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HomeMy WebLinkAboutSW6240904_Plansheet - Grading/Drainage Plan_20241007 Docusign Envelope ID:4CF1 F6F3-DE58-4BD7-82EE-9DCC82BO9CA7 A CAR �0 0 z W 1723 44 W N SITE ss 1g 09F 16 33. . RFLE< �.� 9/9'2024 U �O O W •0 b GOON ACT W rn Q QUO O,Q 3 VICINITY MAP J �ZN o (NTS) ��� �o� �S2/30N(1 m Q �Td o U � T C O n N 7 O O N O O c a� :F N N O CO 7 7 O ^O O 6 I 1 U c MA09 0 O o o-im O O N "_0 CO *it � a �M N Q) p N Q w v > �� _ U I m m m TEMPORARY SKIMMER BASIN 1 W BAFFLES SHADED AREA m Q0 `° u O (� E 0-^ D.A.=1.4 AC. 0 o 1= to o TOTAL DRAINAGE AREA=5.9 AC. > � 00 N ' a cn 0 Q10=(0.3)(7.21N/HR)(5.9AC.)=12.7CFS Z w } � m r o I J p1 ❑ (D Lu m a (z 101) 9 l 6—9 0 0 Z# d ID w VOL. REQ'D=1,800CF/AC=(1.4AC)=2520CF Q w W O ^ SURFACE AREA REQ'D=325SF/CFS*(12.7CFS)=4128SFLn Q 0 Z l 6 d `0 6 L 8 Q (2:1 SIDE SLOPES - 7 DAY STABILIZATION TIME FRAME TYP.) = Z Z [ V x qj N � a s '.I(' `.I O u l w u 9A9}S �_ SURFACE AREA PROVE ED=4250SF Z � O Q � z Z a I/ N VOL 0 WEIR WIDTHE6=7463CF O 0 cr 0 0 .V O v m SKIMMER ORIFICE DIAMETER=1.0 Q z > Z a Q Z Z Q I-Il 3 Q) o DEWATERING TIME: 3.1 DAYS � Q o J IN/ N O o w Lq NOTE:CLEAN BASIN WHEN 50% FULL DURING CONSTRUCTION. WHEN UPSTREAM AREAS �7 S �n Z o z Q (n -� O � ARE STABLE AGAINST EROSION AND PERMISSION HAS BEEN OBTAINED FROM NCDEQ,INI N (0 IL c 0 Li — REMOVE TEMP. BASIN, INSTALL PERMANENT GRADES, AND SEED ALL DISTURBED AREAS a O I k Q) O N W �� \ \ � N PER SEED SPECS. c\j LE NEW 2" BLOVSO Z Z CO / O ROADSIDE DITCH X X O NI (n SLOPES IN THIS AREA J O } L I O MAY NEED TO BE ASSEMBLY �'_ �� 2 Q) X ROADSIDE SWALE 1 TEMP. SILT _ W O REVISED (STEEPER) IN AC ENCE AS I + O ORDER TO ALLEVIATE DA=Q10o 158CFS SHOWN s �� 1 195 4' \ N O - DISTURBANCE OF 'L + EXISTING TREE R xca S 0 1 ®2 3 5 4 (FIELD DETERM D - x _ �x� 7nr��1C..- .*��v TEMP. CONSTRt1CTI0N 0 ENTRANCE o o 2. 4k: :::: : ::::: :::: ::::::....:::... 0 0 0 o — 245.77 w o — — 0 — — —� CD : :: LO J NEW 12"X2" TAPPING I SK ~ 0 SLEEVE & VsASE r x Q /� V rn L�J L_L_J \ o D p --�) D uLUIILL�G.F11�ldF�LL D D D `� / PERMANENT RIP RAP / I o ROADSIDE DITCHES TO l ROADSIDE LE 2 /- U / (� BE USED AS TEMP. I I tl 1 / NEW 3 4° WATER \ DA=5.4 AC TRANSITION "T" r- DIVERSION BERMS `\ IN ROADSIDE DITCH �_ L_ ZJ -� Q I SERVICE & METER DURING CONSTRUCTION Q10=19.4 WIDE - 10 EACH -Q N O TYP. AS SHOWN I �� X D ) o :3 N l__ \ b D50=6" (.0 '___1DEPTH=18" / O TE SILT (INSTALL FILTER CL F CE BENEATH RIP RAP) LO (D N Q SH N I O \ M I — LLJ _ [ �] ! I > \ LL_ J z N I Q I 5� � o / M 00 x c 2 t) Lu w w M DRAINAGE AREA TO \ iL \ '�2 5 z V �C.4\ � � �� SKIMMER BASIN Oz z 5.9 AC. �^ In LO I—I L'�Ic 3HO� I Q10=21.2CFS <9�� W i� 0' w -3HO ,_ \ v 3H � z = m ❑ 31p 3H 3H \ O ❑I I �3H�3H�3H 3H \ � � I I 3H�3H�� \ J z ❑ a? w INI \ � INI 3H�3H Ud /L LL Lij W V 3H��3H � � � iH 3H�3H J \ O 3H.,� .L 3H � ,� V . 3H O 3H� 3H 3H o H 3H��3H� H� � � �I 3H�3H�3HO_�3H 3 3H..�3H I3H 3 71u e 3H 31­1,L -❑ 00 I I O 3 ..�3H 3H 3H 3H O 3H�� —3HO L' '0 z u� 3H 3H—3H N Q w O 3H in 01 1 z I / N � ~ � H"�3H�3H�3H�3H� � � I I W s= I H 3H 3H 3H0�� LO J — _ L I 1 � c mu I I �Z6'26 3«92�Z� 0 N ao p o - - � (` \ 0 N N �Z 1 O IDrI 00 W LLI O VJ l-V2 9P!IS ` l# od �" z /�W �_ N N uOsug0F 991 P-J[)M C3-)CONSTRUCTION SEQUENCE �J O o a — � � — � � - - - - - - - - - - - - - � � — SOIL TYPE DELINEATION 0-) m � N uosuHor Inpd Hd9sor 1) INSTALL THE TEMPORARY CONSTRUCTION ENTRANCE. �� > > > > > TEMPORARY DIVERSION BERM (TDB 2) INSTALL EROSION CONTROL MEASURES AS SHOWN ON Q) I z CD Q (7 DAY STABILIZATION TIME FRAME PLANS. (f) w w o O —•—•—•—•- -•—•—•— TEMPORARY SILT FENCE (TSF) 3) COMPLETE INSTALLATION OF SITE DRAINAGE NETWORKS T— I a z W (�J cl LIMITS OF DISTURBED AREA AND SITE SWALES WITH ASSOCIATED EROSION CONTROL o TOTAL DISTURBED AREA=1.5 ACRES PROTECTION BEFORE BEGINNING SITE GRADING. I Q O too o 4) STRIP TOPSOIL. r 1 O — — — — — — — — — — _ EXISTING CONTOUR 5) GRADE SITE. `J 10o FINISH GRADE CONTOUR 6) GRASS AREAS THAT WILL NOT BE DISTURBED. I = 7 INSTALL UTILITIES. V SKIMMER BASIN DRAINAGE AREA 7) PLACE BASE-COURSE. LLJ o — — — — — — — —a® TEMP. ROCK CHECK DAM (TRCD) 8) SEED AND MULCH ALL AREAS TO PROVIDE PERMANENT I Z — DC J ROADSIDE DITCH DRAINAGE AREAS GROUNDCOVER WITHIN 7 OR 14 WORKING DAYS FOLLOWING (y Q -o Q COMPLETION OF ANY PHASE OF GRADING, AND WITHIN 90 z n CALENDAR DAYS FOLLOWING COMPLETION OF CONSTRUCTION 00I GRAPHIC SCALE - HIGH I NOTE: ADDITIONAL EROSION CONTROL PLANS OR DEVELOPMENT. e— O Q Li 9 MAINTAIN ALL TEMPORARY MEASURES UNTIL Of Q E so 0 25 so 100 200 &APPROVALS WILL BE REQUIRED FOR PERMANENT GROUND COVER IS ESTABLISHED. � II----�� w r r-1 Ln J INDIVIDUAL LOTS PRIOR TO LOT DISTURBANCE 10) NO SEDIMENT OR EROSION CONTROL MEASURES ARE _j < _0 TO BE REMOVED WITHOUT THE APPROVAL OF AN NCDEQ z J INSPECTOR. ~ ( T>\ FTTT j v 1 inch 50 fl. w zz z >