The URL can be used to link to this page

Storm Water Narrative 09-15-2013CIN OF CHANHASSEN RECEIVED SEP 16 2013 CHANHASSEN PLANNING DEPT EVS, Inc. Powers Place Chanhassen, MN STORM WATER NARRATIVE 9/15/13 EVS 110250 Valley View Rd., Suite 123 Eden Prairie, MN 55344 -3534 Phone: 952.646.0236 Fax: 952.646.0290 www.evs- eng.com United Properties Powers Place 9/15/13 TABLE OF CONTENTS EXISTING SITE CONDITIONS 3 PROPOSED DEVELOPMENT 3 JURISDICTIONAL BODIES AND REQUIREMENTS 3 EXISTING SITE DRAINAGE PATTERNS 4 PROPOSED ON -SITE STORM WATER MANAGEMENT 4 CALCULATIONS 4 CONCLUSION 5 APPENDIX A— EXISTING DRAINAGE EXHIBIT APPENDIX B — EXISTING HYDROCAD APPENDIX C — PROPOSED DRAINAGE EXHIBIT APPENDIX D— PROPOSED HYDROCAD APPENDIX E — WATER QUALITY CALCS (P8) APPENDIX F —STORM PIPE SIZING Storm Water Narrative Page 12 EVS 1 10250 Valley View Rd., Suite 123 1 Eden Prairie, MN 55344 -3534 1 Phone: 952.646.0236 1 Fax: 952.646.0290 1 www,evs- enq.com United Properties Powers Place 9/15/13 EXISTING SITE CONDITIONS The site comprises 16.9 acres of woodland and agricultural row crops. Due to steep slopes within areas of thick woods and a shoreland setback only 11.2 acres will be graded and disturbed with this project. The four geotechnical borings performed by Braun within the construction limits of the project to depths of 12 to 25 feet did not encounter groundwater. The soils most commonly encountered consisted of organic clay topsoil overlying glacially deposited clayey sand, sandy lean clay and lean clay. PROPOSED DEVELOPMENT The Powers Place industrial office building consists of approximately 140,800 SF of internal space. On the exterior loading docks will handle material /product deliveries on the north side of the building. Parking stalls totaling 229 will be provided on the east, south, and west sides of the building. Retaining walls will be used on -site to tie into existing grades minimizing disturbed area due to steep grades. A watermain extension will come from the east in Powers Blvd. and the sanitary sewer extension will come up from a trunk main along Riley Creek to the west. Earthwork for the project results in a net export of 85,000 CY. This material will be relocated to a project in the City of Shakopee. Permitting for that work is being done by the developer. JURISDICTIONAL BODIES AND REQUIREMENTS The City of Chanhassen is the LGU for this site. Appendix D 'Development Standards' of the City's Surface Water Management Plan outlines the requirements for this project. The following criteria must be met: • No increase in peak discharge may result from the proposed project for the 2 -year, 10- year, or 100 -year storm events. • Water quality features meeting the MPCA NPDES construction permit for Permanent Storm Water Management Systems (irrigation from retention structure meets this criteria) • Water quality treatment consistent with NURP (90% removal of TSS, 60% removal of TP) The design storms are from page D -2 of the Surface Water Management Plan and go as follows: Rainfall Frequency Rainfall (inches) 2 -Year, 24- Hour 2.8 10 -Year, 24 -Hour 4.2 100 -Year, 24 -Hour 6.0 Storm Water Narrative Page 13 EVS 1 10250 Valley View Rd., Suite 123 1 Eden Prairie, MN 55344 -3534 1 Phone: 952.646.0236 1 Fax: 952.646.0290 1 www.evs- enq.com United Properties Powers Place 9/15/13 The NRCS methodology of HydroCAD was used to provide stormwater modeling for this site and P8 Urban Catchment modeled water quality. EXISTING SITE DRAINAGE PATTERNS Currently the site drains to Riley Creek to the southwest and Powers Blvd. on the southeast. Sediment runoff from the site onto Powers Blvd. has been an issue for City maintenance staff and is anticipated to be improved with the development between the change in land cover use and permanent stormwater management practices. No existing BMPs are in use. PROPOSED ON -SITE STORM WATER MANAGEMENT Assumptions considered: No groundwater concerns Infiltration rates for native soils are 0.2 in /hr according to MPCA 2005 Minnesota Stormwater Manual. Design constraints include: Significant grade change from FFE to Riley Creek (946.0 - 900.0); dissipating energy Limiting disturbance of trees and their valuable root system The entire parking and loading /deliveries areas will have traditional catch basin and storm sewer piping collecting runoff. These areas will flow to underground precast concrete vaults where the NURP volume will be held below the outlet invert. Two separate underground vaults will regulate live storage for the north and south halves of the site. Drive aisles into the site both on the northeast and southeast sides will not be able to flow to the underground vaults due to grades on -site. This area of runoff will flow to catch basins with sumps and discharged to the Powers Blvd. ditch with energy dissipated from it to avoid erosion at the outlet. Culverts will be installed under both drive aisles at the entrance of the site to keep Powers Blvd. ditch flow concentrated and following existing drainage patterns. CALCULATIONS The 'Reaches' (E1R & P1R) used in the HydroCAD model are used to combine runoff that discharges from a site in multiple directions. By combining these with a Reach the hydrographs of the areas are overlapped /merged with consideration to when each areas peak discharge may occur. Summing the peak discharge rate of each drainage area together would not be accurate for the entire sites peak discharge rate since they occur at different times. Storm Water Narrative Page 14 EVS 1 10250 Valley View Rd., Suite 123 1 Eden Prairie, MN 55344 -3534 1 Phone: 952.646.0236 1 Fax: 952.646.0290 1 www.evs- enq.com United Properties Powers Place Discharge Rate Control The existing site HydroCAD model produces the following results. Rainfall Frequency Discharge Rate (cfs) (E1R) Runoff Volume (af) (E1R) 2 -Year, 24 -Hour 8.81 1.181 10 -Year, 24 -Hour 20.53 2.565 100 -Year, 24 -Hour 37.64 4.618 A comparison of the existing discharge rates and proposed rates are as follows. 9/15/13 Rainfall Frequency Existing (cfs) (E1R) Proposed (cfs) (P1R) 2 -Year, 24 -Hour 8.81 8.57 10 -Year, 24 -Hour 20.53 20.35 100 -Year, 24 -Hour 37.64 36.19 The discharge rate for each of the required rainfall events is reduced from existing conditions. Water Quality The percent impervious area increases from 0% to 47.5% from existing to proposed. This results in 7.4 acres of impervious area being captured and directed to the underground stormwater vaults. The water quality volume set forth on page 28 of the current MPCA NDPES General Permit shall be one (1) inch of the runoff from the new impervious surfaces created for this project. This results in a minimum volume of 14,836 CF for the north drainage area and 11,987 CF for the south drainage area. Included in Appendix D with the HydroCAD report are storage tables identifying the elevations where these volumes are retained. For both vaults the volume is proven within 2', however the outlets for both vaults is at 3' depth which means additional dead storage is provided. In addition to this volume, irrigation will pull water from the underground vaults which further prevents the discharge of phosphorus from the site. Appendix E includes a P8 model that shows the required pollutant removals occurring in the underground stormwater vaults. CONCLUSION All rate control, water quality and NURP requirements are met in full. Soil erosion and sediment control BMPs are shown in the full civil package and will be installed so as to prevent the discharge of sediment throughout the duration of construction. A SWPPP in accordance with NPDES and MPCA requirements has been generated for this project and will be held on site during construction with weekly inspections being performed by the General Contractor. Please direct any questions regarding the design to Brian Johnson of EVS at 952- 646 -0275 or b4ohnson@evs-eng.com. Storm Water Narrative Page 15 EVS 1 10250 Valley View Rd., Suite 123 1 Eden Prairie, MN 55344 -3534 1 Phone: 952.646.0236 1 Fax: 952.646.0290 1 www.evs- enq.com United Properties Powers Place APPENDIX A EXISTING DRAINAGE EXHIBIT Storm Water Narrative 9/15/13 Page 16 EVS 110250 Valley View Rd., Suite 123 1 Eden Prairie, MN 55344 -3534 1 Phone: 952.646.0236 1 Fax: 952.646.0290 I www.evs- enq.com I 1 Ir111r19GJV I M i / SUBCATCHMENTS E1S E2S Powers Place Chanhassen, MN DESCRIPTION AREA CN WOODS, HSG C 4.78 AC 70 ROW CROPS, HSG C 1.20 AC 82 WOODS, HSG C 4.38 AC 70 ROW CROPS, HSG C 6.58 AC 82 NOTE 1. REACH E1 R COMBINES THE HYDROGRAPH OF EACH POND OR SUBCATCHMENT DISCHARGING OFF -SITE TO PROVIDE AN OVERALL PEAK DISCHARGE TIME AND RATE. PAGE No N 0 s0 im SCALE IN FEET EUS Existing Drainage Exhibit 9.15.13 r 1 i i r United Properties Powers Place 9/15/13 APPENDIX B EXISTING HYDROCAD Storm Water Narrative Page 17 EVS 1 10250 Valley View Rd., Suite 123 1 Eden Prairie, MN 55344 -3534 1 Phone: 952.646.0236 1 Fax: 952.646.0290 1 www.evs- enq.com E 1 S E2S West East E1R Subcat Reach on k Routing Diagram for UP - Chan HydroCAD l,. Prepared by EVS, Inc., Printed 9/1212013 FHyd,.CAD(E) 10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC UP - Chan HydroCAD Type 11 24 -hr 2 -Yr, 24- Hr Rainfall= 2.80" Prepared by EVS, Inc. Printed 9/12/2013 HydroCAD® 10.00 s/n 01636 02011 HydroCAD Software Solutions LLC Page 2 Time span =0.00 -24.00 hrs, dt =0.05 hrs, 481 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method SubcatchmentE1S: West RunoffArea= 260,341 sf 0.00% Impervious Runoff Depth >0.68" Flow Length =300' Slope= 0.1000 '/' Tc =50.6 min CN =72 Runoff =2.10 cfs 0.338 of SubcatchmentE2S: East Runoff Area = 477,526 sf 0.00% Impervious Runoff Depth >0.92" Flow Length =300' Slope= 0.2000'/' Tc =38.3 min CN =77 Runoff =7.01 cfs 0.843 of Reach E1 R: Inflow =8.81 cfs 1.181 of Outflow =8.81 cfs 1.181 of Total Runoff Area= 16.939 ac Runoff Volume= 1.181 of Average Runoff Depth= 0.84" 100.00% Pervious= 16.939 ac 0.00% Impervious= 0.000 ac UP - Chan HydroCAD Prepared by EVS, Inc. Type 1124 -hr 2 -Yr, 24 -Hr Rainfall= 2.80" Printed 9/12/2013 Software Summary for Subcatchment E1S: West Runoff = 2.10 cfs @ 12.56 hrs, Volume= 0.338 af, Depth> 0.68" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 2 -Yr, 24 -Hr Rainfall= 2.80" Area (sf) CN Description 208,273 70 Woods, Good, HSG C 52,068 82 Row crops contoured Good HSG C 260,341 72 Weighted Average 260,341 100.00% Pervious Area Tc Length Slope min) (feet) (ft/ft) 50.6 300 0.1000 Description 0.10 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" Subcatchment E1S: West C Type Yr e -ll -- 27 24 -Hr Rainfall =2.$0" Run, off Area= 260'y341 $f j „ Runoff Voltlma=0.338 of j Ruhoff_Deptha0.68 LL 1 FloW Length =300' j Slo0e= 0.1000 'J' Tc =50.6 rain CN72 Time (hours) � � �� ■ Runoff ------- - - - - -- I I I I I I I I I 21 UP - Chan HydroCAD Prepared by EVS, Inc. Type 1124 -hr 2 -Yr, 24 -Hr Rainfall= 2.80" © 2011 HydroCAD Software Summary for Subcatchment E2S: East Runoff = 7.01 cfs @ 12.37 hrs, Volume= 0.843 af, Depth> 0.92" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 2 -Yr, 24 -Hr Rainfall= 2.80" Printed 9/12/2013 Area (sf) CN Description 191,010 70 Woods, Good, HSG C 286,516 82 Row crops, contoured, Good, HSG C 477,526 77 Weighted Average 477,526 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 38.3 300 0.2000 0.13 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" N O LL Subcatchment E2S: East I I I I I I I I Type 7 Type 1124 -hX III 2-Yr 24 -Hr Rainfall--2.80", I I I Runoff Area=477�626 sf Runoff VOlum6 =0.843 of Depthal Runoff ' 0.92" I Flow Length -300' -- - Slope4.2000 'J' I I I I -Tc =38.3 min - -Ii I I I I CN =77 i I I I I I I I I I I I I I Time (hours) I I I I I I I 1 I I I � I I I I I 1 I I I . Run Off I I I I I I I I I I -I -I -Y I I I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I I I I I I I I I I 1 I I I I I I I i 1 1 1 I I I I I I I I I I I I I 1 -T -T -r -I 1 1 i I 1 I I i I I 1 1 I I I I _ I I 1 1 I 1 1 I I I I 1 1 i 1 1 I I I I 1 1 1 1 I I 1 I 1 1 1 I I I 1 1 I 1 I I I I I I I I I I I UP - Chan HydroCAD Prepared by EVS, Inc. HvrimCAD® 10.00 s/n 01636 02011 Type 1124 -hr 2 -Yr, 24 -Hr Rainfall= 2.80" Printed 9/12/2013 Summary for Reach E1 R: Inflow Area = 16.939 ac, 0.00% Impervious, Inflow Depth > 0.84" for 2 -Yr, 24 -Hr event Inflow = 8.81 cfs @ 12.41 hrs, Volume= 1.181 of Outflow = 8.81 cfs @ 12.41 hrs, Volume= 1.181 af, Atten= 0 %, Lag= 0.0 min Routing by Stor- Ind +Trans method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Reach E1 R: I I 1 1 1 I I I I I I 1 I I I I I I I ® Inflow OOutflow cfsI I I I I 1 1 I I 1 1 I I I I I I I I I I 1 I 1 I I 1 1 1 i 1 1 1 1 I I 1 I 1 I I 1 1 1 I I I I 1 1 1 I 1 1 1 1 I 1 1 I 1 I _L I I 1 I I I I I I I I I I I I I I I I I I I 1 I I I I 1 I I 1 I I I I I I I I i I I I I I I I I I I I I 1 1 1 1 1 1 1 I I I 1 I I I I I I 1 I I 1 I I I I I I I I I I I I I I 1 1 1 I I 1 I 1 1 1 I 1 I 1 I 1 I I I I 1 I 1 I I I II I 1 1 1 I I I 1 1 I I I I I t I I 1 I I I I I I I I I I I Time (hours) 1 I I I I I 1 I I I 1 1 I I I 1 1 I 1 1 I I 1 1 1 1 1 8 / ' I I 1 1 I 1 1 I 1 1 1 1 1 I 1 1 I I I 1 _ 1 I T 1 1 I I 1 1 I 1 1 1 1 1 1 1 J__L__L_J__J__ I I I I I I I I 1 I s / I I I I I I I I I I M YYi ' I 1 1 I I I I I I I 5' 1 1 1 1 1 1 1 1 I I I I I I I I I I LL / 4 I I I I I I I I I I I I I I I I 1 I I 3 / / I 1 1 I 1 1 1 1 I 1 I I 1 1 1 I 1 I 2 I I I I I I I I 1 I i I 1 1 I I I I I 1 1 1 I I I I I I 1 I I I I I I I ® Inflow OOutflow cfsI I I I I 1 1 I I 1 1 I I I I I I I I I I 1 I 1 I I 1 1 1 i 1 1 1 1 I I 1 I 1 I I 1 1 1 I I I I 1 1 1 I 1 1 1 1 I 1 1 I 1 I _L I I 1 I I I I I I I I I I I I I I I I I I I 1 I I I I 1 I I 1 I I I I I I I I i I I I I I I I I I I I I 1 1 1 1 1 1 1 I I I 1 I I I I I I 1 I I 1 I I I I I I I I I I I I I I 1 1 1 I I 1 I 1 1 1 I 1 I 1 I 1 I I I I 1 I 1 I I I II I 1 1 1 I I I 1 1 I I I I I t I I 1 I I I I I I I I I I I Time (hours) UP - Chan HydroCAD Prepared by EVS, Inc. © 2011 Type 1124 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Printed 9112/2013 Time span =0.00 -24.00 hrs, dt =0.05 hrs, 481 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment El S: West Runoff Area= 260,341 sf 0.00% Impervious Runoff Depth >1.58" Flow Length =300' Slope= 0.1000'f Tc =50.6 min CN =72 Runoff =5.51 cfs 0.785 of SubcatchmentE2S: East Runoff Area = 477,526 sf 0.00% Impervious Runoff Depth >1.95" Flow Length =300' Slope= 0.2000'r Tc =38.3 min CN =77 Runoff =15.63 cfs 1.780 of Reach E1 R: Inflow =20.53 cfs 2.565 of Outflow =20.53 cfs 2.565 of Total Runoff Area= 16.939 ac Runoff Volume = 2.565 of Average Runoff Depth =1.82" 100.00% Pervious = 16.939 ac 0.00% Impervious = 0.000 ac UP - Chan HydroCAD Type 11 24 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Prepared by EVS, Inc. Printed 9/12/2013 HydroCAD ®10 00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Pape 7 Summary for Subcatchment EIS: West Runoff = 5.51 cfs @ 12.53 hrs, Volume= 0.785 af, Depth> 1.58" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Area (sf) CN Description 208,273 70 Woods, Good, HSG C 52,068 82 Row crops contoured Good HSG C 260,341 72 Weighted Average 260,341 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft1ft) (ft/sec) (cfs) 50.6 300 0.1000 0.10 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" Subcatchment E1S: West Hydrograph 1__r_ ■Runoff 6- 5.51 cfs Type If 24 -hr I I 1 1 1'0 -Yr s - off Area 260 0 - - -' 2'4 -Hr Ra_ infall -4. _ 4 Run ;341 of I Runoff, Volum6 =0.785 of N I I I I I I 1 I I 1 I 0 3 -Runoff Ue th >r1 68" - LL FIloW Length =300' J 2 Tc =5046 rhin - 1 Eid =72- ' -------- - , � Time (hours) UP - Chan HydroCAD Type 11 24 -hr 10 -Yr, 24- Hr Rainfall= 4.20" Prepared by EVS, Inc. Printed 9/12/2013 HydroCAD@ 10.00 s/n 01636 02011 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment E2S: East Runoff = 15.63 cfs @ 12.36 hrs, Volume= 1.780 af, Depth> 1.95' Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 10 -Yr, 24 -Hr Rainfall= 4.20'1 Area (sf) CN Description 191,010 70 Woods, Good, HSG C 286,516 82 Row crops, contoured Good HSG C 477,526 77 Weighted Average 477,526 100.00% Pervious Area Tc Length Slope min) (feet) (ft/ft) 38.3 300 0.2000 Capacity Description 0.13 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" Subcatchment E2S: East Hydrograph 1 o Rar lds LL__I__J__J__.__1__L__L__ I I I I I I I I I I - - - - - -- - -- -- - - - - - I : I - -I - -I - I I I I - -T - - - - - I I I I I I I I I I I I _L _L__ I I 1 I I I I I I I I 1 r__r__r__r__r__� 1 I 1 I I I 1 I 1 I I I I I I I I I I 1 I I 1 I I I I 1 I 1 I I I I I I 1 1 I 1 I I � it 12 1J 14 1b 16 17 18 19 20 Time (hours) 17 ; -- - 16 15.1 II124 =h1� 15 Type- I 14 10-Yr , r 1 I I 13 - 21;4 -Mr Ra % nfall= 4.20' I- 12 11 Runoff Arree =4771 `526 sf - -' -_ 1 -_ I I I „ 10 Runoff Volume =1.780 Of 9 - Runoff-Depth >411IV - -�r- , - 0 LL - Flo Uv Len' =300' 7 ith LL__1__J_- - s Slo Oe- '0.2000.1_- 5 �- Tc =38,3 mm.......... 4 1 I 1 3 � — 1 I 1 1 I 1 1 I 1 _L 2 1 o Rar lds LL__I__J__J__.__1__L__L__ I I I I I I I I I I - - - - - -- - -- -- - - - - - I : I - -I - -I - I I I I - -T - - - - - I I I I I I I I I I I I _L _L__ I I 1 I I I I I I I I 1 r__r__r__r__r__� 1 I 1 I I I 1 I 1 I I I I I I I I I I 1 I I 1 I I I I 1 I 1 I I I I I I 1 1 I 1 I I � it 12 1J 14 1b 16 17 18 19 20 Time (hours) UP - Chan HydroCAD Prepared by EVS, Inc. Hveimr.Amb 10 00 s/n 01636 Type 1124 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Printed 9/12/2013 Summary for Reach E1 R: Inflow Area = 16.939 ac, 0.00% Impervious, Inflow Depth > 1.82" for 10 -Yr, 24 -Hr event Inflow = 20.53 cfs @ 12.39 hrs, Volume= 2.565 of Outflow = 20.53 cfs @ 12.39 hrs, Volume= 2.565 af, Atten= 0 %, Lag= 0.0 min Routing by Stor- Ind +Trans method, Time Span= 0.00 -24.00 hrs, dI 0.05 hrs Reach E1 R: Hydrograph - Time (hours) --- J-- J-- L- ----- - —.L -. I I I I I I 22;. 1 1 .I� 20.53 Li z, III640IAf ►F$1= 5,,� 20 Y _- _r -r "I 19 1 I I I I I I I I 1 I I I I I I I I I I I 1 L__I__ I__ l__ L__I___I__J__L__ L__L._ I 17 r__r 16` , -_ I__J__ 1__L_J___I__J 1 I I I I I I I I I 15 i ,' 14 , I r I 1__ 1__ L_J_ 1 y, 19 V . .12 I I I I I ZL: 10 .' ,' 8 -I ,' 6 I-- I-- �- -I - - -I -- S I I I I I q - -7 -T- r _1 _y -r -r _1 3, I__J__1__! �_ Time (hours) ®Inflow --- I-- f-- - - -r - -I oollmow - -i --- -- ;-=-- F - L -I _J_ J _L__L _I _J _1 _L _I__ Y _- _r -r "I 1 I I I I I I I I 1 I I I I I I I I I I 1 L__I__ I__ l__ L__I___I__J__L__ L__L._ I I I 1 I I I 1 I I I 1 1 I 1 I I 1 I I I I I I I 1 I I 1 I 1 I 1 1 I r I 1__ 1__ L_J_ 1 I 1 I 1 I - - - - -- I I I I I I I I I UP - Chan HydroCAD Type 11 24 -hr 100 -Yr, 24- Hr Rainfall= 6.00" Prepared by EVS, Inc. Printed 9/12/2013 HydroCAD ®10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Page 10 Time span =0.00 -24.00 hrs, dt =0.05 hrs, 481 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method SubcatchmentElS: West RunoffArea= 260,341 sf 0.00% Impervious Runoff Depth >2.95" Flow Length =300' Slope= 0.1000'/' Tc =50.6 min CN =72 Runoff =10.68 cfs 1.470 of Suboatchment E2S: East Runoff Area = 477,526 sf 0.00% Impervious Runoff Depth >3.45" Flow Length =300' Slope= 0.2000 'r Tc =38.3 min CN =77 Runoff =28.02 cfs 3.148 of Reach E1 R: Inflow =37.64 cfs 4.618 of Outflow =37.64 cfs 4.618 of Total Runoff Area= 16.939 ac Runoff Volume = 4.618 of Average Runoff Depth =3.27" 100.00% Pervious = 16.939 ac 0.00% Impervious = 0.000 ac UP - Chan HydroCAD Type 11 24 -hr 100 -Yr, 24- Hr Rainfall= 6.00" Prepared by EVS, Inc. Printed 9112/2013 HydroCAD ®10 00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment EIS: West Runoff = 10.68 cfs @ 12.51 hrs, Volume= 1.470 af, Depth> 2.95" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Area (sf) CN Description 208,273 70 Woods, Good, HSG C 52,068 82 Row crops contoured Good HSG C 260,341 72 Weighted Average 260,341 100.00% Pervious Area Tc .'M- v 0 LL Length Slope (feet) (ft1ft) 300 0.1000 Capacity Description 0.10 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" Subcatchment EIIS: West Hydrograph I I I -10Q -4rl l 11 l' I_ r+ I I Runoff Area =260 341_if_ Runoff Vb1im6=1.470 of Runoff Dapth:�2.95r" Flo* Length =300' Slo�eT0.10b0- `J' -'ll II I - -,- �c= 6076- rhiri - -; - ; - -� - ; - - -; -- ,- 1 I 1 I 1 1 I I _� =}2 T`ii I I 1 I I 1 I I I I 1 I I I I I I __1 I I I I I I I I I 1 1 I I 1 i I I I 1 1 I 1 I I 6 7 I I I I I I I I 1 1 I 1 I 1 1 I I I I 1 � RunotF cfs1 I I I I I I I I 1 I I 1 1 I 1 I I 1 I I I I I I I I I I I I I 1 I I I I 1 II I I I I I I I I I I I I I I 1 I I I I I I 1 1 I I I 1 I I I I I I 1 I I II I 1 I 1 I I I I 1 -- 1-- Y-- L-- I--- I--- �-- 1-- 1-- Y - -4 -- I 1 I I I 1 I I I 1 1 I I I I 1 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 I I I I I 1 1 I I 1 I I I I _J _ _J _1 _ L-' _ L_ I 1 I I I I I I _ I 1 I 1 I I I I I I I I I I I Time (hours) UP - Chan HydroCAD Type 11 24 -hr 100 -Yr, 24- Hr Rainfall= 6.00" Prepared by EVS, Inc. Printed 9/12/2013 HydroCAD® 10.00 s/n 01636 @2011 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment E2S: East Runoff = 28.02 cfs @ 12.34 hrs, Volume= 3.148 af, Depth> 3.45" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Area (sf) CN Description 191,010 70 Woods, Good, HSG C 286,516 82 Row crops, contoured, Good HSG C 477,526 77 Weighted Average 477,526 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 38.3 300 0.2000 0.13 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" N V 0 LL Subcatchment E2S: East I I I I I I I I I_ 28 �T,ype_11 24ahr__L__L__L__I --- /�ii /� I I I I I I -1 v—Yr Y r , I I 2114 -Hr Rainfa11 =6.00" I I Runoff Are6=477526 1 sf- T I I Runoff Volume =1148 of Runoff Deptha3.45 ---------- J I I I I FloW Length =3001' Slope= 0.2000 Y` - ; - - IIL - -II - Tc -38. '3 rhin - -r - -; - -r - T - -II -- CN =771 ; 1 I I I I I 1 1 1 1 ' O Runoff .02cfs _,__Y__1__1__,__ 1 1 I _ L _. I I I I I I I I I 1 I 1 1 ----------- I I I I I I 1 I I I I I I I I I I I I I I I I I I I I I I 1 1 1 I I 1 I I I 1 I 1 1 1 1 1 1 1 - Y- Y - -r - -r I --I - -� - r - - r -r -- _ L I 1 I I I _I _I _l _l _T _r _r.. _L ..I _I _J _J _1 _L _L_. I I I I I I I 1 I I I I I I 1 I 1 1 I I 1 I I I 1 I I _. - `-- r-- r-- 1--- I-- T-- T- -r-- r - -r__ 1 I 1 1 1 I 1 I Time (hours) UP - Chan HydroCAD Type 1124 -hr 100 -Yr, 24- Hr Rainfa11= 6.00" Prepared by EVS, Inc. Printed 9/12/2013 HydroCAD® 10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Page 13 Summary for Reach E1 R: Inflow Area = 16.939 ac, 0.00% Impervious, Inflow Depth > 3.27" for 100 -Yr, 24 -Hr event Inflow = 37.64 cfs @ 12.38 hrs, Volume= 4.618 of Outflow = 37.64 cfs @ 12.38 hrs, Volume= 4.618 af, Atten= 0 %, Lag= 0.0 min Routing by Stor - Ind +Trans method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Reach E1 R: 42 i__L__I__J__1__L. ■Outflow ao -I �Q 37.64 cfs L-- I--- '-- �-- 1-- '--- '-- J-- 1-- L - -' -- 38 ,. __y__y__r_ --- _ --- _y__r__r__I__ I 36 r.. _I -- -r - -r ,-- ,-- r-- r-- r- r'T - -r__r _. 34 I I-- '__--- �_- !-- -� -' -- 32 30 �/ , _I _y _y _1' _I -I -4 - h_-F_ -I__ �_- I__- i_ -y__h __I___I__y _i --- _F _I 28 r__,__�__r__r 26 ' _______________________ _______ " 24 / I J1__L____I__I__L__L_J__ L_J__J_____1_J__J__J__L__L_J__ I I I I I I ... 22 1 3 20 1 __r__,___I__y__r__y__I__ 1 _I_ _ _y__y G ., __,__y__y 16 14 12 _, -I -♦ -y _, -I -y -r -r -I -I _Y -y -r _, -I -I -r -r -I 10 _ r__r__r__I_ _r r__�__r __r__I__,__r__r__i _ 8 ' __I _J__!__!_ I 8 _I _I 4 1 2 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) United Properties Powers Place APPENDIX C PROPOSED DRAINAGE EXHIBIT Storm Water Narrative 9/15/13 Page 18 '� EVS 110250 Valley View Rd., Suite 123 1 Eden Prairie, MN 55344 -3534 1 Phone: 952.646.0236 1 Fax: 952.646.0290 1 www.evs- enq.com 'YIY � � � Ir111Y IY L�7V 1 h i Powers Place Chanhassen, NIN SUBCATCHMENTS DESCRIPTION AREA CN P1S WOODS, HSG C 3.06 AC 70 P2S P3S r P4S f l WOODS, HSG C IMPERVIOUS GRASS COVER, HSG C IMPERVIOUS GRASS COVER, HSG C IMPERVIOUS 5.50 AC 70 0.66 AC 98 0.07 AC 74 4.09 AC 98 0.26 AC 74 3.30 AC 98 NOTE 1. REACH P1R COMBINES THE HYDROGRAPH OF EACH POND OR SUBCATCHMENT DISCHARGING OFF -SITE TO PROVIDE AN OVERALL PEAK DISCHARGE TIME AND RATE. N 0 50 1W SCALE IN FEET ___vm Proposed Drainage Exhibit PAGE No. 2 9.15.13 United Properties Powers Place 9/15/13 APPENDIX D PROPOSED HYDROCAD Storm Water Narrative Page 19 EVS 110250 Valley View Rd., Suite 123 1 Eden Prairie, MN 55344 -3534 1 Phone: 952.646.0236 1 Fax: 952.646.0290 1 www.evs- eng.com P1S West Undisturbed P2S P3S --0 3P East ndisturbed & North; Developed Northeast Vault E rance Roads P 1 R P4S South Va South; Developed Subcat Reach on Link uIt UP - Chan HydroCAD Prepared by EVS, Inc. HvdroCAD® 10.00 s/n 01636 @2011 Type II 24 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Printed 9/14/2013 Stage- Area - Storage for Pond P3P: Northeast Vault Elevation Surface Storage (feet) (sq -ft) (cubic -feet) 926.00 8,232 0 926.10 8,232 774 926.20 8,232 1,548 926.30 8,232 2,321 926.40 8,232 3,095 926.50 8,232 3,869 926.60 8,232 4,643 926.70 8,232 5,417 926.80 8,232 6,190 926.90 8,232 6,964 927.00 8,232 7,738 927.10 8,232 8,512 927.20 8,232 9,286 927.30 8,232 10,060 927.40 8,232 10,833 927.50 8,232 11,607 927.60 8,232 12,381 927.70 8,232 13,155 927.80 8,232 13,929 927.90 8,232 14,702 928.00 8,232 15,476 928.10 8,232 16,250 928.20 8,232 17,024 928.30 8,232 17,798 928.40 8,232 18,571 928.50 8,232 19,345 928.60 8,232 20,119 928.70 8,232 20,893 928.80 8,232 21,667 928.90 8,232 22,440 929.00 8,232 23,214 929.10 8,232 23,988 929.20 8,232 24,762 929.30 8,232 25,536 929.40 8,232 26,309 929.50 8,232 27,083 929.60 8,232 27,857 929.70 8,232 28,631 929.80 8,232 29,405 929.90 8,232 30,179 930.00 8,232 30,952 930.10 8,232 31,726 930.20 8,232 32,500 930.30 8,232 33,274 930.40 8,232 34,048 930.50 8,232 34,821 930.60 8,232 35,595 930.70 8,232 36,369 930.80 8,232 37,143 930.90 8,232 37,917 931.00 8,232 38,690 931.10 8,232 39,464 931.20 8,232 40,238 Elevation Surface Storage (feet) (sq -ft) (cubic -feet) 931.30 8,232 41,012 931.40 8,232 41,786 931.50 8,232 42,559 931.60 8,232 43,333 931.70 8,232 44,107 931.80 8,232 44,881 931.90 8,232 45,655 932.00 8,232 46,428 932.10 8,232 47,202 932.20 8,232 47,976 932.30 8,232 48,750 932.40 8,232 49,524 932.50 8,232 50,298 932.60 8,232 51,071 932.70 8,232 51,845 932.80 8,232 52,619 932.90 8,232 53,393 933.00 8,232 54,167 933.10 8,232 54,940 933.20 8,232 55,714 933.30 8,232 56,488 933.40 8,232 57,262 933.50 8,232 58,036 933.60 8,232 58,809 933.70 8,232 59,583 933.80 8,232 60,357 933.90 8,232 61,131 934.00 8,232 61,905 934.10 8,232 61,905 934.20 8,232 61,905 934.30 8,232 61,905 934.40 8,232 61,905 934.50 8,232 61,905 934.60 8,232 61,905 934.70 8,232 61,905 934.80 8,232 61,905 934.90 8,232 61,905 935.00 8,232 61,905 935.10 8,232 61,905 935.20 8,232 61,905 935.30 8,232 61,905 935.40 8,232 61,905 UP - Chan HydroCAD Type 1124 -hr 100 -Yr, 24-Hr Rainfall=6. 00 " Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 02011 HydroCAD Software Solutions LLC Stage- Area - Storage for Pond P4P; South Vault Elevation Surface Storage (feet) (sq -ft) (cubic -feet) 929.00 6,860 0 929.10 6,860 645 929.20 6,860 1,290 929.30 6,860 1,935 929.40 6,860 2,579 929.50 6,860 3,224 929.60 6,860 3,869 929.70 6,860 4,514 929.80 6,860 5,159 929.90 6,860 5,804 930.00 6,860 6,448 930.10 6,860 7,093 930.20 6,860 7,738 930.30 6,860 8,383 930.40 6,860 9,028 930.50 6,860 9,673 930.60 6,860 10,317 930.70 6,860 10,962 930.80 6,860 11,607 930.90 6,860 12,252 931.00 6,860 12,897 931.10 6,860 13,542 931.20 6,860 14,186 931.30 6,860 14,831 931.40 6,860 15,476 931.50 6,860 16,121 931.60 6,860 16,766 931.70 6,860 17,411 931.80 6,860 18,056 931.90 6,860 18,700 932.00 6,860 19,345 932.10 6,860 19,990 932.20 6,860 20,635 932.30 6,860 21,280 932.40 6,860 21,925 932.50 6,860 22,569 932.60 6,860 23,214 932.70 6,860 23,859 932.80 6,860 24,504 932.90 6,860 25,149 933.00 6,860 25,794 933.10 6,860 26,438 933.20 6,860 27,083 933.30 6,860 27,728 933.40 6,860 28,373 933.50 6,860 29,018 933.60 6,860 29,663 933.70 6,860 30,307 933.80 6,860 30,952 933.90 6,860 31,597 934.00 6,860 32,242 934.10 6,860 32,887 934.20 6,860 33,532 Elevation Surface Storage (feet) (sq -ft) (cubic -feet) 934.30 6,860 34,177 934.40 6,860 34,821 934.50 6,860 35,466 934.60 6,860 36,111 934.70 6,860 36,756 934.80 6,860 37,401 934.90 6,860 38,046 935.00 6,860 38,690 935.10 6,860 39,335 935.20 6,860 39,980 935.30 6,860 40,625 935.40 6,860 41,270 935.50 6,860 41,915 935.60 6,860 42,559 935.70 6,860 43,204 935.80 6,860 43,849 935.90 6,860 44,494 936.00 6,860 45,139 936.10 6,860 45,784 936.20 6,860 46,428 936.30 6,860 47,073 936.40 6,860 47,718 936.50 6,860 48,363 936.60 6,860 49,008 936.70 6,860 49,653 936.80 6,860 50,298 936.90 6,860 50,942 937.00 6,860 51,587 937.10 6,860 51,587 937.20 6,860 51,587 937.30 6,860 51,587 937.40 6,860 51,587 937.50 6,860 51,587 937.60 6,860 51,587 937.70 6,860 51,587 937.80 6,860 51,587 937.90 6,860 51,587 938.00 6,860 51,567 938.10 6,860 51,587 938.20 6,860 51,587 938.30 6,860 51,587 UP - Chan HydroCAD Prepared by EVS, Inc. 2011 Type// 24 -hr 2 -Yr, 24 -Hr Rainfall= 2.80" Printed 9/1412013 Time span =0.00 -24.00 hrs, dt =0.05 hrs, 481 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method SubcatchmentPIIS: West Undisturbed RunoffArea= 133,334 sf 0.00% Impervious Runoff Depth >0.60" Flow Length =250' Slope= 0.1000'/' Tc =43.7 min CN =70 Runoff--1.00 cfs 0.152 of SubcatchmentP2S: East Undisturbed& Runoff Area = 268,015 sf 10.69% Impervious Runoff Depth >0.73" Flow Length =200' Slope= 0.2000 7' Tc =27.7 min CN =73 Runoff =3.64 cfs 0.374 of SubcatchmentP3S: North; Developed Runoff Area= 181,186 sf 98.26% Impervious Runoff Depth >2.57" Tc =10.0 min CN =98 Runoff =14.26 cfs 0.889 of SubcatchmentP4S: South; Developed Runoff Area = 155,378 sf 92.57% Impervious Runoff Depth >2.35" Tc =10.0 min CN =96 Runoff =11.73 cfs 0.699 of Reach P1 R: Inflow =7.07 cfs 2.039 of Outflow =7.07 cfs 2.039 of Pond P3P: Northeast Vault Peak EIev= 931.47' Storage= 19,130 cf Inflow =14.26 cfs 0.889 of Outflow =1.44 cfs 0.845 of Pond P4P: South Vault Peak EIev= 934.28' Storage= 14,691 cf Inflow =11.73 cfs 0.699 of Outflow =1.35 cfs 0.668 of Total Runoff Area = 16.940 ac Runoff Volume = 2.114 of Average Runoff Depth = 1.50" 52.50% Pervious = 8.893 ac 47.50% Impervious = 8.047 ac UP - Chan HydroCAD Prepared by EVS, Inc. HvdroCAD® 10.00 s/n 0163( Type 1124 -hr 2 -Yr, 24 -Hr Rainfall= 2.80'1 Printed 9/14/2013 Summary for Subcatchment PIS: West Undisturbed Runoff = 1.00 cfs @ 12.48 hrs, Volume= 0.152 af, Depth> 0.60" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 2 -Yr, 24 -Hr Rainfall= 2.8011 Area (sf) CN Description 133,334 70 Woods Good HSG C 133,334 100.00% Pervious Area Tc Length Slope min) (feet) (ft/ft) 43.7 250 0.1000 Velocity Capacity Description 0.10 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" Subcatchment PIS: West Undisturbed Hydrograph I I I � I I I I II I I I II I I I I I I I O I I I I I I 1 I j I I I 1II 1 I I I I I I I I I I I I . 00 I c( s Type I 24 -h Zyi 24 -Hr Rainall`= 2.$0" I Runoff Are= 133y334 Sf Runoff Vbinme =0.152 af Runoff Dpth >0.60" I FIoW Lenlgth =250' SlopeT0.1000 'J' Tc =43.7 min CN"70 " 0 I I I I I I -1 f I I I I I i I I I I I I I I I j I I I I l I I I I i -r I I I I I j I I I -1 I I I I 1 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 20� 21 22 23 24 Time (hours) ■Runoff UP - Chan HydroCAD Prepared by EVS, Inc. HydroCAD® 10.00 s/n 01636 Type// 24 -hr 2 -Yr, 24 -Hr Rainfall = 2.80" Printed 9/14/2013 LLC Summary for Subcatchment P2S: East Undisturbed & Entrance Roads Runoff = 3.64 cfs @ 12.25 hrs, Volume= 0.374 af, Depth> 0.73" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 2 -Yr, 24 -Hr Rainfall = 2.80" Area (sf) CN Description 239,368 70 Woods, Good, HSG C 28,647 98 Paved roads w /curbs & sewers, HSG C 268,015 73 Weighted Average 239,368 89.31 % Pervious Area 28,647 10.69% Impervious Area Tc Length Slope min) (feet) (ft/ft) 27.7 200 0.2000 M U 0 LL Capacity Description 0.12 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" Subcatchment P2S: East Undisturbed & Entrance Roads Hydrograph I I I I I I 1 1 1 1 I I I I Type 1124 -h� j C 2`.r 1 - T 1 I I I 1 I 24 -Hr Rainfall-2.80". Runoff Area= 268;011'5 sf Runoff Volum&0.374 of Runoff Dopth>0.73 1 Flow Lengtlh =200' Sllope= 0.2000 7' Tc -27iI 7 m' in I I I I I I I I I CN =73 1 I I I I I I 1 I 1 I I 1 I I I I I I 1 I I I I 1 I 1 I I I I I I I 7 8 9 Time (hours) 1 I I 1 1 I I I I 1 1 1 1 I I 1 1 1 I 1 I 1 1 1 1 I I 1 I 1 I I 1 1 1 1 1 I 1 I I I I I I I I I I I I I I I I I I I I I I I I I 1 I I I I I I I I 1 1 1 I 1 1 1 1 I I I 1 1 I 1 I 1 I 1 I I I I I 1 1 1 1 I I 1 1 1 1 1 I I 1 1 1 I 1 1 I 1 1 1 1 1 1 1 I 1 I I I I I I I I I I I 1 I I I I I I 1 I I 1 1 1 1 1 1 I 1 1 1 I I I I I I I I I 1 I I 1 I I i I I I i I 1 1 1 1 1 1 I 1 I I 1 1 1 I 1 1 1 1 I I 1 1 1 I 1 1 I 1 1 I I I I I 1 1 I I I I 1 I I I 19 20 UP - Chan HydroCAD Prepared by EVS, Inc. HwimrADOO 10.00 s/n 01636 © 2011 HvdroCAD Software Type 1124 -hr 2 -Yr, 24 -Hr Rainfall= 2.80" Printed 9/14/2013 Summary for Subcatchment P3S: North; Developed Runoff = 14.26 cfs @ 12.01 hrs, Volume= 0.889 af, Depth> 2.57" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 2 -Yr, 24 -Hr Rainfall= 2.80" Area (sf) CN Description 3,154 74 >75% Grass cover, Good, HSG C 178,032 98 Roofs HSG C 181,186 98 Weighted Average 3,154 1.74% Pervious Area 178,032 98.26% Impervious Area Tc Length Slope Velocity Capacity Description 10.0 a LL Direct Entry, Subcatchment P3S: North; Developed - yple H -Z4y�, -- - 1 LTrI 1 1 I I I I I I I I I I 1 I -24 HfRfiirifa1P- 2.8O"_-;_ ; - [tl.titoff Aroa=181 -106 6f; - Ftunoff Volume - -6.$89 of Adhoff Depth >2.57•r - T- OMO;minl; I I 1 I 1 1 1 1 1 1 I 1 LL__1__ I__J I I I 1 1 I I I I I I I I I I I I I I I I 1 I 1 I I I I 1 I 1 I I 1 1 I I I I I I I I i I_ I 1 1 I I 1 1 I 1 1 1 I I I I 1 I I I I I 1 I 1 I I I I I I 1 I I I I I I I 1 I 1 1 1 1 I 1 1 I 1 1 I I I I I 1 I I I I I I I 1 I 1 1 I 1 1 1 I 1 1 I I I 1 1 I 1 I 1 I I I I I I I I I I I 1 I I I I I I 1 I I I 1 I I 1 I 1 1 1 I I I I I I I I 1 I I I I 1 1 1 I 1 1 1 1 1 I I 1 I I 1 1 1 I I 1 I I I I I I 1 I I I I I I I I I I I I I 1 I I 1 I I I I 1 I I I I I I I Time (hours) p Runoff UP - Chan HydroCAD Type 1124 -hr 2 -Yr, 24 -Hr Rainfall =2.80" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD ®10.00 S/n 01636 © 2011 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment P4S: South; Developed Runoff = 11.73 cfs @ 12.01 hrs, Volume= 0.699 af, Depth> 2.35" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 2 -Yr, 24 -Hr Rainfall= 2.80" Area (sf) CN Description 11,543 74 >75% Grass cover, Good, HSG C 143,835 98 Roofs, HSG C 155,378 96 Weighted Average 11,543 7.43% Pervious Area 143,835 92.57% Impervious Area Tc Length Slope Velocity Capacity Description 10.0 3 LL Direct Entry, Subcatchment P4S: South; Developed -7- ---- - -- - -- I I 1 I I I I 1 1 1 - - L 11.73 I I 1 I 1 T ype ,N 24 -hr Z- Yr- -, -- - 1 I 1 1 �4 =HY R�irifa;11J2:8Q" "I - -" I Runoff Area' =1$5;378 S-fj Runoff Volume =0.699.at, u ff 1 _th >2._35' - - -1 R no r 1 TC- 1Q,QIIm;in! I 1 I 1 y N= 1 1 GI 96 1 1 1 1 1 1 I 1 1 1 1 I I I I I 1 I 1 1 1 1 1 i 1 1 I 1 I I I I I I I I I I I I 1 I I i I I I I I I I I I I I 1 I I I I I I I I cfs I 1 I 1 1 1 1 1 I I I I I 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I I I I I I I I I I I j I I I I I I I I I I I I I I I I I I I I I 1 I I 1 I I I I I 1 1 I r__r__r__I___I__7__y__7__r__r_. I I I I I I I I I I I I 1 I I 1 I I I I I I I 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 I I I I - r__ r_ I I I I Time (hours( ■ Runoff UP - Chan HydroCAD Prepared by EVS, Inc. HvHmr:ADdb 10 00 s/n 01636 Type 1124 -hr 2 -Yr, 24 -Hr Rainfall = 2.80" Printed 9/14/2013 Summary for Reach P1R: Inflow Area = 16.940 ac, 47.50% Impervious, Inflow Depth > 1.44" for 2 -Yr, 24 -Hr event Inflow = 7.07 cfs @ 12.28 hrs, Volume= 2.039 of Outflow = 7.07 cfs @ 12.28 hrs, Volume= 2.039 af, Atten= 0 %, Lag= 0.0 min Routing by Stor- Ind +Trans method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Reach P1R: Hydrograph I I I I I I I I I I I I 1 p Inflow 1 1 1 1 1 p OOHIOw I I I 1 1 I 1 1 I 1 I 1 1 1 1 1 I 1 1 1 1 I 1 1 1 1 1 I 1 I I I I 1 1 1 1 I 1 1 I 1 I 1 1 I 1 1 1 1 I I I 1 1 1 I 1 1 I 1 I I 1 I I -- __1_____� 1 1 1 1 I 1 1 1 I I I 1 1 I 1 1 1 I I I I I I I I I 1 I 1 I I I 1 1 1 1 I I 1 I 1 1 1 1 I 1 1 1 1 I 1 I 1 I 1 I 1 I I I I I I I I I I I I 1 I I I I 1 I I 1 I I I I 1 1 I 1 I I I I I 1 1 I I I I I I I I I I I I I I I I 1 1 I I I I I Time (hours) 1 I 1 1 i I I I I I I I I I 1 1 1 1 1 I I 1 F _I _� _J -f _I _-1 _• I,nfloWv Ater= l0.9', 7.c I 1 I I 1 1 1 1 1 I 1 6 1 1 1 I 1 1 1 I 1 1 1 1 I 1 I 1 I I I I 5 1 I I I 1 I I 1 I 1 I I 1 1 I 1 I 1 1 1 1 1 L I I I 1 I I I I I 1 1 1 V 1 1 .r 4 1 1 1 O 1 1 -I _y -7 -r -1 _y _7 -r [L 1 1 I I I I I I I 3 F I I I 2 I I 1 I 1 I I 1 1 J__1__L_J__J__1__L__I__J_ 1 I I I I I I I I I I I I 1 I I I I I I I I I I I I I I I I I I I I I 1 p Inflow 1 1 1 1 1 p OOHIOw I I I 1 1 I 1 1 I 1 I 1 1 1 1 1 I 1 1 1 1 I 1 1 1 1 1 I 1 I I I I 1 1 1 1 I 1 1 I 1 I 1 1 I 1 1 1 1 I I I 1 1 1 I 1 1 I 1 I I 1 I I -- __1_____� 1 1 1 1 I 1 1 1 I I I 1 1 I 1 1 1 I I I I I I I I I 1 I 1 I I I 1 1 1 1 I I 1 I 1 1 1 1 I 1 1 1 1 I 1 I 1 I 1 I 1 I I I I I I I I I I I I 1 I I I I 1 I I 1 I I I I 1 1 I 1 I I I I I 1 1 I I I I I I I I I I I I I I I I 1 1 I I I I I Time (hours) UP - Chan HydroCAD Type 11 24 -hr 2 -Yr, 24 -Hr Rainfall = 2.80" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD ®10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Page 8 Summary for Pond P3P: Northeast Vault Inflow Area = 4.159 ac, 98.26% Impervious, Inflow Depth > 2.57" for 2 -Yr, 24 -Hr event Inflow = 14.26 cfs @ 12.01 hrs, Volume= 0.889 of Outflow = 1.44 cfs @ 12.50 hrs, Volume= 0.845 af, Atten= 90 %, Lag= 29.4 min Primary = 1.44 cfs @ 12.50 hrs, Volume= 0.845 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Peak Elev= 931.47' @ 12.50 hrs Surf.Area= 8,232 sf Storage= 19,130 cf Plug -Flow detention time= 177.7 min calculated for 0.844 of (95% of inflow) Center -of -Mass det. time= 148.5 min ( 906.6 - 758.1 ) Volume Invert Avail.Storage Storage Description #1 929.00' 38,690 cf Custom Stage Data (Prismatic)Listed below (Recalc) 41,160 cf Overall x 94.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (sq -ft) (cubic -feet) (cubic -feet) 929.00 8,232 0 0 934.00 8,232 41,160 41,160 Device Routing Invert Outlet Devices #1 Primary 926.45' 15.0" Round Culvert L= 175.0' RCP, groove end projecting, Ke= 0.200 Inlet/ Outlet Invert= 926.45'/ 915.50' S=0.06267' Cc= 0.900 n=0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 929.00' 6.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 931.40' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 4.00 Width (feet) 0.50 0.50 Primary OutFlow Max =1.44 cfs @ 12.50 hrs HW= 931.47' (Free Discharge) Culvert (Passes 1.44 cfs of 15.49 cfs potential flow) 2= Orifice /Grate (Orifice Controls 1.41 cfs @ 7.18 fps) 3= Custom Weir /Orifice (Weir Controls 0.03 cfs @ 0.88 fps) UP - Chan HydroCAD Type 1124 -hr 2 -Yr, 24 -Hr Rainfall = 2.80" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Page 9 U 3 O LL Pond P3P: Northeast Vault -1, 14., 1'nflouv ,Acea - — 159 -I;ac I Pel 9 7 II_ -_ _ I I I___I__ +__ + 1 1_J__J__J I I I I 1 I I I I I 1 I 1 I I I I I I I I 1 I I I I I 1 1 I 1 I I I I 1 I 1 I I 1 I I I I 1 I I I I I I I I I I I I I 1 I I I I I 4—F I I I I I I I I 10 11 12 13 Time (hours) __ __f__I__y__- 1__f__f __I -- fS ■In0ow 0 Primary L_J__J__1__L__L_J__ I I 1 I I I I I I I I I I I I I I I I I I _,__7__r__r __I__�__r__r__1__ I I _. F _I _y -{ I I I I I I I I I I I I I I I I 1 I I I I I I 1 I I I I I I I I I 1 I I I I I I I 1 I J__1__L_JJ__1__L__L_J__- I I I I I I I I I I L I I I I 1 1 I I _I__ I I I I I I I I I 1 I I I I I I I I I 1 I I I I I I I I 1 I I I I I I I I r_ _,_ _I I I I I I I 1 I I I I I I I I I I I I I 1 I _ L- _1__J__1__L_J__J__L- _L__L_J__. I I I I I I 1 I I I I 1 UP - Chan HydroCAD Type // 24 -hr 2 -Yr, 24 -Hr Rainfall= 2.80" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Page 10 Summary for Pond P4P: South Vault Inflow Area = 3.567 ac, 92.57% Impervious, Inflow Depth > 2.35" for 2 -Yr, 24 -Hr event Inflow = 11.73 cfs @ 12.01 hrs, Volume= 0.699 of Outflow = 1.35 cfs @ 12.45 hrs, Volume= 0.668 af, Atten= 89 %, Lag= 26.2 min Primary = 1.35 cfs @ 12.45 hrs, Volume= 0.668 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Peak Elev= 934.28' @ 12.45 hrs Surf.Area= 6,860 sf Storage= 14,691 cf Plug -Flow detention time= 147.7 min calculated for 0.668 of (96% of inflow) Center -of -Mass det. time= 121.3 min ( 898.4 - 777.1 ) Volume Invert Avail.Storage Storage Description #1 932.00' 32,242 cf Custom Stage Data (Prismatic)Listed below (Recalc) 34,300 cf Overall x 94.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (sq -ft) (cubic -feet) (cubic -feet) 932.00 6,860 0 0 937.00 6,860 34,300 34,300 Device Routing Invert Outlet Devices #1 Primary 931.85' 15.0" Round Culvert L= 355.0' RCP, groove end projecting, Ke= 0.200 Inlet/ Outlet Invert= 931.85'/902.25' S=0.08347' Cc= 0.900 n=0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 932.00' 6.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 934.30' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 4.00 Width (feet) 0.50 0.50 Primary OutFlow Max =1.35 cfs @ 12.45 hrs HW= 934.28' (Free Discharge) Culvert (Passes 1.35 cfs of 9.92 cfs potential flow) 2= Orifice /Grate (Orifice Controls 1.35 cfs @ 6.86 fps) 3= Custom Weir /Orifice ( Controls 0.00 cfs) UP - Chan HydroCAD Type 1124 -hr 2 -Yr, 24- Hr Rainfall= 2.80" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD ®10 00 s/n 01636 02011 HydroCAD Software Solutions LLC Page 11 LL Pond P4P: South Vault ------------ I 1 v 1 1 1 1 I 1 f ni6N "Area =4.60TAC v I I I I I I I 1 I 1 _Pear =fev= 934:x$ ";_ I I I I I I I I I I i i 1 I I I I I I I I I I I I I I I I I I i i I I I 1 I I I I I I I I I I I 1 1 I I I v v I i I I I I I I I I I I I 1 1 I 1 I - I I I I I 1 I 1 I I � I I I I I I I I I I I I I I I 1 I I v I ' - -I - -J - a-- L-- '--- '-- L- -L - -I- 1.3° I 1 1 I 1 1 I I I I I I I I I 1 FM—In-fl-ow--h s 1 1 1 I 1 I I 1 1 0 Primary I I I 1 1 I 1 1 1 I 1 I I 1 1 I 1 I I I 1 II II 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I 1 1 I 1 1 I I I I I I I 1 I I I I I I I I 1 I I I I I I I I I I I 11 11 I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I I I I I I 1 I I I I I I 1 I I I I 1 I I I 1 1 _ _ L_J__J__1__L__I__J__1__L I I I 1 I I I I I I I -L I 1 1 I I 1 I I 1 1 11 12 13 14 15 16 17 16 19 Time (hours) UP - Chan HydroCAD Prepared by EVS, Inc. HydroCAD® 10.00 s/n 01636 Type 11 24 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Printed 9/14/2013 LLC Time span =0.00 -24.00 hrs, dt =0.05 hrs, 481 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method SubcatchmentP1S: West Undisturbed Runoff Area = 133,334 sf 0.00% Impervious Runoff Depth >1.44" Flow Length =250' Slope= 0.1000'/' Tc =43.7 min CN =70 Runoff--2.81 cfs 0.368 of SubcatchmentP2S: East Undisturbed& Runoff Area = 268,015 sf 10.69% Impervious Runoff Depth >1.66" Flow Length =200' Slope= 0.2000'P Tc =27.7 min CN =73 Runoff =9.08 cfs 0.850 of SubcatchmentP3S: North; Developed Runoff Area= 181,186 sf 98.26% Impervious Runoff Depth >3.96" Tc =10.0 min CN =98 Runoff =21.58 cfs 1.372 of Subcatchment P4S: South; Developed Runoff Area = 155,378 sf 92.57% Impervious Runoff Depth >3.73" Tc =10.0 min CN =96 Runoff =18.12 cfs 1.109 of Reach P1 R: Inflow =18.51 cfs 3.603 of Outflow =18.51 cfs 3.603 of Pond P3P: Northeast Vault Peak Elev= 932.57' Storage = 27,587 cf Inflow =21.58 cfs 1.372 of Outflow =3.78 cfs 1.314 of Pond P4P: South Vault Peak Elev= 935.38' Storage= 21,805 cf Inflow =18.12 cfs 1.109 of Outflow =3.51 cfs 1.070 of Total Runoff Area = 16.940 ac Runoff Volume = 3.700 of Average Runoff Depth = 2.62" 52.50% Pervious = 8.893 ac 47.50% Impervious = 8.047 ac UP - Chan HydroCAD Prepared by EVS, Inc. Hvdrnr.AmQ in on s/n 01636 © 2011 Type 1124 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Printed 9/14/2013 Summary for Subcatchment P1S: West Undisturbed Runoff = 2.81 cfs @ 12.44 hrs, Volume= 0.368 af, Depth> 1.44" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Area (sf) CN Description 133,334 70 Woods Good HSG C 133,334 100.00% Pervious Area Tc Length Slope min) (feet) (ft/ft) 43.7 250 0.1000 i; LL Description 0.10 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" Subcatchment P1S: West Undisturbed 2.81 I I I Yype 1124 -hF 1'0 -Yr I 1 1 1 I I I Rainfall--4.20"1 I I I 24 -Hr a -Runoff Aram =133`y334 of -" Runoff V61dme =0.368 of Runoff Deptha1.44" 1 I I Fllow Length =250' J I I Tc =43.7 min j CN =7dI I I I I I 1 I I I 1 I I I I 1 -------------------------- -----r I 1 I 1 I 1 I 1 1- ■RunoR Jfs I 1 1 I 1 1 1 1 I 1 I I 1 I 1 1 1 I I I I I I I I I I I I I I I I 1 I I 1 I I I I I 1 I I 1 I I I i I 1 1 1 I 1 I I I 1 I 1 1 1 I 1 1 1 1 1 1 1 I I 1 1 1 1 1 1 1 1 1 I I 1 I 1 1 i I 1 1 I I I 1 I 1 1 I I 1 1 1 1 I I I I I 1 1 1 I I I 1 I I 1 1 1 I I 1 1 1 I 1 1 1 I 1 1 1 1 1 1 I I I 1 I 1 1 1 I 1 I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I I 1 I I I I I I I I I I 1 1 1 1 1 I I 1 1 1 1 1 I 1 I I I 1 1 1 1 1 I 1 I I I I 1 I 1 I 1 I I 1 1 1 I 1 I 1 1 I 1 1 1 I 1 1 i 1 I I 1 1 1 I I 11 12 13 14 15 16 17 Time (hours) UP - Chan HydroCAD Prepared by EVS, Inc. HydroCAD® 10.00 s/n 01636 Type 11 24 -hr 10 -Yr, 24 -Hr Rainfall = 4.20" Printed 9/14/2013 LLC Summary for Subcatchment P2S: East Undisturbed & Entrance Roads Runoff = 9.08 cfs @ 12.23 hrs, Volume= 0.850 af, Depth> 1.66" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 10 -Yr, 24 -Hr Rainfall = 4.20" Area (sf) CN Description 239,368 70 Woods, Good, HSG C 28,647 98 Paved roads w /curbs & sewers, HSG C 268,015 73 Weighted Average 239,368 89.31 % Pervious Area 28,647 10.69% Impervious Area Tc Length Slope min) (feet) (ft/ft) 27.7 200 0.2000 `u i; LL Capacity Description 0.12 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" Subcatchment P2S: East Undisturbed & Entrance Roads Hydrograph 0 1 9.08 9 Type II 24 -hi 8 1 I I I I I 24 -Mr Ra%nfaM'4.20" - - : - - -- 7 1 - Runoff Area =268'011,5_sf--- 6 Runoff Volum&O.880 of 5 Runoff Depth >1.66'° 4 -Blow Length= 200' - -I, - -; 3-' Tc =27.7 mui 2 CN:;7S 1 --- -r - -r- __r__r __r__r.__I__r 1 I I I 1 1 I I I I I 1 8 9 1 1 I I I 1 I I I I I 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I I I I I I I 1 1 I I I I I 1 I I I 1 1 1 1 I 1 1 1 1 I I I I I I I 1 I I I I 1 I I I I I I - - -- --------------------------- I I I I I I I I I _ 1 1_ 1__L__L__I__ I I11__L__I__ -. I I I I I I I 1 I I I I I I I 1 I I I I I I I I I I I 1 1 I I I I I I I 1 1 1 1 I 1 I I I I I 1 I I 1 I I 1 1 I I I I 1 I I 1 I I I I I I I I I I I I Time (hours) 19 20 UP - Chan HydroCAD Prepared by EVS, Inc. Hvrtrnl in on s/n 01636 © 2011 Type 1124 -hr 10 -Yr, 24 -Hr Rainfall = 4.20" Printed 9/14/2013 Summary for Subcatchment P3S: North; Developed Runoff = 21.58 cfs @ 12.01 hrs, Volume= 1.372 af, Depth> 3.96" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Area (sf) CN Description 3,154 74 >75% Grass cover, Good, HSG C 178,032 98 Roofs HSG C 181,186 98 Weighted Average 3,154 1.74% Pervious Area 178,032 98.26% Impervious Area Tc Length Slope Velocity Capacity Description 10.0 3 1e LL Direct Entry, Subcatchment P3S: North; Developed Hydrograph I J J 21. I I I I I I 110 -lVrl I I I I I I 1 I -24 -W RAi)faal= 4.-2W, ' I I I I I I I I I I I u o ,fir a 'F 1 106 �# I#ttn Volume= .37_�I_at _r _f. _I -I -4 -Runoff Depot >3.96" I• I I I I I I • I I I I I I I " I v I I rI --I -y -- -T -- -I- -I -I I 1 1 1 58 cfs - ; - -I - -; - -', -- ; -- ;- ;-- �- L - -� -- [_4 } _T _Y _1 ------ _-� _♦ _T _Y L J__ J__L__L__L IJ} -r -r -I -I -y -y -T -t -I 1 1 IL T__r__r__I___I__y__y____I I I I Time (hours) ■ Runotf UP - Chan HydroCAD Type// 24 -hr 10 -Yr, 24 -Hr Rainfall = 4.20" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD@ 10.00 S/n 01636 @2011 HydroCAD Software Solutions LLC Page 16 Summary for Subcatchment P4S: South; Developed Runoff = 18.12 cfs @ 12.01 hrs, Volume= 1.109 af, Depth> 3.73" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Area (sf) CN Description 11,543 74 >75% Grass cover, Good, HSG C 143,835 98 Roofs HSG C 155,378 96 Weighted Average 11,543 ryFffr!Riripf�a1= - Ruhoki-�4rOa 1$i -5,73", 1 f 7.43% Pervious Area 143,835 10 rL 9 92.57% Impervious Area Tc Length Slope Velocity Capacity Description 10.0 Direct Entry, Subcatchment P4S: South; Developed Hydrograph 20 _I _ 1 _J _J _1L _L _L _ I I I I I I I I I 18 18 H 17 s " _1-0- Y-- -- -r - -- ,I-- - - 15 4 1 1 1 1 =241 43�"__;__ 13 ryFffr!Riripf�a1= - Ruhoki-�4rOa 1$i -5,73", 1 f 11 H-�- ume=-:f- w- t-bI a 10 rL 9 ---k- - -- -- - -L - -I - -9 - Ruhaf_Deptku3.73" -;_- 7 6 ' -� 1ID;l�} _4 _L _I _I I I I I I I I I 5 1 3 __1___1__�__�__r__r __r__r__1___1__ 2 1 1 1 1 1 1 1 1 1 I I 1 1 1 I I I 1 1 1 I I 1 I I I I I I 1 1 I 1 I I I I 1 1 I I I I I 1 1 I 1 1 1 1 I 1 I 1 1 I 1 1 I I I - T - -S - -i - -i - Y-- I-- ,-- T- 7 - -T - -i -- 1 1 - 11 y 1 1 1 1 I I _._ 1 _L _L _I _� I 1 I I I I I I I I i I I I I I I I I I I 1 I 1 I I 22 Time (hours) p Runoff UP - Chan HydroCAD Type 1124 -hr 10 -Yr, 24 -Hr Rainfall = 4.20" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Page 17 Summary for Reach P1 R: Inflow Area = 16.940 ac, 47.50% Impervious, Inflow Depth > 2.55" for 10 -Yr, 24 -Hr event Inflow = 18.51 cfs @ 12.26 hrs, Volume= 3.603 of Outflow = 18.51 cfs @ 12.26 hrs, Volume= 3.603 af, Atten= 0 %, Lag= 0.0 min Routing by Stor- Ind +Trans method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Reach P1 R: 11 12 13 Time (hours( 1 i I � I I 1 I � Inflow outflow zo 19 1 I 11 1-- r- -r -, -- 18.: 18 ' I I -I --- -'1 -i I I I I ' 1 16 1 1 1 1 1 1 1 1 I 1 1 1 1 15 I I 1 1 1 1 I 1 1 I 1 I I I I I I 14 1 r__r - -1 1 1 1 1 I I 1 1 1 1 13 1 I 1 1 1 12 • ,' , 1 1 1 1 1 1 I I -T -I- -I I 1 1 1 1 .__ 1__�__�__ {__I___I__�__ {__r__I__ 3 10 o '�,' ,.__ 1___1__r__r__r__I__r__r____1__ 1 1 1 1 1 11 1 LL 9 1 L__I__ s -I -I 1 1 1 i -r 4 J__ 1__L__1__J__J_ 2 11 12 13 Time (hours( 1 i I � I I 1 I � Inflow outflow jjp 1 ' 1 1 - - -- I I I -I --- -'1 -i I I I I I I I I I 1 1 1 1 1 1 1 1 1 1 I 1 1 1 1 1 I I 1 1 1 1 I 1 1 I 1 I I I I I I I 1 1 1 I 1 r__r - -1 1 1 1 1 I I 1 1 1 1 1 I 1 1 1 I 1 1 1 I 1 I 1 I I 1 1 I I -T -I- -I I 1 1 1 1 1 1 11 12 13 Time (hours( UP - Chan HydroCAD Type lI 24 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 02011 HydroCAD Software Solutions LLC Page 18 Summary for Pond P3P: Northeast Vault Inflow Area = 4.159 ac, 98.26% Impervious, Inflow Depth > 3.96" for 10 -Yr, 24 -Hr event Inflow = 21.58 cfs @ 12.01 hrs, Volume= 1.372 of Outflow = 3.78 cfs @ 12.29 hrs, Volume= 1.314 af, Atten= 82 %, Lag= 16.9 min Primary = 3.78 cfs @ 12.29 hrs, Volume= 1.314 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Peak Elev= 932.57' @ 12.29 hrs Surf.Area= 8,232 sf Storage= 27,587 of Plug -Flow detention time= 164.0 min calculated for 1.311 of (96% of inflow) Center -of -Mass det. time= 138.1 min ( 887.8 - 749.7 ) Volume Invert Avail.Storage Storage Description #1 929.00' 38,690 cf Custom Stage Data (Prismatic)Listed below (Recalc) 41,160 cf Overall x 94.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (sq -ft) (cubic -feet) (cubic -feet) 929.00 8,232 0 0 934.00 8,232 41,160 41,160 Device Routing Invert Outlet Devices #1 Primary 926.45' 15.0" Round Culvert L= 175.0' RCP, groove end projecting, Ke= 0.200 Inlet/ Outlet Invert= 926.45'/915.50' S=0.0626'/' Cc= 0.900 n=0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 929.00' 6.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 931.40' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 4.00 Width (feet) 0.50 0.50 Primary OutFlow Max =3.78 cfs @ 12.29 hrs HW= 932.56' (Free Discharge) ti-Culvert (Passes 3.78 cfs of 17.30 cfs potential flow) 2= Orifice /Grate (Orifice Controls 1.72 cfs @ 8.77 fps) 3=Custom Weir /Orifice (Weir Controls 2.06 cfs @ 3.53 fps) UP - Chan HydroCAD Type 11 24 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 02011 HydroCAD Software Solutions LLC Page 19 Pond P3P: Northeast Vault Time (hours) Hydrograph i _I_ 1 _ -------------------- I__ I__I __I OW 24 �' Q ��jj _I _.� _i _4 _I___I _� _h _I p 1 I I 1 1 I 1 1 I 21.58 �I�J _I _-I _k _4 _I _-J _+ _4 -F -I I I 1 I 1 1 1 1 1 I � Primary 23 __I_____.r__r __r __1_r___ I 22 , 1 L l - Inflow �4, = 469 aE — L-- 1 - -J - -A --L--1--J--J--L--L - -1 -- 21 ,' , , 1 1 __� _r__ 7__r__1 - __I__,__r__r __I__, 1 1 1 1 1 1 1 __r__r_ r__ 7__ r__I__,__ 7__ r__ r__I__ 9 P - t¢= 3,T YZ ; 1- ; 1--'r--I--J--,-------- 18'_____ ,' _ _ 1__! j op1. T/'1 1 _____ I__!__!__1__!___I__!__L__1__!__ 1 1 1 /�'I�/ ", 18 '' 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 18 -1 _y _" _� -1 _I -T _• -' _y _y -r -1 -y _} _� -1 _y _^ _- _- -1 I __ I _ _ __I I II __II __I_1 __ II I_I I III I1 3 _yI __+1i __I FI _ III _______rrL __ +__I f______II ______J 12 r_r__r r r rL 114 1 A _-__-_II L I 4 L 10 ____�J 1 _ I rL _ II rL II 71 rL II 9 __I1 J 1 L 1 B 7 _7_1 _1__1 r __r__r__ 1I rL 7 j 1 L 1 L II L I I 1I L 6 Y Y -------------------------- L__I --- _11 __ L_ . 378 cs __j _L _ 11 4 __� - I- 1 1 1 1 I 1 1 2 1 Time (hours) UP - Chan HydroCAD Type// 24 -hr 10 -Yr, 24 -Hr Rainfall= 4.20" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 @ 2011 HydroCAD Software Solutions LLC Page 20 Summary for Pond P4P: South Vault Inflow Area = 3.567 ac, 92.57% Impervious, Inflow Depth > 3.73" for 10 -Yr, 24 -Hr event Inflow = 18.12 cfs @ 12.01 hrs, Volume= 1.109 of Outflow = 3.51 cfs @ 12.27 hrs, Volume= 1.070 af, Atten= 81 %, Lag= 15.6 min Primary = 3.51 cfs @ 12.27 hrs, Volume= 1.070 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Peak Elev= 935.38' @ 12.27 hrs Surf.Area= 6,860 sf Storage= 21,805 cf Plug -Flow detention time= 137.7 min calculated for 1.070 of (96% of inflow) Center -of -Mass det. time= 115.9 min ( 881.5 - 765.7 ) Volume Invert Avail.Storage Storage Description #1 932.00' 32,242 cf Custom Stage Data (Prismatic)Listed below (Recalc) 34,300 cf Overall x 94.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (sq -ft) (cubic -feet) (cubic -feet) 932.00 6,860 0 0 937.00 6,860 34,300 34,300 Device Routing Invert Outlet Devices #1 Primary 931.85' 15.0" Round Culvert L= 355.0' RCP, groove end projecting, Ke= 0.200 Inlet/ Outlet Invert= 931.85'/ 902.25' S=0.08347' Cc= 0.900 n=0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 932.00' 6.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 934.30' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 4.00 Width (feet) 0.50 0.50 Primary OutFlow Max =3.51 cfs @ 12.27 hrs HW= 935.38' (Free Discharge) Culvert (Passes 3.51 cfs of 12.58 cfs potential flow) 2= Orifice /Grate (Orifice Controls 1.67 cfs @ 8.52 fps) 3= Custom Weir /Orifice (Weir Controls 1.83 cfs @ 3.40 fps) UP - Chan HydroCAD Type 1l 24 -hr 10 -Yr, 24 -Hr Rainfall = 4.20" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Page 21 16 15 14 13 12 11 10 LL 9 6 T 6 5 4 3 2 1 0 0 1 Pond P4P: South Vault I _I 1 8 y -y -t -I v i',nftoW ki'e' = *.507,1 a ' 1 _I y -Y -r -r --1 -y 1 1 1 I I I I I I I I I I I 1 1 1 -------------- 1 I 1 I -- -- - - -' -- �- - 3.51 I I I I I I I I I 1 I I I I I - ----- - - - - -, - -J--1--`--'--J--'--`--`--'-- ■ ■Inflow 11 12 13 Time (hours) 23 24 UP - Chan HydroCAD Prepared by EVS, Inc. HydroCAD® 10.00 s/n 0163E Type 1124 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Printed 9/14/2013 LLC Time span =0.00 -24.00 hrs, dt =0.05 hrs, 481 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method SubcatchmentPIIS: West Undisturbed Runoff Area= 133,334 sf 0.00% Impervious Runoff Depth >2.77" Flow Length =250' Slope= 0.1000'P Tc =43.7 min CN =70 Runoff =5.67 cfs 0.707 of SubcatchmentP2S: East Undisturbed& Runoff Area= 268,015 sf 10.69% Impervious Runoff Depth >3.07" Flow Length =200' Slope= 0.2000'P Tc =27.7 min CN =73 Runoff-- 17.26 cfs 1.572 of SubcatchmentP3S: North; Developed Runoff Area= 181,186 sf 98.26% Impervious Runoff Depth >5.75" Tc =10.0 min CN =98 Runoff =30.95 cfs 1.994 of Subcatchment P4S: South; Developed Runoff Area= 155,378 sf 92.57% Impervious Runoff Depth >5.52" Tc =10.0 min CN =96 Runoff =26.24 cfs 1.640 of Reach P1 R: Inflow =37.45 cfs 5.783 of Outflow =37.45 cfs 5.783 of Pond P3P: Northeast Vault Peak Elev= 933.84' Storage= 37,443 cf Inflow =30.95 cfs 1.994 of Outflow =8.26 cfs 1.913 of Pond P4P: South Vault Peak Elev= 936.62' Storage = 29,780 cf Inflow =26.24 cfs 1.640 of Outflow =7.76 cfs 1.590 of Total Runoff Area = 16.940 ac Runoff Volume = 5.914 of Average Runoff Depth = 4.19" 52.50% Pervious = 8.893 ac 47.50% Impervious = 8.047 ac UP - Chan HydroCAD Prepared by EVS, Inc. 0201 Type 1124 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Printed 9/14/2013 Summary for Subcatchment P1S: West Undisturbed Runoff = 5.67 cfs @ 12.42 hrs, Volume= 0.707 af, Depth> 2.77" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Area (sf) CN Description 133,334 70 Woods Good HSG C 133,334 100.00% Pervious Area Tc Length Slope min) (feet) (fuft) 43.7 250 0.1000 0 LL Description 0.10 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" Subcatchment P1S: West Undisturbed _. - �-- �-- �-- I-- -I - -�- 11�C 15. I I I I I Type II pe 24-hr 24-Hr Rainfall= 6.00" RunoffArea =133y334 0 -1- Runoff V blum&0.707 of III -Runoff -D6'pth>�2.77 ;- -- Fllow L'engtlh =250' ,T T'I Tc =43.7 rhin I I I I -C-Nm -I- i I i I I I I I I I I I I 1 I i 'i I I 1 I I IJ 0 1 Time (hours) I I I I I I I I 1 I I I i I I I I I I 1 I I 1 I 1 1 I I I I I I 1 I 1 I I i I I I I I I 1 I I 1 I I I 1 I I 1 I 1 I I I I I 1 I 1 I I I I 1 I I I I I I I 1 I 1 I 1 I I I I I 1 I I I I I I I I I 1 I 1 I 1 I I I I 1 I I I I I I 1 I 1 I I 1 I I 1 I I I I I 1 I I I I I 1 I I I I 1 I I I I I I I I I 1 I 1 I I I I 1 1 I I I I I 1 I 1 I 1 I I I I 1 1 I I I I I I I I I I I I 1 I I I I I I I I I 1 I I I 1 I I I I I 1 I I I 1 I 1 I I 1 I 1 I I I I 1 I I 1 I 1 I I I 1 11 I I I 1 I I I 1 I I 1 I I I I I I I 1 1 1 1 18 UP - Chan HydroCAD Prepared by EVS, Inc. HydroCAD ®10.00 s/n 01636 Type 1124 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Printed 9/14/2013 Summary for Subcatchment P2S: East Undisturbed & Entrance Roads Runoff = 17.26 cfs @ 12.22 hrs, Volume= 1.572 af, Depth> 3.07" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Area (sf) CN Description 239,368 70 Woods, Good, HSG C 28,647 98 Paved roads w /curbs & sewers, HSG C 268,015 73 Weighted Average 239,368 89.31 % Pervious Area 28,647 10.69% Impervious Area Tic Length Slope min) (feet) (fult) 27.7 200 0.2000 F 4, 0 LL Capacity Description 0.12 Sheet Flow, Woods: Dense underbrush n= 0.800 P2= 2.80" Subcatchment P2S: East Undisturbed & Entrance Roads Hydrograph Type -H 24 -hr - _ I I I 100 =Yr .. 24- HrRainfall= 6.00 "___II__ 1 I -Ru Hoff- Area = 268;111115- sf I Runoff I - V- bIurn6 =1 .57I 2_ f - T - I -- - - -,' I - - Runoff Depth >3.07 -I I I I I I I I I I Flow th=2 _ L -Slope -,03000-' I 1/' - - ...... 11-4 7 m - in -I I I 1 1 -CNT73 - -' - -= 1 1 1 1 1 1 1 I 1 I 1 1 1 I 1 I 1 I - -, � - - I i- l� I 1 1 I I I I 1 I I I 1 I I I I I I I 1 1 1 I I I I 1 I 1 --------------------------- I 1 1 I I I I I I I 1 I 1 1 I I I I I I I I ---------------- - - - - -- ---- - - - - -- 1 - - -- -- -- -- -- -- � 1 1 --------------------------- � I I 1 I 1 I I I I- I -- 1 1 I - - - - - -- - - - - - -- I I I - - - - - -- -- - -- I 1 1 I I I 1 I 1 I 1 I 8 9 10 11 12 13 Time (hours) UP - Chan HydroCAD Type// 24 -hr 100 -Yr, 24- Hr Rainfali= 6.00" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Pape 25 Summary for Subcatchment P3S: North; Developed Runoff = 30.95 cfs @ 12.01 hrs, Volume= 1.994 af, Depth> 5.75" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Area (sf) CN Description 3,154 74 >75% Grass cover, Good, HSG C 178,032 98 Roofs HSG C 181,186 98 Weighted Average 3,154 1.74% Pervious Area 178,032 98.26% Impervious Area Tc Length Slope Velocity Capacity Description 10.0 LL 0 1 Direct Entry, Subcatchment P3S: North; Developed I 1 1 1 I I I I 30.,I I I _R_irif_a�l_=- __;•_ -_ -II -F -F -1 -I Y -Ru�ioO Aria - 1$-1;1$6 -p I I Runoff VojurnI e =j- .99I 416 I I I I 1 1 1 I 1 I 1 1 I I 1 1 I 1 I I i5 ills i I I 1 I I I I I I I I I I I I I I I I 1 I 1 I I I 1 1 I 1 1 1 1 I I I I I I I I I I I I I I I I I I I _I I I I I I I I 1 I 1 I I I I I I I I I I I I I 1 I I I I 1 1 I 1 1 1 I 1 I I I I I I I 1 I I I I I I I I 1 11 12 13 Time (hours) ■ Runoff UP - Chan HydroCAD Type 1124 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 © 2011 HvdroCAD Software Solutions LLC Page 26 Summary for Subcatchment P4S: South; Developed Runoff = 26.24 cfs @ 12.01 hrs, Volume= 1.640 af, Depth> 5.52" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Area (sf) CN Description 11,543 74 >75% Grass cover, Good, HSG C 143,835 98 Roofs, HSG C 155,378 96 Weighted Average 11,543 7.43% Pervious Area 143,835 92.57% Impervious Area Tc Length 10.0 3 0 LL Description Direct Entry, Subcatchment P4S: South; Developed Hydrograph 1 1 _1___I__- __i__r_ L __r__r__1_ -__ 26 24 _L _I _I L L I I I I I 100 -Yr- --------------- 1 24 =Hr'f hifall =6b0"- -- ; I I I 1 P,unof f AreaiO 3 8 �f� 11�unoff vojume1 ;1-646,6 - Runoff Depth >6.52'' - -- T• TcW 1 01 rrrin''I - - -, -; -,- CN =9116 I I I I 1 I I I I I I I 11 I I I I I I I I __ T _f _F _I _I I I I I I I I I I I I I 1 I I 1 1 1 1 1 1 I I -4 -♦ -f -h I -1 --f -4 -i -Y -F I 1 I 1 1 1 1 1 1 I I I 1 I 1 1 1 1 1 1 1 I 1 I 1 I I I I 1 I 1 I I I I I I I I I I I I I I I 1 1 I 1 1 1 1- 1 1 1 1 1 1 1 1 I 1 1 1 I 1 1 1 1 I 1 1 I I 1 I 1 1 I 1 1 1 1 I I I I I 1 I I 1 I I I 1 - - - -! -- T-- 1--- 1 - - -1 -- I - - -- - -I - -I -- I 1 1 1 1 1 1 1 I I I I I I I I I I I I I 1 I I I I I I I 1 I I I I I 1 I I I I I I i 1 I I I I i I I I I I I I I 1 I 11 12 13 14 15 16 17 18 19 20 Time (hours) UP - Chan HydroCAD Prepared by EVS, Inc. Type 11 24 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Printed 9/14/2013 Summary for Reach P1 R: Inflow Area = 16.940 ac, 47.50% Impervious, Inflow Depth > 4.10" for 100 -Yr, 24 -Hr event Inflow = 37.45 cfs @ 12.24 hrs, Volume= 5.783 of Outflow = 37.45 cfs @ 12.24 hrs, Volume= 5.783 af, Atten= 0 %, Lag= 0.0 min Routing by Stor- Ind +Trans method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs N i O LL Reach P1 R: Hydrograph I I I I I I I I 43T-� 1 I 1 I I I 1 I 1 ' I I L I I I I I 1 1 1 1 , � I 1 / 1 I - -I Y -Y -I -I Y -i -Y -I ' , 1 I I I I I I I I / / I _I__ / I 1 I I I I I I 1 1 I , I I 1 I I I I I 1 I / I I I I I I I I I � , I 1 1 1 J 1 I I I I I I 1 I I 1 1 I 1 I I I I I 1 I 1 I I _L__I__J__ j __I___I__J __ L__ L_ -I -- 1 I 1 1 I 1 I I 1 1 I I I I I I I I I I I 1 1 _r__i_- __�__r__r__I__r__r__r__r _. 1 1 I I I 1 1 I I 1 I I I I 1 I I I I I I I I I r-- r- 1-- 7-- 1 -- r-- 1-- r- T-- r - -I -.. 1 I 1 I I I I I I I I I I I I I I I I I I 1 1 1 I Time (hours) li Inflow p Outflow UP - Chan HydroCAD Type 11 24 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Page 28 Summary for Pond P3P: Northeast Vault Inflow Area = 4.159 ac, 98.26% Impervious, Inflow Depth > 5.75" for 100 -Yr, 24 -Hr event Inflow = 30.95 cfs @ 12.01 hrs, Volume= 1.994 of Outflow = 8.26 cfs @ 12.21 hrs, Volume= 1.913 A Atten= 73 %, Lag= 12.4 min Primary = 8.26 cfs @ 12.21 hrs, Volume= 1.913 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Peak Elev= 933.84' @ 12.21 hrs Surf.Area= 8,232 sf Storage= 37,443 cf Plug -Flow detention time= 143.5 min calculated for 1.913 of (96% of inflow) Center -of -Mass det. time= 118.3 min ( 862.0 - 743.7 ) Volume Invert Avail.Storage Storage Description #1 929.00' 38,690 cf Custom Stage Data (Prismatic)Listed below (Recalc) 41,160 cf Overall x 94.0% Voids Elevation Surf Area Inc.Store Cum.Store (feet) (sq -ft) (cubic -feet) (cubic -feet) 929.00 8,232 0 0 934.00 8,232 41,160 41,160 Device Routing Invert Outlet Devices #1 Primary 926.45' 15.0" Round Culvert L= 175.0' RCP, groove end projecting, Ke= 0.200 Inlet /Outlet Invert= 926.45'/915.50' S= 0.0626 T Cc= 0.900 n=0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 929.00' 6.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 931.40' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 4.00 Width (feet) 0.50 0.50 Primary OutFlow Max =8.23 cfs @ 12.21 hrs HW= 933.83' (Free Discharge) Culvert (Passes 8.23 cfs of 18.82 cfs potential flow) 2= Orifice /Grate (Orifice Controls 2.02 cfs @ 10.31 fps) 3= Custom Weir /Orifice (Weir Controls 6.21 cfs @ 5.11 fps) UP - Chan HydroCAD Type 1124 -hr 100 -Yr, 24- Hr Rainfall= 6.00" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 © 2011 HydroCAD Software Solutions LLC Page 29 Pond P3P: Northeast Vault Hydrograph . 30.95 32 ll,nfloW Area =k 59_ a l 30 28 - Pe,a1 -I4v -= 933:8; " =_ 26 Storagje�37 ,- '3_I__ 44` -+cf'I JI 24 , I I 22 20 18 1 1 1 1 16 I I I I 1 I I I I I I 14 1 I 1 __ L__I__ 12 1 1 1 i __I__ I__ I_ _I __I __I__ 1__I __I_ 10 I I 1 1 1 I I I I 826 cff I_ a 1 1 I I 1 1 I 1 1 1 Time (hours) ® Inflow - -r - -r - -1 1 IJ I I I 1 I 1 1 I 1 1 13 Primary 1 1 1 1 1 1 1 1 1 1 I I 1 1 I 1 1 1 I 1 1 I 1 1 1 1 I 1 I 1 I I I 1 I I I I I I 1 I I I I I I I I I I I I I I 1 I I I I I I I 1 I I I I I I I I 1 1 1 1 1 1 1 1 1 _ r__I _y _} I I I I I I I I I I I I I L__L_I__1__L__L_J___ I 1 I I I I I 1 I I I 1 I 1 I I I I I I 1 1 1 1 I 1 I 1 1 I 1 1 I ------------------------------- I I L 1 1 I I I 1 1 I r7__ r__r -_1_1 I 1 _ _y__7.__r__I-- .�__1__-- _r__I__ 1 1 1 1 Time (hours) UP - Chan HydroCAD Type// 24 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Prepared by EVS, Inc. Printed 9/14/2013 HydroCAD® 10.00 s/n 01636 @ 2011 HydroCAD Software Solutions LLC Page 30 Summary for Pond P4P: South Vault Inflow Area = 3.567 ac, 92.57% Impervious, Inflow Depth > 5.52" for 100 -Yr, 24 -Hr event Inflow = 26.24 cfs @ 12.01 hrs, Volume= 1.640 of Outflow = 7.76 cfs @ 12.20 hrs, Volume= 1.590 af, Atten= 70 %, Lag= 11.6 min Primary = 7.76 cfs @ 12.20 hrs, Volume= 1.590 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.05 hrs Peak Elev= 936.62' @ 12.20 hrs Surf.Area= 6,860 sf Storage= 29,780 cf Plug -Flow detention time= 120.2 min calculated for 1.590 of (97% of inflow) Center -of -Mass det. time= 101.0 min ( 858.0 - 757.0 ) Volume Invert Avail.Storage Storage Description #1 932.00' 32,242 cf Custom Stage Data (Prismatic)Listed below (Recalc) 34,300 cf Overall x 94.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (sq -ft) (cubic -feet) (cubic -feet) 932.00 6,860 0 0 937.00 6,860 34,300 34,300 Device Routing Invert Outlet Devices #1 Primary 931.85' 15.0" Round Culvert L= 355.0' RCP, groove end projecting, Ke= 0.200 Inlet / Outlet Invert= 931.85' / 902.25' S= 0.0834 T Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 932.00' 6.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 934.30' Custom Weir /Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 4.00 Width (feet) 0.50 0.50 Primary OutFlow Max =7.75 cfs @ 12.20 hrs HW= 936.62' (Free Discharge) Culvert (Passes 7.75 cfs of 15.03 cfs potential flow) 2= Orifice /Grate (Orifice Controls 1.98 cfs @ 10.06 fps) 3= Custom Weir /Orifice (Weir Controls 5.78 cfs @ 4.99 fps) UP - Chan HydroCAD Prepared by EVS, Inc. y 1 O 1 LL 1 Type 1124 -hr 100 -Yr, 24 -Hr Rainfall= 6.00" Printed 9/14/2013 Pond P4P: South Vault 26.24 Itltto'- W-Are. u -' ,;rJ$74 tbC�e29,80 -!C.- , I I 1 1 1 I I I I I I I I f I 1 I I I I , I 1 , 1 I I 1 I I I 1 1 1 I I I I I I I I I I I I I I I I I I I I 1 7.76 c1 1 i I I I 1 1 I 1 I 1 I 1 I I 1 1 1 , I I I 1 1 � I I 1 I I I I I 1 I J 1 1 1 1 1 I I I I I 1 I I 1 1 I 1 I 1 I I I 1 I I 1 1 I 1 1 I 1 I I I I I 1 1 1 1 _ L_- 1__J__1__L- _I__J__1__L__L__I__ 1 I I I I I 1 I I I I 1 I I I I I 1 I 1 I 1 L__ I__J__1__L-- I__J__1__L__L__I__. I I I I I I I I 1 I 1 1 1 I 1 1 1 1 1 1 1 1 1__L_ I I I I I I I I I I I I 1 I I I 1 I I I 1 I 1 I I I I 1 1 1 1 1 1 1 1 I 1 I 1 1 I I I 1 I I 1 I 1 I I 1 I 1 I J I 1 I 1 I I I 11 12 13 14 15 16 17 18 19 20 21 Time (hours) ® InBow O Primary United Properties Powers Place 9/15/13 APPENDIX E WATER QUALITY CALCS (P8) Storm Water Narrative Page 1 10 EVS 110250 Valley View Rd., Suite 123 1 Eden Prairie, MN 55344 -3534 1 Phone: 952.646.0236 1 Fax: 952.646.0290 I www.evs- enq.com p8- inputs.txt "P8 urban Catchment Model, version 3.4 Run Date 09/13/13 Case Chanhassen_Powers.p8c FirstDate 06/10/70 Precip(in) 535.9 Title Powers Proposed LastDate 12/31/88 Rain(in) 453.56 PrecFile msp_4989.pcp Events 1321 snow(in) 82.35 Part File nurp50.p8p TotalHrs 162490 TotalYrs 18.54 Case Title case Data File Path Properties \Drainage \P8\ Case Notes: inch per day out of the vault assumes street runoff will be Storm Data File Particle File Air Temp File File Time Steps Per Hour Minimum Inter -Event Time (hrs) Maximum Continuity Error % Rainfall Breakpoint (inches) Precipitation scale Factor Air Temp offset (deg -F) LOOPS Thru storm File Simulation Dates Start Keep Stop Powers Proposed chanhassen_Powers.p8c H: \2013 \2013 -057.1 Chanhassen Site - United Powers Place of infiltration indirectly msp_4989.pcp nurp50.p8p msp_4889.tmp 4 10 2 0.8 1 0 1 6/1/1970 6/1/1970 12/31/1988 max snowfall Temperature (deg -f) 32.0 note the vault does not infiltrate, however 0.50 (removal) is assumed for irrigation purposes. P2S snowMelt Temperature (deg -f) 32.0 snowmelt coef (in /degF -Day) 0.06 Soil Freeze Temp (deg -F) 32.0 Snowmelt Abstraction Factor 1.00 Evapo- Trans. calibration Factor 1.00 Growing Season Start Month 5 Growing Season End Month 10 5 -Day Antecedent Rainfall + Runoff (inches) CN Antecedent Moisture condition AMC -II AMC -III Growing Season 1.40 2.10 NonGrowing Season 0.50 1.10 Watershed Data Watershed Name P3S P2S P4S Runoff to Device P5P Sm_RG P5P Infiltration to Device Watershed Area 4.15 6.15 3.57 SCS Curve Number (Pervious) 70 70 70 Scale Factor for Pervious Runoff 1 1 1 Indirectly connected Impery Frac 0 0.11 0 Unswept Impervious Fraction 0.98 0 0.93 Unswept Depression storage (inch 0.02 0.02 0.02 UnSwept Imperv. Runoff Coefficie 0.9 0.9 0.9 UnSwept Scale Factor for Particl 1 1 1 Swept Impervious Fraction 0 0 0 Swept Depression Storage (inches 0.02 0.02 0.02 Swept Imperv. Runoff coefficient 1 1 1 Swept scale Factor for Particle 1 1 1 Sweeping Frequency 0 0 0.5 sweeping Efficiency 1 1 1 Sweeping Start Date (MMDD) 101 101 101 Sweeping Stop Date (MMDD) 1231 1231 1231 Device Data Device Name P5P Sm_RG Device Type POND INF_BASIN Infiltration outlet Normal outlet Spillway outlet Particle Removal Scale Factor 1 1 Bottom Elevation (ft) 933 895 Bottom Area (acres) 0.36 0.01 Permanent Pool Area (acres) 0.36 Permanent Pool volume (ac -ft) 1.03 Perm Pool Infilt Rate (in /hr) 0.025 Flood Pool Area (acres) 0.36 0.03 Flood Pool volume (ac -ft) 1.72 0.05 Flood Pool Infilt Rate (in /hr) 0.025 0.25 Infilt Basin void Fraction ( %) 100 Detention Pond Outlet Parameters Outlet Type ORIFICE Page 1 Outlet orifice Diameter (in) Orifice Discharge Coef outlet weir Length (ft) Weir Discharge Coef Perforated Riser Height (ft) Number of Holes in Riser Holes Diameter Flood Pool Drain Time (hrs) Swale Parameters Length of Flow Path (ft) Slope of Flow Path % Bottom width (ft) side slope (ft- v /ft -h) maximum Depth of Flow (ft) mannings n Constant Hydraulic model Pipe, splitter, Aquifer Parameter Hydraulic Res. Time (hrs) Particle Data Particle File nurp50.p8p Particle Class PO% Filtration Efficiency 90 Settling Velocity (ft/ 0 First Order Decay Rate 0 2nd order Decay (1 /day 0 Impervious Runoff Conc 1 Pervious Runoff Conc ( 1 Pervious Conc Exponent 0 ACCUm. Rate (lbs -ac -da 0 Particle Removal Rate 0 washoff Coefficient 0 washoff Exponent 0 Sweeper Efficiency 0 Water Quality Component Data Component Name TSS water Quality Criteria (ppm) Level 1 5 Level 2 10 Level 3 20 content scale Factor 1 Particle Composition (mg /kg) PO% 0 P10% 1000000 P30% 1000000 P50% 1000000 P80% 1000000 p8- inputs.txt 11 0.6 P10% P30% P50% P80% 100 100 100 100 0.03 0.3 1.5 15 0 0 0 0 0 0 0 0 0 0 0 0 100 100 100 200 1 1 1 1 1.75 1.75 1.75 3.5 0.25 0.25 0.25 0.25 20 20 20 20 2 2 2 2 0 0 5 15 TP TKN CU PB ZN HC 0.025 2 2 0.02 5 0.1 0.05 1 0.0048 0.014 0.0362 0.5 0.1 0.5 0.02 0.15 0.38 1 1 1 1 1 1 1 99000 600000 13600 2000 640000 250000 3850 15000 340 180 1600 22500 3850 15000 340 180 1600 22500 3850 15000 340 180 1600 22500 0 0 340 180 0 22500 Page 2 p8- outputs.txt "P8 urban Catchment Model, Version 3.4 Flow_cfs Load_lbs Load_lbs /yr Run Date 09/13/13 watershed inflows 327.00 0.02 19435.7 1048.5 21.87 Case Chanhassen_Powers.p8c FirstDate 06/10/70 Precip(in) 535.9 0.34 04 exfiltrate 116.96 0.01 0.0 Title Powers Proposed 05 LastDate 12/31/88 Rain(in) 453.56 5.9 06 normal outlet 181.56 0.01 PrecFile msp_4989.pcp 4.25 Events 1321 snow(in) 82.35 2969.0 160.2 38.00 08 sedimen + decay 0.00 Part File nurp50.p8p 769.2 TotalHrs 09 162490 Totalvrs 18.54 19435.7 1048.5 21.87 10 surface outflow 210.31 Mass Balances by Device and variable 273.4 8.87 11 groundw outflow 116.96 Device: OVERALL Type: NONE 0.00 Variable: PO% total outflow mass Balance Term Flow_acft F1oW_cfs Load_lbs Load_lbs /yr Conc-ppm 13 01 watershed inflows 327.00 0.02 888.8 47.9 1.00 14 03 infiltrate 116.96 0.01 316.6 17.1 1.00 15 04 exfiltrate 116.96 0.01 31.7 1.7 0.10 Reduction ( %) 05 filtered 0.00 0.00 284.9 15.4 Device: OVERALL Type: 06 normal outlet 181.56 0.01 492.5 26.6 1.00 Load_lbs Load_lbs 07 spillway outlet 28.75 0.00 78.1 4.2 1.00 19435.7 09 total inflow 327.00 0.02 888.8 47.9 1.00 26.4 10 surface outflow 210.31 0.02 570.6 30.8 1.00 0.0 11 groundw outflow 116.96 0.01 31.7 1.7 0.10 26.4 12 total outflow 327.27 0.02 602.3 32.5 0.68 872.1 13 total trapped 0.00 0.00 284.9 15.4 0.00 2770.3 14 storage increase -0.27 0.00 1.6 0.1 0.00 15766.9 15 mass balance chec 0.00 0.00 0.0 0.0 0.02 19435.7 Reduction ( %) 0.00 0.00 32.1 32.1 0.02 3642.4 Device: OVERALL Type: NONE groundw outflow Variable: P10% 0.01 Mass Balance Term Flow_acft FloW_cfs Load_lbs Load_lbs /yr Conc-ppm 01 watershed inflows 327.00 0.02 19435.7 1048.5 21.87 03 infiltrate 116.96 0.01 830.8 44.8 2.61 04 exfiltrate 116.96 0.01 0.0 0.0 0.00 05 filtered 0.00 0.00 830.8 44.8 06 normal outlet 181.56 0.01 4069.7 219.5 8.25 07 spillway outlet 28.75 0.00 3058.6 165.0 39.14 08 sedimen + decay 0.00 0.00 11476.6 619.1 09 total inflow 327.00 0.02 19435.7 1048.5 21.87 10 surface outflow 210.31 0.02 7128.3 384.6 12.47 11 groundw outflow 116.96 0.01 0.0 0.0 0.00 12 total outflow 327.27 0.02 7128.3 384.6 8.01 13 total trapped 0.00 0.00 12307.4 664.0 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 63.3 63.3 Device: OVERALL Type: NONE variable: P30% Mass Balance Term FIOW_aCft Flow_cfs Load_lbs Load_lbs /yr Conc-ppm 01 watershed inflows 327.00 0.02 19435.7 1048.5 21.87 03 infiltrate 116.96 0.01 109.2 5.9 0.34 04 exfiltrate 116.96 0.01 0.0 0.0 0.00 05 filtered 0.00 0.00 109.2 5.9 06 normal outlet 181.56 0.01 2099.7 113.3 4.25 07 spillway outlet 28.75 0.00 2969.0 160.2 38.00 08 sedimen + decay 0.00 0.00 14257.8 769.2 09 total inflow 327.00 0.02 19435.7 1048.5 21.87 10 surface outflow 210.31 0.02 5068.7 273.4 8.87 11 groundw outflow 116.96 0.01 0.0 0.0 0.00 12 total outflow 327.27 0.02 5068.7 273.4 5.70 13 total trapped 0.00 0.00 14367.0 775.1 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 73.9 73.9 Device: OVERALL Type: NONE Variable: P50% Mass Balance Term F1OW_acft F1oW_Cfs Load_lbs Load_lbs /yr Conc-ppm 01 watershed inflows 327.00 0.02 19435.7 1048.5 21.87 03 infiltrate 116.96 0.01 26.4 1.4 0.08 04 exfiltrate 116.96 0.01 0.0 0.0 0.00 05 filtered 0.00 0.00 26.4 1.4 06 normal outlet 181.56 0.01 872.1 47.0 1.77 07 spillway outlet 28.75 0.00 2770.3 149.5 35.45 08 sedimen + decay 0.00 0.00 15766.9 850.6 09 total inflow 327.00 0.02 19435.7 1048.5 21.87 10 surface outflow 210.31 0.02 3642.4 196.5 6.37 11 groundw outflow 116.96 0.01 0.0 0.0 0.00 Page 1 Device: OVERALL Type: NONE Variable: Cu Page 2 p8- outputs.txt 12 total outflow 327.27 0.02 3642.4 196.5 4.09 13 total trapped 0.00 0.00 15793.3 852.0 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction (%) 0.00 0.00 81.3 81.3 Device: OVERALL Type: NONE Variable: P80% mass Balance Term FloW_acft FIOW_Cf5 Load_lbs Load_lbs /yr ConC_ppm 01 watershed inflows 327.00 0.02 38871.4 2097.0 43.74 03 infiltrate 116.96 0.01 8.0 0.4 0.03 04 exfiltrate 116.96 0.01 0.0 0.0 0.00 05 filtered 0.00 0.00 8.0 0.4 06 normal outlet 181.56 0.01 140.9 7.6 0.29 07 spillway outlet 28.75 0.00 3740.4 201.8 47.87 08 sedimen + decay 0.00 0.00 34982.2 1887.2 09 total inflow 327.00 0.02 38871.4 2097.0 43.74 10 surface outflow 210.31 0.02 3881.3 209.4 6.79 11 groundw outflow 116.96 0.01 0.0 0.0 0.00 12 total outflow 327.27 0.02 3881.3 209.4 4.36 13 total trapped 0.00 0.00 34990.2 1887.6 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 90.0 90.0 Device: OVERALL Type: NONE Variable: TSS mass Balance Term F1OW_aCft F1OW_Cfs Load_lbs Load_lbs /yr Conr_ppm 01 watershed inflows 327.00 0.02 97178.6 5242.6 109.34 03 infiltrate 116.96 0.01 974.4 52.6 3.07 04 exfiltrate 116.96 0.01 0.0 0.0 0.00 05 filtered 0.00 0.00 974.4 52.6 06 normal outlet 181.56 0.01 7182.3 387.5 14.55 07 spillway outlet 28.75 0.00 12538.3 676.4 160.46 08 sedimen + decay 0.00 0.00 76483.5 4126.1 09 total inflow 327.00 0.02 97178.6 5242.6 109.34 10 surface outflow 210.31 0.02 19720.7 1063.9 34.50 11 groundw outflow 116.96 0.01 0.0 0.0 0.00 12 total outflow 327.27 0.02 19720.7 1063.9 22.17 13 total trapped 0.00 0.00 77457.9 4178.7 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 79.7 79.7 Device: OVERALL Type: NONE Variable: TP mass Balance Term Flow_acft FIOW_cfs Load-1b5 Load_lbs /yr COnc_ppm 01 watershed inflows 327.00 0.02 312.5 16.9 0.35 03 infiltrate 116.96 0.01 35.1 1.9 0.11 04 exfiltrate 116.96 0.01 3.1 0.2 0.01 05 filtered 0.00 0.00 31.9 1.7 06 normal outlet 181.56 0.01 75.9 4.1 0.15 07 spillway outlet 28.75 0.00 41.6 2.2 0.53 08 sedimen + decay 0.00 0.00 159.8 8.6 09 total inflow 327.00 0.02 312.5 16.9 0.35 10 surface outflow 210.31 0.02 117.5 6.3 0.21 11 groundw outflow 116.96 0.01 3.1 0.2 0.01 12 total outflow 327.27 0.02 120.6 6.5 0.14 13 total trapped 0.00 0.00 191.7 10.3 14 storage increase -0.27 0.00 0.2 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 61.4 61.4 Device: OVERALL Type: NONE Variable: TKN mass Balance Term Flow_acft FIOw_Cfs Load_lbs Load_lbs /yr Conc_ppm 01 watershed inflows 327.00 0.02 1407.9 76.0 1.S8 03 infiltrate 116.96 0.01 204.4 11.0 0.64 04 exfiltrate 116.96 0.01 19.0 1.0 0.06 05 filtered 0.00 0.00 185.5 10.0 06 normal outlet 181.56 0.01 401.1 21.6 0.81 07 spillway outlet 28.75 0.00 178.9 9.6 2.29 08 sedimen + decay 0.00 0.00 622.5 33.6 09 total inflow 327.00 0.02 1407.9 76.0 1.58 10 surface outflow 210.31 0.02 580.0 31.3 1.01 11 groundw outflow 116.96 0.01 19.0 1.0 0.06 12 total outflow 327.27 0.02 598.9 32.3 0.67 13 total trapped 0.00 0.00 808.0 43.6 14 storage increase -0.27 0.00 1.0 0.1 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 57.4 57.4 Device: OVERALL Type: NONE Variable: Cu Page 2 p8- outputs.txt Mass Balance Term Flow_acft Flow_Cfs Load_lbs Load_lbs /yr Cont_ppm 01 watershed inflows 327.00 0.02 45.1 2.4 0.05 03 infiltrate 116.96 0.01 4.6 0.3 0.01 04 exfiltrate 116.96 0.01 0.4 0.0 0.00 05 filtered 0.00 0.00 4.2 0.2 06 normal outlet 181.56 0.01 9.1 0.5 0.02 07 spillway outlet 28.75 0.00 5.3 0.3 0.07 08 sedimen + decay 0.00 0.00 26.0 1.4 09 total inflow 327.00 0.02 45.1 2.4 0.05 10 surface outflow 210.31 0.02 14.5 0.8 0.03 11 groundw outflow 116.96 0.01 0.4 0.0 0.00 12 total outflow 327.27 0.02 14.9 0.8 0.02 13 total trapped 0.00 0.00 30.2 1.6 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 66.9 66.9 Device: OVERALL Type: NONE Variable: PB Mass Balance Term F1oW_aCft FloW_cfs Load_lbs Load_lbs /yr Conc_ppm 01 watershed inflows 327.00 0.02 19.3 1.0 0.02 03 infiltrate 116.96 0.01 0.8 0.0 0.00 04 exfiltrate 116.96 0.01 0.1 0.0 0.00 05 filtered 0.00 0.00 0.7 0.0 06 normal outlet 181.56 0.01 2.3 0.1 0.00 07 spillway outlet 28.75 0.00 2.4 0.1 0.03 08 sedimen + decay 0.00 0.00 13.8 0.7 09 total inflow 327.00 0.02 19.3 1.0 0.02 10 surface outflow 210.31 0.02 4.7 0.3 0.01 11 groundw outflow 116.96 0.01 0.1 0.0 0.00 12 total outflow 327.27 0.02 4.8 0.3 0.01 13 total trapped 0.00 0.00 14.5 0.8 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0100 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 75.3 75.3 Device: OVERALL Type: NONE Variable: ZN Mass Balance Term Flow_aCft FlOW_Cfs Load_lbs Load_lbs /yr Contppm 01 watershed inflows 327.00 0.02 662.1 35.7 0.74 03 infiltrate 116.96 0.01 204.2 11.0 0.64 04 exfiltrate 116.96 0.01 20.3 1.1 0.06 05 filtered 0.00 0.00 183.9 9.9 06 normal outlet 181.56 0.01 326.4 17.6 0.66 07 spillway outlet 28.75 0.00 64.1 3.5 0.82 08 sedimen + decay 0.00 0.00 66.4 3.6 09 total inflow 327.00 0.02 662.1 35.7 0.74 10 surface outflow 210.31 0.02 390.5 21.1 0.68 11 groundw outflow 116.96 0.01 20.3 1.1 0.06 12 total outflow 327.27 0.02 410.8 22.2 0.46 13 total trapped 0.00 0.00 250.3 13.5 14 storage increase -0.27 0.00 1.0 0.1 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 37.8 37.8 Device: OVERALL Type: NONE Variable: HC Mass Balance Term Flow_acft Flow_cfs Load_lbs Load_lbs /yr Contppm 01 watershed inflows 327.00 0.02 2408.7 129.9 2.71 03 infiltrate 116.96 0.01 101.1 5.5 0.32 04 exfiltrate 116.96 0.01 7.9 0.4 0.02 05 filtered 0.00 0.00 93.2 S.0 06 normal outlet 181.56 0.01 284.7 15.4 O.S8 07 spillway outlet 28.75 0.00 301.6 16.3 3.86 08 sedimen + decay 0.00 0.00 1720.9 92.8 09 total inflow 327.00 0.02 2408.7 129.9 2.71 10 surface outflow 210.31 0.02 586.4 31.6 1.03 11 groundw outflow 116.96 0.01 7.9 0.4 0.02 12 total outflow 327.27 0.02 594.3 32.1 0.67 13 total trapped 0.00 0.00 1814.0 97.9 14 storage increase -0.27 0.00 0.4 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 7S.3 75.3 Device: PSP Type: POND Variable: PO% Mass Balance Term F1oW_acft Flow_Cfs Load_lbs Load_lbs /yr Conc-ppm 01 watershed inflows 293.69 0.02 798.2 43.1 1.00 03 infiltrate 109.78 0.01 297.1 16.0 1.00 04 exfiltrate 109.78 0.01 29.7 1.6 0.10 05 filtered 0.00 0.00 267.4 14.4 06 normal outlet 181.56 0.01 492.5 26.6 1.00 Page 3 p8- outputs.txt 07 spillway outlet 2.61 0.00 7.1 0.4 1.00 09 total inflow 293.69 0.02 798.2 43.1 1.00 10 surface outflow 184.18 0.01 499.6 27.0 1.00 11 groundw outflow 109.78 0.01 29.7 1.6 0.10 12 total outflow 293.96 0.02 529.3 28.6 0.66 13 total trapped 0.00 0.00 267.4 14.4 14 storage increase -0.27 0.00 1.6 0.1 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 33.5 33.5 Device: P5P Type: POND variable: P10% Mass Balance Term Flow_acft Flow_cfs Load_lbs Load_lbs /yr Conc-ppm 01 watershed inflows 293.69 0.02 16332.7 881.1 20.46 03 infiltrate 109.78 0.01 793.2 42.8 2.66 04 exfiltrate 109.78 0.01 0.0 0.0 0.00 05 filtered 0.00 0.00 793.2 42.8 06 normal outlet 181.56 0.01 4069.7 219.5 8.25 07 spillway outlet 2.61 0.00 47.2 2.5 6.64 08 sedimen + decay 0.00 0.00 11422.6 616.2 09 total inflow 293.69 0.02 16332.7 881.1 20.46 10 surface outflow 184.18 0.01 4116.9 222.1 8.22 11 groundw outflow 109.78 0.01 0.0 0.0 0.00 12 total outflow 293.96 0.02 4116.9 222.1 5.15 13 total trapped 0.00 0.00 12215.8 659.0 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 74.8 74.8 Device: P5P Type: POND variable: P30% Mass Balance Term Flow_acft Flow_Cfs Load_lbs Load_lbs /yr Conc-ppm 01 watershed inflows 293.69 0.02 16332.7 881.1 20.46 03 infiltrate 109.78 0.01 97.9 5.3 0.33 04 exfiltrate 109.78 0.01 0.0 0.0 0.00 05 filtered 0.00 0.00 97.9 5.3 06 normal outlet 181.56 0.01 2099.7 113.3 4.25 07 spillway outlet 2.61 0.00 41.0 2.2 5.77 08 sedimen + decay 0.00 0.00 14094.1 760.3 09 total inflow 293.69 0.02 16332.7 881.1 20.46 10 surface outflow 184.18 0.01 2140.7 115.5 4.28 11 groundw outflow 109.78 0.01 0.0 0.0 0.00 12 total outflow 293.96 0.02 2140.7 115.5 2.68 13 total trapped 0.00 0.00 14192.0 765.6 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 86.9 86.9 Device: P5P Type: POND variable: P50% mass Balance Term Flow_acft Flow_cfs Load_lb5 Load_lbs /yr Conc-ppm 01 watershed inflows 293.69 0.02 16332.7 881.1 20.46 03 infiltrate 109.78 0.01 21.4 1.2 0.07 04 exfiltrate 109.78 0.01 0.0 0.0 0.00 05 filtered 0.00 0.00 21.4 1.2 06 normal outlet 181.56 0.01 872.1 47.0 1.77 07 spillway outlet 2.61 0.00 33.3 1.8 4.68 08 sedimen + decay 0.00 0.00 15405.9 831.1 09 total inflow 293.69 0.02 16332.7 881.1 20.46 10 surface outflow 184.18 0.01 905.4 48.8 1.81 11 groundw outflow 109.78 0.01 0.0 0.0 0.00 12 total outflow 293.96 0.02 905.4 48.8 1.13 13 total trapped 0.00 0.00 15427.3 832.3 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 94.5 94.5 Device: P5P Type: POND variable: P80% Mass Balance Term Flow_acft Flow_cfs Load_lbs Load_lbs /yr Conc-ppm 01 watershed inflows 293.69 0.02 32665.4 1762.2 40.92 03 infiltrate 109.78 0.01 4.5 0.2 0.02 04 exfiltrate 109.78 0.01 0.0 0.0 0.00 05 filtered 0.00 0.00 4.5 0.2 06 normal outlet 181.56 0.01 140.9 7.6 0.29 07 spillway outlet 2.61 0.00 23.2 1.3 3.27 08 sedimen + decay 0.00 0.00 32496.8 1753.1 09 total inflow 293.69 0.02 32665.4 1762.2 40.92 10 surface outflow 184.18 0.01 164.1 8.9 0.33 it groundw outflow 109.78 0.01 0.0 0.0 0.00 12 total outflow 293.96 0.02 164.1 8.9 0.21 13 total trapped 0.00 0.00 32501.3 1753.4 14 storage increase -0.27 0.00 0.0 0.0 Page 4 p8- outputs.txt 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 99.5 99.5 Device: P5P Type: POND Variable: T55 Mass Balance Term Flow_acft Flow_cfs Load_lbs Load_lbs /yr conc-ppm 01 watershed inflows 293.69 0.02 81663.5 4405.6 102.30 03 infiltrate 109.78 0.01 917.0 49.5 3.07 04 exfiltrate 109.78 0.01 0.0 0.0 0.00 05 filtered 0.00 0.00 917.0 49.5 06 normal outlet 181.56 0.01 7182.3 387.5 14.55 07 spillway outlet 2.61 0.00 144.7 7.8 20.36 08 sedimen + decay 0.00 0.00 73419.4 3960.8 09 total inflow 293.69 0.02 81663.5 4405.6 102.30 10 surface outflow 184.18 0.01 7327.0 395.3 14.64 11 groundw outflow 109.78 0.01 0.0 0.0 0.00 12 total outflow 293.96 0.02 7327.0 395.3 9.17 13 total trapped 0.00 0.00 74336.4 4010.3 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 91.0 91.0 Device: P5P Type: POND Variable: TP Mass Balance Term Flow_acft Flow_Cfs Load_lbs LOad_lbs /yr COnc_ppm 01 watershed inflows 293.69 0.02 267.7 14.4 0.34 03 infiltrate 109.78 0.01 32.9 1.8 0.11 04 exfiltrate 109.78 0.01 2.9 0.2 0.01 05 filtered 0.00 0.00 30.0 1.6 06 normal outlet 181.56 0.01 75.9 4.1 0.15 07 spillway outlet 2.61 0.00 1.2 0.1 0.16 08 sedimen + decay 0.00 0.00 157.6 8.5 09 total inflow 293.69 0.02 267.7 14.4 0.34 10 surface outflow 184.18 0.01 77.0 4.2 0.15 11 groundw outflow 109.78 0.01 2.9 0.2 0.01 12 total outflow 293.96 0.02 80.0 4.3 0.10 13 total trapped 0.00 0.00 187.5 10.1 14 storage increase -0.27 0.00 0.2 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 70.1 70.1 Device: P5P Type: POND Variable: TKN Mass Balance Term Flow_acft Flow_cfs LOad_lbs Load_lbs /yr conc_ppm 01 watershed inflows 293.69 0.02 1213.9 65.5 1.52 03 infiltrate 109.78 0.01 191.9 10.4 0.64 04 exfiltrate 109.78 0.01 17.8 1.0 0.06 05 filtered 0.00 0.00 174.1 9.4 06 normal outlet 181.56 0.01 401.1 21.6 0.81 07 spillway outlet 2.61 0.00 6.1 0.3 0.86 08 sedimen + decay 0.00 0.00 613.8 33.1 09 total inflow 293.69 0.02 1213.9 65.5 1.52 10 surface outflow 184.18 0.01 407.2 22.0 0.81 11 groundw outflow 109.78 0.01 17.8 1.0 0.06 12 total outflow 293.96 0.02 425.0 22.9 0.53 13 total trapped 0.00 0.00 788.0 42.5 14 storage increase -0.27 0.00 1.0 0.1 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 64.9 64.9 Device: P5P Type: POND Variable: CU Mass Balance Term Flow_acft Flow_cfs Load_lbs Load_lbs /yr Conc -ppm 01 watershed inflows 293.69 0.02 38.6 2.1 OAS 03 infiltrate 109.78 0.01 4.4 0.2 0.01 04 exfiltrate 109.78 0.01 0.4 0.0 0.00 OS filtered 0.00 0.00 3.9 0.2 06 normal outlet 181.56 0.01 9.1 0.5 0.02 07 spillway outlet 2.61 0.00 0.1 0.0 0.02 08 sedimen + decay 0.00 0.00 25.0 1.3 09 total inflow 293.69 0.02 38.6 2.1 0.05 10 surface outflow 184.18 0.01 9.3 0.5 0.02 11 groundw outflow 109.78 0.01 0.4 0.0 0.00 12 total outflow 293.96 0.02 9.7 0.5 0.01 13 total trapped 0.00 0.00 28.9 1.6 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 74.9 74.9 Device: P5P Type: POND Variable: PB Mass Balance Term Flow_acft Flow_Cfs Load_lbs Load_lbs /yr Conc_ppm 01 watershed inflows 293.69 0.02 16.3 0.9 0.02 Page 5 p8- outputs.txt 03 infiltrate 109.78 0.01 0.8 0.0 0.00 04 exfiltrate 109.78 0.01 0.1 0.0 0.00 05 filtered 0.00 0.00 0.7 0.0 06 normal outlet 181.56 0.01 2.3 0.1 0.00 07 spillway outlet 2.61 0.00 0.0 0.0 0.01 08 sedimen + decay 0.00 0.00 13.2 0.7 09 total inflow 293.69 0.02 16.3 0.9 0.02 10 surface outflow 184.18 0.01 2.3 0.1 0.00 11 groundw outflow 109.78 0.01 0.1 0.0 0.00 12 total outflow 293.96 0.02 2.4 0.1 0.00 13 total trapped 0.00 0.00 13.9 0.8 14 storage increase -0.27 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 85.4 85.4 Device: P5P Type: POND variable: ZN Mass Balance Term Flow_aCft FlOW_cf5 Load-1b5 Load_lbs /yr ConC_ppm 01 watershed inflows 293.69 0.02 589.3 31.8 0.74 03 infiltrate 109.78 0.01 191.6 10.3 0.64 04 exfiltrate 109.78 0.01 19.0 1.0 0.06 05 filtered 0.00 0.00 172.6 9.3 06 normal outlet 181.56 0.01 326.4 17.6 0.66 07 spillway outlet 2.61 0.00 4.7 0.3 0.67 08 sedimen + decay 0.00 0.00 65.5 3.5 09 total inflow 293.69 0.02 589.3 31.8 0.74 10 surface outflow 184.18 0.01 331.2 17.9 0.66 11 groundw outflow 109.78 0.01 19.0 1.0 0.06 12 total outflow 293.96 0.02 350.2 18.9 0.44 13 total trapped 0.00 0.00 238.1 12.8 14 storage increase -0.27 0.00 1.0 0.1 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 40.4 40.4 Device: P5P Type: POND variable: HC Mass Balance Term Flow_acft Flow_cfs Load_lbs Load_lbs /yr Conc-ppm 01 watershed inflows 293.69 0.02 2037.0 109.9 2.55 03 infiltrate 109.78 0.01 94.9 5.1 0.32 04 exfiltrate 109.78 0.01 7.4 0.4 0.02 05 filtered 0.00 0.00 87.5 4.7 06 normal outlet 181.56 0.01 284.7 15.4 0.58 07 spillway outlet 2.61 0.00 5.0 0.3 0.71 08 sedimen + decay 0.00 0.00 1651.9 89.1 09 total inflow 293.69 0.02 2037.0 109.9 2.55 10 surface outflow 184.18 0.01 289.7 15.6 0.58 11 groundw outflow 109.78 0.01 7.4 0.4 0.02 12 total outflow 293.96 0.02 297.2 16.0 0.37 13 total trapped 0.00 0.00 1739.4 93.8 14 storage increase -0.27 0.00 0.4 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 85.4 85.4 Device: sm_RG Type: INF_BASIN variable: PO% Mass Balance Term Flow_acft FIOW_Cfs LOad_Ibs Load_lbs /yr contppm 01 watershed inflows 33.31 0.00 90.5 4.9 1.00 03 infiltrate 7.17 0.00 19.5 1.1 1.00 04 exfiltrate 7.17 0.00 1.9 0.1 0.10 05 filtered 0.00 0.00 17.5 0.9 07 spillway outlet 26.14 0.00 71.0 3.8 1.00 09 total inflow 33.31 0.00 90.5 4.9 1.00 10 surface outflow 26.14 0.00 71.0 3.8 1.00 11 groundw outflow 7.17 0.00 1.9 0.1 0.10 12 total outflow 33.31 0.00 73.0 3.9 0.81 13 total trapped 0.00 0.00 17.5 0.9 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 19.4 19.4 Device: Sm_RG Type: INF -BASIN Variable: P10% Mass Balance Term Flow_acft Flow_cfs Load_lbs Load_lbs /yr Conc_ppm 01 watershed inflows 33.31 0.00 3103.0 167.4 34.27 03 infiltrate 7.17 0.00 37.5 2.0 1.92 04 exfiltrate 7.17 0.00 0.0 0.0 0.00 05 filtered 0.00 0.00 37.5 2.0 07 spillway outlet 26.14 0.00 3011.4 162.5 42.39 08 sedimen + decay 0.00 0.00 54.0 2.9 09 total inflow 33.31 0.00 3103.0 167.4 34.27 10 surface outflow 26.14 0.00 3011.4 162.5 42.39 11 groundw outflow 7.17 0.00 0.0 0.0 0.00 12 total outflow 33.31 0.00 3011.4 162.5 33.26 Page 6 p8- outputs.txt 13 total trapped 0.00 0.00 91.6 4.9 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 3.0 3.0 Device: Sm_RG Type: INF_BASIN Variable: P30% Mass Balance Term Flow_acft FIOW_Cfs Load_lbs Load_lbs /yr Contppm 01 watershed inflows 33.31 0.00 3103.0 167.4 34.27 03 infiltrate 7.17 0.00 11.4 0.6 0.58 04 exfiltrate 7.17 0.00 0.0 0.0 0.00 05 filtered 0.00 0.00 11.4 0.6 07 spillway outlet 26.14 0.00 2928.0 158.0 41.22 08 sedimen + decay 0.00 0.00 163.7 8.8 09 total inflow 33.31 0.00 3103.0 167.4 34.27 10 surface outflow 26.14 0.00 2928.0 158.0 41.22 11 groundw outflow 7.17 0.00 0.0 0.0 0.00 12 total outflow 33.31 0.00 2928.0 158.0 32.34 13 total trapped 0.00 0.00 175.0 9.4 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction (%) 0.00 0.00 5.6 5.6 Device: Sm_RG Type: INF_BASIN variable: P50% Mass Balance Term Flow_acft Flow_Cfs Load_lbs Load_lbs /yr Conc_ppm 01 watershed inflows 33.31 0.00 3103.0 167.4 34.27 03 infiltrate 7.17 0.00 5.0 0.3 0.26 04 exfiltrate 7.17 0.00 0.0 0.0 0.00 05 filtered 0.00 0.00 5.0 0.3 07 spillway outlet 26.14 0.00 2737.1 147.7 38.53 08 sedimen + decay 0.00 0.00 360.9 19.5 09 total inflow 33.31 0.00 3103.0 167.4 34.27 10 surface outflow 26.14 0.00 2737.1 147.7 38.53 11 groundw outflow 7.17 0.00 0.0 0.0 0.00 12 total outflow 33.31 0.00 2737.1 147.7 30.23 13 total trapped 0.00 0.00 366.0 19.7 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 11.8 11.8 Device: Sm_RG Type: INF_BASIN Variable: P80% Mass Balance Term FIOw_acft FIOW_cfs LOad_lb5 Load_lbs /yr COnc_ppm 01 watershed inflows 33.31 0.00 6206.0 334.8 68.55 03 infiltrate 7.17 0.00 3.5 0.2 0.18 04 exfiltrate 7.17 0.00 0.0 0.0 0.00 05 filtered 0.00 0.00 3.5 0.2 07 spillway outlet 26.14 0.00 3717.2 200.5 52.33 08 sedimen + decay 0.00 0.00 2485.4 134.1 09 total inflow 33.31 0.00 6206.0 334.8 68.55 10 surface outflow 26.14 0.00 3717.2 200.5 52.33 11 groundw outflow 7.17 0.00 0.0 0.0 0.00 12 total outflow 33.31 0.00 3717.2 200.5 41.06 13 total trapped 0.00 0.00 2488.9 134.3 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction (%) 0.00 0.00 40.1 40.1 Device: Sm_RG Type: INF_BASIN variable: TSS Mass Balance Term Flow_aCft Flow_cfs Load_lbs Load_lbs /yr Conc-ppm 01 watershed inflows 33.31 0.00 15515.1 837.0 171.37 03 infiltrate 7.17 0.00 57.4 3.1 2.94 04 exfiltrate 7.17 0.00 0.0 0.0 0.00 05 filtered 0.00 0.00 57.4 3.1 07 spillway outlet 26.14 0.00 12393.7 668.6 174.47 08 sedimen + decay 0.00 0.00 3064.1 165.3 09 total inflow 33.31 0.00 15515.1 837.0 171.37 10 surface outflow 26.14 0.00 12393.7 668.6 174.47 11 groundw outflow 7.17 0.00 0.0 0.0 0.00 12 total outflow 33.31 0.00 12393.7 668.6 136.89 13 total trapped 0.00 0.00 3121.4 168.4 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 20.1 20.1 Device: Sm_RG Type: INF_BASIN Variable: TP Mass Balance Term Flow_acft Flow_cfs LOad_IbS Load_lbs /yr Contppm 01 watershed inflows 33.31 0.00 44.8 2.4 0.49 03 infiltrate 7.17 0.00 2.1 0.1 0.11 04 exfiltrate 7.17 0.00 0.2 0.0 0.01 Page 7 p8- outputs.txt 05 filtered 0.00 0.00 1.9 0.1 07 spillway outlet 26.14 0.00 40.4 2.2 0.57 08 sedimen + decay 0.00 0.00 2.2 0.1 09 total inflow 33.31 0.00 44.8 2.4 0.49 10 surface outflow 26.14 0.00 40.4 2.2 0.57 11 groundw outflow 7.17 0.00 0.2 0.0 0.01 12 total outflow 33.31 0.00 40.6 2.2 0.45 13 total trapped 0.00 0.00 4.2 0.2 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 9.3 9.3 Device: Sm_RG Type: INF_BASIN Variable: TKN Mass Balance Term Flow_aCft Flow_cfS Load_lbs Load_lbs /yr Conc_ppm 01 watershed inflows 33.31 0.00 194.0 10.5 2.14 03 infiltrate 7.17 0.00 12.5 0.7 0.64 04 exfiltrate 7.17 0.00 1.2 0.1 0.06 05 filtered 0.00 0.00 11.3 0.6 07 spillway outlet 26.14 0.00 172.8 9.3 2.43 08 sedimen + decay 0.00 0.00 8.7 0.5 09 total inflow 33.31 0.00 194.0 10.5 2.14 10 surface outflow 26.14 0.00 172.8 9.3 2.43 11 groundw outflow 7.17 0.00 1.2 0.1 0.06 12 total outflow 33.31 0.00 173.9 9.4 1.92 13 total trapped 0.00 0.00 20.0 1.1 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 10.3 10.3 Device: Sm_RG Type: INF_BASIN Variable: cu Mass Balance Term Flow_acft Flow_cfs Load_lbs Load_lbs /yr Conc_ppm 01 watershed inflows 33.31 0.00 6.5 0.4 0.07 03 infiltrate 7.17 0.00 0.3 0.0 0.01 04 exfiltrate 7.17 0.00 0.0 0.0 0.00 05 filtered 0.00 0.00 0.3 0.0 07 spillway outlet 26.14 0.00 5.2 0.3 0.07 08 sedimen + decay 0.00 0.00 1.0 0.1 09 total inflow 33.31 0.00 6.5 0.4 0.07 10 surface outflow 26.14 0.00 5.2 0.3 0.07 11 groundw outflow 7.17 0.00 0.0 0.0 0.00 12 total outflow 33.31 0.00 5.2 0.3 0.06 13 total trapped 0.00 0.00 1.3 0.1 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 20.0 20.0 Device: Sm_RG Type: INF_BASIN Variable: PB Mass Balance Term Flow_acft Flow_Cfs Load_lbs Load_lbs /yr Conc-ppm 01 watershed inflows 33.31 0.00 3.0 0.2 0.03 03 infiltrate 7.17 0.00 0.0 0.0 0.00 04 exfiltrate 7.17 0.00 0.0 0.0 0.00 05 filtered 0.00 0.00 0.0 0.0 07 spillway outlet 26.14 0.00 2.4 0.1 0.03 08 sedimen + decay 0.00 0.00 0.6 0.0 09 total inflow 33.31 0.00 3.0 0.2 0.03 10 surface outflow 26.14 0.00 2.4 0.1 0.03 11 groundw outflow 7.17 0.00 0.0 0.0 0.00 12 total outflow 33.31 0.00 2.4 0.1 0.03 13 total trapped 0.00 0.00 0.6 0.0 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 20.1 20.1 Device: Sm_RG Type: INF_BASIN Variable: ZN Mass Balance Term Flow_acft Flow_cfs Load_lbs Load_lbs /yr conc-ppm 01 watershed inflows 33.31 0.00 72.8 3.9 0.80 03 infiltrate 7.17 0.00 12.6 0.7 0.64 04 exfiltrate 7.17 0.00 1.2 0.1 0.06 05 filtered 0.00 0.00 11.3 0.6 07 spillway outlet 26.14 0.00 59.3 3.2 0.84 08 sedimen + decay 0.00 0.00 0.9 0.0 09 total inflow 33.31 0.00 72.8 3.9 0.80 10 surface outflow 26.14 0.00 59.3 3.2 0.84 11 groundw outflow 7.17 0.00 1.2 0.1 0.06 12 total outflow 33.31 0.00 60.6 3.3 0.67 13 total trapped 0.00 0.00 12.2 0.7 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 16.8 16.8 Page 8 I p8- outputs.txt Device: Sm_RG Type: INF_BASIN Variable: HC Mass Balance Term Flow_acft Flow_cfs Load_lbs Load_lbs /yr Conc_ppm 01 watershed inflows 33.31 0.00 371.7 20.1 4.11 03 infiltrate 7.17 0.00 6.2 0.3 0.32 04 exfiltrate 7.17 0.00 0.5 0.0 0.02 OS filtered 0.00 0.00 5.7 0.3 07 spillway outlet 26.14 0.00 296.6 16.0 4.18 08 sedimen + decay 0.00 0.00 68.9 3.7 09 total inflow 33.31 0.00 371.7 20.1 4.11 10 surface outflow 26.14 0.00 296.6 16.0 4.18 11 groundw outflow 7.17 0.00 0.5 0.0 0.02 12 total outflow 33.31 0.00 297.1 16.0 3.28 13 total trapped 0.00 0.00 74.6 4.0 14 storage increase 0.00 0.00 0.0 0.0 15 mass balance chec 0.00 0.00 0.0 0.0 Reduction ( %) 0.00 0.00 20.1 20.1 Page 9 United Properties Powers Place 9/15/13 APPENDIX F STORM PIPE SIZING Storm Water Narrative Page 111 EVS 110250 Valley View Rd., Suite 123 1 Eden Prairie, MN 55344 -3534 1 Phone: 952.646.0236 1 Fax: 952.646.0290 1 www.evs- enq.com Powers Place Project No.: 2013 -057.1 Storm Frequency: 10 years Location: Chanhassen, MN MN State Zone: 1 Contract Mgr: DIN Calculations By: BMJ File: Chan storm Pipe Sizing_MN.xls Date: 09/15/13 Segment A - Trib. Areas C - Coef. To - Time of Conc. I - Intensity Q - Rate Pipe From To CB S.F. CB Ac. Pipe Ac. CB Indiv. Pipe Avg. CB Min. Pipe Min. Total Min. CB In/Hr Total In /Hr CB CFS Pipe CFS Len. R. Dia. In. Grade % Hyd. Grade Mat'I. Man's. n Vel. FUS Cap. CFS Excess Cap. Structure CB 506 CBMH 505 22,844 0.52 0.52 0.98 1 0.98 5.0 0.3 5.3 7.10 7.10 3.6 3.6 76.0 15 0.50 1 0.50 HDPE 0.010 4.8 5.9 2.3 CB 506 CBMH 505 CBMH 504 13,764 0.32 0.84 0.98 0.98 5.0 0.7 6.0 7.10 6.95 2.2 5.7 201.0 15 0.50 0.50 HDPE 0.010 4.8 5.9 0.2 CBMH 505 CBMH 504 CBMH 503 23,999 0.55 1.39 0.98 0.98 5.0 0.6 6.6 7.10 6.70 3.8 9.1 201.0 18 0.50 0.50 HDPE 0.010 5.5 9.7 0.5 CBMH 504 CBMH 503 CBMH 502 23,999 0.55 1.94 0.98 0.98 5.0 0.5 7.0 7.10 6.50 3.8 12.4 200.0 18 0.90 0.90 HDPE 0.010 7.3 13.0 0.6 CBMH 503 CBMH 502 CBMH 501 23,999 0.55 2.49 0.98 0.98 5.0 0.4 7-.41 7.10 6.50 3.8 15.9 159.0 21 0.60 0.60 HDPE 0.010 6.6 16.0 01 CBMH 502 CBMH 501 STUB 500 4,219 0.10 2.59 0.98 0.98 5.0 0.1 7.5 7.10 6.35 0.7 16.1 34.0 24 0.50 0.50 HDPE 0.010 6.6 20.8 4.7 CBMH 501 CB 302 CBMH 301 10,090 1 0.23 0.23 0.98 0.98 5.0 0.7 5.7 7.10 6.95 1.6 1.6 157.0 12 0.40 0.40 HDPE 0.010 3.7 2.9 1.4 CB 302 CBMH 301 STUB 300 9,824 0.23 0.46 0.98 0.98 5.0 0.1 5.8 7.10 6.95 1.6 3.1 38.0 12 4.00 2.50 HDPE 0.010 9.3 7.3 4.2 CBMH 301 CB 210 CBMH 201 17,321 0.40 0.40 0.98 0.98 5.0 0.1 5.1 7.10 7.10 2.8 2.8 49.0 12 1.50 1.50 HDPE 0.010 7.2 5.7 2.9 CB 210 CB 203 CBMH 202 12,796 0.29 0.29 0.98 0.98 5.0 0.5 5.5 7.10 7.10 2.0 2.0 202.0 12 1.50 1.50 HDPE 0.010 7.2 5.7 3.6 CB 203 CBMH 202 CBMH 201 10,166 0.23 0.53 0.98 0.98 5.0 0.1 5.6 7.10 6.95 1.6 3.6 59.0 12 2.50 2.50 HDPE 0.010 9.3 7.3 3.7 CBMH 202 CBMH 201 STUB 200 5,445 0.13 1.05 0.98 0.98 5.0 0.0 5.6 7.10 6.95 0.9 7.1 8.0 15 1.00 1.00 HDPE 0.010 6.8 8.4 12 CBMH 201 10250 VALLEY VIEW RD. SUITE 123 EDEN PRAIRIE, MN 55344 PHONE: 952.646.0236 FAX: 952.646.0290 www.evs -eng.com Storm Sewer Design Calculations Printed: 09/15/13 11:55 AM Upstream Structure I Downstream Structure Comments Top Rim Invert Build Type Casting Water El. Structure Top Rim Inlet Build 940.85 937.91 2.94 na R -3067 CBMH 505 940.60 937.53 3.07 940.60 937.53 3.07 48" R -3067 CBMH 504 940.60 936.53 4.07 940.60 936.33 4.27 48" R -3067 CBMH 503 940.60 935.32 5.28 940.60 935.32 5.28 48" R -3067 CBMH 502 940.60 933.52 7.08 940.60 933.32 7.28 48" R -3067 CBMH 501 939.40 932.37 7.03 939.40 932.17 7.23 48" R -3067 STUB 500 932.00 943.51 939.65 3.86 2'x3' R -3067 CBMH 301 943.51 939.02 4.49 943.51 937.52 5.99 48" R -3067 STUB 300 936.00 939.91 936.77 3.14 2'x3' R -3067 CBMH 201 943.52 936.03 7.49 943.52 940.54 2.98 2'x3' R -3067 CBMH 202. 943.52 937.51 6.01 943.52 937.51 6.01 48" R -3067 CBMH 201 943.51 936.03 7.48 943.51 935.83 7.68 48" R -3067 STUB200 935.75 10250 VALLEY VIEW RD. SUITE 123 EDEN PRAIRIE, MN 55344 PHONE: 952.646.0236 FAX: 952.646.0290 www.evs- eng.com