SW5240601_Plansheet - Proposed Drainage Area_20241024

U � IMI \ \ \ \\ 1C / \ - PRE-DEVELOPMENT STORMWATER QUANTITY CONTROL ` •
CZ
N _
/ \
L
\ \ I \ \ \ / _ \ ' DRAINAGE
'7-ADMINISTRATION/DORMS"
2STORY--,-.. - - - - _
AREA
\ , _ 1 ` \ \\ \\ ' / /I III _ I I CURVE Q1 Q10 Q100
w 1 \ \ \ I \GRAVEL \ \ \� \ _ \ I 1 I \ I I - / / / III I PRE-DEVELOPMENT NUMBER
I (Acres)
x= \ \ GRAVEL \ +III \ \
w N \ - \ 1 \I \I \ \ \ � \ \\ r \\ \ ASPI�XILTPARKING \ � � I I � IF
\ �\ /
_ _ \ \ \ \ \ \ \ \ , - \ �, I \ { �. \ I I III J \ I ANALYSIS POINT A 9.83 74 5.01 16.06 30.57
W w _ _ I II _ I _I -� � DRAINAGE AREA B . I
CID
a _ - I \ / I 1 1 \ \ I \ \ III \ \ _ \ I J D/s n �` \ - \ \ \ / / X I �I \ ANALYSIS POINT B 3.38 74 2.05 6.52 12.41
ZZQ , _ / , \ \�3 0\ -PIP
\ _ ; IMPERVIOUS. 0.99 AC UGP _ I I III •
° '� \ \ ' 1 \, \ I \\ c' TIME O F 41 �� \ \ 1 I- I I I NOTE: POST-DEVELOPMENT FLOW IS LESS THAN PRE-DEVELOPMENT FLOW AT ALL ANALYSIS POINTS.
=a \ \ \\ _ I _ _ _ / \I\I \ \ \ \/ \\ \ \ \ \ �' \ PERVIOUS: 1 .57-AC _ _ I_ \ \v / �UGp I cN I I III REFER TO CALCULATION BOOKLET FOR ADDITIONAL INFORMATION.
z w \ _ / I \ ' \ , I m ` \ t ` h I- - , CONCENTRATION '4� _ = TOTAL: 2. -A - N I NI I I I 1937
W o I I �� =33> _ _ _ -° �✓ '� - _ ' ' ] ii - - - - POST-DEVELOPMENT STORMWATER QUANTITY CONTROL
LINE AREA B l/7/Tl/lI7 / j -- I s/GN�'G) \ I p I III
-�- --\ ' � � � /77/Tl/. � / I 52.47' - - - - � \ / MI I I I DRAINAGE •
oHT , -off _- -��ITL - -r R=15.91 _ - - AREA
_ _ \ -� t _ ) x I I I I CURVE Q1 Q10 Q100
_ \ ` - I 1 \ \ \ \ \ \ STATE OF NORTH M \ I --- ` / Q L=28.04'��S 6°53' )- _e \ I �I I /I I ANALYSIS POINT A (Acres) NUMBER
1� � I ,
E - P _==_- __/_-_ \ \ � 1�� /�/� � ;STD 06 . . . . L f III / North Carolina
\ \ \ \ \ \ CAROLINA <p, ° h I / I POST-DEVELOPMENT
=� _ _ 1 l (�\ \\ \ \ \ \`i I 1 / \ I \ , "m-SHP / �/ / `■ ■ ■ ■ ■ ■ ■ ■ L L / / U / X I A(SCM)
� 12.05 83 1.70 21.75 41.20
/ - - - �\ 1 \ I DB 00 PG. 00 133.96 6 0 3 W L ■ I I I II
, GVMiMEOICA/• 8°16'34"W LLLW_L=�_LLLI,
L LLLLLLLLL ISTORVBRICK /REID 0 938565 \ /I _ Q LLL LLL L LLLL7LLLLLUCATV 1 / / LLLL LLL L LLLL L �� 1 UCATV _ , State Bureau of
�/ 33 LLLLL LLLL L L L LLLLL LL CATV- I I�
� RE/D 0175582 ffCjf��
��AAC / ' - LL ` / ' IIII I� POST-DEVELOPMENT STORMWATER QUANTITY CONTROLInvesti ations
AC - W-REID 0180976 \ \ , m UGC -Z f GRASS �F 343 ® Gov E ` Ix x x I DRAINAGE
- - _ _ _ - - - _ _ _ o (%/ ° RECREATION II \ / 2 .32 I Q1 Q10 Q100
PIN 1702812547 _ - _ _ _ ' I - _ / \ , _ AREA
AREA - I X / ° ,-• ANALYSIS CURVE
_� \ 168.3 _2�, R=45.31' W I� I (Acres) NUMBER
- - \ - -UGP/ _ // - I __ I �P :-_® = Cfl o n ---°�� -\ \ \ 404 E TRYON RD � \ - -` � - _ � `�F S87 16 V1�� ■ ■ � L-55.67' • _
3522 GARNER RDi '-- ________ i I �c`�' 26.10' = III I- POST-DEVELOPMENT
III I B (EXISTING STORM 2.56 75 1.58 4.85 9.10
3320 GARNER RD =___ �_- \ ' \ , , - 'TANK �Y ' o IM -®• I I i--t= ■ ■ " ____- )
4z®S86 08'40 W NETWORK
\ \ \ _ \ \ I \ \ \ _ V - - '__ �- - _/ __=_ _- L -- = i s ■ I I I , -� - _ - ■ \ NOTE: POST-DEVELOPMENT FLOW IS LESS THAN PRE-DEVELOPMENT FLOW FOR THE 1-YEAR,24-HOUR
\\ \ \ \ \ \ \ \ _ _ I \ _I - - - _ �- /� s S / '■ I _P� I+ `� 4 °o I ® / I , I "� I I ■ o I� STORM AT ALL ANALYSIS POINTS.REFER TO CALCULATION BOOKLET FOR ADDITIONAL INFORMATION.
/13"
® / \ 3" I I I \ 11,
�. / 1 STORY 'I ® • Ch I --- ° r
J I / I \ I L �o i _Y u p � �_S - G BRICK �� C'� I I �� ■ I
11 GRAVEL II 6" _ _ I I I! I 345 -~ - - \ 1 r
' Ix
---------- --- J______�_ - I 421 N HARRINGTON STREET SUITE 700
I --- ---�----
----� --- -----%-- -�_ �- ANALYSIS POINT 6 / M i i I `� U = ....� UGT- UGT ° -„ GT_ \ 1 II I STORMWATER QUALITY CALCULATIONS RALEIGH, NORTH CAROLINA 27603
8,. qN / / / /' / ' I ` glll / _ II_s�!- - I I UGP- ®� - �-U( 1�86 57 55 E� ■
-�, �- 8' SA N i- I /o'.A s M I I I, ® z - - - UG f - -W ■ ■ �•
° I I _ / - m _ 18.05' • ■ I TEL. [phone] FAX. [phone]
/ AN E-\8' SAN \ - T sHBp 1 li co' c� I \ __
�,�� '�/ I - \ "' I N87°32'31"E \ I EXISTING PRE-1997 IMPERVIOUS SURFACE AREA BUILT BEFORE 1997 = WWW.LS3P.COM
/ / . - F I UGT \■�,� . � ■ ■ . . � . . � '� ,- I o 4.06AC
-� r� / / I I I _�' r 15t3.17' \ m N R=56.18 4 �„E I 0000
�
_ _� < / I® ® x X x z L=60.39' "" ■ '' ___= I EXISTING IMPERVIOUS SURFACE AREA BUILT BEFORE 1997 TO BE DEMOLISHED = • 0
' -IIII - ' - - _ - - - _ f \ 1 3STUKY / / xl 2221 I� 3.16 AC
SHED / / �/ / 71- - - / /' - _ _ - ' \ / I BRICK / - ■ l,_ - _ .' -
/ / / / ® ® ■zo EXISTING IMPERVIOUS SURFACE AREA BUILT BEFORE 1997 TO REMAIN =
- CP 7t � / \ TIMMONS GROUP
\ J \ N /�
\\ / C M N I I i III II :RING I C dGN I TECHNOLOGY
- 1� / / / C I I 4.06 -3.16 = 0.90AC
NC LICENSE NUMBER C-1652
/ � , �� z■ I I II EXISTING IMPERVIOUS SURFACE AREA BUILT AFTER 1997 =
-316- - - - - ' ' " - / / ''// '// �� - - - _ - - - = a �� w / / / ' ' / / / / ® ® ®� I 10 SETBACK I II II Timmons Group
'� I / / 1 / ■ 1 i I I 0.53 AC Attn: Frank Slinsky, PE
ww�\\_ I DYSH / R=50.00 I I II 1 II EXISTING IMPERVIOUS SURFACE AREA BUILT AFTER 1997 TO BE DEMOLISHED = 5410 Trinity Road; Suite 102
_ 5 s / SBI HEADQUARTERS ADDITION '
// ti \ _ _ _ _ _ _ _ _ _ / / I \ �C / M I II 0.49 AC Raleigh, NC 27607
31819 - ,i � _ - 1 � ' - - _ i / - � �- - - � / / // 1 46 L=43.26' 1 I I Y
- - -320- � _ / / /�. 13`>; / - / � ,.. 11 -�L _ UPPER FLOOR FFE: 346.92 / I
_ -321- / c �,3 7/ ,'S- -� - TjGp-��_- l l • I I I\ Iu I EXISTING IMPERVIOUS SURFACE AREA BUILT AFTER 1997 TO REMAIN = Phone: [phone]
D - - - - - ' ' - / / �323j $ - " - - - _ _ _ J LOWER FLOOR FFE: 332.92 / \ - I--- - - G-/-
\322 $ 32�/i/ �j \ .32 - �_ / ' / / / I ® ® / \ r Fax: [phone]
_ \ , 3,/ / / 29 - _ _ / ASPHALTPARKING _ / I _ - 39 / I I I / I I I 0.53 -0.49 = 0.04 AC
3 3�3' If
FOR REVIEW ONLY
� I TOTAL NEW IMPERVIOUS SURFACE AREA WITHIN SITE BOUNDARY=
�-t1F 33 , / / A R-50.00' 1 \ / ^ NOT FOR CONSTRUCTION
�■o / - , L=45. I 1 I / \ I \ 1 I 8.47 AC '1>t>tmnu011
UFO- - - 33 s s o Ve ■ / / / 1 > NEW IMPERVIOUS SURFACE AREA FUTURE �,� 0
_ 1LV /W V ✓ I / 3. / / /� - `� / I d © �■ / / / \ > II I I I I 2.28 AC
IMPERVIOUS SURFACE AREA TREATED WITH WET POND DRAINAGE AREA'A' _ OFESS/
- w r _ zo I I l o N I ( )
-334 - - - �- - - - " - / T� ' ■ 340 i I 1 =- - : --- �Ia' CD cC�I r I 5.97AC
- 335 - - - - - - - 7°56'04 / / Q N■N la IW IMPERVIOUS SURFACE AREA TREATED WITH WET POND (INCLUDING FUTURE) OS3612
337- ' - - - - I � _____ z■ z I'I II 5.97 + 2.28 = 7.25AC 9 12/24
r.
DRAINAGE AREA A . _ _ -
�. - - - - _ / / - �` \ f I I I IMPERVIOUS SURFACE AREA REQUIRED TO BE TREATED = : A% F Q'-
- I - i- - - - I _ 1 • y D R=50.00' NGINr- \�
� � / -__--_ -----:-:----- - _ _ ��� 8.47 -3.16 + 0.04 = 5.35 AC ��'4 NC/ Shy��•�•
IMPERVIOUS: 7.25-AC I / >.: L-58.94 I nIl EXCESS IMPERVIOUS SURFACE AREA CAPTURED BY SCM = �i� S SO �0
/ I N `'
II '��r folio10
PERVIOUS: 4.80-AC � ' ` - - - - � i / � � ® ® � 3��' - -:- _ _ _ .' � I II � � II I 7.25 - 5.35 = 1.90 AC
I I R_5 .00
/ ' °� C I,/ �- � I I � ■ ■ � ■ ■ � ■ ■ 6' \ 6� /cb , I \ I I II COPYRIGHT 2024 ALL RIGHTS RESERVED. PRINTED OR
TOTAL. 12.05-AC �\ L_ - - �F� - \ - o 0 0 0 m ! l / Q, M L= 4.93 \ I I I I ® ELECTRONIC DRAWINGS AND DOCUMENTATION MAY
I \ \ \ I / I I III I POST-DEVELOPMENT IMPERVIOUS AREA AND WATER QUALITY TREATMENT NOT BE REPRODUCED IN ANY FORM WITHOUT WRITTEN
459.89' I T N �GQ \ PERMISSION FROM LS3P ASSOCIATES LTD.
/o D< S87°52'42"W r C \ l I I I I I EXISTING IMPERVIOUS ADDED BEFORE 1997
■ / REMAINING POST-DEVELOPMENT (0.90 AC) 06
' / \ / / /$„w - ,��-.341= A"RCP I �I
w`
I
/ / - - - eeeee - ® ® Q
/ _- - - ■ 3 f 6 0 W ` \ \ \ , I I„ II I I I I EXISTING IMPERVIOUS ADDED AFTER 1997
^ ■ A2 is \ \ \ O
\ - - 34 d■�' \ \ I I I II REMAINING POST-DEVELOPMENT 0.04 AC
�, - 6 \ b)■oq I \ \ \ \ 111 I l I I ( )
_ - /
Fes ,-344-J - - ® Z w ' \ I I // �\ \ X
_ \ ' - 0
2 - _ 5 \ \ \ �■ ' // l I I ` // \1 OQ I I PROPOSED NEW IMPERVIOUS (8.47 AC)
FUTi W-SBI SBI LOGISTICS I 3 1 ,�'\�
t \ 5'E ••
/ - 4 \ `� \ \ , LOGISTICS BUILDING x III I
3 4, Sv'v' Q w
33 3 �\`;"cs'`� o \ py� I BUILDING PHASE 1 �S \•���1,52 \ I 1 \
\ 1 \ \ \ I • \ I FUTURE IMPERVIOUS (2.28 AC)
PHASE 2 FFE: 345.00 _ \ - I I \ \
-UGP- '- -UFO- -r - -_ -UF6 \ \ \ III
■ \ -UGP- -
I \ ■ \ \ I II �qz> = _ - - 43 \ \ UGP - UGP- - - I -UGP l l I III
C 1 ■ 1 \\ i4 1
e_ ✓ _ 345_ _ - \ / / ' _ , st ` 3- 34 I - - - - - x x / UG C X -1- X UGC )F I - _ _ / I 'i ====5 N DRAINAGE AREA
\ \ \ -�"�- I I / �- _ 44 - - 344 \ I y \
\ W I N \ I - - - \-\- - I
\ \ ■� \ � / / I / � / \ 1 SERVICE � ,
R \\ 1 ■ l \ / \ ` ` \ TIME OF CONCENTRATION FLOW LINE LM LO ° A\\
- 338 3g O
� 2 }�
\ \ \ �� \ (,, FUTURE SBI
U
LOGISTICS TOTAL SITE AREA= 665,666 SF (15.29 AC) N
1
o v, ■ BUILDING \ / \ \ / I`r
Cl) �'g A \ �o ' ■ PHASE 2 1 ® 1 1 I -� \ \ x J 7IL6 \ z
I y, 10' SETBACK \ /\ ■ M \\ \ \ / �' \ \ \ I \ I \ 1 N `*
I10 I \ \ I III 1 NOTES
II IN _
\ \+ ` \ , 340 3 342 343 M \ \` \ M. TIME OF ' I I \ I I III II 1 O Q) N rn
\ \ / ■ \ \ \ \ a I % \ \ \ \,� I III I I 1. THE NET INCREASE IN IMPERVIOUS AREA IS CAPTURED AND TREATED IN THE WET IM I N
\ \\\ \ / ■ \ \\ \ \ \ , l \ TM _ _ 1 \ z CONCENTRATION �I \ \\ \\ \\ \ III IIIII I POND. THE WET POND HAS BEEN SIZED TO ACCOMMODATE THE ADDITIONAL MISSION! N
\ M� IMPERVIOUS.
• \ \ / \ \ \ \ \ a a \ \ I �I LINEAREAA 1 II I I I � C,
\ \ \ 341 _ I f / \ / _ A _ / \ � ch M ■ \ \ \ I I I N
a cP / \ _ \ I I rr V I 1 I I III M , O
\\� \\ \� I / ■ \ \ \\ M \ �\ �� p�` I o I I "� - - -®I I I 1 I I 1 i I I I I 2. FOR STORMWATER MANAGEMENT,THERE ARE TWO ANALYSIS POINTS, 'A' & 'B'. O N 00
'-JOB
I I I I I O I I I ANALYSIS POINT A IS LOCATED AT THE OUTFALL OF AN EXISTING CULVERT(WITH
�
UNDERGROUND I I I I I L
\ \\ \\ \ \ \ \ / I I \ ► ■ I I I I I EXISTING RIPRAP OUTLET PROTECTION) WHILE ANALYSIS POINT B IS LOCATED AT AN ()
334 I w rn\ III ■ I TANK AREA \ I I , I I II I I O N tU W
\ ■ _ / 1 l I � EXISTING STORM STRUCTURE TO THE NORTHWEST OF THE HEADQUARTERS L �
\ - I \ I I \ 11 II �I I II. I ADDITION. O O
\` \\\�` \ \ \ J, ■ M 330 - 1 v' \ \ �'Q ��` 1 cn ch J 1 \\ I 1 kp \ 1 I /
\ �' \ \\\\ \ \\ \ \\ \ `�, •'�, -92/ -f- M Mb• �O / \�\ \ \ �3 "' � \ 1 1 \ I I J I
\ :��335
_ \ srII � A. THE DRAINAGE AREA TO ANALYSIS POINT A INCLUDES BUA AND PERVIOUS AREASa\ O / r I I I ■ I / I I I I I I � a
\\\�\\�\ \ \\ 1 \ ■ \ \ \ \ M �., , I I I I \ / I I I I 1 I I I I THAT ARE TREATED IN THE WET POND. DRAINAGE AREA 'A' IS THE AREA THAT N O M
m I I I q � , DRAINS TO THE WET POND AND THEN TO ANALYSIS POINT A. M � J
cs \ 15"RCP 1 11 1 1\ \ Im \ 1 1 I
\ \ v 24 CPI \ 4" CP- 24"R P 18' RCP / J 1 ■ I I I 1
11 X■ I I \1 1 I 1 I I�I\ I�� II 1 - B. POST DEVELOPMENT RUNOFF HAS BEEN DESIGNED TO BE LESS THAN PRE
1 I I I II 1 r A DATE DESCRIPTION
\ \ `\ \ \ / \ _ \ I I \ I I I I I I I�1� I \ I. I DEVELOPMENT RUNOFF AT ANALYSIS POINT A.
10-10-2024 NGDEO STORMWATER 2ND SUBMITTAL
i► \ 3 \ J' - \\\ �� 3� /, ■ I I C. THE DRAINAGE AREA TO ANALYSIS POINT B INCLUDES BUA AND PERVIOUS AREAS
,I 341. , ■ I I I Y THAT ARE NOT TREATED BY THE WET POND. DRAINAGE AREA 'B' IS THE AREA THAT
O // i}3 M M X J I I I 1 I I I I I I � \ I
\\"` \\\�\ \ _ \ \ \ 3� N �,� �' _ _� \ ' ( R / - 13 / I I I I 1 I I I I I \ DRAINS TO ANALYSIS POINT B.
\,`l \�\ `� \\ \ \� \ 'v' / '' r�'Q \ - , �, : / \ I I I I I \ D. POST DEVELOPMENT RUNOFF HAS BEEN DESIGNED TO BE LESS THAN PRE
\ ` V/ 3� \ I 1 I \ , _ _ \ I -7 Im I I 1 `I DEVELOPMENT RUNOFF AT ANALYSIS POINT B.
\ XI I ' I I I 11 1 II I OHU� !Ii
C),
I 3. THIS DRAWING IS FOR AGENCY REVIEW ONLY- NOT FOR CONSTRUCTION.
1 \ \�A 4. THERE ARE NO WETLANDS ON-SITE (C. DARNELL, SAGE ECOLOGICAL SERVICES, INC.)
ILI
�
Cl) �' X M X( a�o X
/ V
1 l � --------------------
IM - 4 II : \ _ 34 \
\ \ \ \1 c� ch -
4\ / \
>� 4 / I \
\\
ANALYSIS POINT A /,'I 330�\ \ I I/ // -UFo- - 2 3 4 - - - - - \ \ ' ��,
\ \ - \ 10' SETBACK \ ' �0'/�
N890 12'02"E _'_== -; 3 �5 4 47
� . . � . . - - - - _X XX N87°32'04"E
\`::. 1 , /i/ �/ % �_ _ y�■ S �` - 432.31' � + A'
NC RAILROAD COMPANY`:\- :\�`\ \ /// // / i,%- _ - - �- _ _= = - - - --�-_ - _ w 3 350 3Q _ _ ■ �� / _ _ i
\ REID0447149
PIN 1702913322 _ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 1 ■ \ 110 PUBLIC R/W\ \
\ \ 1 1 I \\II �� - 214.94' E. \TRYON RD. -
0 HAMMOND RD \ \1 1 1 1111\ \ z-= -- - y (k 3 (B.H.M.2, PG.78)
�� � 34
4
\ \�\\\\\w\\�
SHEET NAME:
s POST-DEVELOPMENT
STORMWATER
A MANAGEMENT PLAN
y
\ V
\,\ ORIG 2024.09.12
- - \
\ SUBMISSION:
000
\ a
-
\ z
- - SCALE 1"=50' SHEET:
0 50' 160, C=702
1 2 3 4 1 5 6 100% CONSTRUCTION DOCUMENTS
L