HomeMy WebLinkAboutSW5240601_Plansheet - Proposed Drainage Area_20240617 - - - - I 1 II I I I I L,II\\ \ \ \ \ I \ --iI /rr/rri /ii - - Ir��-_"� � �\ "S'G t \ \ \ /1 r/ IIII
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01 II \ / I I \ I \ / / \ I I _ STORMWATER QUALITY CALCULATIONS
7-ADMINISTRA77I01V/DORMS" \
> \ I 2STORYBRICK - - `�\ \ c \ \ \\ \ / - - - III I EXISTING PRE-1997 IMPERVIOUS SURFACE AREA = 4.02 AC
\ \ \ I \ 1 �' I \\GRAVEL\\II \ \\ \ - _ r \ f ® � - \\ ` II \ 1 \ / /' I I - I EXISTING PRE-1997 IMPERVIOUS SURFACE AREA TO BE DEMOLISHED = 2.89 AC
�w \ \ \ \ \GRAVEL \ I \ \ a��O\ \ ��p% r �(I III \ I
&� II
w w \ \ \ \ \ \ \ \ ASPhAL T PARKING � I / a o II \
W_ - _ - \ \ 1 I 1 \ \ \I \ \ \ \ \ \ \ - _ \ �, I- - ` - + I I� ? �/ IN° � `\ \\ 1 // I I NI \ I EXISTING POST-1997 IMPERVIOUS SURFACE AREA = 0.53 AC
/ Q /� II 3 _ II - -I ASPHALTPARKING\ I I/%'�L �lu \ - - - \\ - 1 / ' x I�� 1 i I EXISTING POST-1997 IMPERVIOUS SURFACE AREA TO BE DEMOLISHED = 0.49 AC
CO< \ I I 1 II \ J DIS \
z z Q ` \ , \ , - , / \ \/3 /_ / I III I I DEPARTMENT OF PUBLIC SAFETY
o°� \ \ \ \ , / I TIME OF ` - c \ \\ I U I �I I IIIII NEW IMPERVIOUS SURFACE AREA = 7.82 AC
CO z ` \ \ - ^ 1 �\ 1 I \ / I\Im \\ ` \ 11 \ ` `\ \ \ , �� \�\ II \ I - - \ - - a / Gp� I M I �I I u IMPERVIOUS SURFACE AREA TREATED WITH WET POND = 7.25 AC CENTRAL ENGINEERING
_ _ _ _ - ' / CONCENTRATION N I I i Ih IMPERVIOUS SURFACE AREA REQUIRED TO BE TREATED = 4.97 AC
1 \ ( _ k I- II D
l /\ I\\ \\ / ''l 11 I �\ I �� \` \\ =33> J' - -' - _ �` �Tl/l�7/Tl/� ry - - - - , / �I I I EXCESS IMPERVIOUS SURFACE AREA CAPTURED BY SCM = 2.28 AC
���\\`, � LINE AREA 'B' �° .. /� I � � �I I -� I S,GN,�� \ I p I I IV Plan * Design . Construct
1/ JJ/ ,�. I III Y
` /GEC\> I \ \ \ -� FETERIP" 52.47 r \ \ / III I I
�/ \ �`'� - _�OHT - -OH =- - - r + \ R=15.91 J Q \ -al I , _ _ x I III I PRE-DEVELOPMENT STORMWATER QUANTITY CONTROL
_ a L=28.04 6 53 1 DRAINAGE
- ,� - - � - - - ;� _ . �)ISo , � � -� III I I NC Department
/ \ I _ \ \ \ \ CLAB. _
E c _ - - - - - \ \ \ \ _ /77/Tl/� /7T/ ti ISTG/ O ■ ■ ' h `� I I/ PRE-DEVELOPMENT AREA CURVE Q1 Q10 Q100
`I\ � 133.96' _ 6° " ■, /I I �, 0 �/ IIII I� I (Acres) NUMBER of Public Safety
L \ 1 fit,
GYM/MEDICAL" %}\ - �_ LL LLB L L LLLLJ�LLLLL -UCATVx- STORY BRICK ji LL LL L� - L LLL`L�LLLL- \_ \o` i \\ c� / - LLL LL LL L LLLL L ��� \ UCATV\ \ \\\ �,� �_ ^ ,� \\\ \ \ \ \ \ ,I sr Ly I I� ANALYSIS POINT A 9.83 74 5.01 16.06 30.57
\ \\ \\= \ \\\ _ \`\ -�_� \ \ \ _ \ \ / /� 339 O LLLL LL LLLL L L L LLLL LL p-,� ,/Fn_ / -UCATV- _ - -
- /(\ � ' I \ 00z -/11/l1/�11,/�/L / - I LL III Ip ANALYSIS POINT B 3.38 74 2.05 6.52 12.41
_ \ \ - - _d- -u-UG _� f GRASS I �oI E � x - NOTE: POST-DEVELOPMENT FLOW IS LESS THAN PRE-DEVELOPMENT FLOW AT ALL ANALYSIS POINTS.
\ - S7�AT� OF�(ORTH�� \ ` \ ' _ _ _ � _O RECREATION 343 I \ / - X X X 2 •32' I REFER TO CALCULATION BOOKLET FOR ADDITIONAL INFORMATION.
� . ` '3 \ \ ` - _ - 1 AREA II \
\ CAR04/N/129- ' - ' \ -UGP-- 9 \ ♦ x \ / 168 32' 2 GP- R=45.31' 4° W III
\ - `- 1 \ \ \ /� = I L / I - .-�.y ■ ■ � ■ ■ ���O ♦ POST-DEVELOPMENT STORMWATER QUANTITY CONTROL
\ \ \ \ v' -, 8 F S87 16 29 W L=55.67 II
_ _ \ 3 3- cw P�� 110 \ _ / '� I v i TANK ■ \ L \ o n ■
13C'IL� - �__ c� � o c\I � , 6'- �? � ■ I DRAINAGE
_/ \ _ _ - _-__- '� ■ ♦ o cCA 26 -, -_ AREA
��r�*j' `� \ \ ' ��M I M..w.�■ .T■ ■ �, III CURVE Q1 Q10 Q100
\ \ \ \ \ \ \ I - ,\ \ I - cn _ I II ANALYSIS POINT A (Acres) NUMBER
\ \ \ \ I \ \ \ RElb r75MZ_ - - ��_� - / '--f----j , I `� L - - - - - - �/z S86 08 40 W
1D10 0 \ -J _ , _ _ /D/�15 f\ r ■ I �e I I / I I - I I �■LO o� I� POST-DEVELOPMENT 12.08 82 1.70 21.75 41.20
I ` -- / 1 -✓y/, SHED - - _ �1 � 5P A SCM
// \ I \ I �� \ '7 �I 1 \ O % / \ I/ 7STORY - I I' M ...... I o I� \ ( ) ■
I404 E=*4
T/RI7 _ _ _ _ _ BRICK I ,� I z, ■
I \ I QHT_ \ ®U P- �= Q G�� , ■ "�' / I 6' 1 z / I 434 FAYETTEVILLE STREET SUITE 1700
l \3522 IGARNE RD / W \) - ��.�-C/,. I �., I a I a I I POST-DEVELOPMENT STORMWATER QUANTITY CONTROL
II 6' � _ I � I U � , II � � I / RALEIGH, NORTH CAROLINA 27601
-------------! ____ =__--____/ I - _�_ > I �, TEL. 919.829.2700 FAX. 919.829.2730
/ / RD--- ---------- II I\ - U - - 1 -UGP- C/GP�J86°57'55" T-\ ::. `` I! CURVE Q1 Q10 Q100
�0 \ f � ,--; - - - ANALYSIS POINT B / , a I
GT - 116T I I I DRAINAGE
■ \ ' ANALYSIS POINT B
8 AN / / / ' I �111 . / / -! / \ AREA WWW.LS3P.COM
UGP- - - UG � -
8' SAN 3 A I /
-8 / / �\ �� / 3 �ij _ I' / \ 1 \ _ 18.05' ■ I (Acres) NUMBER
8"'�AN / -`8' SAN \ - T ,�^� sHE_D 1
I /// �/ I _ c `\"' I 97°32'31"E
-I _ - CL/d / / I UGT u,� . . .��� . . . . fir■ o - ° POST-DEVELOPMENT
' - / - / J - - - / _ - _ _ / -� I / F� _�' r 168.17 _� cv R=56.18 4 � E I <
_ _ _ I x x X - L-60.39' ====-s I B (EXISTING STORM 2.56 75 1.58 4.85 9.10
II-_ / < /
, - Irtp NETWORK) TIMMONS GROUP
` f „ "14-SBI GYM" / " 3 x V
�' ' - -_ - - - _ _ _ - - \ I I, 3BRCCKY ■ \ / I 2c�21 I
SHED _ / '� / - i / V `
� � \\\ � \� \ \ 1 I �'i / / ' ' 3 1 - Cp N■rn \ 1 / \\ NOTE: POST-DEVELOPMENT FLOW IS LESS THAN PRE-DEVELOPMENT FLOW FOR THE 1-YEAR,24-HOUR ENGINEERING I DESIGN I TECHNOLOGY
_ - _ CN c\i I I STORM AT ALL ANALYSIS POINTS. REFER TO CALCULATION BOOKLET FOR ADDITIONAL INFORMATION. NC LICENSE NUMBER C-1652
l� / LOWER PATIO // // /' /' ' a \ NIA I I \s I I I I Timmons Group
-316_ , - - -_ _ - _ _ /// / �� _ _ _ _ - - - S- - �� w i / / / / o 0 0 I 10 SETBACK I II III II POST-DEVELOPMENT IMPERVIOUS AREA AND WATER QUALITY TREATMENT Attn: Frank Slinsky, PE
/ -'` - \\_ s DTSH o o ■ / I 5410 Trinity Road; Suite 102
- - -317 1 - �, / // I ��- - ' i , ' - ww�11 I R=50.00 I I I N
-318- ��/ - / s SBI HEADQUARTERS ADDITION I� I Raleigh, NC 27607
- _ ,319 / / 46 L=43.26 I � / � I I
UPPER FLOOR FFE: 346.92 / / / / I I II EXISTING IMPERVIOUS ADDED BEFORE 1997 Phone: 919.866.4505
� 3`� \ � $, -� - - - - --UGP-�- -- jG-P=� - _J - �o / ' / / � ' ` ♦ L I
D =- - - - _- , -- _ \ 2� - 2 _ - - _ - - , _ - - - _ _ , / _ - - $ LOWER FLOOR FFE: 332.92 / / \ \ ♦ _ +- - G-,- \ I I REMAINING POST-DEVELOPMENT (1.13 AC) Fax: 919.859.5663
322�ti5 3 �/ �� \ .3 �- 33 / / I
_ / ASPHALTPARKING _ / I _ _ _ _ - -�- 9 / FOR REVIEW ONLY
33 / f f �� II `♦♦ I' \\ I I I I _ //�I I EXISTING IMPERVIOUS ADDED AFTER 1997
NOT FOR CONSTRUCTION
__ _ _ ___ __ �''3 a ` T II - REMAINING POST-DEVELOPMENT 0.04 AC
f - ' / / - - _ -t1Ffl� _ .♦M 33 i /3 �` �� / R=50.00 1 \ \ / - ( )
�0�� - � - - J '// ��� A
!� UFO- - F / 3 $ s_ s a a/a M ■ / / \ \ = .` OFESS/ y-9 :
/ I / / 33 v / I , / / ❑ ® - �,- PROPOSED NEW IMPERVIOUS (6.81 AC)
_334 / / /11
- _o / / / �6� , I �V T I� r rn N I =
_ _ _ _ _ _ _ _ _ _ _ _ 0 3612
Il ' _ �3336 - - - - - _- - - - - / - / ' � � � - -�` �. . .3� .:°56 J I / / Q C:) IN I I 6 0/2�
/ I � / 337- - _ - - - - _ _ i ,\\\ z■ z i'I I� ��q FNGINE�� ��
- _ _ - - - - l / „W D M 1 I I DRAINAGE AREA �'�NC�S SLINs�``.`�.
/ $� - I 6 F/ B - // 1 R=50.00
L 58.94 II
_ i % N 1 ' pl III
ASPH L T p,4RK/NG J I / o I u
"I I /L�/ / /11/ /J��/ ■ ■ 5, �� R=5 .00 I 1 I I III I TIME OF CONCENTRATION FLOW LINE
/ \, 1 D I COPYRIGHT 2024 ALL RIGHTS RESERVED. PRINTED OR
L ■ . , a a o a O Q L= 4.93 . ELECTRONIC DRAWINGS AND DOCUMENTATION MAY
SAS \ \ 1 / I III I I - - NOT BE REPRODUCED IN ANY FORM WITHOUT WRITTEN
_ .. .:59� . . cv S/r/� -�sr �5'�GP \ ^�' \I \\ 11 I X I I I III TOTAL SITE AREA = 665,666 SF (15.29 AC)
PERMISSION FROM LS3P ASSOCIATES LTD.
,341 S87052'42"W
- - - #�-� - - 18"RCP b �� I I I I I I I\ I 06
/8 W�� / (/ � ,�`�q34wv = _ - - - 4 3 l \ 1 I NOTES
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\ / /' // / /' / c��^ ■ / - £ n 1"�2/ UGP `' 344 346 \ �■1 11 I \\ `\ \\ \ I IIoV IM I 1. THE NET INCREASE IN IMPERVIOUS AREA IS CAPTURED AND TREATED IN THE WET rM
341 3 _ � \ I , \ 1 I I I 1 POND.THE WET POND HAS BEEN SIZED TO ACCOMMODATE THE ADDITIONAL O
1 r- \1 \\ XI I I I �J I IMPERVIOUS. ■�
\ \ \ ■ L ` i
345 345 3 , ` �+ 2. FOR STORMWATER MANAGEMENT,THERE ARE TWO ANALYSIS POINTS, 'A' & 'B'. }+
e e e ele e e e e e e e e 4 \ \ FUTURE SBI SBI LOGISTICS 5 \ „E _® , / I I / - / 1 I / I ANALYSIS POINT A IS LOCATED AT THE OUTFALL OF AN EXISTING CULVERT (WITH ■
/ \ \ � - ` - - �3 w w � `� \ 40 6'e e e 4\ - I ,�, LOGISTICS BUILDING \ 7Z°0��� I / / / / I I EXISTING RIPRAP OUTLET PROTECTION), WHILE ANALYSIS POINT B IS LOCATED AT AN
\ \■ \ / C0 BUILDING PHASE -1 \ Qs *\,a �11A 5Z \ I I I 1 I I I III I EXISTING STORM STRUCTURE TO THE NORTHWEST OF THE HEADQUARTERS
\ I \ \ \ \ 1 - PHASE 2 FFE: 345.00 _ \ I \ \ �� I I ADDITION.
w I \ \ \ 111 PARKING SPACES I \ 345`Y I _ \
N I \ \ \\ \ I BASE BID: GRASS 34p , ` v�Q \ - ■ \- -UGP UFO- - -UFO- -�- - -� UF6 \ \ \ III
■ \ G, '-UGP- II A. THE DRAINAGE AREA TO ANALYSIS POINT A INCLUDES BUA AND PERVIOUS AREAS
I `\ ■ \ \ \ 1\ 1 3g ' -- �_�_= 34 = - `_ - - __- I \ � UGP - - /" UGP- - - �- -UGPI � � � Q
�j - I I THAT ARE TREATED IN THE WET POND. DRAINAGE AREA A IS THE AREA THAT
X / UG C X X UGC � _ i ====s II DRAINS TO THE WET POND AND THEN TO ANALYSIS POINT A. �/�
I 344 I I' 1 < \� I� `//
\ 1 ■� \ \\ \ /// 1 SERVICE I I 1 \; I B. POST DEVELOPMENT RUNOFF HAS BEEN DESIGNED TO BE LESS THAN PRE L
` ■M I \ 338 0 / I AREA
R \ \ Flo 338 , . - 3 \ \ �c I I II I / _ DEVELOPMENT RUNOFF AT ANALYSIS POINT A. O
\ \\ \ ,
\ \\ \\ \ I I O �, \ ASPHALT I I _� �� - -�'� !I r C. THE DRAINAGE AREA TO ANALYSIS POINT B INCLUDES BUA AND PERVIOUS AREAS �+
FUTURE SBI 1\ I w JJ 11 / THAT ARE NOT TREATED BY THE WET POND. DRAINAGE AREA 'B' IS THE AREA THAT L N
LOGISTICS I I - - \ I�f I•, I DRAINS TO ANALYSIS POINT B.
-
.� ` 't . \ \\ I BUILDING I� U
■ \ \\ , / ' 3�2 ' �/\ I ■ PHASE 2 ® ' I\ I \ \ x Jd I D. POST DEVELOPMENT RUNOFF HAS BEEN DESIGNED TO BE LESS THAN PRE z
10 SETBACK \ ■ \\ \
\ \ \\ \ \ \ I \ I I \ �I II \ DEVELOPMENT RUNOFF AT ANALYSIS POINT B. rM
- � 3 42 0 4 0 11
' \ \ ' N■ti TIME OF / I I I \\ \ II III�� I 3. THIS DRAWING IS FOR AGENCY REVIEW ONLY- NOT FOR CONSTRUCTION. Cr O O 0
`� � CONCENTRATION � \J \ \ \,�� Jill, 1 I .� � � M
zl /� \ \ \ \ \ I I IIII I 4. THERE ARE NO WETLANDS ON-SITE (C. DARNELL, SAGE ECOLOGICAL SERVICES, INC.) }+ - N
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\ r SHEET NAME:
POST-DEVELOPMENT
STORMWATER
MANAGEMENT PLAN
- - ORIG 2024.05.31
- - \
- \ SUBMISSION:
00
/ - z
/ SCALE 1"=50' SHEET:
0 50' 160, C =702
1 2 1 3 14 5 6 DESIGN DEVELOPMENT
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