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HomeMy WebLinkAbout1993-11-23 Stormwater Report C H OR`15"'T I A N S E N & SERGI, 'INC. PROFESSIONAL ENGINEERS AND LAND SURVEYORS 160 SUMMER STREET HAVERHILL, MA55ACHUSETTS 01830 (508) 373-0310 FAX: (508) 372.3960 I i SUPPLEMENTAL INFORMATION FOR THE PW% DEF11%l1T1Vh..` P*.R-OD40 UBDI V- ISION FLA-N ry W_1119 -E -*BIB C-,,/ LOC,4 TED IN NOR 'T'N -A IVD 0 V-ER MA . RECORD 004ER Wf-7 / TE BIRCI .� l.i lJ) /s T)?# IIv co & APPLICANT : 380 ESSEX ST,N LA WRENCE MAr DATE: 8/13/9.3 SUPPLEMENTAL INFORMATION FOR T3 1 DEFINITIVE P. .D* SUBDIVISION PLAN OF WRITE BIRCH II Index Section I Soil Analysis Section T Hydrologic Analysis Section III Erosion and Sedimentation Control f SECTION I SOILS ANALYSIS ■ i i SECTION SOILS ANALYSIS i The Soil Conservation service Survey of Essex County, Northern Part, shows the following soil types found on site De - Deerfield loamy fine sand, nearly level Hydrologic soil group: 1oC Montauk fine sandy loan, 8 to 15 percent slopes Hydrologic soil. group: C aC - Paxton fine sandy loam, 8 to 15 percent slopes Hydrologic soil group: C PbD Paxton very stony fine- sandy loam, 15 to 25 percent slopes Hydrologic soil group: C WnC Windsor loamy sand, 8 to 15 percent slopes Hydrologic soil group: WrB Woodbridge fine sandy Loam, 5 to 8 percent slopes Hydrologic soil group: C Figure 1; Soil Conservation Service Soils Map shows the boundaries of the soil types on and around the project site. a � I pe i Dex De i { * W-n. f L,k42 U D �'*{h}f ,- '#*+f i,*-•'• : # , {mow+ a S(TE D e' it��x i+-. * # t 4.•� F�'* _ t t' •,r fir• *' y���.yam,_r:* y {J�rw Ic n ' +. + }� a ♦ +:{f - PbD 1 + WaB + ' � { + 4 - a FIGLIRE 501�5 SCALC: IT i f SECTION l HYDROLOGIC ANALYSIS f ' i I SECTION I i HYDROLOGIC ANALYSIS hydrologic analysis has been performed to determine L { what impact the development will have on the drainage conditions of the surrounding area* when a site as developed, the characteristics of the land often change an such a. way as to increase the amount of stor w ter runoff that leaves the site. This analysis will determine the extent of the additional runoff that the development will produce, and also provide a solution that will ]peep post development runoff rates comparable to existing runoff rates. The hydrologic analysis performed for this site consists of the Soil Conservation Service method of determining runoff values and a computer model that uses a rainfall intensity p . pattern for an S.C.S. rpe II Storm and a unit hyd ograph. t develop runoff rates. Calculations were performed -to compare existing and post development runoff rates from storms of 2 . 10 and too year recurrence frequenciest s shown on FigureExisting Drainage Condataonst the area that contributes runoff to the project site consists o the 10 acre project site and 4 acres of additional property that lies between the project site and Bradford street. This watershed area, drains generally from the top of the hall near Bradford Street to the western and southern borders of the site Existing and post-development runoff rates were calculated to determine the peak rates along both the western i i i and southern borders of the site. The area identified as drainage area I of Figure 2A consists of 8 .6 acres of the proect watershed that drains to the western border of the site. The area identified as drainage area 2 consists of 5 .4 acres of the pro ect watershed that drains to a small stream along the southern border of the site. The following Table lists the peak rates of runoff from drainage areas 1. and 2 under existing conditions for the 2 , 10 and 100 year storms: 'fable' l: Peak Runoff Rates Cinder Existing Conditions IP D aina a Area 2 y storm 1 o 'yr storm 100 year storm I (to west 2 . 3 cfs 1 .4 c s 17 .2 c s (.to - south) 4 .5 cs 9. 8 cs 1. .4 cs Figure 2 : Proposed Drainage Conditions, shows the watershed divided into 4 drainage areas under post- development conditions. Drainage area 1 consi-sts- of 3 . 6 acres of the project site that will, drain to the 'western border of the project site. Drainage area 1A consists of 5.2 acres that will drain onto the proposed roadway and into the subsurface drainage system that empties into the proposed i detention area. Drainage area 2 consists of 3. 1 acres that will drain to the stream along the southern border o . the site. Drainage area 2A consists of 2 . 3 acres that will. drain into the proposed detention area by overland flow. The proposed detention area, which will control the runoff from drainage areas 1A and 2 , will have an outlet that will dram into the stream at the southern border of the site. The total peak runoff to the southern border will therefore consist of the peak value resulting from the addition of the detention area outflow to the drainage area 2 runoff. The following table lasts the peak rates o runoff from drainage areas I and 2 under the post-development en.t conditions for the 2 , 10 and 100 year storms Table 2 : Peak Runoff Rates Cinder Post-deve102ment Condi ions Drain s a area 2 yr storm 10 y storm 100 year storm 1to west 2 .0 s 5. 0 es ens 2 to south) ' 4 *5 os 9.4 cfs 1 .0 cfs When the results from Table 2 are compared with the results from Table 1 it is apparent that wiLth the mitigating effects of the detention area, the peak rates of oftsite r runoff under post-development conditions will be equal to or less than peak rates of offsite runoff under existing conditions. The following information has been included to support the results of this analysis Figure 2A: Existing Drainage Conditions Figure 2B: Proposed Drainage Conditi.on.s - Runoff Calculation worksheets -for drainage areas I and 2 F under existing conditions and for drainage areas 1, 1 ., and 2A under post-development conditions* - ra dro h and detention area data for the 2 year storm g p - rdrographs and detention area data for the 10 year storm - dro ra hs and detention area data for the 100 year storm� p . 41 a C) 114 r - • i # 0 i DRAINAGE AREA ` 6RAINAGE ARM a ip + FIGLIRE F.,XlsTlH6r DRAINAC75 C086MONS IL *4001 SLa 2 l 41 dft + * # t - I • 10 46 Wal i f f +' aI AOA 1A IL Now 44 M + i a • r a x a ' k k a� • i 4 f # t + + y * i t # i } + ' i + • LIRE NA C Nl 5 CA C- 400 [ Runoff curve number and runoff R A3 Project ............ � � �� Date-------- Loc att0ri � ��_.... Checked Date Ci rc tc one: Present Developed Ru o f f curve number (C1 Soil- name Cover description � AreaProd ct d C twdrol_ooic (cover type, treatment, and � area hydrologic condition; ,acres group ' c '? -percent impervious; W El mi unconnected/connected impervious oo (appendix area ratio) P6 Wr 6 � -�' Vt 0 0S FA I W 00 b S CA I I o.+ Wn WOOOS FAO� 3*9 14ot4 . 478, 3 Use only oneCNsource per 1111e. Totals total product 4 41 C (weighted) ._ �- �� Use CN total area 2. Runoff storm #1 Storm 02 Storm # 10 00 Frequency . i • i • # r L 4- RainfalL, P hour) • i i • in Runoff, Q o-77 1, 8o (Use and C with table 2-1, i.g. -1, or e q . 2-3 and 2- . Longest Flow Path 800 ft . Avg . Slope �, �' �. .Y.m. �. $: n . o . of Time ncrementi �. Area o trlbntl Inc . a Work-sheet 2: IZUnOff CUrve number and runoff Project B }0, Date 9193, • Loeat toy ' Checked Date Circle one: Present Developed 1 , Runoff curve number (CAI) Soil name Cover description Area Product CN of hydrologic (cover type, cre tment, -and f%J CN x a rea group hydrologic condition.; pqaores percent impervious; Oj Omi unconnected/connect, impervious o w El appendix A area ratio pac I lc 4 ; C %6 WC)o I)r> r-A Ifz, 100010 11 A 664.0 1 h �. Use o�1 One C per lines o is5 4 376,.� source CN (weighted) tor-a rod 6, Use .. .� total area i .�- • . Runoff Storm Storm #2 Storm #3 0 00 10 Runoff, Q 0 4 .0 P 6 0 IP 9 0 in 0,76 1165 Use P and C ' with table -1, fig. -1, or eq . -3 and - . Longest low P t706 � . Avg . to pe � �` �� Fn - Io . of Time Increments Area Con tribu tin Inc # ao 'moo�rj ile . �� n curve 11 � runoff Aot- Project By Date Checked Date Lo attonb(A. Circle one, Present Dec . IN I . Runoff curve number Area Product i name Corerdescription ; CN o and CN area hy droloio (corer type, treatment, and co ditioa; 1 ,acres group roa percent impervious; (0 u�nooneted/connected irperou ° area ratio) (appendix WOOC)S - A IK - M CAC9E 12 E�S r0, 56sc) r� ti )z41Z ------------- F . • Totals �- Use only one CN source per �. t total product �� - Case C; Cweted Y total area 4 t 2. r Stan FStorm #2 Si r i 4 yr Frequency . . . . . . r . f # . f ■ , , , . 4 . . # . ■ # f # • rt . • 6,* # y'+y yin 4 1-5 z Runoff, Q . . . . . . . . . . . . . . . . . . . . . . . . . . . ■ . . .� (Use P and CN with table 2-1� fig. r eqs. 2-3 and - . Long t Flow Path :30 Io P'e 2,-Z 7 Tc 8min # . of Tim Increments ' Area Contributing/ Inc ac Work'shee 2: lzun<)ff curve number and runoff �- �- .YDa te Lo at[on Checked Date loped ('Jrcle- one: Pc-es t (FDeve I oped L'I�-A-IfM 6t en �R iwnaff curve number (CN) Area Product Soil name Cover description l x d CN -� o hydrologic (cover type, c re tment, and c CN x area I group hydrologic condition* acres percent -ervi-o s; 0 c c mi unconnected/connected imperviousO CID (appendix A area ratio) 7.3 15313 ACRE. a Z+ 0 ## 160 015 &31 0 Whc ACKE P 54 91, 8 Use onlyone C source per line. Totals _ 5 2 3471 total product Use CN CN (weighted) total .area + . Runofff� Storm #1 Storm # Storm 00 Frequency -4 L u L • # # # # • • # i • # • # • i . • # in 4 + . t4,S7 Z48Z (Use P and Chi wich table -1 , fig. -1 , 5 or eqs. 2-3 pnd - Longest Flow Patti :500 ft . Avg . Sl.p13,07,, min . Ind , of Time ncr men'ts Area 'C ntr but n Inc . � �.. a W rk hest 2: Runoff curve number and runoff B �� Da te 3 Project WH E&A �. - ti �� = CheckedDate ;l rc lo- one: Pr ent Developed R A W 1 . J tjr)o f curve number Sail name Cover description Area Product CN o and h ro e (cover type, t atment, and � rea r uphydrologic condition; , i� acres EI MI percent impervious', unconnected/connected Impervious � oa (appendix A) area ratio PAC PbbJA>C WOOVS - pf/p"Ilk w 00 bs f/f/P11 73 zt 1 13 . r r _A r , woot - r .......... ........ . ..... 0 R 3, 1 E Use only e CAI source per lire. - Totals total product �. _ CN i hto 0 s Cif total area . ,Runoff Storm 1 Storm �2 Storm 11 ■ r x Frequency # i • • • . # • . a . # i • # # i # ■ #i # W . • . # # ## J. ' Y } 4,S 614 a�. f 1 2 our .. # . o, 66 �� 2,► nor, 3. + (Use P and CN wich table 2-1 , fig. 2-1 , or eqs. 2-3 and i- . Longest ow Patti '7 0 f t Avg Slope % `Fc . . � min . O . Time Increments � Area C ntri bu Li I ,SS' ac I W r eet 2: Runoff curve number and runoff i B Project WHIC C ..�. Lo Ca t t o _ Da t Checked Date Circle, one: Present A U. I Runoff curve number C # f i Soil name Cover description area Product C o and hyd ro ug e . cover type, treatment, and CN x area group hydrologic condition; acres percent impervious; El mi�' unconnected/connected impervious ao (appendix area ratio) �. RNC pbblmoc ADDSlt4, Moc 6 A) 04 pl"bow— -7E/%/] WAI?r,A) 5 ' Use only one CN source per line* Totals 17413 t tal product t 17413(weighted) —/SO S tor-al -area . Runoff Storm #1 Storm #2 Storm #3 F'requency . . . . . . .'. .. r • • « . . .. . . s . . 5 Rainfall, P u .. . . . . . . . .. . . . . . . . n 4, 1103 u o f • • r s a r r • . • . • • • • . a • • . • • • • • • • • r • n (Us e P and CN with to fig. - f or eq . -3 and 2- . Longest low Path 600 . S I o p'e 15, 0 7 Tc 6, Z No . of Time Increments Area Contri u i Inc . ac CLIENT - WHITEDIRCH II DATE - 7/27/93ISTING C0NDITI0NS - DRAINAGE AREA 1 �x CDNDITI0N - FILE NAME - WE1-2 . pERI01) ST0RM - 2 YEAR8 TIME. FL0W TIME, FL0W, ^ H0URS CFS H0URS CFS 9 . 020811312 12 2.3 9. 1 . 07 12. 1 1 . 36 9. 2 . 07 12. 2 9. 3 . 07 12. 3 . 31 9. 4 . 07 12. 4 .22 9. 5 . 07 12. 5 . 22 12 . 6 22 �. 6 . 07 . 9~ 7 . 07 12. 7 . 22 9. 8 . 07 12.8 . 22 12. 9 22 9. 9 . 07 . 10 . 07 ` 13 . 22 10. 2 . 1 ' 13. 2 . 1 13 3 1 10. 3 . 1 ^ ^ 10. 4 . 1 13. 4 . 1 13 5 { 10. 5 . 1 ^ ^ 10. 6 . 1 13. 6 . 1 13 7 . 1 10. 7 1 . . 10. 8 . 1 1 1 1390. 9 . 1 ^ ^ 14 1 11 . 1 ^ . 07 . 11 . 2 . 22 14. 2 .05 14 3 05 11. 3 . 22 ^ . . 14 A. ^05 11 . 4 . 22 ^ 14 5 05 11 . 5 . 27 ^ 11 . 6 . 41 14.6 11 . 7 . 77 14. 7 . 05 11 . 8 1 . 14 14. 8 .05 11 . 9 1 . 06 14. 9 . 05 DIRECT RUN0FF - . 24 INCHE8 AREA IN AC RES p0R TIME SEGMENT 1 = 4. 3 AREA IN ACREB p0R TIME SEGMENT 2 = 4. 3 | | ! ! ' | | ' | . pR#0 CLIENT - WHITEBIRCH II DATE - 7/27/93 | CONDITION - EXISTING C('jNY-)ITI0NS - DRAINAGE AREA 2 FILE NAME - WE2-2 / PERI0D ST0RM - 2 YEARS TIME, FL0W, TIME. FL0W. H0URS CFS H0URS CFS 9 . 041380632 12 4. 52 911.5 12. 1 2. 68 9.2 . 15 12. 2 1 . 07 12. 3 . 61 9.4 . 15 12. 4 . 38 9.5 . 15 12. 5 . 3B 9.6 . 15 12. 6 . 38 9. 7 . 15 12. 7 . 38 9. 8 . 15 12. B .38 9. 9 . 15 12. 9 . 38 10 . 15 13 . 38 | 10. 1 . 15 13. 1 . �1 . 10. 2 . 23 13. 2 .23 10. 3 . 23 13. 3 10. 4 . 23 ' 13. 4 . 23 10. 5 . 23 13. 5 . 23 10. 6 . 23 13. 6 . 23 10. 7 . 23 13. 7 . 23 1018 , 23 13^ 8 ^ 23 | 1019 . 23 13. 9 . 23 11 . 27,3 14 ^ 23 11. 1 . 31 14. 1 . 15 11 . 2 . 38' 14. 2 .08 �1. 3 . 38 14. 3 . 08 11 . 4 . 38 14. 4 . 08 11 . 5 . 54 14. 5 . 08 11 . 6 . 84 14. 6 . 08 11 , 7 1153 14^ 7 ^ 08 i 11 . 8 2. 3 14.8 . 08 ) 1119 3. 75 14^ 9 ^ 08 | | DIRECT RUNOFF - . 76 INCHES AREA IN ACRES FOR TIME SEGMENT 1 = 2. 7 AREA IN ACRES F0R TIME SEGMENT 2 = 2, 7 | i � i | i |� | � � ) ` CLIENT - WHITEDIRCH IT DATE - 7/28/9� CDNDITI0N - PR0P08ED C0NDITI0NS - DRAINAGE AREA 1 FILE N�ME - Wp1-2 PERIOD STORM - 2 YEARS ` TIME, FL0W. TIME. FL0W. H0URS CFS 110URS CFS q . 03266892 12 1 ~ 68 9. 1 . 05 12. 1 . 5 9, 2 . 05 12. 2 . 32 9. 3 . 05 12. 3 . 18 9. 4 . 05 12. 4 . 18 9. 5 12. 5 . 18 9. 6 . 05 12. 6 . 18 9. 7 . 05 9. 8 . 05 12.8 . 18 i ! 9. 9 . 05 12. 9 10 ^ 05 13 . 18 0. 1 . 09 13 1 . 1 . 09 . 10. 2 . 09 13. 2 .09 10. 3 . 09 13. 3 . 09 | � 10. 4 . 09 13. 4 . 09 | . | 10. 5 . 09 1 . 09 10. 6 . 09 13. 6 .09 10. 7 . 09 13. 7 . 09 1 | " . 10. 8 . 09 13. 8 .09 10. 9 . 09 13. 9 . 09 11 . 09 14 .09 11 . 1 . 18 14. 1 . 05 11 . 2 . 18 14. 2 . 05 11 . 3 . 18 14. 3 . 05 11 . 4 . 1B 14. 4 .05 ! 11 . 5 . 23 14. 5 . 05 | � 11 . 6 . 45 14.6 .0� � 11 . 7 . 86 14. 7 ^ 05 ' 11 . 8 1 14~ 8 .05 11. 9 1 . 95 14. 9 ^ 05 DIRECT RUNOFF - . 45 INCHES AREA IN ACRES FOR TIME SEGMENT 1 = 3. 6 � ! | . ` ' ` | - CLIENT - WHITE8IRCH II ' DATE - 7/28/93 C0N DI TI0N - pR0P0SED C0NDITI0NS - DRAINAGE AREA 1A , FILE NAME - WP1A-2 PERI0D ST0RM - 2 YEARS TIME° FL0W. TIME. FL0W. H0URS CFS H0URS CFS 9 . 066063816 12 3. 3 9. 1 . 13 12. 1 1 . 02 9. 2 , 13 12. 2 . 64 9. 3 . 13 12. 1� . 32 9. 4 . 13 12. 4 . 32 9. 5 . 13 12. 5 . 32 9. 6 . 13 12. 6 . 32 > 9. 7 . 13 12. 7 . 32 � 9. 8 , 13 12. B . 32 9. 9 . 13 12, 9 , 2 10 . 13 13 ^ 32 | | 10. 1 . 19 1311 . 19 ' / . ! 10. 2 . 19 13. 2 10. 3 . 19 ' 13. 3 . 19 10. 4 . 19 13. 4 . 19 10. 5 . 19 13. 5 . 19 10. 6 . 19 ' 13.6 . 19 | � 10..7 . 1 9 13, 7 . 1 9 - 10. 8 . 19 13,8 . 19 10. 9 . 19 ' 13. 9 . 19 | 11 . 19 14 | 11 1 . 32 14. 1 . 06 ^ | 11 . 2 . 32 14.2 . 06 11 . 3 . 32 14. 3 . 06 | 11 . 4 . 32 14. 4 `06 | 11. 5 . 51 14. 5 . 06 < 11 . 6 . 83 14.6 . 06 11 .7 1 . 65 14. 7 . 06 11 . 8 1 . 97 14.8 . 06 � 11 . 9 3. 94 14. 9 . 06 DIRECT RUNOFF - . 63 INCHES | AREA IN ACRES F0R TIME SEGMENT 1 = 5 . 2 | | ` | | - | PR#0 CLIENT - WHITE8IRCH II ' . DATE - 7/28/93 C0NDITI0N - PR0P0SED C0NDITI0NS - DRAINAGE AREA 2 FILE N(iME _ WP2-2 PERI0D ST0RM - 2 YEARS | ' TIME, FL0W, TIME. FLOW, H0UR8 CFS H0URG CFG 9 . 021254964 12 2. 33 9. 1 . 07 12. 1 1 . 37 9. 2 . 07 12. 2 . 55 9, 3 , 07 12. 3 9. 4 . 07 12. 4 . 21 9. 5 , 07 12. 5 . 21 ! ! 9. 6 . 07 12. 6 . 21 9.7 . 07 12. 7 . 21 9. 8 . 07 12.8 . 21 9. 9 . 07 12. 9 ^ 21 10 . 07 1 21 | / 10^ 1 . 07 13. 1 . 14 | [ � 10. 2 . 14 13. 2 . 14 10. 3 . 14 13. 3 . 14 10. 4 . 14 13. 4 . 14 ' 10. 5 . 14 13. 5 . 14 10. 6 . 14 13.6 . 14 10. 7 . 14 13. 7 . 14 10. 8 . 14 13. 8 ~ 14 10. 9 . 14 '1 9 11 . 14 14 ~ 14 ' _ 11. 1 . 14 14. 1 . 07 11 . 2 . 21 14^ 2 ^ 07 11 . 3 . 21 14. 3 . 07 11 . 4 . 21 14. 4 . 07 11. 5 . 27 14. 5 . 07, ` 11 . 6 . 41 14.6 .07 11 . 7 . 82 14. 7 , 07 11 . 8 1 . 17 14.8 . 07 11 ^ 9 1 . 92 14, 9 . 07 DIRECT RUNOFF - . 68 INCHES AREA IN ACRES FOR TIME SEGMENT 1 = 1 , 55 AREA IN ACRES F0R TIME SEGMENT 2 = 1 . 55 | . . � � i | | ' � PR#0 CLIENT - WHITEDIRCH II DATE - 7/28/93 | | C0NDITI0N - PROPOSED CONDITIONS - DRAINAGE AREA 2A FILE NAME - WP2A-2 PERI0D ST0R11 - 2 YEARS TIME, FL0W, TIME. FL0W. | | H0URS CFS 1-10URS CFS 9 . 049628526 12 2. 59 9. 1 it 12. 1 . 76 9. 2 . 11 12. 2 . 54 9. 3 . 11 12. 3 . 22 9. 4 9'. 5 . 11 12. 5 . 22 / 9. 6 . 11 12^ 6 . 22 9. 7 . 11 12. 7 . 22 ' 9. B . 11 12.8 . 22 9. 9 , 11 12^ 9 . 22 i 10 . 11 13 ' ^ 22 � � 10. 1 . 11 13. 1 . 11 10. 2 . 11 13. 2 . 11 10. 3 . 11 13. 3 . 11 ' 10; 4 . 11 10. 5 . 11 13. 5 ' 10. 6 . 11 13. 6 10. 7 . 11 13. 7 10. 8 . 11 13. 8 . 11 ! . . . 10. 9 11 13 9 11 l 11 . 11 14 11 . 1 . 22 14. 1 0 11 . 2 . ''` 14. 2 0 . 11 . 3 . 22 14. 3 0 11 . 4 . 22 14. 4 0 i | 11 . 5 . 32 14. 5 0 11 . 6 . 65 14. 6 0 � 11 . 7 1 . 19 14. 7 0 11 . 8 1 . 51 14. 8 0 | i 11 . 9 3. 02 14. 9 0 / DIRECT RUNOFF - 1 . 07 INC11E8 � AREA IN 'ACRES FOR, TIME 8EGMENT 1 = 2. 3 | � ! )� � - � | � ! i WH 1�' 1 R H 11 -� PROPOSEDCONDITIONS -- DRAINAGE AREA 2 � DETENTION AREA OUTFLOW � �:4':;t� 7/2e/93 2 YEAR STORM 'fo r 0FFSET .. ., 0 ■ 0 0 TOTAL _ 1 0 0 0 , 2 07 01 0 0 .08 :f 4 .07 .01 0 0 .08.0018 .�.' 7 .07 0236 0 0 ■0936 B .07 ,0-4 5 0 0 ■1 175 ; .07 .0487 0 0 . 1107 10 .07 .0791 0 0 ,1491 �. 11 .07 .0923 0 0 .1623 1 ■07 . 1061 0 0 .1761 13 .14 .1094 0 0 .2494 � 14 . 14 . 1376 0 0 .2776 ; 15 .1 .1672 0 0 .307 i 16 . 14 . 1849 0 0 ■32A y. j 0 17 .14 ■2027 0 0 .3427 1 JR .14 .2063 0 0 .3463 i 19 07 0 0 .37 �. 20 . 14 .2253 0 0 .3653 1 .14 .2444 0 0 .3044 23 .21 .3057 0 0 .5157 r •'` 4 .21 .3478 0 0 .557E3 !' S 2 37 0 58 t ,. . -. 7 .41 .4866 0 0 .876 29. 1. 17 1.0136 0 0 2.256 30 1.92 1,644 0 0 :5■564 _ ti,,* {:;:. .';:•° x:�;'.. a; • 2.134 0 0 - _ �:':" I •� 5 . 1 .196 0 0 s 06 � M1 - - - �� - �� �. F''�'�;`j L {�yy'k-{�fi_t._ •s ' ''► I 36 .21 1.832 0 0 2.1042 F#'•. 37 ■ 1 1.791 0 0 2.001 ', ;' <* ,•_ } .21 1.468 0 0 78 :far-, r 4 i. + :y. 5 M * V 41 /if}: k' ,.l':,~ .'},1;�513y •ITi Tl• -148 r.r �i-ti -J • WE3461 0 0 .9861 _ .*,'t\ -' •y'tis'F*.', ..r - 4 . L ,}C`'- 'V1L5 4 • Y .79$ 0 0 96 ■ f'r . ,i_ ' ;'.'i■ 4 , - ii,.. i 662 IL _ '46 .f 4 .5854 0 0 .7254 r /. 0 0 0 .6505 , ' { 4 4-416 0 0 .5562 44 3: 2048 Jam► 0 /^y .. 07. 54 .07 T .2444 .. 0 0 V 3144 .` '• t .*�_. r :.�' - a 56 ■07 07 0 io 77 ' 57, .07 .2025 0 0 .2725 0 3 r i Li PROJECT WHITEB P H 11 'r f,.. }jL�rti'tY:iit�''F}a. DATE 7/28/V3 ' Jr'k4'� DETENTION AREA DRAINAGE AREAS 1A 2A f� �. •{''`'�''w'��ti'ti'*'• STORM PERIOD 2 YEAR 8TORN 1 T LEVEL. FONT? AREA -SF 5000 MAXDCPTM -FT `f. 2ND LEVEL POND AREA-SF 5800 HAX DEPTH -PT f! 3RD LEVEL POND AREA -SF 6600 PIPE DIAMETER .4 PIPE L.ENGTH 50 r"- SLOPE 5E--03 J a' MANNING COEFFICIENT .013 ; ENTRANCE COEFFICIENT {K.); .5 COEFFICIENT OF DISCHARGE M i ` ANSWER FILE NAME.- P D-2 I INPUT FILE NAPIEj 1' PIA+A- REVISED INFLOW INFLOW OW TIME �'-+VALUE M1% I A 4 h1 t VALUE A 12 01 ° Y ■ r - - ,lip'j�,f s LLt;i 0 .24 5 5. .01 � '.4.86 7 .24 342 .02 42 L 1,��� •'4;,l,ti it`'��.■':i. .J 4 428.4 .02 1 7 48 d. + 4 r 4.24 514.8 ■0 30,43_ 01■200001 r 05 4' .7860 .24 687.6 .�� 70.8 66 .24 774.000140IL .09 �01 7(3 90 1 13' ■ #1" i �' ' ti ' 339.02 7•3 1 2 1. . 1 8 9.0 102 31389.t ' I 11 1497. .21 482,44 ' 1 Q 1603.6 .21 556.85 ,`. 1{_' 1713. .23 634.69 R 'F .3 �. 181. .24 719.26 , '`'+ kT 1+y_ r 7 [ 1',l 4 2120.4 .31 919,, " 144 .54 2314.e 3 150 4•5 r5f9e 'i -7 .�t�.__ } 15 , � 1 166. 8 G. rt a 16 r"S 1. 16 045.6 J�-�`� 1470.35 � Y � 5 �/{/ I �fy 1 168 .02 3618 .71 1686.55 +t, 174 3. 16 r'. 4550. 2010.72 180 1.�� 4.99 6017.4 50J� � 4 r r�y , li; .4- 186 6.53 E3091 2. f33182.5a �7 ■@ ' ' '' 997. 0001 � `y � f #Wr.R�■�f 198 1.56 1100818 .75036.14 t f 10 .5 4 11696.4 2.2 68:38.3 216 1 2085 *, �. .54 t 1. 9 821 .0 226 12279.E 1.66 8837.62 t om, 240 541�.�7 4 1«4 7 9401.0�7' 12666.4 r46 a544 12862.a 1. 14 10326.53 Iti3 25; t 43 13037.4 1.01 10715.28 f+" t 258 _ "#[ 64 13168.8 t85 11,049.09 T. ...a 13276.8 #74 11334.56 �. 270 13384.8 .66 11586.91 {{"` 276 .3 13492.8 Q 11011.46 282 13600.2 .51 1200Ek74 280 .3 13708.8 .46 294 ` 12346.34 00 13924.8 .42 15 a L 14121 ' . 19 141 1 k (3 12 791#V9 318 =.: 1 I' t r 5•k . s�7y6 14166 16 a3 12917.17 tl;L YJi 1 i.} 324 .06 - 14107.6 8 13027.32 336 #F .06 14 8 0. .21 13203,87 3/1214274 18 13347,18 r354 .06 14295.6 . 17 13410.3 0 .06 14317.2 14 13465.41 lr. ft# : �}/+ '•{•4[- �_. ,''. x{SY 'i}}�� i *�}# +i 7* `k3 {ter`,:" ■ ; = 4 , `:��'* r. f3f+L .L',ry x44 i' f*�.? "i3ti*{lffh':_'.,iSY.- -' .tr *% • kr��' � _ i • r?i``. = } ."+F: .t - - 4' * _,�}.5*iyc y .r+'k41 ' IQ. i;�i4'i.; } a .�■ +• r ,ti f+"' - , .' 5 h �:+7:•.Y•x{,,-.I"�i'I,':�' 01 5 y_'. f; x]�,ti.': �� ++t.=,# . + ?! •' +[ ! {5 `F,•34 [ 4 ' ".!,{�.' `�',.•`'* ,.y.kt'•,".1'!'Fi'. _•j=•' x' ll .'�41 ti•C 'ft� ',}tY,.i'{(f,', {�[[��##�#', { F F' LL ' *� ,i'R•. r';Y*.'f t•`T• + Tkw�. 1 # [ 't,�+� l* y 1 LL j` P R O {, R J T -�' WHITEBI R }A 11 r i DATE 7813 i x Y DETENTION AREA DRAINAGE AREAS IA 2A STORM PERIOD : 2 YEAR STORM F,wt.ri•5lyrwi��a.�4�.�r-.-ter+-+.f rs r+•+.�#r+.�wf7`rM#V+��.�•j•.rr�fr - - i' PCIND POND i REY Iy1 ED +}yry`y /}yy 1+y 1�y1}}+�ylRr 1�{}�� t1E1Lyy�7 T •4 T I I*�E 4.-/1 O 4 1 A�i E Lf 4--�5 1 1 4 MIN U FT FT i 6 1 166.7 l • J3 2 4 252.74 .y��y�zf � 33�'.B': 7 .8 .83 /� + 0, 8 . 8{7 4 2' r,- 8 54 55 .�2 1 1.33 ' 616 tS .E 66 672.31 .14 �. 1.49 8 �7--'yy 6/1�.3�6 { 1,58 # CC777 8 9 7-7 T 1� 50 6 1 1.67 107.1 980.E 1.75 108 10i5. 1 �048.75 .2 1.75 114 r, 1.8 � 120 1 0 .34 .24 .76 1 12 �� #1 E32 2 1321135.59 .rJ sp 1201 28=s' L■7 1277.75 144 4 _9 J 01 +,�F 150 1342.9 r1 2.03 156 1413.7E �J 1575.25 .35 ■ 16 168 1931.45 r 43 .2 74 2539. 8 .57 .36 180 3 8 '_* + 15- 11 .71 J 186 490 .4� 1 t i fJ., i f 1.31 r'#"F 5944-03 3.51 192 1 r 196 5972.66 324` 3.22. 5456.55 ' 10 4958.1 1 16 4327.17 1.01 2.33 /, 222 2.44 3072.93 .65 40 2774.,03 T r 37 7 .59 r #' 26 •j 4 �.3 _ r 25 3r. ■ / .49 ' 1942.24 ■45 2.22 6 .18 y ` 1681.3 .38 .15 -� 2.@ .34 83 a •.•-,i f2.03 .3 3 1470.46 14 4.51 3P 2.03 a (�y ] .31 1 312 3i7. .2 �t YJl r 1.93 3 i8 1246.83 t 7 28 24 1.7 3 1096. 1 .24 .rr� 336 1026.93 .22� 1 75 } ��rJi 1■67 974 + . .81 . 926.,62 346 805.24 1.61 r i 1.64 360 851.79E 1. xDRAINAGE AREA IA +- DRAINAGE AREA 2 PROPOSED CONDITIONS I 193 "EAR 2 STORM t - k F ' CiFF S!*T f TOTAL _ t 0 0 0 .13 � ( � _4 } .24 4 .13 . 1 ■ 24 . 13 0 L ii 1 21 t Q .1 a •i.7 i .}1# .f 24 e , 13 ■ 4 9 . 1 3 . 1 1 0 0 2 # ] 13 0 + 1i .13 i 0 24 0 ` ,2 13 t9 0 14 . X 9 15 . 17 .i l t 16 . 19 � 1 1 17 tfI 0 0 " 18 . 19 ,11 0 0 0 -, . 19 p . 3� 0 - 21 �7 . 1 0 0 ■0 1 �2 19 22 .45 ... -14 ■Y32 25 . .22 V) 0 .5# ;� , fT 3. 0 1. 16 t7 .51 .65 0 •' {+ 8 .03 1.19 0 ' 3.16 5 T 1.51 0 0 4.99 3.02 53 31 3.94 2.59 0 0 6.ry� , - 0 •YJ 2 3. .76 , y_ 3 1.02 # 56 0 6 y 7 4. t-.rF 0 ■ k T i 3 .22 sr E _ # 3 .3r .22 � # f f 4 ' 7 ,2 0 ■ '. .54 y 0 .54 4 # 11 i1 .4 _ 42 : 43 . 19 13 1 1 � 4 r {1 7 0 r s r i 0 0 ■ # 4 1 0 „ 49 ■ 19 #1 0 .3 50 19 it 0 3 . 19 .11 0 0 0 19 53 .06 0 �J 0 .Ql6 0 0 lei A 0 57 606 0 ,0? `5 .o0 ■0 i .06 ,C� 06 }{ 0 06 a ,. ) � PR#0 CLIENT - WHITE-BIRCH II DATE - 7/27/93 | ) i C0NDITI0N - EXISTING C0NDITI0NS - DRAINAGE AREA 1 | FILE NAME - Wf"- - pERI0D STORM 10 YEARS - � ! TIME. FL0W, TIME, FL0W. ' H0URS CF8 HOURS CFS 9 . 066769626 12 7. �8 9. 1 . 23 12. 1 4. 35 9. 2 . 23 12. 2 1 . 71 9. 3 . 23 12. 3 1 . 01 9. 4 ^ 23 12. 4 . 7 9. 5 . 23 12. 5 . 7 9. 6 . 23 12. 6 . 7 9. 7 . 23 12. 7 . 7 9. 8 . 23 12. 8 " 7 9. 9 . 23 12. 9 . 7 10 . 23 13 . 7 47 | 10. 1 . 31 1311 _ / 10. 2 . 31 13. 2 .31 13 �� 31 ' 1 .0 3 . 31 ^ ^ | � 10, 4 . 31 13^ 4 ^31 | 13. 5 . 31 / 10. 6 . 31 13. 6 .31 ! 10, 7 131 13^ 7 131 ! ` 10. 8 . 31 13.8 .31 � | ^vr' 10. 9 . 31 13. 9 . 31 . / 11 . 3.1. 14 .31 11 . 1 . 47 14. 1 . 23 11 . 2 . 7 14.2 . 16 11 . 3 . 7 14. 3 . 16 11 . 4 . 7 14. 4 . 16 11 . 5 . 85 14. 5 . 16 11 . 6 1 . 32 14.6 . 16 11 . 7 2. 48 14^ 7 ~ 16 i 11 . B 3. 65 14.8 . 16 11 . 9 5. 9B 14. 9 . 16 DIRECT RUN0FF - . 77 IN(�HE8 AREA IN ACRES F0R TIME SEGMENT 1 = 4^ 3 | / AREA IN ACRES FOR TIME SEGMENT 2 = 4. 3 | / i ' i l | i | ' ! ` ' l ' ` ` \ | PR#0 CLIENT - WHITEBIRCH II DATE - 7/27/93 CONDITION - EXISTING C0NDITI0NS - DRAINAGE AREA 2 FILE NAME - WE2-10 pERI0D 5TDRM - 10 YEARS TIME, FL0W, TIME, FL0W. H0URS CFS HOURS CFS q . 08983953 12 9. B2 i 9. 1 . 33 12. 1 5. 82 12. 2 2. 33 ! | 9^ 3 . 33 12. 3 1 . 33 9. 4 . 33 12. 4 . 93 9. 5 . 33 12. 5 . 83 12, 6 . 83 9. 7 . 33 12. 7 . 83 9. 8 . 33 12.8 919 , 33 12. 9 183 | 10 33 13 ^ i 10^ 1 . 33 13. 1 . 67 | 10. 2 . 5 13.2 .5 / 10. �3, . 5 13. 3 . 5 10. 4 . 5 13. 4 . 5 ' 10. 5 . 5 13. 5 . 5 10. 6 ' 5 131.6 . 5 10. 7 . 5 13. 7 . 5 10. 8 . 5 13. 8 . 5 10. . 5 11 . 5 14 . 5 11 . 1 . 67 14. 1 . 33 11 . 2 . 83 14. 2 . 17 11 . 3 . 8� 14. 3 . 17 ' 11 . 4 . 83 14.4 . 17 11 . 5 1 . 16 14. 5 . 17 ` 11 . 6 1 . 83 14. 6 . 17 | 11 . 7 3. 33 14. 7 . 17 , 11 . 8 4. 99 14.B . 17 8. 15 14, 9 . 17 ! � DIRECT RUNOFF - 1 . 65 INCHES ' AREA IN ACRES FOR TIME SEGMENT 1 = 2. 7 | ! AREA IN ACRES FOR TIME SEGMENT 2 = 2. 7 \ | ! � | ! / _ i | ' | ' PR#0 CLIENT - WHITEBIRCH II DATE - 7/28/93 C0NDITI0N - pR0P0SED CDNDITI0NS - DRAINAGE AREA 1 FILE NAME - WP1-10 pERI0D ST0RM . - 10 YEARS TIME, FL0W° TIME, FL0W, H0URB CFS H0URS CFS 9 . 083 48724 12 4. 29 12. 1 1 . 29 9~ 2 . 12 12. 2 . 81 9. 3 . 12 12. 3 . 46 q, 4 , 12 12^ 4 ~ 46 ] 9,5 . 12 12^ 5 ^ 46 1 9. 6 . 12 12. 6 . 46 9, 7 , 12 12^ 7 ^ 46 i 9. 8 . 12 12.8 . 46 � 919 ^ 12 12, 9 ,,46 ! 10 . 12 13 . 46 � / 10. 1 . 23 13. 1 . 23 10. 2 . 23 13.2 . 23 10. 3 . 23 1�. 3 . 23 10. 4 . 23 13. 4 . 23 10. 5 . 23 13. 5 . 23 - 10. 6 . 2� 13. 6 . 23 ^ 13 7 23 10. � . 23 ^ 10. 8 . 23 13.8 . 23 10. 9 . 23 13. 9 . 23 11 . 23 14 . 2�3 11 . 1 . 46 14. 1 . 12 11 . 2 . 46 14. 2 . 12 11 3 . 46 14, 3 , 12 i ^ 14 4 12 ! 11 . 4 . 46 ^ ^ � 11 5 58 14. 5 . 12 ^ ^ | 11 , 6 1 ~ 16 14^ 6 ^ 12 | 11 7 2 2 14 7 . 12 ' ^ ^ ^ i 11 ^ q 2. 55 14. 8 . 12 ` ' 11 . 9 4. 99 14. 9 . 12 DIRECT RUN0FF - 1 . 15 INCHES ! AREA IN ACRES FOR TIME SEGMENT 1 / ! | ' ` � | ` / PR#0 CLIE]�T - WHITEBIRCH IT DATE - 7/28/93 C0NDITI01\1 - PROPOSED C0NDITI0NS - DRAINAGE AREA I FILE NAME - WP1A-10 . PERIOD ST0RM - 10 YEARS TIME, FL0W, TIME, FL0W, ' H0URS CFS HOURS CFS 9 . 15205164 12 7. 6 9. 1 ' 29 12. 1 2. 34 9. 2 , 29 12. 2 1 . 46 9. 3 . 29 12. 3 . 73 9. 4 . 29 12.4 . 73 12. 5 . 73 9. 6 . 29 12. 6 . 73 9. 7 . 29 12. 7 . 73 9. 8 . 29 12. 8 . 73 9. 9 . 29 12. 9 . 73 10 . 29 13 . 73 10. 1 . 44 11-3. 1 . 44 10. 2 . 44 1�5. 2 ' . 44 | ' � 10. 3 . 44 13. 3 . 44 10. 4 . 44 13. 4 . 44 . 44 13. 5 . 44 10. 6 . 44 13. 6 . 44 10. 7 . 44 13. 7 . 44 10. 8 . 44 13.8 .44 10. 9 . 44 13~ 9 . 44 11 . 4 ' 44 11 . 1 . 73 14. 1 . 15 11 . 2 . 73 14. 2 11 . 3 . 73 14. 3 . 15 11 . 4 . 73 14. 4 . 15 11 . 5 1 . 17 14. 5 . 15 11 . 6 1 . 9 14.6 . 15 11 . 7 3. 8 14. 7 . 15 11 . 8 4. 53 14.8 . 15 11 . 9 9. 06 14. 9 . 15 nI RE"T RUNOFF - 1 . 45 INCHES AREA IN ACRES FOR TIME SEGMENT 1 = 5. 2 | ' _ | , - ' ) pR#0 ' CLIENT - WHITEBIRCH II ' DATE C0NDITI01 - PR0P09ED C0NDITI0NS - DRAINAGE AREA 2 FILE NAME - WP2-10 ` PERI0D ST0RM - 10 YEARS TIME, I-LOW TIME, FL0W, H0UIRS CFS H00RS CF8 9 . 047823669 12 5 . 25 9 3. 09 9. 2 . 15 12. 2 1 ^ 23 9~ 3 ^ 15 12, 3 . 77 9. 4 . 15 12. 4 . 46 9. 5 . 15 12. 5 . 46 9. 6 . 15 12. 6 . 46 9. 7 . 15 12. 7 . 46 9. 8 . 15 12. 8 . 46 9. 9 . 15 12. 9 . 46 10 . 15 1.3 . 46 10. 1 . 15 13. 1 � 1.0. 2 . 31 1 '. Z. .31 10. 3 . 31 13. 3 . 31 10. 4 . 31 13.4 . 31 10. 6 . 31 13.6 ^31 | 10. 7 . 31 13. 7 " 31 | 10. 8 . 31 13.8 .31 10. 9 . 31 13. 9 . 31 11 14 .31 11 . 1 . 31 14. 1 . 15 11 . 2 . 46 14. 2 . 15 11 . 73 . 46 14. 3 . 15 ' 11 . 4 . 46 14. 4 . 15 11 . 5 . 62 14. 5 . 15 11 ^ 6 . 93 14. 6 . 15 11 . 7 1 . 85 14. 7 . 15 11 . 8 2. 62 14.8 ^ 15 | � 11 ^ 9 4. 32 14. 9 . 15 DIRECT RUN0FF - 1 . 53 INCHES i � AREA IN ACRES FOR TIME SEGMENT 1 = 1 . 55 . AREA IN ACRES FOR TIME SEGMENT 2 = 1 .55 | | . � � ! ! ' ! | ! ' | / ' ` PR#0 CLIENT - WHITEDIRCH II DATE - 7/28/93 CONDITION - PR0p0SED C0NDITI0NS - DRAINAGE AREA 2A FILE NAME - WP2A-10 ' PERIOD STORM - 10 YEARS TIME, FL0W. TIME, FLOW, H0URS CFS HOURS CFS 9 . 097865598 12 5 ~ 11 9. 1 . 21 12. 1 1 . 49 9. 2 ~ 21 12. 2 1 . 06 9.3 . 21 12. 3 . 43 9. 4 .43 . 9. 5 . 21 12. 5 . 43 9. 6 . 21 12. 6 . 4.3 9.7 . 21 12. 7 . 43 9. 8 . 21 12.8 . 4,3 9^ 9 . 21 12. 9 . 43 10 . 21 13 .4�3 10. 1 . 21 13. 1 . 21 10. 2 . 21 1��.2 .21 ) | 10. � . 21 13. 3 . 21 10. 4 . 21 1�5. 4 . 21 10^ 5 . 21 13. 5 . 21 13 6 -21.10. 6 . 21 . .�2 13. 7 . 21 ' 7 . 21 10 ^ � | 10^ 8 ^ 21 8 . 21 10. 9 . 21 1��. 9 . 21 11 . 21 14 . 21 11 ^ 1 43 J. 0 | ^ | 11 . 2 , 43 14^ 2 0 11 . 3 . 43 14. 3 0 11 , 4 . 43 14^ 4 0 \ | 11 . 5 . 64 14. 5 0 28 14. 6 0 116 1 . ` \ . ! 11^ 7 2. 34 14. 7 0 ` 1 11 . 8 2. 98 ' 14. 8 0 / 11 . 9 5 . 96 14. 9 0 DIRECT RUNOFF - 2. 11 IN(]HES AREA IN ACRES FOR TIME SEGMENT 1 = 2. 3 � / ! | | - ! i -E AREA IA + AREA 2A PROD DRA f NAGIr. PROPOSED U)NDITIONS DR WHITER-IRCH 11 % 10 YEAR STORM OFFSET TOTAL WP I A-10 0 L= 9 2'3 lo 9 9 d 13 14 15 ./14 421 0 A 4 .21 6�3 .65 17 .44 1 0 .65 19 0 6`5 0 2 0 .44 0 .65 0 .67 vi 2 .444 if 13 0 73 0 J - 16 73 t .73 .43 0 0 0 1.37 2,6 .73 .64 0 217 1. 17 1.28 0 A 0 2,?10 -3 4 ..e 1.9 0 6.7 2V 3.8 2.98 30 4.53 5,176 0 0 10.49 31 9.06 5.11 0 0 14.17 0 9.09 32 7.6 1 0 33 2.34 1.06 0 0 34 1.46 .1,43 0 0 1.89 0 0 1.16 35 .73 .43 0 1.16 0- 0 1.16 37 .73 .43 0 1.16 36 .73 .43 39 .73 .43 00 0 0 1. 16 0 1 40 .73 .43 0 0 t. 16 .43 14 .94 0 42 .73 0 0 0 .65 -43 .44 65 44 .44 0 0 4.65 45 .44 4 0 0 0 46 .44 65 47 .44 "21 0. 0 . .65 AS 444 .65 49 .44 0 50 .44 .21 0 0 .65 51 .44 .21 0 0 �65 52 .44 0 0 0 .44 0 0 53 .15 0 15 54 .15 0 0 . 15. 0 0 . 15 55 .15 0 56 .15 0 0 0 . 57 �15 0 010 0 15 .15 58 .15 0 0 0 59 .15 CA 0 .15 0 610 .15 4 ` .►.:.Icy ri -.....r --•-,,.-r.t.,,J. :�. PROJECT - WHITEBIRCH 11 DATE 7 8 93 rfJ r DETENTION AREA }" ARAINA E •AREAS 1A $A a _ STORM PERIOD 10 YEAR STORM I T t-EVE . POND AREA "rti.,' 5000 MAX DEPTH --FT 1 h 2ND LEVEL POND AREA-SF 5600 MAX DEPTH D LEVEU POND AREA --BF 6600 1 PIPE DIAMETER I PIPE LENGTH 50 SLOPE 5E--03 MANNING COEFFICIF14T ■013 ENTRANCE COEFFICIENT 00' , COEFFICIENT OF DISCHARGE ( ): ,65 ,i ANSWER FILE NAME; INPUT FILE NAME: 14PiA+2A-10 REVISED I NFI-Qw INFLOW OUTFLOW W c�F�3T FL.�:�Ir) ' VALUE ACCUM TIME �.�--tJAI�I�E ACCUM 0 F MIN CFS C U FT CiF �l1 FT ' .01 6 1 .21 1 .01 i8 .5 165.6 .01 ■ 4 .5 45.6 .02 �.81 30 t 5 525.6 ■05 17. 6 :3 .5 705.6 i 956 [] .Q1 '#a4 ■ 885 r i 1 8 1■ ' E3 5 i 1245.6 .21 206. 0 *5 14 5. - /24 8a■07 -' .5 1605.6 .31307.11 5 'T1785.f� .35 504.76 -- .65 72 . 172r6 .39 'J3.]8,1gyp.. 84 .65 �26.690 .65 2460.6 .4� f/��3.7 7 .46 .06 - 96 5 2694.6 .49 � 1113 1292.5 10 .65 2926.6 .51 108 5 3162.6 1480.86 ; 3396.6 .59 1i 82.7 114 ■c 5 1 20 ,.]�Ci i 6 .61 1 C37 C7 126 .65 3E364.6 .61 1 i' ■Q� � 1 .87 413e.2 ,64 34�2. f 38 1. 16 4503.6 a 71 SCE .4 144 1.'16 4921.2 .79 2856.66 150 1.16 338.8 3161.49 15 i. 7 5 7c?4.2 .90 3500.3 6 162 .45 6481 r 8 i.17 388'7.i 168 4.24 7686 1.5 4377.9 174 6.78 9669.E 1.97 5013.61 iC7 i4r 7 1721# 41,15 p �0■02 4 21403.8 }, 6.72 98 3,4 3652 4.91 10571..26 r- 04 1,689 24604.2 4.75 1. 310. 1 }� 16 1.16 '_557VI-6 4q22 15542..94 1.1264063. 18366.11 228 234 1.16 26923.6 3.3 1 19613.17 -20752.9 27241.2 1.16 240 J- : .• # 1.16 ,TSB..94 28036.0 2.#'74 1'�87`46 S3252 T ' 58 t 6323 2,14 k 1 2 855 f ■ 24261'r o - , 1 87 1. 1 ..-. 491 1'.5 ► _ }�4 270 .65 5539■38 76 .65 905 1 a 26110.56 -. 288 .65 29493 1.35 +. 66 1.68 94 .65 977 1. 083.9 7 .65 9961 1.11 27504.25 �. / 5 301 5 1.01 70B6. y 0628229.94 �y 312 .44 30391.2 .09 "-; .15 .3f497/ + 74 855. 3 . 30551.4 :66 87 7.63 330 .15 S0605.4 54 81793/ 26 - 33 .15 ;.30659.r4 .44 ����#75 ' . 34 .15 30713.4 ,,-4 93/.� .'7 � r5 30767.4 .38 t9464,25 , r"+ 3�' # .15 30821.4 .33 29589,73�j ,f L9 f 03.G3 ` EaO .15 30875 r 4 a 3 dka .aF,,..`.��Fe' _Y,' f Yam:• {.' } rl�h1 '`SiF -.- !,ti' .y5_' i+ .4 {1�3' .1 _.'. 3 _- •+ - - �{.S {`�.-xE]`t�+C _ �{•hr{L. .3,'.-r�•'4.rt• - .. • --Y+rr-�''}4 ,4, 1'Yh� t' ��}�� +r-'.�;`*;•+I f.� -. t :.lr•..�_•'• - ' h . knd ��ri,�, ', - k_'134r#.► .�F#. -__rL-, � r - -;'t-'�{.'}. 1,y ifs r{*.. '� �:•a.'4•' r - , �tF'.Y I•i '�` ,,.+ , - r +.T * 'i Tr ',_}- ; tF f - . ,t, - Y'{�* .tea. fir,�_ _ __ ;.' ? 7 .•i��'L `I i ar I -rT'q rr _ _ PO DATE 7 . 8 i i I)ETENTION AREA - DRA I NA EA AREAS IA a- 2A STORM 1 P8# I xD 10 YEAR STORM YREVISED POND POND CHANNEL x ` ,{. T 1 NE STORAGE DEPTH VELOCITY •1 i! U FT FT FPS - 6 i 0 0 12 8 1[ate J1645.39 0.7 55.3/+y� i jo �fy3 l/ 1 0 i 7/ •11.f 7 i L 3 36 662.57 . 14 1. !j � 42 804.04 .17 1.48 i x_ 1 .61 54 1038.8 .22 1.75 ; 60 1137.53 .24 1.76 it 1442.81 r 32 2.03 i 91 1581.6 .35 2.00 + i 1o8 1661.74 .37 2.12 I 1� 1 f 4 t1713.9 . 8 2. 15 15 F 120 2 r � 9 2, 126 1746.77 .39 15 :► i2 1795.93 .4 2.18 133 1718r2 .43 2. 144 2064.54 .47 2.24 ' 150 2177.31 .5 2.29 r 2 156 2293.9 .3�. 162 2594.64 .6 .38 ' 168 00.1 .76 2.44 174 4655.99 1.05 .51 ' 180 6856,136 1.48 Z.91 i i ` 192 12577.08 2.51 6.O 18 13180.74 2.61 6.25 ;'� 04 12293.99 24,49 6105 -' 210 11178.57 *31 5.73 16 100 7.06 2.12 5.37 , � { tt 2 0979.86 f. �+ ;r ' 8 8039.89 1.76 4.61 .N I-}f." 234 10.4 3 1.6 4.21 246 5869.34 1.33 3.49 L'{ 258 4771.23 l.i 2.72 -k ;r264 4295.35 1 . . 9• -'70 31379.,44 .91 2.4 r 76 r "? r 02 282 3140.44 .74 2.43 ` r 88 2871.33 .68 2.42 Ai 306 2308.73 .54 2.Z33 ;} 312 2161.26 .5 2.29 -21%, 18 197 .1 .45 2.22 ,wy ` 32 r` 1'77'.3 77 .�41 .1 . _ 30 1612.14 .37 2.12 336 34 1390.7 31 .03 349 1303.15 .29 2.01 54 1231.67 .27 1.9 60 1172.17 1.85 i , i d r',• J 77 F EE i `it'`'J11 { {, }. WHITEBIRCH II - PROPOSED CONDITIONS DRAINAGE AREA 2 + DETENTION AREA OUTFLOW 7/ 8793 10 YEAR T HRH +r,? 4 OFFSET r .i 2 .15 .01 0 0 t }--may 0 6 .15 .0913 0 0 .2,413 ' 7 .15 . 1227 0 0 .2727 e .15 .1829 0 0 .33 7 .15 2 o kJ1fJ f 5 7 + 10 .15 ■ 444 0 0 .3944 11 .15 .3057 0 0 .4557 12 . 15 .3476 0 0 .497 13 .31 .393 0 0 .703 14 .31 .4162 0 0 .7262 15 .31 .463 0 0 .773 ' 16 .31 .4866 0 0 .7966 96 r 17 1.31 .5105 0 Q) .8205 ;;,• 10 .31 .5359 0 0 .8459 19 ,31 .5054 0 0 ,8954 21 .31 .6106 0 0 .9206 2 .31 .6362 0 0 .9462 4 .46 .7925 0 0 1.252 5 .46 .9009 0 0 1.3 62 2.097 8 .. 1.85 1.558 0 0 3.408 -' 9 2,62 1.973 0 0 4.593 30 4.32 3.01690 0 7.3B9 _ �,.. ti# 1 5.25 4.145 0 ( 9.395 32 3.09 4.78 0 0 7.87 ' .33 1.23 4.91 0 0 6.14 - _: 34 .77 4.749 0 0 5.r519 r' `_yy 5 .46 4.496 0 0 4.956 r =1 .:• 7 .46 3.926 0 0 4.386 3B .46 3.615 0 0 4.075 ' r 40 .46 3;0 1 9', 0 0 3.479 5 �� 41 .46 2739 0 0 3.199 42 31 2,.455 0 0 2.765 2.45 fi`= 44. 31 1.QB0.3 0 I�yL j. { 45 46. .31 11681 0 0 �. ..991 r=, 47 .31' 1,492 0 0 1.80 - ,fig ; f 0 '.31 1.113 0 0 1.4 3 51 .31 1.0013 0 0 1.05 5 3 .15 .'739B 0 0 .8898 ;r; 54 .15 .662 0 0 .81 5 .15 .5359 0 0 .6B59 56 .15 .439 0 0 .569 7 .15 .4162+ 0 0 .5662 58 .15 .37 0 0 ■5 59 .15 .327 0 0 .477 i. • '.ar`': 0 .15 r 3035 0 0 .4535 s�,4 'S A. L f ' - Y 4 ( | | PR#0 � CLIENT - WHITEDIRCH II 7/ DATE - 27/9 3 i C0NDITI0N - EXISTING C0NDITI0NS - DRAINAGE AREA 1 | FILE NAME - WE1-1CIO . pERI0D ST0RM - 100 YEARS { ' ! � � { TIME" FL0W TIME, FL0W^ ^ H0URS C FS H0URS CFS � 9 . 1560B484 12 17 . 24 ` 12 1 ^ 10 16 . 54 . � 9. 2 . 54 12. 2 3. 99 9. 3 . 54 2. 36 9. 4 . 54 12. 4 1 . 63 9. 5 . 54 12. 5 1 . 63 ' 916 . 54 12, 6 12 7 9 7 . ^ ^ ^ 54 | 918 . 54 12. B 1 . 63 ' 9^ 9 . 54 12. 9 1 ^ 63 13 1 6,3 10 . 54 . 10. 1 . 73 13. 1 1 . 09 . 10 2 7� 13. 2 ^ 7� | ^ ^ | ` 13 3 73 ' 10. 3 . 73 . , ` ' 10, 4 . 73 13. 4 13 - 1015 . 5 7�73 . . ( � | 10. 6 . 73 13~ 6 . 73 10, 7 . 73 13^ 7 ^ 73 ' | \ '-` '. 10. 8 . 73 1318 . 73 . � 101; 9 , 73 13^ 9 ^ 73 | 11 . 73 �4 . 73 111 1 1 . 09 14. 1 . 54 | 11 . 2 1 .63 14. 2 .36 | 11 , 3 1 . 63 14. 3 . 36 ` ~ 4 ~11 4 1 63 14 36 ! ^ ^ ` / 11 . 5 2 . 14. 5 . 36 � � 11 . 6 3. 09 14. 6 .36 | 1 5 1 . 7 . 81 14. 7 . 36 11 8 8. 53 14.8 .36 | ~ | 1 149 361 . 9 13. 98 . . � ' | DIRECT RUNOFF - 1 . 8 INCHES / � . | ' AREA IN ACRES F0R TIME SEGMENT 1 = 4. 3 AREA IN ACRES FOR TIME SEGMENT 2 = 4. 3 | / . . !! ' ! � / . | | - ` PR#0 ` CLI ENT - WH ITEDI RCH 11 DATE - 7/27/93 C0NDI1-I0N - EXISTING C0NDITI0NS - DRAINAGE AREA 2 FILE NAME - WE2-100 PERI0D 8T0RM - 100 YEARS TIME, FL0W. TIME. FL-OW. H0URS CFS H0UR9 CFS 9 . 168�8942 12 18~ 44 9. 1 . 63 12. 1 10. 94 | 9. 2 . 63 12. 2 4. 30 9. 3 . 63 12. 3 2. 5 9~ 4 . 63 12. 4 1 . 56 9. 5 . 63 12. 5 1 . 56 9.6 . 63 12. 6 1 .56 9. 7 . 63 12. 7 1 . 56 ! | 9. B . 63 12. 8 1 . 56 9. 9 . 63 12. 9 1 . 56 / 10 . 6 13 1 . 56 idol 1 . 63 1311. 1 , 25 10. 2 . 94 13. 2 . 94 ' ' 10. 3 . 94 13. 3 . 94 10. 4 . 94 13. 4 .94 10. 5 . 94 13. 5 . 94 10. 6 . 94 13.6 ^94 | 10. 7 . 94 13. 7 . 94 . 10. 8 . 94 13.8 . 94 10. 9 . 94 13. 9 . 94 11 . 94 14 .94 11 . 1 1 . 25 14. 1 . 63 11 . 2 1 . 56 14. 2 . 31 11 . 3 1 . 56 14. 3 . 31 . 11 . 4 1 . 56 14. 4 . 31 11 ^ 5 2. 19 14. 5 . 31 11 . 6 3. 44 14^ 6 . 31 i 11 . 7 6. 25 14. 7 . 31 14, 8 11 . 9 15 . 32 14. 9 . 31 DIRECT RUN0FF - 3. 1 INCHES AREA IN ACRES FOR TIME 8EGMENT 1 = 2. 7 2 2. 7 AREA IN ACRES FOR TIME SEGMENT = - � 1 i / .. `\ PR#0 CLIENT - WHITEBIRCH II DATE - 7/28/93 C0NDITI0N - PROPOSED C0NDITI0NS - DRAINAGE AREA 1 FILE NAME - WP1-100 PERI0D STORM - 100 YEARS TIME, FL0W, TIME, FL0W. H0URS CFS 19A00RS CFS 9 . 173508264 l2 8. 92 9. 1 . 24 12. 1 2. 65 9. 2 , 24 12. 2 1 .69 9.3 . 24 12. 3 . 96 9. 4 . 24 12. 4 ' . 96 9. 5 . 24 12. 5 . 96 9. 6 . 24 12.6 . 96 9. 7 . 24 12. 7 . 96 9 8 24 12.8 ~96 | . . | 9. 9 . 24 12. 9 . 96 10 . 24 1�� . . 96 13. 1 . 48 10. 2 . 48 13. 2 . 48 10. 3 . 48 1�. �� . 48 ' 10. 4 . 48 ' 13.4 . 48 10. 5 . 48 1�. 5 . 48 10. 6 . 48 13. 6 . 48 10. 7 . 48 13. 7 , 48 10. 8 . 48 13. 8 . 48 | 10. 9 . 48 13. 9 . 48 11 . 48 14 .48 11 . 1 . 96 14. 1 . 24 11, 2 , q6 14`2 ^24 | 11 . 3 . 96 14. 3 . 24 . 14 4 96 ~ 4 . 24 11 ^ | ^ i 11 . 5 1 . 2 14. 5 ^ 24 11 . 6 2. 41 14. 6 . 24 11 . 7 4. 58 14. 7 . 24 11 . 8 5. 3 14, 8 , 24 | ~ | 11 . 9 10. 36 14. 9 . 24 � DIRECT RUN0FF - 2. 39 INCHES AREA IN ACRES FOR TIME SEGMENT 1 = 3. 6 � � � | � � / / ' ! ' ' ' ` PR#0 CLIENT - WHITEBIRCH II DATE - 7/28/9*3 C0NDITI0N - PR0P0SED C0NDITI0NS - DRAINAGE AREA 1A � ' FILE NAME - Wp1A-100 ! pERIOD ST0RM - 100 YEARS TIME, FL0W" TIME, FL0W. H0UIRS CFS H0URS CF8 9 . 295714224 12 14. 79 9. 1 . 574. 55 9. 2 . 57 12~ 2 2. 84 | | 9. 3 . 57 12. 3 1 . 42 9. 4 .57 12. 4 1 . 42 9. 5 . 57 12. 5 1 . 42 9. 6 . 57 12. 6 1 .42 9. 7 | / . . 57 12. 7 1 . 42 � 918 , 57 12~ 8 1 ^42 | ^ 9 9 ! ^ 57 12^ 9 ^ ' . 10 57 13 1 .42 | 10, 1 , 85 | . 2 . 85 13 10 . 2 . | - 10. 3 . 85 13. � . 85 / | ` 10. 4 . 85 13. 4 .85 10. 5 . 85 13. 5 . 85 | 10, 6 185 13. 6 . 85 \ 1 0. 7 °85 13. 7 . 95 10. 8 . 85 13.8 . 85 . 10. 9 . 85 13. 9 ^ 85 / ` � 11 . 85 14 . 85 11 . 1 1 . 42 14. 1 . 2B � 11 . 2 1 . 42 14. 2 . 28 i 11 . 3 1 . 42 14. 3 . 28 � 11 . 4 1 . 42 14. 4 . 28 � 11. 5 2. 27 14. 5 . 28 � 11 . 6 3. 7 14.& . 28 � 11 . 7 7. 39 14. 7 . 28 11 . 8 8. 81 14.8 . 28 � ! 11 . 9 17. 63 14. 9 DIRECT RUN0FF - 2. 82 INCHES � AREA IN ACRES FOR TIME SEGMENT 1 = 5. 2 ' � | | ) / i ! ' ' - � | ( ) . ' | |! ! CLIENT - WHITEBIRCH II DATE - 7/28/9�3 C0NDI1­I0N - PR0P0SED CONDITIONS - DRAINAGE AREA 2 FILE NAME - WP2-100 PERI01) 91"0RM - 100 YEARS TIME, FL0W, TIME. FL0W, HOURS CFS HOURS CFS 9 . 0915838889 12 10.04 9. 1 . 3 12. 1 5. 91 9. 2 . 3 12. 2 2. 38 9. 3 . 3 12. 3 1 . 48 9. 4 . 3 12. 4 . 89 9 5 . 3 12. � . 89 i . � 9. 6 . 3 12.6 .89 9.7 . 3 12. 7 . 89 9. 8 12. 8 .89 9. 9 . 3 12. 9 . 89 10 . 3 ' 13 � 10. 1 . 3 1311 . 59 . | 10. 2 . 59 13.2 . 59 . 59 13. 3 . 59 10. 4 . 59 13.4 . 59 10. 5 . 59 13. 5 ^ 59 10. 6 . 59 13.6 . 59 10. 7 . 59 13. 7 . 59 10. 8 . 59 13.8 . 59 10. 9 . 59 13. 9 . 59 11 . 59 l4 .59 11 . 1 . 59 14. 1 ^ 3 11 . 2 .89 14. 2 . 3 11 . 3 . 89 14. 3 . 3 . 11 . 4 . 89 14. 4 . 3 11 . 5 1 . 18 14. 5 ~ 3 11 . 6 1 . 77 14. 6 . 3 11 . 7 3. 55 14. 7 ^ 3 i 11 . 8 5. 02 14, 8 , 13 i 1. 119 8^ 27 14. 9 . 3 | | � DIRECT RUNOFF - 2. 93 INCHES � | AREA IN ACRES FOR TIME SEGMENT 1 = 1 . 55 ! 1 55 AREA IN ACRES FOR TIME SEGMENT 2 = . ! ' | ! | . � � ! | . . ! / / i pR#0 l CLIENT - WHITEBIRCH II | | DATE - 7/28/93 ` CONDITION - PR0P0SED C0NDITI0NS - DRAINAGE AREA 2A � ' FILE NAME - WP2A_100 i pERI0D STORM - 100 YEARS . - � ) TIME, FL0W, TIME° FL0W. H0URS CFS H0URB CFS 9 . 172076478 12 8. 98 9. 1 . 37 12. 1 2. 62 9. 2 . 37 12. 2 1 . 87 9. 3 . 37 12. 3 . 75 9, 4 ~ 37 12. 4 . 75 9. 5 . 37 12. 5 . 75 9. 6 . 37 12. 6 .75 9. 7 . 37 12. 7 . 75 9. 8 . 37 12.8 . 75 9. 9 . 37 12. 9 . 75 � 10 . 37 13 ^75 | | 10. 1 , 37 13. 1 . 37 � 10. 2 . 37 13.2 .37 ( � 10. 3 . 37 13. 3 10. 4 . 37 13.4 . 37 ' ' 10. 5 . 37 13. 5 . 37 '-� 10. 6 . 37 1 3^6 . � � 10. 7 . 37 13. 7 . �`7 ! 10. 8 . 37 13.8 .37 / 10. 9 . 37 13. 9 . 37 , 37 14 ^37 | 11. 1 . 75 14. 1 0 | . 75 14. 2 0 11 . 3 . 75 ' 14. 3 0 11 . 4 . 75 14. 4 0 ' 11 . 5 1 . 12 14, 5 0 i | 11 . 6 2. 24 14. 6 0 . 14 7 0 | 11. 7 4. 11 . / 11 . 8 5. 24 14. 8 0 | 11 , 9 10. 47 14^9 0 > | . _ DIRECT RUN0FF - 3. 71 INCHES � / AREA IN ACRES F0R TIME SEGMENT 1 = 2. 3 � | ` / � i 1 i ' | i i | ! / ' / ' PROO d DRAINAGE AREA M DRAINAGE AREA AWHITEBIRCH 11 PRI)POSED CONDITIONS 7/'28 93 100 YEAR STOR11 OFFSET 0 0 0 TOTAL C) C11 .37 0 C.) .91(1 7 37 7 `5 7 .37 94 15 dl 37 0- 0 L? 57 37 0 t-y 4 10 .57 . 37 0 .!5 7 .3 7 0 0 .57 .37 5 .37 (1) 1 22 .5 1195 -57 0 Cl 37 0 Cl .31 3 7 0 IJ7 0 0 1.22 7, .37 45 e5 7 1.6 I 4'd" .75 G 0 2. 17 4'' 75 G r 17 -5 1.42 .75 17 26 1.42 1 471 0 2.5-1 27 2.-2`7 2-4 ol of 4.51 28 3.7 4. 11 0 0 7.81 -1-19 7.39 5.24 0 0 I2.63 30 B.qj 10.47 0 19.2-0 31 17.63 8.98 0 0 2"6.61 32 1li.79 2.62 0 0- 17 41 33 4.55 1.87 ol 0 6.42 13 4 -2.8 4 175 0 0 -13.59 I.4 2, .75 0 0 2,17 3 6 1.42 75 0 c- 2.17 .4�', 75 0 C) if,1-7 3� 75 el 0. 2,17 -3c� 1 421 75 0 0 2. 17 4 0 1.411 75 10 0 2.17 41 1�42 .75 (11 0 2. 17 V, 0 1.22 .95 .37 .95 ..-J7 1.22 45 .95 .37 0 1.22 46 .25 .3-7 0 1 22 47 .85 37 0 0 1.22 ,48 .95 .37 0 0 1.2 4 .95 37 0 1.22 50 .05 .37 1 .22 51 .85 .37 0 0 1.22 52 e5 0 0 0 85 53 .20 0 0 0 .28 54 .28 0 Q) 0 28 55 20 0 0 .28 56 21 8 0 0 29 57 '.::'g 0 0 0 .28 58 .28 0 0 .213 59 .28 0 0 .28 60 .28 0 d PROJECT DATE 7/20/93 DETEN O TIN AREA DRAINAGE AREAS I C'AA 9-rC-iRl-l.PCR[(-)D 100 YEAR STORM GF 5000 HAX DEPTH -F1' I I ST LCVEI- PomD AREA .-..ND LEVEL POND AREA-SF `iGOO MAX DF-PTH 3RD LEVEL. P(.)(,JD AREA -SF 6600 PIPE DIAMETER I PIPE LENGTH 50 SLOPE 5E-03 NANNING COEFFICIE14T .013 ENTRANCE COEFFICIENT 00; COEFFICIENT QF DISCHARGE i ANSWER FILE NAME-. WPOND-100 NPUT FILE NAME: WP I A+2!A-I Oy 0 REV I SED I NFLOW 114FL(JW OUTFLOW OUTFLOW TIME Q--VALUE ACCUM VALUE ACCUM HIN CFS CU FT CFS CU FT 6 0 1 . 1 0 1-2 .37 0 18 4 302.4 .01 2.13 .9 .94 6140.B .08 tB.5 30 9lef ?79.2 . 17 62.96 1317.6 .28 144.26 36 .94 165 6 .39 266.06 42 .94 1994.4 .49 424.4 148 .94 2332.8 .59 617.38 54 .94 841.93 2671-2 .66. 60 .94 .7 679 . 66 .94 3009.6 1 IOE3 72 4 3348 .74 1351.40.9 .92 1632.23 C) 78 1.2'2' 37-36.8 722 4176 .93 1946. 7 1. E34 90-38 90 22 1.2 2. 4615.20001 9t3 1.04 2653.41 C) 5054.'40001 96 1.22 5493.60001 1109 3035.37 102 1.22 1.11 3431.46 1.22 5932.80001 - 108 6372.00001 1.14 3837.22 114 1.22 1.22 6811.20001 1.14 4247.717 120 1.17 4663-1 1.22 7250.4000L 132 1.6 7758.00001 1.22 5093.16 32 138 2. 17 8436.60001 1. 5551.04 144 2. 17 9217-80001 1.47 60 3.55 150 2.17 9999.00001 1.,62 6610.4, 156 2.54 10846.9 1.74 7215.29 162 4.51 12115.8 1,85 7660.91 2.56 8 161B 7.81 14333.4 654.25 174 12.63 18012.6 3.6 9763.01 180 19.20 23756.4 4.74 11265 06 6.61 32016.6 5.96 13195.05 1 2 192 17.41 39940.2 6.89 L5512.51 . 642 44229.6 7.17 19 8 46031-A 7.07 �Q4�44.le Q 204 3.59 31 -20607. 21 2. 17 4 7068.2001 6.,B5 (a 5:35.68 1 -47849,.4 6.6 25 26 2.1 7 222 2.17 40630.6 6.35 27a67.69 22a 2. 17 49411.0 6. 11 30110 11 E39 5.87 322(56.r92 234 2. 17 50193 5,p 63 34337.51 2,17 5R974.2 240 5.4 36324.53 246 2.17 51755.4 252 1.79 52468.2 5.17 3S2:27r.62 .26 530io 4.9 40040 258 1.22 264 1.22 53449.2 4.62 41754.12 1. 33 53888.4 4.34 4 66.63 22 270 44979.45. 54327.6 4.07 1.22 276 4628U.71 54766.8 3.,76 282 1.22 47589-79 55206 28e 1.22 294 1. 55645.2 3.17 48784.4 22 49EI77-06 2 56094.4 2.9 300 12 5 56896. 56523.6 2.63 508 306 .1.22 iTI2.35 51768.B2 Li 2 312 •B 52551.34 316 .28 57099.6 2 1 83 53239.19 324 .28 57200.14 53866.95 57301.2 1.66 330 28 1.43 54421.77 57402 336 420 342 .28. 57502.8 1.22 54B97 57603.6 1.01 55298.26 4 13 .53 38 .2 354 28 57704.4 02 55627.61 36 B 57805.2 .71 55903.76 0 .2 F L QL PROJECT WHITEBIR H 11 y, DATE 78'773 ]DETENTION AREA -- D A T JA E AREAS 1 2 STORM PERIOD 100 YEAR STORM -Ir + LL err++ +f - i.- `•,i`Y''-4,r.i ar.-l+,M.amtlr#A+wF +#iM+..-.w. .r.+.+..-++ .. +w" -rrW+ m - , .' CHANNEL- REVISED POND POND VELOCITY TIME STORAGE DEPTH :'. 4 1-11 N CU FT ET FPS F 6 0 0 �r{�� 7f}y I } 0 i. 33 24 622.3 .1 1, 1.64 30 r=1 # i+,.,B9. J 4 .3 26 ice (/T I 40 1570 r 35 ■YJ 54 1715. 30 2. 15 F 60 182 .�'7 + iS 6.5 1919.9 ./+ -'•2 - 72 1996.52 .45 2•2-26 ' -a 78 2104.57 .48 -■ r �# Y 1 Y '-F 2229.23 r+-r4 } f 2 90 2324.82 .53 2.32 { 6 2400.99 102 2458.23 r57 2.36 1 'T 34.78 .59 2.37 T` 120 2563.49 ■ 9 .37 f r{ r 3 f , 6 64.84 .62 2.38 138 2085.56 .67 r 4 } 2.43 V'Y50 3388.57 .79 2.43 .,. 44 156 3631,51 - ; 425,14.89 r _ 168 5679.15 i.25 .26 4.513 ;y't 174 8249.59 1.75 v,� a 7.61 _ -.....: 186 r 4 2 8.7 7 � 19 2442 7.69 t I B,5.4 4.71 9.13 98 0 25424.0 9 4.6 " _J 210 / F ; 16 22313.72 Y 2 07Y62.91 3.86 . 0 r•- +i 8 3.63 7.7 i 3f.`11 :46 15430-87Y 3 6.8€3 zri25214 40.58 .81 6.58 ,� $ � ; 121?69.72 2.6 6.24 = f 259 4 8 `' - ' 6411695.08 Y ,i3 105 1.77 2 5.53 S k 9F4 `' 5.16 ,. .., 276 s, F3 f34 .# 1.84 }+.79 jo 7616.21 1.60 .41 4.04 i? r3 294 6060.6 1.53 , '' 300 607.34 1..4 .6 _ ` { 06 5651.75 1.28 3.35 312 5127.38 1.16 2.9 2.55 2.42 244 336 p 2980.23 .71 1 342 2605.54 ■62 2.38 27-=- 348 2305:07 .54 2.33 {, }2 54 2076.79 +8 . 6 360 .44 - lam} t _ i WH i TED 1 R H 11 PROPOSED CONDITIONS -- DRAINAOE AREA DETENTION AREA OUTFLOW `- 7 8 93 100 YEAR STORM `• ()FF ET 0 0 0 0 TOTAL 1 } 0 0 0 2 .3 .01 0 0 .31 4 .3 r 0 7 7 0 0 7 5 .3 .1679 0 0 .4679 =F6 .3 .2836 0 0 .5036 .393 0 0 .693 9 .3 .5054 0 0 .f3854 t 11 .3 .7144 0 0 1.014 12 .3 .7398 0 0 1.039 13 .59 .8198 0 0 1.409 1 .59 .9276 0 0 1.517 15 .59 .9813 0 0 1.571 't 16 .59 1.035 0 16 1.625 C.�+ : 18 .59 1.113 0 0 1.703 19 •59 1. 14 0 0 1.73 LI'.p 1 .59 1.167 0 0 1.757 22 .59 1.22 0 0 1.81 23 .87 1.322 0 0 2.212 24 e9 1.#6 0 0 2,358 6 1. 18 1.735 0 0 2.915 t 3 " 27 1.77 1.851 0 0 3.621 { -y' 8 Z.55 2.556 0 0 6. 106 ` 30 8.27 4.741 0 0 1 .Z1 -,•-' , * 31 10.04 5.90 0 0 16.0 ' 32 5,91" 6.894 0 0 12.8 33 2.36 7.17 0 0 9.53 } -34 1.4a 7.069 0 0 8.54 9 _ # 35 .89 .854 0 0 7.744 37 .89 6.3 3 0 0 7.243 8 .89 6.108 0 0 6.998 39 .89 5 1369 0 0 6.759 a ,r 4 .89 5.634 0 0 6,524 LL T' 41 .89 5.404 0 0 6.294 4 .59 5.167 0 0 5,757 2, 44 .59 4.618 - 0 0 5.20B 45 .59 4.339 0 0 4.929 . y 4 .59 4.065 0 0 4.655 .T 47 .59 3.764 0 0 14.35�4 f'. 48 .59 3.464. 0 0 4.0514 •• 49 .59 3. 173 0 0 3.763 _ 50 .59 2.a95 00 3.485 ` r 51 .59 2.631 3 0 3.221 ► 52 .3 2.352 0 0 2.65`2 {Y 53 .3 1.995 0 0 2.295 5 .3 1.826 0 0 . 126 55 .3 1.661 .0 0 1.961 56 ■3 1.42 0 0 1.7 :. 57 .3 1.22 0 0 1.52 5B .3 1.008 0 0 1.30 ' - 59 .3 .8198 0 0 1.1 19 60 3 7144 0 0 1.014 r • � - - err.--^-�`....��..--T. ". . '--`' .. ..-.{* '. --ri .__.- ..., _ sir F 4�4 { I SECTION III EROSION 1 SEDIMENTATION CONTROL r SECTION III EROSION AND SEDIMENTATION CONTROL r Erosion and sedimentation will be controlled in the following manner: .s soon as the roadway ri ht�of-way is cleared of trees and all of the stumps are removed, a row of staked hale bakes will he placed at the bottom of the slope along the roadway and detention area* This form of erosion control is illustrated in Figure : Sedimentation Control. Detail. :. Crushed stone will be paced at the entrance of the roadway over the full width of -the cleared area for distance of 50 feet to a depth 'of 4 inches to provide erosion control - for the uphill grade into the project. When the drainage structures are installed in the roadway, the frames and grates will be mortared and set to finish grade 'Immediately. on many projects, the manholes and catch basins are left low and uncovered after installation and act as collectors of sediment from runoff. By setting the frames and grates to finish grade they g will be higher than the surrounding roadway until it is paved. This will prevent water and sediment from entering the drainage system . before the r adway is paved. Hay bales will be placed around r the catch basin inlets after the roadway is paved, and will remain in place until the shoulders and side slopes are stabilized with sufficient vegetation to prevent erosion. All slopes .-n construction areas throughout the site ill be seeded and mulched or brdroseeded) as soon as construction a4-n the area is completed, r r - 1 a V,481E.5 1 R A-X5 'fiat # GrROLIND AIl + e ax Lp'q X,5� ST-4KE5 E4CH BALE -7TA IL 3F.D11t , ,,.. NTAT10N CONTROL DL -------------------------- o sc.,-4 L E NOTE: + RAY BALES T BE ACED AND 37.4KED BEFORE Wol?l< - 3 TO BEGIN AND REV. I-WrIL 6Ll .5. .4 E STAZ31LIZED WITH LOAM AND ,SEED* A SIL7. 1V TRAPPED BY AI AY BAL 465 16 TO DE REMOVED. f FIGURE SEDIMENTATION CONTROL DETAIL