING. SEE AMEC'S PHASE 1 ASH REMOVAL DRAWINGS FOR ADDITIONAL INFORMATION ON LOCATION, SIZE AND CAPACITY OF THESE BASINS. THE FOLLOWING IS A GENERAL SUMMARY OF THE E&SC MEASURES THAT SHALL BE INSTALLED AS THE ASH REMOVAL (PHASE 1) PROCEEDS: (A COLOR CODED DRAWING HAS BEEN PROVIDED WHICH OUTLINES THE LIMITS OF DISTURBANCE FOR EACH STAGE OF CONSTRUCTION) STAGE 1 INSTAI I ATION OF OITCHFS TEMPORARY COI 1 ECTION BASINS ANO COORDINATION WITH PHASE 1 0 CONSTRUCT NORTH PERIMETER DITCHING AND INSTALL ROCK DITCH CHECKS 0 CONSTRUCT WEST PERIMETER DITCHING AND INSTALL ROCK DITCH CHECKS 0 UTILIZE EASTERN AMEC DITCHING UNTIL ROADWAY DITCH HAS BEEN CONSTRUCTED O UTILIZE AMEC'S SEDIMENT POND NO. 1 IN PLACE UNTIL NEW ACCESS ROADWAY CONSTRUCTION REACHES THIS POND. (ACCESS ROADWAY GRADING SHALL BEGIN FROM NEW ROCKWOOD ROAD AND PROCEED TOWARD SEDIMENT POND NO. 1) 0 CONSTRUCT TEMPORARY DITCHES WITHIN PAD FILL AREA TO CARRY WATER TO PERIMETER DITCHES DURING PAD GRADING O UTILIZE EASTERN AND WESTERN SEDIMENT PONDS IN PLACE AFTER DAM BREACH 0 SEED AND MULCH LIMITS OF DISTURBANCE FOR STAGE 1 GRADING. THE NEW PLANT PAD GRADING BEGINS WITH THE INSTALLATION OF PERIMETER DITCHING AS SHOWN THE (PHASE 2) PLANS. THE CONTRACTOR(S) SHALL CONSTRUCT THE PERMANENT DITCHES ON THE NORTH AND WEST WIDE OF THE NEW PLANT PAD WHILE LEAVING AMEC SEDIMENT PONDS NO. 1 & 2 IN PLACE. ALL WATER SHALL CONTINUE TO UTILIZE BOTH OF THE AMEC BASINS DURING THE STAGE 1 GRADING OPERATIONS. STAGE 2 NORTH HAI F OF PAD GRAOIN(� 0 PAD GRADING BEGINS FROM NORTH SIDE AND PROCEEDS ABOUT % WAY THROUGH THE PAD GRADING TO THE SOUTH 0 WATER SHALL BE DIRECTED FROM THE MIDDLE OF THE PAD GRADING AREA EQUALLY TO THE NORTHWEST PERIMETER DITCH AND TO THE EAST. EROSION CONTROL LOGS SHALL BE USE TO ARREST PRIMARY SILT AS PAD GRADING PROGRESSES. THESE ARE EASIER TO ADJUST AND CAN BE MOVED AND REUSED AS GRADING PROGRESSES. 0 REMOVE SEDIMENT POND NO. 2 NEAR THE END OF STAGE 2 GRADING 0 UTILIZE SEDIMENT POND NO. 1, EASTERN AND WESTERN SEDIMENT PONDS IN PLACE AFTER DAM BREACH 0 RESEED STAGE 1 AREA AS NECESSARY UNTIL VEGETATION HAS BEEN ESTABLISHED 0 SEED AND MULCH LIMITS OF DISTURBANCE FOR STAGE 2 GRADING. TO PROMOTE CONTROLLED RUNOFF, THE CONTRACTOR SHALL GRADE THE EMBANKMENT WHICH WILL DIRECT RUNOFF TO THE NEW DITCHING, ROCK DITCH CHECKS, AND BASINS. THOSE AREAS WHICH HAVE BEEN ROUGH GRADED PER THE GRADING PLAN SHALL BE VEGETATED AS SOON AS WORK HAS BEEN COMPLETED IN THOSE AREAS. IT IS ANTICIPATED THAT THE ASH REMOVAL WILL BE COMPLETED BY THE END OF STAGE 2. STAGE 3 gnUTH HAI F OF PAD GRAD1NG 0 CONTINUE PAD GRADING IN THE MIDDLE OF THE PAD FOR THE SOUTHERN HALF 0 WATER SHALL BE DIRECTED FROM THE MIDDLE OF THE PAD GRADING AREA EQUALLY TO THE NORTHWEST PERIMETER DITCH AND TO THE EAST. MULTIPLE ROWS OF EROSION CONTROL LOGS SHALL BE USE TO ARREST PRIMARY SILT AS PAD GRADING PROGRESSES. THESE ARE EASIER TO ADJUST AND CAN BE MOVED AND REUSED, AND WILL REDUCE THE SILT LOAD FOR THE SILT FENCE WHICH IS LOCATED AT THE TOP PERIMETER OF THE PAD 0 UTILIZE SEDIMENT POND NO. 1, EASTERN AND WESTERN SEDIMENT PONDS IN PLACE AFTER DAM BREACH 0 RESEED STAGE 2 AREA AS NECESSARY UNTIL VEGETATION HAS BEEN ESTABLISHED 0 SEED AND MULCH LIMITS OF DISTURBANCE FOR STAGE 3 GRADING. TO PROMOTE CONTROLLED RUNOFF, THE CONTRACTOR SHALL GRADE THE EMBANKMENT WHICH WILL DIRECT RUNOFF TO THE EXISTING WESTERN AND EASTERN DITCHING. THOSE AREAS WHICH HAVE BEEN ROUGH GRADED PER THE GRADING PLAN SHALL BE VEGETATED AS SOON AS WORK HAS BEEN COMPLETED IN THOSE AREAS. IT IS ANTICIPATED THAT THE ASH REMOVAL WILL BE COMPLETED BY THE END OF STAGE 3. STAGE 4 rONSTRIICTION OF NFW ArrF.CS ROAD WAYS 0 REMOVE AMEC SEDIMENT POND NO. 1 AND CONSTRUCT NEW ACCESS ROADWAY FROM NEW ROCKWOOD ROAD TO SEDIMENT POND NO. 1. 0 REMOVE SEDIMENT POND NO. 1 AND COMPLETE NEW ACCESS ROADWAY GRADING 0 CONSTRUCT NEW CULVERTS AND EASTERN DITCHING 0 UTILIZE EASTERN AND WESTERN SEDIMENT PONDS IN PLACE AFTER DAM BREACH. 0 PAD GRADING PLACEMENT IS ANTICIPATED TO BEGIN ON THE NORTH SIDE OF THE PAD SITE AND PROCEED TO THE SOUTH TOWARD THE DAM BREACH AREA AS IDENTIFIED ON THE AMEC PLANS. (PHASE 1). STAGE 5 COMPI FTION OF GRADING 0 INSTALL RIPRAP IN DITCHES AND AT CULVERT OUTLETS PER PLAN. ALL RUNOFF FROM THIS NEWLY GRADED AREA SHALL BE INTERCEPTED INTO THE DITCHES AS SHOWN AND FLOW TO THE EAST AND WEST SEDIMENT BASINS AS DESIGNED BY AMEC. THESE BASINS BUILT BY THE ASH REMOVAL CONTRACTOR(S) SHALL REMAIN IN PLACE FOR THE DURATION OF CONSTRUCTION OF THE NEW FACILITY, AND SHALL BE MAINTAINED BY DUKE OR THEIR CONTRACTOR(S) UNTIL SUCH A TIME AS THE OLD PLANT IS DECOMMISSIONED. 0 OWNER SHALL NOTIFY NCDEQ, LAND QUALITY, AND THE ASHEVILLE REGIONAL OFFICE WHEN MAJOR GRADING ACTIVITIES HAVE BEEN COMPLETED AND PERMANENT EROSION CONTROL MEASURES HAVE BEEN INSTALLED. ADDITIONAL DETAILS REGARDING THE CONSTRUCTION SEQUENCE AND SCOPE OF WORK ARE SHOWN ON THE ATTACHED PROJECT DRAWINGS. EROSION AND SEDIMENT CONTROI NOTE.,; 1. BEFORE LAND DISTURBING ACTIVITIES OCCUR, ALL EROSION AND SEDIMENT CONTROL MEASURES AS SHOWN ON THE DRAWINGS SHOULD BE INSTALLED. OPERATIONS SHOULD BE LIMITED TO AREAS NECESSARY FOR INSTALLATION OF THESE EROSION AND SEDIMENT CONTROL MEASURES. 2. ALL DISTURBED AREAS SHALL BE STABILIZED WITHIN 14 WORKING DAYS FOLLOWING COMPLETION OF LAND DISTURBING ACTIVITIES. IF THERE ARE MORE STRINGENT SOIL STABILIZATION GUIDELINES PUT IN PLACE BY LOCAL, COUNTY, STATE OR FEDERAL AGENCIES OR CALLED FOR BASED ON PERMIT REQUIREMENTS, THEN THE MORE STRINGENT GUIDELINES SHALL CONTROL AND GOVERN ON THE PROJECT. 3. SEEDED AREAS SHALL BE FERTILIZED, RESEEDED AS NECESSARY AND MULCHED ACCORDING TO THE SEEDING PLAN TO MAINTAIN A VIGOROUS, DENSE VEGETATIVE COVER. SEEDED AREAS SHALL BE INSPECTED PERIODICALLY BY DUKE ENERGY OR THEIR REPRESENTATIVE UNTIL FINAL GROUND COVER HAS BEEN ESTABLISHED. THE CONTRACTOR IS RESPONSIBLE FOR RESTORING VEGETATION TO ITS ORIGINAL CONDITION, OR BETTER, FOR UP TO A YEAR. SEE SEEDING SPECIFICATIONS ON THIS SHEET. 4. ALL EROSION CONTROL DEVICES SHALL BE PROPERLY MAINTAINED UNTIL THE COMPLETION OF GRADING ACTIVITIES AND DISTURBED AREAS HAVE BEEN STABILIZED. TEMPORARY EROSION CONTROL DEVICES SHALL BE REMOVED ONCE WORK IS COMPLETE AND THE SITE IS STABILIZED. 5. SEDIMENT AND EROSION CONTROL DEVICES AND PLANTED AREAS SHALL BE INSPECTED BY DUKE ENERGY OR THEIR REPRESENTATIVE EVERY SEVEN (7) CALENDAR DAYS AND AFTER EACH RAINFALL OCCURRENCE THAT EXCEEDS ONE-HALF (0.5) INCH IN A 24-HOUR PERIOD. DAMAGED OR INEFFECTIVE DEVICES SHALL BE REPAIRED OR REPLACED, AS NECESSARY, AS SOON AS PRACTICAL. 6. REMOVE SEDIMENT FROM BEHIND CONTROL DEVICES WHEN THE ACCUMULATED MATERIAL REACHES ONE-HALF THE HEIGHT OF THE SILT FENCE OR OTHER CONTROL DEVICES AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN EVENT AND TO REDUCE PRESSURE ON THE FENCE OR DEVICE. AVOID UNDERMINING THE FENCE OR DEVICE DURING CLEANOUT. RESET AND/OR REPLACE FENCE OR DEVICE AS REQUIRED THROUGHOUT CONSTRUCTION. 7. STABILIZATION MEASURES SHALL BE INITIATED AS SOON AS PRACTICABLE IN PORTIONS OF THE SITE WHERE CONSTRUCTION ACTIVITIES HAVE TEMPORARILY OR PERMANENTLY CEASED, BUT IN NO CASE MORE THAN SEVEN (7) DAYS FOR PERIMETER AREAS AND SLOPES GREATER THAN 3HAV AND NO MORE THAN FOURTEEN (14) DAYS FOR OTHER AREAS AFTER WORK HAS CEASED. 8. CONTRACTOR SHALL STABILIZE AREA STEEPER THAN 3HAV WITHIN 7 DAYS. EFFECTIVE OCTOBER 1, 2010, PERSONS RESPONSIBLE FOR LAND DISTURBING ACTIVITIES MUST INSPECT THE SEDIMENT AND EROSION CONTROL MEASURES ON A PROJECT AFTER EACH PHASE OF THE PROJECT TO MAKE SURE THAT THE APPROVED EROSION AND SEDIMENTATION CONTROL PLAN IS BEING FOLLOWED. SELF -INSPECTION REPORTS ARE REQUIRED. A SAMPLE SELF -INSPECTION REPORT, AS WELL AS DETAILS OF THE SELF -INSPECTION PROGRAM, CAN BE FOUND ON THE LAND QUALITY WEB SITE: HTTP://PORTAL. NCDENR.ORG/WEB/LR/EROSION AS A MINIMUM, THE INSPECTIONS SHALL BE PERFORMED AFTER EACH OF THE FOLLOWING PHASES OF A PLAN: 1. INSTALLATION OF PERIMETER EROSION AND SEDIMENT CONTROL MEASURES. 2. INSTALLATION OF SILT TRAPS/BASINS. 3. AFTER EACH RAINFALL EVENT EXCEEDING 1/2 INCH IN A 24-HOUR PERIOD. 4. CLEARING AND GRUBBING OF EXISTING GROUND COVER. 5. COMPLETION OF ANY PHASE OF GRADING THAT REQUIRES PROVISION OF STABILIZATION. 6. INSTALLATION OF MEASURES DURING ANY PHASE OF THE PROJECT. 7. COMPLETION OF CONSTRUCTION OR DEVELOPMENT. 8. INSTALLATION OF STORMWATER RETENTION MEASURES. 9. QUARTERLY UNTIL THE ESTABLISHMENT OF PERMANENT GROUND COVER IS FULLY ESTABLISHED. SFFDRFD PREPARATION INSTALL NECESSARY MECHANICAL EROSION AND SEDIMENTATION CONTROL PRACTICES BEFORE SEEDING, AND COMPLETE GRADING ACCORDING TO THE APPROVED PLAN. APPLY LIME AND FERTILIZER IN ACCORDANCE WITH REQUIREMENTS SET FORTH IN THE PROVISIONS OF THE APPROVED NCDOT HIGHWAY ENCROACHMENT AND INCORPORATE INTO THE TOP 4-6 INCHES OF SOIL BY DISKING OR OTHER SUITABLE MEANS. A FAVORABLE pH RANGE FOR PLANT GROWTH IS USUALLY 6.0-6.5. SEEDBED SHOULD HAVE ENOUGH FINE-GRAINED (SILT AND CLAY) MATERIAL TO MAINTAIN ADEQUATE MOISTURE AND NUTRIENT SUPPLY AND BE FREE FROM LARGE ROOTS, BRANCHES, STONES, LARGE CLODS OF EARTH, OR TRASH. 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. APPLY SEED UNIFORMLY TO ENSURE EVEN DISTRIBUTION OF SEED ACROSS THE ENTIRE DISTURBED AREA AT RATES SHOWN IN THE SEEDING SPECIFICATIONS. MULCH ALL PLANTINGS IMMEDIATELY AFTER SEEDING. MAINTFNANC:F 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. TEMPORARY SEEDING SPECIFICATIONS THE FOLLOWING SEEDING SPECIFICATIONS ARE A GENERAL RECOMMENDATION. PROPERTY OWNERS MAY REQUEST A DIFFERENT SEEDING MIXTURE BASED ON EXISTING VEGETATION. SPECIES RATE (I RI R/ACRFI RYE GRAIN (SECALE CEREALE) 120 SOII AMENDMENTS FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 LB/ACRE GROUND AGRICULTURAL LIMESTONE AND 750 LB/ACRE 10-10-10 FERTILIZER. MITI rH 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. MAINTFNANC RE -FERTILIZE IF GROWTH IS NOT FULLY ADEQUATE. RESEED, RE -FERTILIZE AND MULCH IMMEDIATELY FOLLOWING EROSION OR OTHER DAMAGE. PERMANENT SEEDING SPECIFICATIONS THE FOLLOWING SEEDING SPECIFICATIONS ARE A GENERAL RECOMMENDATION. PROPERTY OWNERS MAY REQUEST A DIFFERENT SEEDING MIXTURE BASED ON EXISTING VEGETATION. SPECIES RATF(I R/ACRFI TALLFESCUE 40 CROWN VETCH 20 REDTOP 5 NI IRSF PI ANTS BETWEEN MAY 1 AND AUG 15, ADD 10 LB/ACRE GERMAN MILLET (SETARIA ITALICA) OR 15 LB/ACRE SUDAN GRASS. PRIOR TO MAY 1 OR AFTER AUG 15, ADD 40 LB/ACRE RYE GRAIN (SECALE CEREALE). ';Oil AMENDMENTS APPLY LIME AND FERTILIZER ACCORDING TO SOIL TESTS, OR APPLY 4,000 LB/ACRE GROUND AGRICULTURAL LIMESTONE AND 1,000 LB/ACRE 10-10-10 FERTILIZER. MULCH APPLY 4,000-5,000 LB/ACRE GRAIN STRAW OR EQUIVALENT COVER OF ANOTHER SUITABLE MULCHING MATERIAL. ANCHOR MULCH BY TACKING WITH ASPHALT, ROVING OR NETTING. NETTING IS THE PREFERRED ANCHORING METHOD ON STEEP SLOPES. MAINTFNANCF RESEED, FERTILIZE AND MULCH DAMAGED AREAS IMMEDIATELY. MAY BE MOWED ONCE OR TWICE A YEAR, BUT MOWING IS NOT NECESSARY. VE AND C 4 ARn�f�,,, BURNS CONSTRNARRATIUCT ON ro aS10, 0 SEAL r�. �_ � MSDONNELLSEQUENCING DUKE project contract _=2.a p41290 — THESE DOCUMENTS WERE PREPARED UNDER THE DIRECT SUPERVISION OF 9400 WARD PARKWAY ENERGY s617U I ANDREW E. FRIES, PE # 041290. OJ4- KANSAS CITY, MO 64114 816-333-9400 ® drawing no. rev. 1 7/18/16 JT AF REVISED CONSTRUCTION SEQUENCE LICENSE # C-1435 ASV C901.013.004 0 1 i t\ 9-28-201 s no. I date I by I ckd I description designed detailed J. TRONSON I A. REICHERT sheet file NOTES.d n \\bmcd\dfs\Clients\ENR\DukeEnrgyPro\86170_DukeAsheville\Design\Civil\D*gs\Ne*\Buncombe County Storm*oter Permit\Notes.dgn jsttonson 9/28/2016 1 2 3 4 5 6 7 8 9 10 00 0000o nm, o x LEGEND O xnzs.9 � �' VOLUME 8TORMWATER O � LQD — LIMITS OF DISTURBANCEPROPOSED GRADING LIMIT "N` x i69.B m x uNv - SEDIMENT BASIN iu \ / s IsN• Isue x 0 EXISTING STORMWATER CHANNEL x3fi x'I`�' 0 ❑ - . ►--►--►--►PROPOSED STORMWATER CHANNEL 41- 0 PRE -DEVELOPMENT SUBAREA 0 � _ � POST -DEVELOPMENT SUBAREA ,.�, x so NOTES 1 '"" 1. EXISTING TOPOGRAPHY PROVIDED BY xx } DUKE ENERGY DATED 2 \ ll` 2. APPLY TEMPORARY SEEDING ON AREAS THAT WILL NOT BE GRADED FOR/f 21 DAYS " 3. SEE OTHER SHEETS FOR ADDITIONAL PERMANEN \ STORMWATER INFORMATION I� PROPOSED FOUNDATION o � nvm� zou I J GRAVEL ACCESS E 'ux INSTALL 60" x 170' NCDOT HDPE / WITH CONCRETE ENDWALLS SEE CULVERT SHEET FOR ADDITIONAL INFORMATION - y ' � W LIMITS OF DISTURBANCE 12.9 Acres 48" HDPE x INSTALL 48" x 46' NCDOT HDPE WITH CONCRETE ENDWALLS SEE CULVERT SHEET "mmm FOR ADDITIONAL INFORMATION LIMITS —� OF DISTURBANCE 34.2 Acres LIMITS 6U" HDPE �i0iDIST�UU�ANCE 16 N A 10�0 FT LAKE JULIAN B II I 1FAR 1 \,. � � ,4` �`�� '`, :cam. - • � • :. � r - rr I\ ON rd III WON r1firp.0i FINAL GRADING CARO SEMEN 4Q*�BURNS AND SEMEN NXIMSDONNELL DRAINAGE SEP1 DUKE project I contract 4 - . -. . .. . IN ME . SEMEN •�� •. 1 KANSAS CITY, MO •0� ENERGY. .- 1••,•0 "- ■■■■ 1 1 1 1 sheet 11 no. I date I by I ckd description J. TRONSON • 1 1 1 11 •1 • . IC Y D NONII &OWNI r� 2 3 4 5 6 7 8 ASV C901.013.006 REV. 0 r WATER ENTRY UNIT 324' i\\ PROFILE A 74' �XA/XA/i� 0 2. STORMWATER BASIN CONSTRUCTION DATA BASIN FEATURE WEST STORMWATER BASIN TOP OF BASIN ELEV. 2107 BOTTOM OF BASIN ELEV. 2097 MAXIMUM SEDIMENT LEVEL ELEV. 2099.8 TOP OF PRINCIPAL SPILLWAY RISER ELEV. 2101 PRINCIPAL SPILLWAY RISER INVERT ELEV. 2097 RISER DIAMETER (FT) 3 BARREL DIAMETER (FT) 2 BARREL OUTLET INVERT ELEV. 2094 BARREL LENGTH (FT) 300 MINIMUM OUTLET PIPE SLOPE (%) 1 EMERGENCY SPILLWAY INVERT ELEV. 2105 1-YEAR, 24-HOUR PEAK POOL ELEV. 2101.0 10-YEAR, 24-HOUR PEAK POOL ELEV. 2102.1 MINIMIZE CHANCE OF SKIMMER CLASS B STONE PAD END VIEW SIDE VIEW BECOMING STUCK (4' X 4' X V MIN.) (NO SCALE) FAIRCLOTH SKIMMER DISCHARGE SYSTEM WITH OUTLET STRUCTURE 3 —C VARIES EMERGENCY 7 S_- 36" 0CMP RISER PIPE PILLWAY SEE PRINCIPAL SPILLWAY SECTION � 2, 1 DETAIL (THIS SHEET) Cn EMBANKMENT _ � 6" RIP RAP I � POND BOTTOM PLAN VIEW 24" 0 CMP 4" ORIFICE 0 —D 2 OUTLET PIPE � EAST PERMANENT STORMWATER BASIN NTS PERMANENT BASIN SPILLWAY CONFIGURATION r4 W NTS Z7 � fTl ANTI -VORTEX VANE E NO. 4 REBAR WELDED TO BAND STEEL BAND EMERGENCY SPILLWAY EL. VARIES SEE TABLES FOR SEE TABLES FOR TRASH RACK (SEE - BOTTOM ELEVATION TOP ELEVATION DETAIL THIS SHEET) 36" O CMP RISER PIPE TOP VIEW Tel RISER INVERT EL. VARIES L TRASH RACK TOP GRATE (IRVING ANTI -VORTEX VANE -EXTEND 1/4" STEEL\\ STEEL "X-BAR" GRATING TYPE BB- PLATE ACROSS FULL WIDTH OF TRASH 4" ORIFICE FOR PERMANENT 24" 0 CMP BEARING BAR SIZE 3/4"x1/8", OR RACK AND WELD TO TOP GRATE AND #4 STORMWATER BASIN OUTLET PIPE EQUAL) - BARS AT SIDES 5' TITLE Environment & { ; STORMWATER MANAGEMENT PLAN POND BOTTOM EL. VARIES 1% a - OUTLET ELEV.CN Infrastructure VARIES #4 STEEL REINFORCING BAR 2030FALLING WATERS 19$2 ASH BASIN -BUNCO 089 F N 30" 0 CMP TEE _- ROAD, SUITE 300 ameC F _ f WELDED TO BAND AND TOP KNOXVILLE, TN 37922 foster a a a #6 BAR BOTH DIRECTIONS BOLT BAND TO RISER GRATE TO FORM 4" SQUARE EMERGENCY SPILLWAY FAX: (865)671-6774 STORMWATER BASIN DETAILS LICEGRIDS ALONG SIDES FAX: (8 5) 6 Wheeler 5, 2500 PSI CONCRETE BASE -- ;n CMP RISER NTS NC GEOLOGY: C-247 FOR o ISSUED FOR PERMITTING SIDE VIEW - - -- SEAL SCALE: AS SHOWN DES: APT PRINCIPAL SPILLWAY DETAIL TYP 5 6 DUKE DWG TYPE: DWG DFTR: APT TRASH RACK DETAIL TYP I `\��"'111°°"", ---- —- — NTS -_ NTS \ 'CN -A NTS ;E N E JOB NO: 7810160620 CHKD: DATE: 09-27-2016 ENG •: � 1903 � = FILENAME: ASV_C901.013.006 STORMWATER BASIN DETAILS.dwg APPD: G••, •Fb� DWG SIZE _ DRAWING NO. REVISION Xr�G/NEE,.• . .;.; ;,;`,v P ANSI 22"x34D" ASV C901.013.006 0 REV DATE JOB NO. PROJECT TYPE DES DFTR CHKD ENGR APPD DESCRIPTION INCHES 1 2 3 TENTHS 10 20 30 4 5 6 7 8 9 10 -- -- -- — — ---- l —- — --- )— — ----- — — -- _I_ -- —�---- — - — WITH TRASH SCREEN i �00000000 � ORIFICE OPENING INSIDE THE j HORIZONTAL TUBE WITH A CONSTANT HYDRAULIC HEAD A—' SCHEDULE 40 PVC PIPE (BARREL OR ARM) EARTHEN EMBANKMENT -711 FLEXIBLE HOSE— _ EMERGENCY SPILLWAY FLOAT /\//' F`-•; -- REMOVE FOR PERMANENT BASIN 24" O CMP 36" O CMP RISER PIPE SECTION - TOP VIEW OUTLET PIPE � � ''�._.. Via..__- _ I •>' PVC VENT PIPE 6" RIP RAP TO BE -- PLACED AROUND ' BASE OF RISER' a I 4'Fill 1 B— WEST PERMANENT STORMWATER BASIN N I TS - �� Y PLAN VIEW 4" F R PERMANENT — - `- ORIFICE 0 � -- WATER ENTRY NIT STORMWATER BASIN 1 U --- " MAINTAIN DEPRESSION TO 312' 21� \r�\ \ ��\ PROFILE C 72' 0 SEDIMENT BASIN CONSTRUCTION DATA BASIN FEATURE EAST STORMWATER BASIN TOP OF BASIN ELEV. 2108 BOTTOM OF BASIN ELEV. 2098 MAXIMUM SEDIMENT LEVEL ELEV. 2100.4 TOP OF PRINCIPAL SPILLWAY RISER ELEV. 2104 PRINCIPAL SPILLWAY RISER INVERT ELEV. 2098 RISER DIAMETER (FT) 3 BARREL DIAMETER (FT) 2 BARREL OUTLET INVERT ELEV. 2095 BARREL LENGTH (FT) 300 MINIMUM OUTLET PIPE SLOPE (%) 1 EMERGENCY SPILLWAY INVERT ELEV. 2105 1-YEAR, 24-HOUR PEAK POOL ELEV. 2102.4 10-YEAR, 24-HOUR PEAK POOL ELEV. 2106.0 Plotted By: Bishop, Matt Sheet Set: Stormwater Mqmt Plan 1982 Basin Layout: STORMWATER BASIN DETAILS September 28, 2016 04: 45: 15pm P:\CADD\Projects\7810\7810160620 Ash evil le\Storm water Mgmt Plan 1982 Basin\Plansheets\ASV-_C901.013.006 STORMWATER BASIN DETAILS.dwq 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 --- - -- - -- - -- - -- - -- - -- --- - -- -I- EXIS ING GROUND - -- FINAL GRADES - -- FROM DAM B - -- REACH, AMEC -- DRAWING C 2 150 2,150 2,145 2,145 LEV. 2141.00 ELEV. 21 1.16\1 P OPOSED G E ELEV. 214E ELEV. 21 .30 ELEV. 139.07 2,140 2,140 10 CONC. HEA WALL — — — — — — — — — — — — — — — — — — —1-4 1 -48" HDPE — — — — — — — — — — — — — — — 2,135 F 2134.031 45.7 5 LF E= 2133.8. 2,135 000, oOo,DoO ,Ooc — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — O DQo O o 130 12"CASS BRIP RA 24" CLASS 1 RIP RAP 2 .3� SECTION 1 006 20' 101 0:1 O O O 10:1 37 3:1 10:1 O OQO O 0 O o OOQO 0 0 OQ OO O O O OQ O OQ OQ O OQo O O O O O O U UO01 O UO OQ O oQOQ O OUTLET DETAIL 24" CLASS RIP RAP 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 5 10 15 20 25 30 35 43 45 50 55 60 65 70 75 80 '��115111f17/!r/ cARo�fr,�, BURNS CULVERT SECTION =o 'e�essrQ� �= 0 SEAL r•, NXMSDONNELL DUKE project contract 'a pg1294 - THESE DOCUMENTS WERE PREPARED 9400 WARD PARKWAY ENERGY® I e:. UNDER THE DIRECT SUPERVISION OF ANDREW E. FRIES, PE # 041290. KANSAS CITY, MO 64114 816-333-9400 drawing 9 no. r LICENSE # C-1435 ASV C901.013.007 - 9-28-2016 no. I date I by I ckd I description designed detailed 1. TRONSON I A. REICHERT sheet file Culvert 148in HDPE.d n A B C D E F G H \\bmcd\dfs\Clients\ENR\DukeEnrgyPro\86170_DukeAsheville\Design\Civil\D1,gs\Nerr\Buncombe County Stormrlater Permit\Culvert 1-48in HDPE.dgn jstl-onson 9/28/2016 1 2 3 4 5 6 7 6. 8 10 11 12 13 14 15 16 Q STA.19+17.89 i 2,160 2,160 EXISTING G OUNDi 2,150 F ROPOSED GRADE 2,150 240 JELEV.27 ELEV. 21 .49 ELEV. 2136.2 � ' 2,140 CO C. HEADWALL 2,130 2,130 00. rL=2129. 2,120 2' TYR 69, x 132' DPE — — — 2,120 CONC. H DWALL \,,,_, S=0.75% — — — 60" x 44' HDPE = 2109.64 C NCRETE COL R CLAS 1 RIP RAP 2 I i i SECTION 007 190 180 170 160 150 140 130 120 I10 100 90 80 70 60 50 40 30 20 10 0 10 20 30 40 50 6E 70 80 90 100 110 120 130 `4.14rCARP ✓fi %BURNS CULVERT SECTION tio,C�11tIllrrr+'��r ts Slily`+��_ o - SEAL �' MSDONNELL ' DUKE contract "drawing —_ a a4t29b r _ THESE DOCUMENTS WERE PREPARED UNDER THE DIRECT SUPERVISION OF 9400 WARD PARKWAY ENERGY I KANSAS CITY, MO 64114 drawing no. rev. ANDREW E. FRIES, PE # 041290. 816-333-9400 ASV C901.013.008 0 f Rg4 1 7/22/16 JT JM REVISED FOR PROPOSED GRADING LICENSE # C-1435 — no. I date I by I ckd I description designed detailed J. TRONSON I A. REICHERT sheet 9-28-2016 file Culvert 2-60in HDPE.d n A B C D E F G H \\bmcd\dfs\Clients\ENR\DukeEnrgyPro\86170_DukeAsheville\Design\Civil\D1,gs\Ne1,\Buncombe County Storml,oter Permit\Culvert 2-60in HDPE.dgn jsttonson 9/28/2016