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HomeMy WebLinkAboutSW8970713_APPROVED PLANS_19980109 (2)STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 g10113 DOC TYPE ❑ CURRENT PERMIT II APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE \, qM 0109 YYYYMMDD GENERAL 1407ES: 1. Information concerning underground utilities was obtained from CONC. POWER available records. It shall be the responsibility of the POLE &SF�Contractor to determine the exact elevations and locations (0tyoa JURISDICTION TAX PARCEL #65-00-04-17 or all existing utilities at all crossings prior to commencing trench excavation. If actual clearances are less F than indicated on Plan, the Contractor shall contact the'' 2 \ '�2 ' EROSION & SEDIMENT CONTROL and WATER QUALITY PLAN ANTIOLIA L OCA TION MAP NOT TO SCALE Design Engineer before proceeding with construction. Gj' / \\\ `S:ae� (A MULTI -FAMILY DEVELOPMEIJT) 2, NO CONSTRUCTION IS TO BEGIN BEFORE LOCATION OF EXISTING TOP 13.65�'/ �� 79\% WILMINGTON TOWNSHIP NEW HANOVER COUN Y NORTH CAROLINA UTIL17/ES HAS BEEN DETERMINED. INV. s.so time ` INV. 4.10i , ♦ � \~\ 3. Contractor is responsible for obtaining all required permits. / 2 , 1 ' ey / 24 / \ F G�FR ♦ CI 1 � TY OF WILMINGTON 4. This plan is for site erosion control, water quality and drainage. See C j nor 2� T tZ \� rqv OWNER: P.O. BO S. SANDERS 4 POWER /� TAX PARCEL P.O. BOX 3167 construction and building plans for details on utilities hookups, et: TOP 13.03 POLE zz C� ' --� ALL ROOF DRAINS MUST BE DIRECTED SO THAT THE RUNOFF IS INV. 1.43 Syy�J, tiRl ` 2 ✓. INV. 1.43 s 9 x N v OT v SEN T TO THE POND. B� `\� ' a CALCULATIONS FOR IMPERVIOUS AREAS AREA IN DRIVEWAYS/SIDEWALK 174,100 S.F. AREAIN ROADS 22,750 S.F. AREA IN BUILDINGS 90.860 S.F. - SIDEWALKS TO BUILDINGS 3,733 S.F. TOTAL IMPERVIOUS AREA 291.443 S.F. 291,443/43,560 = TOTAL ACREAGE IN PROJECT 6.69 AC. 15.186 AC. Y OF IMPERVIOUS SURFACE = 44% 7 OF IMPERVIOUS SURFACE = ON PREVIOUS ANTIQUA PRELIMINARY - 577 V� 0. X x\� X e x o/ , x x x X X X �..� �' x X X X n0 'v S X. - -- ?' ����P�Jy^P�� ?. -So , � �4od uPE DI 19 2 B� PUBLIC ROAD J o` °Pr w A-W CWNSERVAkCIA 7s.1 _ Y 78.6 ---------------�- ',�-� / '�X x AREA' - X�� � EL=20,9 ftd l x, x x x x Au / x� C a\ x -% x_ x -I 9 171. x x x A e.- CONNECT PROPOSED 12" � _ <2 WATERLINE TO EXISTING�� X X X X X X ' 'B ' . P / EL=19.9 X x - 12" WATERLINE 1 ® 92�'yL� `o. / _X X -X X- x X. X X x� a 79 EL=19.1 18.1 - OirG Z. x x X11- y�n� �1 x x x x x n,A X0.4(48,<Acx X �J 6" MINIMUMt� Pi lK AREA ��' THICKNESS pJZ ZONED HM \I/ x :K x N/F FLGSSIE BkYAN Foa XRISI icTlrJN 2" -�" COARSE is X X X� K� k - E •F, L � ' �� TOO YEAR 0 6LOOd LINE ` � . NOTE: SEE NARRATIVE 12'MINIMUM X x FOR MORE DETAIL X ry x x X TEMPORARY GRAVEL CONSTRUCTION � � X Xi � ~' �89 �RFq oAF � s ti O N 86'49'32" E z' x I*F.o u� RF r qp S 17 ....... ENTRANCE/EXIT DETAIL 18.00 FT ' X x N.TS. f X X I q7 3� °L Q x 1� _ 3� � 1 C E 2 X � p° ox X X x $F �•x lox LEGEND q x x x x " x X X x x x x _V\ 174 x JU il�� X S� \ +-----------i EXIST. SANITARY SEWER Z x- x x x ONSER TIT NOV 'x X X X x x -x X- x X X X x �x x- x �l` �'� o ff /� x IIX ` Q` s- -@ -- -� PROPOSED SANITARY SEWER q y-.-_ �°'p .. to AOo�(r. (�• jC =- X=X-Y _. LC _ X -X -X X X X X X X X X X .+` X k X X X X --._ 7^ g0S1. 9'W 4 EXIST. WATER SUPPLY = x x "x- -x-+x_. x. - x x- x x '� /x x x x x x x X w 25' SE IBRK N 83'36'S4rµ,'�1.86 F R `(_= " X x X X_. X X X - ,_ x�� PROPOSED WATERLINE & FIRE HYDRANT ASSEMBLY � j< x x X X�/ cT STOP SIGNS TO BE PLACED AS NEEDED I ZONED R-15 SF La=22' c1 4' SIDEWALK -.�- SURFACE AREA OF POND PROVIDED x� X .y TYPICAL PARKING SPACE &SIDEWALK RjT1 5' O ELEV. f0 = 75.073 SF. �- .. SURFACE AREA REQUIRED 10,620 SF 100 YEAR bt �X FLOOD LINE 'sr DIRECTION OF STORM WATER RUN-OFF ELEV. f0.0'� X -\v- 1' La = 20' ■ CATCH BASIN APRON THICKNESS = 2.0' I!m CURB INLET 2 CLASV-4 A coNCRErE �.. W FIL 7ER FABRIC ' "T s fR ® STORM DRAIN MANHOLE 42 OR 48l.. SEE SIDE DETAIL 2ASPrM11 ,i HANDICAP SPACE 2 I-1/,r\ Y x OVERHEAD ELECTRIC LINES INLET PROTECTION DETAIL '" 25' 4 j' ..: SETBACK 1 " 4X 1 POSSIBLE TREE PRESERVATION AREA o / LXJ o NT3 r C ro CABC BASE 47MIN. 'r ALL SLOPES � NOTE: COLLAR T9 BE POURED AFTER MAY BE REJECT OR SPILL TYPE CUTTER 3: 1 MAXIMUM o PIPES ARE IN PL .E. REINFORCING: CURB AND GUTTER SECTIONS j\ N # 4 BARS ®12 iW 4'-0"TYP. 6'min. 12'min. SEE PLAN o 11 in �- 13..5' v R i 3 STREET TREE 50' ROW OW a Foreboy volume I I 10 Of 4' 6' t t 4 10 lool POND 2D� 1 d = -_ Io 110N-MUNICIPAL NON-MVNICII II G' =3 t� C� [ 0 60 30 0 60 C J r� O--i PLAN VIEW SCALE IN FEET 60 SEX. SSMH �.. 10'- --� T� •�?,' / , -flI I .--4-0"TYP.TWIN 24 "RCP S R ORMWA ATER Oe -- --- D E C E I V E „ f0 10'-3" ---- NOV 121997 D 'x / O v LANDSCAPE PROJ # -D 13 SEE .SHEET 2 of 2 x\ ( FOR TRASH R,iCK AREA O<j ell) // �' �/[v 1.25'WF,'R '';7UI- 4' SIDEWALK 13, QP�o / ' ®EX. SSIM it -1" N 8.5 TOP 14.23 1 ENTRhrvCE TO PLAN VIEW - / INV. 7.98 ECHO GREENS- / x / z7yny TOWNHOUSES CENTERLINE OUTLET STR(Ke JUKE DETAILS Y NO(10 SCALE TYPICAL DRIVEWAY AND PARKING / P IVTS Alt,APPROVED POST TO BE 6 FT. APART MAX FOR NON-RE1NF0ACED FABRIC. NORTH CAROLINAMANAGEMENT ENVIRONMENTAL ' �• / ' �} ' . FOR METAL MESH RISE 8' SPACING. DIVISION OF WATER QUALITY 7 Stormweter Permit No \ EX. SSMH COMPACTED FILL OR TOP 10.20 GRAVEL, EXTENSION q / INV. 6.67 OF FABRIC AND WIRE INTO THE TRENCH \ \ , / SEE NARRATIVE N FOR MORE DETAIL. a o require p , --WSEL storage, typical e °� EASEMENr +/a: cAMiNr 3 9 YP w a Lm I t a': Ee I ___________________� ___ U> - - 4"GONG ISOMETRIC VIEW COONC CLAY D 0 n ri, SIDEWAL pP I . P SIDEWALK OUTLET PIPE TYPE A - 2'ASPHALT SDEWA /OA 4'min. CURBI-_ � 4"MARL BASE L1.5'MIN NOIE: Both sides are symmetrical. 1. No drive access for single farnly development. as necessary OUiLEI 2. No direct access to multi family development. mum I' Stone PROTECTION 3 Centerline striped. 5. AS ON PLANS 4. For catch basin lay -out see "Local A & 8 Cul-de-sac" details. FOREBAY SECT70N DETAIL ANTI -SEEP COLLAR TYPICAL STREET SECTION TYPICAL AT ALL STORM OUTFALLS TO POND NIB NOT TO SCALE NOT TO SCALE r -� �` f65-00-04-15 WILMINGTON, N.C. 28406 \ \ \\ ZONED R-15 OATS: JULY 24, 1996 C/L 4OR apE Xs�e fT /' }Po°) 4'TURNDOWN SIDEWALK 8" I Id' 4 4' 1 -6 1 6 4' SIDEWALK TAX PARCEL 3: t y" 2" 1-2 " FT -�\`x .°'Sew• f i /165-00-04-13 ---- 4 O 4• ABC p 8'SANriARY B"WAIER J I SEWER TYP ( ) 3 I PAVEMENT y I � ) MAIN TYV a P6• WIDTH IS 26' FACE TO FACE. \ m `x� X�� 25`' fY"PICAL Pp.RKiNt;_SECTION 5D' IOW - - t SETBACK . \ NT8 X\ X 27 < ar 1 X X \ - EL=22:9 PRE SWAT\ CUL-DE-SAC �C 1 X X x X`11Vc A - ZONED R-5 NT8 EL =19.9 X X x?, ' X `'<�►� ` ? 7 - / r \ a A N/F LAZOR `X x x x x 1► ° X22X �\ £ \� D.B. 14E7 PG. 1566 x x x X X ?O Cb /X x x �`�x mp ' F OREBAY VOLUME: Volume Required = 30,699 X 20% = 6,140 cf x x xoz 70- 5 x x ' / P� Volume provided = 7,623 cf x x x ,9 - � EL=22.9. x�,. x ; x - �� --_ � =�, POWER LE STATE WATER QUALITY POND CONSIDERATIONS - li ., x x % - � /C x"<P0§E .-,% OVERHA D CCni,C _ _ r _ --� `�� Surface Area required = 1 0, 620 sf / _ / i• p-.3-"��'.-. Surface Area provided = 15,073 sf L 7, Storage Volume required = 26,580 cf EL-19.9 Storage Volume provided = 30,699 cf Stor age Volume Drowdown Time = 3.9 days ®� e' N`k�J/�� -< ®Ex ssM 1"- -- '\�� `` PEAK UISCHARGE SUMMARY ' }pF ,d c./' / / ' TOP 20 44 ,, \� 0< 10) pre-deve loped = 15. 1 cFs- EL-18.9 �� /R �� y INV. 13.69 �. V 0(50) pre-deve(oped = 28.1 cfs \20 / !d , / T�17O 0(100) pre -developed = 35.3 cfs y ,�,/. - ,0<10) post-devetcped 3.7 cfs @ WSEL = 13.8 +/,,� �j / Q<50) post -developed = 32.8 cfs R WSEL = 14.7 Q(I00)post-developed = 49.6 cfs @ WSEL = 14.9 i i �� y' � PUI4i) SLUIMEWTATIUW CONSIDERATIONS - o FOUk STANDARD Storage Volume required = 10.73 X 1800 = 19,314 cf • /, / �// �� 2'X3' GRATES ° f'✓ //' P'/ ' ®'EX. SSMH NCDOT OR EQUAL Storage Volume provided = 30,699 cf TOP 19.07 LIMITS OF DISTURBANCE = 10.73 acres INV. 12.45 - - ---- / x; � / ory rrrrr� t1t� 1 REVISED TO SHOW SIDEWALKS STREET SECTION DETAILS AND 8-7-°7 DIMENSIONS OF STREETS AND SIDEWALKS. - - - REV. N0. DoIE( REVISIONS - EROSION & SEDIMENT CONTROL and WATER QUALITY PLAN ANTIQ UA WILMINGTON TOWNSHIP NEW HANOVER COUNTY NORTH CAROLINA `�Tawr°npr S CARo'''%,, . C� SEALM�l'9 2000 7 00 OWNER: NATHAN S. SANDERS P.O. BOX 3167 PHONE (901) 791-1196 FAX 910-452-0261 HANOVEH DESIGN SERVICES, P.A. LAND SU WYWS, EN6YNEt7?S & LAND PLANNERS 319 WALNUT N.C. 2 " WILMINGTON,ONE:(91 ) 3 28402 PHONE: (919) 343-8002 Date: 3-12-97 scale: AS SHOWN Drown: Jam Checked: DSH Protect No: 'O'ec'4893EC JM97 Sheet No: 1 Of: 2 GENERAL NOTES: / t. in ormotion concerning underground utilities was obtained from CONC. available records. It shall be the responsibility of the '/ POLER COntroctor to determine the exact elevations and locations V y4 1 / �,,�` 404 JURISDICTON TAX PARCEL of olI existing utilities at all crossings prior to �r\� �,PP{% \' I y65-00-04-17 f h ' if t l l n l yP' ass It; EROSION & SEDIMENT CONTROL and WATER QUALITY PLAN C commencin rent excavio o n. ac uo eara ces are ess yam./ �3, than indicated on Plan, the Contractor shall contact the Design Engineer before proceeding with construction. Gj" z 1B �S�oeAr 1p MULTI -FAMILY DEVELOF'MLN I ) 2. NO CONSTRUCTION IS TO BEGIN BEFORE LOCA77ON OF EXIS7/NG � ' TOP13.65 ,;,��', �;; 9. �'�`. - 9- WILMINGTON TOWNSHIP NEW HANOVER COUIJTY PJOR-iH CAROLIIJA UTILITIES HAS BEEN DETERMINED. INV. 5.so / ti , INV. 4.10, , or, 3. Contractor is responsible for obtaining all required permits. ySwP 0.5 e \ OWNER: NATHAN S. SANDERS 4. This plan is for site erosion control, water quality and drainage. See G+ ' O�wER '' // >' 7 1 \\"fq ° TAX PARCEL P.O. BOX 3167 / / /construction and building plans for details on utilities hookups, etc. TOP 13.03 �POLE�� ' 22 9 �� o \ #65-00-04-15 WILMINGTON, N.C. 28406 INV\ DATE: JULY 24, 1996 . 3.13 1 1y ' ZONED R-15 5. ALL ROOF DRAINS MUST BE DIRECTED SO THAT THE RUNOFF IS INV. 1.43 C s I t ' A 2 \t SENT TO THE POND. ' ^ B� 4 \ \ L �/G � ... .. _ // 1 far✓ t \ \ \ f � � 6\J '. , b 4' SIDEWALK 66'-- LOCH 71ON MAP NOT TO SCALE 4' SIDEWALK - 2- 1-2 TAX PARCEL #65-00-04-13 0 a" ABC 0 \N 0 F p 1b Aj' ? ` `\ S s i 8"SANITARY 8"WATER 4r .\ O %Z i SEWER (TYP) MAIN (TYP) 22.2 tiQP ,yams 18 =�s \,s 2 ? TYPICAL PARKING SEC 2TION 0 SETBA INTO SETBACK-, s94 �404 JURISDICTION+ 19 2 e 1 I 1 O T F=22. 9 PRE VATSIBILE pI\ J� --- PUBLIC ROAD--_---� `�\yP ��` '�D�rk� L CONSERVATION 191 A _ EA \ mC �� Fes? , ��,4 ► AREA FF=20. 186 FF=19.9 \ ZONED R-s 2z9\ N/F LAZOR D.B. 1467 PG. 156: o�CONNECT PROPOSED 12' ='^� 11 -- - CB 3 5 n1 FZ WATERLINE TO EXISTING 2 ' ' ' l,1y9 G1� co"ATERLINE L ,.P F=19.9 N.. i 0/ 2L 9� . I ' s 3 to 1 1 FF=22.9'. \ POWER /9 � /. POWE _.� ' l hr. SAC. ELECTRIC ' f �\ FF=19.1 P 19 FF=19.9 6" MINIMUM PARK AREA THICKNESS PGZ ZONED :d N/F FLOSSIE 9t N, N 404 JURISDICTION 2"-3" COARSE AGGREGATE 100 YEAR 1 A°j^^' FLOOD LINE 2 2 ELEV. 10.0 19 NOTE: SEE NARRATIVE 12'MINIMUM SF=18. FOR MORE DETAIL. w 'Oq �o kgReq�. TEMPORARY GRAVEL CONSTRUCTION o ZD. o N 86'49 32" E L> THICK ENTRANCE/EXIT DETAIL 18.00 FT��=�2 R/PRAP �S CHn N.T.S. 0 4 @OP i to o N SF LEGEND v 404 JURISDIC�TON JF --------1 EXIST. SANITARY SEWER z CONSERVATION AREA ® PROPOSED SANITARY SEWER o°� -- --. EXIST. 8"W -i EXIST. WATER SUPPLY 4'. EXIST. ��--�' SETBACK N'8336'Sa°"�-IS BUFFER 25 W 6"W , PROPOSED WATERLINE &FIRE HYDRANT ASSEMBLY ,. s1 STOP SIGNS TO BE PLACED AS NEEDED ZONED R-15 4' SIDEWALK La=22 L]� TYPICAL PARKING SPACE & SIDEWALK 10.5 DIRECTION OF STORM WATER RUN-OFF 26' La = 20' ■ CATCH BASIN APRON THICKNESS = 2.0' r� CURB INLET ® STORM DRAIN MANHOLE 42„OR 48' W,/ FIL 7ER FABRIC _V HANDICAP SPACE SEE SIDE DETAIL OVERHEAD ELECTRIC LINES C INLET PROTECTION DETAIL O a NITS ALL SLOPES o 0 3:1 MAXIMUM c NOTE: COLLAR TO BE POURED AFTER 3 PIPES ARE III PLACE. REINFORCING: n # 4 BARS R 12" EW 4'-0"TYP. 10'min. 6'min. 10'min. rn 0 POND WSEL 35.00 O ® O v 3> u -________ V----------------------- 2'min. OP w stli �� 2'min. O o OUTLET PIPE � A P o. . , O e� OUTLET MIN• NO y�nQ PROTECTION �1 FOREBAY SECTION DETAIL AS ON PLANS TYPICAL AT ALL STORM OUTFALLS TO POND ANTI -SEEP COLLAR NOT TO SCALE NOT TO 8CAL.E EX. SSMH 1A, \ TOP 20.44\ 7FF=18.9 e \ L (cam '' �/ INV. 13.6900 P FOUR STANDARD GRATES EX. SSMH NC OTOR EQUAL TOP 19.07 INV. 12.45 60 30 0 60 C�iATE �� PLAN VIEW SCALE 1N FEET `` 60 TOP 17.38 V)V i _la.a 40/ , ® INV. 10.48 =11.0 i a, i / / i -� f -4.-0"TYP. N1 WIN 24 w w`\�-RCP n s Ali jR�k LANDSCAPE SEE DETAIL 7H6 SHEET FOR TRASH f'A;K AREA `• R / G 4' SIDEWALK C100 YEAR 5 ♦ �� J 13' FLOOD LINE \ `�. 76'2 i /Qr"•ryP� / / 0EX. SSM •-- 1T'1" N 8. ELfV 10.0' �� ; , TOP 14.23 ENTRANCE TO ro - FLAN VIEW n *� . \�?/O / / INV. 7.98 ECHO GREENS TOWNHOUSES CENTERLINE A OUTLET STRUCTURE DETAILS X ,1 ; /1 / , ,� NO) TO SCALE TYPICAL DRIVEWAY AND PARKING NTS P 25' SETBACK �� •,�y�1��, }gam ..._ ._- t � :, � � � � / r / r 0' EX. SSMH COMPACTED FILL OR , TOP 10.20 GRAVEL, EXTENSION \ INV. 6.67 OF FABRIC AND WIRE nUT'I L -. 11T1U1Y SEMENT 1 4 1/4": EASEMENT I I ONC. 2"SAND EWALK 72AASSPH_ALT7 CLAT4 caNc TYPE "A' SIDEWALK CURB 4"MARL BASE TE: Both sides are symmetrical. 1. No drive access for single family development. 2. No direct access to multi family development. 3. Centerline striped. 4. For catch basin lay -out see "Local A & B Cul-de-sac" details. TYPICAL STREET SECTION HIM Y / j 1 2 / INTO THE TRENCH SEE NARRATIVE FOR MORE DETAIL. ISOMETRIC VIEW EROSION & SEDIMENT CONTROL and WATER QUALITY PLAN ANTIQ UA WILMINGTON TOWNSHIP NEW HANOVER COUNTY NORTH CAROLINA SEAL. 20007 lyGMgg! s. W' OWNER: NA THAN S. SANDERS P.O. BOX 3167 PHONE (901) 791-1196 FAX 910-452-0261 HANOVER DESIGN SERVICES, P.A. LAND SURK "S, ENG IaRS & LAND PLANNERS 319 WALNUI SIREET WILMINGTON, N.C. 28401 PHONE: (919) 343-8002 Date: 3-12-97 Scde: AS SHOWN Drown: JBM Checked: DSH Project No: 4893ESC JM97 sheet No: 1 L of: CONSTRUCTION SCHEDULE - Indicated on Plan 1. Obtain approval of Plan and any necessary permits, and hold a pre -construction conference prior to commencing any work. 2. Flag work limits and stake -out roadway, primary ditches, and Sediment Basin for preliminary grading. 3. Install Gravel Construction Entrances. 4. Install Sediment Basin as shown on Plan prior to clearing and grubbing site. 5. Construct ditches and any other sediment control Practices shown, prior to rough grading roadways and site, stockpiling material and topsoil as necessary. 6. Install utilities in roadway, establish final road grades and stabilize road and parking areas with stone base course. 7. Final grade building sites, install non -municipal utilities as needed, and vegetatively stabilize areas where building construction is not imminent. 8. All erosion and sediment control Practices are to be inspected weekly and after any rainfall, and repaired as necessary. 9. Upon completion of building construction, the roadway and parking areas are to be paved and all areas permanently vegetatively stabilized. After site stabilization, temporary measures are to be removed and the Sediment Basin cleaned to its original design contours, if necessary, and riser structures orifaces opened, so as to function as a stormwater management / water quality retention pond. NOTES: 1. This property is located within a special flood hazard area according to Flood Insurance Rate Map Community Panel #370171-0010 B, effective date APRIL 2, 1986. 2. Site area = 15.186 acres. Overall area draining to pond = 11.00 acres. 3. Building layout and dimensions by others. 4. Minimum distance between buildings is 20'. 5. Rip -rap or other suitable protection to be placed at all pipe inlets and outlets, and where necessary to prevent scour. 6. All sanitary sewer and water mains to be 8"PVC unless noted. 7. Two gate valves at all Tees, blow -offs at at dead ends. 8. All impervious areas to be directed to ponds. 9. All roof downspouts to be directed to paved roadways. MAINTENANCE PLAN - Indicated on Plan 1. All measures to be inspected weekly and after any rainfall event and needed repairs made immediately. 2. Sediment Basin to be cleaned out when the level of sediment reaches 2' below oriface opening. Riser structure to be cleaned if excess water above design surface no longer drains properly. 3. Sediment to be removed from ditches when they are approximately 50% filled or sediment level is within 2' of top of ditch bank. 4. Sediment to be removed from behind the any Silt Fence and inlet protection devices when it becomes 0.5' deep. Fencing and inlet protection to be repaired as needed to maintain a barrier. 5. All seeded areas shall be fertilized, mulched, and re -seeded as necessary, according to specifications provided, to maintain a suitable vegetative cover - VEGETATIVE PLAN - 1. Permanent vegetation to be established in accordance with "North Carolina Erosion and Sediment Control Planning and Design Manual", Section 6.11, latest version. POND PEAK; DISCHARGE SUMMARY COCA TION MAP Q(10) post -developed = 13.7 cfs @ WSEL = 13.8 EROSION ZSc SEDIMENT CONTROL and WATER QUALITY PLAN NOT TO SCALE 0(50) post -developed = 32.8 cfs @ WSEL = 14.7 0(100)post-developed = 48.6 cfs @ WSEL = 14.9 AN OUA v GRATE TOP 5.0' WELDED BAR TRASH RACK BOLTED IN PLACE EL=14.25 90°ELBOW DOWN 8 "BELOW WSEL 13 4 4' 11.5 MIN. 1.25' WEIR STATE STORAGE WSEL= 10.0 30,699 cf )0.0 SB 2" PERFORATED PVC W/ GRAVEL POND BOI TOM AND FABRIC FILTER EL= 5.25 ELEV= 2.5 POND MAY BE 0VEREACAVATED TO PROVIDE SEDIMENT STORAGE GRATE TOP EL= 11.5 INV= 10.0 I' CONC. b INV=10.0 or GROUT 2.5'SUMP 3 2 - 24 "RCP 00.31 % OUTLET PIPES Lam' =BASE 4'x 10Precost Conc.Box, lTiindall UV0410 OR EQUIVALENT SECTION VIEW OUTLET STRUCTURE DETAILS NOT TO SCALE FILTER 6'-0" 0'-2" FABRIC TYPE A 0'-2"" BACKr.LL FLASHING LIGHT 6" 5 0-4 / MINIMUM 8" / 0 -8" THICK LAYER OF GRAVEL 1'-0" 7 - WIRE 5-0" ORANGE REFLECTIORIZED(TYP) 2 WHITE REFLECTORIZED(TYP) 2 V-TRENCH m 1'-0" 0'-4" I GROUND SURFACE GROUND SURFACE TYPE BARRICADE NTS >3D15-M H 0 Ld OP o F_ K 6" SLOPE co of EMBANKMENT FES NOTE: FILTER FABRIC IS TO BE PLACED UNDER ALL STONE OUTLET PROTECTION. USE NICOLON MIRAFI 60OX POLYPROPYLENE, OR EQUIVALENT n 14"MINIMUM SECTION EXTENSION OF FABRIC AND HARE INTO THE TRENCH a (A MULTI -FAMILY DEVELOPMENT) WILMINGTON TOWNSHIP NEW HANOVER COUN ►Y NORTH CAROLINA OWNER: NATHAN S. SANDERS P.O. BOX 3167 WILMINGTON, N.C. 2840b DATE: JULY 24, 1996 2'X 4' FRAME AROUND CREST OF OVERFLOW STAKED 2'X 4' 1.5 MAXIMUM HEIGHT WOODEN FRAME 3' LENGTH SEE NARRATIVE rOR MINIMUM MORE DETAIL AND 3' SPACING ALTERNATE METHODS. GATHER EXCESS -- FILTER FABRIC I I I `{ AT CORNERS I I I I I I I I LO EXTENSION OF FABRIC 1' MIN. Z INTO TRENCH 4'CRUSHED STONE OR 12'COMPACTED SOIL I I t I I I I I I I I I I �\� I I �� I � I 1 O 1 � I FILTER FABRIC: PERVIOUS SHEET OF I r_1-i NYLON, POLYESTER. OR I j I DROP INLET ETHYLENE YARN. EXTRA I I I WITH GRATE I I I STRENGTH ( 50 PSI MIN.) l I I l I I WITH ULTRAVIOLET RAY INHIBITORS AND STABILIZERS ISOMETRIC VIEW "--' FABRIC DROP INLET PROTECTION NM PPACTIM GA IP SEDIMENT FENCE ( SILT FENCE NTS PRACTICE 6.62 SF FI FI C FI 4"MINIMUM SECTION d50 = 9" STONE dMAX = 1' 4'AlI12' La = TO - APRON THICKNESS = i' 24" 9 CY ROCK W/ FILTER FABRIC; TWIN-24" CMP SEE SIDE DETAIL POND OUTLET PROTECTION DE FAIL NTS 18' 10' 15' 10' 22.5' OP to MAXIMUM w 3 3 EMBANKMENT TOP= 15.7 (SETTLED), = 16.1 (CONSTRUCTED) 1 a 1 100-YEAR WSEL= 14.9 tMERGENCY SPILLWAY EL = 14.75 TOP= 14.25 STATE STORAGE VOLUME= fl �� 10-YEAR WSEL= 13.8 / 30,699 CF OP ANTI -SEEP COLLAR, OUTLET PROTECTION DETAIL SEE DETAIL NT8 SIDEVIEW NOTE: SEE CONS FRUCTION DRAWINGS FOR DETAILED GRADING. STATE STORAGE ELEVATION = 11.5, WEIR CUT = 11.5 \ 10:1 VEGETATED SHELF, MINIMUM 10' WIDE TWIN 58 LF 24"RCP 0 NORMAL WSEL= 10.0 INVERT OUT= 10.0 Q G ANTI -SEEP COLLAR, EL= 6.5 IE-10.0 15' 47.5' EMBANKMEN��Tpp SECTION 1��`1� BOTTOM SWM STRUCTURE EL= 5.25 1 REVISED TO SHOW STATE STORAGE. 8-7--97 REV. NO. DATE REVISIONS PLANNED EROSION AND SEDIMENT CONTROL PRACTICES - CE 1. TEMPORARY GRAVEL CONSTRUCTION ENTRANCE Practice 6.06 Shall be installed at any entrance to the proposed project from an existing roadway. Drainage should be away from the road and sedimentation will be controlled with downstream practices. During wet weather it may be necessary to wash truck tires at this location. 2. LAND GRHUING Practice 6.02 Grading should be limited to areas as shown on the Plans. Cut arid fill slopes shall be 3:1 or flatter except where specifically indicated. Care shall be taken during land grading activities not to durnage existing trees that are identiried as "to be preserved". SF 3. SEDIMENT FENCE Practice 6.62 Sediment fencing should be installed as shown on the Plan, to delineate and protect wetlands areas, and around any temporary stockpile areas as necessary to prevent any graded interior areas from eroding onto adjacent lands or roadway, or into inlets. IP 4. INLET PROTECTION ( TYPICAL AT ALL INLETS ) Practice 6.52 Storm sewer inlet barriers of silt fencing and gravel inlet protection are to be constructed to help prevent sediment from entering the existing storm sewer system. �P 5. OUTLET STABILIZATION Practice 6.41 Ript up aprons will be located at the downstream end of all discharge pipes to prevent scour. 6. CONSTRUCTION ROAD STABILIZATION Practice 6.80 Upon reaching final glude and after utilities have been installed, roadway and parkiny areas are to be stabilized by placing sub --base course of approved stone, as shown in the typical street cross-section detail on the Plan, to reduce erosion and dust during the remainder of building construction. SB 7. SEDIMENT BASIN Practice 6.61 the Sediment Basin is to be constructed first (see Construction Schedule) and is the ptimary Practice to prevent sediment from leaving the site. Detailed design and spillway configurations are specified in the CALCULATIONS section of the narrative. The PVC outiet is to be blocked during sedimentation function (or not installed) until entire watershed is permanently stabilized and pond is converted to permanent stormwater management detention / retention function. EROSION & SEDIMENT CONTROL and WATER QUALITY PLAN ANTIQ UA WILMINGTON TOWNSHIP NEW HANOVER COUNTY NORTH CAROLINA OWNER: NATHAN S. SANDERS P.O. BOX 3167 PHONE (901) 791-1196 FAX 910-452-0261 HANOVER L)ESIGN SERVICES, P.A. LAND SURII k LAND PLANNEFS 319 WALNUT STREET N T(NC. 2S401 PHONE: ONE:(91919) 343-8002 Date: 3-12-97 %oo1e: AS SHOWN Dm+n: ✓BM Check.d DSH Pm)ect No: 4893ESCI JM97 Sheet No: 2 �2 r Q�� co IMPERVIOUS CALCULATIONS: BUILDINGS: 103,397 SF ASPHALT: 131,680 SF CONCRETE: 46,570 SF CURB: 8,469 SF TOTAL IMPERVIOUS AREA: 290,116 SF LEGEND — EXISTING SWALE — — — PROPERTY LINE CENTERLINE CONTOUR LINE ASPHALT IMPERVIOUS CONCRETE IMPERVIOUS E&� BUILDING IMPERVIOUS IMPERVIOUS AREA FOR ANTIQUA WILMINGTON TOWNSHIP NEW HANOVER COUNTY NORTH CAROLINA DECEMBER 9, 2008 50 0 50 100 150 Scate: I' = 50' SHERWIN D. CRIBB N.C. PROFESSIONAL LAND SURVEYOR L-1099 1144 SHIPYARD BLVD. WILMINGTON,NC 28412 910-791-0080 C:\Users\Malpass3\AppData\Local\Temp\ANTIQUA-120908.dwg