The URL can be used to link to this page

Home My WebLink AboutSW5240601_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 I 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 / _ - - LU I I� \ / /' // / /' / 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 ■ LINE AREA 'A' IIII I M 04 1- I z I I / O N 00 \�`\�`\ ` I ■ \ 1 \ \ \ f \ I I I \ �ee®r-SD i I of I I > M C� 0 `\\\\\\` \\ \ \\\ \ I \\ -� / I- 1 \ I \ 1 I x■ 1 I UNDERGROU6 I I I I III I L H U `.cam n 334 u'S / 1 l I I I ■ 1 I TANKAREA \ # I I I I I I IIII I I O W W �` \`\\\\\\`\�\\ \`\\ ``� ti,ti \ ■ ch 330 L RcP / \ \ \ TO L STAFF �v, I I \ \ I I I \ ► x I (D \ \\\ `` I I "'cp O v'z, / I 1 � I IIx■ / 1 I I I II I a s PARKI o SPACES / I 1 I ■ / I r �� o a \ \\ 1 ■ \ \ C`� M I ` ( I I \ 193 SPACES WIT 5 ADA SPACES I I I I I 1 I �I 1 NCY) O Cl) M \�\\ � _ ' N \ \ \ \ 1 / / \\II I I I .. \ \\ \ \ \ CV 11 / 15"RCP 1 Im \ 1 \ 624"RCP 24"RCP / 24"RCP 18' RCP I f i I \ I I / ' I X 11I�I I 1 1\ M J ,/ IIII x■ I I I I I I I I �I\ I��I \ xx A DATE DESCRIPTION `8 �► \ "' ` \ I �, - 33 g ',\\`\ \ \ 3�° �' S' 9�3�i // ' 1 I Im ,341 Mom/ fix■ I I I I 1 I I \ I I j/1343IG B \ w \ x l I I I I \ \ 1 \ / / / / \ \ 1 1 I 1 I f �ONU \ Sco )( \■ w I I 11 I 1 �\ I 1 \` \ M / _ - - - - - \ \ \\ ■ - 344 \ I 1 \ 4 Q �s \ II ANALYSIS POINT A - - I I \ \ a•nf I I \ \\ \ \ / ♦ _ _ - _ _ / - ' 3 10' SETBACK \ ' /ti�0 /I I N89°12'02"E _ ■ \ \ _ - ' __- - - - -- 3 45 4 �aA.- T T 1 / / ■ ■ ■ r _ _ X J 272.12'_ - - - -__ _-_ `5 - _ - - - - X - 2�� \ ,;r __ - = ` S u? R_ 432.31' i c 4 \ NC RAILROAD COMPANY` ` /////// /j//.= ____ �_- -- __ _ _ -_ ___ - - _- _= _�9 - _ _ _ \ _ \ DB00, PG.00 \ \ // ///�///� i/� - - - -_- _ _ - - - - - - / - _ �w ,� „/ - - / _ 177 7� }l o RE1D0447149 \ ' _ - - - - - - - - - -� - / _ - '�� P1N1702913322 _ -- - - - - - . . ■ . � ■ ■ � ■ ■ � ■ ■ � ■ ■ � . ■ \ \ 1 I 1 11 I (( /// / - _ / �--L�- - - 7- �� \ 110 PUBLIC RNV \ \ \ II 1 I (iu1 r /. - _ _� -- . 214.94 E. �TRYON RD. ` \ - ` - - - 0 HAMMOND RD \11�1 1 IIII\ \ I l/1� �s �6 ��5 ��(k ��3 !j�' 3/ (B.H.M.2, PG.78) 344 - -- \ 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 L