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HomeMy WebLinkAboutSWA000140_Stormwater Report_20220406STORMWATER MANAGEMENT REPORT West Edge Forsyth County, NC SAPA Project # 19-057CD Owner: ADAMS PROPERTY GROUP 2298 MT. PLEASANT STREET CHARLESTON, SC 29403 SEAL ' i 14985 a 3/17/22 a WA March 17, 2022 Designed By: --0#40stimmel 601 N. TRADE STREET, SUITE 200 WINSTON-SALEM, NC 27101 www.stimmelpa.com 336.723.1067 LANDSCAPE ARCHITECTURE CIVIL ENGINEERING LAND PLANNING West Edge Table of Contents Report Narrative Drainage Basin Maps • PRE-1 Pre -Development Drainage Area Exhibit • POST-1 Post Development Drainage Area Exhibit Wet Detention Pond Calculations • NCDEQ — EZ Supplement spreadsheet • Wet Detention Pond Design • Pond Report Hydrograph Calculations • Watershed Model Schematic • Hydrograph Return Period Recaps & Summary Reports 1-Yr / 24 Hour Hydrographs Watershed Characteristics • Curve Number Calculations • TR-55 Runoff Curve Numbers for Urban Areas • Time of Concentration Calculations • Soils Information • NOAA Atlas 14, Volume 2, Version 3 — Point Precipitation Frequency Estimates • Hydraflow Rainfall Report Other Information • Wetland Delineation Report • Soil Boring Map & Boring Logs • Property Deed • West Edge LP Corporation Information West Edge Forsyth County, NC INTRODUCTION The project is located at the intersection of Robinhood Rd & Meadowlark Dr in Forsyth County, NC. Three single family homes will be demolished and replaced with a mixed -use development. The project area is approximately 38.58 acres. The area directly adjacent to Robinhood Road drains into the roadway while the majority of the site drains to the west and south to Tomahawk Creek which wraps around the western & southern sides of the property before draining to the south. The West Edge project consists of constructing 73,987 sf of retail across 4 buildings, 7 multifamily buildings with 227 units, parking lots, one stormwater management system, associated storm drainage, sanitary and water distribution services. Stormwater is collected in a site -wide system of catch basins and pipes that convey runoff to the stormwater management system. The site is under NCDEQ Stormwater jurisdiction. STORMWATER MANAGEMENT SYSTEM CONFIGURATION The stormwater management system consists of a wet detention pond that has been sized to treat the runoff from the first 1-inch of rainfall for its drainage area. The wet detention pond was designed to attenuate onsite peak flows in order to reduce the overall post -development discharge rates to the pre -developed rates or less for the 1-year, 2-year and 10-year 24 hour storm events. Additionally, at least 1-foot of freeboard is maintained during the 100-year storm. The pre -developed and post -developed discharge rates were analyzed at the discharge points to Tomahawk Creek. A forebay areas is provided at the stormwater entry point into the wet detention pond. The purpose of the forebay is to collect sediment for easier removal and to dissipate energy of the incoming flow stream, thereby creating flow conditions conducive to settlement of suspended solids and to avoid re -suspension of sediment previously captured in the forebay. The forebay is separated by the main body of the pond by a baffle consisting of a soil berm and rip rap filter section. The forebay volume is required to be 15% - 20% of the main pool volume. The wet detention pond outlets through a primary spillway system consisting of a precast concrete riser and reinforced concrete pipe barrel. The riser has a drawdown orifice that releases the water quality volume from the 1-inch rainfall event over a 48-hour to 120-hour period. The water quality volume is established by the elevation difference between top of the riser and the lower drawdown orifice. A second drawdown orifice is provided at a higher elevation to manage the 10-year / 24-hour post -developed discharge rate to the pre -developed rate. A trash rack is provided on top of the riser to screen large debris that could clog the barrel from entering the riser. An emergency spillway is provided for additional capacity to pass large storm events without overtopping the dam. Results of the storm routings are included in the Hydrograph Calculations section of the report. The Pond Report identifies the culvert & orifice control structures. Culvert and weir structures are each referenced as [A], [B], [C] and [D These structures relate to the pond as follows: Culvert [A] — 30" spillway barrel Culvert [B] — 3" water quality drawdown orifice (lower) Culvert [C] — 6" 10-yr / 24-hour storm drawdown orifice (upper) Culvert [D] — Not used Weir [A] — 24' top of riser perimeter Weir [B] — 20' emergency spillway Weir [C] — Not used Weir [D] — Not used DRAINAGE BASIN The pre -developed site is comprised of three main drainage basins as shown on the Pre - Development Plan. The three drainage basins and their associated hydrograph numbers are as follows: • West -Pre — 12.84 acres (HYD. 1) which drains to the west eventually picked up by Tomahawk Creek which drains to the south • South -Pre — 13.76 acres (HYD. 2) which drains to the south and is eventually picked up by Tomahawk Creek. • North -Pre — 1.76 acres (HYD. 3) which drains to the north onto Robinhood Road. The existing storm drainage system in Robinhood Rd picks up the runoff and carries it across Robinhood to the north. The post -developed site is comprised of three main drainage basins as shown on the Post - Development Plan. The three drainage basins and their associated hydrograph numbers are as follows: • West - Bypass— 1.33 acres (HYD. 8) which consists of open space areas that drain to the west and cannot be directed to the wet pond due to elevation. • South - Bypass — 1.75 acres (HYD. 9) which consists of open space areas that drain to the south and cannot be directed to the wet pond due to elevation. • Pond - Post — 25.29 acres (HYD. 6) which is the drainage area for the wet pond. Other Hydrographs • Post Thru SCM (HYD. 7) is the wet detention pond routing • Total - Pre (HYD. 4) combines hydrographs 1, 2 and 3, and represents the total pre - developed discharge rate from the site. • Total - Post (HYD. 7) combines hydrographs 7, 8 and 9, and represents the total post - developed discharge rate from the site. SOILS AND CURVE NUMBER The USDA Soil Conservation Service's website (Soil Survey) was used to determine the existing soil group classifications. Soils present on this site have a hydrologic soils group classification of "A", "B", "C" & "Y soils. "B" soils represent a majority of the site and are used for the routings. A map of the approximate locations and description of the soils on site and TR- 55 Curve Number Table 2-2a are located in the Watershed Characteristics section of this report. TIME OF CONCENTRATION Several methods are available and are widely accepted for estimating time of concentration (SCS Lag (1), Kirpich (2), and TR-55 Methods (3)). TR-55 method was used for these calculations. Calculated time of concentration values less than 0.1 hours (6 min.) are rounded up to 6 minutes, as this is the minimum Tc in TR-55. Post developed time of concentration consists of TR-55 method for overland flow added to the calculated pipe travel time in the storm drainage collection system. The pre and post developed drainage maps shows the travel path used in the time of concentration calculations. See the watershed characteristics section for documentation. PRECIPITATION Precipitation data for the study was taken from NOAA ATLAS 14, Volume 2. Precipitation depths used in the study are as follows: Precipitation (P) — NOAA Atlas 14 Volume 2 (24-Hour) 1-Year 2-Year 10-Year 25-Year 50-Year 100-Year 2.83 in 3.42 in. 4.96 in. 5.89 in. 6.63 in. 7.40 in. *See the precipitation section in this report for documentation HYDROGRAPHS Hydraflow Hydrographs(4) computer software was used to automate the hydrograph and routing procedure. Hydraflow Hydrographs uses the Unit Hydrograph Method for calculating runoff hydrographs. More specifically, it uses the triangular D-hour Unit Hydrograph approach as used in TR-20 (5). Hydrographs were calculated based on a peaking (shape) factor of 484. ROUTINGS Storm hydrograph routing through the wet detention pond was performed using the Storage Indication Method as outlined in NEH-4(6) contained in Hydraflow Hydrographs. DESIGN PARAMETERS The stormwater management system was designed to meet the following development standards for high -density projects in accordance with the NCDEQ Stormwater Design Manual. Quality Control - The water quality device shall meet the following: • Remove 85% of the total suspended solids (TSS) in accordance with the NCDENR — Stormwater Best Management Practices Manual. • Control and treat runoff from the first one inch of rainfall. • Draw down the runoff volume no faster than forty-eight (48) hours, but no slower than one hundred twenty (120) hours. Quantity Control — The site shall meet the following: • Post -development peak discharge rates in the 1-yr 24-hour storm event shall be controlled so as not to exceed pre -development peak discharge rates for the same storm events. SUMMARY CALCULATIONS Hydrology and Hydraulic Summary The pre -developed runoff rates were compared to the post -developed runoff for the site. The routed post -developed runoff rates are lower than the predeveloped runoff rates. See Table 1-4 for a summary of the results. Refer to the hydrograph section of this report for detailed printouts of each hydrograph. Table 1- Pre/Post Comparisons Storm Event Pre- development Post - development 1-yr 24-hr 1.72 cfs 1.44 cfs 2-yr 24-hr 6.60 cfs 2.90 cfs 10-yr 24-hr 30.22 cfs 11.52 cfs 100-yr 24-hr 83.80 cfs 138.71 cfs Water Quality Summary The Wet Detention Pond was designed in accordance with the NCDENR — Stormwater Best Management Practices Manual and is designed for 85% TSS removal. The water quality volume provided exceeds the required volume for the Wet Detention Ponds. Table 2 —Wet Detention Pond Water Quality Summary Drainage BUA Surface Surface WQV WQV 100-year Desc. Area Treated Area Area Required Provided Freeboard Required Provided Wet Pond 1 25.30 ac 17.40 ac 19,176 sf 1 22,243 sf 1 61,438 cf 65,835 cf 1.12 ft Primary Spillway Barrel Outlet Protection The primary spillway outlet protection is provided as a rip rap lined discharge channel. The channel is designed to be stable for the 100-yr storm event barrel discharge based upon liner shear stress and flow velocity. The pond routing flow (HYD. 7) was used for the design flow. See the Wet Detention Pond Design spreadsheet calculations for supporting information. NARRATIVE REFERENCES: (1) SCS, 1972 - (Soil Conservation Service). (2) Z. P. Kirpich, 1940. (3) Technical Release No. 55, USDA Soil Conservation Service, December 1993 (4) Hydrowflow Hydrographs Extension for Autodesk Civil 3D by Autodesk, Inc. v2020 (5) TR-20: Computer Program Manual 1992 (6) National Engineering Handbook Section 4-Hydrology, USDA Soil Conservation Service, 1972 (7) NOAA Atlas 14, Volume 2, Version 3 — Point Precipitation Frequency Estimates WATER QUALITY CONTROL CALCULATIONS DRAINAGE BASIN MAPS J� 1no° 4. 504' - ® \ TBM - CONTROL CAP LLAND REBAR X 0� N:865969.29 4 �� E:1 595 69 .65 \/ ti Z:884.78 — OHE ® 5896-55-1858 SARAH J KEY 5896-45-7740 5316 ROBINHOOD RD OBIN HOOD BAPTIST CHURCH DB: 2439 PG: 985 WEST - PRE: 12.84 AC 422 :ROBINHOOD ROAD DB: 602 PG: 288 C N : 56 �� 864 / JOEL RAPPOPORT 5310 ROBINHOOD RD Cgg Tc = 19.90 MIN — — DB YY PG Y5 NORTH - PRE: CN: 65 Tc=6.0MIN ; 71 000 A, % ZIP 4 2 , OF O� �qy I i<I�/7 o rri \ TBM CONTROL CAP / AND REBAR N:865609.24 / A 262.50 Z:888 0 051 o / v / �(v �DT, 150 SHEET FLOW 123 SHEET FLOW i / Q E�7 a III �90 / / v �80 v v TANKG G _ Lfi / ilk V \ \ \ — �g0 A / v ��� I cp \ \ / \ — s -- -- — G �� �'Qi 1 \. j �� �,— �\ \ I I I \\ I \ \ 601 SHALLOW CONCENTRATED FLOW \ \ V �0 M 1 \\ / Vv \ / jt 850'SHALLOW CONCENTRATED FLOW 13.76 AC VICINITY MAP SCALE: NTs E 5\9-65-3Q ADOWLARK DEVELOPER-S-,LLG-,\ 1661 WISTERIA DR DB: 3�40 PG: 375 AVA DED/ / �^ I OR = 866.17 / 8T0 J NV UT = 859.87� 6 TF Q / 8P o . ` � I � � 1 \ � — � / � �, , —/ ✓ � \ \ �► � / Ge� %� �� \ I G (a / sit/ / / / / O O 5896-64-2981 S / V —� — — — G r — — �— G — — — � /// /� / �� // 'G 00- 0 0 / \ \ O - _ - 0000 00 00 O 00 A 1 I __ �� \ // O 000000,0 O O O O O O O O P 50 �� O O. 000 O O 000000000 00 0000000 0 00 O 000 O.O. 000.00 0000 00 O O \O 1 —_—_ —�--�0�00.� 00 000 O 00 00 00 / o v 0 0�0 o� 0 0 0 0 _/ o o d o 0 0 0 0 0 0 0 0 0 0 �� / o° o ° v Q d° 00 0 o°O o° 0 00 00� 00 Oo0 00 0 ��� o00�o.o. o�oo�wo 0000000 0 0�3Q 0 O. 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PLEASANT ST. CHARLESTON, SC 29403 (843) 941-4027 DATE: 02/01 /22 REVISIONS: DRAWN: BMH JOB. 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PLEASANT ST. CHARLESTON, SC 29403 (843) 941-4027 DATE: 02/01 /22 REVISIONS: DRAWN: BMH JOB. NO: 19-057CD SHEET TITLE POST DEVELOPED DRAINAGE AREA SCALE: ill = 60' SHEET NO.: POST=1 Q STIMMEL ASSOCIATES, P.A. WET DETENTION POND CALCULATIONS SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name West Edge 2 Project Area ac 25.9 3 Coastal Wetland Area ac 0 4 Surface Water Area ac 0 5 Is this project High or Low Density? High 6 Does this protect use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided feet 30 8 Will the vegetated setback remain vegetated? Yes 9 If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ? I N/A 10 1 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration S stem 12 Bioretention Cell 13 Wet Pond 1 14 Stormwater Wetland 15 Permeable Pavement 16 Sand Filter 17 Rainwater Harvesting RWH 18 Green Roof 19 Level Spreader -Filter Strip LS-FS 20 Disconnected Impervious Surface DIS 21 Treatment Swale 22 Dry Pond 23 StormFilter 24 Silva Cell 113ayfilter IFilterra 25 26 FORMS LOADED DESIGNER CERTIFICATION 27 IName and Title: Street address: City, State, Zip: Phone number( Email: J. Neal Tucker, P.E Director of Civil Enginee Stimmel Associates, PA 601 N. Trade St. Suite 200 Winston-Salem, NC 27101 336-723-1067 ntucker(a)stimmelpa.com Certification Statement: I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision; that the information provided in the form is, to the best of my knowledge and belief, true, accurate, and complete; and that the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here. N CARo 'a SEAL 14985 �! .FNG I Seal Signature f PCsigner Date 3/17/22 DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 3 Does this roiect have low densit areas? Yes 4 F5 If so, number of low densitydrainage areas 2 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 LD 1 LD 2 4 T pe of SCM Wet Pond N/A N/A 5 Total drainage area (sq ft 1235874 1101765 57728 76381 6 Onsite drainage area (sq ft 757944 757944 0 0 7 Offsite draina a area (sq ft 0 0 0 0 8 Total BUA in project (sq ft) 757944 757944 sf sf sf 9 New BUA on subdivided lots (subject to ermitting) (sq ft N/A N/A N/A N/A 10 New BUA not on subdivided lots (subject to ermittin s 11 Offsite BUA (sq ft N/A N/A N/A N/A 12 Breakdown of new BUA not on subdivided lots: - Parking (sq ft - Sidewalk (sq ft - Roof (sq ft - Roadway s ft - Future (sq ft - Other, please specify in the comment box below (sq ft) 13 New infiltrating permeable pavement on subdivided lots (sq ft N/A N/A N/A N/A 14 New infiltrating permeable pavement not on subdivided lots (sq ft) N/A N/A N/A N/A 15 Existing BUA that will remain (not subject to ermitting) (sq ft N/A N/A N/A N/A 16 Existing BUA that is already ermitted (sq ft N/A N/A N/A N/A 17 Existing BUA that will be removed (sq ft 26612 sf 26612 sf N/A N/A 18 Percent BUA 19 Design storm inches 1.0 in 1.0 in N/A N/A 20 Design volume of SCM cu ft 61438 cf 21 Calculation method for design volume Simple Method ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): WET POND Drainage area number ERAL MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build -out? Yes 4 Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H:V)? 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No 7 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the desi n volume? Yes 9 What is the method for dewatering the SCM for maintenance? Drawdown Orifice 10 If applicable, will the SCM be cleaned out after construction? Yes 11 Does the maintenance access comply with General MDC (8)? Yes 12 Does the drainage easement comply with General MDC (9)? Yes 13 If the SCM is on a single family lot, does (will?) the plat comply with General MDC (10)? N/A 14 Is there an O&M Agreement that complies with General MDC (11)? Yes 151 Is there an O&M Plan that complies with General MDC (12)? Yes 161 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensedprofessional? Yes WET POND MDC FROM 02H .1053 18 Sizing method used SA/DA 19 Has a stage/storage table been provided in the calculations? Yes 20 Elevation of the excavated main pool depth (bottom of sediment removal) (fmsl 833.50 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 834.00 221 Elevation of the bottom of the vegetated shelf (fmsl) 840.50 23 Elevation of the permanent pool (fmsl) 841.00 24 Elevation of the top of the vegetated shelf (fmsl) 841.50 25 Elevation of the temporary pool (fmsl) 846.25 26 Surface area of the main permanent pool (square feet) 22243 27 Volume of the main permanent pool (cubic feet) 96118 cf 28 Average depth of the main pool (feet) 5.09 ft 29 Average depth equation used Equation 3 30 If using equation 3, main pool perimeter (feet) 672.0 ft 31 If using equation 3, width of submerged veg. shelf (feet) 5.0 ft 32 Volume of the forebay (cubic feet) 16008 cf 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for forebay (inches) 6 in 35 Design volume of SCM (cu ft) 61438 cf 361 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) 3 in 38 If weir, weir height (inches) 39 If weir, weir length (inches) 40 Drawdown time for the temporary pool (days) 3.6 41 Are the inlet(s) and outlet located in a manner that avoids short- circuiting? Yes 42 Are berms or baffles provided to improve the flow path? Yes 43 Depth of forebay at entrance (inches) 60 in 44 Depth of forebay at exit (inches) 40 in 45 Does water flow out of the forebay in a non -erosive manner? Yes 46 Width of the vegetated shelf (feet) loft 47 Slope of vegetated shelf (H:V) 10:1 48 Does the orifice drawdown from below the top surface of the permanentpool? Yes 49 Does the pond minimize impacts to the receiving channel from the 1- r, 24-hr storm? Yes 50 Are fountains proposed? (If Y, please provide documentation that MDC(9) is met. No 51 Is a trash rack or other device provided to protect the outlet system? Yes 52 Are the dam and embankment planted in non -clumping turf grass? Yes 53 Species of turf that will be used on the dam and embankment Fescue 54 Hasa planting plan been provided for the vegetated shelf? Yes ADDITIONAL INFORMATION 55 Please use this space to provide any additional information about the wet pond(s): Wet Pond 1 4:34 PM 3/14/2022 Project: West Edge Sheet: 1 of 4 Project No.: 19-057CD Designed By: BMH Checked By: JNT Date: 11.16.2021 Revised: WATER QUALITY POND DESIGN Wet Pond 1 rE DATA WATERSHED INFORMATION On -Site Drainage Area to Pond = 25.30 acres Watershed = Yadkin River On -Site Proposed Impervious Area = 17.40 acres Classification = Site not located in classified / On -Site Future Impervious Area = 0.00 acres regulated watershed Total On -Site Impervious Area = 17.40 acres OFFSITE DATA Offsite Drainage Area to Pond = 0.00 acres Offsite Impervious Area = 0.00 acres Offsite Future Impervious Area = 0.00 acres Total Offsite Impervious Area = 0.00 acres Total Drainage Area = 25.30 acres Total Impervious Area = 17.40 acres Total Impervious % = 68.8% DETERMINE DESIGN VOLUME (DV) SIMPLE METHOD Runoff Coefficient (Rv) = 0.05 + 0.9 x IA IA = Impervious Fraction (Impervious Area/Drainage Area) Design Volume (DV) = 3630 x Rp x Rv x A, (Cubic Feet) Rp = Design Storm Depth (in) A = Drainage Area (ac) Design Storm Depth (in) = 1.00 IA = 0.688 Rv = 0.669 DV= 61,438 Cubic Feet 601 N. Trade Street, Suite 200 PHONE: (336) 723-1067 Stimmel Associates, P.A. Winston-Salem, NC 27101 FAX: (336) 723-1069 Project: West Edge Sheet: 2 of 4 Project No.: 19-057CD Designed By: BMH Checked By: JNT Date: 11.16.2021 Revised: WATER QUALITY POND DESIGN Wet Pond 1 POND SIZING CALCULATIONS Stage -Storage Data Stage (Feet) Elevation (Feet) Forebay Area (SF) Forebay Volume (CF) Cumulative Forebay Volume CF Main Pool Area (SF) Main Pool Volume (SF) Cumulative Main Pool Volume CF Cumulative Combined Volume CF 0.0 834.00 0 0 0 8582 0 0 0 2.0 836.00 1291 1291 1291 11130 19712 19712 21003 4.0 838.00 2458 3749 5040 14116 25246 44958 49998 6.0 840.00 3920 6378 11418 17706 31822 76780 88198 6.5 840.50 4324 2061 13479 18702 9102 85882 99361 7.0 841.00 5792 2529 16008 22243 10236 96118 112126 7.5 841.50 31266 13377 109496 125504 8.0 842.00 32265 15882.75 125378.25 141386 10.0 844.00 36405 68670 194048.25 210056 12.0 846.00 40772 77177 271225.25 287233 14.0 848.00 45364 86136 357361.25 373369.25 15.0 849.00 47745 46554.5 403915.75 419923.75 Stage at Permanent Pool = 7 Elevation = 841.00 Forebay Volume = 16,008.00 Main Pool Volume = 96,118.25 lForebay volume shall be 15-20% of Main Pool Volume : 16.65% Forebay Size OK 601 N. Trade Street, Suite 200 PHONE: (336) 723-1067 Stimmel Associates, P.A. Winston-Salem, NC 27101 FAX: (336) 723-1069 Project: West Edge Project No.: 19-057CD Designed By: BMH Checked By: JNT Sheet: 3 of 4 Date: 11.16.2021 Revised: I WATER QUALITY POND DESIGN I depth when shelf is submerged: Depth (Davg) = (VPP - Vshelf)/Abottomofshelf D,g = Average depth in feet VPP = Total volume of permanent pool (CF) Vshelf = Volume over shelf only (CF) Abottomofshelf = Area of wet pond at the bottom of the shelf (SF) shelf = 0.5 X Depthmaxovershelf X Perlmete rpermpool X Wldthsubmergedshelf Depthmaxovershelf = Depth of water at the deep side of the shelf (FT) Pe ri mete rpermanentpool = Perimeter of permanent pool at bottom of shelf (FT) Widthsubmergedshelf= Width from deep side of shelf to dry side (FT) Depthmaxovershelf = Pe ri mete rpermanentpool = Wldthsubmergedshelf = Vshelf = Stage at Bottom of Shelf = Elevation = Abottomofshelf = VPP = D,,,g = 0.50 FT 672.00 FT 5.00 FT 840 Cubic Feet 6.50 840.50 18,702.00 96,118.25 Cubic Feet 5.09 FT Table 1: Piedmont and Mountain SA/DA Table (Adapted from Driscoll, 1986 Percent Impervious Permanent Pool Average Depth (ft) 3.0 4.0 5.0 6.0 7.0 8.0 10% 0.51 0.43 0.37 0.30 0.27 0.25 20% 0.84 0.69 0.61 0.51 0.44 0.40 30% 1.17 0.94 0.84 0.72 0.61 0.56 40% 1.51 1.24 1.09 0.91 0.78 0.71 50% 1.79 1.51 1.31 1.13 0.95 0.87 60% 2.09 1.77 1.49 1.31 1.12 1.03 70% 2.51 2.09 1.80 1.56 1.34 1.17 80% 2.92 2.41 2.07 1.82 1.62 1.40 90% 3.25 2.64 2.31 2.04 1.84 1.59 100% 3.55 2.79 2.52 2.34 2.04 1.75 68.8% 2.46 2.05 1.76 1.53 1.31 1.15 Required SA/DA ratio = Required surface area = Provided surface area = 1.74 19,176.20 SF 22,243.00 SF Provided Surface Area OK 16.0% Larger than required surface area 601 N. Trade Street, Suite 200 PHONE: (336) 723-1067 Stimmel Associates, P.A. Winston-Salem, NC 27101 FAX: (336) 723-1069 Project: West Edge Project No.: 19-057CD Designed By: BMH Checked By: JNT Sheet: 4 of 4 Date: 11.16.2021 I Revised: I WATER QUALITY POND DESIGN I DETERMINE DESIGN VOLUME STORAGE ELEVATION & DESIGN ORIFICE DIAMETER Design Volume Storage Elevation DV = 61,438 Cubic Feet Permanent Pool Elevation = 841.00 Volume = 112,126 Cubic Feet Contour Above Permanent Pool = 842.00 Volume = 141,386 Cubic Feet Head Difference = 1.00 0 = 29,260 Cubic Feet Min. DV Elevation = 843.10 Design Orifice Diameter Orifice Equation: Q = Cd x A x (2gH)0.5 Cd = Coefficient of Discharge A = Area of Orifice Opening, Based on Diameter of Orifice g = gravity H = Driving Head, Use H/3 for Drawdown Calculations Q = Orifice Discharge Cd = 0.6 Diameter of Orifice = 3.00 in A = 0.04909 SF g = 32.2 H = 2.10 FT H/3 = 0.70 FT Q = 0.19774 CFS Determine Drawdown Time Drawdown Time = DV/Q Target Drawdown Time = 2 - 5 Days DV= 61,438 Cubic Feet Drawdown Time = 86.31 Hrs 3.60 Days 601 N. Trade Street, Suite 200 PHONE: (336) 723-1067 Stimmel Associates, P.A. Winston-Salem, NC 27101 FAX: (336) 723-1069 Pond Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Pond No. 1 - WetPond Pond Data Contours -User-defined contour areas. Conic method used for volume calculation. Begining Elevation = 834.00 ft Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sgft) Incr. Storage (cult) Total storage (cult) 0.00 834.00 8,582 0 0 2.00 836.00 12,421 20,883 20,883 4.00 838.00 16,574 28,892 49,775 6.00 840.00 21,626 38,084 87,860 7.00 841.00 28,035 24,759 112,619 7.50 841.50 31,266 14,816 127,435 8.00 842.00 32,265 15,881 143,316 10.00 844.00 36,405 68,622 211,937 12.00 846.00 40,772 77,128 289,065 14.00 848.00 45,364 86,087 375,152 15.00 849.00 47,745 46,545 421,696 Monday, 03 / 14 / 2022 Culvert / Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise (in) = 30.00 3.00 6.00 0.00 Crest Len (ft) = 24.00 20.00 Inactive 0.00 Span (in) = 30.00 3.00 6.00 0.00 Crest El. (ft) = 846.25 847.00 0.00 0.00 No. Barrels = 1 1 1 0 Weir Coeff. = 3.33 2.60 3.33 3.33 Invert El. (ft) = 833.50 841.00 844.75 0.00 Weir Type = 1 Broad Broad --- Length (ft) = 122.00 0.00 0.00 0.00 Multi -Stage = Yes No No No Slope (%) = 3.04 0.00 0.00 n/a N-Value = .013 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfil.(in/hr) = 0.000 (by Contour) Multi -Stage = n/a Yes Yes No TW Elev. (ft) = 0.00 Note: Culvert/Orifice outflows are analyzed under inlet (ic) and outlet (oc) control. Weir risers checked for orifice conditions (ic) and submergence (s). Stage / Storage / Discharge Table Stage Storage Elevation Clv A Clv B Clv C PrfRsr Wr A Wr B Wr C Wr D Exfil User Total ft cuft ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 0.00 0 834.00 0.00 0.00 0.00 --- 0.00 0.00 --- --- --- --- 0.000 2.00 20,883 836.00 1.76 is 0.00 0.00 --- 0.00 0.00 --- --- --- --- 0.000 4.00 49,775 838.00 1.76 is 0.00 0.00 --- 0.00 0.00 --- --- --- --- 0.000 6.00 87,860 840.00 1.76 is 0.00 0.00 --- 0.00 0.00 --- --- --- --- 0.000 7.00 112,619 841.00 1.76 is 0.00 0.00 --- 0.00 0.00 --- --- --- --- 0.000 7.50 127,435 841.50 1.76 is 0.14 is 0.00 --- 0.00 0.00 --- --- --- --- 0.145 8.00 143,316 842.00 1.76 is 0.22 is 0.00 --- 0.00 0.00 --- --- --- --- 0.221 10.00 211,937 844.00 1.76 is 0.40 is 0.00 --- 0.00 0.00 --- --- --- --- 0.401 12.00 289,065 846.00 1.76 is 0.52 is 0.95 is --- 0.00 0.00 --- --- --- --- 1.467 14.00 375,152 848.00 85.51 is 0.09 is 0.38 is --- 85.03 s 52.00 --- --- --- --- 137.50 15.00 421,696 849.00 89.06 is 0.05 is 0.20 is --- 88.74 s 147.08 --- --- --- --- 236.08 Project: West Edge Project No.: 19-057CD Sheet: 1 Designed By: BMH Date: 3/17/2022 Checked By: JNT Structure Location / Identifier: Wet Pond RECTANGULAR PRECAST CONCRETE STRUCTURE FLOATATION CALCULATIONS UNIT WEIGHT OF WATER = 62.4 PCF UNIT WEIGHT OF CONCRETE (In Air) = 150.0 PCF ANTI-BOUYANCY FACTOR OF SAFETY = 1.25 UNIT WEIGHT OF PIPE MATERIAL = 389 # / LF 30" class IV RCP RECTANGULAR STRUCTURE OUTSIDE OUTSIDE WALL WALL BASE LEN FT WID FT THK IN HT FT THK IN WALLS: 7.00 7.00 6.00 13.92 BASE: 0.00 0.00 0.00 DISPLACED VOLUME / WEIGHT ADDS: (Collar) HT (FT) WID (FT) THK (IN) # DISPL. BOUYANT ADD 1: 5 7 12 1 VOLUME WEIGHT FORCE ADD 2: 0 0 0 0 (CF) (LBS) (LBS) WALLS 682.08 27,144 42,562 WEIGHT DEDUCTS: BASE 0.00 0 - CORES: DIA (IN) THK (IN) # STRUCTURE: 682.08 27,144 42,562 CORE 1: 3.58 18 1 CORE 2: 6 6 2 BARREL 82.13 4,279 5,125 CORE 3: 0 0 0 COLLAR 1 35.00 5250 2,184 NOTCH: WID (IN) HT (IN) # COLLAR 2 0.00 0 0 NOTCH 1 0 0 0 NOTCH 1 -N/A- 0 -N/A- NOTCH 2 0 0 0 NOTCH 2 -N/A- 0 -N/A- CORE 1 -N/A- -16 -N/A- EXPOSED BARREL CORE 2 -N/A- -29 -N/A- LEN (FT) DIA (IN) CORE 3 -N/A- 0 -N/A- 11.00 37.00 INSTALLED TOTALS 799.21 36,628 49,871 BOUYANT FORCE = 49,871 LBS ACTING UPWARD STRUCTURE WEIGHT = 36,628 LBS ACTING DOWNWARD NET FORCE = 13,243 LBS ACTING UPWARD BALLAST REQUIREMENTS: 25,711 LBS BALLAST REQUIRED FOR FACTOR OF SAFETY OF 1.25 293.50 CUBIC FEET OF CONCRETE FACTOR LENGTH WIDTH THICKNESS VOLUME WEIGHT OF ACTUAL BALLAST: (FT) (FT) (FT) (CF) (LBS) SAFETY Ballast Pad: 10 10 2.5 250.0 21,900 1.17 Invert Pour: 6 6 0.5 18.0 2,700 24,600 1.23 BASE SECTION WEIGHT: BASE HEIGHT (FT) = 0 GROSS BASE WEIGHT (LBS) = 0 BASE SECTION BLOCK OUTS: DIA # OF WEIGHT (SHIPPING CONDITION) (IN) BLOCK OUTS (LBS) 1 0 NET BASE SECTION 2 0 SHIPPING WEIGHT: 3 0 0 LBS. sapa PROJECT: West Edge PROD. NO.: 19-057CD SHEET: of DESIGNED BY: BMH DATE: 03/17/22 CHECKED BY: .JNT DATE: Stimmel Associates, PA LOCATION / DESCRIPTION: Pond Primary Spillway Discharge Channel at Barrel Outlet OPEN CHANNEL FLOW CALCULATIONS DESIGN FLOW RATE 'Q1oo' = 85.50 CFS CHANNEL GEOMETRY: CHANNEL SLOPE = 0.50 % LEFT SIDE SLOPE = 3.00 :1 RIGHT SIDE SLOPE = 3.00 :1 BOTTOM WIDTH = 10.00 FT. Condition At Barrell Outlet JJI:IIIkiI;IeZel:FilkiIki1N11s1•]I;IQ11111[•P►E MANNING'S'n' = FLOW DEPTH = FT FLOW RATE 'Q' = #DIV/0! CFS FLOW AREA = 0.00 SF WETTED PERIMETER = 10.00 LF HYDRAULIC RADIUS = 0.00 FT FLOW VELOCITY = #DIV/0! FT/SEC VELOCITY * HYD RAD = #DIV/0! SF/SEC MAX SHEAR STRESS = 0.00 LBS/SF TOP WIDTH OF FLOW = 10.00 FT LINED CHANNEL CONDITION: MANNING'S'n' = FLOW DEPTH = FLOW RATE 'Q' = FLOW AREA = WETTED PERIMETER = HYDRAULIC RADIUS = FLOW VELOCITY = VELOCITY * HYD RAD = MAX SHEAR STRESS = TOP WIDTH OF FLOW = 0.071 10" Rip -Rap @ 24" Thickness (Class 1) 2.41 FT 85.50 CFS 41.48 SF 25.23 LF 1.64 FT 2.06 FT/SEC 3.39 SF/SEC 0.75 LBS/SF 24.45 FT COMMENTS: Liner is stable. Max shear stress for Class 2 rip rap is 3.8 psf. 601 N. Trade Street, Suite 200 PHONE: (336) 723-1067 Stimmel Associates, P.A. Winston-Salem, NC 27101 FAX: (336) 723-1069 sapa PROJECT: West Edge PROD. NO.: 19-057CD SHEET: of DESIGNED BY: BMH DATE: 03/17/22 CHECKED BY: .JNT DATE: Stimmel Associates, PA LOCATION / DESCRIPTION: Pond Primary Spillway Discharge Channel at end of Channel OPEN CHANNEL FLOW CALCULATIONS DESIGN FLOW RATE 'Q1oo' = 85.50 CFS CHANNEL GEOMETRY: CHANNEL SLOPE = 0.50 % LEFT SIDE SLOPE = 3.00 :1 RIGHT SIDE SLOPE = 3.00 :1 BOTTOM WIDTH = 20.00 FT. Condition at Full Width Channel JJI:IIIkiI;IeZel:FilkiIki1N11s1•]I;IQ11111[•P►E MANNING'S'n' = FLOW DEPTH = FT FLOW RATE 'Q' = #DIV/0! CFS FLOW AREA = 0.00 SF WETTED PERIMETER = 20.00 LF HYDRAULIC RADIUS = 0.00 FT FLOW VELOCITY = #DIV/0! FT/SEC VELOCITY * HYD RAD = #DIV/0! SF/SEC MAX SHEAR STRESS = 0.00 LBS/SF TOP WIDTH OF FLOW = 20.00 FT LINED CHANNEL CONDITION: MANNING'S'n' = FLOW DEPTH = FLOW RATE 'Q' = FLOW AREA = WETTED PERIMETER = HYDRAULIC RADIUS = FLOW VELOCITY = VELOCITY * HYD RAD = MAX SHEAR STRESS = TOP WIDTH OF FLOW = 0.070 10" Rip -Rap @ 24" Thickness (Class 1) 1.77 FT 85.50 CFS 44.76 SF 31.19 LF 1.44 FT 1.91 FT/SEC 2.74 SF/SEC 0.55 LBS/SF 30.61 FT COMMENTS: Liner is stable. Max shear stress for Class 1 rip rap is 3.8 psf. 601 N. Trade Street, Suite 200 PHONE: (336) 723-1067 Stimmel Associates, P.A. Winston-Salem, NC 27101 FAX: (336) 723-1069 t.'i stimmel 601 SN. TON-S LEM,NC2710E200 DATE: 2-2-2022 JOB#: 19-057CD WINSTON-SALEM, NC 27101 www.stimmelpa.com 336.723.1067 e West Edge g LANDSCAPE ARCHITECTURE CIVIL ENGINEERING LAND PLANNING OUTLET PROTECTION BMH CALCULATION SHEET BY: Wet Pond Do=30 in La=16 ft WI=3DD=8 ft W2=Do+La=24 ft 20 10 n Outlet IW = Do + La PIPe i diameter (Do) La —•1 ry T ilwater_< 0.5Do 60 50 ' Discharge L.J 0 1000 Curves may not be extrapolated. Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw < 0.5 diameter). HYDROGRAPH CALCULATIONS Watershed Model Schematic Hydraflow Hydrographs Extension forAutodesk® Civil 3D® by Autodesk, Inc. v2020 1 2* 3 UD 6 4 ED 8 9 CD 10 Legend Hvd. Origin Description 1 SCS Runoff West -Pre 2 SCS Runoff South -Pre 3 SCS Runoff North -Pre 4 Combine Total -Pre 6 SCS Runoff Pond -Post 7 Reservoir Post Thru SCM 8 SCS Runoff West-ByPass 9 SCS Runoff South-ByPass 10 Combine TOTAL -POST Project: WetPond_1.gpw Sunday, 08 / 29 / 2021 Hydrograph Return Period Recap Hy raflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Hyd. Hydrograph Inflow Peak Outflow (cfs) Hydrograph No. type hyd(s) Description (origin) 1-yr 2-yr 3-yr 5-yr 10-yr 25-yr 50-yr 100-yr 1 SCS Runoff ------ 0.682 2.694 ------- ------- 12.62 20.63 27.66 35.45 West -Pre 2 SCS Runoff ------ 0.839 3.505 ------- ------- 16.24 26.28 35.03 44.69 South -Pre 3 SCS Runoff ------ 1.165 2.145 ------- ------- 5.295 7.449 9.250 11.18 North -Pre 4 Combine 1, 2, 3 1.719 6.601 ------- ------- 30.22 49.10 65.57 83.80 Total -Pre 6 SCS Runoff ------ 70.75 93.43 ------- ------- 154.36 191.29 220.60 250.99 Pond -Post 7 Reservoir 6 0.447 1.079 ------- ------- 10.83 49.02 95.44 128.33 Post Thru SCM 8 SCS Runoff ------ 0.496 1.113 ------- ------- 3.242 4.752 6.034 7.424 West-ByPass 9 SCS Runoff ------ 0.638 1.431 ------- ------- 4.168 6.110 7.757 9.545 South-ByPass 10 Combine 7, 8, 9 1.442 2.899 ------- ------- 11.52 52.39 102.51 138.71 TOTAL -POST Proj. file: WetPond_1.gpw Monday, 03 / 14 / 2022 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to Peak (min) Hyd. volume (cult) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 0.682 1 736 8,092 ------ ------ ------ West -Pre 2 SCS Runoff 0.839 1 728 8,671 ------ ------ ------ South -Pre 3 SCS Runoff 1.165 1 719 2,837 ------ ------ ------ North -Pre 4 Combine 1.719 1 730 19,600 1, 2, 3 ------ ------ Total -Pre 6 SCS Runoff 70.75 1 718 143,694 ------ ------ ------ Pond -Post 7 Reservoir 0.447 1 1443 54,470 6 844.66 241,983 Post Thru SCM 8 SCS Runoff 0.496 1 720 1,508 ------ ------ ------ West-ByPass 9 SCS Runoff 0.638 1 720 1,939 ------ ------ ------ South-ByPass 10 Combine 1.442 1 720 57,917 7, 8, 9 ------ ------ TOTAL -POST WetPond_1.gpw Return Period: 1 Year Monday, 03 / 14 / 2022 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to Peak (min) Hyd. volume (cult) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 2.694 1 729 16,404 ------ ------ ------ West -Pre 2 SCS Runoff 3.505 1 725 17,579 ------ ------ ------ South -Pre 3 SCS Runoff 2.145 1 718 4,681 ------ ------ ------ North -Pre 4 Combine 6.601 1 726 38,664 1, 2, 3 ------ ------ Total -Pre 6 SCS Runoff 93.43 1 718 191,965 ------ ------ ------ Pond -Post 7 Reservoir 1.079 1 1186 86,074 6 845.39 270,222 Post Thru SCM 8 SCS Runoff 1.113 1 719 2,675 ------ ------ ------ West-ByPass 9 SCS Runoff 1.431 1 719 3,439 ------ ------ ------ South-ByPass 10 Combine 2.899 1 719 92,187 7, 8, 9 ------ ------ TOTAL -POST WetPond_1.gpw Return Period: 2 Year Monday, 03 / 14 / 2022 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to Peak (min) Hyd. volume (cult) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 12.62 1 727 47,589 ------ ------ ------ West -Pre 2 SCS Runoff 16.24 1 723 50,999 ------ ------ ------ South -Pre 3 SCS Runoff 5.295 1 718 10,719 ------ ------ ------ North -Pre 4 Combine 30.22 1 723 109,307 1, 2, 3 ------ ------ Total -Pre 6 SCS Runoff 154.36 1 717 324,694 ------ ------ ------ Pond -Post 7 Reservoir 10.83 1 753 208,393 6 846.48 314,136 Post Thru SCM 8 SCS Runoff 3.242 1 718 6,697 ------ ------ ------ West-ByPass 9 SCS Runoff 4.168 1 718 8,611 ------ ------ ------ South-ByPass 10 Combine 11.52 1 752 223,700 7, 8, 9 ------ ------ TOTAL -POST WetPond_1.gpw Return Period: 10 Year Monday, 03 / 14 / 2022 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to Peak (min) Hyd. volume (cult) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 20.63 1 726 71,393 ------ ------ ------ West -Pre 2 SCS Runoff 26.28 1 723 76,509 ------ ------ ------ South -Pre 3 SCS Runoff 7.449 1 718 14,967 ------ ------ ------ North -Pre 4 Combine 49.10 1 723 162,869 1, 2, 3 ------ ------ Total -Pre 6 SCS Runoff 191.29 1 717 407,558 ------ ------ ------ Pond -Post 7 Reservoir 49.02 1 725 290,808 6 846.95 334,576 Post Thru SCM 8 SCS Runoff 4.752 1 718 9,620 ------ ------ ------ West-ByPass 9 SCS Runoff 6.110 1 718 12,369 ------ ------ ------ South-ByPass 10 Combine 52.39 1 725 312,797 7, 8, 9 ------ ------ TOTAL -POST WetPond_1.gpw Return Period: 25 Year Monday, 03 / 14 / 2022 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to Peak (min) Hyd. volume (cult) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 27.66 1 726 92,344 ------ ------ ------ West -Pre 2 SCS Runoff 35.03 1 723 98,960 ------ ------ ------ South -Pre 3 SCS Runoff 9.250 1 718 18,575 ------ ------ ------ North -Pre 4 Combine 65.57 1 723 209,880 1, 2, 3 ------ ------ Total -Pre 6 SCS Runoff 220.60 1 717 474,361 ------ ------ ------ Pond -Post 7 Reservoir 95.44 1 723 357,510 6 847.40 353,946 Post Thru SCM 8 SCS Runoff 6.034 1 718 12,139 ------ ------ ------ West-ByPass 9 SCS Runoff 7.757 1 718 15,608 ------ ------ ------ South-ByPass 10 Combine 102.51 1 723 385,257 7, 8, 9 ------ ------ TOTAL -POST WetPond_1.gpw Return Period: 50 Year Monday, 03 / 14 / 2022 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to Peak (min) Hyd. volume (cult) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 35.45 1 726 115,699 ------ ------ ------ West -Pre 2 SCS Runoff 44.69 1 723 123,989 ------ ------ ------ South -Pre 3 SCS Runoff 11.18 1 718 22,499 ------ ------ ------ North -Pre 4 Combine 83.80 1 723 262,187 1, 2, 3 ------ ------ Total -Pre 6 SCS Runoff 250.99 1 717 544,459 ------ ------ ------ Pond -Post 7 Reservoir 128.33 1 723 427,515 6 847.88 374,712 Post Thru SCM 8 SCS Runoff 7.424 1 718 14,907 ------ ------ ------ West-ByPass 9 SCS Runoff 9.545 1 718 19,166 ------ ------ ------ South-ByPass 10 Combine 138.71 1 722 461,589 7, 8, 9 ------ ------ TOTAL -POST WetPond_1.gpw Return Period: 100 Year Monday, 03 / 14 / 2022 -YR / 24 HOUR HYDROGRAPHS Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Monday, 03 / 14 / 2022 Hyd. No. 1 West -Pre Hydrograph type = SCS Runoff Peak discharge = 0.682 cfs Storm frequency = 1 yrs Time to peak = 736 min Time interval = 1 min Hyd. volume = 8,092 cuft Drainage area = 12.840 ac Curve number = 56 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 19.90 min Total precip. = 2.83 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 West -Pre Hyd. No. 1 -- 1 Year Q (cfs) 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 1 1 1 .I I I I I I 1. 1 0.00 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 1 Time (min) Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Monday, 03 / 14 / 2022 Hyd. No. 2 South -Pre Hydrograph type = SCS Runoff Peak discharge = 0.839 cfs Storm frequency = 1 yrs Time to peak = 728 min Time interval = 1 min Hyd. volume = 8,671 cuft Drainage area = 13.760 ac Curve number = 56 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 14.70 min Total precip. = 2.83 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 South -Pre Hyd. No. 2 -- 1 Year Q (cfs) 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 1 1 1 .I I I I I I I. 1 0.00 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 2 Time (min) Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Hyd. No. 3 North -Pre Hydrograph type = SCS Runoff Storm frequency = 1 yrs Time interval = 1 min Drainage area = 1.760 ac Basin Slope = 0.0 % Tc method = User Total precip. = 2.83 in Storm duration = 24 hrs Q (cfs) 2.00 1.00 Peak discharge Time to peak Hyd. volume Curve number Hydraulic length Time of conc. (Tc) Distribution Shape factor North -Pre Hyd. No. 3 -- 1 Year 120 240 360 480 600 720 840 960 Hyd No. 3 Monday, 03 / 14 / 2022 = 1.165 cfs = 719 min = 2,837 cuft = 65 = 0 ft = 6.00 min = Type II = 484 Q (cfs) 2.00 1.00 0.00 1080 1200 1320 1440 1560 Time (min) Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Monday, 03 / 14 / 2022 Hyd. No. 4 Total -Pre Hydrograph type = Combine Peak discharge = 1.719 cfs Storm frequency = 1 yrs Time to peak = 730 min Time interval = 1 min Hyd. volume = 19,600 cuft Inflow hyds. = 1, 2, 3 Contrib. drain. area = 28.360 ac Q (cfs) 2.00 1.00 Total -Pre Hyd. No. 4 -- 1 Year 120 240 360 480 600 720 840 960 Hyd No. 4 Hyd No. 1 Hyd No. 2 Q (cfs) 2.00 1.00 0.00 1080 1200 1320 1440 1560 Time (min) Hyd No. 3 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Hyd. No. 6 Pond -Post Hydrograph type = SCS Runoff Storm frequency = 1 yrs Time interval = 1 min Drainage area = 25.290 ac Basin Slope = 0.0 % Tc method = TR55 Total precip. = 2.83 in Storm duration = 24 hrs Q (cfs) 80.00 70.00 50.00 40.00 30.00 10.00 Peak discharge Time to peak Hyd. volume Curve number Hydraulic length Time of conc. (Tc) Distribution Shape factor Pond -Post Hyd. No. 6 -- 1 Year Monday, 03 / 14 / 2022 = 70.75 cfs = 718 min = 143,694 cuft = 86 = 0 ft = 6.50 min = Type II = 484 Q (cfs) 80.00 70.00 50.00 40.00 30.00 20.00 10.00 0.00 1 1 1 1 1 1 1 1 10.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 — Hyd No. 6 Time (min) Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Monday, 03 / 14 / 2022 Hyd. No. 7 Post Thru SCM Hydrograph type = Reservoir Peak discharge = 0.447 cfs Storm frequency = 1 yrs Time to peak = 1443 min Time interval = 1 min Hyd. volume = 54,470 cuft Inflow hyd. No. = 6 - Pond -Post Max. Elevation = 844.66 ft Reservoir name = WetPond Max. Storage = 237,379 cuft Storage Indication method used. Wet pond routing start elevation = 841.00 ft Q (cfs) 80.00 70.00 •1 11 50.00 40.00 30.00 r1 11 10.00 Post Thru SCM Hyd. No. 7 -- 1 Year Q (cfs) 80.00 70.00 •1 11 50.00 40.00 30.00 20.00 10.00 0.00 0.00 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 Time (min) — Hyd No. 7 Hyd No. 6 Total storage used = 237,379 cuft Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Monday, 03 / 14 / 2022 Hyd. No. 8 West-ByPass Hydrograph type = SCS Runoff Peak discharge = 0.496 cfs Storm frequency = 1 yrs Time to peak = 720 min Time interval = 1 min Hyd. volume = 1,508 cuft Drainage area = 1.330 ac Curve number = 61 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 6.00 min Total precip. = 2.83 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 0 West-ByPass Hyd. No. 8 -- 1 Year Q (cfs) 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 8 Time (min) Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Monday, 03 / 14 / 2022 Hyd. No. 9 South-ByPass Hydrograph type = SCS Runoff Peak discharge = 0.638 cfs Storm frequency = 1 yrs Time to peak = 720 min Time interval = 1 min Hyd. volume = 1,939 cuft Drainage area = 1.710 ac Curve number = 61 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 6.00 min Total precip. = 2.83 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 South-ByPass Hyd. No. 9 -- 1 Year Q (cfs) 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 1 1 1 11 I I I I 1 i. 1 0.00 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 9 Time (min) Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020.4 Monday, 03 / 14 / 2022 Hyd. No. 10 TOTAL -POST Hydrograph type = Combine Peak discharge = 1.442 cfs Storm frequency = 1 yrs Time to peak = 720 min Time interval = 1 min Hyd. volume = 57,917 cuft Inflow hyds. = 7, 8, 9 Contrib. drain. area = 3.040 ac Q (Cfs) 2.00 1.00 TOTAL -POST Hyd. No. 10 -- 1 Year Q (cfs) 2.00 1.00 0.00 300 600 900 1200 1500 1800 2100 2400 2700 3000 Time (min) Hyd No. 10 Hyd No. 7 Hyd No. 8 Hyd No. 9 WATERSHED CHARACTERISTICS Project : West Edge Sheet : 1 Project No.: 19-057CD Date : 8/29/2021 Designed by: BMH Checked by: JNT SCS RUNOFF CURVE NUMBERS West- Existing Conditions BASIN LAND USE SOIL NAME HYDROL. GROUP AREA (SF.) AREA (AC.) AREA (%) CURVE NO (CN) CN x AREA Undisturbed Area - Wooded Ci/Na B 433,558 9.95 77.51 % 55 547 Open Space - Good Ci/Na B 124,351 2.85 22.23% 61 174 Disturbed Area - Impervious Ci/Na B 1,455 0.03 0.26% 98 3 TOTALS 559,364 12.84 100.0% 725 WEIGHTED CN (PRE -DEVELOPED) = 56 South- Existing Conditions BASIN LAND USE SOIL NAME HYDROL. GROUP AREA (SF.) AREA (AC.) AREA (%) CURVE NO (CN) CN x AREA Undisturbed Area - Wooded Ci/Na B 555,547 12.75 92.66% 55 701 Open Space - Good Ci/Na B 32,286 0.74 5.39% 61 45 Disturbed Area - Impervious Ci/Na B 11,707 0.27 1.95% 98 26 TOTALS 599,540 13.76 100.0% 773 WEIGHTED CN (PRE -DEVELOPED) = 56 North - Existing Conditions BASIN LAND USE SOIL NAME HYDROL. GROUP AREA (SF.) AREA (AC.) AREA (%) CURVE NO (CN) CN x AREA Undisturbed Area - Wooded Ci/Na B 29,600 0.68 38.57% 55 37 Open Space - Good Ci/Na B 33,684 0.77 43.90% 61 47 Disturbed Area - Impervious Ci/Na B 13,450 0.31 17.53% 98 30 TOTALS 76,734 1.76 100.0% 115 WEIGHTED CN (PRE -DEVELOPED) = 65 Project: West Edge Project No.: 19-057CD Designed by: BMH Checked by: JNT Sheet: Date : 1 8/29/2021 SCS RUNOFF CURVE NUMBERS West- SCM Drainage Area BASIN LAND USE SOIL NAME HYDROL. GROUP AREA (SF.) AREA (AC.) AREA (%) CURVE NO (CN) CN x AREA Undistrubed Area - Wooded Ci/Na B 0 0.00 0.00% 55 0 Disturbed Area - Open Space Ci/Na B 343,821 7.89 31.21 % 61 481 Disturbed Area - Impervious 757,944 17.40 68.79% 98 1705 TOTALS 1,101,765 25.29 100.0% 2187 WEIGHTED CN (POST -DEVELOPED) = 86 West- Bypass Area BASIN LAND USE SOIL NAME HYDROL. GROUP AREA (SF.) AREA (AC.) AREA (%) CURVE NO (CN) CN x AREA Disturbed Area - Open Space Ci/Na B 57,728 1.33 100.00% 61 81 Undisturbed Area - Wooded Ci/Na B 0 0.00 0.00% 55 0 TOTALS 57,728 1.33 100.0% 81 WEIGHTED CN (POST -DEVELOPED) = 61 South- Bypass Area BASIN LAND USE SOIL NAME HYDROL. GROUP AREA (SF.) AREA (AC.) AREA (%) CURVE NO (CN) CN x AREA Disturbed Area - Open Space Ci/Na B 76,381 1.75 100.00% 61 107 Undisturbed Area - Wooded Ci/Na B 0 0.00 0.00% 55 0 TOTALS 76,381 1.75 100.0% 107 WEIGHTED CN (POST -DEVELOPED) = 61 Chapter 2 Estimating Runoff Technical Release 55 Urban Hydrology for Small Watersheds Table 2-2a Runoff curve numbers for urban areas I/ Curve numbers for ----------- Cover description ------------------ -----hydrologic soil group ------ Average percent Cover type and hydrologic condition impervious area v A B C D Fully developed urban areas (vegetation established) Open space (lawns, parks, golf courses, cemeteries, etc.) a/: Poor condition (grass cover < 50%).......................................... 68 79 86 89 Fair condition (grass cover 50% to 75%).................................. Good condition (grass cover > 75%)......................................... 49 39 61 79 74 84 80 Impervious areas: Paved parking lots, roofs, driveways, etc. (excluding right-of-way)............................................................. 98 98 98 98 Streets and roads: Paved; curbs and storm sewers (excluding right-of-way)................................................................................ 98 98 98 98 Paved; open ditches (including right-of-way) .......................... 83 89 92 93 Gravel (including right -of -way) ................................................. 76 85 89 91 Dirt (including right -of -way) ...................................................... 72 82 87 89 Western desert urban areas: Natural desert landscaping (pervious areas only) / ..................... 63 77 85 88 Artificial desert landscaping (impervious weed barrier, desert shrub with 1- to 2-inch sand or gravel mulch and basin borders)...................................................................... 96 96 96 96 Urban districts: Commercial and business................................................................. 85 89 92 94 95 Industrial............................................................................................. 72 81 88 91 93 Residential districts by average lot size: 1/8 acre or less (town houses).......................................................... 65 77 85 90 92 1/4 acre................................................................................................ 38 61 75 83 87 1/3 acre................................................................................................ 30 57 72 81 86 1/2 acre................................................................................................ 25 54 70 80 85 1 acre................................................................................................... 20 51 68 79 84 2 acres.................................................................................................. 12 46 65 77 82 Developing urban areas Newly graded areas (pervious areas only, no vegetation) 5/ ................................................................ 77 86 91 94 Idle lands (CN's are determined using cover types similar to those in table 2-2c). 1 Average runoff condition, and Ia = 0.2S. 2 The average percent impervious area shown was used to develop the composite CN's. Other assumptions are as follows: impervious areas are directly connected to the drainage system, impervious areas have a CN of 98, and pervious areas are considered equivalent to open space in good hydrologic condition. CN's for other combinations of conditions may be computed using figure 2-3 or 2-4. 3 CN's shown are equivalent to those of pasture. Composite CN's may be computed for other combinations of open space cover type. 4 Composite CN's for natural desert landscaping should be computed using figures 2-3 or 2-4 based on the impervious area percentage (CN = 98) and the pervious area CN. The pervious area CN's are assumed equivalent to desert shrub in poor hydrologic condition. 5 Composite CN's to use for the design of temporary measures during grading and construction should be computed using figure 2-3 or 24 based on the degree of development (impervious area percentage) and the CN's for the newly graded pervious areas. (210-VI-TR-55, Second Ed., June 1986) 2-5 Chapter 2 Estimating Runoff Technical Release 55 Urban Hydrology for Small Watersheds Table 2-2c Runoff curve numbers for other agricultural lands I/ Curve numbers for ----------------------- Cover description ---------------------- ------- hydrologic soil group ------- Hydrologic Cover type condition A B C D Pasture, grassland, or range —continuous Poor 68 79 86 89 forage for grazing., Fair 49 69 79 84 Good 39 61 74 80 Meadow —continuous grass, protected from — 30 58 71 78 grazing and generally mowed for hay. Brush —brush -weed -grass mixture with brush Poor 48 67 77 83 the major element. 3/ Fair 35 56 70 77 Good 30 48 65 73 Woods —grass combination (orchard Poor 57 73 82 86 or tree farm). Fair 43 65 76 82 Good 32 58 72 79 Woods. s6J Poor 45 66 77 83 Fair 36 73 79 Good 30 V 55 70 77 Farmsteads —buildings, lanes, driveways, — 59 74 82 86 and surrounding lots. 1 Average runoff condition, and Ia = 0.25. 2 Poor. <50%) ground cover or heavily grazed with no mulch. Fair: 50 to 75% ground cover and not heavily grazed. Good: > 75% ground cover and lightly or only occasionally grazed. 3 Poor. <50%ground cover. Fair: 50 to 75% ground cover. Good: >759/oground cover. 4 Actual curve number is less than 30; use CN = 30 for runoff computations. 5 CN's shown were computed for areas with 50%woods and 50%grass (pasture) cover. Other combinations of conditions may be computed from the CN's for woods and pasture. 6 Poor: Forest litter, small trees, and brush are destroyed by heavy grazing or regular burning. Fair: Woods are grazed but not burned, and some forest litter covers the soil. Good: Woods are protected from grazing, and litter and brush adequately cover the soil. (210-VI-TR-55, Second Ed., June 1986) 2-7 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020 Hyd. No. 1 West -Pre Description A B C Totals Sheet Flow Manning's n-value = 0.400 0.011 0.011 Flow length (ft) = 123.0 0.0 0.0 Two-year 24-hr precip. (in) = 3.42 0.00 0.00 Land slope (%) = 5.40 0.00 0.00 Travel Time (min) = 16.48 + 0.00 + 0.00 = 16.48 Shallow Concentrated Flow Flow length (ft) = 850.00 0.00 0.00 Watercourse slope (%) = 6.60 0.00 0.00 Surface description = Unpaved Paved Paved Average velocity (ft/s) =4.15 0.00 0.00 Travel Time (min) = 3.42 + 0.00 + 0.00 = 3.42 Channel Flow X sectional flow area (sqft) = 0.00 0.00 0.00 Wetted perimeter (ft) = 0.00 0.00 0.00 Channel slope (%) = 0.00 0.00 0.00 Manning's n-value = 0.015 0.015 0.015 Velocity (ft/s) =0.00 0.00 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc.............................................................................. 19.90 min TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020 Hyd. No. 2 South -Pre Description A B C Totals Sheet Flow Manning's n-value = 0.240 0.011 0.011 Flow length (ft) = 150.0 0.0 0.0 Two-year 24-hr precip. (in) = 3.42 0.00 0.00 Land slope (%) = 6.00 0.00 0.00 Travel Time (min) = 12.30 + 0.00 + 0.00 = 12.30 Shallow Concentrated Flow Flow length (ft) = 601.00 0.00 0.00 Watercourse slope (%) = 6.65 0.00 0.00 Surface description = Unpaved Paved Paved Average velocity (ft/s) =4.16 0.00 0.00 Travel Time (min) = 2.41 + 0.00 + 0.00 = 2.41 Channel Flow X sectional flow area (sqft) = 0.00 0.00 0.00 Wetted perimeter (ft) = 0.00 0.00 0.00 Channel slope (%) = 0.00 0.00 0.00 Manning's n-value = 0.015 0.015 0.015 Velocity (ft/s) =0.00 0.00 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc.............................................................................. 14.70 min TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020 Hyd. No. 6 Pond -Post Description A B C Totals Sheet Flow Manning's n-value = 0.410 0.011 0.011 Flow length (ft) = 15.0 0.0 0.0 Two-year 24-hr precip. (in) = 3.42 0.00 0.00 Land slope (%) = 5.00 0.00 0.00 Travel Time (min) = 3.22 + 0.00 + 0.00 = 3.22 Shallow Concentrated Flow Flow length (ft) = 74.00 0.00 0.00 Watercourse slope (%) = 3.00 0.00 0.00 Surface description = Paved Paved Paved Average velocity (ft/s) =3.52 0.00 0.00 Travel Time (min) = 0.35 + 0.00 + 0.00 = 0.35 Channel Flow X sectional flow area (sqft) = 15.90 0.00 0.00 Wetted perimeter (ft) = 14.00 0.00 0.00 Channel slope (%) = 1.00 0.00 0.00 Manning's n-value = 0.015 0.015 0.015 Velocity (ft/s) =10.82 0.00 0.00 Flow length (ft) ({0})1900.0 0.0 0.0 Travel Time (min) = 2.93 + 0.00 + 0.00 = 2.93 Total Travel Time, Tc.............................................................................. 6.50 min r W ran F. RobinM_ood.- _ - -� - '��; s` rIRK . ii - -- ��... RobinhoogRq �CIB� i �' "f -- - ,. r ... — _ FaD01. ..I , \ IIfIIIII _ Fa, .qj r 17 ® Nlillllll WWI a 4-41 ,. Rob�nhOpq m m dA , wry,, '. ��� ♦Sr' ��~ � I f �y.•,.—. Hootsdale Dr � 6 OooD HCDP muf woR [bc eCDDNd ct2 RhN@ WAM. R 4 r r. RaD RaB i- r 3 � A i SmF t;oA "R m—mrLynndale Ct FAR s `-age A ... r FaF /// ;;+ . j , ;Wt SmF. lk, FIN � - ' •t r �e 3C - - Robinhood PoF Pp,r }i•�u, ';N'S+'y, � �` �'lyv,h4 !1 ',� r• �mx 7 PoF E J o _ w , � � • �/ it p,o �». - \CIC h:=(!`�' ! 1 • fi Av ,. f� 1 OF yD f _ r a�• ✓ it' _f s ,1 ~ -, .l � •1 yµ,` r 1 r G Hydrologic Soil Group —Forsyth County, North Carolina MAP LEGEND Area of Interest (AOI) 0 Area of Interest (AOI) Soils Soil Rating Polygons 0 A 0 A/D 0 B 0 B/D C 0 C/D 0 D 0 Not rated or not available Soil Rating Lines r 0 A r 0 A/D B B/D N 0 C r 0 C/D r 0 D r 0 Not rated or not available Soil Rating Points 0 A 0 A/D 0 B 0 B/D ❑ C 0 C/D 0 D ❑ Not rated or not available Water Features Streams and Canals Transportation — Rails ­0 Interstate Highways US Routes Major Roads Local Roads Background D6 Aerial Photography MAP INFORMATION The soil surveys that comprise your AOI were mapped at 1:15,800. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Forsyth County, North Carolina Survey Area Data: Version 20, Jun 3, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 14, 2014—Jun 26, 2014 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. usoA Natural Resources Web Soil Survey 7/28/2020 Conservation Service National Cooperative Soil Survey Page 2 of 4 Hydrologic Soil Group -Forsyth County, North Carolina Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI CaC Casville sandy loam, 6 C 2.6 1.6% to 10 percent slopes CaD Casville sandy loam, 10 C 3.4 2.2% to 15 percent slopes CIB Clifford sandy loam, 2 to A 18.7 12.1 % 6 percent slopes CIC Clifford sandy loam, 6 to A 36.5 23.6% 10 percent slopes CoA Codorus loam, 0 to 2 B/D 3.3 2.2% percent slopes, frequently flooded FaB Fairview fine sandy B 1.4 0.9% loam, 2 to 6 percent slopes FaC Fairview fine sandy B 6.5 4.2% loam, 6 to 10 percent slopes FaD Fairview fine sandy B 13.5 8.7% loam, 10 to 15 percent slopes FaF Fairview fine sandy B 4.0 2.6% loam, 15 to 45 percent slopes NaC Nathalie sandy loam, 6 B 19.2 12.4% to 10 percent slopes PoB Poplar Forest fine sandy B 9.5 6.2% loam, 2 to 6 percent slopes PoC Poplar Forest fine sandy B 5.6 3.6% loam, 6 to 10 percent slopes PoD Poplar Forest fine sandy B 7.5 4.9% loam, 10 to 15 percent slopes PoF Poplar Forest fine sandy B 0.2 0.2% loam, 15 to 45 percent slopes RaB Rasalo fine sandy loam, C 0.4 0.2% 2 to 6 percent slopes RaD Rasalo fine sandy loam, C 4.1 2.7% 10 to 15 percent slopes SmF Siloam sandy loam, 15 D 11.0 7.1 % to 45 percent slopes USDA Natural Resources Web Soil Survey 7/28/2020 Conservation Service National Cooperative Soil Survey Page 3 of 4 Hydrologic Soil Group —Forsyth County, North Carolina Map unit symbol Map unit name Rating Acres in AOI Percent of AOI TcD Toast sandy loam, 10 to 15 percent slopes B 7.2 4.6% Totals for Area of Interest 164.8 100.0% Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long -duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink -swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff.- None Specified Tie -break Rule: Higher USDA Natural Resources Web Soil Survey 7/28/2020 Conservation Service National Cooperative Soil Survey Page 4 of 4 West Edge - USGS Map 04 k J Z. y 2-f - �A -2 1 r ju 77---� 171:---'- 3/14/2022, 8:40:11 AM Override 1 -77] 0 7-7 Tc 1:24,000 0 0.15 0.3 0.6 mi 0 0.25 0.5 1 km USGS The National Map: National Boundaries Dataset, 3DEP Elevation USGS 2021 USGS Hydraflow Rainfall Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2020 Return Period Intensity -Duration -Frequency Equation Coefficients (FHA) (Yrs) B D E (N/A) 1 0.0000 0.0000 0.0000 -------- 2 38.8943 8.2000 0.7572 -------- 3 0.0000 0.0000 0.0000 -------- 5 49.1292 9.8000 0.7553 -------- 10 57.1093 10.7000 0.7573 -------- 25 68.6696 11.6000 0.7600 -------- 50 78.1106 12.2000 0.7626 -------- 100 88.1981 12.8000 0.7663 -------- File name: FORSYTH.IDF Intensity = B / (Tc + D)^E Sunday, 08 / 29 / 2021 Return Period Intensity Values (in/hr) (Yrs) 5 min 10 15 20 25 30 35 40 45 50 55 60 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2 5.51 4.32 3.60 3.10 2.74 2.47 2.25 2.07 1.92 1.79 1.68 1.59 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5 6.42 5.15 4.35 3.78 3.36 3.04 2.78 2.57 2.39 2.24 2.10 1.99 10 7.10 5.76 4.89 4.27 3.81 3.45 3.16 2.92 2.72 2.55 2.40 2.27 25 8.12 6.65 5.67 4.98 4.45 4.04 3.71 3.43 3.20 3.00 2.82 2.67 50 8.92 7.34 6.29 5.53 4.95 4.50 4.13 3.83 3.57 3.35 3.16 2.99 100 9.71 8.03 6.90 6.08 5.45 4.96 4.56 4.22 3.94 3.70 3.48 3.30 Tc = time in minutes. Values may exceed 60. Precip. file name: I:\Civil\Hydraflow\Precip\Forsyth.pcp Storm Rainfall Precipitation Table (in) Distribution 1-yr 2-yr 3-yr 5-yr 10-yr 25-yr 50-yr 100-yr SCS 24-hour 2.83 3.42 0.00 4.28 4.96 5.89 6.63 7.40 SCS 6-Hr 1.97 2.38 0.00 2.99 3.45 4.08 4.58 5.08 Huff -1st 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-2nd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-3rd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-4th 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-Indy 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Custom 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 8/29/2021 Precipitation Frequency Data Server NOAA Atlas 14, Volume 2, Version 3 WINSTON SALEM REYNOL Station ID: 31-9539 Location name: Winston Salem, North Carolina,'° USA* e Latitude: 36.1333°, Longitude:-80.2333° Elevation: "� M Elevation (station metadata): 994 ft** *source: ESRI Maps - source: USGS POINT PRECIPITATION FREQUENCY ESTIMATES G.M. Bonnin, D. Martin, B. Lin, T. Parzybok, M.Yekta, and D. Riley NOAA, National Weather Service, Silver Spring, Maryland PF tabular I PF graphical I Maps & aerials PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1 Average recurrence interval (years) 1 2 5 10 25 5D 10D 200 500 10D0 0.373 0.443 0.520 0.572 0.633 0.672 0.708 0.739 0.772 0.795 5-min (0.344-0.405) (0.410-0.482) (0.479-0.566) (0.527-0.621) (0.579-0.686) (0.612-0.729) (0.640-0.769) (0.664-0.804) (0.686-0.844) (0.700-0.871) 0.596 0.709 0.833 0.916 1.01 1.07 1.13 1.17 1.22 1.25 10-min (0.550-0.646) (0.655-0.771) (0.768-0.906) (0.842-0.993) (0.923-1.09) (0.974-1.16) 1 (1.02-1.22) 1 (1.05-1.27) 11 (1.09-1.34) 1 (1.10-1.37) D.745 0.891 1.05 1.16 1.28 1.36 1.42 1.48 1.54 1.57 15-min (0.687-0.808) (0.824-0.969) (0.971-1.15) 1 (1.07-1.26) 11 (1.17-1.39) 1 (1.23-1.47) 1 (1.29-1.54) 1 (1.33-1.61) 11 (1.37-1.68) 1 (1.38-1.72) 1.02 1.23 1.50 1.68 1.89 2.04 2.18 2.30 2.45 2.54 30-min (0.942-1.11) 11 (1.14-1.34) 11 (1.38-1.63) 1 (1.54-1.82) 11 (1.73-2.05) (1.86-2.22) 1 (1.97-2.37) 1 (2.07-2.50) 11 (2.17-2.67) 1 (2.24-2.79) 1.27 1.55 1.92 2.19 2.52 2.77 3.00 7 3.23 7 3.51 3.71 60-min (1.18-1.38) (1.43-1.68) (1.77-2.09) (2.01-2.37) (2.31-2.73) (2.52-3.00) (2.71-3.26) (2.90-3.51) (3.12-3.84) (3.27-4.07) 1.50 1.82 2.28 2.62 3.06 3.40 3.74 4.07 4.50 4.83 2-hr (1.38-1.63) (1.68-1.98) (2.10-2.48) (2.40-2.85) (2.79-3.33) (3.08-3.70) (3.36-4.07) (3.62-4.43) (3.96-4.92) (4.20-5.29) 1.61 1.95 2.45 7 2.82 7 3.31 3.68 4.06 7 4-A2 7 4.91 5.28 3-hr (1.48-1.75) (1.80-2.13) (2.26-2.66) (2.59-3.06) (3.01-3.59) 1 (3.33-3.99) 1 (3.65-4.40) (3.94-4.81) (4.32-5.35) 1 (4.58-5.77) 1.97 2.38 2.99 3.46 4.08 4.58 5.09 5.60 6.31 6.85 6-hr (1 .82-2.15) (2.20-2.60) (2.75-3.26) (3.17-3.76) (3.72-4.44) (4.14-4.97) 1 (4.55-5.52) (4.95-6.07) (5.49-6.86) 1 (5.88-7.46) 2.35 2.85 3.58 4.16 4.97 5.62 6.30 7.00 7.99 8.77 12-hr (2.17-2.57) (2.62-3.12) (3.29-3.91) (3.81-4.53) (4.51-5.39) (5.06-6.08) (5.61-6.80) (6.16-7.56) (6.90-8.63) (7.46-9.48) 2.83 3.42 4.28 4.96 5.89 6.64 7.41 8.21 9.31 10.2 24-hr (2.62-3.07) (3.17-3.70) (3.95-4.63) (4.57-5.36) (5.41-6.37) (6.08-7.18) (6.76-8.02) (7.45-8.90) (8.39-10.1) (9.14-11.1) 3.30 3.97 4.93 5.67 6.66 7.45 8.25 9.08 10.2 11.1 2-day (3.07-3.55) (3.70-4.27) (4.58-5.29) (5.26-6.08) (6.16-7.15) (6.87-8.01) (7.58-8.89) (8.30-9.80) (9.27-11.0) (10.0-12.0) 3.50 4.20 5.20 5.97 7.03 7.86 8.71 9.59 10.8 11.7 3-day (3.26-3.75) (3.92-4.51) (4.85-5.57) (5.56-6.40) (6.51-7.53) (7.26-8.44) (8.02-9.37) (8.78-10.3) (9.81-11.7) (10.6-12.7) 3.70 4.44 5.47 6.28 7.39 8.27 9.17 10.1 11.4 12.4 4-day (3.46-3.96) (4.15-4.75) (5.11-5.86) (5.87-6.72) (6.87-7.91) (7.66-8.87) (8.45-9.85) (9.26-10.9) (10.4-12.3) (11.2-13.4) 4.22 5.04 6.13 7.00 8.18 9.11 10.1 11.1 12.4 13.5 7-day (3.95-4.51) (4.72-5.39) (5.73-6.55) (6.53-7.47) (7.60-8.74) (8.43-9.75) (9.28-10.8) (10.1-11.9) (11.3-13.4) (12.2-14.6) 4.80 5.71 6.87 7.79 9.03 10.0 11.0 12.0 13.4 14.5 10-day (4.51-5.10) (5.37-6.07) (6.46-7.30) (7.30-8.27) (8.43-9.60) (9.32-10.7) (10.2-11.7) (11.1-12.8) (12.3-14.4) (13.2-15.6) 6.46 7.63 9.05 10.2 11.7 12.9 14.1 15.4 17.0 18.3 20-day (6.11-6.83) (7.23-8.07) (8.56-9.57) (9.60-10.8) (11.0-12.4) (12.1-13.7) (13.2-15.0) (14.3-16.3) (15.7-18.2) (16.8-19.7) 8.00 9.42 11.0 12.1 13.7 14.9 16.0 17.2 18.8 19.9 3D-day (7.62-8.40) (8.95-9.88) (10.4-11.5) (11.5-12.7) (13.0-14.4) (14.0-15.6) (15.1-16.9) (16.1-18.2) (17.5-19.8) (18.5-21.2) 10.1 11.8 13.5 14.9 16.6 18.0 19.3 20.5 22.2 23.5 45-day (9.64-10.6) (11.3-12.4) (12.9-14.2) (14.2-15.6) (15.8-17.4) (17.0-18.8) (18.2-20.2) (19.4-21.6) (20.8-23.4) (21.9-24.8) 12.1 14.1 15.9 17.3 19.1 20.5 21.7 23.0 24.6 25.7 60-day (11.6-12.6) (13.5-14.7) (15.2-16.6) (16.6-18.1) (18.2-20.0) (19.5-21.4) (2o.7-22.8) (21.8-24.1) (23.2-25.8) (24.2-27.1) Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS). Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values. Please refer to NOAA Atlas 14 document for more information. Back to Top PF graphical https://hdsc.nws. noaa.gov/hdsc/pfds/pfds_Pri ntpage. html?st=nc&sta=31-9539&data=depth&u n its=english&series=pds 1 /4 Hydraflow Storm Sewers Extension for Autodesk@ Civil 3D@ Plan U I#1 (3 74 Cl #174 75 Cl #175 73 76 Cl #176 Cl #112 77 78 Cl #178 2 CI #111 7 171 Cl #177 79 71 Cl #A317#168 Cl #179 68 80 70 Cl #167 C til 70 CI#180 67 Cl #148 69 Cl #166 48 66 Cl #Qffi#1626 64 10 #165 GI #156 #108 Cl #147 47 CI # 56 GI #152 43 Cl #142 62 55 GI #155 52 #107 61 CI#161 GI #154 GI#151 42 Cl #159 60 Cl #160 54 51 Cl #138 GI #153 53 50 GI #150 38 #106 59 CI#137 GI #149 37 Cl #158 Cl #136 105 49 104 58 36 Cl #1345 34 CI #157 57 33 Cl #133 CI #135 32 Cl #130 103 CI#132 Cl§12930 Cl #131 29Cl #122 Cl #122 25 23 14 15 16 CI#116 21 4 Cl #113 Cl #114 Cl #115 17 20 Cl #120 CI 18 Project File: strm 100-2.stm Number of lines: 80 EDt,7171/16/2021 Storm Sewers v2020.40 Storm Sewer Tabulation Page I Station Len Drng Area Rnoff Area x C Tc Rain Total Cap Vel Pipe Invert Elev HGL Elev Grnd / Rim Elev Line ID coeff (1) flow full Line To Incr Total Incr Total Inlet Syst Size Slope Dn Up Dn Up Dn Up Line (ft) (ac) (ac) (C) (min) (min) (in/hr) (cfs) (cfs) (ftls) (in) M (ft) (ft) (ft) (ft) (ft) (ft) I End 118,878 0,19 20,25 0,77 0,15 15.59 10.0 20,3 4.2 66,18 87.06 9,39 42 0,75 841,00 841,89 843,28 844,44 844,83 862,00 101-100 2 1 58.549 0,25 20,06 0,77 0,19 15.45 10.0 20,1 4,3 65,73 77.96 9,30 36 1,37 842,96 843,76 846,31 846,88 862,00 858,00 102-101 3 2 82.040 0,24 3,94 0,77 0,18 3,03 10.0 19.0 4.4 13.29 22,75 4,23 24 1,01 844,76 845,59 848,76 849,04 858,00 855,85 103-102 4 3 119,000 0,36 3,70 0,77 0,28 2.85 10.0 18.6 4.4 12.61 22,62 4,02 24 1,00 845,79 846,98 849,30 849,67 855,85 857,12 104-103 5 4 17.000 0,18 3,34 0,77 0,14 2.57 10.0 18.5 4.4 11.41 22,62 3,63 24 1,00 847,18 847,35 849,84 849,88 857,12 858,73 105-104 6 5 69,000 0,79 3,16 0,77 0,61 2.43 10.0 18.3 4,5 10.84 14.85 6.21 18 2.00 847,85 849,23 849,99 850,64 858,73 858,90 106-105 7 6 92.000 0,60 2.37 0,77 0,46 1,82 10.0 18.1 4,5 8,19 10.50 4,63 18 1,00 849,43 850,35 851,53 852,09 858,90 859,64 107-106 8 7 86.819 0,60 1.77 0,77 0,46 1,36 10.0 17.7 4,5 6.17 10.51 3,75 18 1,00 850,55 851,42 852,40 852,64 859,64 859,90 108-107 9 8 47.046 0,22 1.17 0,77 0,17 0,90 10.0 17.4 4,6 4.11 10.50 3,77 18 1,00 851,62 852,09 852,68 852,87 859,90 860,46 109-108 10 9 60,357 0,80 0,95 0,77 0,62 0,73 10.0 17.0 4,6 3,38 10.56 3,45 18 1,01 852,29 852,90 853,28 853,60 860,46 860,77 110-109 11 10 118,981 0,08 0,15 0,77 0,06 0,12 10.0 11.7 5A 0,63 24,81 1,59 18 5,58 853,10 859,74 853,95 860,03 860,77 868,00 111-110 12 11 26,000 0,07 0,07 0,77 0,05 0,05 10.0 10.0 5,8 0,31 6.46 2.45 15 1,00 859,99 860,25 860,18 860,47 868,00 868,00 112-111 13 2 87.500 0,53 15.87 0,77 0,41 12.22 10.0 19.9 4,3 52.27 66,50 7,40 36 0,99 843,96 844,83 848,76 849,30 858,00 859,00 113-102 14 13 147,000 1,51 15.34 0,77 1,16 11.81 10.0 19.6 4,3 50.98 67,15 7.21 36 1,01 845,03 846,52 849,76 850,62 859,00 859,00 114-113 15 14 66,500 0,53 13.83 0,77 0,41 10.65 10.0 19.4 4,3 46.16 66,95 6.53 36 1,01 846,72 847,39 851,17 851,49 859,00 862,50 115-114 16 15 146,000 0,55 13.30 0,77 0,42 10.24 10.0 19.0 4.4 44.84 66,92 6.34 36 1,01 847,59 849,06 851,86 852,52 862,50 863,50 116-115 17 16 83.429 0,65 12.75 0,77 0,50 9,82 10.0 18.8 4.4 43.17 57.85 8,79 30 1,99 849,56 851,22 852,92 853,84 863,50 862,50 117-116 18 17 85.107 0,30 12.10 0,77 0,23 9,32 10.0 18.7 4.4 41.15 54.26 8,38 30 1,75 851,42 852,91 855,60 856,46 862,50 863,50 118-117 19 18 75.187 0,07 11.80 0,77 0,05 9,09 10.0 18.5 4.4 40.29 63,81 8,21 30 2.42 853,11 854,93 857,00 857,73 863,50 864,25 119-118 20 19 91.286 0,08 11.73 0,77 0,06 9,03 10.0 18.3 4,5 40.24 51.87 8,20 30 1,60 855,13 856,59 858,90 859,78 864,25 867,20 120-119 21 20 61,028 0,03 11.65 0,77 0,02 8,97 10.0 18.2 4,5 40.10 46.07 8,17 30 1,26 856,79 857,56 860,56 861,14 867,20 869,20 121-120 22 21 61.192 0.01 2.17 0,77 0,01 1,67 10.0 16.8 4,6 7,76 7,59 4,39 18 0,52 858,11 858,43 861,51 861,84 869,20 869,21 122-121 1 Project File: strm 100-2.stm Number of lines: 80 Run Date: 11/16/2021 NOTES:Intensity = 57,11 / (Inlet time + 10.70) 1 0.76; Return period =Yrs, 10 c = cir e = ellip b = box Storm Sewers v2020.40 Storm Sewer Tabulation Page 2 Station Len Drng Area Rnoff Area x C Tc Rain Total Cap Vel Pipe Invert Elev HGL Elev Grnd / Rim Elev Line ID coeff (1) flow full Line To Incr Total Incr Total Inlet Syst Size Slope Dn Up Dn Up Dn Up Line (ft) (ac) (ac) (C) (min) (min) (in/hr) (cfs) (cfs) (ftls) (in) M (ft) (ft) (ft) (ft) (ft) (ft) 23 22 74.788 0,13 2.16 0,77 0,10 1,66 10.0 16.5 4.7 7,78 10.52 4,40 18 1,00 858,63 859,38 862,03 862,44 869,21 868,35 123-122 24 23 26,000 0,39 1.77 0,77 0,30 1,36 10.0 10.1 5,7 7,82 10.50 4.42 18 1,00 859,58 859,84 863,11 863,26 868,35 868,35 124-123 25 24 21,000 1,38 1,38 0,77 1,06 1,06 10.0 10.0 5,8 6.12 10.50 3,46 18 1,00 860,04 860,25 863,53 863,60 868,35 868,26 125-124 26 23 116,870 0,08 0,26 0,77 0,06 0,20 10.0 14.4 5,0 1,00 9,50 0,81 15 2.16 859,63 862,16 863,41 863,41 868,35 869,99 126-123 27 26 116,319 0,10 0,18 0,77 0,08 0,14 10.0 11.4 5,5 0,76 6.45 1.74 15 1,00 862,36 863,52 863,42 863,86 869,99 872,23 127-126 28 27 24,347 0,08 0,08 0,77 0,06 0,06 10.0 10.0 5,8 0,35 6.54 1,97 15 1,03 863,72 863,97 864,01 864,20 872,23 872,23 128-127 29 21 39.920 0,04 9,45 0,77 0,03 7,28 10.0 18.1 4,5 32.61 51.52 6.64 30 1,58 857,76 858,39 861,51 861,76 869,20 872,20 129-121 30 29 25,867 0,12 0,12 0,77 0,09 0,09 10.0 10.0 5,8 0,53 6.47 2.86 15 1,01 863,57 863,83 863,81 864,11 872,20 872,12 130-129 31 29 56.387 0,06 9,29 0,77 0,05 7,15 10.0 18.0 4,5 32.18 41.23 6.56 30 1,01 858,59 859,16 862,71 863,05 872,20 873,75 131-129 32 31 51.331 0,05 9,23 0,77 0,04 7.11 10.0 17.8 4,5 32.08 41.28 6.54 30 1,01 859,16 859,68 863,43 863,75 873,75 874,81 132-131 33 32 44.000 0,22 4,66 0,77 0,17 3,59 10.0 16.6 4.7 16.76 22,62 7,31 24 1,00 864,29 864,73 865,57 866,20 874,81 875,17 133-132 34 33 21,906 0,55 4.44 0,77 0,42 3,42 10.0 16.5 4.7 16.00 22,67 5,09 24 1,00 864,93 865,15 867,31 867,42 875,17 875,08 134-133 35 34 70.697 0,20 1.77 0,77 0,15 1,36 10.0 16.2 4.7 6.43 10.52 3,64 18 1,00 865,65 866,36 868,20 868,46 875,08 874,96 135-134 36 35 105,845 0,22 1,57 0,77 0,17 1.21 10.0 15.7 4,8 5,78 10.51 3,30 18 1,00 866,56 867,62 868,76 869,06 874,96 876,07 136-135 37 36 58.411 0,08 1,35 0,77 0,06 1,04 10.0 15.4 4,8 5,02 10.55 3,81 18 1,01 867,82 868,41 869,30 869,27 876,07 877,32 137-136 38 37 63,419 0,22 1.27 0,77 0,17 0,98 10.0 15.1 4,9 4.77 10.55 3,98 18 1,01 868,61 869,25 869,76 870,09 877,32 877,21 138-137 39 38 128,717 0,03 0,22 0,77 0,02 0,17 10.0 12.3 5,3 0,90 6.46 1,88 15 1,00 869,50 870,79 870,56 871,16 877,21 878,48 139-138 40 39 40.747 0,04 0,19 0,77 0,03 0,15 10.0 11.3 5,5 0,80 6.48 2.94 15 1,01 870,99 871,40 871,33 871,75 878,48 878,53 140-139 41 40 43.199 0,15 0,15 0,77 0,12 0,12 10.0 10.0 5,8 0,66 6.44 2.79 15 1,00 871,60 872,03 871,90 872,35 878,53 878,47 141-140 42 38 83.530 0,13 0,83 0,77 0,10 0,64 10.0 14.4 5,0 3,18 5,38 3,61 15 0,69 869,50 870,08 870,56 870,80 877,21 878,27 142-138 43 42 46.862 0,14 0,70 0,77 0,11 0,54 10.0 14.1 5,0 2.70 6.60 3,44 15 1,05 870,28 870,77 871,21 871,43 878,27 879,12 143-142 44 43 75.803 0,02 0,21 0,77 0,02 0,16 10.0 12.4 5,3 0,86 6.47 1,95 15 1,00 870,97 871,73 871,79 872,09 879,12 878,74 144-143 1 Project File: strm 100-2.stm Number of lines: 80 Run Date: 11/16/2021 NOTES:Intensity = 57,11 / (Inlet time + 10.70) 1 0.76; Return period =Yrs, 10 c = cir e = ellip b = box Storm Sewers v2020.40 Storm Sewer Tabulation Page 3 Station Len Drng Area Rnoff Area x C Tc Rain Total Cap Vel Pipe Invert Elev HGL Elev Grnd / Rim Elev Line ID coeff (1) flow full Line To Incr Total Incr Total Inlet Syst Size Slope Dn Up Dn Up Dn Up Line (ft) (ac) (ac) (C) (min) (min) (in/hr) (cfs) (cfs) (ftls) (in) M (ft) (ft) (ft) (ft) (ft) (ft) 45 44 37.783 0,04 0,19 0,77 0,03 0,15 10.0 11.5 5,5 0,80 6.48 2.25 15 1,01 871,73 872,11 872,25 872,46 878,74 878,40 145-144 46 45 48.236 0,15 0,15 0,77 0,12 0,12 10.0 10.0 5,8 0,66 6.44 2.81 15 1,00 872,31 872,79 872,61 873,11 878,40 878,44 146-145 47 43 35.240 0,22 0,35 0,77 0,17 0,27 10.0 12.9 5,2 1,40 8,84 2.50 15 1,87 870,97 871,63 871,79 872,10 879,12 879,26 147-143 48 47 81.777 0,13 0,13 0,77 0,10 0,10 10.0 10.0 5,8 0,58 6.47 1,95 15 1,00 871,83 872,65 872,32 872,95 879,26 880,10 148-147 49 34 127,388 0,16 2.12 0,77 0,12 1,63 10.0 12.4 5,3 8,65 20,04 2.75 24 0,79 865,35 866,35 868,29 868,47 875,08 877,00 149-134 50 49 57.670 0,13 0,50 0,77 0,10 0,39 10.0 11.8 5A 2.08 6.48 4.24 15 1,01 870,10 870,68 870,59 871,25 877,00 877,00 150-149 51 50 58.330 0,13 0,37 0,77 0,10 0,28 10.0 11.1 5,5 1,58 6.49 2.92 15 1,01 870,88 871,47 871,54 871,97 877,00 877,00 151-150 52 51 57.670 0,24 0,24 0,77 0,18 0,18 10.0 10.0 5,8 1,06 6.48 2.60 15 1,01 871,67 872,25 872,20 872,66 877,00 877,50 152-151 53 49 100,000 0,32 1,46 0,77 0,25 1.12 10.0 11.0 5,6 6.24 10.50 4,09 18 1,00 866,85 867,85 868,64 868,92 877,00 877,50 153-149 54 53 57.671 0,27 1.14 0,77 0,21 0,88 10.0 10.8 5,6 4,92 6.48 4,68 15 1,01 868,10 868,68 869,26 869,58 877,50 877,50 154-153 55 54 58.330 0,27 0,87 0,77 0,21 0,67 10.0 10.4 5,7 3,79 6.49 3,58 15 1,01 868,88 869,47 870,23 870,36 877,50 877,50 155-154 56 55 57.670 0,60 0,60 0,77 0,46 0,46 10.0 10.0 5,8 2.66 6.48 3,43 15 1,01 869,67 870,25 870,59 870,90 877,50 877,50 156-155 57 32 64,538 0,19 4,52 0,77 0,15 3,48 10.0 17.6 4,5 15.80 22,70 5,03 24 1,01 860,18 860,83 865,01 865,33 874,81 875,83 157-132 58 57 277.167 0,07 4,33 0,77 0,05 3,33 10.0 16.7 4.7 15.51 22,69 4,94 24 1,01 861,03 863,82 865,54 866,84 875,83 878,03 158-157 59 58 137,014 0,17 4,26 0,77 0,13 3,28 10.0 16.3 4.7 15.45 22,70 4,92 24 1,01 864,02 865,40 867,04 867,67 878,03 876,15 159-158 60 59 44.000 0,20 0,51 0,77 0,15 0,39 10.0 10.3 5,7 2.23 6.46 3,02 15 1,00 867,85 868,29 868,82 868,89 876,15 876,52 160-159 61 60 21,000 0,31 0,31 0,77 0,24 0,24 10.0 10.0 5,8 1,37 6.46 2.63 15 1,00 868,49 868,70 869,19 869,16 876,52 877,24 161-160 62 59 152,371 0,06 3,58 0,77 0,05 2.76 10.0 15.7 4,8 13.20 22,59 4.21 24 1,00 865,60 867,12 868,60 869,09 876,15 876,41 162-159 63 62 16.659 0,12 0,12 0,77 0,09 0,09 10.0 10.0 5,8 0,53 6.52 2.87 15 1,02 870,00 870,17 870,24 870,45 876,41 876,10 163-162 64 62 26,000 0,21 1,54 0,77 0,16 1,19 10.0 11.5 5,5 6.47 10.50 3,66 18 1,00 867,62 867,88 869,58 869,68 876,41 876,41 164-162 65 64 24,000 0,28 1,33 0,77 0,22 1,02 10.0 11.4 5,5 5,61 10.50 3,18 18 1,00 868,08 868,32 869,84 869,91 876,41 877,50 165-164 66 65 48.558 0.45 1,05 0,77 0,35 0,81 10.0 11.2 5,5 4,46 6.49 3,64 15 1,01 868,57 869,06 870.14 870.37 877,50 876,83 166-165 Project File: strm 100-2.stm Number of lines: 80 Run Date: 11/16/2021 NOTES:Intensity = 57,11 / (Inlet time + 10.70) 1 0.76; Return period =Yrs, 10 c = cir e = ellip b = box Storm Sewers v2020.40 Storm Sewer Tabulation Page 4 Station Len Drng Area Rnoff Area x C Tc Rain Total Cap Vel Pipe Invert Elev HGL Elev Grnd / Rim Elev Line ID coeff (1) flow full Line To Incr Total Incr Total Inlet Syst Size Slope Dn Up Dn Up Dn Up Line (ft) (ac) (ac) (C) (min) (min) (in/hr) (cfs) (cfs) (ftls) (in) M (ft) (ft) (ft) (ft) (ft) (ft) 67 66 87.148 0,30 0,60 0,77 0,23 0,46 10.0 10.5 5,7 2.61 6.45 3,09 15 1,00 869,25 870,12 870,62 870,77 876,83 879,14 167-166 68 67 32.189 0,30 0,30 0,77 0,23 0,23 10.0 10.0 5,8 1,33 6.44 2.46 15 0,99 870,32 870,64 871,11 871,10 879,14 879,97 168-167 69 62 124,826 0,07 1,86 0,77 0,05 1,43 10.0 15.2 4,9 6.96 10.51 4,01 18 1,00 867,41 868,66 869,55 870,04 876,41 877,48 169-162 70 69 26,090 0,05 0,05 0,77 0,04 0,04 10.0 10.0 5,8 0,22 6.45 0,18 15 1,00 869,02 869,28 870,74 870,74 877,48 877,48 170-169 71 69 84.021 0,06 1.74 0,77 0,05 1,34 10.0 14.9 4,9 6.57 10.50 4,34 18 1,00 868,86 869,70 870,52 870,75 877,48 878,43 171-169 72 71 27,481 0,20 0,20 0,77 0,15 0,15 10.0 10.0 5,8 0,89 6.52 0,79 15 1,02 869,95 870,23 871,22 871,22 878,43 878,36 172-171 73 71 99.485 0,07 1,48 0,77 0,05 1.14 10.0 14.5 5,0 5,65 7,88 5,09 15 1,49 869,95 871,43 871,22 872,39 878,43 881,93 173-171 74 73 38.000 0,16 1.41 0,77 0,12 1,09 10.0 14.4 5,0 5,40 6.46 4,40 15 1,00 871,63 872,01 873,17 873,43 881,93 881,70 174-173 75 74 61,399 0,19 1,25 0,77 0,15 0,96 10.0 14.1 5,0 4,82 6.44 4,05 15 0,99 872,21 872,82 873,65 873,94 881,70 880,40 175-174 76 75 84.981 0,24 1,06 0,77 0,18 0,82 10.0 13.8 5,1 4.14 6.46 4,28 15 1,00 873,02 873,87 874,08 874,69 880,40 880,08 176-175 77 76 16.330 0,16 0,16 0,77 0,12 0,12 10.0 10.0 5,8 0,71 6.59 3,13 15 1,04 875,36 875,53 875,64 875,86 880,08 879,78 177-176 78 76 49.000 0,11 0,66 0,77 0,08 0,51 10.0 13.4 5,1 2.61 6.46 3,13 15 1,00 874,07 874,56 875,23 875,21 880,08 880,60 178-176 79 78 73.500 0,43 0,55 0,77 0,33 0,42 10.0 12.8 5,2 2.22 6.48 3,28 15 1,01 874,76 875,50 875,55 876,09 880,60 881,75 179-178 80 79 72.409 0,12 0,12 0,77 0,09 0,09 10.0 10.0 5,8 0,53 6.44 1,65 15 0,99 875,70 876,42 876,40 876,70 881,75 880,10 180-179 Project File: strm 100-2.stm Number of lines: 80 Run Date: 11/16/2021 NOTES:Intensity = 57,11 / (Inlet time + 10.70) 1 0.76; Return period =Yrs, 10 c = cir e = ellip b = box Storm Sewers v2020.40 Hydraulic Grade Line Computations Page I Line Size Q Downstream Len Upstream Check JL Minor coeff loss Invert HGL Depth Area Vel Val EGL Sf Invert HGL Depth Area Vel Val EGL Sf Ave Enrgy elev elev head elev elev elev head elev Sf loss (in) (cfS) (ft) (ft) (ft) (sqft) (ft1s) (ft) (ft) M (ft) (ft) (ft) (ft) (sqft) (ft1s) (ft) (ft) N N (ft) (K) (ft) 1 42 66,18 841,00 843,28 2.28 6.65 9,95 1.21 844,49 n1a 118,87 841,89 844,44 2.55** 7,50 8,82 1.21 845,65i n1a n1a n1a 0,50 n1a 2 36 65,73 842,96 846,31 3,00 7,07 9,30 1,35 847,66 n1a 58.549 843,76 846,88 3,00 7,07 9,30 1,34 848,23i n1a n1a -0.776 1,90 n1a 3 24 13.29 844,76 848,76 2.00 3,14 4,23 0,28 849,04 0,345 82.040 845,59 849,04 2.00 3,14 4,23 0,28 849,32 0,345 0,345 0,283 0,83 0,23 4 24 12.61 845,79 849,30 2.00 3,14 4,02 0,25 849,55 0,311 119,00)846,98 849,67 2.00 3,14 4,02 0,25 849,92 0,311 0,311 0,370 0,50 0,13 5 24 11.41 847,18 849,84 2.00 3,14 3,63 0,21 850,05 0,254 17.000 847,35 849,88 2.00 3,14 3,63 0,20 850,09 0,254 0,254 0,043 0,50 0,10 6 18 10.84 847,85 849,99 1,50 1.77 6.13 0,58 850,57 n1a 69,000 849,23 850,64 1.41 1,73 6.28 0,61 851,26i n1a n1a 0,072 0,50 n1a 7 18 8,19 849,43 851,53 1,50 1.77 4,63 0,33 851,86 0,608 92.000 850,35 852,09 1,50 1.77 4,63 0,33 852,42 0,608 0,608 0,559 0,50 0,17 8 18 6.17 850,55 852,40 1,50 1.77 3,49 0,19 852,59 n/a 86.819 851,42 852,64 1.22 1,54 4,00 0,25 852,89i n/a n/a 0,053 1,03 n/a 9 18 4.11 851,62 852,68 1,06 0,92 3,08 0,31 852,99 n/a 47.046 852,09 852.87 j 0,78-- 0,92 4,46 0,31 853,17i n/a n/a n1a 0,90 n/a 10 18 3,38 852,29 853,28 0,99 0,81 2.73 0,27 853,55 n1a 60,357 852,90 853.60 j 0,70" 0,81 4.17 0,27 853,87i n1a n1a n1a 1,00 n1a 11 18 0,63 853,10 853,95 0,85 0,24 0,60 0,10 854,06 n1a 118,98 859,74 860.03 j 0,29" 0,24 2.57 0,10 860,14i n1a n1a n1a 0,86 n1a 12 15 0,31 859,99 860,18 0,19* 0,11 2.71 0,08 860,25 n/a 26,000 860,25 860,47 0,22** 0,14 2.20 0,08 860,54i n/a n/a n1a 1,00 n/a 13 36 52.27 843,96 848,76 3,00 7,07 7,40 0,85 849,61 0,615 87.500 844,83 849,30 3,00 7,07 7,40 0,85 850,15 0,614 0,614 0,538 0,50 0,43 14 36 50.98 845,03 849,76 3,00 7,07 7.21 0,81 850,57 0,584 147,00)846,52 850,62 3,00 7,07 7.21 0,81 851,43 0,584 0,584 0,859 0,50 0,40 15 36 46.16 846,72 851,17 3,00 7,07 6.53 0,66 851,83 0,479 66,500 847,39 851,49 3,00 7,07 6.53 0,66 852,15 0,479 0,479 0,319 0,50 0,33 16 36 44.84 847,59 851,86 3,00 7,07 6.35 0,63 852,48 0,452 146,00)849,06 852,52 3,00 7,07 6.34 0,63 853,14 0,452 0,452 0,660 0,64 0,40 17 30 43.17 849,56 852,92 2.50 4,91 8,80 1,20 854,12 n/a 83.429 851,22 853,84 2.50 4,91 8,79 1,20 855,05i n/a n/a -0.278 0,50 n/a 18 30 41.15 851,42 855,60 2.50 4,91 8,38 1,09 856,69 n/a 85.107 852,91 856,46 2.50 4,91 8,38 1,09 857,55i n/a n/a -0.236 0,50 n/a 19 30 40.29 853,11 857,00 2.50 4,91 8,21 1,05 858,05 n1a 75.187 854,93 857,73 2.50 4,91 8,21 1,05 858,78i n1a n1a -0.322 1.14 n1a 20 30 40.24 855,13 858,90 2.50 4,91 8,20 1,05 859,95 n1a 91.286 856,59 859,78 2.50 4,91 8,20 1,05 860,83i n1a n1a -0.166 0,50 n1a 21 30 40.10 856,79 860,56 2.50 4,91 8,17 1,04 861,60 n/a 61,028 857,56 861,14 2.50 4,91 8,17 1,04 862,18i n/a n/a -0.454 1,36 n/a 22 18 7,76 858,11 861,51 1,50 1.77 4,39 0,30 861,81 0,546 61.192 858.43 861,84 1,50 1.77 4,39 0,30 862,14 0,546 0,546 0,334 0,61 0,18 Project File: strm 100-2.stm - - Number of lines: 80 Run Date: 11/16/2021 Notes: * Normal depth assumed; ** Critical depth.; j-Line contains hyd. jump c = cir e = ellip b = box Storm Sewers v202O.40 Hydraulic Grade Line Computations Page 2 Line Size Q Downstream Len Upstream Check JL Minor coeff loss Invert HGL Depth Area Vel Val EGL Sf Invert HGL Depth Area Vel Val EGL Sf Ave Enrgy elev elev head elev elev elev head elev Sf loss (in) (cfS) (ft) (ft) (ft) (sqft) (ft1s) (ft) (ft) M (ft) (ft) (ft) (ft) (sqft) (ft1s) (ft) (ft) N N (ft) (K) (ft) 23 18 7,78 858,63 862,03 1,50 1.77 4,40 0,30 862,33 0,549 74.788 859,38 862,44 1,50 1.77 4,40 0,30 862,74 0,548 0,549 0,410 2.25 0,68 24 18 7,82 859,58 863,11 1,50 1.77 4.42 0,30 863,42 0,554 26,000 859,84 863,26 1,50 1.77 4.42 0,30 863,56 0,554 0,554 0,144 0,50 0,15 25 18 6.12 860,04 863,53 1,50 1.77 3,46 0,19 863,71 0,339 21,000 860,25 863,60 1,50 1.77 3,46 0,19 863,79 0,339 0,339 0,071 1,00 0,19 26 15 1,00 859,63 863,41 1,25 1,23 0,81 0,01 863,42 0,024 116,87)862,16 863,41 1,25 1,23 0,81 0,01 863,42 0,024 0,024 0,028 0,80 0,01 27 15 0,76 862,36 863,42 1,06 0,27 0,68 0,12 863,54 n1a 116,31 )863,52 863.86 j 0,34" 0,27 2.80 0,12 863,98i n1a n1a n1a 1,50 n1a 28 15 0,35 863,72 864,01 0,29 0,16 1,66 0,08 864,09 n1a 24,347 863,97 864.20 j 0,23" 0,16 2.28 0,08 864,28i n1a n1a n1a 1,00 n1a 29 30 32.61 857,76 861,51 2.50 4,91 6.65 0,69 862,20 0,633 39.920 858,39 861,76 2.50 4,91 6.64 0,69 862,45 0,632 0,633 0,252 1,35 0,93 30 15 0,53 863,57 863,81 0,24* 0,17 3,18 0,10 863,91 n/a 25,867 863,83 864,11 0,28** 0,21 2.54 0,10 864,21 i n/a n/a n1a 1,00 n/a 31 30 32.18 858,59 862,71 2.50 4,91 6.56 0,67 863,37 0,616 56.387 859,16 863,05 2.50 4,91 6.56 0,67 863,72 0,616 0,616 0,347 0,56 0,37 32 30 32.08 859,16 863,43 2.50 4,91 6.54 0,66 864,10 0,612 51.331 859,68 863,75 2.50 4,91 6.54 0,66 864,41 0,612 0,612 0,314 1,50 1,00 33 24 16.76 864,29 865,57 1,28* 2.13 7,88 0,71 866,28 n1a 44.000 864,73 866,20 1.47** 2.48 6.75 0,71 866,91 i n1a n1a n1a 0,50 n1a 34 24 16.00 864,93 867,31 2.00 3,14 5,09 0,40 867,71 0,500 21,906 865,15 867,42 2.00 3,14 5,09 0,40 867,82 0,500 0,500 0,110 1.44 0,58 35 18 6.43 865,65 868,20 1,50 1.77 3,64 0,21 868,40 0,375 70.697 866,36 868,46 1,50 1.77 3,64 0,21 868,67 0,375 0,375 0,265 1.27 0,26 36 18 5,78 866,56 868,76 1,50 1.77 3,27 0,17 868,93 0,303 105,84 5867,62 869,06 1.44 1.74 3,32 0,17 869,23 0,264 0,284 0,300 1,16 0,20 37 18 5,02 867,82 869,30 1,48 1,05 2.84 0,36 869,66 n1a 58.411 868,41 869.27 j 0,86- 1,05 4,78 0,36 869,63i n1a n1a n1a 0,91 n1a 38 18 4.77 868,61 869,76 1,15 1,02 3,27 0,34 870,11 n/a 63,419 869,25 870.09 j 0,84- 1,02 4,69 0,34 870,43i n/a n/a n1a 1,92 n/a 39 15 0,90 869,50 870,56 1,06 0,31 0,81 0,13 870,69 n/a 128,71 ?870,79 871.16 j 0,37- 0,31 2.94 0,13 871,30i n/a n/a n1a 0,97 n/a 40 15 0,80 870,99 871,33 0,34 0,27 3,03 0,13 871,45 n/a 40.747 871,40 871,75 0,35** 0,28 2.85 0,13 871,88i n/a n/a n1a 1,43 n/a 41 15 0,66 871,60 871,90 0,30 0,23 2.89 0,11 872,02 n1a 43.199 872,03 872,35 0,32** 0,25 2.70 0,11 872,46i n1a n1a n1a 1,00 n1a 42 15 3,18 869,50 870,56 1,06 0,73 2.86 0,30 870,86 n1a 83.530 870,08 870,80 0,72** 0,73 4,36 0,30 871,09i n1a n1a n1a 1,03 n1a 43 15 2.70 870,28 871,21 0,93 0,66 2.77 0,26 871,47 n/a 46.862 870,77 871.43 j 0,66- 0,66 4.12 0,26 871,69i n/a n/a n1a 1,48 n/a 44 15 0,86 870,97 871,79 0,82 0,30 1,01 0,13 871,92 n/a 75.803 871,73 872.09 j 0,36- 0,30 2.90 0,13 872,22i n/a n/a n1a 0,50 n/a Project File: strm 100-2.stm - - Number of lines: 80 Run Date: 11/16/2021 Notes: * Normal depth assumed; ** Critical depth.; j-Line contains hyd. jump c = cir e = ellip b = box Storm Sewers v202O.40 Hydraulic Grade Line Computations Page 3 Line Size Q Downstream Len Upstream Check JL Minor coeff loss Invert HGL Depth Area Vel Val EGL Sf Invert HGL Depth Area Vel Val EGL Sf Ave Enrgy elev elev head elev elev elev head elev Sf loss (in) (cfS) (ft) (ft) (ft) (sqft) (ft1s) (ft) (ft) M (ft) (ft) (ft) (ft) (sqft) (ft1s) (ft) (ft) N N (ft) (K) (ft) 45 15 0,80 871,73 872,25 0,52 0,28 1,65 0,13 872,38 n1a 37.783 872,11 872.46 j 0,35" 0,28 2.84 0,13 872,59i n1a n1a n1a 1.47 n1a 46 15 0,66 872,31 872,61 0,30 0,23 2.91 0,11 872,72 n1a 48.236 872,79 873,11 0,32** 0,25 2.70 0,11 873,22i n1a n1a n1a 1,00 n1a 47 15 1,40 870,97 871,79 0,82 0,42 1,65 0,17 871,96 n/a 35.240 871,63 872.10 j 0,47-- 0,42 3,34 0,17 872,27i n/a n/a n1a 0,73 n/a 48 15 0,58 871,83 872,32 0,49 0,22 1,30 0,10 872,42 n/a 81.777 872,65 872.95 j 0,30-- 0,22 2.60 0,10 873,05i n/a n/a n1a 1,00 n/a 49 24 8,65 865,35 868,29 2.00 3,14 2.75 0,12 868,40 0,146 127,38 866,35 868,47 2.00 3,14 2.75 0,12 868,59 0,146 0,146 0,186 1,43 0,17 50 15 2.08 870,10 870,59 0,49* 0,44 4,70 0,22 870,81 n1a 57.670 870,68 871,25 0,57** 0,55 3,78 0,22 871,48i n1a n1a n1a 0,50 n1a 51 15 1,58 870,88 871,54 0,66 0,46 2.38 0,19 871,73 n/a 58.330 871,47 871.97 j 0,50-- 0,46 3,46 0,19 872,15i n/a n/a n1a 0,50 n/a 52 15 1,06 871,67 872,20 0,53 0,35 2.13 0,15 872,35 n/a 57.670 872,25 872.66 j 0,41-- 0,34 3,08 0,15 872,80i n/a n/a n1a 1,00 n/a 53 18 6.24 866,85 868,64 1,50 1.77 3,53 0,19 868,83 n/a 100,00)867,85 868,92 1,07 1,34 4,65 0,34 869,25i n/a n/a 0,082 1,50 n/a 54 15 4,92 868,10 869,26 1,16 0,94 4,15 0,42 869,68 n1a 57.671 868,68 869.58 j 0,90" 0,94 5,21 0,42 870,00i n1a n1a n1a 0,50 n1a 55 15 3,79 868,88 870,23 1,25 1,23 3,09 0,15 870,38 n1a 58.330 869,47 870,36 0,89 0,93 4,08 0,26 870,61 i n1a n1a -0.019 0,50 n1a 56 15 2.66 869,67 870,59 0,92 0,65 2.76 0,26 870,85 n/a 57.670 870,25 870.90 j 0,65-- 0,65 4,10 0,26 871,16i n/a n/a n1a 1,00 n/a 57 24 15.80 860,18 865,01 2.00 3,14 5,03 0,39 865,41 0,488 64,538 860,83 865,33 2.00 3,14 5,03 0,39 865,72 0,488 0,488 0,315 0,50 0,20 58 24 15.51 861,03 865,54 2.00 3,14 4,94 0,38 865,92 0,470 277.16'7863,82 866,84 2.00 3,14 4,94 0,38 867,22 0,470 0,470 1,304 0,50 0,19 59 24 15.45 864,02 867,04 2.00 3,14 4,92 0,38 867,41 0,467 137,014865,40 867,67 2.00 3,14 4,92 0,38 868,05 0,467 0,467 0,639 2.19 0,82 60 15 2.23 867,85 868,82 0,97 0,58 2.18 0,23 869,06 n/a 44.000 868,29 868.89 j 0,60-- 0,58 3,86 0,23 869,12i n/a n/a n1a 0,50 n/a 61 15 1,37 868,49 869,19 0,70 0,41 1,93 0,17 869,36 n/a 21,000 868,70 869.16 j 0,46-- 0,41 3,32 0,17 869,33i n/a n/a n1a 1,00 n/a 62 24 13.20 865,60 868,60 2.00 3,14 4,20 0,27 868,87 0,341 152,37 867,12 869,09 1,97 3,13 4.21 0,28 869,37 0,311 0,326 0,496 1,53 0,42 63 15 0,53 870,00 870,24 0,24* 0,17 3,20 0,10 870,34 n1a 16.659 870,17 870,45 0,28** 0,21 2.54 0,10 870,55i n1a n1a n1a 1,00 n1a 64 18 6.47 867,62 869,58 1,50 1.77 3,66 0,21 869,79 0,380 26,000 867,88 869,68 1,50 1.77 3,66 0,21 869,89 0,380 0,380 0,099 0,50 0,10 65 18 5,61 868,08 869,84 1,50 1.77 3,18 0,16 870,00 0,286 24,000 868,32 869,91 1,50 1.77 3,18 0,16 870,06 0,286 0,286 0,069 1,49 0,23 66 15 4,46 868,57 870,14 1,25 1,23 3,64 0,21 870,35 0,478 48.558 869.06 870,37 1,25 1,23 3,64 0,21 870,58 0,478 0,478 0,232 0,53 0,11 Project File: strm 100-2.stm - - Number of lines: 80 Run Date: 11/16/2021 Notes: * Normal depth assumed; ** Critical depth.; j-Line contains hyd. jump c = cir e = ellip b = box Storm Sewers v202O.40 Hydraulic Grade Line Computations Page 4 Line Size Q Downstream Len Upstream Check JL Minor coeff loss Invert HGL Depth Area Vel Val EGL Sf Invert HGL Depth Area Vel Val EGL Sf Ave Enrgy elev elev head elev elev elev head elev Sf loss (in) (cfS) (ft) (ft) (ft) (sqft) (ft1s) (ft) (ft) M (ft) (ft) (ft) (ft) (sqft) (ft1s) (ft) (ft) N N (ft) (K) (ft) 67 15 2.61 869,25 870,62 1,25 0,64 2.13 0,07 870,69 n1a 87.148 870,12 870.77 j 0,65" 0,65 4,05 0,25 871,03i n1a n1a 0,083 0,50 n1a 68 15 1,33 870,32 871,11 0,79 0,40 1,63 0,17 871,28 n1a 32.189 870,64 871.10 j 0,46" 0,40 3,29 0,17 871,26i n1a n1a n1a 1,00 n1a 69 18 6.96 867,41 869,55 1,50 1.77 3,94 0,24 869,79 0,439 124,82 868,66 870,04 1,38 1,70 4,08 0,26 870,30 0,380 0,410 0,511 1,68 0,43 70 15 0,22 869,02 870,74 1,25 1,23 0,18 0,00 870,74 0,001 26,090 869,28 870,74 1,25 1,23 0,18 0,00 870,74 0,001 0,001 0,000 1,00 0,00 71 18 6.57 868,86 870,52 1,50 1.77 3,72 0,22 870,74 n1a 84.021 869,70 870,75 1,05 1,33 4,96 0,38 871,14i n1a n1a 0,016 1,50 n1a 72 15 0,89 869,95 871,22 1,25 1,23 0,72 0,01 871,23 0,019 27,481 870,23 871,22 0,99 1,04 0,85 0,01 871,23 0,020 0,019 0,005 1,00 0,01 73 15 5,65 869,95 871,22 1,25 1,01 4,60 0,33 871,55 n/a 99.485 871,43 872.39 j 0,96-- 1,01 5,57 0,48 872,87i n/a n/a n1a 1,50 n/a 74 15 5,40 871,63 873,17 1,25 1,23 4,40 0,30 873,47 0,700 38.000 872,01 873,43 1,25 1,23 4,40 0,30 873,73 0,700 0,700 0,266 0,50 0,15 75 15 4,82 872,21 873,65 1,25 1,23 3,93 0,24 873,89 n/a 61,399 872,82 873,94 1.12 1,16 4,16 0,27 874,21 i n/a n/a 0,054 0,50 n/a 76 15 4.14 873,02 874,08 1,06 0,86 3,73 0,36 874,44 n1a 84.981 873,87 874.69 j 0,82" 0,86 4,83 0,36 875,06i n1a n1a n1a 1,50 n1a 77 15 0,71 875,36 875,64 0,28* 0,20 3,50 0,12 875,75 n1a 16.330 875,53 875,86 0,33** 0,26 2.75 0,12 875,98i n1a n1a n1a 1,00 n1a 78 15 2.61 874,07 875,23 1,16 0,64 2.20 0,26 875,48 n/a 49.000 874,56 875.21 j 0,65-- 0,64 4,07 0,26 875,46i n/a n/a n1a 0,50 n/a 79 15 2.22 874,76 875,55 0,79 0,57 2.70 0,23 875,78 n/a 73.500 875,50 876.09 j 0,59-- 0,57 3,85 0,23 876,32i n/a n/a n1a 0,60 n/a 80 15 0,53 875,70 876,40 0,70 0,21 0,75 0,10 876,50 n1a 72.409 876,42 876.70 j 0,28" 0,21 2.54 0,10 876,80i n1a n1a n1a 1,00 n1a Project File: strm 100-2.stm Number of lines: 80 -Run Date: 11/16/2021 Notes: * Normal depth assumed; ** Critical depth.; j-Line contains hyd. jump c = cir e = ellip b = box Storm Sewers v202O.40 Book 3573 Page 1933 Rev. $ Parcel Identifier/Tax Account/PIN No. Brief Description for the Index: Prepared by and return to: FORSYTH CO. NC FEE $26.00 NO TAXABLE CONSIDERATION PRESENTED & RECORDED 12/15/2020 01:32:10 PM LYNNE JOHNSON REGISTER OF DEEDS BY: OLIVIA DOYLE ASST BK: RE 3573 PG: 1933 -1936 (For Recording Data) 5896-55-6034 26.49 acre tract, Eugenia L. Sheets Heirs RAGSDALE LIGGETT, PLLC (RAMSEUR) without the benefit of title examination NORTH CAROLINA QUITCLAIM DEED This Quitclaim Deed (the "Deed") is made as of the day of December, 2020, by and between JCS PROPERTIES NORTH LLC, a North Carolina limited liability company, with a mailing address of 104 Summit Wood Court, Holly Springs, North Carolina 27540 ("Grantor"); and WEST EDGE — ADAMS, LLC, a South Carolina limited liability company, with a mailing address of P.O. Box 20850, Charleston, South Carolina 29413 ("Grantee"). For valuable consideration paid by Grantee to Grantor, the receipt and sufficiency of which are hereby acknowledged, Grantor has and by these presents does hereby grant, bargain, sell and convey unto Grantee in fee simple all of that certain lot or parcel of land located in or near the City of Winston-Salem, Vienna Township, Forsyth County, North Carolina (the "Premises") and more particularly described in Exhibit "A" which is attached hereto and incorporated herein by reference for a more complete and accurate description. Grantor herein states that the Premises conveyed herein is not the primary residence of the Grantor. The sole purpose of this Deed is to record Grantee's new survey legal description of the property hereinabove described. Grantor makes no warranty, express or implied, as to the accuracy or title of the aforcineritioned survey or description. TO HAVE AND TO HOLD the Premises and all privileges and appurtenances thereto belonging to Grantee in fee simple absolute, submitted electronically by "Blanco Tackabery & Matamoros, P.A." in compliance with North Carolina statutes governing recordable documents and the terms of the submitter agreement with the Forsyth county Register of Deeds. Book 3573 Page 1934 GRANTOR makes no warranties, either express or implied as to the title of the Premises conveyed herein. The designation of Grantor and Grantee as used in this Deed includes the parties expressly named herein, their heirs, successors, and assigns and shall include the singular, plural, masculine, feminine or neuter as required by context. IN WITNESS WHEREOF, Grantor has caused this Deed to be duly executed under seal as of the day and year first written above. [Signature and Notary Acknowledgement on following page.] Book 3573 Page 1935 North Carolina Quitclaim Deed Signature and Notary Acknowledgment Page Page 3 STATE OF NORTH CAROLINA COUNTY OF W.*Vk JCS PROPERTIES NORTH LLC, a North Carolina limited liability company (SEAL) By: DAVID L. SHEET Its: Managing Member I, a Notary Public of the County and State aforesaid, certify that the following person(s) personally appeared before me this day, each acknowledging that he or she voluntarily signed the foregoing document for the purpose stated therein and in the capacity indicated: DAVID L. SHEETS, as the Managing Member of JCS PROPERTIES NORTH LLC, a North Carolina limited liability company Date: December �Z) , 2020 (SEAL) �01vim;: Printed Nat - Notary Pub cG My commis; y V A G co��'.••. otary: ires: kZ,* �ck • 7,'6qL1 Book 3573 Page 1936 EXHIBIT A 5220 Robinhood Road BEGINNING at an existing iron pin being located in the southwestern right of way line of Robinhood Road, said pin also being in the northeastern corner of property owned, now or formerly, by William and Susan Loggins (DB 1385, PG 1066); thence South 64 degrees 18 minutes 55 seconds East 300.92 feet to an existing iron pin in the intersection of Robinhood Road and Meadowlark Drive; Thence South 30 degrees 50 minutes 07 seconds East 107.21 feet to an existing iron pin in the western right of way line of Meadowlark Drive; thence on a curve to the left having a radius of 183.24 feet, an are length of 189.81 feet and a chord bearing and distance of South 21 degrees 50 minutes 23 seconds East 181.44 feet to an existing iron pin in said right of way line of Meadowlark Drive; Thence South 51 degrees 30 minutes 56 seconds East 209.77 feet to an existing iron pin in the northwest corner of property owned, now or formerly, by Meadowlark Developers LLC (DB 3340, PG 375); thence South 39 degrees 45 minutes 30 seconds West 960.87 feet to an existing iron pipe in the property line of Meadowlark Developers LLC (DB 3340, PG 375); thence North 85 degrees 06 minutes 23 seconds West 399.82 feet to an existing iron pin located in the eastern property line of Charles and Tanya Sellars, now or formerly, (DB 3292, PG 3359); thence North 00 degrees 56 minutes 02 seconds East 375.16 feet to an existing iron pin in the northeastern corner of property owned, now or formerly, by James and Jan Starman (DB 3430, PG 984) thence North 88 degrees 01 minute 10 seconds West 840.95 feet to a stone corner in the property line of Juanita Fay Matherly, now or formerly (DB 2940, Page 3798); thence North 00 degrees 51 minutes 03 seconds East 401.26 feet to an existing iron pin in the property line of Joseph Stanco, now or formerly (DB 3009, PG 326); thence South 87 degrees 44 minutes 43 seconds East 461.00 feet to an existing iron pin being located in the south east corner of property owned, now or formerly, by Robin Hood Baptist Church (DB 602, PG 288); thence South 87 degrees 48 minutes 51 seconds East 362.04 feet to an existing iron pin in the property line, now or formerly, owned by Billie Moses and Susan Loggins (DB 3078, Page 492); thence North 45 degrees 31 minutes 48 seconds East 646.01 feet to the POINT AND PLACE OF BEGINNING, and containing 26.310 acres more or less as shown on a survey entitled "ALTA/NSPS Survey Adams Property Group, LLC 5220, 5264 & 5284 Robinhood Rd." drawn by Sgroi Land Surveying, PLLC, dated July 7, 2020. BTM:803570v4 • I./eh �, Wall to Saeen Services Wea � Retail ! Restaurant Full Movemen vl, �rSize: 4.200 SF +1- eo �,. sy�� ,Q a{� - .. .... p 9'MonuRlen[ Retail! Restaurant Footprint: 60'x 70' '"Sign age Commercla� Size 7200 SF+h r} _ Parking Required: Based on AklacaGon Footprint 80' x 120' a ere.- �` Parking Provided: 36 spaces +1- r�� i- Parking Required: Based on AlkoraGon Fw +1 45 d id P ki �Parng rove: spaces -� "r a ?t,- .� a. � - � ,•'��x:.. R Rig nl-inl Rigmau[ aE Food Store 'l• •� s.l.gnage Size: 51,447 SF 1- Interlar � 'notprint 48X7 SIF +1- F Retail ! Restaurant Padang Required (@11200): 242 spaces rl I -Z_,g _ Size_ 7.200 SF +!- Parking Provided: 24a spaces *1- II �gj'- �..:?, `-- Footprint! 60' x 120' B-r� C --?' - Parking Required: Based on AElaration GJ I B-111 ' r R. ��_ zA Parking Previded: 40 spaces+l- s f r6-5-f -- 1 3 - ,e 6 �3 a tparcel ' '.n9 Aces +r. Multifamily B-13 1 Residential Gam: 227 Units +l- al e' No xment 23.63 Acres+l- Il .y e B'7 B-22 .. Slgnage ' G n B-21 B-1 B-30 B-2J 1 • B-2 -N - =--n 1J ❑ F ,Mtltn Anglenlg spat 0. . i es - -- 2--------------- -- SOURCE: Alternate Grocery Concept West End Site Plan prepared by Stimmel Associates, PA dated 5/22/20 Boring locations were determined in the field utilizing a handheld GPS unit SCALE: NTS NOVA s�0is „ Figure 3: Boring Location Plan Proposed West End Development Winston Salem, North Carolina NOVA Project Number 10705-2020024 KEY TO SYMBOLS AND CLASSIFICATIONS DRILLING SYMBOLS Split Spoon Sample a Undisturbed Sample (UD) Standard Penetration Resistance (ASTM D1586) 1 Water Table at least 24 Hours after Drilling SZ Water Table 1 Hour or less after Drilling 100/2" Number of Blows (100) to Drive the Spoon a Number of Inches (2) NX, NQ Core Barrel Sizes: 2%8- and 2-Inch Diameter Rock Core, Respectively REC Percentage of Rock Core Recovered RQD Rock Quality Designation — Percentage of Recovered Core Segments 4 or more Inches Long 01 Loss of Drilling Water MC Moisture Content Test Performed CORRELATION OF PENETRATION RESISTANCE WITH RELATIVE DENSITY AND CONSISTENCY Number of Blows, "N" Approximate Relative Densi 0-4 Very Loose 5 —10 Loose SANDS 11-30 Medium Dense 31— 50 Dense Over 50 Very Dense Number of Blows, "N" Approximate Consistency 0-2 Very Soft 3-4 Soft SILTS 5-8 Firm and 9 —15 Stiff CLAYS 16 — 30 Very Stiff 31— 50 Hard Over 50 Very Hard DRILLING PROCEDURES Soil sampling and standard penetration testing performed in accordance with ASTM D1586. The standard penetration resistance is the number of blows of a 140 pound hammer falling 30 inches to drive a 2-inch O.D., I% - inch I.D. split spoon sampler one foot. Core drilling performed in accordance with ASTM D2113. The undisturbed sampling procedure is described by ASTM D1587. Soil and rock samples will be discarded 30 days after the date of the final report unless otherwise directed. N ❑ VA SOIL CLASSIFICATION CHART COARSE GRAINED SOILS GRAVELS Clean Gravel less than 5% fines GW Well graded gravel GP Poorly graded gravel Gravels with Fines more than 12% fines GM Silty gravel GC Clayey gravel SANDS Clean Sand less than 5% fines SW Well graded sand SP Poorly graded sand Sands with Fines more than 12% fines SM Silty sand SC Clayey sand FINE GRAINED SOILS SILTS AND CLAYS Liquid Limit less than 50 Inorganic CL Lean clay ML Silt Organic OL Organic clay and silt SILTS AND CLAYS Liquid Limit 50 or more Inorganic CH Fat clay MH Elastic silt Organic OH Organic clay and silt HIGHLY ORGANIC SOILS Organic matter, dark color, organic odor PT Peat PARTICLE SIZE IDENTIFICATION GRAVELS Coarse % inch to 3 inches Fine No. 4 to % inch SANDS Coarse No. 10 to No. 4 Medium No. 40 to No. 10 Fine No. 200 to No. 40 SILTS AND CLAYS Passing No. 200 N ❑ VA N 0 VA TEST BORING RECORD B29I PROJECT: West End Development PROJECT NO.: 10705-2020024 CLIENT: Adams Property Group PROJECT LOCATION: Robinhood Road Winston-Salem LOCATION: SWM Device ELEVATION: 848 Ft-MSL DRILLER: CG2 LOGGED BY: KR DRILLING METHOD: HSA Diedrich D50 DATE: 6/29/20 DEPTH TO - WATER> INITIAL: s N/E AFTER 24 HOURS: N/E CAVING> L 11.7' ^ C o > :5 w Description U !E R 3 2 a)N Q E Cu ~ Cu z Graphic Depiction BLOW . NATURAL PLASTIC 10 COUNT MOISTURE LIMIT 20 LIQUID 60 LIMIT 10 0 845 840 835 830 825 820 815 2-2-2 3-4-4 4-4-5 3-4-3 4-5-7 30 40 Topsoil (7) 4 8 RESIDUUM: Moist, soft, brown (fine) sandy SILT (ML) Moist, firm, brown/orange slightly micaceous SILT (ML) w/ trace rock fragments & organics (roots) Moist, stiff, tan/brown slightly micaceous (fine) sandy SILT (ML) w/rock fragments Moist, firm, dark brown/grey highly micaceous SILT (ML) Very moist, stiff, tan/grey micaceous (fine) sandy SILT (ML) 5 9 41 7 10 12 15 Boring terminated at 15' 20 25 30 35 Pa e1of1 N 0 VA TEST BORING RECORD B30 PROJECT: West End Development PROJECT NO.: 10705-2020024 CLIENT: Adams Property Group PROJECT LOCATION: Robinhood Road Winston-Salem LOCATION: SWM Device ELEVATION: 845 Ft-MSL DRILLER: CG2 LOGGED BY: KR DRILLING METHOD: HSA Diedrich D50 DATE: 6/29/20 DEPTH TO - WATER> INITIAL: s N/E AFTER 24 HOURS: N/E CAVING> L 6.4' ^ 0 o > w Description U !E 6 3 a N Q Cu ~ N z Graphic Depiction BLOW . NATURAL PLASTIC 10 COUNT MOISTURE LIMIT I 20 LIQUID 60 LIMIT 10 845 840 835 830 825 820 815 810 3-5-9 3-5-6 3-2-4 2-3-4 30 40 Topsoil (8") ,, Thi ,, ,, 14 1 RESIDUUM: Moist, stiff, red/orange clayey SILT (ML) Moist, stiff, orange/tan clayey SILT (ML) Moist, firm, tan/orange slightly micaceous SILT (ML) 5 6 10 Boring terminated at 10' 15 20 25 30 35 Page 1 of 1 1/23/22. 4:40 PM North Carolina Secretary of State Search Results • Upload a PDF Filing • Order a Document Online • Add Entity to My Email Notification List • View Filings Limited Partnerships Legal Name West Edge, LP Information Sosld: 2319146 Status: Current -Active O Date Formed: 11 /29/2021 Citizenship: Foreign State of Incorporation: TX Annual Report Due Date: Registered Agent: Paracorp Incorporated Addresses Reg Office Reg Mailing Mailing 176 Mine Lake Ct #100 176 Mine Lake Ct #100 2298 Mount Pleasant St. Raleigh, NC 27615 Raleigh, NC 27615 Charleston, SC 29403 Principal Office 2298 Mount Pleasant St. Charleston, SC 29403 https://www.sosnc.gov/onIine_services/search/Business_Registration_ResuIts 1 /1 SOSID: 2319146 Date Filed: 12/10/2021 12:59:00 PM Elaine F. Marshall North Carolina Secretary of State C2021 344 00196 State of North Carolina Department of the Secretary of State APPLICATION FOR REGISTRATION AS A FOREIGN LIMITED PARTNERSHIP Pursuant to §59-902 of the General Statutes of North Carolina, the undersigned hereby submits this application for Registration as a Foreign Limited Partnership for the purpose of obtaining a Certificate of Authority to transact business in this State. 1. The name of the foreign limited partnership is: West Edge, LP 2. If the name of the foreign limited partnership is unavailable for use in the State of North Carolina, the name the limited partnership wishes to use is: (The name must contain the words "Limited Partnership," or the abbreviation "L.P." or "LP," or the combination "Ltd. Partnership".) 3. The jurisdiction in which the limited partnership was formed is and the date of formation was 11/29/2021 Perpetual Texas The limited partnership's period of duration is 4. The street address of the principal office is: Number and Street: 2298 Mount Pleasant St. City: Charleston State: SC zip Code: 29403 County: Charleston The mailing address, if different fi-om the street address, of the principal office: Telephone: Number and Street: City: 5. Name of Registered Agent: State: Zip Code: County: Paracorp Incorporated 6. Address of Registered Agent's Office: Number and Street: 176 Mine Lake Ct #100 city: Raleigh State: NC Zip Code: 27615 County: V Va ke The mailing address, if different from the street address, of the registered office: Number and Street: City: State: NC Zip Code: County: NOTES: Filing fee is $50. This document must be fired with the Secretary of State. BUSINESS REGISTRATION DIVISION P.O.BOX 29622 RALEIGH, NC 27626-06222 (Revised August, 2017), Page I Form LP-04 In consideration of the issuance of a Certificate of Authority to transact business in North Carolina, the limited partnership appoints the Secretary of State of North Carolina as the agent to receive service of process, notice or demand, whenever the foreign limited partnership fails to appoint or maintain a registered agent in this State, or whenever such registered agent cannot with reasonable diligence be found at the registered office. (Optional): Please provide a business e-mail address: The Secretary of State's Office will e-mail the business automatically at the address provided at no charge when a document is filed. The e-mail provided will not be viewable on the website. For more information on why this service is being offered, please see the instructions for this document. 9. Enter the name and address of each general partner: (attach additional sheets if necessary) Name West Edge - Adams, LLC Name Street/No.2298 Mount Pleasant St. Street/No. city Charleston city State/Zip`SC, 29403 State/Zip 10. Limited Partners (select 1 or 2, as appropriate) ❑ Attached is a list of the names and addresses of all limited partners (include full name/street address/city/state/zip code/county); or RI The location of the office where list of the names and addresses of the limited partners and their capital contributions will be kept as long as the limited partnership transacts business in North Carolina is: Number and Street: 2298 Mount Pleasant St. City: Charleston State: SC Zip Code: 29403 County: Charleston 11. (Select one) ❑ The foreign limited partnership is a foreign limited liability limited partnership. ® The foreign limited partnership is not a foreign limited liability 1nnited partnership. 12. This registration will be effective upon filing, unless a future date and/or time is specified: West Edge, LP By: West Edge -Adams, LLC, a South Carolina limited liability company, General Partner By: Franl F. A ms, Marloer NOTES: Filing fee is $50. This document must be filed with the Secretary of State. BUSINESS REGISTRATION DIVISION P.O.BOX 29622 RALEIGH, NC 27626-06222 (Revised August, 2017) Page 2 Form LP-04