HomeMy WebLinkAbout2004-02-05 Stormwater Revisions 12/9/03 Transportation Land Development A Environmental V S e r v i c e s jj DEC, 9 101 Walnut Street Vanasse ffai�Qen. Brusthn, hic. P.O.Box 9151 W)111)I I AN[')(Jvw-t H-ANNIW,11 Mil ft gtqIpwri,MA 02471-9151 617 924 1770 PAX 617 924 2286 Memorandum To: North Andover Planning Board Date; November 26,2003 Town of North Andover Revised:December 9,2003 27 Charles Street North Andover,MA 01845 Project No.: 08354,00 From: Jon Stephenson,P.E. Re: Eaglewood Shops Retail Development Stormwater Management System Revisions Vartasse Hangen Brustlin,Inc. (VHB)has prepared this memorandum as w-vaddendum to the "Drainage and SLormwater Quality Report"issued September 2003,and revised October 2003 and the"Eaglewood Shops Retail Development Storntwater Mangernent System Revisions", dated November 26,2003. The addendum is being issued in response to comments from the Site Plan peer review consultant,MHF Engineering,and the Notice of Intent peer review consultant,Eggleston Environmental. In response to comments the following revisions to the site plan set have been made and additional information provided herein: ➢ The detention pond has been increased in size to provide more storage volume in order to reduce the 100-year storm event headwater elevation in the detention pond(HW(100)=127.6 and the top of the pond is at elevation 128.7). The Hydrocad analysis Sheets are attached to this memo. ➢ The increase in storage volume in the detention pond has resulted in an additional decrease in peak flows from the pond as seen in table 1 of the memorandum. ➢ Additional information has been provided on the Stormtech recharge chambers on sheet C- 13 of the revised Site Plan set. ➢ Information has been provided regarding the operation of the underdrain in the detention pond. > The pre and post development stormwater runoff volumes have been provided in table 2. > A summary of the first flush analysis has been clarified on sheet C-13 of the Site Plan Detail Sheets. Table 1:Peak Discharge Rates (efs) Design Point 1-Year 2-Year 10-Year 25-Year 100-Year DesiMi Point 1: Wetlands Existing 3.4 4.2 10.9 16.0 21.5 L Proposed 94-2.6 3.1 ....4075-9.5.....1 44-.8-12.9 1 24-,-5-16-8 \\\08354\d*cs\memos\inemo-08354,stormwaker rev 12 Date: November 24,2003 2 December 9,2003 Project No.: 08351.00 Table 2: Discharge Volumes (acre feet) Design Point 1-Year 2-Year 10-Year 25-Year 100-Year Design Point 1:Wetlands Existing 0.5 AF 0.65AF 1.49 AF 2.13 AF 2.82 AF Proposed 1.8 AF 1 1.98 AF 1 3.26 AF 1 4.12 AF 1 4.99 AF The updated proposed conditions hydrologic analysis can be found in Attachment B of the memo. \\\08354\does\memos\memo-Wa5d-stormtivaterrevl2 09 03.doc i Attachment A: Detention Pond Underdrain Calculations Mirafi 140N Fabic \\\0335a\does\memos\memo-O835t-stormsvater revl2_Ory_D3.doc ' Com'D Project: EA6LEV-k:-,OD Project# i-0'::� Location: kI, ANDc�U&k Sheet of Calculated by: 3'Ds Date: z f Checked by: Date: Title r IAA rr 1 I WO M LI f)� k T l rUGi U O DL'1 LN—FIot\J POMP L-t JDG2C)2AIvv - q5(& t'Y WAF1 0-I0N -Ff)RRIC FLow kA-q_ '[�-kp.&u _f ( -Fn8 C -�-- I35 L�,,j c,-,h c-)f W\) lit Qb2.AtY,) = i3 or otvnc a. or? Aw 2r 2, 33 25 (01PIL SuP-FAGL� AkC A = 21l Sr To-w- V0Ukrr, = OF 5Lvrp lo, ::716o r7 = Sly S32vAL 217 21� QD- 2, 3 m f w[&-s ro tv�Ai),j mkgr.forms.hu man res.tampufauons.pM5 Van asse Hangen Bi-ustlhr,Inc. I Technical Data jV1 j R,a F j 1 Engineered Solutions for an Innovative World product Mirafi® N-Series Nonwoven Polypropylene GeotextileS for Soil Separation, Filtration, and Protection Property/Test Method Units 140NL 140NC 140N 160N 170N 18ON 1100N 112ON 1160N MECHANICAL PROPERTIES Grab Tensile Strength ASTM D 4632 Strength @ Ultimate kN(Ibs) 0.40(90) 0,45(100) 0.53(120) 0.71(160) 0.80(180) 0.9(205) 1.11(250) 1.34(300) 1.69(380) Elongation 0 Ultimate % 50 60 50 50 50 50 50 50 50 Mullen Burst Strength kPa 1309 1550 1654 2239 2412 2766 3514 4134 6167 ASTM D 3786 (psi) (190) (225) (240) (325) (350) (400) (510) (600) (750) Trapezoidal Tear Strength kN OA 6 0.20 0.22 0.27 0.33 0.36 0.45 0.51 0.62 ASTM D 4355 (Ibs) (35) (45) (50) (60) (75) (80) (100) (115) (140) Puncture Strength kN 0.24 0.30 0.31 0.42 0.46 0.58 0.69 0.78 1.05 ASTM D 4833 (Ibs) (55) (65) (70) (95) (105) (130) (155) (175) (235) UV Resistance after 500 hrs. %strength 70 70 70 70 70 70 70 70 70 ASTM D 4355 HYDRAULIC PROPERTIES Apparent Opening Size(AOS) US Sieve 70 70 70 70 80 80 100 100 100 ASTM D 4751 mm 0.212 0,212 0.212 0,212 0.180 0.180 0.160 CIA60 OA60 Permittivity see, 2.0 1.9 1.8 1.4 1.4 1.2 1.0 0,8 0.7 ASTM D 4491 Flow Rate I/min/m2 6111 5698 5500 4477 4278 3866 3056 2648 2037 ASTM D 4491 (gal/min/ft2) (150) (140) (135) (110) (105) (95) (75) (65) (50) (! Packaging Roll Width m(ft) 3.8(12.5) 3.8(12.5) 3•8(12.5) 4.5(15.0) 4.5(15.0) 4.5(15.0) 4.5(16.0) 4.5(15.0) 4.5(15.0) 4.6(15,0) 4.5(15.0) 4.5(15.0) Rail Length m(ft) 109.7(36Q 109.7(360) 109.7(601 91.5{800) 91.5 PW 91.5(d00) 91.5(300) 91.5 @M 45.7(160) Est.Gross Weight kg(lbs) 63(138) 70(154) 76(167) 98(215) 1 OD(225) 122(270) 150(3M 179(393) 122(268) 75(165) 83(184) 91 (200) Area ml(yd2) 418(50D) 418(500) 418(500) 418(5W) 418(500) 418(5M 418(500) 418(500) 2W(260) 501(600) 501(600) 501(600) NOTE:All Mechanical Properties and Hydraulic Properties shown are Minimum Average Roll Values(MARV), Cut-off/Inceptor drain along a roadway or other critical structure French drain without pipe Liner protection within a landfill t ; i k,t�:��" �'�`w ' � � .r '`;. �}ram 'Q'•:.. ZS: �-_, ��,, t, �� u i � -s f. .Q;.C7/1:iY� it la •M O.J-- PAI7EMENT �- z. h�r r _ 1 MIRAFt N-SERIES >r�rsr`-`, „'•"�';9: �::. 'V. V• ;q. < L} r,s � •r `K a � ,: �{, w . {-y ,may` rt:...Wrr=t•�;v,..Q•;...,.• f 1.�� 5 Cf f 4.1fr. a,,[,Y}.�SI-Srr,�4j i�'E it V• -C. sfS `+J r .DRAINAGE LAYERo;:.. c•r� u l ti•.irM n.e.:�r.. 4�'_,`t ri!' ``��c;.z : ¢ i4AGGREGATE' p. q,o:c :o':•b. 4 1� LIN Rfr S O'•, V riQV,• -V. \ ' 'AGGREGAT `a sir S «S' w - t z'#Yis••a �` ,r.• •s`•r:ri�.5..',:n�,:•l�,{•.: ..,yl J.. �jPEv'RihF O.-R14�;)Ai;•�'.n'3�ui,r: ,"�N!!M`SIER.rI>aE1;4S=Irs,, _- t t�: - • N•• ,i; wr<.^hl.E'i.N] Z`.0 RAFI # �:� �! 3V PIPE 'i Fa7�. GEOTEXTILE�S Sai'S q � 1'•ja��Ja S'�rn; . Set a>E�w � .��t �t1��n� .r `��,� �� r,x,� n:,.' ��µ�`�- �{\�' _' `'�'f51i� SC`,i•.�. .'� ��'i2'i<��• q; 7 .i�`yty�;..'.s�a �s'1�r fS;,,;# w r -nr.74 }• n � rnrRra••nr� �; Y.�•:r >-rr,i^ S fir:,'. �-„_"s�MIRAFI..� (•e�S ��')`tt -5' �^•S �F ;. i,,. t� .~.,�,s� 4s 2�- SERIESF'; c .e• i c.:"fi.er e ? �,t t'` nr f •`MLi:•: ',c _ :��+t" v.75T ti�•.�W-'r t•, ''13:;,r�ei°..-f;}iv s3t.r-2��i"�qq✓��,,v. i't'•, r.� .'N r j. �.:•A•�v�.�i1,k� �,+,�' r ?�� ,�� r� � ��� � L.� ,:Yr -.r:'�`� 7•..' �'.�"�f�;�'� � 'lC {., 7 Y� �sl :r rl rnti,.✓-�,nrl,' S /i.� sA:� h < 4t7r�J" f L 4 ]T Er S„e+" `-ff wi•: i 3�� � + 5 y�tf 3 v +i;.: 5 + A" ;�� ,ps �?.9 t„�,t �. n^ r.-•. `Ln•,c�,�..:n ,,.,:..5 �F.:Va _,,:�.,nwa'�!', �',t., Fr-•� h-�:,::se y:;�.n r!' Corporate Office 365 South Holland Drive Jj Pendergrass,GA 30567 (888)795-0808;(706)693-2226 _ TC Mirafi Fax(706)693-4400 TC M€raf€Warranty:TO Mirafi warrants our products to be free from defects In material and workmanship when delivered to TC Miral's customers and that our products meats our pub- lished specifications.If a product Is found to be defective,and our customer gives notice to TC Mirafi before installing the product,TO Mirafi will roplace the product without charge to our customer or refund the purchase price at TC Mirafi's election.Replacing the product or obtaining a refund are the buyer's sole remedy for a breach and TC Mirafi will not be liable for any consequential damage attributed to a defective produet.THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER WARRANTIES,EXPRESS OR IMPLIED,INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION OF THE FACE HEREOF. POS-N8ERIES598 9 BOTTOM OF DETENTION BASIN LOAM 18" MIN. FILTER FABRIC OVERLAP PERFORATED PIPE 0 ° \\/i\\i' COMPACTED ♦/\ g:.o O°pO og a /�. COMMON FILL 011 °a: - 0 O q O °o o°. ; 2" WASHED .o.o : �/f STONE 0 p0 0.0 a . /. Notes: 1. UNDER DRAIN PIPE TO BE 4 Underdrain (UD) 3i02 N.T.S. Source: VHB REV LD_184 i Attachment B: HydroCAD Analysis \\\0$35-i\dots\memos\memo-0$35d-storm"ater rev 12_09_03.doc Proposed Conditions 1-, 2-1 10-, 25-, 100-Year Storm Events \\\03351\does\memos\memo-08353-slormn•aler ree12_09_03.doc I 8354-pr Type 11124-hr 1 YR Rainfall=2.90" Prepared by {enter your company name here} Page 1 HydroCADO 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking f Runoff Area=7.640 ac Runoff Depth=1.98" Flow Length=1,430' Tc=8.8 min CN=91 Runoff=15.92 cfs 1.259 of Subcatchment PR-1 B: PR-113 Proposed Retail Driveway/Lands Runoff Area=1.645 ac Runoff Depth=2.35" Tc=5.0 min CN=95 Runoff=4.47 cfs 0.322 of Subcatchment PR-1C: PR-1C Overland to Pond Runoff Area=1.290 ac Runoff Depth=0.80" Tc=5.0 min CN=73 Runoff=1.14 cfs 0.086 of Subcatchment PR-1D: PR-2 Overland to Wetland Runoff Area=1.170 ac Runoff Depth=0.75" Tc=5.0 rain CN=72 Runoff=0.95 cfs 0,073 of Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff Area=0.530 ac Runoff Depth=2.67" Tc=5.0 min CN=98 Runoff=1.54 cfs 0.118 of Reach 1 R: Design Point 1 Inflow=2.59 cfs 1.800 of Outflow=2.59 cfs 1.800 of Pond 1: Pond 1 Peak Elev=125.36' Storage=50,236 cf Inflow=22.25 cfs 1.785 of Outflow=2.41 cfs 1.727 of Total Runoff Area= 12.275 ac Runoff Volume T 1.858 of Average Runoff Depth = 1.82" 8354-pr Type/1/24-hr 1 YR Rainfal1=2.90" Prepared by (enter your company name here) Page 2 HydroCADO 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking for Site Runoff = 15.92 cfs @ 12.12 hrs, Volume= 1.259 af, Depth= 1.98" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type Ill 24-hr 1YR Rainfall=2.90" Area ac CN Description 0.130 98 Existing Bank Roof 0.720 61 >75% Grass cover, Good, HSG B 0.650 74 >75% Grass cover, Good, HSG C 0,590 74 Bank:>75% Grass cover, Good, HSG C 5.550 98 Parking, sidewalks 7.640 91 Weighted Average To Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.3 50 0.0240 0.2 Sheet Flow, Grass: Short n=0.150 P2= 3.10" 0.4 40 0.0500 1.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.8 450 0.0400 4.1 Shallow Concentrated Flow, Paved Kv=20.3 fps 1.3 890 0.0500 11.0 8.63 Circular Channel (pipe), Diam= 12.0" Area= 0.8 sf Perim= 3.1 I r=0.25' n=0.012 8.8 1,430 Total Subcatchment PR-1A: PR-1A Proposed Retail 1 and Parking for Site Hydrograph 7' ---- I 15.92cfs � I �-I--r-I---,.._I. ...1_.. y� 24 h I 15------ --;- _ r-;1YR-- 14_ --1--I ' a I 1 ; Rai fall 2.9E0`- - - Runoff Area=7.640 ac 11 I I I ! RnoffV lu - 259€ af--iQ_ u o ; - ff D--- t h'-�1I 9 o- y��-98 -- ! � E R - 0 iz Flo 1 I I 7= --- --;---- -- - -- w Lengfh�'1430'- MC 5= n1 f1 3 - I I i "1 - "I- 'i - ,- -1- 4- _ -- 1 _j. . _ ... CN=01 e I : E I I I I ` ....yT.'.R�..i. ,�j... ....,.. .1^..5�•1'^''ter �IT�....... '. . :1.... . .,pT'wr . 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 47 18 19 20 21 22 23 24 25 2fi 27 28 29 30 Time (hours) 8354-pr Type III 24-hr 1 YR Rainfall=2.90" Prepared by {enter your company name here} Page 3 H droCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Runoff = 4.47 cfs @ 12.07 hrs, Volume= 0.322 af, Depth= 2.35" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0,01 hrs Type III 24-hr 1 YR Rainfall=2.90" Area ac CN Description 0.270 98 Driveway 0.150 61 >75% Grass cover, Good, HSG B 0.523 98 Retail 2 Roof 0.702 98 Retail 3 Roof 1.645 95 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.0 Direct Entry, Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Hydrograph 4.47 cfs —Runoff Type III 24-hr 1 YR 4 Rainfall=2.90" Runoff Area=1 .645 ac Runoff Volume=0.32211-f 3 3 Runoff Depth=2,35" T6=5 0 m in V i =95 I I 1 - I Q' ....I....,...:I:... .. ..., :.I�SR>•1�'4�!^�I� �1 ..: .. 1 ..Tr.'ll��.'��!�!��R:rl..;. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 S 17 18 19 20 21 22 23 24 25 26 27 28 28 30 Time (hours) 8354-pr Type III 24-hr 1 YR Rainfall=2.90" Prepared by {enter your company name here} Page 4 HydroCADO 7.00 sln 001234 01986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff -- 1.14 cfs @ 12.08 hrs, Volume= 0.086 af, Depth= 0.80" Runoff by SCS TR-20 method, UH=SCS, Time Span=0,00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 1YR Rainfall=2.90" Area (ac) CN Description 0.380 74 >75% Grass cover, Good, HSG C 0.620 61 >75% Grass cover, Good, HSG B 0.290 98 Reserve Parking Area 1.290 73 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 C: PR-1 C Overland to Pond Hydrograph 1.14 cfs —f3ursoff Type 11124 hlr 11 YR Rainfall=211.90" I , I Runoff Area=1 .290 ac ,Runoff V©lume=01086,af I 1 Runoff Depth=0.80" Tc 50min CN=73 1 0 1 2 3 4 5 8 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type iil 24-hr i YR Rainfall=2.90" Prepared by {enter your company name here} Page 5 H droCADO 7.00 s/n 001234 O 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff = 0,95 cfs @ 12,09 hrs, Volume- 0.073 af, Depth= 0.75" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 1 YR Rainfall=2.90" Area (ac) CN Description M80 74 >75% Grass cover, Good, HSG C 0.190 61 >75% Grass cover, Good, HSG B 1.170 72 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.0 Direct Entry, Subcatchment PR-1 D: PR-2 Overland to Wetland Hydrograph 1 0.95 cfs I Type III 24-hr 1 YR , Rain'fa11=2.90" k Runoff Area'1 .170 ac An off V; 16 ! =0.073 at E : Runoff Depth=0.75" rL Tc=5.0 min' V N='12 E ! 1 I I E - i i I 00 4 .,2 ..3 b 11 5 6 8 9 i'a 11 12 13 14 1'5 16 i' 3 2 7 ie 19 20 21 22 2 ,4 25 26 27 26 29 'go Time (hours) 8354-pr Type I//24-hr 1 YR Rainfall-2.90" Prepared by tenter your company name here) Page 6 HydroCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff — 1.54 cfs @ 12.07 hrs, Volume= 0.118 af, Depths 2.67" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 1YR Rainfall=2.90" Area ac CN Description 0.530 98 Retail 1 Roof Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Hydrograph 1 1.54 --Runoff Type III 24-hr 1 YR E i i 1 - 'I Rai nfall-2.90'� I I - E I I R I i - Runoff Area=0.530 ac I ! I f ! I - --F . RunoffEVotume-0.1-18 of I 3 Runoff Depth=2.67" I I E I LL 5.o!Imin CN=98 �-O...1 2 .3. 4. . t"--rrs'''ri'r"'1, 1..12"-� 1 'ye"•r:3 r•1 i4 r'�ts^•5 16 17•*,4"r"';16'nrrti19'n�r�20 21lss�22k'sa'•.23�.. , 2'4 25 26 27 28 29 30 Time (hours) I I 8354-pr Type !!I 24-hr 1 YR Rainfall=2.90" Prepared by {enter your company name here) Page 7 HydroCAD@ 7.00 sln 001234 @ 1986-2003 Applied Microcomputer Systems 12/8/2003 Reach 1 R: Design Point 1 [40] Hint: Not Described (Outflow=inflow) i Inflow Area = 12.275 ac, Inflow Depth = 1.76" for 1 YR event Inflow -- 2.59 cfs @ 12,11 hrs, Volume= 1.800 of Outflow = 2.59 cfs @ 12.11 hrs, Volume= 1,800 af, Atten= 0%, Lag= 0.0 min Routing by Stor-lnd+Trans method, Time Span= 0.00-30,00 hrs, dt= 0.01 hrs Reach 1 R: Design Point 1 Hydrograph 2.69 cfs Inflow Outflow Inflow Area-12�275 ac r F ' 2 f I 3 I E 1 i II j iI IE I1EI 3 F I I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type 11l 24-hr 1 YR Rainfall=2.90" Prepared by (enter your company name here) Page 8 HydroCADO 7.00 s/n 001234 O 1986-2003 Applied Microcomputer_Systems 12/8/2003 Pond 1: Pond 1 Inflow Area= 11.105 ac, Inflow Depth = 1.93" for 1YR event Inflow = 22.25 cfs @ 12.10 hrs, Volume= 1.785 of Outflow - 2.41 cfs @ 12.97 hrs, Volume= 1.727 af, Atten= 89%, Lag= 51.7 min Primary -- 2.41 cfs @ 12.97 hrs, Volume 1.727 of Routing by Stor-Ind method, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Starting Elev= 123.20' Surf.Area= 16,154 sf Storage= 10,913 cf Peak Elev= 125,36' @ 12.97 hrs Surf.Area=20,239 sf Storage=50,236 cf (39,323 cf above start) Plug-Flow detention time= 338.1 min calculated for 1.477 of (83% of inflow) Center-of-Mass det. time=216.2 min ( 1,020.0 - 803.8 ) # Invert Avail.Storage Storage Description 1 122.50' 123,619 cf Custom Stage Data(Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 122.50 14,500 0 0 123.00 15,790 7,573 7,573 124.00 17,610 16,700 24,273 125.00 19,520 18,565 42,838 126.00 21,514 20,517 63,355 127.00 23,570 22,542 85,897 128.00 25,670 24,620 110,517 128.50 26,740 13,103 123,619 # Routing Invert Outlet Devices 1 Primary 123.20' 8.0" Vert. Orifice/Grate C=0.600 2 Primary 125.20' 18.0" Vert. Orifice/Grate C= 0.600 3 Primary 127,50' 20.0' long x 11.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.53 2.59 2.70 2.68 2.67 2.68 2.66 2.64 Primary OutFlow Max=2.41 cfs @ 12.97 hrs HW=125.36' (Free Discharge) 1=OrificelGrate (Orifice Controls 2.27 cfs @ 6.5 fps) 1.3= =Orifice/Grate (Orifice Controls 0.14 cfs @ 1.4 fps) Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 1 i 8354-pr Type 11124-hr 1 YR Rainfall=2.90" Prepared by {enter your company name here} Page 9 H dr©CADO 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Pond 1: Pond 1 Hydrograph 24 3 23: 22.25 cis — ntlow —Primary 22= 2,- Inflow Area=11 .105 as 205 ; ,9 a Peak Elev f 1 17; ; 16- Storage-50,236 'Cf a 14 - 0 12 - 10 8 : 7- - , 4 3 2.41 cis - 1 i - ....I....k..,.;....,....1....,....�....�....,....E.. �....�.... ...,E ,.�.�,..�.�i..�.�, �,�w�lwr�r 0 1 2 3 4 5 6 7 8 $ 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type Ill 24-hr 2YR Rainfall=3.10" Prepared by {enter your company name here) Page 10 HydroCADO 7.00 sln 001234 OO 1986-2003 Applied Microcomputer Systems 12/812003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking f Runoff Area=7.640 ac Runoff Depth=2.16" Flow Length=1,430' Tc=8.8 min CN=91 Runoff=17.37 cfs 1.378 of Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Lands Runoff Area=1.645 ac Runoff Depth=2.55" Tc=5.0 min CN=95 Runoff=4.82 cfs 0.349 of Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff Area=1.290 ac Runoff Depth=0.92" Tc=5.0 min CN=73 Runoff=1.34 cfs 0.099 of Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff Area=1.170 ac Runoff Depth=0.87" Tc=5.0 min CN=72 Runoff=1.13 cfs 0.085 of Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff Area=0.530 ac Runoff Depth=2.87" Tc=5,0 min CN=98 Runoff=1.65 cfs 0.127 of Reach 1 R: Design Point 1 Inflow=3.08 cfs 1.977 of Outflow=3.08 cfs 1,977 of Pond 1: Pond 1 Peak Elev=125.52' Storage=53,553 cf Inflow=24.29 cfs 1,953 of Outflow=2.91 cfs 1.893 of Total Runoff Area = 12.275 ac Runoff Volume =2.037 of Average Runoff Depth = 1.99" 8354-pr Type 11124-hr 2YR RainfaFl=3.10" Prepared by {enter your company name here) Page 11 H droCADO 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 A: PR-1 A Proposed Retail 1 and Parking for Site Runoff -- 17.37 cfs Q 12,12 hrs, Volume= 1.378 af, Depth= 2.16" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2YR Rainfall=3.10" Area ac CN Description 0,130 98 Existing Bank Roof 0.720 61 >75% Grass cover, Good, HSG B 0.650 74 >75% Grass cover, Good, HSG C 0.590 74 Bank:>75% Grass cover, Good, HSG C 5.550 98 Parking, sidewalks 7.640 91 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.3 50 0.0240 0.2 Sheet Flow, Grass: Short n= 0.150 P2= 3.10" 0.4 40 0.0500 1.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.8 450 0.0400 4,1 Shallow Concentrated Flow, Paved Kv=20.3 fps 1.3 890 0.0500 11.0 8,63 Circular Channel (pipe), Diam= 12.0" Area= 0.8 sf Perim= 3.1' r= 0.25' n=0.012 8.8 1,430 Total Subcatchment PR-1 A: PR-1 A Proposed Retail 1 and Parking for Site Hydrograph 17.37 c€s —Runof€ 18= � , I [ 3 I c� Type III 24-hr 2YR-- 16- - -; - --I- - I 13_ -;--;----- -. . .I..... _._a__II__ Runoff-Area=1.640 ac-- 12: LI L 11 unoff;Volume .378 of=, 10: - -` - , ..Runoff. Depth=2.1 6„ O y P_ ._ _ _ .. _ 4 I j 13 i 3 - - - 4 s� Flow Length=1 ,430' 7 ... - --- - - ., I 5- - .Tc^8.8 m i n 4: , CN= 1 , 2: - 8 9 10 11 12 13 14 15 1 S 17 18 19 20 21 22 23 24 25 26 27 28 29 30 0 1 2 3 777 7 Time (hours) 8354-pr Type Ill 24-hr 2YR Rainfall=3.10" Prepared by {enter your company name here} Page 12 HydroCADO 7.00 s/n 001234 0 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Runoff = 4.82 cfs Q 12.07 hrs, Volume= 0.349 af, Depth= 2.55" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type Ill 24-hr 2YR Rainfall=3.10" Area (ac) CN Description 0.270 98 Driveway 0.150 61 >75% Grass cover, Good, HSG B 0.523 98 Retail 2 Roof 0.702 98 Retail 3 Roof 1.645 95 Weighted Average To Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Hydrograph 5 4.B2 cfs i —Runoff 1 � I Type III 24-hr 2YR II , E E al -- ;-- - ;-Ra M 1.;3:.� 0 4 Runoff Area='1 .645 ac I � 1 I E 1 1 - 1 o1u 1 N n f 1 e- .� 3- � - . ,Ru , o; f rV, m , �0.349 of Runoff Depth=2.55 W I ` TI I 2- i i _ J_ I i -r 5 O'min -1'- - I 1 I 3 3 ; CN=95 i E I 1 . , . �- .. ..... ... ..... ..,. ...-•S-•'•-Imo.•.-e'�^F^.�.^I.:,T�^•^..�FZ�l.9'1"> i` ...... ��1 •1' 1 i' 4 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) d 8354-pr Type If!24-hr 2YR Rainfall=3.10" Prepared by (enter your company name here} Page 13 H droCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff - 1.34 cfs Q 12.08 hrs, Volume= 0.099 af, Depth= 0.92" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2YR Rainfall=3.10" Area ac CN Description 0.380 74 >75% Grass cover, Good, HSG C 0.620 61 >75% Grass cover, Good, HSG B 0.290 98 Reserve Parking Area 1,290 73 Weighted Average Tc Length Slope Velocity Capacity Description (min) Meet) (ft/ft} (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 C: PR-1 C Overland to Pond Hydrograph 1.34 cfs —Runofl I , I Type III 24-fir 2YR Rainlfall=3.1.0 i 1_ LR =1 .290 ac =0.Og9 of pth-0.92'` LL =50 min CN=73 I f 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type I1124-hr2YR Rainfalf=3.10" Prepared by {enter your company name here} Page 14 HydroCAD@ 7.00 s/n 001234 @ 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff = 1.13 cfs @ 12.08 hrs, Volume= 0.085 af, Depth= 0.87" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 2YR Rainfall=3.10" Area (ac) CN Description 0.980 74 >75% Grass cover, Good, HSG C 0.190 61 >75% Grass cover, Good, HSG B 1.170 72 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.0 Direct Entry, Subcatchment PR-1 D: PR-2 Overland to Wetland Hydrograph 1.13 cis —Runoii v E , I 3 Type HI 24-hr 2YR -Rai nfal i 3.1'Q'�-. Runoff Area!=1 ,170 ac E I N Runoff Volume=0.08511af Runoff Depth-0.87'1' LL ! 3 3 3 Tc 5'0mir' CN=72 e j I o 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) II G i 8354-pr Type Ili 24-hr2YR Rainfall=3.10" Prepared by (enter your company name here) Page 15 H droCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff = 1.65 cfs @ 12.07 hrs, Volume= 0.127 af, Depth= 2.87" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2YR Rainfall=3.10° Area (ac) CN Description j 0.530 98 Retail 1 Roof Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Hydrograph 1.65 of --Runoff Type III 24-hr 2YR Rainfall'3.10" I E I Runoff Area=0.530 ac w Runoff Vol ume=0.127:af ° 1_ - . ---- ---- of g Runoff Depth=2.87" Tc=5 0'm i n t CN=98 3 I 0- .... .... .... ....,....,--..'�'r-r-rrl'�"rrl---rl�rr,"-r' 'rr'�1-'r"1-n'4a 1-.+,sly..,�...!...;..1..,.,.1.:.: •�..aTj..... ..... . . . . . 0 1 2 3 4 5 fi 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 2i 28 29 30 Thno (hours) 8354.pr Type 11124-hr2YR Rainfall=0.10" Prepared by (enter your company name here) Page 16 H droCAD®7.00 s/n 001234 @ 1986-2003 Applied Microcomputer Systems 12/8/2003 Reach 1 R: Design Point 1 [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12.276 ac, Inflow Depth = 1.93" for 2YR event Inflow = 3.08 cfs @ 12,79 hrs, Volume= 1.977 of Outflow - 3.08 cfs @ 12.79 hrs, Volume= 1.977 af, Atten=0%, Lague 0,0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Reach 1 R: Design Point 1 Hydrograph 3.08 cis —Inflow Outflow Inflow Area=1 2.275 ac I I I : I I : 2- f I tL - - f : 1 - - F 0 1 2 3 4 5 6 7 8 9 110 11 12 13 14 15 16 17 18 19 20 21 22 23 24 26 26 27 28 29 30 Time (hours) i i 8354-pr Type 11124-hr2YR Rainfall=3.10" Prepared by {enter your company name here} Page 17 H droCAD®7.00 s/n 001234 © 1986-2003 A212lied Microcomputer Systems 12/8/2003 Pond 1: Pond 1 Inflow Area = 11.105 ac, Inflow Depth = 2.11" for 2YR event Inflow - 24.29 cfs @ 12.10 hrs, Volume= 1.953 of Outflow = 2.91 cfs @ 12.86 hrs, Volume= 1,893 af, Atten= 88%, L.ag=45.2 min Primary - 2.91 cfs @ 12.86 hrs, Volume= 1.893 of Routing by Star-Ind method, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Starling Elev= 123.20' Surf.Area= 16,154 sf Storage= 10,913 cf Peak Elev= 125.52' @ 12.86 hrs Surf.Area= 20,561 sf Storage= 53,553 cf (42,641 cf above start) Plug-Flow detention time= 330.1 min calculated for 1.642 of (84%of inflow) Center-of-Mass det. time= 215.8 min ( 1,017.3 - 801.6) # Invert Avail.Stora e Storage Description 1 122.50' 123,619 cf Custom Stage Data(Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 122.50 14,500 0 0 123.00 15,790 7,573 7,573 124.00 17,610 16,700 24,273 125.00 19,520 18,565 42,838 126.00 21,514 20,517 63,355 127.00 23,570 22,542 85,897 128.00 25,670 24,620 110,517 . 128.50 26,740 13,103 123,619 # Routing Invert Outlet Devices 1 Primary 123.20' 8.0" Vert. Orifice/Grate C= 0.600 2 Primary 125.20' 18.0" Vert. Orifice/Grate C=0.600 3 Primary 127.50' 20.0' long x 11.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.53 2.59 2.70 2.68 2.67 2.68 2.66 2.64 Primary Out low Max=2.91 cfs @ 12.86 hrs HW=125.52' (Free Discharge) 1=Orifice/Grate (Orifice Controls 2.37 cfs @ 6.8 fps) 2=Orifice/Grate (Orifice Controls 0.54 cfs @ 1.9 fps) 3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 8354-pr Type 11124-hr2YR Rainfall=3.10" Prepared by (enter your company name here) Page 18 HydroCADO 7.00 s/n 001234 0 1986-2003 Applied Microcomputer Systems 12/8/2003 Pond 1: Pond 1 Hydrograph 27- ------- 26: Inflow 24 Cis Primary - --- ------ 24- ... ... ... 0 5-ac-- -Areai-111., 23- - Inflow 20 25. Peak E16v' 'I W F e- --53-55., J- .8 tf [L- 12: 101 . 7 6: 2.91 cis 4 2_ . 5 0 ......... 0 1 2 3 4 5 6 7 8 9 loll 12 13 14 15 16 17 18 19 20 21 22 28 27 28 29 30 Time (hours) I 8354-pr Type 11124-hr 10YR Rainfall=4.50" Prepared by (enter your company name here) Page 19 H droCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Star-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking f Runoff Area=7.640 ac Runoff Depth=3.50" Flow Length=1,430` Tc=8,8 min CN=91 Runoff=27.49 cis 2.227 of Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Lands Runoff Area=1.645 ac Runoff Depth=3.92" Tc=5.0 min CN=95 Runoff=7.25 cis 0.538 of Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff Area=1.290 ac Runoff Depth=1.90" Tc=5.0 min CN=73 Runoff=2.93 cfs 0.204 of Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff Area=1.170 ac Runoff Depth=1.82" Tc=5.0 min CN=72 Runoff=2.54 cfs 0.177 of Subcatchment PR-1E: PR-1E Proposed Retail 1 Runoff Area=0.530 ac Runoff Depth=4.26" Tc=5.0 min CN=98 Runoff=2.41 cis 0.188 of Reach 1 R: Design Point 1 lnflow=9.46 cis 3.264 of Outflow=9.46 cis 3.264 of Pond 1: Pond 1 Peak Elev=126.45' Storage=73,546 ct Inflow=38.69 cfs 3.157 of Outflow=8.87 cfs 3.086 of Total Runoff Area = 12.275 ac Runoff Volume =3.335 of Average Runoff Depth = 3.26" 8354-pr Type It/24-hr 10YR Rainfall=4.50" Prepared by {enter your company name here} Page 20 H droCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1A: PR-1A Proposed Retail 1 and Parking for Site Runoff - 27.49 cfs Q 12.12 hrs, Volume= 2.227 af, Depth= 3.50" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 10YR Rainfall=4.50" Area (ac) CN Description 0.130 98 Existing Bank Roof 0.720 61 >75% Grass cover, Good, HSG B 0.650 74 >75% Grass cover, Good, HSG C 0.590 74 Bank>75% Grass cover, Good, HSG C 5.550 98 Parking, sidewalks 7.640 91 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.3 50 0.0240 0.2 Sheet Flow, Grass: Short n= 0.150 P2= 3,1011 0.4 40 0.0500 1.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.8 450 0,0400 4.1 Shallow Concentrated Flow, Paved Kv= 20.3 fps 1.3 890 0.0500 11.0 8.63 Circular Channel (pipe), Diam= 12.0" Area=0.8 sf Perim= 3.1' r= 0.25' n= 0.012 8.8 1,430 Total Subcatchment PR-1 A: PR-1 A Proposed Retail 1 and Parking for Site Hydrograph 30: --- : - - { -- 27.49 ofs —Runoff 25 26 Type 11.24- 3 r .1 R - f I - E R 2 _ - airifa 2 �ll 4.50" 20 --: -, --.- --r-,- ---- --; .. _... . Runoff Area=7.640-aC-- I E -----f--;- --{-;--- -- -;- Runoff Volume=;2.27af ! f 1 i '. : i.. E . D� 3 __ i_ .3 to ' 3 i ' . I 1 3 f ^��,„ 5 �� I I } I { Runoffptll�3r i Flow Lehgth-1 A 0' : F : m n 4- 2 - - 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 26 26 27 28 29 30 Time (hours) i i 8354-pr Type B/24-hr 10YR Rain fall=4.50" Prepared by (enter your company name here) Page 21 H droCADO 7.00 s/n 001234 OO 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Runoff = 7.25 ofs @ 12.07 hrs, Volume= 0.538 af, Depth= 3,92" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 10YR Rainfall=4.50" Area (ac) CN Description 0.270 98 Driveway 0.150 61 >75% Grass cover, Good, HSG B 0.523 98 Retail 2 Roof 0,702 98 Retail 3 Roof 1.645 95 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Hydrograph 8- 7.25 cis i I—Runoff - Type III 24-hr l OYR -I I 6= Rainfall=4.50-- - f Runoff Area=1 .645 ac : N Runoff Volume=0.538af I I I I L.. L _ I 3 4_ rill f 3 Runoff Depth—3.92 FL r 3 Tc�.5.0 mini CN=95 I 2' ` - ---' --1---- 11 I � I I Lj - 6 I Q- ::..I..rr I....E....�....�....�'.-I..�T�•.��ft.'�I�`•�!i•' .' ;•r-14.�f.��.5�-.-.--.-. 0 1 2 3 4 5 6 7 6 9 10 11 12 13 14 15 16 17 118 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type 11124-hr 10YR Rainfall=4.50" Prepared by {enter your company name here} Page 22 M droCAD®7.00 sh 001234 © 1986-2003 Applied Microcomputer S sterns 12/8/2003 Subcatchment PR-1 Q PR-1 C Overland to Pond Runoff — 2.93 cfs @ 12.08 hrs, Volume= 0.204 af, Depth= 1.90" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 10YR Rainfall=4.50" Area (ac) CN Description _ 0.380 74 >75% Grass cover, Good, HSG C 0.620 61 >75% Grass cover, Good, HSG B 0.290 98 Reserve Parking Area 1.290 73 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 C: PR-1 C Overland to Pond Hydrograph 2.93 cfs i E Runoff ' Type Ill 24-hr. 10YR Rainfall=4.50" Runoff Area=1 .290 ac f N Ru III, of f ;VOIUme=0.204 of Runoff Depth=1L901' LL 4 I ! 3 1 k t I ! ! Tc=5.06min i CN=73-- . I II 0-Q...1....2... ....4....5....6....7.... ... 10 iF# 12 131~4�15 1$1 1$ 19---r�,�--- ,�'--;- I 1' 3 24 25 26 27 26 29 30 Time (hours) 1 8354-pr Type ///24-hr 10YR Rainfai1=4.50" Prepared by (enter your company name here) Page 23 HydroCAD&7,00 s/n 001234 Oo 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff = 2.54 cfs Q 12.08 hrs, Volume= 0.177 af, Depth= 1,82" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30,00 hrs, dt= 0.01 hrs Type III 24-hr 10YR Rainfall=4.50" Area (ac) CN Description ^ 0.980 74 >75% Grass cover, Good, HSG C 0,190 61 >75% Grass cover, Good, HSG B 1.170 72 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 D: PR-2 Overland to Wetland Hydrograph 2.54 efs Runoif Type III 24-hr 10YR Rainfa11=4.50" 2- Runoff Area=1 .170 ac Runoff;Volume=0.177 of Runoff Depth=1 .82" I I I i I I Tc=5.0 min i- ' --I---- - +- --I-- - - CN=72 0- ..........:....... . ...... .... ......... .... .. .. .. .... . .. ...................................... 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type I//24-hr 10YR Rainfall=4.50" Prepared by {enter your company name here} Page 24 HydroCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 E. PR-1 E Proposed Retail 1 Runoff _ 2.41 cfs Q 12.07 hrs, Volume= 0.188 af, Depth= 4.26" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 10YR Rainfall=4.50" Area (ac) CN Description 0.530 98 Retail 1 Roof Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, - Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Hydrograph 2.4f cfs ; —Runoff Type III 24-hrs 10YR I 1 k I - 2- ; -;- _ _ _. _ . ..Rainfall;4.50" Runoff Area=0.530 ac Runoff;Vo1ume=0.188 of It : Runoff Depth-4.26" f I F 1 _ ,- � --5 Omin CN-98 I 1 ... �••.., ,:. ..:,'S�!:•,~.S�j..�..�1�^''��1:l.'�1'`•111 'SLR-14.S:�1�.4.41::?1�.4TI�, , �. .. .I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) V I I I 8354-pr Type /1124-hr 10YR Rainfall=4.50" Prepared by (enter your company name here) Page 25 l i droCADO 7.00 s/n 001234 OO 1986-2003 Applied Microcomputer S stoms 12/8/2003 Reach 1 R: Design Point 1 [40] Hint: Not Described (Outflow=lnflow) Inflow Area = 12.275 ac, Inflow Depth = 3,19" for 10YR event Inflow = 9.46 cfs Q 12.48 hrs, Volume= 3.264 of Outflow = 9.46 cfs Q 12.48 hrs, Volume= 3.264 af, Atten= 0%, Lag=0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Reach 1 R: Design Point 1 Hydrograph I f 10- 9.46 cis : r Inflow -Outflow I Inflow Area:12f.275 ac 7- p , , 3- ., I 2_.________._ _ _f--.- ! 3 : � ....,....E....,.. ., ..,. ..,....��.:.. wr.'wrW�ww..�w."C".'.s.".w�.�Wl..;r�'4 "'�71�""�� 1 'I 0 1 2 3 4 6 6 7 B 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type III 24-hr 10YR Rainfall=4.50" Prepared by (enter your company name here) Page 26 H droCAD@ 7.00 s/n 001234 @ 1986-2003 Applied Microcomputer Systems 12/8/2003 Pond 1: Pond 1 Inflow Area = 11.105 ac, Inflow Depth = 3.41" for 10YR event Inflow = 38.69 cfs @ 12.10 hrs, Volume= 3.157 of Outflow = 8.87 ofs @ 12.53 hrs, Volume= 3.086 af, Allen=77%, Lag=25.9 min Primary - 8.87 cfs @ 12.53 hrs, Volume= 3.086 of Routing by Stor-Intl method, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Starting Elev= 123.20' Surf.Area= 16,154 sf Storage= 10,913 cf Peak Elev= 126.45' @ 12.53 hrs Surf.Area= 22,444 sf Storage= 73,546 cf (62,633 cf above start) Plug-Flow detention time=261.9 min calculated for 2.836 of (90%of inflow) Center-of-Mass det. time= 182.9 min ( 972.6 - 789.8 ) # Invert Avall.Storage Storage Description 1 122.50' 123,619 cf Custom Stage Data (Prismatic) Listed below ^ Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet)_ 122.50 14,500 0 0 123.00 15,790 7,573 7,573 124.00 17,610 16,700 24,273 125.00 19,520 18,565 42,838 126.00 21,514 20,517 63,355 127.00 23,570 22,542 85,897 128.00 25,670 24,620 110,517 128.50 26,740 13,103 123,619 # Routing Invert Outlet Devices 1 Primary 123.20' 8.0" Vert. Orifice/Grate C= 0.600 2 Primary 125.20' 18.0" Vert. Orifice/Grate C= 0.600 3 Primary 127.50' 20.0' long x 11.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.53 2.59 2.70 2.68 2.67 2.68 2.66 2.64 Primary OutFlow Max=8.87 cfs @ 12.53 hrs HW=126.45' (Free Discharge) 1=Orifice/Grate (Orifice Controls 2.87 cfs @ 8.2 fps) 2=Orifice/Grate (Orifice Controls 6.00 cfs @ 3.8 fps) 3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) k I 8354-pr Type l/124-hr 1QYR Rainfall=4.50" Prepared by {enter your company name here} Page 27 HydroCADO 7.00 s/n 001234 O 1986-2003 Applied Microcomputer Systems 12/8/2003 j Pond 1; Pond 1 Hydrograph 42- 40. 38.ti9 cfs — flow 36: - ---.. _ _ - . Primary 36- -- -- = -- - Inflow-Area-11 �.-145-ac-- : 34- i ,- Peak Elea=126.45 28 Storage=?3,546 tf i f - N24= - :--:- ,--:-- - - ------ ---- I , : 2z - 0 20: - ILi , L , 1 12 10 6.87 cts ' i 4- 2: - 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type 11124-hr 25YR Rainfa11-5.40" Prepared by (enter your company name here) Page 28 HydroCADO 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PR-1A: PR-1A Proposed Retail 1 and Parking f Runoff Area=7.640 ac Runoff Depth=4.37" Flow length=1,430' Tc=8.8 min CN=91 Runoff=33.95 cfs 2.783 of Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Lands Runoff Area=1.645 ac Runoff Depth=4.82" Tc=5.0 min CN=95 Runoff=8.79 cfs 0.660 of Subcatchment PRA C: PR-1 C Overland to Pond Runoff Area=1.290 ac Runoff Depth=2.60" Tc=5.0 min CN=73 Runoff=4.06 cfs 0,279 of Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff Area=1.170 ac Runoff Depth=2.51" Tc=5.0 min CN=72 Runoff=3.55 cfs 0.245 of Subcatchment PR-1 E: PR-1E Proposed Retail 1 Runoff Area=0.530 ac Runoff Depth=5,16" Tc=5.0 min CN=98 Runoff=2.90 cfs 0.228 of Reach 1 R: Design Point 1 inflow=12.94 cfs 4.118 of Outflow=12.94 cfs 4.118 of Pond 1: Pond 1 Peak Elev=127.03' Storage=86,663 of Inflow=47.99 cfs 3.950 of Outflow=11.99 cfs 3.873 of Total Runoff Area= 12.275 ac Runoff Volume =4.195 of Average Runoff Depth =4.10" fi I I 8354-pr Type If/24-hr 25YR Rainfall-5.40" Prepared by {enter your company name here) Page 29 H droCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking for Site Runoff = 33.95 cfs @ 12.12 hrs, Volume= 2.783 af, Depth= 4.37" Runoff by SOS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type Ili 24-hr 25YR Rainfall=5.40" Area (ac) - CN Description 0.130 98 Existing Rank Roof 0.720 61 >75% Grass cover, Good, HSG B 0.650 74 >75% Grass cover, Good, HSG C 0.590 74 Bank:>75% Grass cover, Good, HSG C 5.550 98 Parking, sidewalks 7.640 91 Weighted Average Tc Length Slope Velocity Capacity Description min feel) ft/ft ft/sec cfs 5.3 50 0.0240 0.2 Sheet Flow, Grass: Short n=0.150 P2= 3.10" 0.4 40 0.0500 1.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.8 450 0.0400 4.1 Shallow Concentrated Flow, Paved Kv= 20.3 fps 1.3 890 0.0500 11.0 8.63 Circular Channel (pipe), Diam= 12.0" Area= 0.8 sf Perim= 3.1' r= 0.25' n=0.012 8.8 1,430 Total Subcatchment PR-1 A: PR-1 A Proposed Retail 1 and Parking for Site Hydrograph 36- 36 33.95 C(s —Runoff 34- . 32'. -TYpe-111 24-hIr 25YR- 28- ;--- - - - - R aI Mal1=5.4O" _�. E E A Runoff rea=7.640 ad 24 e .783 22- _ '1306 ffEVOF WM of -2 a 3 1 20=• o ,6= Runoff Depth,4.37" LL : Flow-Length. ' 1430' f 6- CN=91 a: _ 2_ 0 1 2 37, 5 6 7 8 9 10 11 12 1314 15 16 17 i 8 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type III 24-hr 25YR Rainfall=5.40" Prepared by {enter your company name here} Page 30 HydroCADO 7.00 s/n 001234 OO 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Runoff = 8.79 cfs Q 12.07 hrs, Volume= 0.660 af, Depth= 4,82" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0,00-30.00 hrs, dt= 0.01 hrs Type Ill 24-hr 25YR Rainfall=5.4011 Area ac CN Description 0.270 98 Driveway 0.150 61 >75% Grass cover, Good, HSG B 0.523 98 Retail 2 Roof 0.702 98 Retail 3 Roof 1.645 95 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Hydrograph 8.79 cis I I T pe IIN _24-hr_25YR Ra 11fall 5.40" 7- - Runoff Area=1 .645 ac 6- Runoff�Vo1ume-0 6601 N I I — a 3 5- Runoff Depth=4.82 min f I CNW".VV , e i I I 1 I 1 E E I f f 1 3 I - 1 0 .1 .,. ., sY2^1',•%•• ^!^�I�.�f--��i1f411.�14!�l'^''- '>�-- 1�-�> [ 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 i 9 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type 11124-hr 25YR Rainfafl=5.40" Prepared by (enter your company name here) Page 31 H droCAD®7.00 s/n 001234 c0 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff -- 4.06 cfs @ 12.08 hrs, Volume= 0.279 af, Depth= 2.60" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 25YR Rainfall=5.40" Area (ac) CN Description 0.380 74 >75% Grass cover, Good, HSG C 0.620 61 >75% Grass cover, Good, HSG B 0.290 98 Reserve Parking Area 1.290 73 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 C: PR-1 C Overland to Pond Hydro}raph 4.06 cis Runaff A- . - - Type II124-hr, 25YR Rainfall 5.40" 3- - Runoff Area=1 .290 ac Runoff VoWM' 01 0.279 of 3 - _ - ' i Runoff Depth=2.60" A - 3 3 I - - { j I I I rL 2- ., �� � I 1 I I i I I ' ;Tc=5 0 m1n - I , III II CN=73 I 3 I I I I I 1 I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type 11124-hr 25YR Rainfall=5.40" Prepared by f enter your company name here} Page 32 HydroCAD®7.00 s/n 001234 O 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff = 3.55 cfs @ 12.08 hrs, Volume= 0.245 af, Depth= 2.51" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 25YR Rainfall=5.40" Area (ac) CN Description 0.980 74 >75% Grass cover, Good, HSG C 0.190 61 >75% Grass cover, Good, HSG B 1.170 72 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 D. PR-2 Overland to Wetland Hydrograph Type III 24-hr 25YR wlo - � 4 3- -.- - Rain'#all-5,.. 11 .. Runoff Area=1 .170 ac ff Volbme=;0.245 of Runo.N 1 f 1 w 2 2- r- --}-- Ruriioff-Depth-, 3:51 -- Tc=501mir 1 CN=72I IE E _ 1 e 3 II 1 E E 01 ._ 0 1 2 3 4 5 8 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Ttme (hours) 8354-pr Type 11124-hr 25YR Rainfall=5.40" Prepared by (enter your company name here) Page 33 M droCADO 7.00 s/n 001234 @ 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff = 2.90 cfs @ 12.07 hrs, Volume= 0.228 af, Depth= 5.16" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 25YR Rainfall=5.40" Area (ac) CN Description 0,530 98 Retail 1 Roof Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.0 Direct Entry, Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Hydrograph : I 3 -- 2.90of$ i3unoil Type 111 24-hr 25YR Rai Mal l=5,.40" Runoff Area=0.530 ac 2 y Runoff Volume=0 228 of Runoff Depth=5.1;6" L6 Tc=5:0'min _ CN=98 I JI 1 -I _ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Thno (hours) 8354-pr Type ///24-hr 25YR Rainfa11=5.40" Prepared by {enter your company name here} Page 34 HydroCADO 7.00 s/n 001234 @ 1986-2003 Applied Microcomputer Systems 12/8/2003 Reach 1 R: Design Point 1 [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12.275 ac, Inflow Depth = 4.03" for 25YR event Inflow — 12.94 cfs @ 12.42 hrs, Volume= 4.118 of Outflow = 12.94 cfs @ 12.42 hrs, Volume= 4.118 af, Atten=0%, I_ag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Reach 1 R: Design Point 1 Hydrograph 14- --- 12 94 cfs —Inflow 13: ^-Outflow 12= :Inflow Areay12.275 ac 10 - 9- L^� 8- a r I I 3 3 11. 4- ; 3- 2- - E - - 0 1 2 3 4 5 6 7 E; 9 10 1, 12 13 14 15 16 17 16 19 20 21 22 23 24 25 26 27 28 29 30 Tlme (hours) 8354-pr Type III 24-hr 25YR Rainfall=5.40" Prepared by (enter your company name here) Page 35 HydroCADO 7.00 s/n 001234 ® 1986-2003 Applied Microcomputer Systems 12/8/2003 Pond 1: Pond 1 Inflow Area = 11.105 ac, Inflow Depth = 4.27" for 25YR event Inflow = 47.99 cfs @ 12.10 hrs, Volume= 3.950 of Outflow = 11.99 cfs @ 12.51 hrs, Volume= 3.873 af, Atten= 75%, Lag= 24.5 min Primary - 11.99 cfs @ 12.51 hrs, Volume= 3.873 of Routing by Stor-Ind method, Time Span= 0.00-30.00 hrs, dt=0,01 hrs Starting Elev= 123.20' Surf.Area= 16,154 sf Storage= 10,913 cf Peak Elev= 127.03' @ 12.51 hrs Surf.Area= 23,635 sf Storage=86,663 cf (75,750 cf above start) Plug-Flow detention time=235.2 min calculated for 3.623 of (92% of inflow) Center-of-Mass det. time= 167.9 min ( 952.3 - 784.4 ) # Invert Avail.Stora e Storage Description 1 122.50' 123,619 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store feet s -ft cubic-feet cubic-feet 122.50 14,500 0 0 123.00 15,790 7,573 7,573 124.00 17,610 16,700 24,273 125.00 19,520 18,565 42,838 126.00 21,514 20,517 63,355 127.00 23,570 22,542 85,897 128.00 25,670 24,620 110,517 128.50 26,740 13,103 123,619 # Routing Invert Outlet Devices 1 Primary 123.20' 8.0" Vert. Orifice/Grate C= 0.600 2 Primary 125.20' 18.0" Vert. Orifice/Grate C= 0.600 3 Primary 127.50' 20.0' long x 11.0' Breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.53 2.59 2.70 2.68 2.67 2.68 2.66 2.64 Primary Out low Max=11.99 cfs @ 12.51 hrs HW=127,03' (Free Discharge) 1=Orifice/Grate (Orifice Controls 3.14 cfs @ 9.0 fps) 2=Orif1celGrate (Orifice Controls 8.85 cfs @ 5.0 fps) 3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 8354-pr Type Ill 24-hr 25YR Rainfall=5.40" Prepared by {enter your company name here} Page 36 HydroCADO 7.00 sln 001234 O 1986-2003 Applied Microcomputer_Systems 12/8/2003 Pond 1: Pond 1 Hydrograph 52' - 54' -- , -; - --Inflow 48` - -- -.1 —Pnmary 44- I nflow Area=11.1 05 ac 42 44= - e 7`.0 Peak E �,1 � 3" 34 : - - ._ i Sfiora e�86,663 cf - 32' -- - - - - - - -'-- -- 34; - ; -', 3 I ! : 22= 16-' 11.99 c(s 12- I - : : F 0- ... ...: ....,•.. ,:...,.<..... .......:........�"---:.,..,.,.,;..,,,....,","'".'�"'.":,•;•.lam-r.�,.:.-;'•�y"s-,:.r, ;....,....,....,....,...,,....,...., 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type ill 24-hr 100YR Rainfall=6.30" Prepared by f enter your company name here} Page 37 HydroCADO 7,00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking f Runoff Area=7.640 ac Runoff Depth=5.25" Flow Length=1,430' Tc=8.8 min CN=91 Runoff=40.37 cis 3.343 of Subcatchment PR-1S: PR-1B Proposed Retail Driveway/Lands Runoff Area=1.645 ac Runoff Depth=5.71" Tc=5.0 min CN=95 Runoff=10.33 cis 0.783 of Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff Area=1.290 ac Runoff Depth=3.34" Tc=5.0 min CN=73 Runoff=5.24 cfs 0.359 of Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff Area=1.170 ac Runoff Depth=3.24" Tc=5.0 min CN=72 Runoff=4.61 cis 0.316 at Subcatchment PR-11E: PR-1 E Proposed Retail 1 Runoff Area=0.530 ac Runoff Depth=6.06" Tc=5.0 min CN=98 Runoff=3.39 cis 0.268 of Reach 1 R: Design Point 1 Inflow=16.79 cfs 4.986 of Outflow=16.79 cis 4.985 of Pond 1: Pond 1 Peak Elev=127.59' Storage=100,409 cf Inflow=57.28 cis 4.753 of Outflow=15.67 cis 4.669 of Total Runoff Area = 12.275 ac Runoff Volume = 5.069 of Average Runoff Depth =4.95" 8354-pr Type 11124-hr 100YR Rainfall=6.30" Prepared by {enter your company name here} Page 38 HydroCAD®7,00 s/n 001234 0 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking for Site Runoff — 40.37 cfs Q 12.12 hrs, Volume= 3.343 af, Depth= 5.25" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 100YR Rainfall=6.30" Area (ac) CN Description 0.130 98 Existing Bank Roof 0.720 61 >75% Grass cover, Good, HSG B 0.650 74 >75% Grass cover, Good, HSG C 0.590 74 Bank:>75% Grass cover, Good, HSG C 5.550 98 Parking, sidewalks 7,640 91 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.3 50 0.0240 0.2 Sheet Flow, Grass: Short n= 0.150 P2= 3.10" 0.4 40 0.0500 1.6 Shallow Concentrated Flow, Short Grass Pasture Kv=7.0 fps 1.8 450 0.0400 4.1 Shallow Concentrated Flow, Paved Kv= 20.3 fps 1.3 890 0.0500 11.0 8.63 Circular Channel (pipe), Diam= 12.0" Area= 0.8 sf Perim=3.1' r= 0.26' n= 0.012 8.8 1,430 Total Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking for Site Hydrograph 44: - 42 - 40.37 cfs 38 Type. III 24-h1r 100YR- , 36' - - . - ---r-,--I-- - - -- - -- --f- -- -- -- -- -, 34 Rainfall I : 30 Runoff Area=7�640.ac. - 26. --- Y---- - - — - 3F -- : Runoff Volume--;3. 4 a 24 -- -- -- - -,- --I- r-:-- 22 Runoff Depth- 7 3 20- , - - - 18 - Flow Length- A W 14- I I 12 - ---, - ---- - CN=91 , 2( I 0 1 2 3 4 5 6 7 8 9 i D 11 i 2 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 1 I 1 8354-pr Type 11124-hr 10t?YR Rainfall=6.30" Prepared by {enter your company name here) Page 39 H droCAD®7.00 s/n 001234 © 1986-2003 Aplied Microcomputer Systems 12/8/2003 Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Runoff - 10.33 cfs @ 12.07 hrs, Volume= 0.783 af, Depth= 5.71" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 100YR Rainfall=6.30" Area ac CN Description 0.270 98 Driveway 0.150 61 >75% Grass cover, Good, HSG B 0.523 98 Retail 2 Roof 0.702 98 Retail 3 Roof 1.645 95 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, ^ Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Hydrograph : 10.33 c#s —Runoff 10- Type HI 24-hr 100YR -- - - - - Rainf - all=6,30" I Runoff Area1 ,645 ac Runoff Volu me=0.783 af 1 : Runoff Depth 5.7 LL 5- Tc-! 5 7-01 m"rn 4- CN^95 i - i V- .... ....f...., ,..1. .. ....,.:..1'•`rr"Irr""�"""'r'1q�r"t'I,..,',w1TT�� ZSR�1Y•Y:":�"S;.'4WK"�,!-4-.•.-,.:..,....1....�....,. ..t. �. ..�.... 0 1 2 3 4 5 fi 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 83514-pr Type 11124-hr 100YR Rainfall=6.30" Prepared by {enter your company name here} Page 40 H droCAD®7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff - 5.24 cfs Q 12.08 hrs, Volume= 0.359 af, Depth= 3.34" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 100YR Rainfall=6.30" Area (ac) CN Description 0.380 74 >75%% Grass cover, Good, HSG C 0.620 61 >75% Grass cover, Good, HSG B 0.290 98 Reserve Parking Area 1.290 73 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, _ Subcatchment PR-1 C: PR-1 C Overland to Pond Hydrograph 5.24 cfs Type III 24-hr 100YR : Rainfal1=6.30'` 4- Runoff Area=1 .29f0 ac Runoff Volume=0.359:of 3 Runoff Depth=3.34" E I I : Tc=5.0'mi� -: N=73 f I E 1 3 I e r 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type if124-hr 1OOYR Rainfaf1-6.30u Prepared by (enter your company name here) Page 41 H droCAD@ 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff — 4.61 cfs @ 12.08 hrs, Volume= 0.316 af, Depth= 3,24" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 100YR Rainfall=6.30" Area ac CN Description 0.980 74 >75% Grass cover, Good, HSG C 0.190 61 >75% Grass cover, Good, HSG B 1.170 72 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.0 Direct Entry, Subcatchment PR-1 D: PR-2 Overland to Wetland Hydrograph I 4.61 cfs I I I t I Type'11 24-hr 100YR Rair1fal1=63 Runoff Area=1 .170 ac 3- Runoff V01ume=0.316 of Runoff Depth=3,24" 2- --;- -;-- Tc=5.0 min CN=72 0 jL 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) $354-pr Type I1124-hr 100YR Rainfall=6.30" Prepared by {enter your company name here} Page 42 H droCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 12/8/2003 Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff = 3.39 cfs @ 12.07 hrs, Volume= 0.268 af, Depth= 6,06" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type Ill 24-hr 100YR Rainfall=6.3011 Area ac CN Description 0.530 98 Retail 1 Roof To Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5,0 Direct Entry, Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Hydrograph 3.39 cfs --Runoff 3 Type 11124lhr 100YR 3- L J .; Rainfa11-6.30" I Runoff Area=0.530 ac 1 I i � I N Runoff Volume=:0.1 18 a _3 2- E Runoff Depth 6.06" IL l ] a I 5110 min Tc= I I III I CN=98 0- .. ,... ... ^+mom-�Trr j..-----I-•- �r-1-r•--'�-l-�-n-i 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 26 29 30 Time (hours) 8354-pr Type 11124-hr 100YR Rainfall=6.30" Prepared by {enter your company name here} Page 43 H droCADO 7.00 s/n 001234 @ 1986-2003 Applied Microcomputer Systems 12/8/2003 Reach 1 R. Design Point 1 [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12.275 ac, Inflow Depth = 4.87" for 100YR event Inflow = 16.79 cfs @ 12.47 hrs, Volume 4,985 of Outflow = 16.79 cfs @ 12.47 hrs, Volume= 4.985 af, Men=0%, Lag= 0.0 rain Routing by Stor-Ind+Trans method, Time Span= 0.00-30.00 hrs, dt=M1 hrs Reach 1 R: Design Point 1 Hydrograph fl 16.79 cfs —In ow 17: r r —Oulflow Inflow Aye a 12,2?5 c 13- i - I , 12- _ n 10- --; r- --; --- - - vJ � I 7: - {1 1 I 3 3 1 I I I I I f -- r 7- , , 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type ill24-hr 100YR Rainfall=6.30" Prepared by (enter your company name here) Page 44 HydroCADO 7.00 s/n 001234 4 1986-2003 Applied Microcomputer Systems 12/8/2003_ Pond 1: Pond 1 Inflow Area = 11.105 ac, Inflow Depth = 5.14" for 100YR event Inflow = 57,28 cfs @ 12.10 hrs, Volume= 4.753 of Outflow - 15.67 cfs @ 12.49 hrs, Volume= 4.669 af, Atten= 73%, Lag=23.1 min Primary - 15.67 cfs @ 12,49 hrs, Volume= 4.669 of Routing by Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Starting Elev= 123,20' Surf.Area= 16,154 sf Storage= 10,913 of Peak Elev= 127.59' @ 12.49 hrs Surf.Area=24,808 sf Storage= 100,409 of (89,497 of above start) Plug-Flow detention time=217.1 min calculated for 4.418 of (93%of inflow) Center-of-Mass det. time= 158.0 min ( 938.0 - 780.0 ) # Invert Avall.Storage Storage Description 1 122.50' 123,619 of Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store feet s -ft cubic-feet cubic-feet 122.50 14,500 0 1 0 123.00 15,790 7,673 7,573 124.00 17,610 16,700 24,273 125.00 19,520 18,565 42,838 126.00 21,514 20,517 63,355 127.00 23,570 22,542 85,897 128.00 25,670 24,620 110,517 128.50 26,740 13,103 123,619 # Routing Invert Outlet Devices 1 Primary 123.20' 8.0" Vert. Orifice/Grate C= 0.600 2 Primary 125.20' 18.0" Vert. Orifice/Grate C= 0.600 3 Primary 127.50' 20.0' long x 11.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.53 2.59 2.70 2.68 2.67 2.68 2.66 2.64 Primary Outflow Max=15.63 cfs @ 12.49 hrs HW=127.59' (Free Discharge) 11=Orifice/Grate (Orifice Controls 3.38 cfs @ 9.7 fps) 2=Orifice/Grate (Orifice Controls 10.89 cfs @ 6.2 fps) 3=Broad-Crested Rectangular Weir (Weir Controls 1.35 cfs @ 0.8 fps) 8354-pr Type III 24-hr 1OOYR Rainfall=6.30° I Prepared by {enter your company name here) Page 45 3 Applied Microcomputer Systems 12/8/2003 Hy droCAD®7.00 slrt 001234 01986-200_ _ Pond 1: Pond 1 Hydrograph 60 57.28 cis —Inflow —Nmary 55 inflow Area l. 1 .105 ac 50: Peak Elegy-127.59' : 40 Storage=10Q,409 c .._ N 0 30 i 25 15.67 cfs 10 ; 5- .. 3 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Tlme (hours) i i i 9 1 1 l i