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HomeMy WebLinkAboutWPO201500066 Plan - E&S 2014-07-29 Name Virginia Stormwater Management Program(VSMP) OS �t Application for Albemarle County +, 111,01,0 Project Name: Old vii( e. } 8�oc IE P{ut>.T Ric (The name should be the sante as*appears on plans) Is this an amendment to an approved plan? Yes 0 No 0 Is this a revision or resubmission for review? Yes l( No 0 J Lt (c, 1.j$ -6 County File Number: (to be provided by the County for nein applications) The following are required elements of new applications[from code section 17-401]. For revisions or amendments,please indicate which items are being amended. Signatures must be provided for any submission. 0 A. Signature of the Property Owner for each parcel: (Required with every submission or revision,NOT TO BE SIGNED BY AN AGENT OR CONSULTANT) By signing this application as the owner,I hereby certify that all requirements of these plans and permits will be complied with,and I have the authority to authorize the land disturbing activities and development on the subject property. I hereby grant the County of Albemarle the right to enter upon the property as required to ensure compliance with the approved plans and permits. 55t~-OI - Al �', , '� //II/ `e/ Tax Map&Parcel Print Name of Property Owner nature ner 1),9 y y—-- Date Tax Map&Parcel Print Name of Property Owner Signature of Owner Date Tax Map&Parcel Print Name of Property Owner Signature of Owner Date Tax Map&Parcel Print Name of Property Owner Signature of Owner Date Contact htformation for the Owner(s)to receive correspondence: Print Name M rc h I A O Univ i vi Pv perfi e; LLC q Address 100S. eaffieitc-f-vf±, circa° } 6Ai'be j + DC,, t City C.X0 State V iq Zip 22-?I3 2. Daytime Phone(70i) qa — tope E-mail CAC&V3e... co len 7/1/14,Revised:7110/14 Page I oft 1N3Wd0-13A30 AJiNf1WWO° 70 (]3n13O32i 44,00, D B. All Fees [Code section 17-208] For new or modified plans;Total acres proposed to be disturbed Acres to be Total Fee Fee Due with this Fee with Transfer or disturbed Application modification of permit Less than 1 $290 $145 $20 1 and less than 5 $2,700 $1,350 $200 5 and less than 10 $3,400 $1,700 $250 10 and less than 50 $4,500 $2,250 $300 50 and less than $6,100 $3,050 $450 100 100 and more $9,600 $4,800 $700 For(minor)amendments to an approved plan;$200 per review Variances;$150 Mitigation Plan;$150 ❑ C. Registration Statement on the official DEQ form. li D. Erosion and Sediment Control Plan satisfying the requirements of code section 17-402. Ci E. Stormwater Management Plan satisfying the requirements of code section 17-403. O F. Pollution Prevention Plan satisfying the requirements of code section 17-404. ❑ G. Stormwater Pollution Prevention Plan satisfying the requirements of code section 17-405. D H. Mitigation Plan satisfying the requirements of code section 17-406 for any proposed disturbance of stream buffers. D I. Requested Variations or Exceptions as provided in code sections 17-407 and 408. O J. Construction Record Drawings(as-builts)for any existing facilities in the proposal satisfying the requirements of code section 17-422. Provide 2 copies()fall plans and any supporting documents. Professional seals must have original signatures. Additional information if not provided on plans and documents: Name of a Contact Person for coreespondence(usually the plan preparer,consultant or agent) Print Name Cl/r1 C 1,1 I Led be- . • - Address 1iti M vrti C.>;'.-t10 toad City 0181aIrf( esviIte. State \In Zip 2-2.(10 z Daytime Phone 0;14) q7 7 -- 6Z..0 j E-mail a-MLth ja road o.lnusk,. a)vri *When applications and plans are reviewed,but not approved,and a response to comments is not received within 6 months from the date of county comments,the application will be deemed withdrawn. Applications without valid owner's signatures will not be considered valid. FOR OFFICE USE ONLY WPO# Fee Amount$ Date Paid By who? Receipt# Ck# By: 7/1/14,Revised:7/10/14 Page 2 of2 Nod vielf 1N31/11dO13n30 AIINf1WWO0 { 20E /. ®3A13038 LETTER OF TRANSMITTAL Roudabush, Gale & Assoc., Inc. 914 Monticello Road Charlottesville, VA 22902 (434) 977-0205 TO: Glenn Brooks DATE: November 12,2015 County of Albemarle JOB #: 8053 Department of Community Development PROJ: Old Trail Village 401 McIntire Road, Suite 227 Charlottesville, Va. 22902-4596 X Attached Under separate cover via the following items: # of Copies Date Job # 2 11-12-15 8053 Block 12 WPO Pond Routing Computations These are transmitted as checked below: _For approval _For your use _Please return _As requested X Resubmitted w/revisions _Review/Comment _For Bids due Other REMARKS: Glenn, if you have any additional questions or concerns, please do not hesitate to contact me. SIGNED: Christopher C. Mulligan, PE COPY TO: If enclosures are not as noted, kindly notify us at once. Neme woo RECEIVED 22' . COMMUNITY DEVELOPMENT ( 8S ) Actual Pre-Developed Drainage \\ (16S> CI Disturbed Ar ost Developed Drainage 19- 11-28-2014 Asbuilts Forebay AL 21R - " DufferWetPond- 4"WQV and Outfall Ditch 22R Pond Outfall Ditch Subcat Reach on. til Routing Diagram for OT Block 14 Final Wet Pond Prepared by Hewlett-Packard Company, Printed 11/12/2015 HydroCAD®10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 15.300 85 1/8 acre lots, 65% imp, HSG B (7S) 19.250 88 Fallow, bare soil, HSG B/C (16S) 5.900 58 Woods, Good, HSG B/C weighted (8S) 40.450 82 TOTAL AREA WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 3 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment7S: Post Developed Runoff Area=15.300 ac 65.00% Impervious Runoff Depth>1.50" Flow Length=1,300' Tc=15.4 min CN=85 Runoff=31.58 cfs 1.913 af Subcatchment8S: Actual Pre-Developed Runoff Area=5.900 ac 0.00% Impervious Runoff Depth>0.24" Flow Length=975' Tc=21.4 min CN=58 Runoff=0.86 cfs 0.118 af Subcatchment16S: Disturbed Area Runoff Area=19.250 ac 0.00% Impervious Runoff Depth>1.72" Flow Length=745' Tc=17.2 min CN=88 Runoff=42.93 cfs 2.766 af Reach 21 R: Pond Outfall Ditch Avg. Flow Depth=0.40' Max Vel=3.48 fps Inflow=1.65 cfs 1.013 af n=0.035 L=50.0' S=0.0620 '/' Capacity=19.29 cfs Outflow=1.65 cfs 1.012 af Reach 22R: Pond Outfall Ditch Avg. Flow Depth=0.47' Max Vel=2.47 fps Inflow=1.65 cfs 1.012 af n=0.035 L=100.0' S=0.0250 '/' Capacity=12.25 cfs Outflow=1.65 cfs 1.011 af Pond 14P: 11-28-2014Asbuilts Peak Elev=643.10' Storage=117.409 cf Inflow=42.93 cfs 2.766 af Outflow=20.76 cfs 2.610 af Pond 17P: 50 Buffer Wet Pond -4*WQV Peak Elev=647.61' Storage=112.390 cf Inflow=32.43 cfs 1.947 af Primary=1.65 cfs 1.013 af Secondary=0.00 cfs 0.000 af Outflow=1.65 cfs 1.013 af Pond 19P: Forebay Peak Elev=646.61' Storage=14.062 cf Inflow=31.58 cfs 1.913 af Outflow=32.43 cfs 1.947 af Total Runoff Area = 40.450 ac Runoff Volume = 4.797 af Average Runoff Depth = 1.42" 75.41% Pervious = 30.505 ac 24.59% Impervious = 9.945 ac WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 4 Summary for Subcatchment 7S: Post Developed Drainage Sediment Basin Sized to accomodate Runoff = 31.58 cfs @ 12.08 hrs, Volume= 1.913 af, Depth> 1.50" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr Rainfall=3.05" Area (ac) CN Description * 15.300 85 1/8 acre lots, 65% imp, HSG B 5.355 35.00% Pervious Area 9.945 65.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.1 200 0.0400 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 3.68" 1.1 100 0.0100 1.50 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.2 1,000 0.0150 7.64 24.01 Pipe Channel, 24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50' n= 0.015 15.4 1,300 Total Subcatchment 7S: Post Developed Drainage Hydrograph ®Runoff 3a_ 131.58 cfs 32-s- Runoff=31 .58 cfs 30- 28 Type II 24-hr 261: 1-yr Rainfall=3.05" 24= 22- rl Runoff Area=15.300 ac 20- Runoff Volume=1 .913 of P. 3 16� I . LL 16� �� Runoff Depth>1-.50.. 41 14 Flow Length=1,300' 12- Tc,=15.4 min 8= CN=85 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 8S: Actual Pre-Developed Drainage Sediment Basin Sized to accomodate Runoff = 0.86 cfs @ 12.23 hrs, Volume= 0.118 af, Depth> 0.24" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr Rainfall=3.05" Area (ac) CN Description * 5.900 58 Woods, Good, HSG B/C weighted 5.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.3 300 0.0370 0.33 Sheet Flow, Range n= 0.130 P2= 3.68" 6.1 675 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 21.4 975 Total Subcatchment 8S: Actual Pre-Developed Drainage Hydrograph t 0.95_ B Runoff 09'_ . 0.86 cfs 0.85 . Runoff=0.86 cfs 0.8= 0.75 Type II 24-hr 1-yr Rainfall=3.05" 0.65 Runoff �►rea=5.900 ac I w 00 5- , Runoff IlVolume=0.1118 . =. o"f. - _ � Runoff Depth>0.24 04=045Flow Length=975'0330 0...2=- 4 Tc=21.4 m i n025= r fI CN 587 -:0i 1 1I 0 ._ ,„ i 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) A.rr WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff = 42.93 cfs @ 12.09 hrs, Volume= 2.766 af, Depth> 1.72" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr Rainfall=3.05" Area (ac) CN Description * 19.250 88 Fallow, bare soil, HSG B/C 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0.0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68" 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total Subcatchment 16S: Disturbed Area Hydrograph 48J p Runoff a6= - 42.93 cfs 424. Runoff=42.93 cfs 44.4: - 384 Type 1124,h r 36= 34- 1-yr Rainfall=3.05" 32- - 30_" " Runoff Area=19.250 ac 28- 26= x Runoff Volume=2.766 af 3 24 a 22= " Runoff Depth>1 .72" LL 18 plow Length=745' 141 - Tc=17.2 min 10 CN=88 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 7 Summary for Reach 21 R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 0.79" for 1-yr event Inflow = 1.65 cfs @ 13.91 hrs, Volume= 1.013 af Outflow = 1.65 cfs @ 13.92 hrs, Volume= 1.012 af, Atten= 0%, Lag= 0.2 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 3.48 fps, Min. Travel Time= 0.2 min Avg. Velocity = 2.50 fps, Avg. Travel Time= 0.3 min Peak Storage= 24 cf @ 13.92 hrs Average Depth at Peak Storage= 0.40' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 19.29 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 50.0' Slope= 0.0620 '/' Inlet Invert= 635.10', Outlet Invert= 632.00' "�t2 r WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 8 Reach 21R: Pond Outfall Ditch Hydrograph Inflo 1 Ac rf ®Outflow cfs Inflow Area=15.300 ac 165 Inflow=1.65 cfs - Outflow=1.65cfs _ Avg. Flow Depth=0.40' u 1_. Max Ve1=3.48 fps n=0.035 u- - L=50.0' S=0.0620 'I' _ Capacity=19.29 cfs 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 21R: Pond Outfall Ditch Stage-Discharge 1 � 0 Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 9 Stage-Area-Storage for Reach 21R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 635.10 0.0 0 635.62 0.8 41 635.11 0.0 0 635.63 0.8 42 635.12 0.0 0 635.64 0.9 44 635.13 0.0 0 635.65 0.9 45 635.14 0.0 0 635.66 0.9 47 635.15 0.0 0 635.67 1.0 49 635.16 0.0 1 635.68 1.0 50 635.17 0.0 1 635.69 1.0 52 635.18 0.0 1 635.70 1.1 54 635.19 0.0 1 635.71 1.1 56 635.20 0.0 2 635.72 1.2 58 635.21 0.0 2 635.73 1.2 60 635.22 0.0 2 635.74 1.2 61 635.23 0.1 3 635.75 1.3 63 635.24 0.1 3 635.76 1.3 65 635.25 0.1 3 635.77 1.3 67 635.26 0.1 4 635.78 1.4 69 635.27 0.1 4 635.79 1.4 71 635.28 0.1 5 635.80 1.5 74 635.29 0.1 5 635.81 1.5 76 635.30 0.1 6 635.82 1.6 78 635.31 0.1 7 635.83 1.6 80 635.32 0.1 7 635.84 1.6 82 635.33 0.2 8 635.85 1.7 84 635.34 0.2 9 635.86 1.7 87 635.35 0.2 9 635.87 1.8 89 635.36 0.2 10 635.88 1.8 91 635.37 0.2 11 635.89 1.9 94 635.38 0.2 12 635.90 1.9 96 635.39 0.3 13 635.91 2.0 98 635.40 0.3 13 635.92 2.0 101 635.41 0.3 14 635.93 2.1 103 635.42 0.3 15 635.94 2.1 106 635.43 0.3 16 635.95 2.2 108 635.44 0.3 17 635.96 2.2 111 635.45 0.4 18 635.97 2.3 114 635.46 0.4 19 635.98 2.3 116 635.47 0.4 21 635.99 2.4 119 635.48 0.4 22 636.00 2.4 122 635.49 0.5 23 636.01 2.5 124 635.50 0.5 24 636.02 2.5 127 635.51 0.5 25 636.03 2.6 130 635.52 0.5 26 636.04 2.7 133 635.53 0.6 28 636.05 2.7 135 635.54 0.6 29 636.06 2.8 138 635.55 0.6 30 636.07 2.8 141 635.56 0.6 32 636.08 2.9 144 635.57 0.7 33 636.09 2.9 147 635.58 0.7 35 636.10 3.0 150 635.59 0.7 36 635.60 0.8 38 635.61 0.8 39 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard CompanyPrinted 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 10 Summary for Reach 22R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 0.79" for 1-yr event Inflow = 1.65 cfs @ 13.92 hrs, Volume= 1.012 af Outflow = 1.65 cfs @ 13.92 hrs, Volume= 1.011 af, Atten= 0%, Lag= 0.5 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 2.47 fps, Min. Travel Time= 0.7 min Avg. Velocity = 1.77 fps, Avg. Travel Time= 0.9 min Peak Storage= 67 cf @ 13.92 hrs Average Depth at Peak Storage= 0.47' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 12.25 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 100.0' Slope= 0.02507' Inlet Invert= 632.00', Outlet Invert= 629.50' • WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 11 Reach 22R: Pond Outfall Ditch Hydrograph / 1 F,ri rf IIIInflow Inflow Area=15.300 ac 1.65 cfs ®outflow Inflow=1.65 cfs Outflow=1.65 cfs Avg. Flow Depth=0.47' y Max Vel=2.47fps n=0.035 - L=100.0' - S=0.0250 '/' Capacity=12.25 cfs 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 22R: Pond Outfall Ditch Stage-Discharge 11-/ 4ft' ®Primary)` D. a _ lr 0 1 2 3 4 5 6 7 8 9 10 11 12 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type II 24-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 12 Stage-Area-Storage for Reach 22R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 632.00 0.0 0 632.52 0.8 81 632.01 0.0 0 632.53 0.8 84 632.02 0.0 0 632.54 0.9 87 632.03 0.0 0 632.55 0.9 91 632.04 0.0 0 632.56 0.9 94 632.05 0.0 1 632.57 1.0 97 632.06 0.0 1 632.58 1.0 101 632.07 0.0 1 632.59 1.0 104 632.08 0.0 2 632.60 1.1 108 632.09 0.0 2 632.61 1.1 112 632.10 0.0 3 632.62 1.2 115 632.11 0.0 4 632.63 1.2 119 632.12 0.0 4 632.64 1.2 123 632.13 0.1 5 632.65 1.3 127 632.14 0.1 6 632.66 1.3 131 632.15 0.1 7 632.67 1.3 135 632.16 0.1 8 632.68 1.4 139 632.17 0.1 9 632.69 1.4 143 632.18 0.1 10 632.70 1.5 147 632.19 0.1 11 632.71 1.5 151 632.20 0.1 12 632.72 1.6 156 632.21 0.1 13 632.73 1.6 160 632.22 0.1 15 632.74 1.6 164 632.23 0.2 16 632.75 1.7 169 632.24 0.2 17 632.76 1.7 173 632.25 0.2 19 632.77 1.8 178 632.26 0.2 20 632.78 1.8 183 632.27 0.2 22 632.79 1.9 187 632.28 0.2 24 632.80 1.9 192 632.29 0.3 25 632.81 2.0 197 632.30 0.3 27 632.82 2.0 202 632.31 0.3 29 632.83 2.1 207 632.32 0.3 31 632.84 2.1 212 632.33 0.3 33 632.85 2.2 217 632.34 0.3 35 632.86 2.2 222 632.35 0.4 37 632.87 2.3 227 632.36 0.4 39 632.88 2.3 232 632.37 0.4 41 632.89 2.4 238 632.38 0.4 43 632.90 2.4 243 632.39 0.5 46 632.91 2.5 248 632.40 0.5 48 632.92 2.5 254 632.41 0.5 50 632.93 2.6 259 632.42 0.5 53 632.94 2.7 265 632.43 0.6 55 632.95 2.7 271 632.44 0.6 58 632.96 2.8 276 632.45 0.6 61 632.97 2.8 282 632.46 0.6 63 632.98 2.9 288 632.47 0.7 66 632.99 2.9 294 632.48 0.7 69 633.00 3.0 300 632.49 0.7 72 632.50 0.8 75 632.51 0.8 78 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 13 Summary for Pond 14P: 11-28-2014 Asbuilts Inflow Area = 19.250 ac, 0.00% Impervious, Inflow Depth > 1.72" for 1-yr event Inflow = 42.93 cfs @ 12.09 hrs, Volume= 2.766 af Outflow = 20.76 cfs @ 12.29 hrs, Volume= 2.610 af, Atten= 52%, Lag= 11.6 min Primary = 20.76 cfs @ 12.29 hrs, Volume= 2.610 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 641.07' Surf.Area= 19,161 sf Storage= 76,030 cf Peak Elev= 643.10' @ 12.29 hrs Surf.Area= 21,738 sf Storage= 117,409 cf (41,378 cf above start) Plug-Flow detention time= 271.4 min calculated for 0.861 af(31% of inflow) Center-of-Mass det. time= 38.5 min ( 822.5 - 784.1 ) Volume Invert Avail.Storage Storage Description #1 636.50' 209,716 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.50 12,808 0 0 637.00 14,843 6,913 6,913 638.00 15,878 15,361 22,273 639.00 16,936 16,407 38,680 640.00 17,999 17,468 56,148 641.00 19,089 18,544 74,692 642.00 20,111 19,600 94,292 643.00 21,638 20,875 115,166 644.00 22,610 22,124 137,290 645.00 23,611 23,111 160,401 646.00 24,860 24,236 184,636 647.00 25,300 25,080 209,716 Device Routing Invert Outlet Devices #1 Primary 636.11' 24.0" Round Culvert L= 110.0' CMP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 636.11' /635.04' S= 0.0097 '/' Cc= 0.900 n= 0.025 Corrugated metal, Flow Area= 3.14 sf #2 Device 1 641.07' 30.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=20.71 cfs @ 12.29 hrs HW=643.10' (Free Discharge) t-Culvert (Passes 20.71 cfs of 24.21 cfs potential flow) 2=Orifice/Grate (Orifice Controls 20.71 cfs @ 4.85 fps) WPO Pond - Old Trail - Block 122 15f 11 &.3.05 14" OT Block 14 Final Wet Pond Type II 24-hr 1-yr ainall= Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 14 Pond 14P: 11-28-2014 Asbuilts Hydrograph ■Inflow 4 f 42.93 cfs D Primary 46 Inflow ,Area-19.250 ac 44=6 42_ 40- Inflow= 2.93_cfs 36=- Primary--20.i6 cfs ! 34 32_ 30=r Peak Elev=643.1!0' ' 28; 26- 3 24= Storage--1171409409 cf 20.76 cfs 0 22= - 20 . 18= �, 16= 12= 6 410 12 15 16 17 5 6 7 8 9 11 13 14 18 19 20 Time (hours) Pond 14P: 11-28-2014 Asbuilts Stage-Discharge 647 0 Primary 646- : � ! 645- 644- 643- � � 642 - " - Orifice/Grate 641 w 640 639 ar 638 637 :0-'<" 0 2 4 6 8 10 12 1 16 18 20 22 24 26 28 30 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 15 Stage-Area-Storage for Pond 14P: 11-28-2014 Asbuilts Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.50 12,808 0 644.30 22,910 144,118 636.65 13,418 1,967 644.45 23,060 147,566 636.80 14,029 4,026 644.60 23,211 151,036 636.95 14,640 6,176 644.75 23,361 154,529 637.10 14,947 8,402 644.90 23,511 158,045 637.25 15,102 10,656 645.05 23,673 161,583 637.40 15,257 12,933 645.20 23,861 165,148 637.55 15,412 15,233 645.35 24,048 168,741 637.70 15,568 17,556 645.50 24,236 172,362 637.85 15,723 19,903 645.65 24,423 176,012 638.00 15,878 22,273 645.80 24,610 179,689 638.15 16,037 24,667 645.95 24,798 183,395 638.30 16,195 27,084 646.10 24,904 187,124 638.45 16,354 29,525 646.25 24,970 190,865 638.60 16,513 31,990 646.40 25,036 194,615 638.75 16,672 34,479 646.55 25,102 198,376 638.90 16,830 36,992 646.70 25,168 202,146 639.05 16,989 39,528 646.85 25,234 205,926 639.20 17,149 42,089 647.00 25,300 209,716 639.35 17,308 44,673 639.50 17,468 47,281 639.65 17,627 49,913 639.80 17,786 52,569 639.95 17,946 55,249 640.10 18,108 57,953 640.25 18,272 60,682 640.40 18,435 63,435 640.55 18,598 66,212 640.70 18,762 69,014 640.85 18,926 71,841 641.00 19,089 74,692 641.15 19,242 77,567 641.30 19,396 80,464 641.45 19,549 83,385 641.60 19,702 86,329 641.75 19,856 89,296 641.90 20,009 92,286 642.05 20,187 95,299 642.20 20,416 98,344 642.35 20,645 101,424 642.50 20,875 104,538 642.65 21,104 107,686 642.80 21,333 110,869 642.95 21,562 114,086 643.10 21,735 117,335 643.25 21,881 120,606 643.40 22,027 123,899 643.55 22,173 127,214 643.70 22,318 130,551 643.85 22,464 133,910 644.00 22,610 137,290 644.15 22,760 140,693 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type II 24-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 16 Summary for Pond 17P: 50 Buffer Wet Pond - 4*WQV Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 1.53" for 1-yr event Inflow = 32.43 cfs @ 12.09 hrs, Volume= 1.947 of Outflow = 1.65 cfs @ 13.91 hrs, Volume= 1.013 af, Atten= 95%, Lag= 109.5 min Primary = 1.65 cfs @ 13.91 hrs, Volume= 1.013 af Secondary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs/2 Starting Elev= 645.00' Surf.Area= 14,148 sf Storage= 59,616 cf Peak Elev= 647.61' @ 13.91 hrs Surf.Area= 24,105 sf Storage= 112,390 cf (52,775 cf above start) Flood Elev= 652.75' Surf.Area= 38,322 sf Storage= 272,428 cf (212,813 cf above start) Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= 155.9 min (939.0- 783.1 ) Volume Invert Avail.Storage Storage Description #1 636.00' 282,088 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.00 2,115 0 0 638.00 3,986 6,101 6,101 640.00 5,861 9,847 15,948 642.00 7,877 13,738 29,686 643.00 8,913 8,395 38,081 644.00 10,004 9,459 47,540 645.00 14,148 12,076 59,616 646.00 20,082 17,115 76,731 648.00 25,067 45,149 121,880 650.00 30,518 55,585 177,465 652.00 36,418 66,936 244,401 653.00 38,957 37,688 282,088 Device Routing Invert Outlet Devices #1 Primary 635.64' 36.0" Round Culvert L= 92.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/ Outlet Invert= 635.64' /635.18' S= 0.0050 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 7.07 sf #2 Device 1 645.00' 3.0" Vert. Orifice/Grate X 2.00 columns X 3 rows with 12.0" cc spacing C= 0.600 #3 Device 1 650.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Secondary 651.50' 8.0' long x 18.0' breadth Broad-Crested Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 17 Primary OutFlow Max=1.65 cfs @ 13.91 hrs HW=647.61' (Free Discharge) t =Culvert (Passes 1.65 cfs of 110.15 cfs potential flow) 2=Orifice/Grate (Orifice Controls 1.65 cfs @ 5.61 fps) 3=Orifice/Grate ( Controls 0.00 cfs) econdary OutFlow Max=0.00 cfs @ 5.00 hrs HW=645.03' (Free Discharge) =Broad-Crested Weir ( Controls 0.00 cfs) Pond 17P: 50 Buffer Wet Pond - 4*WQV Hydrograph 32.43 cfs •■inflow El Outflow Inflow Area=15.300 ac ■Se ondary 36 34 Inflow=32.43 cfs 32= 3°= Outflow-=1 .65 cfs 26 Primary=1 .65 cfs 24 Secondary=0.00 cfs 20- IPeak EIev=647.61' 3 18- Storage-=112,390 cf 14_ 12. 10= 8- 1 Rte, rf 6= 1.65 cfs 0.00 cfs 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 18 Pond 17P: 50 Buffer Wet Pond - 4*WQV 61 Tp(rDltriailary Stage-Discharge �/ 653 _ �, is / Secondary 652 -( Broad-Crested Weir" . - -• " Orifice/Grate 651 650 649r 648 !/f 647 F.: 4 Orifice/Grate w 646 a c 645 V '� 644 d 643 , w 642 ''% 641 ' I - - i 640 639 638 ` x- 637 0 20 40 60 80 100 120 140 160 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 19 Stage-Area-Storage for Pond 17P: 50 Buffer Wet Pond - 4*WQV Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.00 2,115 0 646.40 21,079 84,963 636.20 2,302 442 646.60 21,578 89,228 636.40 2,489 921 646.80 22,076 93,594 636.60 2,676 1,437 647.00 22,575 98,059 636.80 2,863 1,991 647.20 23,073 102,624 637.00 3,051 2,583 647.40 23,571 107,288 637.20 3,238 3,212 647.60 24,070 112,052 637.40 3,425 3,878 647.80 24,568 116,916 637.60 3,612 4,581 648.00 25,067 121,880 637.80 3,799 5,323 648.20 25,612 126,947 638.00 3,986 6,101 648.40 26,157 132,124 638.20 4,174 6,917 648.60 26,702 137,410 638.40 4,361 7,770 648.80 27,247 142,805 638.60 4,549 8,661 649.00 27,793 148,309 638.80 4,736 9,590 649.20 28,338 153,922 639.00 4,924 10,556 649.40 28,883 159,644 639.20 5,111 11,559 649.60 29,428 165,475 639.40 5,298 12,600 649.80 29,973 171,415 639.60 5,486 13,679 650.00 30,518 177,465 639.80 5,673 14,795 650.20 31,108 183,627 640.00 5,861 15,948 650.40 31,698 189,908 640.20 6,063 17,140 650.60 32,288 196,306 640.40 6,264 18,373 650.80 32,878 202,823 640.60 6,466 19,646 651.00 33,468 209,458 640.80 6,667 20,959 651.20 34,058 216,210 641.00 6,869 22,313 651.40 34,648 223,081 641.20 7,071 23,707 651.60 35,238 230,069 641.40 7,272 25,141 651.80 35,828 237,176 641.60 7,474 26,616 652.00 36,418 244,401 641.80 7,675 28,131 652.20 36,926 251,735 642.00 7,877 29,686 652.40 37,434 259,171 642.20 8,084 31,282 652.60 37,941 266,708 642.40 8,291 32,920 652.80 38,449 274,347 642.60 8,499 34,599 653.00 38,957 282,088 642.80 8,706 36,319 643.00 8,913 38,081 643.20 9,131 39,885 643.40 9,349 41,733 643.60 9,568 43,625 643.80 9,786 45,561 644.00 10,004 47,540 644.20 10,833 49,623 644.40 11,662 51,873 644.60 12,490 54,288 644.80 13,319 56,869 645.00 14,148 59,616 645.20 15,335 62,564 645.40 16,522 65,749 645.60 17,708 69,172 645.80 18,895 72,833 646.00 20,082 76,731 646.20 20,581 80,797 mow WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 20 Summary for Pond 19P: Forebay Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 1.50" for 1-yr event Inflow = 31.58 cfs @ 12.08 hrs, Volume= 1.913 of Outflow = 32.43 cfs @ 12.09 hrs, Volume= 1.947 af, Atten= 0%, Lag= 0.7 min Primary = 32.43 cfs @ 12.09 hrs, Volume= 1.947 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 645.00' Surf.Area= 3,684 sf Storage= 14,062 cf Peak Elev= 646.61' @ 12.09 hrs Surf.Area= 3,684 sf Storage= 14,062 cf Plug-Flow detention time= 66.3 min calculated for 1.625 af(85% of inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow) Volume Invert Avail.Storage Storage Description #1 638.00' 14,062 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 638.00 608 0 0 640.00 1,290 1,898 1,898 642.00 2,157 3,447 5,345 644.00 3,145 5,302 10,647 645.00 3,684 3,415 14,062 Device Routing Invert Outlet Devices #1 Primary 644.75' 20.0' long x 0.25' rise Sharp-Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=31.62 cfs @ 12.09 hrs HW=646.53' (Free Discharge) 4--1=Sharp-Crested Vee/Trap Weir(Orifice Controls 31.62 cfs @ 6.32 fps) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 21 Pond 19P: Forebay Hydrograph 36-� i - -- ■Inflow ®Primary 34 32.43 cfs Inflow Area=15.300 ac 32= 1.4 30= Inflow=31 .58 cfs 28 26= Primary=32.43 cfs 24- 227. Peak Elev=646.61' Storage--14,062 cf o � a 12- 101/ 8 At { 0 l fi�8cc , 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 19P: Forebay Stage-Discharge � �' Primary 646= 645- ; Sharp-Crested Vee/Trap Weir 644 a 643 642 / w f! 641 640 639 . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1-yr Rainfall=3.05" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 22 Stage-Area-Storage for Pond 19P: Forebay Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 638.00 608 0 643.20 2,750 8,289 638.10 642 63 643.30 2,799 8,567 638.20 676 128 643.40 2,849 8,849 638.30 710 198 643.50 2,898 9,136 638.40 744 270 643.60 2,947 9,429 638.50 779 347 643.70 2,997 9,726 638.60 813 426 643.80 3,046 10,028 638.70 847 509 643.90 3,096 10,335 638.80 881 596 644.00 3,145 10,647 638.90 915 685 644.10 3,199 10,964 639.00 949 779 644.20 3,253 11,287 639.10 983 875 644.30 3,307 11,615 639.20 1,017 975 644.40 3,361 11,948 639.30 1,051 1,079 644.50 3,415 12,287 639.40 1,085 1,185 644.60 3,468 12,631 639.50 1,120 1,296 644.70 3,522 12,981 639.60 1,154 1,409 644.80 3,576 13,335 639.70 1,188 1,526 644.90 3,630 13,696 639.80 1,222 1,647 645.00 3,684 14,062 639.90 1,256 1,771 645.10 3,684 14,062 640.00 1,290 1,898 645.20 3,684 14,062 640.10 1,333 2,029 645.30 3,684 14,062 640.20 1,377 2,165 645.40 3,684 14,062 640.30 1,420 2,305 645.50 3,684 14,062 640.40 1,463 2,449 645.60 3,684 14,062 640.50 1,507 2,597 645.70 3,684 14,062 640.60 1,550 2,750 645.80 3,684 14,062 640.70 1,593 2,907 645.90 3,684 14,062 640.80 1,637 3,069 646.00 3,684 14,062 640.90 1,680 3,235 646.10 3,684 14,062 641.00 1,724 3,405 646.20 3,684 14,062 641.10 1,767 3,579 646.30 3,684 14,062 641.20 1,810 3,758 646.40 3,684 14,062 641.30 1,854 3,941 646.50 3,684 14,062 641.40 1,897 4,129 646.60 3,684 14,062 641.50 1,940 4,321 641.60 1,984 4,517 641.70 2,027 4,717 641.80 2,070 4,922 641.90 2,114 5,131 642.00 2,157 5,345 642.10 2,206 5,563 642.20 2,256 5,786 642.30 2,305 6,014 642.40 2,355 6,247 642.50 2,404 6,485 642.60 2,453 6,728 642.70 2,503 6,976 642.80 2,552 7,229 642.90 2,602 7,486 643.00 2,651 7,749 643.10 2,700 8,017 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 23 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment7S: Post Developed RunoffArea=15.300 ac 65.00% Impervious Runoff Depth>2.02" Flow Length=1,300' Tc=15.4 min CN=85 Runoff=42.23 cfs 2.574 af Subcatchment8S: Actual Pre-Developed Runoff Area=5.900 ac 0.00% Impervious Runoff Depth>0.45" Flow Length=975' Tc=21.4 min CN=58 Runoff=2.23 cfs 0.222 af Subcatchment16S: Disturbed Area Runoff Area=19.250 ac 0.00% Impervious Runoff Depth>2.27" Flow Length=745' Tc=17.2 min CN=88 Runoff=55.93 cfs 3.641 af Reach 21 R: Pond Outfall Ditch Avg. Flow Depth=0.44' Max Vel=3.69 fps Inflow=2.10 cfs 1.344 af n=0.035 L=50.0' S=0.0620'/' Capacity=19.29 cfs Outflow=2.10 cfs 1.344 af Reach 22R: Pond Outfall Ditch Avg. Flow Depth=0.52' Max Vel=2.63 fps Inflow=2.10 cfs 1.344 af n=0.035 L=100.0' S=0.0250 '/' Capacity=12.25 cfs Outflow=2.10 cfs 1.342 af Pond 14P: 11-28-2014Asbuilts Peak Elev=643.64' Storage=129.140 cf Inflow=55.93 cfs 3.641 af Outflow=25.26 cfs 3.468 af Pond 17P: 50 Buffer Wet Pond -4*WQV Peak Elev=648.39' Storage=131.840 cf Inflow=42.99 cfs 2.607 af Primary=2.10 cfs 1.344 af Secondary=0.00 cfs 0.000 af Outflow=2.10 cfs 1.344 af Pond 19P: Forebay Peak Elev=647.93' Storage=14.062 cf Inflow=42.23 cfs 2.574 af Outflow=42.99 cfs 2.607 af Total Runoff Area = 40.450 ac Runoff Volume = 6.437 af Average Runoff Depth = 1.91" 75.41% Pervious = 30.505 ac 24.59% Impervious = 9.945 ac WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 24 Summary for Subcatchment 7S: Post Developed Drainage Sediment Basin Sized to accomodate Runoff = 42.23 cfs @ 12.07 hrs, Volume= 2.574 af, Depth> 2.02" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2-yr Rainfall=3.69" Area (ac) CN Description * 15.300 85 1/8 acre lots, 65% imp, HSG B 5.355 35.00% Pervious Area 9.945 65.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.1 200 0.0400 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 3.68" 1.1 100 0.0100 1.50 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.2 1,000 0.0150 7.64 24.01 Pipe Channel, 24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50' n= 0.015 15.4 1,300 Total Subcatchment 7S: Post Developed Drainage Hydrograph 46= 0 Runoffs 44, 42.23 cfs 42= k-'41Runoff=42.23 cfs 40_ r _ 38= Type 1124=h r 36= 34 2-yr Rainfall=3.69" 32- 30- I Runoff Area=15.300 ac 26= 26 Runoff Volume=2.574 af Runoff Depth >2.02" z2 >2.02" LL 203 /_ 18= 1 Flow w Length=1,300' 14t I Fi Tc=15.4 min 103 CN=85 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 25 Summary for Subcatchment 8S: Actual Pre-Developed Drainage Sediment Basin Sized to accomodate Runoff = 2.23 cfs @ 12.20 hrs, Volume= 0.222 af, Depth> 0.45" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 2-yr Rainfall=3.69" Area (ac) CN Description * 5.900 58 Woods, Good, HSG B/C weighted 5.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.3 300 0.0370 0.33 Sheet Flow, Range n= 0.130 P2= 3.68" 6.1 675 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 21.4 975 Total Subcatchment 8S: Actual Pre-Developed Drainage Hydrograph 9 Runoff 2.23 cfs Ru n off=2.23 cfs 2- Type 1124-h r 2-yr Rainfall=3.69" Runoff Area=5.900 ac Runoff Volume=0.222 af Runoff Depth>0.45" 1- Flow Length=975' Tc=21.4 m i n CN=58 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) MIS 1. WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 26 Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff = 55.93 cfs @ 12.09 hrs, Volume= 3.641 af, Depth> 2.27" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type Il 24-hr 2-yr Rainfall=3.69" Area (ac) CN Description * 19.250 88 Fallow, bare soil, HSG B/C 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0.0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68" 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total Subcatchment 16S: Disturbed Area Hydrograph 607 55.93 cfs D Runoff 55- Ru r off=55:93 cfs 50-_ Type II 24-hr 4572-yr Rainfall=3.69" 40= Runoff Area=19.250 ac_ w 35- Runoff Volume=3.641 ,af LL 3 Runoff Depth>2.27" 25- Flovv Length=745' 20- Tc=17.2 min 15 CN=88 1o� � 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 27 Summary for Reach 21 R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 1.05" for 2-yr event Inflow = 2.10 cfs @ 13.93 hrs, Volume= 1.344 of Outflow = 2.10 cfs @ 13.93 hrs, Volume= 1.344 af, Atten= 0%, Lag= 0.1 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 3.69 fps, Min. Travel Time= 0.2 min Avg. Velocity = 2.68 fps, Avg. Travel Time= 0.3 min Peak Storage= 28 cf @ 13.93 hrs Average Depth at Peak Storage= 0.44' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 19.29 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 50.0' Slope= 0.0620 '/' Inlet Invert= 635.10', Outlet Invert= 632.00' ,ham - arr. WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 28 Reach 21R: Pond Outfall Ditch Hydrograph ■Inflow I 9 in rf D Outflow Inflow Area=15.300 ac ?moo cfs 2- Inflow=2.10 cfs Outflow=2.10,cfs Avg. Flow Depth=0.44 - Max VIel=3.69fps 3 n=0.035 o LL 1- L=50.0' S-=0.0620 '/' Capacity=19.29 cfs 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 21 R: Pond Outfall Ditch Stage-Discharge Primary w f 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 29 Stage-Area-Storage for Reach 21R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 635.10 0.0 0 635.62 0.8 41 635.11 0.0 0 635.63 0.8 42 635.12 0.0 0 635.64 0.9 44 635.13 0.0 0 635.65 0.9 45 635.14 0.0 0 635.66 0.9 47 635.15 0.0 0 635.67 1.0 49 635.16 0.0 1 635.68 1.0 50 635.17 0.0 1 635.69 1.0 52 635.18 0.0 1 635.70 1.1 54 635.19 0.0 1 635.71 1.1 56 635.20 0.0 2 635.72 1.2 58 635.21 0.0 2 635.73 1.2 60 635.22 0.0 2 635.74 1.2 61 635.23 0.1 3 635.75 1.3 63 635.24 0.1 3 635.76 1.3 65 635.25 0.1 3 635.77 1.3 67 635.26 0.1 4 635.78 1.4 69 635.27 0.1 4 635.79 1.4 71 635.28 0.1 5 635.80 1.5 74 635.29 0.1 5 635.81 1.5 76 635.30 0.1 6 635.82 1.6 78 635.31 0.1 7 635.83 1.6 80 635.32 0.1 7 635.84 1.6 82 635.33 0.2 8 635.85 1.7 84 635.34 0.2 9 635.86 1.7 87 635.35 0.2 9 635.87 1.8 89 635.36 0.2 10 635.88 1.8 91 635.37 0.2 11 635.89 1.9 94 635.38 0.2 12 635.90 1.9 96 635.39 0.3 13 635.91 2.0 98 635.40 0.3 13 635.92 2.0 101 635.41 0.3 14 635.93 2.1 103 635.42 0.3 15 635.94 2.1 106 635.43 0.3 16 635.95 2.2 108 635.44 0.3 17 635.96 2.2 111 635.45 0.4 18 635.97 2.3 114 635.46 0.4 19 635.98 2.3 116 635.47 0.4 21 635.99 2.4 119 635.48 0.4 22 636.00 2.4 122 635.49 0.5 23 636.01 2.5 124 635.50 0.5 24 636.02 2.5 127 635.51 0.5 25 636.03 2.6 130 635.52 0.5 26 636.04 2.7 133 635.53 0.6 28 636.05 2.7 135 635.54 0.6 29 636.06 2.8 138 635.55 0.6 30 636.07 2.8 141 635.56 0.6 32 636.08 2.9 144 635.57 0.7 33 636.09 2.9 147 635.58 0.7 35 636.10 3.0 150 635.59 0.7 36 635.60 0.8 38 635.61 0.8 39 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 30 Summary for Reach 22R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 1.05" for 2-yr event Inflow = 2.10 cfs @ 13.93 hrs, Volume= 1.344 of Outflow = 2.10 cfs @ 13.94 hrs, Volume= 1.342 af, Atten= 0%, Lag= 0.6 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 2.63 fps, Min. Travel Time= 0.6 min Avg. Velocity = 1.91 fps, Avg. Travel Time= 0.9 min Peak Storage= 80 cf @ 13.94 hrs Average Depth at Peak Storage= 0.52' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 12.25 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 100.0' Slope= 0.0250 '1 Inlet Invert= 632.00', Outlet Invert= 629.50' • WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 31 Reach 22R: Pond Outfall Ditch Hydrograph ■Inflow Outflow Inflow Area=15.300 ac 210 cfs 2 Inflow=2.10 cfs 4 Outflow=2.10,cfs Avg. Flow Depth=0.52 - Max Vel=2.63 fps g n=0.035 LL 1- L=100.0' " S=0.0250 '/' Capacity=12.25 cfs o 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 22R: Pond Outfall Ditch Stage-Discharge ®Primary _ J / 0 1 2 4 5 6 7 8 9 10 11 12 Discharge (cfs) I WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 32 Stage-Area-Storage for Reach 22R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 632.00 0.0 0 632.52 0.8 81 632.01 0.0 0 632.53 0.8 84 632.02 0.0 0 632.54 0.9 87 632.03 0.0 0 632.55 0.9 91 632.04 0.0 0 632.56 0.9 94 632.05 0.0 1 632.57 1.0 97 632.06 0.0 1 632.58 1.0 101 632.07 0.0 1 632.59 1.0 104 632.08 0.0 2 632.60 1.1 108 632.09 0.0 2 632.61 1.1 112 632.10 0.0 3 632.62 1.2 115 632.11 0.0 4 632.63 1.2 119 632.12 0.0 4 632.64 1.2 123 632.13 0.1 5 632.65 1.3 127 632.14 0.1 6 632.66 1.3 131 632.15 0.1 7 632.67 1.3 135 632.16 0.1 8 632.68 1.4 139 632.17 0.1 9 632.69 1.4 143 632.18 0.1 10 632.70 1.5 147 632.19 0.1 11 632.71 1.5 151 632.20 0.1 12 632.72 1.6 156 632.21 0.1 13 632.73 1.6 160 632.22 0.1 15 632.74 1.6 164 632.23 0.2 16 632.75 1.7 169 632.24 0.2 17 632.76 1.7 173 632.25 0.2 19 632.77 1.8 178 632.26 0.2 20 632.78 1.8 183 632.27 0.2 22 632.79 1.9 187 632.28 0.2 24 632.80 1.9 192 632.29 0.3 25 632.81 2.0 197 632.30 0.3 27 632.82 2.0 202 632.31 0.3 29 632.83 2.1 207 632.32 0.3 31 632.84 2.1 212 632.33 0.3 33 632.85 2.2 217 632.34 0.3 35 632.86 2.2 222 632.35 0.4 37 632.87 2.3 227 632.36 0.4 39 632.88 2.3 232 632.37 0.4 41 632.89 2.4 238 632.38 0.4 43 632.90 2.4 243 632.39 0.5 46 632.91 2.5 248 632.40 0.5 48 632.92 2.5 254 632.41 0.5 50 632.93 2.6 259 632.42 0.5 53 632.94 2.7 265 632.43 0.6 55 632.95 2.7 271 632.44 0.6 58 632.96 2.8 276 632.45 0.6 61 632.97 2.8 282 632.46 0.6 63 632.98 2.9 288 632.47 0.7 66 632.99 2.9 294 632.48 0.7 69 633.00 3.0 300 632.49 0.7 72 632.50 0.8 75 632.51 0.8 78 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 33 Summary for Pond 14P: 11-28-2014 Asbuilts Inflow Area = 19.250 ac, 0.00% Impervious, Inflow Depth > 2.27" for 2-yr event Inflow = 55.93 cfs @ 12.09 hrs, Volume= 3.641 af Outflow = 25.26 cfs @ 12.30 hrs, Volume= 3.468 af, Atten= 55%, Lag= 12.4 min Primary = 25.26 cfs @ 12.30 hrs, Volume= 3.468 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 641.07' Surf.Area= 19,161 sf Storage= 76,030 cf Peak Elev= 643.64' @ 12.30 hrs Surf.Area= 22,257 sf Storage= 129,140 cf (53,109 cf above start) Plug-Flow detention time= 199.0 min calculated for 1.716 af(47% of inflow) Center-of-Mass det. time= 36.8 min ( 814.6 - 777.9 ) Volume Invert Avail.Storage Storage Description #1 636.50' 209,716 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.50 12,808 0 0 637.00 14,843 6,913 6,913 638.00 15,878 15,361 22,273 639.00 16,936 16,407 38,680 640.00 17,999 17,468 56,148 641.00 19,089 18,544 74,692 642.00 20,111 19,600 94,292 643.00 21,638 20,875 115,166 644.00 22,610 22,124 137,290 645.00 23,611 23,111 160,401 646.00 24,860 24,236 184,636 647.00 25,300 25,080 209,716 Device Routing Invert Outlet Devices #1 Primary 636.11' 24.0" Round Culvert L= 110.0' CMP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 636.11' /635.04' S= 0.0097 '/' Cc= 0.900 n= 0.025 Corrugated metal, Flow Area= 3.14 sf #2 Device 1 641.07' 30.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=25.26 cfs @ 12.30 hrs HW=643.64' (Free Discharge) LlCulvert (Barrel Controls 25.26 cfs @ 8.04 fps) 2=Orifice/Grate (Passes 25.26 cfs of 27.12 cfs potential flow) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 34 Pond 14P: 11-28-2014 Asbuilts Hydrograph ®Inflow 55.93 cfs o Primary 60= Inflow Area=19.250 ac 507 55- Inflow--55.93 cfs 457 Primary=25.26 cfs 40= Peak EIev=643.64' 357 Storage=129,140 cf 0 30= 25.26 cfs 25 � 20 15- ° 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 14P: 11-28-2014 Asbuilts Stage-Discharge 647_ D Primary 646 645-_- 644-: .� i ��`� -x�� 643 � a 642- , � Orifice/Grate, 0.3 641 640 639 638 637 i 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 35 Stage-Area-Storage for Pond 14P: 11-28-2014 Asbuilts Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.50 12,808 0 644.30 22,910 144,118 636.65 13,418 1,967 644.45 23,060 147,566 636.80 14,029 4,026 644.60 23,211 151,036 636.95 14,640 6,176 644.75 23,361 154,529 637.10 14,947 8,402 644.90 23,511 158,045 637.25 15,102 10,656 645.05 23,673 161,583 637.40 15,257 12,933 645.20 23,861 165,148 637.55 15,412 15,233 645.35 24,048 168,741 637.70 15,568 17,556 645.50 24,236 172,362 637.85 15,723 19,903 645.65 24,423 176,012 638.00 15,878 22,273 645.80 24,610 179,689 638.15 16,037 24,667 645.95 24,798 183,395 638.30 16,195 27,084 646.10 24,904 187,124 638.45 16,354 29,525 646.25 24,970 190,865 638.60 16,513 31,990 646.40 25,036 194,615 638.75 16,672 34,479 646.55 25,102 198,376 638.90 16,830 36,992 646.70 25,168 202,146 639.05 16,989 39,528 646.85 25,234 205,926 639.20 17,149 42,089 647.00 25,300 209,716 639.35 17,308 44,673 639.50 17,468 47,281 639.65 17,627 49,913 639.80 17,786 52,569 639.95 17,946 55,249 640.10 18,108 57,953 640.25 18,272 60,682 640.40 18,435 63,435 640.55 18,598 66,212 640.70 18,762 69,014 640.85 18,926 71,841 641.00 19,089 74,692 641.15 19,242 77,567 641.30 19,396 80,464 641.45 19,549 83,385 641.60 19,702 86,329 641.75 19,856 89,296 641.90 20,009 92,286 642.05 20,187 95,299 642.20 20,416 98,344 642.35 20,645 101,424 642.50 20,875 104,538 642.65 21,104 107,686 642.80 21,333 110,869 642.95 21,562 114,086 643.10 21,735 117,335 643.25 21,881 120,606 643.40 22,027 123,899 643.55 22,173 127,214 643.70 22,318 130,551 643.85 22,464 133,910 644.00 22,610 137,290 644.15 22,760 140,693 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 36 Summary for Pond 17P: 50 Buffer Wet Pond - 4*WQV Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 2.05" for 2-yr event Inflow = 42.99 cfs @ 12.06 hrs, Volume= 2.607 af Outflow = 2.10 cfs @ 13.93 hrs, Volume= 1.344 af, Atten= 95%, Lag= 112.1 min Primary = 2.10 cfs @ 13.93 hrs, Volume= 1.344 af Secondary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs/2 Starting Elev= 645.00' Surf.Area= 14,148 sf Storage= 59,616 cf Peak Elev= 648.39' @ 13.93 hrs Surf.Area= 26,128 sf Storage= 131,840 cf (72,224 cf above start) Flood Elev= 652.75' Surf.Area= 38,322 sf Storage= 272,428 cf (212,813 cf above start) Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= 162.7 min ( 941.8 - 779.1 ) Volume Invert Avail.Storage Storage Description #1 636.00' 282,088 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.00 2,115 0 0 638.00 3,986 6,101 6,101 640.00 5,861 9,847 15,948 642.00 7,877 13,738 29,686 643.00 8,913 8,395 38,081 644.00 10,004 9,459 47,540 645.00 14,148 12,076 59,616 646.00 20,082 17,115 76,731 648.00 25,067 45,149 121,880 650.00 30,518 55,585 177,465 652.00 36,418 66,936 244,401 653.00 38,957 37,688 282,088 Device Routing Invert Outlet Devices #1 Primary 635.64' 36.0" Round Culvert L= 92.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/Outlet Invert= 635.64' /635.18' S= 0.0050 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 7.07 sf #2 Device 1 645.00' 3.0" Vert. Orifice/Grate X 2.00 columns X 3 rows with 12.0" cc spacing C= 0.600 #3 Device 1 650.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Secondary 651.50' 8.0' long x 18.0' breadth Broad-Crested Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 37 Primary OutFlow Max=2.10 cfs @ 13.93 hrs HW=648.39' (Free Discharge) 4- -Culvert (Passes 2.10 cfs of 114.15 cfs potential flow) 2=Orifice/Grate (Orifice Controls 2.10 cfs @ 7.12 fps) 3=Orifice/Grate ( Controls 0.00 cfs) econdary OutFlow Max=0.00 cfs @ 5.00 hrs HW=645.03' (Free Discharge) 7-4=Broad-Crested Weir ( Controls 0.00 cfs) Pond 17P: 50 Buffer Wet Pond - 4*WQV Hydrograph 42.99III Inflow cfs El Outflow Inflow Area=15.300 ac ®Se ondary 45 Inflow=42.99 cfs 407 Outflow=2.10 cfs 357 ! Primary=2.10 cfs 307 Secondary=0.00 cfs 3 25- Peak Elev=648.39' LL 20- Storage=131 ,840 cf 15, 10_ 9 in rf _ 2.10 cfs 0.00 cfs 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) A. WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 38 Pond 17P: 50 Buffer Wet Pond - 4*WQV Stage-Discharge err 653 Secondary 652 —ter' Broad-Crested Weir +' g .1. '--' _ -.,>-4 Orifice Grate 651 r 650 649 648 rir 647 w 646 l Orifice/Grate w f 645 t � 47, 644 v 643 -f 642 641 640 639 638 637 . , , , , , . . . , , . . , , . , , 0 20 40 60 80 100 120 140 160 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 39 Stage-Area-Storage for Pond 17P: 50 Buffer Wet Pond - 4*WQV Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.00 2,115 0 646.40 21,079 84,963 636.20 2,302 442 646.60 21,578 89,228 636.40 2,489 921 646.80 22,076 93,594 636.60 2,676 1,437 647.00 22,575 98,059 636.80 2,863 1,991 647.20 23,073 102,624 637.00 3,051 2,583 647.40 23,571 107,288 637.20 3,238 3,212 647.60 24,070 112,052 637.40 3,425 3,878 647.80 24,568 116,916 637.60 3,612 4,581 648.00 25,067 121,880 637.80 3,799 5,323 648.20 25,612 126,947 638.00 3,986 6,101 648.40 26,157 132,124 638.20 4,174 6,917 648.60 26,702 137,410 638.40 4,361 7,770 648.80 27,247 142,805 638.60 4,549 8,661 649.00 27,793 148,309 638.80 4,736 9,590 649.20 28,338 153,922 639.00 4,924 10,556 649.40 28,883 159,644 639.20 5,111 11,559 649.60 29,428 165,475 639.40 5,298 12,600 649.80 29,973 171,415 639.60 5,486 13,679 650.00 30,518 177,465 639.80 5,673 14,795 650.20 31,108 183,627 640.00 5,861 15,948 650.40 31,698 189,908 640.20 6,063 17,140 650.60 32,288 196,306 640.40 6,264 18,373 650.80 32,878 202,823 640.60 6,466 19,646 651.00 33,468 209,458 640.80 6,667 20,959 651.20 34,058 216,210 641.00 6,869 22,313 651.40 34,648 223,081 641.20 7,071 23,707 651.60 35,238 230,069 641.40 7,272 25,141 651.80 35,828 237,176 641.60 7,474 26,616 652.00 36,418 244,401 641.80 7,675 28,131 652.20 36,926 251,735 642.00 7,877 29,686 652.40 37,434 259,171 642.20 8,084 31,282 652.60 37,941 266,708 642.40 8,291 32,920 652.80 38,449 274,347 642.60 8,499 34,599 653.00 38,957 282,088 642.80 8,706 36,319 643.00 8,913 38,081 643.20 9,131 39,885 643.40 9,349 41,733 643.60 9,568 43,625 643.80 9,786 45,561 644.00 10,004 47,540 644.20 10,833 49,623 644.40 11,662 51,873 644.60 12,490 54,288 644.80 13,319 56,869 645.00 14,148 59,616 645.20 15,335 62,564 645.40 16,522 65,749 645.60 17,708 69,172 645.80 18,895 72,833 646.00 20,082 76,731 646.20 20,581 80,797 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 40 Summary for Pond 19P: Forebay Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 2.02" for 2-yr event Inflow = 42.23 cfs @ 12.07 hrs, Volume= 2.574 af Outflow = 42.99 cfs @ 12.06 hrs, Volume= 2.607 af, Atten= 0%, Lag= 0.0 min Primary = 42.99 cfs @ 12.06 hrs, Volume= 2.607 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 645.00' Surf.Area= 3,684 sf Storage= 14,062 cf Peak Elev= 647.93' @ 12.06 hrs Surf.Area= 3,684 sf Storage= 14,062 cf Plug-Flow detention time= 54.0 min calculated for 2.277 af(88% of inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow) Volume Invert Avail.Storage Storage Description #1 638.00' 14,062 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 638.00 608 0 0 640.00 1,290 1,898 1,898 642.00 2,157 3,447 5,345 644.00 3,145 5,302 10,647 645.00 3,684 3,415 14,062 Device Routing Invert Outlet Devices #1 Primary 644.75' 20.0' long x 0.25' rise Sharp-Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=41.90 cfs @ 12.06 hrs HW=647.79' (Free Discharge) t-1=Sharp-Crested Vee/Trap Weir(Orifice Controls 41.90 cfs @ 8.38 fps) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 41 Pond 19P: Forebay Hydrograph 48 ■Inflow 46= S 0 Primary 44= 42.99 cfs Inflow Area=15.300 ac 42-; 40= ., i Iniflow=42.23 cfs 34= Primary=42.99 cfs 32- 30t t Peak Iev=647.93' 28= 13 26- Storage=14,062 cf 24- c 22." LL 20= ; 18 163 " r 14 f 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 19P: Forebay Stage-Discharge Primary' 647 646 645- ' Sharp Crested VeeITrap Weir Fr, 644 c 643 f w 642 641 640 639 orf , 0 5 10 15 20 25 30 35 40 Discharge (cfs) aisioxisiesimmai WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 2-yr Rainfall=3.69" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 42 Stage-Area-Storage for Pond 19P: Forebay Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 638.00 608 0 643.20 2,750 8,289 638.10 642 63 643.30 2,799 8,567 638.20 676 128 643.40 2,849 8,849 638.30 710 198 643.50 2,898 9,136 638.40 744 270 643.60 2,947 9,429 638.50 779 347 643.70 2,997 9,726 638.60 813 426 643.80 3,046 10,028 638.70 847 509 643.90 3,096 10,335 638.80 881 596 644.00 3,145 10,647 638.90 915 685 644.10 3,199 10,964 639.00 949 779 644.20 3,253 11,287 639.10 983 875 644.30 3,307 11,615 639.20 1,017 975 644.40 3,361 11,948 639.30 1,051 1,079 644.50 3,415 12,287 639.40 1,085 1,185 644.60 3,468 12,631 639.50 1,120 1,296 644.70 3,522 12,981 639.60 1,154 1,409 644.80 3,576 13,335 639.70 1,188 1,526 644.90 3,630 13,696 639.80 1,222 1,647 645.00 3,684 14,062 639.90 1,256 1,771 645.10 3,684 14,062 640.00 1,290 1,898 645.20 3,684 14,062 640.10 1,333 2,029 645.30 3,684 14,062 640.20 1,377 2,165 645.40 3,684 14,062 640.30 1,420 2,305 645.50 3,684 14,062 640.40 1,463 2,449 645.60 3,684 14,062 640.50 1,507 2,597 645.70 3,684 14,062 640.60 1,550 2,750 645.80 3,684 14,062 640.70 1,593 2,907 645.90 3,684 14,062 640.80 1,637 3,069 646.00 3,684 14,062 640.90 1,680 3,235 646.10 3,684 14,062 641.00 1,724 3,405 646.20 3,684 14,062 641.10 1,767 3,579 646.30 3,684 14,062 641.20 1,810 3,758 646.40 3,684 14,062 641.30 1,854 3,941 646.50 3,684 14,062 641.40 1,897 4,129 646.60 3,684 14,062 641.50 1,940 4,321 646.70 3,684 14,062 641.60 1,984 4,517 646.80 3,684 14,062 641.70 2,027 4,717 646.90 3,684 14,062 641.80 2,070 4,922 647.00 3,684 14,062 641.90 2,114 5,131 647.10 3,684 14,062 642.00 2,157 5,345 647.20 3,684 14,062 642.10 2,206 5,563 647.30 3,684 14,062 642.20 2,256 5,786 647.40 3,684 14,062 642.30 2,305 6,014 647.50 3,684 14,062 642.40 2,355 6,247 647.60 3,684 14,062 642.50 2,404 6,485 647.70 3,684 14,062 642.60 2,453 6,728 647.80 3,684 14,062 642.70 2,503 6,976 647.90 3,684 14,062 642.80 2,552 7,229 642.90 2,602 7,486 643.00 2,651 7,749 643.10 2,700 8,017 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 43 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment7S: Post Developed Runoff Area=15.300 ac 65.00% Impervious Runoff Depth>3.64" Flow Length=1,300' Tc=15.4 min CN=85 Runoff=74.40 cfs 4.645 af Subcatchment8S: Actual Pre-Developed Runoff Area=5.900 ac 0.00% Impervious Runoff Depth>1.33" Flow Length=975' Tc=21.4 min CN=58 Runoff=8.53 cfs 0.654 af Subcatchment16S: Disturbed Area Runoff Area=19.250 ac 0.00% Impervious Runoff Depth>3.95" Flow Length=745' Tc=17.2 min CN=88 Runoff=94.62 cfs 6.332 af Reach 21 R: Pond Outfall Ditch Avg. Flow Depth=0.72' Max Vel=5.17 fps Inflow=8.09 cfs 2.390 af n=0.035 L=50.0' S=0.0620 '/' Capacity=19.29 cfs Outflow=8.09 cfs 2.390 af Reach 22R: Pond Outfall Ditch Avg. Flow Depth=0.86' Max Vel=3.68 fps Inflow=8.09 cfs 2.390 af n=0.035 L=100.0' S=0.0250 '/' Capacity=12.25 cfs Outflow=8.09 cfs 2.387 af Pond 14P: 11-28-2014Asbuilts Peak Elev=645.62' Storage=175.306 cf Inflow=94.62 cfs 6.332 af Outflow=28.81 cfs 6.114 of Pond 17P: 50 Buffer Wet Pond -4*WQV Peak EIev=650.21' Storage=183.933 cf Inflow=75.08 cfs 4.678 af Primary=8.09 cfs 2.390 af Secondary=0.00 cfs 0.000 af Outflow=8.09 cfs 2.390 af Pond 19P: Forebay Peak Elev=654.20' Storage=14.062 cf Inflow=74.40 cfs 4.645 af Outflow=75.08 cfs 4.678 af Total Runoff Area =40.450 ac Runoff Volume = 11.631 af Average Runoff Depth = 3.45" 75.41% Pervious = 30.505 ac 24.59% Impervious = 9.945 ac WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 11 24-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 44 Summary for Subcatchment 7S: Post Developed Drainage Sediment Basin Sized to accomodate Runoff = 74.40 cfs @ 12.07 hrs, Volume= 4.645 af, Depth> 3.64" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr Rainfall=5.58" Area (ac) CN Description * 15.300 85 1/8 acre lots, 65% imp, HSG B 5.355 35.00% Pervious Area 9.945 65.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.1 200 0.0400 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 3.68" 1.1 100 0.0100 1.50 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.2 1,000 0.0150 7.64 24.01 Pipe Channel, 24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50' n= 0.015 15.4 1,300 Total Subcatchment 7S: Post Developed Drainage Hydrograph p Runoff 807-. 74.40 cfs 75= Runoff=74.40 cfs 65= 1,t4Type II 24-hr 604 10-yr Rainfall=5.58" 55 iTa Runoff Area=15.300 ac 50 45= Runoff Volume=4,645.af 40- Runoff Depth>3.64" 35= Flow 'Length=1 ,300' 30� 25= Tc=15.4 min 20=.. CN=85 15= 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 45 Summary for Subcatchment 8S: Actual Pre-Developed Drainage Sediment Basin Sized to accomodate Runoff = 8.53 cfs @ 12.17 hrs, Volume= 0.654 af, Depth> 1.33" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr Rainfall=5.58" Area (ac) CN Description * 5.900 58 Woods, Good, HSG B/C weighted 5.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.3 300 0.0370 0.33 Sheet Flow, Range n= 0.130 P2= 3.68" 6.1 675 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 21.4 975 Total Subcatchment 8S: Actual Pre-Developed Drainage Hydrograph 0 s= 8.53 cfs Runoff 4-1 Runoff=8:53 cfs Type II 24-hr 1&-yr Rainfall=5.58" I y 1 11 Runoff Area=5.900 ac 4-1 5_ RunoffVolume=0.654 af RUnoff Depth)'l .33" Ia Flow Length=975' Tc=21:4 min 2 CN=58 • Asommumomm 0 ... 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 46 Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff = 94.62 cfs @ 12.09 hrs, Volume= 6.332 af, Depth> 3.95" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr Rainfall=5.58" Area (ac) CN Description * 19.250 88 Fallow, bare soil, HSG B/C 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0.0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68" 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total Subcatchment 16S: Disturbed Area Hydrograph 105-r: 0 Runoff 100= " I 94.62 cfs 90J Runoff=94.162 cfs 85= I Type II 24-hr ao . Ytfall -5.58" 75 Runoff A ea =19.250 ac 60- ;RunoffVolume=6.1332 af so 45= Runoff Depth>3.95" 40= $ Flow Length=745' 35= Tc=17.2 min C25= 20- N=88 153 r . 5 3 � r,- F,�`s"�:�"i' �"� .iYv` moi: ia+ w ,� 13s..#"A'-• 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 47 Summary for Reach 21 R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 1.87" for 10-yr event Inflow = 8.09 cfs @ 12.70 hrs, Volume= 2.390 af Outflow = 8.09 cfs @ 12.71 hrs, Volume= 2.390 af, Atten= 0%, Lag= 0.2 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 5.17 fps, Min. Travel Time= 0.2 min Avg. Velocity = 3.11 fps, Avg. Travel Time= 0.3 min Peak Storage= 78 cf @ 12.71 hrs Average Depth at Peak Storage= 0.72' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 19.29 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 50.0' Slope= 0.0620 '/' Inlet Invert= 635.10', Outlet Invert= 632.00' WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 48 Reach 21R: Pond Outfall Ditch Hydrograph ■Inflow 9- l R (1CA rf ; 0 Outflow Inflow Area=15.300 a 8.09 cfs $- Inflow=8.09 cfs '= Outflow=8.09 cfs 6- ` Avg. Flow Depth=0.72' • 5= Max Vel=5.17fps -- n=0.035 u.• 4- : L=50. 3- S=0.0620 2= Capacity=19.29 cfs 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 21R: Pond Outfall Ditch Stage-Discharge 1J a ®Primary` I lam/ w v 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 49 Stage-Area-Storage for Reach 21 R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 635.10 0.0 0 635.62 0.8 41 635.11 0.0 0 635.63 0.8 42 635.12 0.0 0 635.64 0.9 44 635.13 0.0 0 635.65 0.9 45 635.14 0.0 0 635.66 0.9 47 635.15 0.0 0 635.67 1.0 49 635.16 0.0 1 635.68 1.0 50 635.17 0.0 1 635.69 1.0 52 635.18 0.0 1 635.70 1.1 54 635.19 0.0 1 635.71 1.1 56 635.20 0.0 2 635.72 1.2 58 635.21 0.0 2 635.73 1.2 60 635.22 0.0 2 635.74 1.2 61 635.23 0.1 3 635.75 1.3 63 635.24 0.1 3 635.76 1.3 65 635.25 0.1 3 635.77 1.3 67 635.26 0.1 4 635.78 1.4 69 635.27 0.1 4 635.79 1.4 71 635.28 0.1 5 635.80 1.5 74 635.29 0.1 5 635.81 1.5 76 635.30 0.1 6 635.82 1.6 78 635.31 0.1 7 635.83 1.6 80 635.32 0.1 7 635.84 1.6 82 635.33 0.2 8 635.85 1.7 84 635.34 0.2 9 635.86 1.7 87 635.35 0.2 9 635.87 1.8 89 635.36 0.2 10 635.88 1.8 91 635.37 0.2 11 635.89 1.9 94 635.38 0.2 12 635.90 1.9 96 635.39 0.3 13 635.91 2.0 98 635.40 0.3 13 635.92 2.0 101 635.41 0.3 14 635.93 2.1 103 635.42 0.3 15 635.94 2.1 106 635.43 0.3 16 635.95 2.2 108 635.44 0.3 17 635.96 2.2 111 635.45 0.4 18 635.97 2.3 114 635.46 0.4 19 635.98 2.3 116 635.47 0.4 21 635.99 2.4 119 635.48 0.4 22 636.00 2.4 122 635.49 0.5 23 636.01 2.5 124 635.50 0.5 24 636.02 2.5 127 635.51 0.5 25 636.03 2.6 130 635.52 0.5 26 636.04 2.7 133 635.53 0.6 28 636.05 2.7 135 635.54 0.6 29 636.06 2.8 138 635.55 0.6 30 636.07 2.8 141 635.56 0.6 32 636.08 2.9 144 635.57 0.7 33 636.09 2.9 147 635.58 0.7 35 636.10 3.0 150 635.59 0.7 36 635.60 0.8 38 635.61 0.8 39 ,ter.. WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 50 Summary for Reach 22R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 1.87" for 10-yr event Inflow = 8.09 cfs @ 12.71 hrs, Volume= 2.390 af Outflow = 8.09 cfs @ 12.71 hrs, Volume= 2.387 af, Atten= 0%, Lag= 0.3 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 3.68 fps, Min. Travel Time= 0.5 min Avg. Velocity= 2.21 fps, Avg. Travel Time= 0.8 min Peak Storage= 220 cf @ 12.71 hrs Average Depth at Peak Storage= 0.86' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 12.25 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '1 Top Width= 6.00' Length= 100.0' Slope= 0.0250 '/' Inlet Invert= 632.00', Outlet Invert= 629.50' WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 51 Reach 22R: Pond Outfall Ditch Hydrograph 9-f R nCi rf ■Inflow 8.09 cfs Outflow Inflow Area=15.300 �.. 8- Inflow=8.09 cfs ;-. Outflow=8.09;cfs 6- Avg. Flow Depth=0.86' w 5- Max Vel=3.68fps 3 = n=0.035 4_ L=100.0' 3_ S=0.0250 '/' 2- Capacity=12.25 cfs 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 22R: Pond Outfall Ditch Stage-Discharge 1 0 Primary II I fi v �f � r I } 10 11 12 Discharge (cfs) AIIIIIIIIIIIIIIk WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 52 Stage-Area-Storage for Reach 22R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 632.00 0.0 0 632.52 0.8 81 632.01 0.0 0 632.53 0.8 84 632.02 0.0 0 632.54 0.9 87 632.03 0.0 0 632.55 0.9 91 632.04 0.0 0 632.56 0.9 94 632.05 0.0 1 632.57 1.0 97 632.06 0.0 1 632.58 1.0 101 632.07 0.0 1 632.59 1.0 104 632.08 0.0 2 632.60 1.1 108 632.09 0.0 2 632.61 1.1 112 632.10 0.0 3 632.62 1.2 115 632.11 0.0 4 632.63 1.2 119 632.12 0.0 4 632.64 1.2 123 632.13 0.1 5 632.65 1.3 127 632.14 0.1 6 632.66 1.3 131 632.15 0.1 7 632.67 1.3 135 632.16 0.1 8 632.68 1.4 139 632.17 0.1 9 632.69 1.4 143 632.18 0.1 10 632.70 1.5 147 632.19 0.1 11 632.71 1.5 151 632.20 0.1 12 632.72 1.6 156 632.21 0.1 13 632.73 1.6 160 632.22 0.1 15 632.74 1.6 164 632.23 0.2 16 632.75 1.7 169 632.24 0.2 17 632.76 1.7 173 632.25 0.2 19 632.77 1.8 178 632.26 0.2 20 632.78 1.8 183 632.27 0.2 22 632.79 1.9 187 632.28 0.2 24 632.80 1.9 192 632.29 0.3 25 632.81 2.0 197 632.30 0.3 27 632.82 2.0 202 632.31 0.3 29 632.83 2.1 207 632.32 0.3 31 632.84 2.1 212 632.33 0.3 33 632.85 2.2 217 632.34 0.3 35 632.86 2.2 222 632.35 0.4 37 632.87 2.3 227 632.36 0.4 39 632.88 2.3 232 632.37 0.4 41 632.89 2.4 238 632.38 0.4 43 632.90 2.4 243 632.39 0.5 46 632.91 2.5 248 632.40 0.5 48 632.92 2.5 254 632.41 0.5 50 632.93 2.6 259 632.42 0.5 53 632.94 2.7 265 632.43 0.6 55 632.95 2.7 271 632.44 0.6 58 632.96 2.8 276 632.45 0.6 61 632.97 2.8 282 632.46 0.6 63 632.98 2.9 288 632.47 0.7 66 632.99 2.9 294 632.48 0.7 69 633.00 3.0 300 632.49 0.7 72 632.50 0.8 75 632.51 0.8 78 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 sin 08126 ©2013 HydroCAD Software Solutions LLC Page 53 Summary for Pond 14P: 11-28-2014 Asbuilts Inflow Area = 19.250 ac, 0.00% Impervious, Inflow Depth > 3.95" for 10-yr event Inflow = 94.62 cfs @ 12.09 hrs, Volume= 6.332 af Outflow = 28.81 cfs @ 12.38 hrs, Volume= 6.114 af, Atten= 70%, Lag= 17.3 min Primary = 28.81 cfs @ 12.38 hrs, Volume= 6.114 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 641.07' Surf.Area= 19,161 sf Storage= 76,030 cf Peak Elev= 645.62' @ 12.38 hrs Surf.Area= 24,387 sf Storage= 175,306 cf (99,276 cf above start) Plug-Flow detention time= 149.4 min calculated for 4.354 af(69% of inflow) Center-of-Mass det. time= 40.8 min ( 805.9 - 765.2 ) Volume Invert Avail.Storage Storage Description #1 636.50' 209,716 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.50 12,808 0 0 637.00 14,843 6,913 6,913 638.00 15,878 15,361 22,273 639.00 16,936 16,407 38,680 640.00 17,999 17,468 56,148 641.00 19,089 18,544 74,692 642.00 20,111 19,600 94,292 643.00 21,638 20,875 115,166 644.00 22,610 22,124 137,290 645.00 23,611 23,111 160,401 646.00 24,860 24,236 184,636 647.00 25,300 25,080 209,716 Device Routing Invert Outlet Devices #1 Primary 636.11' 24.0" Round Culvert L= 110.0' CMP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 636.11' /635.04' S= 0.0097 '/' Cc= 0.900 n= 0.025 Corrugated metal, Flow Area= 3.14 sf #2 Device 1 641.07' 30.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=28.80 cfs @ 12.38 hrs HW=645.62' (Free Discharge) t.Culvert (Barrel Controls 28.80 cfs @ 9.17 fps) 2=Orifice/Grate (Passes 28.80 cfs of 42.91 cfs potential flow) r�.rrr► WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCADO 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 54 Pond 14P: 11-28-2014 Asbuilts Hydrograph ®Inflow 105-/ 94.62 cfs o Primary 195- Inflow,Area=19.250 ac 0- Inflow=94.62 cfs 851- 75= Primary=28.$1 cfs 65 Pe'akElev=645.62' 601 Storage=175,306 cf 55- 0 505 Li- 45= 40= 351 28.81 cfs ' 30 25 20- , 15 10 I %r ' �' :rav "',s1: tq "dt' '.. -•t.; rfr 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 14P: 11-28-2014 Asbuilts Stage-Discharge 647-/ D Primary 646- 645 644 643-: 642- / 42 Orifice/Grate I 641 w 640 639 638 637 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCADO 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 55 Stage-Area-Storage for Pond 14P: 11-28-2014 Asbuilts Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.50 12,808 0 644.30 22,910 144,118 636.65 13,418 1,967 644.45 23,060 147,566 636.80 14,029 4,026 644.60 23,211 151,036 636.95 14,640 6,176 644.75 23,361 154,529 637.10 14,947 8,402 644.90 23,511 158,045 637.25 15,102 10,656 645.05 23,673 161,583 637.40 15,257 12,933 645.20 23,861 165,148 637.55 15,412 15,233 645.35 24,048 168,741 637.70 15,568 17,556 645.50 24,236 172,362 637.85 15,723 19,903 645.65 24,423 176,012 638.00 15,878 22,273 645.80 24,610 179,689 638.15 16,037 24,667 645.95 24,798 183,395 638.30 16,195 27,084 646.10 24,904 187,124 638.45 16,354 29,525 646.25 24,970 190,865 638.60 16,513 31,990 646.40 25,036 194,615 638.75 16,672 34,479 646.55 25,102 198,376 638.90 16,830 36,992 646.70 25,168 202,146 639.05 16,989 39,528 646.85 25,234 205,926 639.20 17,149 42,089 647.00 25,300 209,716 639.35 17,308 44,673 639.50 17,468 47,281 639.65 17,627 49,913 639.80 17,786 52,569 639.95 17,946 55,249 640.10 18,108 57,953 640.25 18,272 60,682 640.40 18,435 63,435 640.55 18,598 66,212 640.70 18,762 69,014 640.85 18,926 71,841 641.00 19,089 74,692 641.15 19,242 77,567 641.30 19,396 80,464 641.45 19,549 83,385 641.60 19,702 86,329 641.75 19,856 89,296 641.90 20,009 92,286 642.05 20,187 95,299 642.20 20,416 98,344 642.35 20,645 101,424 642.50 20,875 104,538 642.65 21,104 107,686 642.80 21,333 110,869 642.95 21,562 114,086 643.10 21,735 117,335 643.25 21,881 120,606 643.40 22,027 123,899 643.55 22,173 127,214 643.70 22,318 130,551 643.85 22,464 133,910 644.00 22,610 137,290 644.15 22,760 140,693 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type II 24-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 56 Summary for Pond 17P: 50 Buffer Wet Pond - 4*WQV Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 3.67" for 10-yr event Inflow = 75.08 cfs @ 12.07 hrs, Volume= 4.678 af Outflow = 8.09 cfs @ 12.70 hrs, Volume= 2.390 af, Atten= 89%, Lag= 38.3 min Primary = 8.09 cfs @ 12.70 hrs, Volume= 2.390 af Secondary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 af Routing by Stor-lnd method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs/2 Starting Elev= 645.00' Surf.Area= 14,148 sf Storage= 59,616 cf Peak Elev= 650.21' @ 12.70 hrs Surf.Area= 31,137 sf Storage= 183,933 cf (124,317 cf above start) Flood Elev= 652.75' Surf.Area= 38,322 sf Storage= 272,428 cf (212,813 cf above start) Plug-Flow detention time= 422.2 min calculated for 1.010 af(22% of inflow) Center-of-Mass det. time= 138.4 min ( 907.0 - 768.7 ) Volume Invert Avail.Storage Storage Description #1 636.00' 282,088 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.00 2,115 0 0 638.00 3,986 6,101 6,101 640.00 5,861 9,847 15,948 642.00 7,877 13,738 29,686 643.00 8,913 8,395 38,081 644.00 10,004 9,459 47,540 645.00 14,148 12,076 59,616 646.00 20,082 17,115 76,731 648.00 25,067 45,149 121,880 650.00 30,518 55,585 177,465 652.00 36,418 66,936 244,401 653.00 38,957 37,688 282,088 Device Routing Invert Outlet Devices #1 Primary 635.64' 36.0" Round Culvert L= 92.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/ Outlet Invert= 635.64' /635.18' S= 0.0050 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 7.07 sf #2 Device 1 645.00' 3.0" Vert. Orifice/Grate X 2.00 columns X 3 rows with 12.0" cc spacing C= 0.600 #3 Device 1 650.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Secondary 651.50' 8.0' long x 18.0' breadth Broad-Crested Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 57 Primary OutFlow Max=7.78 cfs @ 12.70 hrs HW=650.21' (Free Discharge) t =Culvert (Passes 7.78 cfs of 123.04 cfs potential flow) 2=Orifice/Grate (Orifice Controls 2.85 cfs @ 9.68 fps) 3=Orifice/Grate (Weir Controls 4.93 cfs @ 1.50 fps) econdary OutFlow Max=0.00 cfs @ 5.00 hrs HW=645.03' (Free Discharge) =Broad-Crested Weir ( Controls 0.00 cfs) Pond 17P: 50 Buffer Wet Pond - 4*WQV Hydrograph 75.08 cfs IN inflow ./ D Outflow Inflow Area=15.300 ac Se onlid ary 80- 75_ Inflow=75.08 cfs 7 Outflow=8.09 cfs 65= 60 Primary=8.09 cfs 55-E. Secondary=0.00 cfs TA- 50- 13 45 Peak Elev=650.21' 0 40= LL 35- Storage=183,933 cf 30. 25= 20 : II• 8.09 cfs s r ,yr. 0.00 cfs . 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 58 Pond 17P: 50 Buffer Wet Pond - 4*WQV Stage-Discharge rr�r r�M' /1ler 0 Total ..fir'' ,/ Primary 653 _ .A�'! ' � ' . Secondary 652 _.ate'`Broad Crested Weir:" . - Orifice/Grate 651 650 rr 649 I 648 %% fr Orifi 647 '';f ce/Grate w 646 645 , m 644 v643 ' w fA 642 , - 641 640 i'/ 639 I I 638 637 636 0 20 40 60 80 100 120 140 160 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 59 Stage-Area-Storage for Pond 17P: 50 Buffer Wet Pond - 4*WQV Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.00 2,115 0 646.40 21,079 84,963 636.20 2,302 442 646.60 21,578 89,228 636.40 2,489 921 646.80 22,076 93,594 636.60 2,676 1,437 647.00 22,575 98,059 636.80 2,863 1,991 647.20 23,073 102,624 637.00 3,051 2,583 647.40 23,571 107,288 637.20 3,238 3,212 647.60 24,070 112,052 637.40 3,425 3,878 647.80 24,568 116,916 637.60 3,612 4,581 648.00 25,067 121,880 637.80 3,799 5,323 648.20 25,612 126,947 638.00 3,986 6,101 648.40 26,157 132,124 638.20 4,174 6,917 648.60 26,702 137,410 638.40 4,361 7,770 648.80 27,247 142,805 638.60 4,549 8,661 649.00 27,793 148,309 638.80 4,736 9,590 649.20 28,338 153,922 639.00 4,924 10,556 649.40 28,883 159,644 639.20 5,111 11,559 649.60 29,428 165,475 639.40 5,298 12,600 649.80 29,973 171,415 639.60 5,486 13,679 650.00 30,518 177,465 639.80 5,673 14,795 650.20 31,108 183,627 640.00 5,861 15,948 650.40 31,698 189,908 640.20 6,063 17,140 650.60 32,288 196,306 640.40 6,264 18,373 650.80 32,878 202,823 640.60 6,466 19,646 651.00 33,468 209,458 640.80 6,667 20,959 651.20 34,058 216,210 641.00 6,869 22,313 651.40 34,648 223,081 641.20 7,071 23,707 651.60 35,238 230,069 641.40 7,272 25,141 651.80 35,828 237,176 641.60 7,474 26,616 652.00 36,418 244,401 641.80 7,675 28,131 652.20 36,926 251,735 642.00 7,877 29,686 652.40 37,434 259,171 642.20 8,084 31,282 652.60 37,941 266,708 642.40 8,291 32,920 652.80 38,449 274,347 642.60 8,499 34,599 653.00 38,957 282,088 642.80 8,706 36,319 643.00 8,913 38,081 643.20 9,131 39,885 643.40 9,349 41,733 643.60 9,568 43,625 643.80 9,786 45,561 644.00 10,004 47,540 644.20 10,833 49,623 644.40 11,662 51,873 644.60 12,490 54,288 644.80 13,319 56,869 645.00 14,148 59,616 645.20 15,335 62,564 645.40 16,522 65,749 645.60 17,708 69,172 645.80 18,895 72,833 646.00 20,082 76,731 646.20 20,581 80,797 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type II 24-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Pace 60 Summary for Pond 19P: Forebay Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 3.64" for 10-yr event Inflow = 74.40 cfs @ 12.07 hrs, Volume= 4.645 af Outflow = 75.08 cfs @ 12.07 hrs, Volume= 4.678 af, Atten= 0%, Lag= 0.0 min Primary = 75.08 cfs @ 12.07 hrs, Volume= 4.678 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 645.00' Surf.Area= 3,684 sf Storage= 14,062 cf Peak Elev= 654.20' @ 12.06 hrs Surf.Area= 3,684 sf Storage= 14,062 cf Plug-Flow detention time= 38.2 min calculated for 4.341 af(93% of inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow) Volume Invert Avail.Storage Storage Description #1 638.00' 14,062 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 638.00 608 0 0 640.00 1,290 1,898 1,898 642.00 2,157 3,447 5,345 644.00 3,145 5,302 10,647 645.00 3,684 3,415 14,062 Device Routing Invert Outlet Devices #1 Primary 644.75' 20.0' long x 0.25' rise Sharp-Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=73.51 cfs @ 12.07 hrs HW=653.83' (Free Discharge) t-1=Sharp-Crested Vee/Trap Weir(Orifice Controls 73.51 cfs @ 14.70 fps) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 61 Pond 19P: Forebay Hydrograph •Inflow I 7 A All . Primary 75.08 cfs 4 Inflow Areal --15.300 ac Inflow=74.40 cfs 70= 60 Primary=75.08 cfs Peak alev=654.20' 50- Stora e=1 45- ' f g 4,062_cf 0 40' ( . u. 35. 30= 25 201' 15 10 r` 5 -.rte<sS.-�, .. 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 19P: Forebay Stage-Discharge `` 654- Primary1 653-i 651- 650= l° 648= ✓ ,r �• L��., 647- 0 _ Crest d a 645-- �-- +Sha�" Vee/Trap ap Weir / 644 ice, 643 ;f 642 „- 641 l! 640 rl 639 • 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 Discharge (cfs) r WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type II 24-hr 10-yr Rainfall=5.58" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 62 Stage-Area-Storage for Pond 19P: Forebay Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 638.00 608 0 648.40 3,684 14,062 638.20 676 128 648.60 3,684 14,062 638.40 744 270 648.80 3,684 14,062 638.60 813 426 649.00 3,684 14,062 638.80 881 596 649.20 3,684 14,062 639.00 949 779 649.40 3,684 14,062 639.20 1,017 975 649.60 3,684 14,062 639.40 1,085 1,185 649.80 3,684 14,062 639.60 1,154 1,409 650.00 3,684 14,062 639.80 1,222 1,647 650.20 3,684 14,062 640.00 1,290 1,898 650.40 3,684 14,062 640.20 1,377 2,165 650.60 3,684 14,062 640.40 1,463 2,449 650.80 3,684 14,062 640.60 1,550 2,750 651.00 3,684 14,062 640.80 1,637 3,069 651.20 3,684 14,062 641.00 1,724 3,405 651.40 3,684 14,062 641.20 1,810 3,758 651.60 3,684 14,062 641.40 1,897 4,129 651.80 3,684 14,062 641.60 1,984 4,517 652.00 3,684 14,062 641.80 2,070 4,922 652.20 3,684 14,062 642.00 2,157 5,345 652.40 3,684 14,062 642.20 2,256 5,786 652.60 3,684 14,062 642.40 2,355 6,247 652.80 3,684 14,062 642.60 2,453 6,728 653.00 3,684 14,062 642.80 2,552 7,229 653.20 3,684 14,062 643.00 2,651 7,749 653.40 3,684 14,062 643.20 2,750 8,289 653.60 3,684 14,062 643.40 2,849 8,849 653.80 3,684 14,062 643.60 2,947 9,429 654.00 3,684 14,062 643.80 3,046 10,028 644.00 3,145 10,647 644.20 3,253 11,287 644.40 3,361 11,948 644.60 3,468 12,631 644.80 3,576 13,335 645.00 3,684 14,062 645.20 3,684 14,062 645.40 3,684 14,062 645.60 3,684 14,062 645.80 3,684 14,062 646.00 3,684 14,062 646.20 3,684 14,062 646.40 3,684 14,062 646.60 3,684 14,062 646.80 3,684 14,062 647.00 3,684 14,062 647.20 3,684 14,062 647.40 3,684 14,062 647.60 3,684 14,062 647.80 3,684 14,062 648.00 3,684 14,062 648.20 3,684 14,062 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 63 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-lnd method - Pond routing by Stor-Ind method Subcatchment7S: Post Developed Runoff Area=15.300 ac 65.00% Impervious Runoff Depth>5.77" Flow Length=1,300' Tc=15.4 min CN=85 Runoff=114.95 cfs 7.355 af Subcatchment8S: Actual Pre-Developed Runoff Area=5.900 ac 0.00% Impervious Runoff Depth>2.78" Flow Length=975' Tc=21.4 min CN=58 Runoff=18.84 cfs 1.367 af Subcatchment16S: Disturbed Area Runoff Area=19.250 ac 0.00% Impervious Runoff Depth>6.10" Flow Length=745' Tc=17.2 min CN=88 Runoff=142.83 cfs 9.782 af Reach 21R: Pond Outfall Ditch Avg. Flow Depth=1.77' Max Vel=7.71 fps Inflow=58.50 cfs 4.852 af n=0.035 L=50.0' S=0.0620 'I' Capacity=19.29 cfs Outflow=58.68 cfs 4.851 af Reach 22R: Pond Outfall Ditch Avg. Flow Depth=2.43' Max Vel=5.08 fps Inflow=58.68 cfs 4.851 af n=0.035 L=100.0' S=0.0250'/' Capacity=12.25 cfs Outflow=58.60 cfs 4.849 af Pond 14P: 11-28-2014Asbuilts Peak Elev=752.94' Storage=209.716 cf Inflow=142.83 cfs 9.782 af Outflow=107.72 cfs 9.531 af Pond 17P: 50 Buffer Wet Pond -4*WQV Peak EIev=651.05' Storage=211.118 cf Inflow=114.85 cfs 7.389 af Primary=58.50 cfs 4.852 af Secondary=0.00 cfs 0.000 af Outflow=58.50 cfs 4.852 af Pond 19P: Forebay Peak EIev=666.70' Storage=14.062 cf Inflow=114.95 cfs 7.355 af Outflow=114.85 cfs 7.389 af Total Runoff Area = 40.450 ac Runoff Volume = 18.504 af Average Runoff Depth = 5.49" 75.41% Pervious = 30.505 ac 24.59% Impervious = 9.945 ac MMIlk WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 64 Summary for Subcatchment 7S: Post Developed Drainage Sediment Basin Sized to accomodate Runoff = 114.95 cfs @ 12.07 hrs, Volume= 7.355 af, Depth> 5.77" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 50-yr Rainfall=7.95" Area (ac) CN Description * 15.300 85 1/8 acre lots, 65% imp, HSG B 5.355 35.00% Pervious Area 9.945 65.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.1 200 0.0400 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 3.68" 1.1 100 0.0100 1.50 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.2 1,000 0.0150 7.64 24.01 Pipe Channel, 24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50' n= 0.015 15.4 1,300 Total Subcatchment 7S: Post Developed Drainage Hydrograph 125=� Runoff` 114.95 cfs 115 Runoff=114.,95 cfs 110: 105. e - 100= 90 50_50111. RainTykfall=7II24.95hr" 85 Runoff Area=15.300 ac 75- w 70= m =7.35 'of Runoff�Volu e � 60 '*1 Runoff Depth>5.77" u_ 55 45_ Flow Leng` th=1,300' 353 1 Tc 15.4 m i n 30 D N=85 20 1051 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 65 Summary for Subcatchment 8S: Actual Pre-Developed Drainage Sediment Basin Sized to accomodate Runoff = 18.84 cfs @ 12.15 hrs, Volume= 1.367 af, Depth> 2.78" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 50-yr Rainfall=7.95" Area (ac) CN Description * 5.900 58 Woods, Good, HSG B/C weighted 5.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.3 300 0.0370 0.33 Sheet Flow, Range n= 0.130 P2= 3.68" 6.1 675 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 21.4 975 Total Subcatchment 8S: Actual Pre-Developed Drainage Hydrograph 21= 20-] 18.84 cfs Runoff 19" Runoff=18;84 cfs Type II 24-hr y 50- r Rainfall=7.95" 14= 13- Runoff Area=5.900 ac 17i 127; Runoff Volume=1 .367 af • Runoff Depth>2.78" Flow Len th=975' 7- it e 6 Tc=21.4 m i n 5_ CN=58 } 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type II 24-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 66 Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff = 142.83 cfs @ 12.09 hrs, Volume= 9.782 af, Depth> 6.10" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 50-yr Rainfall=7.95" Area (ac) CN Description * 19.250 88 Fallow, bare soil, HSG B/C 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0.0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68" 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total Subcatchment 16S: Disturbed Area Hydrograph Runoff 150: 142.83 cfs ,40 Runoff=142.183_cfs 130_ Type II 24-hr 120: 50-yr Rairifall=7.95" Runoff Area;19.250 ac 908 03 Runoff Volume=9.782 af Runoff Depth>6.10" so_ Flow Length=745' 50= Tc=17'.2 min 40-:, 30= CN=88 � � 20 10 € t'"`my cY,�,tf �„�.��!+��+"� �,`�'3'�ia`,�.4���r�",f•+s' 39�yv�, ��`'�5?P". F' ?` 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 67 Summary for Reach 21R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 3.81" for 50-yr event Inflow = 58.50 cfs @ 12.24 hrs, Volume= 4.852 af Outflow = 58.68 cfs @ 12.24 hrs, Volume= 4.851 af, Atten= 0%, Lag= 0.2 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 7.71 fps, Min. Travel Time= 0.1 min Avg. Velocity = 3.50 fps, Avg. Travel Time= 0.2 min Peak Storage= 380 cf @ 12.24 hrs Average Depth at Peak Storage= 1.77' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 19.29 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 50.0' Slope= 0.0620 '/' Inlet Invert= 635.10', Outlet Invert= 632.00' sf � r 4rir. WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 68 Reach 21R: Pond Outfall Ditch Hydrograph •Inflow II 65- I gR gn rf I', Outflow 60- 58.68 cfs Inflow Area=15.300 ac I 557. Inflow---58.50 ifs 50- 0utflow=58.1168 cfs 45_ Avg. Flow Depth=1.77' 40= Y Max Vel=7.71 fps 35_ n=0.035 30 L=50.0' 25--:. r' 20= i- S=0.0620 '/' 15. Capacity -19:29 cfs 10JL,. ._— _. ' ' 51 1 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 21R: Pond Outfall Ditch Stage-Discharge 1 0 Primary) w 42f, O f 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 69 Stage-Area-Storage for Reach 21 R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 635.10 0.0 0 635.62 0.8 41 635.11 0.0 0 635.63 0.8 42 635.12 0.0 0 635.64 0.9 44 635.13 0.0 0 635.65 0.9 45 635.14 0.0 0 635.66 0.9 47 635.15 0.0 0 635.67 1.0 49 635.16 0.0 1 635.68 1.0 50 635.17 0.0 1 635.69 1.0 52 635.18 0.0 1 635.70 1.1 54 635.19 0.0 1 635.71 1.1 56 635.20 0.0 2 635.72 1.2 58 635.21 0.0 2 635.73 1.2 60 635.22 0.0 2 635.74 1.2 61 635.23 0.1 3 635.75 1.3 63 635.24 0.1 3 635.76 1.3 65 635.25 0.1 3 635.77 1.3 67 635.26 0.1 4 635.78 1.4 69 635.27 0.1 4 635.79 1.4 71 635.28 0.1 5 635.80 1.5 74 635.29 0.1 5 635.81 1.5 76 635.30 0.1 6 635.82 1.6 78 635.31 0.1 7 635.83 1.6 80 635.32 0.1 7 635.84 1.6 82 635.33 0.2 8 635.85 1.7 84 635.34 0.2 9 635.86 1.7 87 635.35 0.2 9 635.87 1.8 89 635.36 0.2 10 635.88 1.8 91 635.37 0.2 11 635.89 1.9 94 635.38 0.2 12 635.90 1.9 96 635.39 0.3 13 635.91 2.0 98 635.40 0.3 13 635.92 2.0 101 635.41 0.3 14 635.93 2.1 103 635.42 0.3 15 635.94 2.1 106 635.43 0.3 16 635.95 2.2 108 635.44 0.3 17 635.96 2.2 111 635.45 0.4 18 635.97 2.3 114 635.46 0.4 19 635.98 2.3 116 635.47 0.4 21 635.99 2.4 119 635.48 0.4 22 636.00 2.4 122 635.49 0.5 23 636.01 2.5 124 635.50 0.5 24 636.02 2.5 127 635.51 0.5 25 636.03 2.6 130 635.52 0.5 26 636.04 2.7 133 635.53 0.6 28 636.05 2.7 135 635.54 0.6 29 636.06 2.8 138 635.55 0.6 30 636.07 2.8 141 635.56 0.6 32 636.08 2.9 144 635.57 0.7 33 636.09 2.9 147 635.58 0.7 35 636.10 3.0 150 635.59 0.7 36 635.60 0.8 38 635.61 0.8 39 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 70 Summary for Reach 22R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 3.81" for 50-yr event Inflow = 58.68 cfs @ 12.24 hrs, Volume= 4.851 af Outflow = 58.60 cfs @ 12.25 hrs, Volume= 4.849 af, Atten= 0%, Lag= 0.3 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 5.08 fps, Min. Travel Time= 0.3 min Avg. Velocity = 2.48 fps, Avg. Travel Time= 0.7 min Peak Storage= 1,154 cf @ 12.25 hrs Average Depth at Peak Storage= 2.43' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 12.25 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 100.0' Slope= 0.0250 '/' Inlet Invert= 632.00', Outlet Invert= 629.50' '1' WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 11 24-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 71 Reach 22R: Pond Outfall Ditch Hydrograph 65 AR FR II InflowII rf ®Outflow 58.60 cfs ( 607 Inflow Area=15.300 'ac 55-_ Inflow=58.68 cfs Outflow=58:60 cfs 45= -. Avg. Flow Depth=2.43' Max VeI=5.08 fps u 35- 3 n=0.0'35 2 30-1 L=100.0' 25- S=0.0250 '/' Capacity=12.25 cfs 15 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 22R: Pond Outfall Ditch Stage-Discharge 1 0 Primary m w r c. 0 , , r , 1 0 1 2 3 4 5 6 7 8 9 10 11 12 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 72 Stage-Area-Storage for Reach 22R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 632.00 0.0 0 632.52 0.8 81 632.01 0.0 0 632.53 0.8 84 632.02 0.0 0 632.54 0.9 87 632.03 0.0 0 632.55 0.9 91 632.04 0.0 0 632.56 0.9 94 632.05 0.0 1 632.57 1.0 97 632.06 0.0 1 632.58 1.0 101 632.07 0.0 1 632.59 1.0 104 632.08 0.0 2 632.60 1.1 108 632.09 0.0 2 632.61 1.1 112 632.10 0.0 3 632.62 1.2 115 632.11 0.0 4 632.63 1.2 119 632.12 0.0 4 632.64 1.2 123 632.13 0.1 5 632.65 1.3 127 632.14 0.1 6 632.66 1.3 131 632.15 0.1 7 632.67 1.3 135 632.16 0.1 8 632.68 1.4 139 632.17 0.1 9 632.69 1.4 143 632.18 0.1 10 632.70 1.5 147 632.19 0.1 11 632.71 1.5 151 632.20 0.1 12 632.72 1.6 156 632.21 0.1 13 632.73 1.6 160 632.22 0.1 15 632.74 1.6 164 632.23 0.2 16 632.75 1.7 169 632.24 0.2 17 632.76 1.7 173 632.25 0.2 19 632.77 1.8 178 632.26 0.2 20 632.78 1.8 183 632.27 0.2 22 632.79 1.9 187 632.28 0.2 24 632.80 1.9 192 632.29 0.3 25 632.81 2.0 197 632.30 0.3 27 632.82 2.0 202 632.31 0.3 29 632.83 2.1 207 632.32 0.3 31 632.84 2.1 212 632.33 0.3 33 632.85 2.2 217 632.34 0.3 35 632.86 2.2 222 632.35 0.4 37 632.87 2.3 227 632.36 0.4 39 632.88 2.3 232 632.37 0.4 41 632.89 2.4 238 632.38 0.4 43 632.90 2.4 243 632.39 0.5 46 632.91 2.5 248 632.40 0.5 48 632.92 2.5 254 632.41 0.5 50 632.93 2.6 259 632.42 0.5 53 632.94 2.7 265 632.43 0.6 55 632.95 2.7 271 632.44 0.6 58 632.96 2.8 276 632.45 0.6 61 632.97 2.8 282 632.46 0.6 63 632.98 2.9 288 632.47 0.7 66 632.99 2.9 294 632.48 0.7 69 633.00 3.0 300 632.49 0.7 72 632.50 0.8 75 632.51 0.8 78 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 73 Summary for Pond 14P: 11-28-2014 Asbuilts Inflow Area = 19.250 ac, 0.00% Impervious, Inflow Depth > 6.10" for 50-yr event Inflow = 142.83 cfs @ 12.09 hrs, Volume= 9.782 af Outflow = 107.72 cfs @ 12.21 hrs, Volume= 9.531 af, Atten= 25%, Lag= 7.5 min Primary = 107.72 cfs @ 12.21 hrs, Volume= 9.531 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 641.07' Surf.Area= 19,161 sf Storage= 76,030 cf Peak Elev= 752.94' @ 12.21 hrs Surf.Area= 25,300 sf Storage= 209,716 cf (133,686 cf above start) Plug-Flow detention time= 130.6 min calculated for 7.784 af(80% of inflow) Center-of-Mass det. time= 41.2 min ( 797.7 - 756.4 ) Volume Invert Avail.Storage Storage Description #1 636.50' 209,716 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.50 12,808 0 0 637.00 14,843 6,913 6,913 638.00 15,878 15,361 22,273 639.00 16,936 16,407 38,680 640.00 17,999 17,468 56,148 641.00 19,089 18,544 74,692 642.00 20,111 19,600 94,292 643.00 21,638 20,875 115,166 644.00 22,610 22,124 137,290 645.00 23,611 23,111 160,401 646.00 24,860 24,236 184,636 647.00 25,300 25,080 209,716 Device Routing Invert Outlet Devices #1 Primary 636.11' 24.0" Round Culvert L= 110.0' CMP, square edge headwall, Ke= 0.500 Inlet/ Outlet Invert= 636.11' /635.04' S= 0.0097 '/' Cc= 0.900 n= 0.025 Corrugated metal, Flow Area= 3.14 sf #2 Device 1 641.07' 30.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=99.11 cfs @ 12.21 hrs HW=738.58' (Free Discharge) t-Culvert (Barrel Controls 99.11 cfs @ 31.55 fps) 2=Orifice/Grate (Passes 99.11 cfs of 231.89 cfs potential flow) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 74 Pond 14P: 11-28-2014 Asbuilts Hydrograph /1 ®Inflow 142.83 cfs p Primary 1507 Inflow''Area=19.2,50 ac 130 Inflow=142.83 cfs 120= 107.72 cfs primary=107.72 cfs 110= : 100- Peak Elev=752.94' _ 9CHStorage=209,716 'cf 80= = o u_ 70= F.�1 60= 50 30-. 20 10 y y ak F 3twaG* 'aw `Y r ,e 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 14P: 11-28-2014 Asbuilts Stage-Discharge 750- o II Primary 745= 740 735= . 730= 725= 720= 715= 710= y 705-i '��'' 700-3 a 695- '74 6907 m 685= w 680. 675 670 665 660: 650i I/ 645 Orifice/Grate 640 0 10 20 30 40 50 60 70 80 90 100 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type ll 24-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 75 Stage-Area-Storage for Pond 14P: 11-28-2014 Asbuilts Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.50 12,808 0 696.30 25,300 209,716 637.65 15,516 16,779 697.45 25,300 209,716 638.80 16,724 35,314 698.60 25,300 209,716 639.95 17,946 55,249 699.75 25,300 209,716 641.10 19,191 76,606 700.90 25,300 209,716 642.25 20,493 99,367 702.05 25,300 209,716 643.40 22,027 123,899 703.20 25,300 209,716 644.55 23,161 149,877 704.35 25,300 209,716 645.70 24,485 177,234 705.50 25,300 209,716 646.85 25,234 205,926 706.65 25,300 209,716 648.00 25,300 209,716 707.80 25,300 209,716 649.15 25,300 209,716 708.95 25,300 209,716 650.30 25,300 209,716 710.10 25,300 209,716 651.45 25,300 209,716 711.25 25,300 209,716 652.60 25,300 209,716 712.40 25,300 209,716 653.75 25,300 209,716 713.55 25,300 209,716 654.90 25,300 209,716 714.70 25,300 209,716 656.05 25,300 209,716 715.85 25,300 209,716 657.20 25,300 209,716 717.00 25,300 209,716 658.35 25,300 209,716 718.15 25,300 209,716 659.50 25,300 209,716 719.30 25,300 209,716 660.65 25,300 209,716 720.45 25,300 209,716 661.80 25,300 209,716 721.60 25,300 209,716 662.95 25,300 209,716 722.75 25,300 209,716 664.10 25,300 209,716 723.90 25,300 209,716 665.25 25,300 209,716 725.05 25,300 209,716 666.40 25,300 209,716 726.20 25,300 209,716 667.55 25,300 209,716 727.35 25,300 209,716 668.70 25,300 209,716 728.50 25,300 209,716 669.85 25,300 209,716 729.65 25,300 209,716 671.00 25,300 209,716 730.80 25,300 209,716 672.15 25,300 209,716 731.95 25,300 209,716 673.30 25,300 209,716 733.10 25,300 209,716 674.45 25,300 209,716 734.25 25,300 209,716 675.60 25,300 209,716 735.40 25,300 209,716 676.75 25,300 209,716 736.55 25,300 209,716 677.90 25,300 209,716 737.70 25,300 209,716 679.05 25,300 209,716 738.85 25,300 209,716 680.20 25,300 209,716 740.00 25,300 209,716 681.35 25,300 209,716 741.15 25,300 209,716 682.50 25,300 209,716 742.30 25,300 209,716 683.65 25,300 209,716 743.45 25,300 209,716 684.80 25,300 209,716 744.60 25,300 209,716 685.95 25,300 209,716 745.75 25,300 209,716 687.10 25,300 209,716 746.90 25,300 209,716 688.25 25,300 209,716 748.05 25,300 209,716 689.40 25,300 209,716 749.20 25,300 209,716 690.55 25,300 209,716 750.35 25,300 209,716 691.70 25,300 209,716 692.85 25,300 209,716 694.00 25,300 209,716 695.15 25,300 209,716 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 76 Summary for Pond 17P: 50 Buffer Wet Pond - 4*WQV Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 5.80" for 50-yr event Inflow = 114.85 cfs @ 12.07 hrs, Volume= 7.389 af Outflow = 58.50 cfs @ 12.24 hrs, Volume= 4.852 af, Atten= 49%, Lag= 10.2 min Primary = 58.50 cfs @ 12.24 hrs, Volume= 4.852 af Secondary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs/2 Starting Elev= 645.00' Surf.Area= 14,148 sf Storage= 59,616 cf Peak Elev= 651.05' @ 12.24 hrs Surf.Area= 33,614 sf Storage= 211,118 cf (151,502 cf above start) Flood Elev= 652.75' Surf.Area= 38,322 sf Storage= 272,428 cf (212,813 cf above start) Plug-Flow detention time= 205.6 min calculated for 3.463 af(47% of inflow) Center-of-Mass det. time= 72.3 min ( 831.9 - 759.6 ) Volume Invert Avail.Storage Storage Description #1 636.00' 282,088 cf Custom Stage Data (Prismatic)Listed below (Recaic) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.00 2,115 0 0 638.00 3,986 6,101 6,101 640.00 5,861 9,847 15,948 642.00 7,877 13,738 29,686 643.00 8,913 8,395 38,081 644.00 10,004 9,459 47,540 645.00 14,148 12,076 59,616 646.00 20,082 17,115 76,731 648.00 25,067 45,149 121,880 650.00 30,518 55,585 177,465 652.00 36,418 66,936 244,401 653.00 38,957 37,688 282,088 Device Routing Invert Outlet Devices #1 Primary 635.64' 36.0" Round Culvert L= 92.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/ Outlet Invert= 635.64' /635.18' S= 0.0050 '1 Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 7.07 sf #2 Device 1 645.00' 3.0" Vert. Orifice/Grate X 2.00 columns X 3 rows with 12.0" cc spacing C= 0.600 #3 Device 1 650.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Secondary 651.50' 8.0' long x 18.0' breadth Broad-Crested Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 77 Primary OutFlow Max=57.84 cfs @ 12.24 hrs HW=651.04' (Free Discharge) t =Culvert (Passes 57.84 cfs of 126.90 cfs potential flow) 2=Orifice/Grate (Orifice Controls 3.13 cfs @ 10.64 fps) 3=Orifice/Grate (Weir Controls 54.70 cfs @ 3.34 fps) Secondary OutFlow Max=0.00 cfs @ 5.00 hrs HW=645.03' (Free Discharge) 4=Broad-Crested Weir ( Controls 0.00 cfs) Pond 17P: 50 Buffer Wet Pond - 4*WQV Hydrograph 114.85 cfs ■Inflow Outflow " Inflow Area=15.300 ac Primary ■Secondary 120 InfloW=114.85 cfs 110= Outflow=58.50 cfs 100 90- Primary=58.50 cfs 80-: cRcn rf Secondary=0.00 cfs 70- 58.50 cfs Peak Elev=651.05` 60= Storage=211,118 cf LL 50. 40= 30. • • 7:e741(01.1rei ret 1:44.01. 0.2 rr.1;077 0.00 cfs 'r 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 78 Pond 17P: 50 Buffer Wet Pond - 4*WQV Stage-Discharge ,ter .F.•/r'������ ®ErPrimary 653 ®Secondary 652Oil Broad Crested Weir r �. Orifice/Grate 651 r ," 650 ,„;),;/<pr � 649 648 , :/' 647 Orifice/Gratea646A c 645 m 644 > 643 ' w 642 641 639 638 f 637 0 20 40 60 80 100 120 140 160 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 79 Stage-Area-Storage for Pond 17P: 50 Buffer Wet Pond -4*WQV Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.00 2,115 0 646.40 21,079 84,963 636.20 2,302 442 646.60 21,578 89,228 636.40 2,489 921 646.80 22,076 93,594 636.60 2,676 1,437 647.00 22,575 98,059 636.80 2,863 1,991 647.20 23,073 102,624 637.00 3,051 2,583 647.40 23,571 107,288 637.20 3,238 3,212 647.60 24,070 112,052 637.40 3,425 3,878 647.80 24,568 116,916 637.60 3,612 4,581 648.00 25,067 121,880 637.80 3,799 5,323 648.20 25,612 126,947 638.00 3,986 6,101 648.40 26,157 132,124 638.20 4,174 6,917 648.60 26,702 137,410 638.40 4,361 7,770 648.80 27,247 142,805 638.60 4,549 8,661 649.00 27,793 148,309 638.80 4,736 9,590 649.20 28,338 153,922 639.00 4,924 10,556 649.40 28,883 159,644 639.20 5,111 11,559 649.60 29,428 165,475 639.40 5,298 12,600 649.80 29,973 171,415 639.60 5,486 13,679 650.00 30,518 177,465 639.80 5,673 14,795 650.20 31,108 183,627 640.00 5,861 15,948 650.40 31,698 189,908 640.20 6,063 17,140 650.60 32,288 196,306 640.40 6,264 18,373 650.80 32,878 202,823 640.60 6,466 19,646 651.00 33,468 209,458 640.80 6,667 20,959 651.20 34,058 216,210 641.00 6,869 22,313 651.40 34,648 223,081 641.20 7,071 23,707 651.60 35,238 230,069 641.40 7,272 25,141 651.80 35,828 237,176 641.60 7,474 26,616 652.00 36,418 244,401 641.80 7,675 28,131 652.20 36,926 251,735 642.00 7,877 29,686 652.40 37,434 259,171 642.20 8,084 31,282 652.60 37,941 266,708 642.40 8,291 32,920 652.80 38,449 274,347 642.60 8,499 34,599 653.00 38,957 282,088 642.80 8,706 36,319 643.00 8,913 38,081 643.20 9,131 39,885 643.40 9,349 41,733 643.60 9,568 43,625 643.80 9,786 45,561 644.00 10,004 47,540 644.20 10,833 49,623 644.40 11,662 51,873 644.60 12,490 54,288 644.80 13,319 56,869 645.00 14,148 59,616 645.20 15,335 62,564 645.40 16,522 65,749 645.60 17,708 69,172 645.80 18,895 72,833 646.00 20,082 76,731 646.20 20,581 80,797 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 80 Summary for Pond 19P: Forebay Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 5.77" for 50-yr event Inflow = 114.95 cfs @ 12.07 hrs, Volume= 7.355 af Outflow = 114.85 cfs @ 12.07 hrs, Volume= 7.389 af, Atten= 0%, Lag= 0.0 min Primary = 114.85 cfs @ 12.07 hrs, Volume= 7.389 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 645.00' Surf.Area= 3,684 sf Storage= 14,062 cf Peak Elev= 666.70' @ 12.07 hrs Surf.Area= 3,684 sf Storage= 14,062 cf Plug-Flow detention time= 28.7 min calculated for 7.066 af(96% of inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow) Volume Invert Avail.Storage Storage Description #1 638.00' 14,062 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 638.00 608 0 0 640.00 1,290 1,898 1,898 642.00 2,157 3,447 5,345 644.00 3,145 5,302 10,647 645.00 3,684 3,415 14,062 Device Routing Invert Outlet Devices #1 Primary 644.75' 20.0' long x 0.25' rise Sharp-Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=112.90 cfs @ 12.07 hrs HW=666.00' (Free Discharge) t-1=Sharp-Crested Vee/Trap Weir(Orifice Controls 112.90 cfs @ 22.58 fps) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 81 Pond 19P: Forebay Hydrograph I 11d. Ac rf ■Inflow ry1 Prima 1202: 114.85 cfs !`InflowiArea=15.300 ac 110= Inflow=114.95 cfs 100= Primary=114.$5 cfs 80- Peak Elev=666.70' 70= IStorage=14,062 cf 0 60-, 50- 40- • m ... 30-' 20 , , , � ��-�.�t � f�a.��xs`ld�.z`,s+',�•`�•: � ��J,S� . . . , 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 19P: Forebay Stage-Discharge 666 ` ®Primary) 664- 662 660- 658- 656- 42 654- 3 652-4 `>' m 650 - , 6487 _ . 646- Sharp-Crested Vse/TraWeir elr: 644 642 f 640 , . . , , , . , , ,/ 0 10 20 30 40 50 60 70 80 90 100 110 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 50-yr Rainfall=7.95" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 82 Stage-Area-Storage for Pond 19P: Forebay Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 638.00 608 0 653.60 3,684 14,062 638.30 710 198 653.90 3,684 14,062 638.60 813 426 654.20 3,684 14,062 638.90 915 685 654.50 3,684 14,062 639.20 1,017 975 654.80 3,684 14,062 639.50 1,120 1,296 655.10 3,684 14,062 639.80 1,222 1,647 655.40 3,684 14,062 640.10 1,333 2,029 655.70 3,684 14,062 640.40 1,463 2,449 656.00 3,684 14,062 640.70 1,593 2,907 656.30 3,684 14,062 641.00 1,724 3,405 656.60 3,684 14,062 641.30 1,854 3,941 656.90 3,684 14,062 641.60 1,984 4,517 657.20 3,684 14,062 641.90 2,114 5,131 657.50 3,684 14,062 642.20 2,256 5,786 657.80 3,684 14,062 642.50 2,404 6,485 658.10 3,684 14,062 642.80 2,552 7,229 658.40 3,684 14,062 643.10 2,700 8,017 658.70 3,684 14,062 643.40 2,849 8,849 659.00 3,684 14,062 643.70 2,997 9,726 659.30 3,684 14,062 644.00 3,145 10,647 659.60 3,684 14,062 644.30 3,307 11,615 659.90 3,684 14,062 644.60 3,468 12,631 660.20 3,684 14,062 644.90 3,630 13,696 660.50 3,684 14,062 645.20 3,684 14,062 660.80 3,684 14,062 645.50 3,684 14,062 661.10 3,684 14,062 645.80 3,684 14,062 661.40 3,684 14,062 646.10 3,684 14,062 661.70 3,684 14,062 646.40 3,684 14,062 662.00 3,684 14,062 646.70 3,684 14,062 662.30 3,684 14,062 647.00 3,684 14,062 662.60 3,684 14,062 647.30 3,684 14,062 662.90 3,684 14,062 647.60 3,684 14,062 663.20 3,684 14,062 647.90 3,684 14,062 663.50 3,684 14,062 648.20 3,684 14,062 663.80 3,684 14,062 648.50 3,684 14,062 664.10 3,684 14,062 648.80 3,684 14,062 664.40 3,684 14,062 649.10 3,684 14,062 664.70 3,684 14,062 649.40 3,684 14,062 665.00 3,684 14,062 649.70 3,684 14,062 665.30 3,684 14,062 650.00 3,684 14,062 665.60 3,684 14,062 650.30 3,684 14,062 665.90 3,684 14,062 650.60 3,684 14,062 666.20 3,684 14,062 650.90 3,684 14,062 666.50 3,684 14,062 651.20 3,684 14,062 651.50 3,684 14,062 651.80 3,684 14,062 652.10 3,684 14,062 652.40 3,684 14,062 652.70 3,684 14,062 653.00 3,684 14,062 653.30 3,684 14,062 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 83 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment7S: Post Developed Runoff Area=15.300 ac 65.00% Impervious Runoff Depth>6.87" Flow Length=1,300' Tc=15.4 min CN=85 Runoff=135.54 cfs 8.755 af Subcatchment8S: Actual Pre-Developed Runoff Area=5.900 ac 0.00% Impervious Runoff Depth>3.62" Flow Length=975' Tc=21.4 min CN=58 Runoff=24.69 cfs 1.778 af Subcatchment 16S: Disturbed Area Runoff Area=19.250 ac 0.00% Impervious Runoff Depth>7.20" Flow Length=745' Tc=17.2 min CN=88 Runoff=167.25 cfs 11.553 af Reach 21 R: Pond Outfall Ditch Avg. Flow Depth=2.35' Max Vel=7.97 fps Inflow=87.81 cfs 6.166 af n=0.035 L=50.0' S=0.0620'/' Capacity=19.29 cfs Outflow=88.15 cfs 6.165 af Reach 22R: Pond Outfall Ditch Avg. Flow Depth=3.34' Max Vel=5.19 fps Inflow=88.15 cfs 6.165 af n=0.035 L=100.0' S=0.0250'/' Capacity=12.25 cfs Outflow=88.11 cfs 6.163 af Pond 14P: 11-28-2014Asbuilts Peak Elev=1,032.40' Storage=209.716 cf Inflow=167.25 cfs 11.553 af Outflow=196.40 cfs 11.339 af Pond 17P: 50 Buffer Wet Pond -4*WQV Peak Elev=651.39' Storage=222.837 cf Inflow=135.70 cfs 8.788 af Primary=87.81 cfs 6.166 af Secondary=0.00 cfs 0.000 af Outflow=87.81 cfs 6.166 af Pond 19P: Forebay Peak Elev=675.34' Storage=14.062 cf Inflow=135.54 cfs 8.755 af Outflow=135.70 cfs 8.788 af Total Runoff Area =40.450 ac Runoff Volume = 22.086 af Average Runoff Depth = 6.55" 75.41% Pervious = 30.505 ac 24.59% Impervious = 9.945 ac WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type II 24-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 84 Summary for Subcatchment 7S: Post Developed Drainage Sediment Basin Sized to accomodate Runoff = 135.54 cfs @ 12.07 hrs, Volume= 8.755 af, Depth> 6.87" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-yr Rainfall=9.16" Area (ac) CN Description * 15.300 85 1/8 acre lots, 65% imp, HSG B 5.355 35.00% Pervious Area 9.945 65.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.1 200 0.0400 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 3.68" 1.1 100 0.0100 1.50 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.2 1,000 0.0150 7.64 24.01 Pipe Channel, 24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50' n= 0.015 15.4 1,300 Total Subcatchment 7S: Post Developed Drainage Hydrograph 1507� D Runoff 135.54 cfs 140= 130- Runoff=135.54 cfs 12071 Type 1124-h r 110= 100-yr Rainfall=9.16" 100= Runoff Area=15.300 ac = Runoff Volume=8.�755 af 80- a 70Runoff Depth>6.87" LL 60= � Flow 4ength=1 ,300' 50i Tc=15.4 min 30- CN=85 20 10 ax s e 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 85 Summary for Subcatchment 8S: Actual Pre-Developed Drainage Sediment Basin Sized to accomodate Runoff = 24.69 cfs @ 12.15 hrs, Volume= 1.778 af, Depth> 3.62" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-yr Rainfall=9.16" Area (ac) CN Description * 5.900 58 Woods, Good, HSG B/C weighted 5.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.3 300 0.0370 0.33 Sheet Flow, Range n= 0.130 P2= 3.68" 6.1 675 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 21.4 975 Total Subcatchment 8S: Actual Pre-Developed Drainage Hydrograph ®Runoffs 267: 24.69 cfs 24= Runoff=24.69 cfs 22- Type 1124-h r 207 100-yr Rainfall=9.16" 18 Runoff Area=5.900 ac 16- tom;* Runoff Volume=1.778 af LL 127 RUnoff Dep th3.62" 0- ft:' F=low Length=9 75' Tc=21.4 min 6= CN=58 4- r 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 86 Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff = 167.25 cfs @ 12.09 hrs, Volume= 11.553 af, Depth> 7.20" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-yr Rainfall=9.16" Area (ac) CN Description * 19.250 88 Fallow, bare soil, HSG B/C 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0.0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68" 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total Subcatchment 16S: Disturbed Area Hydrograph ®Runoff Iso_ 167.25 cfs 170; Runoff=167!25 cfs 150- ai Type II 24-hr 140 _Y �� 100 r Rainfall'=9.16 130- Runoff Area=19.250 ac 110= k 100= Runoff Volume=11:553; af so= Runoff Depth>7.20" $°:? Flow Length=745' 70 60. Tc=17.2 min So CN=88 30 :e ' 20l ¢� 10 � 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 87 Summary for Reach 21R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 4.84" for 100-yr event Inflow = 87.81 cfs @ 12.20 hrs, Volume= 6.166 of Outflow = 88.15 cfs @ 12.20 hrs, Volume= 6.165 af, Atten= 0%, Lag= 0.1 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 7.97 fps, Min. Travel Time= 0.1 min Avg. Velocity = 3.65 fps, Avg. Travel Time= 0.2 min Peak Storage= 553 cf @ 12.20 hrs Average Depth at Peak Storage= 2.35' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 19.29 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 50.0' Slope= 0.0620 '/' Inlet Invert= 635.10', Outlet Invert= 632.00' y � WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 88 Reach 21R: Pond Outfall Ditch Hydrograph / II Inflow l S27 1:11 r+f 13 Outflow 95_ " 88.15 cfs r Inflow Area=15.300 'ac 90 85t. Inflow=87:81 cfs 80= 75: C;;;1 Ou#flow=88:15 cfs 70= Avg. Flow Depth=-2. 5' 60--.r. 0= t Max Vel=7.97 fps 55. M"s,�. 50= n=0.0'35 345_ . i " 4=50.0 ao 35- S=O.O62Q '/' 25_ Capacity=19:29 cfs 2.15- : 5 £ 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 21R: Pond Outfall Ditch Stage-Discharge 1"Yr D Primary r 1 ,te f/ r 8 - 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 89 Stage-Area-Storage for Reach 21 R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 635.10 0.0 0 635.62 0.8 41 635.11 0.0 0 635.63 0.8 42 635.12 0.0 0 635.64 0.9 44 635.13 0.0 0 635.65 0.9 45 635.14 0.0 0 635.66 0.9 47 635.15 0.0 0 635.67 1.0 49 635.16 0.0 1 635.68 1.0 50 635.17 0.0 1 635.69 1.0 52 635.18 0.0 1 635.70 1.1 54 635.19 0.0 1 635.71 1.1 56 635.20 0.0 2 635.72 1.2 58 635.21 0.0 2 635.73 1.2 60 635.22 0.0 2 635.74 1.2 61 635.23 0.1 3 635.75 1.3 63 635.24 0.1 3 635.76 1.3 65 635.25 0.1 3 635.77 1.3 67 635.26 0.1 4 635.78 1.4 69 635.27 0.1 4 635.79 1.4 71 635.28 0.1 5 635.80 1.5 74 635.29 0.1 5 635.81 1.5 76 635.30 0.1 6 635.82 1.6 78 635.31 0.1 7 635.83 1.6 80 635.32 0.1 7 635.84 1.6 82 635.33 0.2 8 635.85 1.7 84 635.34 0.2 9 635.86 1.7 87 635.35 0.2 9 635.87 1.8 89 635.36 0.2 10 635.88 1.8 91 635.37 0.2 11 635.89 1.9 94 635.38 0.2 12 635.90 1.9 96 635.39 0.3 13 635.91 2.0 98 635.40 0.3 13 635.92 2.0 101 635.41 0.3 14 635.93 2.1 103 635.42 0.3 15 635.94 2.1 106 635.43 0.3 16 635.95 2.2 108 635.44 0.3 17 635.96 2.2 111 635.45 0.4 18 635.97 2.3 114 635.46 0.4 19 635.98 2.3 116 635.47 0.4 21 635.99 2.4 119 635.48 0.4 22 636.00 2.4 122 635.49 0.5 23 636.01 2.5 124 635.50 0.5 24 636.02 2.5 127 635.51 0.5 25 636.03 2.6 130 635.52 0.5 26 636.04 2.7 133 635.53 0.6 28 636.05 2.7 135 635.54 0.6 29 636.06 2.8 138 635.55 0.6 30 636.07 2.8 141 635.56 0.6 32 636.08 2.9 144 635.57 0.7 33 636.09 2.9 147 635.58 0.7 35 636.10 3.0 150 635.59 0.7 36 635.60 0.8 38 635.61 0.8 39 44101, WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type II 24-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 90 Summary for Reach 22R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 4.84" for 100-yr event Inflow = 88.15 cfs @ 12.20 hrs, Volume= 6.165 of Outflow = 88.11 cfs @ 12.21 hrs, Volume= 6.163 af, Atten= 0%, Lag= 0.3 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 5.19 fps, Min. Travel Time= 0.3 min Avg. Velocity = 2.58 fps, Avg. Travel Time= 0.6 min Peak Storage= 1,698 cf @ 12.21 hrs Average Depth at Peak Storage= 3.34' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 12.25 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 100.0' Slope= 0.0250 '/' Inlet Invert= 632.00', Outlet Invert= 629.50' 5" WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 91 Reach 22R: Pond Outfall Ditch Hydrograph - IRR 15 rf •■Inflow 95= Outflow 90_ 88.11 cfs Inflow Area-15.300 ac 85 80- Inflow=88.15 cfs 3 75= Outflow=88.111 cfs 70= a 65= Avg. ,.Flow Depth=3,34' 60": 55! � � � Max Vel=5.1 9 fps 3 50= `r n=0.0'35 0 45-E 40= 1L=100.0' 35 S=0.0250 '/' 25" Capacity=12. 20= 25 cfs 15 10= F f i 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 22R: Pond Outfall Ditch Stage-Discharge Primary w 0. r I fi� I I I 0 1 2 3 4 5 6 7 8 9 10 11 12 Discharge (cfs) r WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 92 Stage-Area-Storage for Reach 22R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 632.00 0.0 0 632.52 0.8 81 632.01 0.0 0 632.53 0.8 84 632.02 0.0 0 632.54 0.9 87 632.03 0.0 0 632.55 0.9 91 632.04 0.0 0 632.56 0.9 94 632.05 0.0 1 632.57 1.0 97 632.06 0.0 1 632.58 1.0 101 632.07 0.0 1 632.59 1.0 104 632.08 0.0 2 632.60 1.1 108 632.09 0.0 2 632.61 1.1 112 632.10 0.0 3 632.62 1.2 115 632.11 0.0 4 632.63 1.2 119 632.12 0.0 4 632.64 1.2 123 632.13 0.1 5 632.65 1.3 127 632.14 0.1 6 632.66 1.3 131 632.15 0.1 7 632.67 1.3 135 632.16 0.1 8 632.68 1.4 139 632.17 0.1 9 632.69 1.4 143 632.18 0.1 10 632.70 1.5 147 632.19 0.1 11 632.71 1.5 151 632.20 0.1 12 632.72 1.6 156 632.21 0.1 13 632.73 1.6 160 632.22 0.1 15 632.74 1.6 164 632.23 0.2 16 632.75 1.7 169 632.24 0.2 17 632.76 1.7 173 632.25 0.2 19 632.77 1.8 178 632.26 0.2 20 632.78 1.8 183 632.27 0.2 22 632.79 1.9 187 632.28 0.2 24 632.80 1.9 192 632.29 0.3 25 632.81 2.0 197 632.30 0.3 27 632.82 2.0 202 632.31 0.3 29 632.83 2.1 207 632.32 0.3 31 632.84 2.1 212 632.33 0.3 33 632.85 2.2 217 632.34 0.3 35 632.86 2.2 222 632.35 0.4 37 632.87 2.3 227 632.36 0.4 39 632.88 2.3 232 632.37 0.4 41 632.89 2.4 238 632.38 0.4 43 632.90 2.4 243 632.39 0.5 46 632.91 2.5 248 632.40 0.5 48 632.92 2.5 254 632.41 0.5 50 632.93 2.6 259 632.42 0.5 53 632.94 2.7 265 632.43 0.6 55 632.95 2.7 271 632.44 0.6 58 632.96 2.8 276 632.45 0.6 61 632.97 2.8 282 632.46 0.6 63 632.98 2.9 288 632.47 0.7 66 632.99 2.9 294 632.48 0.7 69 633.00 3.0 300 632.49 0.7 72 632.50 0.8 75 632.51 0.8 78 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 93 Summary for Pond 14P: 11-28-2014 Asbuilts Inflow Area = 19.250 ac, 0.00% Impervious, Inflow Depth > 7.20" for 100-yr event Inflow = 167.25 cfs @ 12.09 hrs, Volume= 11.553 of Outflow = 196.40 cfs @ 12.15 hrs, Volume= 11.339 af, Atten= 0%, Lag= 4.0 min Primary = 196.40 cfs @ 12.15 hrs, Volume= 11.339 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 641.07' Surf.Area= 19,161 sf Storage= 76,030 cf Peak Elev= 1,032.40' @ 12.15 hrs Surf.Area= 25,300 sf Storage= 209,716 cf (133,686 cf above start) Plug-Flow detention time= 119.9 min calculated for 9.560 af(83% of inflow) Center-of-Mass det. time= 37.8 min ( 791.3 - 753.5 ) Volume Invert Avail.Storage Storage Description #1 636.50' 209,716 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.50 12,808 0 0 637.00 14,843 6,913 6,913 638.00 15,878 15,361 22,273 639.00 16,936 16,407 38,680 640.00 17,999 17,468 56,148 641.00 19,089 18,544 74,692 642.00 20,111 19,600 94,292 643.00 21,638 20,875 115,166 644.00 22,610 22,124 137,290 645.00 23,611 23,111 160,401 646.00 24,860 24,236 184,636 647.00 25,300 25,080 209,716 Device Routing Invert Outlet Devices #1 Primary 636.11' 24.0" Round Culvert L= 110.0' CMP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 636.11' /635.04' S= 0.0097 '1 Cc= 0.900 n= 0.025 Corrugated metal, Flow Area= 3.14 sf #2 Device 1 641.07' 30.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=188.61 cfs @ 12.15 hrs HW=1,004.77' (Free Discharge) Culvert (Barrel Controls 188.61 cfs @ 60.04 fps) 2=Orifice/Grate (Passes 188.61 cfs of 449.97 cfs potential flow) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 94 Pond 14P: 11-28-2014 Asbuilts Hydrograph ®Inflow 210, 1 _ D Primary 200-, 196.40 cfs Infl,ow'Area=19.x50 ac 190= 16 5 cfs Inflow=167.25 cfs 180= 170- t 160- P - , =196.40 cfs ' �� , r��f�r� ;40 Peak EIev,1 ,032.40' 130_ 120, Storage=209,716 cf 110= o100-- .. 80= �_ 70= 50= 40- 30: 20 _ t 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 14P: 11-28-2014 Asbuilts Stage-Discharge D Primary 1,020= 1,000_ , 980 960 940= ; 9201 900= a 880 860 c 1 840 820-, 800- 780 760) ,f 740 720= f 700= 660 Orifice/Grate 640 , 0 20 40 60 80 100 120 140 160 180 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 95 Stage-Area-Storage for Pond 14P: 11-28-2014 Asbuilts Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.50 12,808 0 844.50 25,300 209,716 640.50 18,544 65,284 848.50 25,300 209,716 644.50 23,111 148,720 852.50 25,300 209,716 648.50 25,300 209,716 856.50 25,300 209,716 652.50 25,300 209,716 860.50 25,300 209,716 656.50 25,300 209,716 864.50 25,300 209,716 660.50 25,300 209,716 868.50 25,300 209,716 664.50 25,300 209,716 872.50 25,300 209,716 668.50 25,300 209,716 876.50 25,300 209,716 672.50 25,300 209,716 880.50 25,300 209,716 676.50 25,300 209,716 884.50 25,300 209,716 680.50 25,300 209,716 888.50 25,300 209,716 684.50 25,300 209,716 892.50 25,300 209,716 688.50 25,300 209,716 896.50 25,300 209,716 692.50 25,300 209,716 900.50 25,300 209,716 696.50 25,300 209,716 904.50 25,300 209,716 700.50 25,300 209,716 908.50 25,300 209,716 704.50 25,300 209,716 912.50 25,300 209,716 708.50 25,300 209,716 916.50 25,300 209,716 712.50 25,300 209,716 920.50 25,300 209,716 716.50 25,300 209,716 924.50 25,300 209,716 720.50 25,300 209,716 928.50 25,300 209,716 724.50 25,300 209,716 932.50 25,300 209,716 728.50 25,300 209,716 936.50 25,300 209,716 732.50 25,300 209,716 940.50 25,300 209,716 736.50 25,300 209,716 944.50 25,300 209,716 740.50 25,300 209,716 948.50 25,300 209,716 744.50 25,300 209,716 952.50 25,300 209,716 748.50 25,300 209,716 956.50 25,300 209,716 752.50 25,300 209,716 960.50 25,300 209,716 756.50 25,300 209,716 964.50 25,300 209,716 760.50 25,300 209,716 968.50 25,300 209,716 764.50 25,300 209,716 972.50 25,300 209,716 768.50 25,300 209,716 976.50 25,300 209,716 772.50 25,300 209,716 980.50 25,300 209,716 776.50 25,300 209,716 984.50 25,300 209,716 780.50 25,300 209,716 988.50 25,300 209,716 784.50 25,300 209,716 992.50 25,300 209,716 788.50 25,300 209,716 996.50 25,300 209,716 792.50 25,300 209,716 1,000.50 25,300 209,716 796.50 25,300 209,716 1,004.50 25,300 209,716 800.50 25,300 209,716 1,008.50 25,300 209,716 804.50 25,300 209,716 1,012.50 25,300 209,716 808.50 25,300 209,716 1,016.50 25,300 209,716 812.50 25,300 209,716 1,020.50 25,300 209,716 816.50 25,300 209,716 1,024.50 25,300 209,716 820.50 25,300 209,716 1,028.50 25,300 209,716 824.50 25,300 209,716 1,032.50 25,300 209,716 828.50 25,300 209,716 832.50 25,300 209,716 836.50 25,300 209,716 840.50 25,300 209,716 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 96 Summary for Pond 17P: 50 Buffer Wet Pond - 4*WQV Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 6.89" for 100-yr event Inflow = 135.70 cfs @ 12.07 hrs, Volume= 8.788 af Outflow = 87.81 cfs @ 12.20 hrs, Volume= 6.166 af, Atten= 35%, Lag= 7.9 min Primary = 87.81 cfs @ 12.20 hrs, Volume= 6.166 af Secondary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs/2 Starting Elev= 645.00' Surf.Area= 14,148 sf Storage= 59,616 cf Peak Elev= 651.39' @ 12.20 hrs Surf.Area= 34,627 sf Storage= 222,837 cf (163,221 cf above start) Flood Elev= 652.75' Surf.Area= 38,322 sf Storage= 272,428 cf (212,813 cf above start) Plug-Flow detention time= 172.1 min calculated for 4.789 of(54% of inflow) Center-of-Mass det. time= 59.8 min ( 816.2 - 756.4 ) Volume Invert Avail.Storage Storage Description #1 636.00' 282,088 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.00 2,115 0 0 638.00 3,986 6,101 6,101 640.00 5,861 9,847 15,948 642.00 7,877 13,738 29,686 643.00 8,913 8,395 38,081 644.00 10,004 9,459 47,540 645.00 14,148 12,076 59,616 646.00 20,082 17,115 76,731 648.00 25,067 45,149 121,880 650.00 30,518 55,585 177,465 652.00 36,418 66,936 244,401 653.00 38,957 37,688 282,088 Device Routing Invert Outlet Devices #1 Primary 635.64' 36.0" Round Culvert L= 92.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/ Outlet Invert= 635.64' /635.18' S= 0.0050 'I' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 7.07 sf #2 Device 1 645.00' 3.0" Vert. Orifice/Grate X 2.00 columns X 3 rows with 12.0" cc spacing C= 0.600 #3 Device 1 650.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Secondary 651.50' 8.0' long x 18.0' breadth Broad-Crested Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 WPO Pond - Old Trail -10B lock 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 11 24-hr 0-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 97 Primary OutFlow Max=87.50 cfs @ 12.20 hrs HW=651.39' (Free Discharge) t—tL =Culvert (Passes 87.50 cfs of 128.48 cfs potential flow) 2=Orifice/Grate (Orifice Controls 3.24 cfs @ 11.02 fps) 3=Orifice/Grate (Weir Controls 84.26 cfs @ 3.86 fps) Secondary OutFlow Max=0.00 cfs @ 5.00 hrs HW=645.03' (Free Discharge) 4=Broad-Crested Weir ( Controls 0.00 cfs) Pond 17P: 50 Buffer Wet Pond - 4*WQV Hydrograph 135.70 cfs - - - ■Inflow D Outflow 'Inflow/ r Area=15.300 ac Primary 150 ■Secondary ,4°= Inflow=135.70 cfs 130- Outflow=87.81 cfs 120-' 11°_ 18�$1Rcfs Primary=87.$1 cfs 100- Secondary=0.00 cfs w 90- '‘,e--'!.0 Peak EIev=651 39' LL 70- � Storage=222,837 cf d; '' A#3/. 40 30= 'FA a7.: ec. haw.. .w‘.*::• ;_l',:,_"--., m gr 0.00 cfs 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 98 Pond 17P: 50 Buffer Wet Pond - 4*WQV Stage-Discharge ir'��/r T .wr "'s ®Primary � '' tal Secondary 653 '` 652 —r Broad Crested Weir �, .�:1;.,-2,-,:.. Orifice/Grate 651 r ,650 649 648 647 /,',/; Orifice/Grate m ��;!� w 646 �I` c 645 rm d 643 fir' _ w 642r 641 640 `j; 639 f 6381 637 636 0 20 40 60 80 100 120 140 160 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 99 Stage-Area-Storage for Pond 17P: 50 Buffer Wet Pond -4*WQV Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.00 2,115 0 646.40 21,079 84,963 636.20 2,302 442 646.60 21,578 89,228 636.40 2,489 921 646.80 22,076 93,594 636.60 2,676 1,437 647.00 22,575 98,059 636.80 2,863 1,991 647.20 23,073 102,624 637.00 3,051 2,583 647.40 23,571 107,288 637.20 3,238 3,212 647.60 24,070 112,052 637.40 3,425 3,878 647.80 24,568 116,916 637.60 3,612 4,581 648.00 25,067 121,880 637.80 3,799 5,323 648.20 25,612 126,947 638.00 3,986 6,101 648.40 26,157 132,124 638.20 4,174 6,917 648.60 26,702 137,410 638.40 4,361 7,770 648.80 27,247 142,805 638.60 4,549 8,661 649.00 27,793 148,309 638.80 4,736 9,590 649.20 28,338 153,922 639.00 4,924 10,556 649.40 28,883 159,644 639.20 5,111 11,559 649.60 29,428 165,475 639.40 5,298 12,600 649.80 29,973 171,415 639.60 5,486 13,679 650.00 30,518 177,465 639.80 5,673 14,795 650.20 31,108 183,627 640.00 5,861 15,948 650.40 31,698 189,908 640.20 6,063 17,140 650.60 32,288 196,306 640.40 6,264 18,373 650.80 32,878 202,823 640.60 6,466 19,646 651.00 33,468 209,458 640.80 6,667 20,959 651.20 34,058 216,210 641.00 6,869 22,313 651.40 34,648 223,081 641.20 7,071 23,707 651.60 35,238 230,069 641.40 7,272 25,141 651.80 35,828 237,176 641.60 7,474 26,616 652.00 36,418 244,401 641.80 7,675 28,131 652.20 36,926 251,735 642.00 7,877 29,686 652.40 37,434 259,171 642.20 8,084 31,282 652.60 37,941 266,708 642.40 8,291 32,920 652.80 38,449 274,347 642.60 8,499 34,599 653.00 38,957 282,088 642.80 8,706 36,319 643.00 8,913 38,081 643.20 9,131 39,885 643.40 9,349 41,733 643.60 9,568 43,625 643.80 9,786 45,561 644.00 10,004 47,540 644.20 10,833 49,623 644.40 11,662 51,873 644.60 12,490 54,288 644.80 13,319 56,869 645.00 14,148 59,616 645.20 15,335 62,564 645.40 16,522 65,749 645.60 17,708 69,172 645.80 18,895 72,833 646.00 20,082 76,731 646.20 20,581 80,797 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 100 Summary for Pond 19P: Forebay Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 6.87" for 100-yr event Inflow = 135.54 cfs @ 12.07 hrs, Volume= 8.755 af Outflow = 135.70 cfs @ 12.07 hrs, Volume= 8.788 af, Atten= 0%, Lag= 0.0 min Primary = 135.70 cfs @ 12.07 hrs, Volume= 8.788 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 645.00' Surf.Area= 3,684 sf Storage= 14,062 cf Peak Elev= 675.34' @ 12.07 hrs Surf.Area= 3,684 sf Storage= 14,062 cf Plug-Flow detention time= 25.4 min calculated for 8.465 af(97% of inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow) Volume Invert Avail.Storage Storage Description #1 638.00' 14,062 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 638.00 608 0 0 640.00 1,290 1,898 1,898 642.00 2,157 3,447 5,345 644.00 3,145 5,302 10,647 645.00 3,684 3,415 14,062 Device Routing Invert Outlet Devices #1 Primary 644.75' 20.0' long x 0.25' rise Sharp-Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=133.37 cfs @ 12.07 hrs HW=674.36' (Free Discharge) t-1=Sharp-Crested Vee/Trap Weir(Orifice Controls 133.37 cfs @ 26.67 fps) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 101 Pond 19P: Forebay Hydrograph 150- I 11c cd rf ■Inflow Primary 140= 135.70 cfs ( 'Inflow ,Area= 15.300 ac 130- Inflow=135,54 cfs 120- 110= - Primary=135.70 cfs 100: ' * Peak EIev=675.34' 90= 80= Storage=14,062 ;Cf 0 70_ 60-- 50- 1 n1 40= 30= , 20= 1 A a n a E.. .: , .• F.,,-;:- 0 • • • 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 19P: Forebay Stage-Discharge - - - _ r - _ - - I 674= ®Primary 672= 670 L I ' 668= , 666= 664= 662= i 660= 658 o - o 656_ I .- _ - - - _ -, _ - - ' - - - - - - r - -- 654 ., �J - 0 w 652 "• 650= , „ -?=:'-- 6.46..." -Sharp-Crested Veeirrap Weir - 642 640 l 638 ( , ( / 0 10 20 30 40 50 60 70 80 90 100 110 120 130 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 100-yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 102 Stage-Area-Storage for Pond 19P: Forebay Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 638.00 608 0 658.80 3,684 14,062 638.40 744 270 659.20 3,684 14,062 638.80 881 596 659.60 3,684 14,062 639.20 1,017 975 660.00 3,684 14,062 639.60 1,154 1,409 660.40 3,684 14,062 640.00 1,290 1,898 660.80 3,684 14,062 640.40 1,463 2,449 661.20 3,684 14,062 640.80 1,637 3,069 661.60 3,684 14,062 641.20 1,810 3,758 662.00 3,684 14,062 641.60 1,984 4,517 662.40 3,684 14,062 642.00 2,157 5,345 662.80 3,684 14,062 642.40 2,355 6,247 663.20 3,684 14,062 642.80 2,552 7,229 663.60 3,684 14,062 643.20 2,750 8,289 664.00 3,684 14,062 643.60 2,947 9,429 664.40 3,684 14,062 644.00 3,145 10,647 664.80 3,684 14,062 644.40 3,361 11,948 665.20 3,684 14,062 644.80 3,576 13,335 665.60 3,684 14,062 645.20 3,684 14,062 666.00 3,684 14,062 645.60 3,684 14,062 666.40 3,684 14,062 646.00 3,684 14,062 666.80 3,684 14,062 646.40 3,684 14,062 667.20 3,684 14,062 646.80 3,684 14,062 667.60 3,684 14,062 647.20 3,684 14,062 668.00 3,684 14,062 647.60 3,684 14,062 668.40 3,684 14,062 648.00 3,684 14,062 668.80 3,684 14,062 648.40 3,684 14,062 669.20 3,684 14,062 648.80 3,684 14,062 669.60 3,684 14,062 649.20 3,684 14,062 670.00 3,684 14,062 649.60 3,684 14,062 670.40 3,684 14,062 650.00 3,684 14,062 670.80 3,684 14,062 650.40 3,684 14,062 671.20 3,684 14,062 650.80 3,684 14,062 671.60 3,684 14,062 651.20 3,684 14,062 672.00 3,684 14,062 651.60 3,684 14,062 672.40 3,684 14,062 652.00 3,684 14,062 672.80 3,684 14,062 652.40 3,684 14,062 673.20 3,684 14,062 652.80 3,684 14,062 673.60 3,684 14,062 653.20 3,684 14,062 674.00 3,684 14,062 653.60 3,684 14,062 674.40 3,684 14,062 654.00 3,684 14,062 674.80 3,684 14,062 654.40 3,684 14,062 654.80 3,684 14,062 655.20 3,684 14,062 655.60 3,684 14,062 656.00 3,684 14,062 656.40 3,684 14,062 656.80 3,684 14,062 657.20 3,684 14,062 657.60 3,684 14,062 658.00 3,684 14,062 658.40 3,684 14,062 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 103 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment7S: Post Developed Runoff Area=15.300 ac 65.00% Impervious Runoff Depth>8.09" Flow Length=1,300' Tc=15.4 min CN=85 Runoff=158.24 cfs 10.311 af Subcatchment8S: Actual Pre-Developed Runoff Area=5.900 ac 0.00% Impervious Runoff Depth>4.59" Flow Length=975' Tc=21.4 min CN=58 Runoff=31.46 cfs 2.258 af Subcatchment16S: Disturbed Area Runoff Area=19.250 ac 0.00% Impervious Runoff Depth>8.43" Flow Length=745' Tc=17.2 min CN=88 Runoff=194.16 cfs 13.516 af Reach 21R: Pond Outfall Ditch Avg. Flow Depth=2.93' Max Vel=8.10 fps Inflow=117.33 cfs 7.647 af n=0.035 L=50.0' S=0.0620 '/' Capacity=19.29 cfs Outflow=117.61 cfs 7.646 af Reach 22R: Pond Outfall Ditch Avg. Flow Depth=4.25' Max Vel=5.24 fps Inflow=117.61 cfs 7.646 af n=0.035 L=100.0' S=0.0250 '/' Capacity=12.25 cfs Outflow=117.51 cfs 7.644 af Pond 14P: 11-28-2014Asbuilts Peak Elev=1,044.74' Storage=209.716 cf Inflow=194.16 cfs 13.516 af Outflow=206.64 cfs 13.270 af Pond 17P: 50 Buffer Wet Pond -4*WQV Peak Elev=651.70' Storage=233.643 cf Inflow=158.32 cfs 10.344 af Primary=117.33 cfs 7.647 af Secondary=1.97 cfs 0.017 af Outflow=119.30 cfs 7.663 af Pond 19P: Forebay Peak Elev=686.35' Storage=14.062 cf Inflow=158.24 cfs 10.311 af Outflow=158.32 cfs 10.344 af Total Runoff Area = 40.450 ac Runoff Volume = 26.086 af Average Runoff Depth = 7.74" 75.41% Pervious = 30.505 ac 24.59% Impervious = 9.945 ac mask WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 104 Summary for Subcatchment 7S: Post Developed Drainage Sediment Basin Sized to accomodate Runoff = 158.24 cfs @ 12.07 hrs, Volume= 10.311 af, Depth> 8.09" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 200-yr Rainfall=10.50" Area (ac) CN Description * 15.300 85 1/8 acre lots, 65% imp, HSG B 5.355 35.00% Pervious Area 9.945 65.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.1 200 0.0400 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 3.68" 1.1 100 0.0100 1.50 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.2 1,000 0.0150 7.64 24.01 Pipe Channel, 24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50' n= 0.015 15.4 1,300 Total Subcatchment 7S: Post Developed Drainage Hydrograph D Runoff` 170= 158.24 cfs 160= Runoff=158:24 cfs 150 140= Ty.pe I'I 24-hr 13°' 200-yr Rainfall=10.50" 120= 110, Runoff Area=15.300 ac 7,-3100_ Runoff Volume=10:311 af nod 90- 3 R f Depth 9" 0 80' 70 Flow Length=1,300' 60:3' I TC=15.4 min 503 CN=85 304 1 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 105 Summary for Subcatchment 8S: Actual Pre-Developed Drainage Sediment Basin Sized to accomodate Runoff = 31.46 cfs @ 12.15 hrs, Volume= 2.258 af, Depth> 4.59" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 200-yr Rainfall=10.50" Area (ac) CN Description * 5.900 58 Woods, Good, HSG B/C weighted 5.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.3 300 0.0370 0.33 Sheet Flow, Range n= 0.130 P2= 3.68" 6.1 675 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 21.4 975 Total Subcatchment 8S: Actual Pre-Developed Drainage Hydrograph 34-E 31.46 cfs Runoff` 32 Runoff=31.46 cfs 30=" 28= Type II 24-hr 26= 24� 200-yr Rainfall=10.50" Runoff Area=5.900 ac Runoff Vol =- 18- ume=2.258 of 3 16- LL - I Runoff Depth>4.59" I Flow Length=975' Tc=21.4-min 8= CN=58 2: fi rr 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 106 Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff = 194.16 cfs @ 12.09 hrs, Volume= 13.516 af, Depth> 8.43" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 200-yr Rainfall=10.50" Area (ac) CN Description * 19.250 88 Fallow, bare soil, HSG B/C 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0.0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68" 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total Subcatchment 16S: Disturbed Area Hydrograph ®Runoff 210,', 194.16 cfs ' 200=; 190= f:iRunoff7194.16 cfs ,807 il 170- i Type II 24-hr 141 r Rainf 0" ;50= , 200-y all='10.6 140= RunOff Area=19.250 ac 1207 Runoff Volume=13.516 af 10' Runoff Depth; >8.43" 0 100= .' 9° Flow Length=7451 70 , 1 ';',-1Tc=1 7.2 min s00 1 CN=88 30 • ; 4 �,dY.:.tS.k f:•--1-;:i�g sus Y1. 4f',ti t',n°' 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 107 Summary for Reach 21 R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 6.00" for 200-yr event Inflow = 117.33 cfs @ 12.17 hrs, Volume= 7.647 af Outflow = 117.61 cfs @ 12.17 hrs, Volume= 7.646 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 8.10 fps, Min. Travel Time= 0.1 min Avg. Velocity = 3.79 fps, Avg. Travel Time= 0.2 min Peak Storage= 725 cf @ 12.17 hrs Average Depth at Peak Storage= 2.93' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 19.29 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 50.0' Slope= 0.0620 '/' Inlet Invert= 635.10', Outlet Invert= 632.00' s { WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 108 Reach 21R: Pond Outfall Ditch Hydrograph ■Inflow 130 I 117 'A' rfs o Outflow 120- 117.61 cfs Inflow Area=15.300 ac 110=- lnflgw=117.33 cfs 100= Outflow=117.61 cfs 90= Avg. Flow Depth=2.93' 807 Mast Ve11=8.10 fps 707 n=0.035 LL 60- L=50.0' 50- S=0.0620 '1' 30- ' 30- Capacity=19.29 cfs 20 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 21R: Pond Outfall Ditch Stage-Discharge 40- 14,01104*.-r0 Primary f"f7" / •-D 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 109 Stage-Area-Storage for Reach 21R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 635.10 0.0 0 635.62 0.8 41 635.11 0.0 0 635.63 0.8 42 635.12 0.0 0 635.64 0.9 44 635.13 0.0 0 635.65 0.9 45 635.14 0.0 0 635.66 0.9 47 635.15 0.0 0 635.67 1.0 49 635.16 0.0 1 635.68 1.0 50 635.17 0.0 1 635.69 1.0 52 635.18 0.0 1 635.70 1.1 54 635.19 0.0 1 635.71 1.1 56 635.20 0.0 2 635.72 1.2 58 635.21 0.0 2 635.73 1.2 60 635.22 0.0 2 635.74 1.2 61 635.23 0.1 3 635.75 1.3 63 635.24 0.1 3 635.76 1.3 65 635.25 0.1 3 635.77 1.3 67 635.26 0.1 4 635.78 1.4 69 635.27 0.1 4 635.79 1.4 71 635.28 0.1 5 635.80 1.5 74 635.29 0.1 5 635.81 1.5 76 635.30 0.1 6 635.82 1.6 78 635.31 0.1 7 635.83 1.6 80 635.32 0.1 7 635.84 1.6 82 635.33 0.2 8 635.85 1.7 84 635.34 0.2 9 635.86 1.7 87 635.35 0.2 9 635.87 1.8 89 635.36 0.2 10 635.88 1.8 91 635.37 0.2 11 635.89 1.9 94 635.38 0.2 12 635.90 1.9 96 635.39 0.3 13 635.91 2.0 98 635.40 0.3 13 635.92 2.0 101 635.41 0.3 14 635.93 2.1 103 635.42 0.3 15 635.94 2.1 106 635.43 0.3 16 635.95 2.2 108 635.44 0.3 17 635.96 2.2 111 635.45 0.4 18 635.97 2.3 114 635.46 0.4 19 635.98 2.3 116 635.47 0.4 21 635.99 2.4 119 635.48 0.4 22 636.00 2.4 122 635.49 0.5 23 636.01 2.5 124 635.50 0.5 24 636.02 2.5 127 635.51 0.5 25 636.03 2.6 130 635.52 0.5 26 636.04 2.7 133 635.53 0.6 28 636.05 2.7 135 635.54 0.6 29 636.06 2.8 138 635.55 0.6 30 636.07 2.8 141 635.56 0.6 32 636.08 2.9 144 635.57 0.7 33 636.09 2.9 147 635.58 0.7 35 636.10 3.0 150 635.59 0.7 36 635.60 0.8 38 635.61 0.8 39 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 110 Summary for Reach 22R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 6.00" for 200-yr event Inflow = 117.61 cfs @ 12.17 hrs, Volume= 7.646 af Outflow = 117.51 cfs @ 12.17 hrs, Volume= 7.644 af, Atten= 0%, Lag= 0.3 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 5.24 fps, Min. Travel Time= 0.3 min Avg. Velocity = 2.67 fps, Avg. Travel Time= 0.6 min Peak Storage= 2,240 cf @ 12.17 hrs Average Depth at Peak Storage= 4.25' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 12.25 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 100.0' Slope= 0.0250 '/' Inlet Invert= 632.00', Outlet Invert= 629.50' WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 111 Reach 22R: Pond Outfall Ditch Hydrograph 130- 1117 F1 rf II Inflow 117.51 cfs ®outflow 120: Inflow Area=15.300 'ac ,10 Inflow=117.61 cfs 3 100 Outflow=117.51 cfs r 90_ Avg. Flow Depth=4.25' 80- Max Vel=5.24 fps a ::' n0 0'35 f L=1000' A 407 S=0.0250 ''/' �� ,mss ' 30-jCapacity=12.25 cfs 20-] 10 AC 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 22R: Pond Outfall Ditch Stage-Discharge 1 � ®Primary 1 w o. Q j 0 1 2 3 4 5 6 7 8 9 10 11 12 Discharge (cfs) mm. WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 112 Stage-Area-Storage for Reach 22R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 632.00 0.0 0 632.52 0.8 81 632.01 0.0 0 632.53 0.8 84 632.02 0.0 0 632.54 0.9 87 632.03 0.0 0 632.55 0.9 91 632.04 0.0 0 632.56 0.9 94 632.05 0.0 1 632.57 1.0 97 632.06 0.0 1 632.58 1.0 101 632.07 0.0 1 632.59 1.0 104 632.08 0.0 2 632.60 1.1 108 632.09 0.0 2 632.61 1.1 112 632.10 0.0 3 632.62 1.2 115 632.11 0.0 4 632.63 1.2 119 632.12 0.0 4 632.64 1.2 123 632.13 0.1 5 632.65 1.3 127 632.14 0.1 6 632.66 1.3 131 632.15 0.1 7 632.67 1.3 135 632.16 0.1 8 632.68 1.4 139 632.17 0.1 9 632.69 1.4 143 632.18 0.1 10 632.70 1.5 147 632.19 0.1 11 632.71 1.5 151 632.20 0.1 12 632.72 1.6 156 632.21 0.1 13 632.73 1.6 160 632.22 0.1 15 632.74 1.6 164 632.23 0.2 16 632.75 1.7 169 632.24 0.2 17 632.76 1.7 173 632.25 0.2 19 632.77 1.8 178 632.26 0.2 20 632.78 1.8 183 632.27 0.2 22 632.79 1.9 187 632.28 0.2 24 632.80 1.9 192 632.29 0.3 25 632.81 2.0 197 632.30 0.3 27 632.82 2.0 202 632.31 0.3 29 632.83 2.1 207 632.32 0.3 31 632.84 2.1 212 632.33 0.3 33 632.85 2.2 217 632.34 0.3 35 632.86 2.2 222 632.35 0.4 37 632.87 2.3 227 632.36 0.4 39 632.88 2.3 232 632.37 0.4 41 632.89 2.4 238 632.38 0.4 43 632.90 2.4 243 632.39 0.5 46 632.91 2.5 248 632.40 0.5 48 632.92 2.5 254 632.41 0.5 50 632.93 2.6 259 632.42 0.5 53 632.94 2.7 265 632.43 0.6 55 632.95 2.7 271 632.44 0.6 58 632.96 2.8 276 632.45 0.6 61 632.97 2.8 282 632.46 0.6 63 632.98 2.9 288 632.47 0.7 66 632.99 2.9 294 632.48 0.7 69 633.00 3.0 300 632.49 0.7 72 632.50 0.8 75 632.51 0.8 78 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type ll 24-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 113 Summary for Pond 14P: 11-28-2014 Asbuilts Inflow Area = 19.250 ac, 0.00% Impervious, Inflow Depth > 8.43" for 200-yr event Inflow = 194.16 cfs @ 12.09 hrs, Volume= 13.516 af Outflow = 206.64 cfs @ 12.12 hrs, Volume= 13.270 af, Atten= 0%, Lag= 2.0 min Primary = 206.64 cfs @ 12.12 hrs, Volume= 13.270 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 641.07' Surf.Area= 19,161 sf Storage= 76,030 cf Peak Elev= 1,044.74' @ 12.12 hrs Surf.Area= 25,300 sf Storage= 209,716 cf (133,686 cf above start) Plug-Flow detention time= 111.5 min calculated for 11.523 af(85% of inflow) Center-of-Mass det. time= 35.1 min ( 786.0 - 750.9 ) Volume Invert Avail.Storage Storage Description #1 636.50' 209,716 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.50 12,808 0 0 637.00 14,843 6,913 6,913 638.00 15,878 15,361 22,273 639.00 16,936 16,407 38,680 640.00 17,999 17,468 56,148 641.00 19,089 18,544 74,692 642.00 20,111 19,600 94,292 643.00 21,638 20,875 115,166 644.00 22,610 22,124 137,290 645.00 23,611 23,111 160,401 646.00 24,860 24,236 184,636 647.00 25,300 25,080 209,716 Device Routing Invert Outlet Devices #1 Primary 636.11' 24.0" Round Culvert L= 110.0' CMP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 636.11' /635.04' S= 0.0097 '/' Cc= 0.900 n= 0.025 Corrugated metal, Flow Area= 3.14 sf #2 Device 1 641.07' 30.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=185.34 cfs @ 12.12 hrs HW=992.13' (Free Discharge) L1Culvert (Barrel Controls 185.34 cfs @ 59.00 fps) 2=Orifice/Grate (Passes 185.34 cfs of 442.06 cfs potential flow) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 114 Pond 14P: 11-28-2014 Asbuilts Hydrograph ®Inflow 230 0 Primary 22° 206.64 cfs r Inflow'Area=19.250 ac 210= 200= 190-? Inflow=194.16 cfs � 170= Primary=206.64 cfs 160_ 150_ Peak Elev=1,044.74' 140 If 130_ 120= Storage=209,J16,cf ' 3 110= LL 100 902 a . 50� 40_ .> ' 30� 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 14P: 11-28-2014 Asbuilts Stage-Discharge / D Primary 1,000i 980= 960 940 F 920t- 900= 20_900= 880 , • 860- 840- c g 820- t 800 • 780= 760- 740- 720- 60=740_720= f 700- 680-, � 6607Orifice/Grate 0 20 40 60 80 100 120 140 160 180 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 115 Stage-Area-Storage for Pond 14P: 11-28-2014 Asbuilts Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.50 12,808 0 836.70 25,300 209,716 640.35 18,381 62,514 840.55 25,300 209,716 644.20 22,810 141,832 844.40 25,300 209,716 648.05 25,300 209,716 848.25 25,300 209,716 651.90 25,300 209,716 852.10 25,300 209,716 655.75 25,300 209,716 855.95 25,300 209,716 659.60 25,300 209,716 859.80 25,300 209,716 663.45 25,300 209,716 863.65 25,300 209,716 667.30 25,300 209,716 867.50 25,300 209,716 671.15 25,300 209,716 871.35 25,300 209,716 675.00 25,300 209,716 875.20 25,300 209,716 678.85 25,300 209,716 879.05 25,300 209,716 682.70 25,300 209,716 882.90 25,300 209,716 686.55 25,300 209,716 886.75 25,300 209,716 690.40 25,300 209,716 890.60 25,300 209,716 694.25 25,300 209,716 894.45 25,300 209,716 698.10 25,300 209,716 898.30 25,300 209,716 701.95 25,300 209,716 902.15 25,300 209,716 705.80 25,300 209,716 906.00 25,300 209,716 709.65 25,300 209,716 909.85 25,300 209,716 713.50 25,300 209,716 913.70 25,300 209,716 717.35 25,300 209,716 917.55 25,300 209,716 721.20 25,300 209,716 921.40 25,300 209,716 725.05 25,300 209,716 925.25 25,300 209,716 728.90 25,300 209,716 929.10 25,300 209,716 732.75 25,300 209,716 932.95 25,300 209,716 736.60 25,300 209,716 936.80 25,300 209,716 740.45 25,300 209,716 940.65 25,300 209,716 744.30 25,300 209,716 944.50 25,300 209,716 748.15 25,300 209,716 948.35 25,300 209,716 752.00 25,300 209,716 952.20 25,300 209,716 755.85 25,300 209,716 956.05 25,300 209,716 759.70 25,300 209,716 959.90 25,300 209,716 763.55 25,300 209,716 963.75 25,300 209,716 767.40 25,300 209,716 967.60 25,300 209,716 771.25 25,300 209,716 971.45 25,300 209,716 775.10 25,300 209,716 975.30 25,300 209,716 778.95 25,300 209,716 979.15 25,300 209,716 782.80 25,300 209,716 983.00 25,300 209,716 786.65 25,300 209,716 986.85 25,300 209,716 790.50 25,300 209,716 990.70 25,300 209,716 794.35 25,300 209,716 994.55 25,300 209,716 798.20 25,300 209,716 998.40 25,300 209,716 802.05 25,300 209,716 1,002.25 25,300 209,716 805.90 25,300 209,716 1,006.10 25,300 209,716 809.75 25,300 209,716 1,009.95 25,300 209,716 813.60 25,300 209,716 1,013.80 25,300 209,716 817.45 25,300 209,716 1,017.65 25,300 209,716 821.30 25,300 209,716 825.15 25,300 209,716 829.00 25,300 209,716 832.85 25,300 209,716 m. WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 116 Summary for Pond 17P: 50 Buffer Wet Pond - 4*WQV Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 8.11" for 200-yr event Inflow = 158.32 cfs @ 12.07 hrs, Volume= 10.344 af Outflow = 119.30 cfs @ 12.17 hrs, Volume= 7.663 af, Atten= 25%, Lag= 6.1 min Primary = 117.33 cfs @ 12.17 hrs, Volume= 7.647 af Secondary = 1.97 cfs @ 12.17 hrs, Volume= 0.017 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs/2 Starting Elev= 645.00' Surf.Area= 14,148 sf Storage= 59,616 cf Peak Elev= 651.70' @ 12.17 hrs Surf.Area= 35,536 sf Storage= 233,643 cf (174,027 cf above start) Flood Elev= 652.75' Surf.Area= 38,322 sf Storage= 272,428 cf (212,813 cf above start) Plug-Flow detention time= 149.8 min calculated for 6.265 af(61% of inflow) Center-of-Mass det. time= 52.1 min ( 805.7 - 753.6 ) Volume Invert Avail.Storage Storage Description #1 636.00' 282,088 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.00 2,115 0 0 638.00 3,986 6,101 6,101 640.00 5,861 9,847 15,948 642.00 7,877 13,738 29,686 643.00 8,913 8,395 38,081 644.00 10,004 9,459 47,540 645.00 14,148 12,076 59,616 646.00 20,082 17,115 76,731 648.00 25,067 45,149 121,880 650.00 30,518 55,585 177,465 652.00 36,418 66,936 244,401 653.00 38,957 37,688 282,088 Device Routing Invert Outlet Devices #1 Primary 635.64' 36.0" Round Culvert L= 92.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/ Outlet Invert= 635.64' /635.18' S= 0.0050 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 7.07 sf #2 Device 1 645.00' 3.0" Vert. Orifice/Grate X 2.00 columns X 3 rows with 12.0" cc spacing C= 0.600 #3 Device 1 650.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Secondary 651.50' 8.0' long x 18.0' breadth Broad-Crested Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 117 Primary OutFlow Max=115.25 cfs @ 12.17 hrs HW=651.68' (Free Discharge) L =Culvert (Passes 115.25 cfs of 129.78 cfs potential flow) 2=Orifice/Grate (Orifice Controls 3.33 cfs @ 11.32 fps) L3=Orifice/Grate (Weir Controls 111.92 cfs @ 4.24 fps) econdary OutFlow Max=1.66 cfs @ 12.17 hrs HW=651.68' (Free Discharge) =Broad-Crested Weir (Weir Controls 1.66 cfs @ 1.14 fps) Pond 17P: 50 Buffer Wet Pond - 4*WQV Hydrograph 158.32 cfs NI Inflow fl Outflow 'Inflow'Area=15.300 ac Primary 170= ®Secondary ,60 Inflow=158.32 cfs 150- 119.30 cf Outflow=119.30 CfS 140_ 17.33 cfs ry= 17.33 cfs ,: _ � i 130: Pr ma 1 �, 120 Secondary=1.97 cfs 100- ::*;0Peak Elev=651.70' 80= Stora9 a=233 643 cf LL - � 70. 40= ' 20 4/Zro ° �a e54.. s.71 ;42:17. a�s.r .,„',. .f.?etll./�'.// 10 a 1.97 cfs 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) A. WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard CompanyPrinted 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 118 Pond 17P: 50 Buffer Wet Pond - 4*WQV Stage-Discharge Apor.n/r/ , ter , 0 Total .4. A � Primary I Secondary 653 Y x �,; � s=.,�.� � 652 - r Broad-Crested Weir. ems- .., a . - Orifice/Grate 651 f/ 650 r,,;�r 649 648 %,;,", 647 /%% Orifice/Grate ai 646 �..���//.. • 645 Fj • 644 0 w 643 f w 642 .'f 641 640 639 638 - 637 / 636 , . ( . , 0 20 40 60 80 100 120 140 160 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 119 Stage-Area-Storage for Pond 17P: 50 Buffer Wet Pond -4*WQV Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.00 2,115 0 646.40 21,079 84,963 636.20 2,302 442 646.60 21,578 89,228 636.40 2,489 921 646.80 22,076 93,594 636.60 2,676 1,437 647.00 22,575 98,059 636.80 2,863 1,991 647.20 23,073 102,624 637.00 3,051 2,583 647.40 23,571 107,288 637.20 3,238 3,212 647.60 24,070 112,052 637.40 3,425 3,878 647.80 24,568 116,916 637.60 3,612 4,581 648.00 25,067 121,880 637.80 3,799 5,323 648.20 25,612 126,947 638.00 3,986 6,101 648.40 26,157 132,124 638.20 4,174 6,917 648.60 26,702 137,410 638.40 4,361 7,770 648.80 27,247 142,805 638.60 4,549 8,661 649.00 27,793 148,309 638.80 4,736 9,590 649.20 28,338 153,922 639.00 4,924 10,556 649.40 28,883 159,644 639.20 5,111 11,559 649.60 29,428 165,475 639.40 5,298 12,600 649.80 29,973 171,415 639.60 5,486 13,679 650.00 30,518 177,465 639.80 5,673 14,795 650.20 31,108 183,627 640.00 5,861 15,948 650.40 31,698 189,908 640.20 6,063 17,140 650.60 32,288 196,306 640.40 6,264 18,373 650.80 32,878 202,823 640.60 6,466 19,646 651.00 33,468 209,458 640.80 6,667 20,959 651.20 34,058 216,210 641.00 6,869 22,313 651.40 34,648 223,081 641.20 7,071 23,707 651.60 35,238 230,069 641.40 7,272 25,141 651.80 35,828 237,176 641.60 7,474 26,616 652.00 36,418 244,401 641.80 7,675 28,131 652.20 36,926 251,735 642.00 7,877 29,686 652.40 37,434 259,171 642.20 8,084 31,282 652.60 37,941 266,708 642.40 8,291 32,920 652.80 38,449 274,347 642.60 8,499 34,599 653.00 38,957 282,088 642.80 8,706 36,319 643.00 8,913 38,081 643.20 9,131 39,885 643.40 9,349 41,733 643.60 9,568 43,625 643.80 9,786 45,561 644.00 10,004 47,540 644.20 10,833 49,623 644.40 11,662 51,873 644.60 12,490 54,288 644.80 13,319 56,869 645.00 14,148 59,616 645.20 15,335 62,564 645.40 16,522 65,749 645.60 17,708 69,172 645.80 18,895 72,833 646.00 20,082 76,731 646.20 20,581 80,797 Mil WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 120 Summary for Pond 19P: Forebay Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 8.09" for 200-yr event Inflow = 158.24 cfs @ 12.07 hrs, Volume= 10.311 af Outflow = 158.32 cfs @ 12.07 hrs, Volume= 10.344 af, Atten= 0%, Lag= 0.0 min Primary = 158.32 cfs @ 12.07 hrs, Volume= 10.344 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 645.00' Surf.Area= 3,684 sf Storage= 14,062 cf Peak Elev= 686.35' @ 12.07 hrs Surf.Area= 3,684 sf Storage= 14,062 cf Plug-Flow detention time= 22.4 min calculated for 10.021 af(97% of inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow) Volume Invert Avail.Storage Storage Description #1 638.00' 14,062 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 638.00 608 0 0 640.00 1,290 1,898 1,898 642.00 2,157 3,447 5,345 644.00 3,145 5,302 10,647 645.00 3,684 3,415 14,062 Device Routing Invert Outlet Devices #1 Primary 644.75' 20.0' long x 0.25' rise Sharp-Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=155.67 cfs @ 12.07 hrs HW=685.04' (Free Discharge) t-1=Sharp-Crested Vee/Trap Weir(Orifice Controls 155.67 cfs @ 31.13 fps) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 121 Pond 19P: Forebay Hydrograph 1c7d rf ■Inflow I 1707 158.32 cfs ®Primary 1603 InflowArea=15.300 ac 140 Inflow=158.24 cfs 130= Primary=158.32 cfs 120. 110: Peak EIev=686.35' 100_ 907: Storage=14,062 cf 80- 60= , 50= ra• ; 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 19P: Forebay Stage-Discharge 6841 ®Primaryi 682= 680= 678= 676= 674 672= 670= 668= ai 666= 664 0 662 m 660-i > - d 658= w 656; 654' 652= 650 6461: Sharp-CrestedVeerrrap-Weir 644 642 640 638 ; , , . , , . 0 20 40 60 80 100 120 140 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 200-yr Rainfall=10.50" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 122 Stage-Area-Storage for Pond 19P: Forebay Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 638.00 608 0 664.00 3,684 14,062 638.50 779 347 664.50 3,684 14,062 639.00 949 779 665.00 3,684 14,062 639.50 1,120 1,296 665.50 3,684 14,062 640.00 1,290 1,898 666.00 3,684 14,062 640.50 1,507 2,597 666.50 3,684 14,062 641.00 1,724 3,405 667.00 3,684 14,062 641.50 1,940 4,321 667.50 3,684 14,062 642.00 2,157 5,345 668.00 3,684 14,062 642.50 2,404 6,485 668.50 3,684 14,062 643.00 2,651 7,749 669.00 3,684 14,062 643.50 2,898 9,136 669.50 3,684 14,062 644.00 3,145 10,647 670.00 3,684 14,062 644.50 3,415 12,287 670.50 3,684 14,062 645.00 3,684 14,062 671.00 3,684 14,062 645.50 3,684 14,062 671.50 3,684 14,062 646.00 3,684 14,062 672.00 3,684 14,062 646.50 3,684 14,062 672.50 3,684 14,062 647.00 3,684 14,062 673.00 3,684 14,062 647.50 3,684 14,062 673.50 3,684 14,062 648.00 3,684 14,062 674.00 3,684 14,062 648.50 3,684 14,062 674.50 3,684 14,062 649.00 3,684 14,062 675.00 3,684 14,062 649.50 3,684 14,062 675.50 3,684 14,062 650.00 3,684 14,062 676.00 3,684 14,062 650.50 3,684 14,062 676.50 3,684 14,062 651.00 3,684 14,062 677.00 3,684 14,062 651.50 3,684 14,062 677.50 3,684 14,062 652.00 3,684 14,062 678.00 3,684 14,062 652.50 3,684 14,062 678.50 3,684 14,062 653.00 3,684 14,062 679.00 3,684 14,062 653.50 3,684 14,062 679.50 3,684 14,062 654.00 3,684 14,062 680.00 3,684 14,062 654.50 3,684 14,062 680.50 3,684 14,062 655.00 3,684 14,062 681.00 3,684 14,062 655.50 3,684 14,062 681.50 3,684 14,062 656.00 3,684 14,062 682.00 3,684 14,062 656.50 3,684 14,062 682.50 3,684 14,062 657.00 3,684 14,062 683.00 3,684 14,062 657.50 3,684 14,062 683.50 3,684 14,062 658.00 3,684 14,062 684.00 3,684 14,062 658.50 3,684 14,062 684.50 3,684 14,062 659.00 3,684 14,062 685.00 3,684 14,062 659.50 3,684 14,062 685.50 3,684 14,062 660.00 3,684 14,062 660.50 3,684 14,062 661.00 3,684 14,062 661.50 3,684 14,062 662.00 3,684 14,062 662.50 3,684 14,062 663.00 3,684 14,062 663.50 3,684 14,062 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 123 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment7S: Post Developed RunoffArea=15.300 ac 65.00% Impervious Runoff Depth>9.90" Flow Length=1,300' Tc=15.4 min CN=85 Runoff=191.77 cfs 12.627 af Subcatchment8S: Actual Pre-Developed Runoff Area=5.900 ac 0.00% Impervious Runoff Depth>6.12" Flow Length=975' Tc=21.4 min CN=58 Runoff=41.90 cfs 3.011 af Subcatchment16S: Disturbed Area Runoff Area=19.250 ac 0.00% Impervious Runoff Depth>10.24" Flow Length=745' Tc=17.2 min CN=88 Runoff=233.91 cfs 16.431 af Reach 21R: Pond Outfall Ditch Avg. Flow Depth=3.21' Max Vel=8.15 fps Inflow=131.86 cfs 9.779 af n=0.035 L=50.0' S=0.0620 '/' Capacity=19.29 cfs Outflow=131.87 cfs 9.778 af Reach 22R: Pond Outfall Ditch Avg. Flow Depth=4.70' Max Vel=5.27 fps Inflow=131.87 cfs 9.778 af n=0.035 L=100.0' S=0.0250 '/' Capacity=12.25 cfs Outflow=131.99 cfs 9.775 af Pond 14P: 11-28-2014Asbuilts Peak Elev=1,463.92' Storage=209.716 cf Inflow=233.91 cfs 16.431 af Outflow=282.91 cfs 16.138 af Pond 17P: 50 Buffer Wet Pond -4*WQV Peak Elev=652.15' Storage=249.867 cf Inflow=191.77 cfs 12.659 af Primary=131.86 cfs 9.779 af Secondary=11.24 cfs 0.160 af Outflow=143.10 cfs 9.939 af Pond 19P: Forebay Peak Elev=705.74' Storage=14.062 cf Inflow=191.77 cfs 12.627 af Outflow=191.77 cfs 12.659 af Total Runoff Area = 40.450 ac Runoff Volume = 32.069 af Average Runoff Depth = 9.51" 75.41% Pervious = 30.505 ac 24.59% Impervious = 9.945 ac WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 124 Summary for Subcatchment 7S: Post Developed Drainage Sediment Basin Sized to accomodate Runoff = 191.77 cfs @ 12.07 hrs, Volume= 12.627 af, Depth> 9.90" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 500-yr Rainfall=12.49" Area (ac) CN Description * 15.300 85 1/8 acre lots, 65% imp, HSG B 5.355 35.00% Pervious Area 9.945 65.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.1 200 0.0400 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 3.68" 1.1 100 0.0100 1.50 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.2 1,000 0.0150 7.64 24.01 Pipe Channel, 24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50' n= 0.015 15.4 1,300 Total Subcatchment 7S: Post Developed Drainage Hydrograph I I 210=/ 113 Runoff 200= 191.77 cfs 190- = Ru not#=191;77 cfs 180- 170= 0.0, Type I l 24-hr 150 500-yr Rainfall=12.49" 140= RS Runoff Area=15.300ac w301 12o Runoff Volume=12:627 af 7 � 3 " Runoff Depth>9.90" 0 100= so � � � , Flow Length=1,300' 70- Tc=15.4 min 5°= CN=85 407 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 125 Summary for Subcatchment 8S: Actual Pre-Developed Drainage Sediment Basin Sized to accomodate Runoff = 41.90 cfs @ 12.15 hrs, Volume= 3.011 af, Depth> 6.12" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type Il 24-hr 500-yr Rainfall=12.49" Area (ac) CN Description * 5.900 58 Woods, Good, HSG B/C weighted 5.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.3 300 0.0370 0.33 Sheet Flow, Range n= 0.130 P2= 3.68" 6.1 675 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 21.4 975 Total Subcatchment 8S: Actual Pre-Developed Drainage Hydrograph 46M Runoff a4 41.90 cfs 40. Runoff=41 :90 cfs 364: Type 1124-h r 324 500-yr Rainfall=12.49" 30= ' Runoff Are =5.90 28- - � 0 ac 26 Runoff Volume=3.,011 af 7 3 0 22 RunoffLL 20. Depth>6.1'2" 18- I Flovjr Length=975' Tc=21.4 m i n 10 CN=58 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) . WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 126 Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff = 233.91 cfs @ 12.09 hrs, Volume= 16.431 af, Depth>10.24" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 500-yr Rainfall=12.49" Area (ac) CN Description * 19.250 88 Fallow, bare soil, HSG B/C 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0.0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68" 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total Subcatchment 16S: Disturbed Area Hydrograph 260 1 0 Runoff 250 233.91 cfs ` 230= 04 Runoff=233.91 cfs 220= 1 210: ' Type Ii 24-hr 200ri 190° 500-yr Rainfall=12,49" 180: 170= I I � Y Runoff Area=19.250 lac 160= I � r . 150= 431' af v 140 Runoff, Volume-16 3 130, Runoff Depth>'10.24" a 120= 110 i 100. Flow Length=745' 90= 80_ P'vTc=172 min 60C N=88 50 1 30 ''`; 20 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 127 Summary for Reach 21R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 7.67" for 500-yr event Inflow = 131.86 cfs @ 12.17 hrs, Volume= 9.779 of Outflow = 131.87 cfs @ 12.20 hrs, Volume= 9.778 af, Atten= 0%, Lag= 2.0 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 8.15 fps, Min. Travel Time= 0.1 min Avg. Velocity = 3.99 fps, Avg. Travel Time= 0.2 min Peak Storage= 809 cf @ 12.20 hrs Average Depth at Peak Storage= 3.21' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 19.29 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 50.0' Slope= 0.0620 '/' Inlet Invert= 635.10', Outlet Invert= 632.00' } i mask WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 128 Reach 21R: Pond Outfall Ditch Hydrograph / 111 Inflow 111 RR rf ®Outflow 7 131.8 � cfs Inflow Area=15,300 ac 130_ 120Inflow=X131.86 cfs 110. " Outflow=l 31.87 cfs 100„.. Avg. Flow Depth=3.21' 9°- MaX.Vel=8.15 fps3. .. n=0.0;35 70= 60- L=50,0' 50- w; S=0.0620 '/' 40= Capacity=19..29 -cfs 30 20� I II � � I 10- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 21R: Pond Outfall Ditch Stage-Discharge 1 0, 0 `Primary 1 //Z .4124) _ I I I I I I .<i 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 129 Stage-Area-Storage for Reach 21R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 635.10 0.0 0 635.62 0.8 41 635.11 0.0 0 635.63 0.8 42 635.12 0.0 0 635.64 0.9 44 635.13 0.0 0 635.65 0.9 45 635.14 0.0 0 635.66 0.9 47 635.15 0.0 0 635.67 1.0 49 635.16 0.0 1 635.68 1.0 50 635.17 0.0 1 635.69 1.0 52 635.18 0.0 1 635.70 1.1 54 635.19 0.0 1 635.71 1.1 56 635.20 0.0 2 635.72 1.2 58 635.21 0.0 2 635.73 1.2 60 635.22 0.0 2 635.74 1.2 61 635.23 0.1 3 635.75 1.3 63 635.24 0.1 3 635.76 1.3 65 635.25 0.1 3 635.77 1.3 67 635.26 0.1 4 635.78 1.4 69 635.27 0.1 4 635.79 1.4 71 635.28 0.1 5 635.80 1.5 74 635.29 0.1 5 635.81 1.5 76 635.30 0.1 6 635.82 1.6 78 635.31 0.1 7 635.83 1.6 80 635.32 0.1 7 635.84 1.6 82 635.33 0.2 8 635.85 1.7 84 635.34 0.2 9 635.86 1.7 87 635.35 0.2 9 635.87 1.8 89 635.36 0.2 10 635.88 1.8 91 635.37 0.2 11 635.89 1.9 94 635.38 0.2 12 635.90 1.9 96 635.39 0.3 13 635.91 2.0 98 635.40 0.3 13 635.92 2.0 101 635.41 0.3 14 635.93 2.1 103 635.42 0.3 15 635.94 2.1 106 635.43 0.3 16 635.95 2.2 108 635.44 0.3 17 635.96 2.2 111 635.45 0.4 18 635.97 2.3 114 635.46 0.4 19 635.98 2.3 116 635.47 0.4 21 635.99 2.4 119 635.48 0.4 22 636.00 2.4 122 635.49 0.5 23 636.01 2.5 124 635.50 0.5 24 636.02 2.5 127 635.51 0.5 25 636.03 2.6 130 635.52 0.5 26 636.04 2.7 133 635.53 0.6 28 636.05 2.7 135 635.54 0.6 29 636.06 2.8 138 635.55 0.6 30 636.07 2.8 141 635.56 0.6 32 636.08 2.9 144 635.57 0.7 33 636.09 2.9 147 635.58 0.7 35 636.10 3.0 150 635.59 0.7 36 635.60 0.8 38 635.61 0.8 39 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 130 Summary for Reach 22R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 7.67" for 500-yr event Inflow = 131.87 cfs @ 12.20 hrs, Volume= 9.778 af Outflow = 131.99 cfs @ 12.20 hrs, Volume= 9.775 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 5.27 fps, Min. Travel Time= 0.3 min Avg. Velocity = 2.81 fps, Avg. Travel Time= 0.6 min Peak Storage= 2,507 cf @ 12.20 hrs Average Depth at Peak Storage= 4.70' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 12.25 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 100.0' Slope= 0.0250 '/' Inlet Invert= 632.00', Outlet Invert= 629.50' WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 131 Reach 22R: Pond Outfall Ditch Hydrograph 111 R7 r•f ■Inflow Outflow 140= 131.99 cfs Inflow Area=15.300 ac 130= 1 1 1207 Inflgw=131.87 cfs 110- Outflow=131.199 cfs 100= Avg. Flow Depth=4.70' 90- ao= Mast VeI=5.27 fps I I 70= n=0.035 " 60� L=100'1.0' 50= S=0.0250 '/' 40 Capacityr12.25 cfs 30- 20� I 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 22R: Pond Outfall Ditch Stage-Discharge ®Primary - / I d I I _ I aI o I I I/ I 0 1 2 3 4 5 6 7 8 9 10 11 12 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 132 Stage-Area-Storage for Reach 22R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 632.00 0.0 0 632.52 0.8 81 632.01 0.0 0 632.53 0.8 84 632.02 0.0 0 632.54 0.9 87 632.03 0.0 0 632.55 0.9 91 632.04 0.0 0 632.56 0.9 94 632.05 0.0 1 632.57 1.0 97 632.06 0.0 1 632.58 1.0 101 632.07 0.0 1 632.59 1.0 104 632.08 0.0 2 632.60 1.1 108 632.09 0.0 2 632.61 1.1 112 632.10 0.0 3 632.62 1.2 115 632.11 0.0 4 632.63 1.2 119 632.12 0.0 4 632.64 1.2 123 632.13 0.1 5 632.65 1.3 127 632.14 0.1 6 632.66 1.3 131 632.15 0.1 7 632.67 1.3 135 632.16 0.1 8 632.68 1.4 139 632.17 0.1 9 632.69 1.4 143 632.18 0.1 10 632.70 1.5 147 632.19 0.1 11 632.71 1.5 151 632.20 0.1 12 632.72 1.6 156 632.21 0.1 13 632.73 1.6 160 632.22 0.1 15 632.74 1.6 164 632.23 0.2 16 632.75 1.7 169 632.24 0.2 17 632.76 1.7 173 632.25 0.2 19 632.77 1.8 178 632.26 0.2 20 632.78 1.8 183 632.27 0.2 22 632.79 1.9 187 632.28 0.2 24 632.80 1.9 192 632.29 0.3 25 632.81 2.0 197 632.30 0.3 27 632.82 2.0 202 632.31 0.3 29 632.83 2.1 207 632.32 0.3 31 632.84 2.1 212 632.33 0.3 33 632.85 2.2 217 632.34 0.3 35 632.86 2.2 222 632.35 0.4 37 632.87 2.3 227 632.36 0.4 39 632.88 2.3 232 632.37 0.4 41 632.89 2.4 238 632.38 0.4 43 632.90 2.4 243 632.39 0.5 46 632.91 2.5 248 632.40 0.5 48 632.92 2.5 254 632.41 0.5 50 632.93 2.6 259 632.42 0.5 53 632.94 2.7 265 632.43 0.6 55 632.95 2.7 271 632.44 0.6 58 632.96 2.8 276 632.45 0.6 61 632.97 2.8 282 632.46 0.6 63 632.98 2.9 288 632.47 0.7 66 632.99 2.9 294 632.48 0.7 69 633.00 3.0 300 632.49 0.7 72 632.50 0.8 75 632.51 0.8 78 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 133 Summary for Pond 14P: 11-28-2014 Asbuilts Inflow Area = 19.250 ac, 0.00% Impervious, Inflow Depth > 10.24" for 500-yr event Inflow = 233.91 cfs @ 12.09 hrs, Volume= 16.431 af Outflow = 282.91 cfs @ 12.10 hrs, Volume= 16.138 af, Atten= 0%, Lag= 0.7 min Primary = 282.91 cfs @ 12.10 hrs, Volume= 16.138 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 641.07' Surf.Area= 19,161 sf Storage= 76,030 cf Peak Elev= 1,463.92' @ 12.10 hrs Surf.Area= 25,300 sf Storage= 209,716 cf (133,686 cf above start) Plug-Flow detention time= 99.9 min calculated for 14.342 af(87% of inflow) Center-of-Mass det. time= 31.8 min ( 779.8 - 748.0 ) Volume Invert Avail.Storage Storage Description #1 636.50' 209,716 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.50 12,808 0 0 637.00 14,843 6,913 6,913 638.00 15,878 15,361 22,273 639.00 16,936 16,407 38,680 640.00 17,999 17,468 56,148 641.00 19,089 18,544 74,692 642.00 20,111 19,600 94,292 643.00 21,638 20,875 115,166 644.00 22,610 22,124 137,290 645.00 23,611 23,111 160,401 646.00 24,860 24,236 184,636 647.00 25,300 25,080 209,716 Device Routing Invert Outlet Devices #1 Primary 636.11' 24.0" Round Culvert L= 110.0' CMP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 636.11' /635.04' S= 0.0097 '/' Cc= 0.900 n= 0.025 Corrugated metal, Flow Area= 3.14 sf #2 Device 1 641.07' 30.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=279.71 cfs @ 12.10 hrs HW=1,445.76' (Free Discharge) t-Culvert (Barrel Controls 279.71 cfs @ 89.03 fps) 2=Orifice/Grate (Passes 279.71 cfs of 669.95 cfs potential flow) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 134 Pond 14P: 11-28-2014 Asbuilts Hydrograph /I I ®Inflow - 0 Primary 300= 282.91 cfs Infl,ow'�Area-19. 50 ac 280 260=- 1 I 23 1 cfs Inflow=233.91 cfs 240= Primary=282.91 cfs 220 200_ Peak Elev=1 463.9 92' 180: Storage=209,716 cf 160=- 140- I 120= � 100 80= � 60= 20 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 14P: 11-28-2014 Asbuilts Stage-Discharge 1,450= O Primary` 1,400= 1,350: 1,300= 1,250 1,200: -- 1,150 1,100:71 - - - - 0 1,050 - - - - 1,000. w 950= 900 850-: t f 800= 750.: ,./v 700-J _ ,way` Orifice/Grate 650 * 0 50 100 150 200 250 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 135 Stage-Area-Storage for Pond 14P: 11-28-2014 Asbuilts Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.50 12,808 0 1,070.70 25,300 209,716 644.85 23,461 156,870 1,079.05 25,300 209,716 653.20 25,300 209,716 1,087.40 25,300 209,716 661.55 25,300 209,716 1,095.75 25,300 209,716 669.90 25,300 209,716 1,104.10 25,300 209,716 678.25 25,300 209,716 1,112.45 25,300 209,716 686.60 25,300 209,716 1,120.80 25,300 209,716 694.95 25,300 209,716 1,129.15 25,300 209,716 703.30 25,300 209,716 1,137.50 25,300 209,716 711.65 25,300 209,716 1,145.85 25,300 209,716 720.00 25,300 209,716 1,154.20 25,300 209,716 728.35 25,300 209,716 1,162.55 25,300 209,716 736.70 25,300 209,716 1,170.90 25,300 209,716 745.05 25,300 209,716 1,179.25 25,300 209,716 753.40 25,300 209,716 1,187.60 25,300 209,716 761.75 25,300 209,716 1,195.95 25,300 209,716 770.10 25,300 209,716 1,204.30 25,300 209,716 778.45 25,300 209,716 1,212.65 25,300 209,716 786.80 25,300 209,716 1,221.00 25,300 209,716 795.15 25,300 209,716 1,229.35 25,300 209,716 803.50 25,300 209,716 1,237.70 25,300 209,716 811.85 25,300 209,716 1,246.05 25,300 209,716 820.20 25,300 209,716 1,254.40 25,300 209,716 828.55 25,300 209,716 1,262.75 25,300 209,716 836.90 25,300 209,716 1,271.10 25,300 209,716 845.25 25,300 209,716 1,279.45 25,300 209,716 853.60 25,300 209,716 1,287.80 25,300 209,716 861.95 25,300 209,716 1,296.15 25,300 209,716 870.30 25,300 209,716 1,304.50 25,300 209,716 878.65 25,300 209,716 1,312.85 25,300 209,716 887.00 25,300 209,716 1,321.20 25,300 209,716 895.35 25,300 209,716 1,329.55 25,300 209,716 903.70 25,300 209,716 1,337.90 25,300 209,716 912.05 25,300 209,716 1,346.25 25,300 209,716 920.40 25,300 209,716 1,354.60 25,300 209,716 928.75 25,300 209,716 1,362.95 25,300 209,716 937.10 25,300 209,716 1,371.30 25,300 209,716 945.45 25,300 209,716 1,379.65 25,300 209,716 953.80 25,300 209,716 1,388.00 25,300 209,716 962.15 25,300 209,716 1,396.35 25,300 209,716 970.50 25,300 209,716 1,404.70 25,300 209,716 978.85 25,300 209,716 1,413.05 25,300 209,716 987.20 25,300 209,716 1,421.40 25,300 209,716 995.55 25,300 209,716 1,429.75 25,300 209,716 1,003.90 25,300 209,716 1,438.10 25,300 209,716 1,012.25 25,300 209,716 1,446.45 25,300 209,716 1,020.60 25,300 209,716 1,454.80 25,300 209,716 1,028.95 25,300 209,716 1,463.15 25,300 209,716 1,037.30 25,300 209,716 1,045.65 25,300 209,716 1,054.00 25,300 209,716 1,062.35 25,300 209,716 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 136 Summary for Pond 17P: 50 Buffer Wet Pond - 4*WQV Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 9.93" for 500-yr event Inflow = 191.77 cfs @ 12.07 hrs, Volume= 12.659 of Outflow = 143.10 cfs @ 12.17 hrs, Volume= 9.939 af, Atten= 25%, Lag= 6.0 min Primary = 131.86 cfs @ 12.17 hrs, Volume= 9.779 af Secondary = 11.24 cfs @ 12.17 hrs, Volume= 0.160 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs/2 Starting Elev= 645.00' Surf.Area= 14,148 sf Storage= 59,616 cf Peak Elev= 652.15' @ 12.17 hrs Surf.Area= 36,797 sf Storage= 249,867 cf (190,251 cf above start) Flood Elev= 652.75' Surf.Area= 38,322 sf Storage= 272,428 cf (212,813 cf above start) Plug-Flow detention time= 133.6 min calculated for 8.561 af(68% of inflow) Center-of-Mass det. time= 46.8 min ( 797.2 - 750.4 ) Volume Invert Avail.Storage Storage Description #1 636.00' 282,088 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.00 2,115 0 0 638.00 3,986 6,101 6,101 640.00 5,861 9,847 15,948 642.00 7,877 13,738 29,686 643.00 8,913 8,395 38,081 644.00 10,004 9,459 47,540 645.00 14,148 12,076 59,616 646.00 20,082 17,115 76,731 648.00 25,067 45,149 121,880 650.00 30,518 55,585 177,465 652.00 36,418 66,936 244,401 653.00 38,957 37,688 282,088 Device Routing Invert Outlet Devices #1 Primary 635.64' 36.0" Round Culvert L= 92.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/ Outlet Invert= 635.64' /635.18' S= 0.0050 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 7.07 sf #2 Device 1 645.00' 3.0" Vert. Orifice/Grate X 2.00 columns X 3 rows with 12.0" cc spacing C= 0.600 #3 Device 1 650.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Secondary 651.50' 8.0' long x 18.0' breadth Broad-Crested Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 137 Primary OutFlow Max=131.77 cfs @ 12.17 hrs HW=652.13' (Free Discharge) L =Culvert (Inlet Controls 131.77 cfs @ 18.64 fps) 2=Orifice/Grate (Passes < 3.47 cfs potential flow) 3 Orifice/Grate (Passes < 137.98 cfs potential flow) econdary OutFlow Max=10.77 cfs @ 12.17 hrs HW=652.13' (Free Discharge) 7-4=Broad-Crested Weir (Weir Controls 10.77 cfs @ 2.14 fps) Pond 17P: 50 Buffer Wet Pond - 4*WQV Hydrograph 191.77 cfs - ■inflow 0 Outflow Inflow Arca=15.3'00 acPrimary Secondary 210 200- I Inflo*=191.77 cfs 190= 18°= 170= 143.10 cfs Outflow=143.10 cfs � 160- 131.86 cfs Primary=131.86 cfs 150 140 Secondary=11.24 cfs 130_ 120= Peak EIev=652.15' 110 100= 01Storage=249,867 cf 80= 601 30 � W4CIPZ.fr.477:Ze.51.1:09:;W:6"..1Z/ zo 11.24 cfs ' J 0` 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 138 Pond 17P: 50 Buffer Wet Pond - 4*WQV Stage-Discharge ArAllPriar 653 Secondary Crested Weir:,, ms . 652 _ e r 'Orifice/Grate 651 - %t 650 IIIPPF 649 648 ', 647 a f Orifice/Grate .2 646 c 645 fa 644 m 643 w 642 641 640 l 639 638 637 0 20 40 60 80 100 120 140 160 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 139 Stage-Area-Storage for Pond 17P: 50 Buffer Wet Pond - 4*WQV Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.00 2,115 0 646.40 21,079 84,963 636.20 2,302 442 646.60 21,578 89,228 636.40 2,489 921 646.80 22,076 93,594 636.60 2,676 1,437 647.00 22,575 98,059 636.80 2,863 1,991 647.20 23,073 102,624 637.00 3,051 2,583 647.40 23,571 107,288 637.20 3,238 3,212 647.60 24,070 112,052 637.40 3,425 3,878 647.80 24,568 116,916 637.60 3,612 4,581 648.00 25,067 121,880 637.80 3,799 5,323 648.20 25,612 126,947 638.00 3,986 6,101 648.40 26,157 132,124 638.20 4,174 6,917 648.60 26,702 137,410 638.40 4,361 7,770 648.80 27,247 142,805 638.60 4,549 8,661 649.00 27,793 148,309 638.80 4,736 9,590 649.20 28,338 153,922 639.00 4,924 10,556 649.40 28,883 159,644 639.20 5,111 11,559 649.60 29,428 165,475 639.40 5,298 12,600 649.80 29,973 171,415 639.60 5,486 13,679 650.00 30,518 177,465 639.80 5,673 14,795 650.20 31,108 183,627 640.00 5,861 15,948 650.40 31,698 189,908 640.20 6,063 17,140 650.60 32,288 196,306 640.40 6,264 18,373 650.80 32,878 202,823 640.60 6,466 19,646 651.00 33,468 209,458 640.80 6,667 20,959 651.20 34,058 216,210 641.00 6,869 22,313 651.40 34,648 223,081 641.20 7,071 23,707 651.60 35,238 230,069 641.40 7,272 25,141 651.80 35,828 237,176 641.60 7,474 26,616 652.00 36,418 244,401 641.80 7,675 28,131 652.20 36,926 251,735 642.00 7,877 29,686 652.40 37,434 259,171 642.20 8,084 31,282 652.60 37,941 266,708 642.40 8,291 32,920 652.80 38,449 274,347 642.60 8,499 34,599 653.00 38,957 282,088 642.80 8,706 36,319 643.00 8,913 38,081 643.20 9,131 39,885 643.40 9,349 41,733 643.60 9,568 43,625 643.80 9,786 45,561 644.00 10,004 47,540 644.20 10,833 49,623 644.40 11,662 51,873 644.60 12,490 54,288 644.80 13,319 56,869 645.00 14,148 59,616 645.20 15,335 62,564 645.40 16,522 65,749 645.60 17,708 69,172 645.80 18,895 72,833 646.00 20,082 76,731 646.20 20,581 80,797 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 140 Summary for Pond 19P: Forebay Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 9.90" for 500-yr event Inflow = 191.77 cfs @ 12.07 hrs, Volume= 12.627 of Outflow = 191.77 cfs @ 12.07 hrs, Volume= 12.659 af, Atten= 0%, Lag= 0.0 min Primary = 191.77 cfs @ 12.07 hrs, Volume= 12.659 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 645.00' Surf.Area= 3,684 sf Storage= 14,062 cf Peak Elev= 705.74' @ 12.07 hrs Surf.Area= 3,684 sf Storage= 14,062 cf Plug-Flow detention time= 18.9 min calculated for 12.295 af(97% of inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow) Volume Invert Avail.Storage Storage Description #1 638.00' 14,062 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 638.00 608 0 0 640.00 1,290 1,898 1,898 642.00 2,157 3,447 5,345 644.00 3,145 5,302 10,647 645.00 3,684 3,415 14,062 Device Routing Invert Outlet Devices #1 Primary 644.75' 20.0' long x 0.25' rise Sharp-Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=188.66 cfs @ 12.07 hrs HW=703.87' (Free Discharge) t--1=Sharp-Crested Vee/Trap Weir(Orifice Controls 188.66 cfs @ 37.73 fps) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 141 Pond 19P: Forebay Hydrograph / rf II Inflow 210- 1 Q1 77 o Primary 290; l' 191.77cfs 'Infow;Arca= 3',0 15. 0 ac 180 Inflow=191 77 cfs 170 160- Primary=191.77 cfs 150'_ 140- Peak Elev=705.74' w120.7 ra a=14 062 110= StQ g , cf. . 0 100= 80= 70= 60-3 50- 40 30 20� 10: -' 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 19P: Forebay Stage-Discharge 705 ` 0 Primary 1 700 6951- 690E, 685- 680- 675 o 670- ani ui 665- 660-_' • 655- 650.1'1; 645_ Sharp-Crested Vee/Trap Weir 640 r 0 20 40 60 80 100 120 140 160 180 Discharge (cfs) m.. WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 500-yr Rainfall=12.49" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 142 Stage-Area-Storage for Pond 19P: Forebay Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 638.00 608 0 674.40 3,684 14,062 638.70 847 509 675.10 3,684 14,062 639.40 1,085 1,185 675.80 3,684 14,062 640.10 1,333 2,029 676.50 3,684 14,062 640.80 1,637 3,069 677.20 3,684 14,062 641.50 1,940 4,321 677.90 3,684 14,062 642.20 2,256 5,786 678.60 3,684 14,062 642.90 2,602 7,486 679.30 3,684 14,062 643.60 2,947 9,429 680.00 3,684 14,062 644.30 3,307 11,615 680.70 3,684 14,062 645.00 3,684 14,062 681.40 3,684 14,062 645.70 3,684 14,062 682.10 3,684 14,062 646.40 3,684 14,062 682.80 3,684 14,062 647.10 3,684 14,062 683.50 3,684 14,062 647.80 3,684 14,062 684.20 3,684 14,062 648.50 3,684 14,062 684.90 3,684 14,062 649.20 3,684 14,062 685.60 3,684 14,062 649.90 3,684 14,062 686.30 3,684 14,062 650.60 3,684 14,062 687.00 3,684 14,062 651.30 3,684 14,062 687.70 3,684 14,062 652.00 3,684 14,062 688.40 3,684 14,062 652.70 3,684 14,062 689.10 3,684 14,062 653.40 3,684 14,062 689.80 3,684 14,062 654.10 3,684 14,062 690.50 3,684 14,062 654.80 3,684 14,062 691.20 3,684 14,062 655.50 3,684 14,062 691.90 3,684 14,062 656.20 3,684 14,062 692.60 3,684 14,062 656.90 3,684 14,062 693.30 3,684 14,062 657.60 3,684 14,062 694.00 3,684 14,062 658.30 3,684 14,062 694.70 3,684 14,062 659.00 3,684 14,062 695.40 3,684 14,062 659.70 3,684 14,062 696.10 3,684 14,062 660.40 3,684 14,062 696.80 3,684 14,062 661.10 3,684 14,062 697.50 3,684 14,062 661.80 3,684 14,062 698.20 3,684 14,062 662.50 3,684 14,062 698.90 3,684 14,062 663.20 3,684 14,062 699.60 3,684 14,062 663.90 3,684 14,062 700.30 3,684 14,062 664.60 3,684 14,062 701.00 3,684 14,062 665.30 3,684 14,062 701.70 3,684 14,062 666.00 3,684 14,062 702.40 3,684 14,062 666.70 3,684 14,062 703.10 3,684 14,062 667.40 3,684 14,062 703.80 3,684 14,062 668.10 3,684 14,062 704.50 3,684 14,062 668.80 3,684 14,062 705.20 3,684 14,062 669.50 3,684 14,062 670.20 3,684 14,062 670.90 3,684 14,062 671.60 3,684 14,062 672.30 3,684 14,062 673.00 3,684 14,062 673.70 3,684 14,062 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type I124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 143 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind method - Pond routing by Stor-Ind method Subcatchment7S: Post Developed Runoff Area=15.300 ac 65.00% Impervious Runoff Depth>11.47" Flow Length=1,300' Tc=15.4 min CN=85 Runoff=220.59 cfs 14.630 af Subcatchment8S: Actual Pre-Developed Runoff Area=5.900 ac 0.00% Impervious Runoff Depth>7.50" Flow Length=975' Tc=21.4 min CN=58 Runoff=51.19 cfs 3.688 af Subcatchment16S: Disturbed Area RunoffArea=19.250 ac 0.00% Impervious Runoff Depth>11.81" Flow Length=745' Tc=17.2 min CN=88 Runoff=268.11 cfs 18.947 af Reach 21R: Pond Outfall Ditch Avg. Flow Depth=3.25' Max Vel=8.16 fps Inflow=133.86 cfs 11.486 af n=0.035 L=50.0' S=0.0620'/' Capacity=19.29 cfs Outflow=133.92 cfs 11.485 af Reach 22R: Pond Outfall Ditch Avg. Flow Depth=4.76' Max Vel=5.27 fps Inflow=133.92 cfs 11.485 af n=0.035 L=100.0' S=0.0250 'I' Capacity=12.25 cfs Outflow=133.91 cfs 11.483 af Pond 14P: 11-28-2014Asbuilts Peak Elev=2,692.86' Storage=209.716 cf Inflow=268.11 cfs 18.947 af Outflow=445.96 cfs 18.616 af Pond 17P: 50 Buffer Wet Pond -4*WQV Peak Elev=652.61' Storage=266.989 cf Inflow=220.69 cfs 14.660 af Primary=133.86 cfs 11.486 af Secondary=24.58 cfs 0.442 af Outflow=158.43 cfs 11.928 af Pond 19P: Forebay Peak Elev=725.48' Storage=14.062 cf Inflow=220.59 cfs 14.630 af Outflow=220.69 cfs 14.660 af Total Runoff Area = 40.450 ac Runoff Volume = 37.266 af Average Runoff Depth = 11.06" 75.41% Pervious = 30.505 ac 24.59% Impervious = 9.945 ac WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 144 Summary for Subcatchment 7S: Post Developed Drainage Sediment Basin Sized to accomodate Runoff = 220.59 cfs @ 12.07 hrs, Volume= 14.630 af, Depth>11.47" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1000-yr Rainfall=14.21" Area (ac) CN Description * 15.300 85 1/8 acre lots, 65% imp, HSG B 5.355 35.00% Pervious Area 9.945 65.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.1 200 0.0400 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 3.68" 1.1 100 0.0100 1.50 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.2 1,000 0.0150 7.64 24.01 Pipe Channel, 24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50' n= 0.015 15.4 1,300 Total Subcatchment 7S: Post Developed Drainage Hydrograph ®Runoff / 230= cfs. 220.59 230= � � � � Runoff-7220;59_ cfs 220- ,. 220010: Type 1' 124-hr 190- . 'd 180 1000-yr Rainfall=-714.21" 170- 160= Runoff A!ear15.300 lac 150. �9 • 140: Runoff Volume'=14:,630af • 130- 3 120= Runoff Depth>11.47" ;oo= Flow Length=1,300' 80= Tc=15 4 min CN=85 50= 30 20 (7` 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 145 Summary for Subcatchment 8S: Actual Pre-Developed Drainage Sediment Basin Sized to accomodate Runoff = 51.19 cfs @ 12.14 hrs, Volume= 3.688 af, Depth> 7.50" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1000-yr Rainfall=14.21" Area (ac) CN Description * 5.900 58 Woods, Good, HSG B/C weighted 5.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.3 300 0.0370 0.33 Sheet Flow, Range n= 0.130 P2= 3.68" 6.1 675 0.0700 1.85 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 21.4 975 Total Subcatchment 8S: Actual Pre-Developed Drainage Hydrograph 55: 51.19 cfs ®Runoff 50Runoff=51 .,19 cfs 45- Type II 24-hr 40 N � 4. 1000-yr Rainfall=14.21" 35= _ I Runoff Area=5.900 ac ' 3o_ Runoff Volume=3:688 of 25- I Runoff Depth>7.50" 20- Flovy Length=975' Tc--21 15 ,, .4 min CN=58 5 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 146 Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff = 268.11 cfs @ 12.09 hrs, Volume= 18.947 af, Depth>11.81" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1000-yr Rainfall=14.21" Area (ac) CN Description 19.250 88 Fallow, bare soil, HSG B/C 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0.0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68" 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total Subcatchment 16S: Disturbed Area Hydrograph 300 0 Runoff 280= ' 268.11 cfs 2607 Runo ff=268:11 cfs 240= Type II 241-hr 220= 1000-yr Rainfall='1 .21 200 Runoff Area=19.250 ac 180- 160= Runoff Volu_me'=18947 af 140 Runoff Depth>'11.81" 0 r _ 120- Flow Length=745' � ��. 1002:4Tc=17`.2 min 80-' CN 88 40 20 • ' ate 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 147 Summary for Reach 21R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 9.01" for 1000-yr event Inflow = 133.86 cfs @ 12.17 hrs, Volume= 11.486 af Outflow = 133.92 cfs @ 12.17 hrs, Volume= 11.485 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 8.16 fps, Min. Travel Time= 0.1 min Avg. Velocity = 4.14 fps, Avg. Travel Time= 0.2 min Peak Storage= 821 cf @ 12.17 hrs Average Depth at Peak Storage= 3.25' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 19.29 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 50.0' Slope= 0.0620 '/' Inlet Invert= 635.10', Outlet Invert= 632.00' T �.n WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 148 Reach 21R: Pond Outfall Ditch Hydrograph I i , ®Inflow 1 11'1 RR rfS 0 Outflow 140, 133.92 cfs I Inflow Area=15.300 ;ac 130= I nflpw=133.,86 cfs 120: I 110= Outflow=133. 2 #s ,0°? CS:, Avg. Depth�=3.25' 90= MaX Ve'�I=_8.16 fps 80-_. t t I n=0.035 070 �� LL - 60 L= 50.0' 50- S=0.0620 'I' 40- I Capacity=19.29 cfs - IL, I 20-1 rz 1°- �`� •£+��ea'dxsn., Cs• ss aamY, ps,l 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 21R: Pond Outfall Ditch Stage-Discharge 1I is Primary) r 15. 0 • 0 1 2 3 4 5 6 7 8 . 9 10 11 „ 12 . 13 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 149 Stage-Area-Storage for Reach 21R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 635.10 0.0 0 635.62 0.8 41 635.11 0.0 0 635.63 0.8 42 635.12 0.0 0 635.64 0.9 44 635.13 0.0 0 635.65 0.9 45 635.14 0.0 0 635.66 0.9 47 635.15 0.0 0 635.67 1.0 49 635.16 0.0 1 635.68 1.0 50 635.17 0.0 1 635.69 1.0 52 635.18 0.0 1 635.70 1.1 54 635.19 0.0 1 635.71 1.1 56 635.20 0.0 2 635.72 1.2 58 635.21 0.0 2 635.73 1.2 60 635.22 0.0 2 635.74 1.2 61 635.23 0.1 3 635.75 1.3 63 635.24 0.1 3 635.76 1.3 65 635.25 0.1 3 635.77 1.3 67 635.26 0.1 4 635.78 1.4 69 635.27 0.1 4 635.79 1.4 71 635.28 0.1 5 635.80 1.5 74 635.29 0.1 5 635.81 1.5 76 635.30 0.1 6 635.82 1.6 78 635.31 0.1 7 635.83 1.6 80 635.32 0.1 7 635.84 1.6 82 635.33 0.2 8 635.85 1.7 84 635.34 0.2 9 635.86 1.7 87 635.35 0.2 9 635.87 1.8 89 635.36 0.2 10 635.88 1.8 91 635.37 0.2 11 635.89 1.9 94 635.38 0.2 12 635.90 1.9 96 635.39 0.3 13 635.91 2.0 98 635.40 0.3 13 635.92 2.0 101 635.41 0.3 14 635.93 2.1 103 635.42 0.3 15 635.94 2.1 106 635.43 0.3 16 635.95 2.2 108 635.44 0.3 17 635.96 2.2 111 635.45 0.4 18 635.97 2.3 114 635.46 0.4 19 635.98 2.3 116 635.47 0.4 21 635.99 2.4 119 635.48 0.4 22 636.00 2.4 122 635.49 0.5 23 636.01 2.5 124 635.50 0.5 24 636.02 2.5 127 635.51 0.5 25 636.03 2.6 130 635.52 0.5 26 636.04 2.7 133 635.53 0.6 28 636.05 2.7 135 635.54 0.6 29 636.06 2.8 138 635.55 0.6 30 636.07 2.8 141 635.56 0.6 32 636.08 2.9 144 635.57 0.7 33 636.09 2.9 147 635.58 0.7 35 636.10 3.0 150 635.59 0.7 36 635.60 0.8 38 635.61 0.8 39 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 150 Summary for Reach 22R: Pond Outfall Ditch Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 9.01" for 1000-yr event Inflow = 133.92 cfs @ 12.17 hrs, Volume= 11.485 af Outflow = 133.91 cfs @ 12.19 hrs, Volume= 11.483 af, Atten= 0%, Lag= 1.2 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Max. Velocity= 5.27 fps, Min. Travel Time= 0.3 min Avg. Velocity = 2.91 fps, Avg. Travel Time= 0.6 min Peak Storage= 2,542 cf @ 12.19 hrs Average Depth at Peak Storage= 4.76' Bank-Full Depth= 1.00' Flow Area= 3.0 sf, Capacity= 12.25 cfs 0.00' x 1.00' deep channel, n= 0.035 Side Slope Z-value= 3.0 '/' Top Width= 6.00' Length= 100.0' Slope= 0.0250 '/' Inlet Invert= 632.00', Outlet Invert= 629.50' WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 151 Reach 22R: Pond Outfall Ditch Hydrograph ■Inflow I 1 Cl? rf� - Outflow 140= 133.91 cfs Inflow Area=15.300 ac 130= Inflow='133.92 cfs 120= Outflow='7110= 33.91 cfs Avg. Flow Depth=4.76' 90-- Max Ve�I= . 527f s 3 70_ n=0.035 6° L=100.0' 50a S=0.0250 'I' 40 Capacity=12.25 cfs 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Reach 22R: Pond Outfall Ditch Stage-Discharge 1 rte ' 0 Primary m t f p 0 1 2 3 4 5 6 7 8 9 10 11 12 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 152 Stage-Area-Storage for Reach 22R: Pond Outfall Ditch Elevation End-Area Storage Elevation End-Area Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 632.00 0.0 0 632.52 0.8 81 632.01 0.0 0 632.53 0.8 84 632.02 0.0 0 632.54 0.9 87 632.03 0.0 0 632.55 0.9 91 632.04 0.0 0 632.56 0.9 94 632.05 0.0 1 632.57 1.0 97 632.06 0.0 1 632.58 1.0 101 632.07 0.0 1 632.59 1.0 104 632.08 0.0 2 632.60 1.1 108 632.09 0.0 2 632.61 1.1 112 632.10 0.0 3 632.62 1.2 115 632.11 0.0 4 632.63 1.2 119 632.12 0.0 4 632.64 1.2 123 632.13 0.1 5 632.65 1.3 127 632.14 0.1 6 632.66 1.3 131 632.15 0.1 7 632.67 1.3 135 632.16 0.1 8 632.68 1.4 139 632.17 0.1 9 632.69 1.4 143 632.18 0.1 10 632.70 1.5 147 632.19 0.1 11 632.71 1.5 151 632.20 0.1 12 632.72 1.6 156 632.21 0.1 13 632.73 1.6 160 632.22 0.1 15 632.74 1.6 164 632.23 0.2 16 632.75 1.7 169 632.24 0.2 17 632.76 1.7 173 632.25 0.2 19 632.77 1.8 178 632.26 0.2 20 632.78 1.8 183 632.27 0.2 22 632.79 1.9 187 632.28 0.2 24 632.80 1.9 192 632.29 0.3 25 632.81 2.0 197 632.30 0.3 27 632.82 2.0 202 632.31 0.3 29 632.83 2.1 207 632.32 0.3 31 632.84 2.1 212 632.33 0.3 33 632.85 2.2 217 632.34 0.3 35 632.86 2.2 222 632.35 0.4 37 632.87 2.3 227 632.36 0.4 39 632.88 2.3 232 632.37 0.4 41 632.89 2.4 238 632.38 0.4 43 632.90 2.4 243 632.39 0.5 46 632.91 2.5 248 632.40 0.5 48 632.92 2.5 254 632.41 0.5 50 632.93 2.6 259 632.42 0.5 53 632.94 2.7 265 632.43 0.6 55 632.95 2.7 271 632.44 0.6 58 632.96 2.8 276 632.45 0.6 61 632.97 2.8 282 632.46 0.6 63 632.98 2.9 288 632.47 0.7 66 632.99 2.9 294 632.48 0.7 69 633.00 3.0 300 632.49 0.7 72 632.50 0.8 75 632.51 0.8 78 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 153 Summary for Pond 14P: 11-28-2014 Asbuilts Inflow Area = 19.250 ac, 0.00% Impervious, Inflow Depth > 11.81" for 1000-yr event Inflow = 268.11 cfs @ 12.09 hrs, Volume= 18.947 af Outflow = 445.96 cfs @ 12.05 hrs, Volume= 18.616 af, Atten= 0%, Lag= 0.0 min Primary = 445.96 cfs @ 12.05 hrs, Volume= 18.616 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 641.07' Surf.Area= 19,161 sf Storage= 76,030 cf Peak Elev= 2,692.86' @ 12.05 hrs Surf.Area= 25,300 sf Storage= 209,716 cf (133,686 cf above start) Plug-Flow detention time= 92.5 min calculated for 16.810 af(89% of inflow) Center-of-Mass det. time= 29.7 min ( 775.8 - 746.1 ) Volume Invert Avail.Storage Storage Description #1 636.50' 209,716 cf Custom Stage Data (Prismatic)Listed below (Recaic) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.50 12,808 0 0 637.00 14,843 6,913 6,913 638.00 15,878 15,361 22,273 639.00 16,936 16,407 38,680 640.00 17,999 17,468 56,148 641.00 19,089 18,544 74,692 642.00 20,111 19,600 94,292 643.00 21,638 20,875 115,166 644.00 22,610 22,124 137,290 645.00 23,611 23,111 160,401 646.00 24,860 24,236 184,636 647.00 25,300 25,080 209,716 Device Routing Invert Outlet Devices #1 Primary 636.11' 24.0" Round Culvert L= 110.0' CMP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 636.11' /635.04' S= 0.0097 '/' Cc= 0.900 n= 0.025 Corrugated metal, Flow Area= 3.14 sf #2 Device 1 641.07' 30.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=445.96 cfs @ 12.05 hrs HW=2,692.77' (Free Discharge) =Culvert (Barrel Controls 445.96 cfs @ 141.95 fps) 2=Orifice/Grate (Passes 445.96 cfs of 1,070.26 cfs potential flow) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 154 Pond 14P: 11-28-2014 Asbuilts Hydrograph / ■Inflow Infl'oW'/1r ®Primary1 480- 445.96 cfs ' 460- ea=19.250 ac 440° 420= Inflow=268.11 cfs 400= 3807: P ri m a ry=445.96 cfs 360 320: 26 11 cfs Peak Elev-42,692.86' 300_ - 716='cf 280= Storage-209, 260' 3 240- a 220- 200 180= 160= 140.7-, i 1007 80 ' 0 20 r;= d � vr ¢ e 5m5}ttr ?+ av 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 14P: 11-28-2014 Asbuilts / Stage-Discharge D Primary` 2,600 2,500= 2,400 2,300= 2,200 2,100= ! ' 2,000= -- 1,900-ilii 4 1,800: cc 1,700= 'i- 1,600 d 1,500 Lu 1,400= 1,300= 1,200-" ' 1,100- 1,000- , 900 3 // 800 -'� 700 OrificelGrate 0 50 100 150 200 250 300 350 400 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type ll 24-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 155 Stage-Area-Storage for Pond 14P: 11-28-2014 Asbuilts Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.50 12,808 0 1,707.70 25,300 209,716 657.10 25,300 209,716 1,728.30 25,300 209,716 677.70 25,300 209,716 1,748.90 25,300 209,716 698.30 25,300 209,716 1,769.50 25,300 209,716 718.90 25,300 209,716 1,790.10 25,300 209,716 739.50 25,300 209,716 1,810.70 25,300 209,716 760.10 25,300 209,716 1,831.30 25,300 209,716 780.70 25,300 209,716 1,851.90 25,300 209,716 801.30 25,300 209,716 1,872.50 25,300 209,716 821.90 25,300 209,716 1,893.10 25,300 209,716 842.50 25,300 209,716 1,913.70 25,300 209,716 863.10 25,300 209,716 1,934.30 25,300 209,716 883.70 25,300 209,716 1,954.90 25,300 209,716 904.30 25,300 209,716 1,975.50 25,300 209,716 924.90 25,300 209,716 1,996.10 25,300 209,716 945.50 25,300 209,716 2,016.70 25,300 209,716 966.10 25,300 209,716 2,037.30 25,300 209,716 986.70 25,300 209,716 2,057.90 25,300 209,716 1,007.30 25,300 209,716 2,078.50 25,300 209,716 1,027.90 25,300 209,716 2,099.10 25,300 209,716 1,048.50 25,300 209,716 2,119.70 25,300 209,716 1,069.10 25,300 209,716 2,140.30 25,300 209,716 1,089.70 25,300 209,716 2,160.90 25,300 209,716 1,110.30 25,300 209,716 2,181.50 25,300 209,716 1,130.90 25,300 209,716 2,202.10 25,300 209,716 1,151.50 25,300 209,716 2,222.70 25,300 209,716 1,172.10 25,300 209,716 2,243.30 25,300 209,716 1,192.70 25,300 209,716 2,263.90 25,300 209,716 1,213.30 25,300 209,716 2,284.50 25,300 209,716 1,233.90 25,300 209,716 2,305.10 25,300 209,716 1,254.50 25,300 209,716 2,325.70 25,300 209,716 1,275.10 25,300 209,716 2,346.30 25,300 209,716 1,295.70 25,300 209,716 2,366.90 25,300 209,716 1,316.30 25,300 209,716 2,387.50 25,300 209,716 1,336.90 25,300 209,716 2,408.10 25,300 209,716 1,357.50 25,300 209,716 2,428.70 25,300 209,716 1,378.10 25,300 209,716 2,449.30 25,300 209,716 1,398.70 25,300 209,716 2,469.90 25,300 209,716 1,419.30 25,300 209,716 2,490.50 25,300 209,716 1,439.90 25,300 209,716 2,511.10 25,300 209,716 1,460.50 25,300 209,716 2,531.70 25,300 209,716 1,481.10 25,300 209,716 2,552.30 25,300 209,716 1,501.70 25,300 209,716 2,572.90 25,300 209,716 1,522.30 25,300 209,716 2,593.50 25,300 209,716 1,542.90 25,300 209,716 2,614.10 25,300 209,716 1,563.50 25,300 209,716 2,634.70 25,300 209,716 1,584.10 25,300 209,716 2,655.30 25,300 209,716 1,604.70 25,300 209,716 2,675.90 25,300 209,716 1,625.30 25,300 209,716 1,645.90 25,300 209,716 1,666.50 25,300 209,716 1,687.10 25,300 209,716 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 156 Summary for Pond 17P: 50 Buffer Wet Pond - 4*WQV Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 11.50" for 1000-yr event Inflow = 220.69 cfs @ 12.07 hrs, Volume= 14.660 af Outflow = 158.43 cfs © 12.17 hrs, Volume= 11.928 af, Atten= 28%, Lag= 6.5 min Primary = 133.86 cfs @ 12.17 hrs, Volume= 11.486 af Secondary = 24.58 cfs @ 12.17 hrs, Volume= 0.442 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs/2 Starting Elev= 645.00' Surf.Area= 14,148 sf Storage= 59,616 cf Peak Elev= 652.61' @ 12.17 hrs Surf.Area= 37,960 sf Storage= 266,989 cf (207,373 cf above start) Flood Elev= 652.75' Surf.Area= 38,322 sf Storage= 272,428 cf (212,813 cf above start) Plug-Flow detention time= 124.6 min calculated for 10.550 af(72% of inflow) Center-of-Mass det. time= 44.6 min ( 792.8 - 748.2 ) Volume Invert Avail.Storage Storage Description #1 636.00' 282,088 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 636.00 2,115 0 0 638.00 3,986 6,101 6,101 640.00 5,861 9,847 15,948 642.00 7,877 13,738 29,686 643.00 8,913 8,395 38,081 644.00 10,004 9,459 47,540 645.00 14,148 12,076 59,616 646.00 20,082 17,115 76,731 648.00 25,067 45,149 121,880 650.00 30,518 55,585 177,465 652.00 36,418 66,936 244,401 653.00 38,957 37,688 282,088 Device Routing Invert Outlet Devices #1 Primary 635.64' 36.0" Round Culvert L= 92.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/ Outlet Invert= 635.64' /635.18' S= 0.0050 'I Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 7.07 sf #2 Device 1 645.00' 3.0" Vert. Orifice/Grate X 2.00 columns X 3 rows with 12.0" cc spacing C= 0.600 #3 Device 1 650.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Secondary 651.50' 8.0' long x 18.0' breadth Broad-Crested Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 157 Primary OutFlow Max=133.75 cfs @ 12.17 hrs HW=652.58' (Free Discharge) t— =Culvert (Inlet Controls 133.75 cfs @ 18.92 fps) 2=Orifice/Grate (Passes < 3.60 cfs potential flow) 3=Orifice/Grate (Passes < 151.92 cfs potential flow) econdary OutFlow Max=23.72 cfs @ 12.17 hrs HW=652.58' (Free Discharge) =Broad-Crested Weir (Weir Controls 23.72 cfs @ 2.74 fps) Pond 17P: 50 Buffer Wet Pond - 4*WQV Hydrograph 220.69 cfs ■Inflow El Outflow lnfl'ow',Area=15.300 ac Primary 2407 ■Secondary 2207 InfloW=220.69 cfs 200=' 158.43 cfs 180= Outflow=158.43 cfs I Primary=133.86 cfs 160 ry=' _ 133.86 cfs v Se COnda, 24.58 cfs 140- Peak Elev=652.61' Ic 1207 LL 100= Storage=266,989 cf' 80. a KA I - - - 6010- � � 24. ao 58 cfs ° s , r� � 1. , ' 1.// 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 158 Pond 17P: 50 Buffer Wet Pond - 4*WQV Stage-Discharge � alir , � re-Ov ®Primary A F.x 653 ! Secondary ,,fir : r s,�s. . 652 Crested Weir r. ' . Orifice/Grate 651 ! 650 649 648 %' 647 w 646 -r,;, Orifice/Grate at 645 o 644 v a 643 w 642 % ' 641 0 640 F 639 638 dt r-.r 637 0 20 40 60 80 100 120 140 160 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type ll 24-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 159 Stage-Area-Storage for Pond 17P: 50 Buffer Wet Pond - 4*WQV Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 636.00 2,115 0 646.40 21,079 84,963 636.20 2,302 442 646.60 21,578 89,228 636.40 2,489 921 646.80 22,076 93,594 636.60 2,676 1,437 647.00 22,575 98,059 636.80 2,863 1,991 647.20 23,073 102,624 637.00 3,051 2,583 647.40 23,571 107,288 637.20 3,238 3,212 647.60 24,070 112,052 637.40 3,425 3,878 647.80 24,568 116,916 637.60 3,612 4,581 648.00 25,067 121,880 637.80 3,799 5,323 648.20 25,612 126,947 638.00 3,986 6,101 648.40 26,157 132,124 638.20 4,174 6,917 648.60 26,702 137,410 638.40 4,361 7,770 648.80 27,247 142,805 638.60 4,549 8,661 649.00 27,793 148,309 638.80 4,736 9,590 649.20 28,338 153,922 639.00 4,924 10,556 649.40 28,883 159,644 639.20 5,111 11,559 649.60 29,428 165,475 639.40 5,298 12,600 649.80 29,973 171,415 639.60 5,486 13,679 650.00 30,518 177,465 639.80 5,673 14,795 650.20 31,108 183,627 640.00 5,861 15,948 650.40 31,698 189,908 640.20 6,063 17,140 650.60 32,288 196,306 640.40 6,264 18,373 650.80 32,878 202,823 640.60 6,466 19,646 651.00 33,468 209,458 640.80 6,667 20,959 651.20 34,058 216,210 641.00 6,869 22,313 651.40 34,648 223,081 641.20 7,071 23,707 651.60 35,238 230,069 641.40 7,272 25,141 651.80 35,828 237,176 641.60 7,474 26,616 652.00 36,418 244,401 641.80 7,675 28,131 652.20 36,926 251,735 642.00 7,877 29,686 652.40 37,434 259,171 642.20 8,084 31,282 652.60 37,941 266,708 642.40 8,291 32,920 652.80 38,449 274,347 642.60 8,499 34,599 653.00 38,957 282,088 642.80 8,706 36,319 643.00 8,913 38,081 643.20 9,131 39,885 643.40 9,349 41,733 643.60 9,568 43,625 643.80 9,786 45,561 644.00 10,004 47,540 644.20 10,833 49,623 644.40 11,662 51,873 644.60 12,490 54,288 644.80 13,319 56,869 645.00 14,148 59,616 645.20 15,335 62,564 645.40 16,522 65,749 645.60 17,708 69,172 645.80 18,895 72,833 646.00 20,082 76,731 646.20 20,581 80,797 a WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 160 Summary for Pond 19P: Forebay Inflow Area = 15.300 ac, 65.00% Impervious, Inflow Depth > 11.47" for 1000-yr event Inflow = 220.59 cfs @ 12.07 hrs, Volume= 14.630 af Outflow = 220.69 cfs @ 12.07 hrs, Volume= 14.660 af, Atten= 0%, Lag= 0.0 min Primary = 220.69 cfs @ 12.07 hrs, Volume= 14.660 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Starting Elev= 645.00' Surf.Area= 3,684 sf Storage= 14,062 cf Peak Elev= 725.48' @ 12.07 hrs Surf.Area= 3,684 sf Storage= 14,062 cf Plug-Flow detention time= 16.8 min calculated for 14.338 af(98% of inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow) Volume Invert Avail.Storage Storage Description #1 638.00' 14,062 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 638.00 608 0 0 640.00 1,290 1,898 1,898 642.00 2,157 3,447 5,345 644.00 3,145 5,302 10,647 645.00 3,684 3,415 14,062 Device Routing Invert Outlet Devices #1 Primary 644.75' 20.0' long x 0.25' rise Sharp-Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=217.13 cfs @ 12.07 hrs HW=723.02' (Free Discharge) t-1=Sharp-Crested Vee/Trap Weir(Orifice Controls 217.13 cfs @ 43.43 fps) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD® 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 161 Pond 19P: Forebay Hydrograph 240./1 1 •l 77(1 RA rf ■Inflow ®Primary 230= 220.69 cfs Inflow'�Are a=15.300_ac 220- 210= 200In - flow=220.59 cfs 190- 180= Primary=220.69 cfs 170= Iso= � � � � � , Iso= Peak Elev=725.48' 130 Stprage=14,062 'cf 3 110 100 90' 80= 70 60- 50= 40-' 30--;„ 1 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 19P: Forebay Stage-Discharge 720= ®Primary` 715E 710= 705-E r r 700 695-i y 690 v 685=" c 680 ami 675= - w 670= 665 660 650=. i% 645" Sharp-Crested:Vee/Trap"Weir 640_ / 0 20 40 60 80 100 120 140 160 180 200 Discharge (cfs) WPO Pond - Old Trail - Block 12, 15, 11 & 14 OT Block 14 Final Wet Pond Type 1124-hr 1000-yr Rainfall=14.21" Prepared by Hewlett-Packard Company Printed 11/12/2015 HydroCAD© 10.00 s/n 08126 ©2013 HydroCAD Software Solutions LLC Page 162 Stage-Area-Storage for Pond 19P: Forebay Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 638.00 608 0 684.80 3,684 14,062 638.90 915 685 685.70 3,684 14,062 639.80 1,222 1,647 686.60 3,684 14,062 640.70 1,593 2,907 687.50 3,684 14,062 641.60 1,984 4,517 688.40 3,684 14,062 642.50 2,404 6,485 689.30 3,684 14,062 643.40 2,849 8,849 690.20 3,684 14,062 644.30 3,307 11,615 691.10 3,684 14,062 645.20 3,684 14,062 692.00 3,684 14,062 646.10 3,684 14,062 692.90 3,684 14,062 647.00 3,684 14,062 693.80 3,684 14,062 647.90 3,684 14,062 694.70 3,684 14,062 648.80 3,684 14,062 695.60 3,684 14,062 649.70 3,684 14,062 696.50 3,684 14,062 650.60 3,684 14,062 697.40 3,684 14,062 651.50 3,684 14,062 698.30 3,684 14,062 652.40 3,684 14,062 699.20 3,684 14,062 653.30 3,684 14,062 700.10 3,684 14,062 654.20 3,684 14,062 701.00 3,684 14,062 655.10 3,684 14,062 701.90 3,684 14,062 656.00 3,684 14,062 702.80 3,684 14,062 656.90 3,684 14,062 703.70 3,684 14,062 657.80 3,684 14,062 704.60 3,684 14,062 658.70 3,684 14,062 705.50 3,684 14,062 659.60 3,684 14,062 706.40 3,684 14,062 660.50 3,684 14,062 707.30 3,684 14,062 661.40 3,684 14,062 708.20 3,684 14,062 662.30 3,684 14,062 709.10 3,684 14,062 663.20 3,684 14,062 710.00 3,684 14,062 664.10 3,684 14,062 710.90 3,684 14,062 665.00 3,684 14,062 711.80 3,684 14,062 665.90 3,684 14,062 712.70 3,684 14,062 666.80 3,684 14,062 713.60 3,684 14,062 667.70 3,684 14,062 714.50 3,684 14,062 668.60 3,684 14,062 715.40 3,684 14,062 669.50 3,684 14,062 716.30 3,684 14,062 670.40 3,684 14,062 717.20 3,684 14,062 671.30 3,684 14,062 718.10 3,684 14,062 672.20 3,684 14,062 719.00 3,684 14,062 673.10 3,684 14,062 719.90 3,684 14,062 674.00 3,684 14,062 720.80 3,684 14,062 674.90 3,684 14,062 721.70 3,684 14,062 675.80 3,684 14,062 722.60 3,684 14,062 676.70 3,684 14,062 723.50 3,684 14,062 677.60 3,684 14,062 724.40 3,684 14,062 678.50 3,684 14,062 679.40 3,684 14,062 680.30 3,684 14,062 681.20 3,684 14,062 682.10 3,684 14,062 683.00 3,684 14,062 683.90 3,684 14,062