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HomeMy WebLinkAboutSW6230102_Design Calculations_20230120Stormwater Calculations For Project: Tranquil Meadows Hoke County, NC Owner: H&H Investments, Inc L � SEAL -_ M 459 -., FRS � Hc, ���• r 23 Prepared by: ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P.O. Box 53787 1333 Morganton Road, Suite 201 Fayetteville, North Carolina 28305 P. (910) 483-4300 F. (910) 483-4052 www.LKandA.com Firm License #: C-887 TABLE OF CONTENTS Stormwater Narrative Basin 1 Calculations APPENDIX A Basin 2 Calcubitions APPENDIX B Misc. Erosion Control Calculations APPENDIX C Site Maps APPENDIX D Soils Report APPENDIX E Site Deed APPENDIX F STORMWATER NARRATIVE This project is a single-family subdivision located off Townsend Road in Hoke County, NC. The parcel is approximately 64 acres located between single-family residential lots and a farm lands. There are wetlands delineated along the eastern side of the property. The parcel has slopes of 1-3% across much of the property with steeper slopes along the perimeter. The soils are predominantly Norfolk (NoB) and Wagram (WaB). The development intends to implement two stormwater wet detention basin to provide pollutant removal as well as storm attenuation. Wet Basin-1 drains about 19.67 acres from this project with approximately 470,000 sf of proposed impervious Wet Basin-2 drains about 18.90 acres total with about 11 acres coming from the next future phase of the development. The total watershed will collect approximately 509,000 sf of proposed impervious area. Approximately 260,000 sf of impervious area will be from the future project area. Stormwater access easements are provided for maintenance access to the wet detention basins. Star;;iomental calculations are attached. Appendix A r—M ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Stormwater Wet Pond Design Criteria Project Name: P21-013 Tranquil Meadows Outlet: Wet Basin 1 REV 05-03-23 Calculate Runoff Coefficient A= 20.86 acres Ai= 8.55 acres la= 0.41 Rv=0.05+0.9*la Rv= 0.42 908,838 sf Watershed area 372,337 sf Impervious area Impervious fraction Runoff Coefficient Calculate Runoff Volume Required to be Controlled Rd= 1 in Design storm rainfall depth (typically 1" or 1.5") V=3630*Rd*Rv*A WQV= 31,712 cf Volume of runoff that must be 8.74 Ac in controlled for specified design storm Calculate Required Pond Surface Area for Permanent Pool Elevation SA/DA= 1.51 Based 3 Avg. Perm. Pool Depth **See Table 1 for SAIDA SA= 0.315 Ac 13,723 sf Required Surface Area @ Perm Pool f7 ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Composite C Calculations Project Name: P21-013 Tranquil Meadows Outlet: Wet Basin 1 Proposed C (Pond Area) Total Area- 856,961 sf c value Imp Area = 469,746 sf 0.9 Pery Area: 387,215 sf 0.3 Comp C= 0.63 Lp ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Time to Peak Calculations Project Name: P21-013 Tranquil Meadows Outlet, Wet Basin 1 Calculate Time to Peak & Volume of Runoff Qp 86.8 cfs DA= 19.67 acres Rational C= 0.63 P= 5.51 in (10yr/24hr storm) Cn=ab+cx^d a= 50.82581 b + x^d b= 1.461704 c= 165.6338 d= 1.350661 Cn= 82 x= Rational C S= 2.25 (1000/CN)-10 Q= 3.50 in Tp 34.55 min Volume of Runoff (10 Year Storm) Vol=1.39 * Qp * Tp Vol= 249,999 cf Hydrograph Shape 8 min Ascending limb= 4.32 Decending limb= 7.21 Project Name: Outlet - Pond Storage= Pond Depth(h)= Drawdown Time= Cid= 9= The Orifice Equation LA ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Drawdown Orifice Sizing Calculations P21-013 Tranquil Meadows Wet Basin 1 45,744 cf Water Quality Volume 0.57 ft HO=H/3 2.5 days 2-5 days 0.6 Coefficient of Discharge (typical 0.6) 32.2 ft/sec^2 Gravity Q= Cd A Sgrt(2 g h) Rearrange to solve for A, the minimum orifice area needed to meet drawdown requirements Q= 0.21 cfs Based on pond volume and desired drawdown time A= 0.05826 sf 8.39 si Number of Orifices= 1 Minimum diameter to meet area d= Use: Check Outflow time Q= Cd A Sgrt(2 g h) Q= Drawdown time= 3.27 inch diameter orifice 3 " diameter orifice 0.0491 sf 0.18 cfs 2.97 days OK ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Anti -Flotation Sizing Calculations Project Name: P21-013 Tranquil Meadows Outlet: Wet Basin 1 Riser Diameter = in (circular) Dimensions of Riser= 5 5 ft Depth of pond = 7.5 ft Required Factor of Safety = 1.5 Cross Sectional Area of Riser Circular = 0.00 sf Rectangular= 25 sf Volume of Water Displaced Depth of pond * Cross -sectional area 187.5 cf Weight of Water Displaced (assuming weight of water = 62.4 Ib/cf) 62.4 * Volume of water Displaced 11700.00 lb Minimum Weight of Anti-Flotaton Device FS * WoW Displaced 17550.00 lb Riser Base Provided 8 ft x 8 ft x 2 ft (depth) Weight of concrete assumed 150 Ib/cf Weight of Base Provided = 19200.00 lb FS Provided = 1.64 OK f7 ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 vwvw.LKandA.com F. (910) 483-4052 Pond Volume Calculations Permanent Pool Volume (Main Pool Only) Stage F-lev. Diff Uontour Area Incr. Vol. Accum. Vol. (ft) (ft) (s (cf) (cf) 218 0.0 13,231 0 0 219 1.0 14,207 13,719 13,719 220 1.0 15,207 14,707 28,426 221 1.0 16,234 15,721 44,147 221.5 0.5 16,757 8,248 52,394 222 0.5 19,464 9,055 61,450 Forebay Only Volume Stage ev. Diff Contour Area Incr. Vol. Accum. Vol. (ft) (ft) (sf) (cf) (cf) 218 0.0 1763 0 0 219 1.0 2143 1,953 1,953 220 1.0 2548 2,346 4,299 221 1.0 2978 2,763 7 062 222 1.0 3433 3,206 10,267 Temporary Pool Volume Stage ev. Diff Contour Area Incr. Vol. Accum. Vol. s c c 222 0.0 22,897 0 0 222.5 0.5 26.602 12,375 12,375 223 0.5 27,601 13,551 25,926 223.7 0.7 29,022 19,818 45,744 Skimmer Basin Volume Elev. Contour Accum. Stage Diff Area Incr. Vol. Vol. it ft) (sf) (cf) (cf) 0.0 0 0 0.0 0 0 0.0 0 0 0.0 0 0 0.0 0 0 0.5 0 0 0.a 0 0 0.0 0 0 0.0 0 0 0.0 0 0 Perm Pool Elev. 17% 39,541 cf Perm Pool Elev. Temp Pool Elev. Skimmer Elev. jZ ENGINEERING - SURVEYING - DESIGNING - DRAFTING J Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Georgetown Estates Section Three Pond Volumes Average Depth Equation 2 VPP= #REF! cf SA= #REF! Davg= #REF! ft Equation 2. Average depth when the shelf is not submerged or the shelf is being included in the average depth calculation Vpp Devg = SA Where: D., = Average depth (feet) VPP = Main pool volume at permanent pool elevation (feet3) SA = Main pool area at permanent pool elevation fact - Average Depth Equation 3 VPP= 61,450 cf VShelf= 696.25 cf ABottom of Shelf= 16.757 sf Davg= 3.63 ft Amax Over Shelf= 0.5 ft Pperm Pool= 557 ft Wsubmerged pare :)f shelf= 5 ft VShelf= 696.25 cf Equation 3. Average depth when the shelf is partially or fully submerged and the shelf is being excluded from the average depth calculation VPp— Vshelf Dew _ Elbottom of shelf Where: D.,,g = Average depth (feet) Vpp = Main pool volume at permanent pool elevation (feet3) Vs. = Volume over the shelf only (feet3) — see below Ah.tomofshem = Area of main pool at the bottom of the shelf (feeta) Vshslf = 0.5 * Depth....rsh.lf* Perimeter,,....., * Widthxulb . g.dp.n arsh.lr Where: Depth.... Bhedf = Depth of water at the deep side of the shelf as measured from the permanent pool (feet) Perimeterpaa poa = Perimeter of main pool at the bottom of the shelf (feet) V%Adthsubmery.d part ofshef = Width from the deep side to the dry side of the shelf as measured at permanent pool (feet) Table of Contents Hydraflow Hydrographs by Intelisolve WET BASIN 1.gpw Thursday, Jan 5 2023, 12:40 PM Hydrograph Return Period Recap...................................................................... 1 1 - Yea r SummaryReport................................................................................................................. 2 HydrographReports........................................................................................................... 3 Hydrograph No. 1, Rational, PRE-DEVELOPMENT......................................................... 3 Hydrograph No. 2, Rational, Post Dev.............................................................................. 4 Hydrograph No. 3, Reservoir, WET BASIN 1................................................................... 5 PondReport................................................................................................................. 6 10 - Yea r SummaryReport................................................................................................................. 7 HydrographReports........................................................................................................... 8 Hydrograph No. 1, Rational, PRE-DEVELOPMENT......................................................... 8 Hydrograph No. 2, Rational, Post Dev............................................................................. 9 Hydrograph No. 3, Reservoir, WET BASIN 1................................................................. 10 PondReport ............................................................................................................... 11 100 -Year SummaryReport............................................................................................................... 12 HydrographReports......................................................................................................... 13 Hydrograph No. 1, Rational, PRE-DEVELOPMENT....................................................... 13 Hydrograph No. 2, Rational, Post Dev............................................................................ 14 Hydrograph No. 3, Reservoir, WET BASIN 1................................................................. 15 PondReport ............................................................................................................... 16 Hydrograph Return Period Recap 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 PRE -DEVELOPMENT 1 Rational ------- 26.83 ------- ------- ------- 41.32 46.16 ------- 53.03 2 Rational ------- 56.33 ------- ------- ------- 86.76 96.93 ------- 111.37 Post Dev 3 Reservoir 2 23.03 ------- ------- ------- 54.06 61.52 ------- 67.76 WET BASIN 1 Proj. file: WET BASIN 1.gpw Thursday, Jan 5 2023, 12:40 PM Hydraflow Hydrographs by Intelisolve Hydrograph Summary Report Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to peak (min) Volume (cuft) Inflow hyd(s) Maximum elevation (ft) Maximum storage (cuft) ------ Hydrograph description 1 Rational 26.83 1 8 12,876 ---- ------ PRE -DEVELOPMENT 2 Rational 56.33 1 35 155,886 ---- ------ ------ Post Dev 3 Reservoir 23.03 1 69 142,098 2 Period: 1 225.42 98,952 WET BASIN 1 Jan 5 2023, 12:40 PM WET BASIN 1.gpw Return Year Thursday, Hydra#low Hydrographs by Intelisolve Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 1 PRE -DEVELOPMENT Hydrograph type = Rational Storm frequency = 1 yrs Drainage area = 19.670 ac Intensity = 4.546 in/hr IDF Curve = Townsend Road IDF Chart.pdf 24.00 20.00 16.00 12.00 4.00 0.00 0.0 — Hyd No. 1 0.1 PRE -DEVELOPMENT Hyd. No. 1 -- 1 Yr 0.2 Thursday. Jan 5 2023, 12:40 PM Peak discharge = 26.83 cfs Time interval = 1 min Runoff coeff. = 0.3 Tc by User = 8.00 min Asc/Rec limb fact = 1/1 0.3 Hydrograph Volume = 12,876 cuft Q (cfs) 28.00 24.00 20.00 16.00 12.00 4.00 0.00 0.3 Time (hrs) 3 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Thursday, Jan 5 2023 12:40 PM Hyd. No. 2 Post Dev Hydrograph type = Rational Peak discharge = 56.33 cfs Storm frequency = 1 yrs Time interval = 1 min Drainage area = 19.670 ac Runoff coeff. = 0.63 Intensity = 4.546 in/hr Tc by User = 8.00 min OF Curve - Townsend Road OF Chart.pdf Asc/Rec limb fact = 4.32/7.21 Post Dev Hyd. No. 2 -- 1 Yr 50.00 30.00 20.00 10.00 Hydrograph Volume = 155,886 cult Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 0.00 j— I I I I I- I x ! 0.00 0.0 0.2 0.3 0.5 0.7 0.8 1.0 1.2 1.3 1.5 1.7 Hyd No. 2 Time (hrs) 4 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Thursday, Jan 5 2023, 12:40 PM Hyd. No. 3 WET BASIN 1 Hydrograph type = Reservoir Peak discharge = 23.03 cfs Storm frequency = 1 yrs Time interval = 1 min Inflow hyd. No. = 2 Max. Elevation = 225.42 ft Reservoir name = WET BASIN 1 Max. Storage = 98,952 cuft Storage Indication method used. Hydrograph Volume = 142,098 cuft Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0 2 5 — Hyd No. 3 WET BASIN 1 Hyd. No. 3 -- 1 Yr 7 9 12 14 16 Hyd No. 2 Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 0.00 19 21 23 26 Time (hrs) 5 Pond Report Hydraflow Hydrographs by Intelisolve Pond No. 1 - WET BASIN 1 Pond Data Pond storage is based on known contour areas. Average end area method used. Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 222.00 22,897 0 0 0.50 222.50 26,602 12,375 12,375 1.00 223.00 27,601 13,551 25,926 2.00 224.00 29,640 28,621 54,546 3.00 225.00 31,736 30,688 85,234 4.00 226.00 33,889 32,813 118,047 5.00 227.00 36,099 34,994 153,041 6.00 228.00 38.364 37,232 190,272 Culvert / Orifice Structures [A] [B] [C] [D] Rise (in) = 36.00 3.00 8.00 0.00 Span (in) = 36.00 3.00 24.00 0.00 No. Barrels = 1 1 3 0 Invert El. (ft) = 221.00 222.00 223.70 0.00 Length (ft) = 43.50 0.50 0.50 0.00 Slope (%) = 2.30 0.00 0.00 0.00 N-Value = .013 .013 .013 .000 Orif. Coeff. = 0.60 0.60 0.60 0.00 Multi -Stage = n/a Yes Yes No Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 0.00 Weir Structures Thursday, Jan 5 2023, 12.40 PM [A] [B] [C] [D] Crest Len (ft) = 20.00 30.00 0.00 0.00 Crest EI. (ft) = 225.50 227.00 0.00 0.00 Weir Coeff. = 3.33 2.60 0.00 0.00 Weir Type = Riser Broad --- --- Multi-Stage = Yes No No No Exfiltration = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 ft Note: Culverl/Orifice outflows have been analyzed under inlet and outlet control. Stage / Discharge 20.00 40.00 60.00 80.00 100.00 120.00 140.00 Total Q Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 160.00 Discharge (cfs) 6 Hydrograph Summary Report Hyd. No. Hydrograph type (origin) Peak flow (cfs) 41.32 Time interval (min) 1 Time to peak (min) 8 Volume (cuft) 19,832 Inflow hyd(s) ---- Maximum elevation (ft) ------ Maximum storage (cuft) Hydrograph description PRE -DEVELOPMENT 1 Rational ------ 2 Rational 86.76 1 35 240,095 ---- ------ ------ Post Dev 3 Reservoir 54.06 1 56 225,094 2 226.13 122,706 Thursday, WET BASIN 1 Jan 5 2023, 12:40 PM WET BASIN 1.gpw Return Period: 10 Year Hvdrnflnw Hvdrnnranhc by Inh hQnhra Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 1 PRE -DEVELOPMENT Hydrograph type = Rational Storm frequency = 10 yrs Drainage area = 19.670 ac Intensity = 7.002 in/hr IDF Curve = Townsend Road IDF Chart.pdf 40.00 30.00 20.00 10.00 Hyd No. 1 0.1 PRE -DEVELOPMENT Hyd. No. 1 -- 10 Yr 0.2 Thursday, Jan 5 2023, 12:40 PM Peak discharge = 41.32 cfs Time interval = 1 min Runoff coeff. = 0.3 Tc by User = 8.00 min Asc/Rec limb fact = 1/1 0.3 Hydrograph Volume = 19,832 cuft Q (cfs) 50.00 40.00 30.00 20.00 10.00 0.00 0.3 Time (hrs) 8 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 2 Post Dev Hydrograph type = Rational Storm frequency = 10 yrs Drainage area = 19.670 ac Intensity = 7.002 in/hr OF Curve = Townsend Road OF Chart.pdf Q (cfs) 90.00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.0 Post Dev Hyd. No. 2 -- 10 Yr Thursday, Jan 5 2023, 12:40 PM Peak discharge = 86.76 cfs Time interval = 1 min Runoff coeff. = 0.63 Tc by User = 8.00 min Asc/Rec limb fact = 4.32/7.21 Hydrograph Volume = 240,095 cult 0.2 0.3 0.5 0.7 0.8 1.0 1.2 1.3 1.5 Hyd No. 2 Q (cfs) 90.00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 1.7 Time (hrs) 9 Hydrograph Plot I iydraflow Hydrographs by Intelisolve Hyd. No. 3 WET BASIN 1 Hydrograph type = Reservoir Storm frequency = 10 yrs Inflow hyd. No. = 2 Reservoir name = WET BASIN 1 Storage Indication method used WET BASIN 1 Hyd. No. 3 -- 10 Yr 70.00 60.00 50.00 40.00 Thursday, Jan 5 2023, 12:40 PM Peak discharge = 54.06 cfs Time interval = 1 min Max. Elevation = 226-13 ft Max. Storage = 122,706 cuft Hydrograph Volume = 225,094 cuft Q (cfs) 90.00 80.00 70.00 60.00 50.00 40.00 30.00 30.00 20.00 2000. 10.00 10.00 0.00 0.00 0.0 0.3 0.7 1.0 1.3 1.7 2.0 2.3 2.7 3.0 3.3 3.7 4.0 4.3 Hyd No. 3 Hyd No. 2 Time (hrs) 10 Pond Report Hydraflow Hydrographs by Intelisolve Pond No. 1 - WET BASIN 1 Pond Data Pond storage is based on known contour areas. Average end area method used. Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 222.00 22,897 0 0 0.50 222.50 26,602 12,375 12,375 1.00 223.00 27,601 13,551 25,926 2.00 224.00 29,640 28,621 54,546 3.00 225.00 31,736 30,688 85,234 4.00 226.00 33,889 32,813 118,047 5.00 227.00 36,099 34,994 153,041 6.00 228.00 38,364 37,232 190,272 Thursday, Jan 5 2023, 12:40 PM Culvert / Orifice Structures Weir Structures [A►] [B] [C] [D] [A►] [B] [C] [D] Rise (in) = 36.00 3.00 8.00 0.00 Crest Len (ft) = 20.00 30.00 0.00 0.00 Span (in) = 36.00 3.00 24.00 0.00 Crest El. (ft) = 225.50 227.00 0.00 0.00 No. Barrels = 1 1 3 0 Weir Coeff. = 3.33 2.60 0.00 0.00 Invert El. (ft) = 221.00 222.00 223.70 0.00 Weir Type = Riser Broad --- --- Length (ft) = 43.50 0.50 0.50 0.00 Multi -Stage = Yes No No No Slope (%) = 2.30 0.00 0.00 0.00 N-Value = .013 .013 .013 .000 Orif. Coeff. = 0.60 0.60 0.60 0.00 Multi -Stage = n/a Yes Yes No Exfiltration = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 It Note: CulverUOrifice outflows have been analyzed under inlet and outlet control. Stage (ft) 6.00 5.00 4.00 3.00 2.00 fifflIrl 0.00 1 0.00 Stage / Discharge 20.00 40.00 60.00 80.00 100.00 120.00 140.00 Total Q Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 160.00 Discharge (cfs) 12 Hydrograph Summary Report Hyd. No. Hydrograph type (origin) Rational FPeak flow (cfs) i ' 53.03 Time interval (min) Time to peak (min) Volume (cuft) Inflow hyd(s) ---- Maximum elevation (ft) ------ Maximum storage (cuft) ------ Hydrograph description PRE -DEVELOPMENT 1 1 8 25,455 2 Rational 111.37 1 35 308,170 ---- ------ ------ Post Dev 3 Reservoir 67.76 1 57 292,220 2 Period: 100 226.73 143,654 WET BASIN 1 Jan 5 2023, 12:40 PM WET BASIN 1.gpw Return Year Thursday, Hvdrnflnw Hvrirnnrnnhc h%i InfaImn1kia Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 1 PRE -DEVELOPMENT Hydrograph type = Rational Storm frequency = 100 yrs Drainage area = 19.670 ac Intensity = 8.987 in/hr IDF Curve = Townsend Road IDF Chart.pdf 50.00 40.00 30.00 20.00 10.00 =6 Hyd No. 1 0.1 PRE -DEVELOPMENT Hyd. No. 1 -- 100 Yr 0.2 Thursday, Jan 5 2023, 12:40 PM Peak discharge = 53.03 cfs Time interval = 1 grin Runoff coeff. = 0.3 Tc by User = 8.00 min Asc/Rec limb fact = 1/1 0.3 Hydrograph Volume = 25,455 cuft Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.3 Time (hrs) 13 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 2 Post Dev Hydrograph type = Rational Storm frequency = 100 yrs Drainage area = 19.670 ac Intensity = 8.987 in/hr IDF Curve = Townsend Road OF Chart.pdf Q (cfs) 120.00 — — 100.00 :M 40.00 Post Dev Hyd. No. 2 -- 100 Yr Thursday, Jan 5 2023, 12:40 PM Peak discharge = 111.37 cfs Time interval = 1 min Runoff coeff. = 0.63 Tc by User = 8.00 min Asc/Rec limb fact = 4.32/7.21 Hydrograph Volume = 308,170 cuft Q (cfs) 120.00 100.00 40.00 20.00 0.00 1 L L 0.00 0.0 0.2 0.3 0.5 0.7 0.8 1.0 1.2 1.3 1.5 1.7 Hyd No. 2 Time (hrs) 14 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 3 WET BASIN 1 Hydrograph type = Reservoir Storm frequency = 100 yrs Inflow hyd. No. = 2 Reservoir name = WET BASIN 1 Storage Indication method used WET BASIN 1 Hyd. No. 3 -- 100 Yr 100.00 09 M e, 40.00 20.00 Thursday, Jan 5 2023, 12:40 PM Peak discharge = 67.76 cfs Time interval = 1 min Max. Elevation = 226.73 ft Max. Storage = 143,654 cuft Hydrograph Volume = 292,220 cuft Q (cfs) 120.00 100.00 .we] 40.00 20.00 0.00 -AL 0.00 0.0 0.3 0.7 1.0 1.3 1.7 2.0 2.3 2.7 3.0 3.3 3.7 4.0 Hyd No. 3 Hyd No. 2 Time (hrs) 15 Pond Report Hydraflow Hydrographs by Intelisolve Pond No. 1 - WET BASIN 1 Pond Data Pond storage is based on known contour areas. Average end area method used Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cult) Total storage (cult) 0.00 222.00 22,897 0 0 0.50 222.50 26,602 12,375 12,375 1.00 223.00 27,601 13,551 25,926 2.00 224.00 29,640 28.621 54,546 3.00 225.00 31,736 30,688 85,234 4.00 226.00 33,889 32,813 118,047 5.00 227.00 36,099 34,994 153,041 6.00 228.00 38,364 37,232 190,272 Culvert / Orifice Structures [A►] [B] [C] [D] Rise (in) = 36.00 3.00 8.00 0.00 Span (in) = 36.00 3.00 24.00 0.00 No. Barrels = 1 1 3 0 Invert El. (ft) = 221.00 222.00 223.70 0.00 Length (ft) = 43.50 0.50 : 50 0.00 Slope (%) = 2.30 0.00 0.00 0.00 N-Value = .013 .013 .013 .000 Orif. Coeff. = 0.60 0.60 0.60 0.00 Multi -Stage = n/a Yes Yes No Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 0.00 Thursday, Jan 5 2023, 12:40 PM Weir Structures [A] [B] [C] [D] Crest Len (ft) = 20.00 30.00 0.00 0.00 Crest El. (ft) = 225.50 227.00 0.00 0.00 Weir Coeff. = 3.33 2.60 0.00 0.00 Weir Type = Riser Broad --- --- Multi-Stage = Yes No No No Exfiitration = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 ft Note: Culvert/Orifice outflows have been analyzed under inlet and outlet control. Stage / Discharge 20.00 40.00 60.00 80.00 100.00 120.00 140.00 - Total Q Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 - 0.00 160.00 Discharge (cfs) 16 Appendix B ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Stormwater Wet Pond Design Criteria Project Name: P21-013 Tranquil Meadows Outlet: Wet Basin 2 Calculate Runoff Coefficient A= 18.90 acres Ai= 11.69 acres la= 0.62 Rv=0.05+0.9*la Rv= 0.61 823,074 sf Watershed area 509,323 sf Impervious area Impervious fraction Runoff Coefficient Calculate Runoff Volume Required to be Controlled Rd= 1 in Design storm rainfall depth (typically 1" or 1.5") V=3630*Rd*Rv*A WQV= 41,629 cf Volume of runoff that must be 11.47 Ac in controlled for specified design storm Calculate Required Pond Surface Area for Permanent Pool Elevation SA/DA= 1.9 Based 3 Avg. Perm. Pool Depth **See Table 10-1,10-2.10-3 for SAIDA SA= 0.359 Ac 15,638 sf Required Surface Area @ Perm Pool ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Time to Peak Calculations Project Name-. P21-013 Tranquil Meadows Outlet: Wet Basin 2 Proposed C (Pond Area) Total Area- 823,074 sf c value Imp Area = 509.323 sf 0.9 Pery Area: 313,751 sf 0.3 Comp C= 0.67 FM ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Time to Peak Calculations Project Name: P21-013 Tranquil Meadows Outlet: Wet Basin 2 Calculate Time to Peak & Volume of Runoff Qp 88.7 cfs DA= 18.9 acres Rational C= 0.67 P= 5.51 in (10yr/24hr storm) Cn=ab+cx^d a= 50.82581 b + x"d b= 1.461704 c= 165.6338 d= 1.350661 Cn= 84 x= Rational C S= 1.97 (1000/CN)-10 Q= 3.69 in Tp 34.26 min Volume of Runoff (10 Year Storm) Vol=1.39 " Qp * Tp Vol= 253,323 cf Hydrograph Shape tc= 8 min Ascending limb= 4.28 Decending limb= 7.15 Project Name: Outlet: Pond Storage= Pond Depth(h)= Drawdown Time= Cd= 9= The Orifice Equation FM ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Drawdown Orifice Sizing Calculations P21-013 Tranquil Meadows Wet Basin 2 45,725 cf Water Quality Volume 0.5 ft HO=H/3 2.5 days 2-5 days 0.6 Coefficient of Discharge (typical 0.6) 32.2 ft/sec"2 Gravity Q= Cd A Sgrt(2 g h) Rearrange to solve for A, the minimum orifice area needed to meet drawdown requirements Q= 0.21 cfs Based on pond volume and desired drawdown time A= 0.06218 sf 8.95 si Number of Orifices= 1 Minimum diameter to meet area d= Use. - Check Outflow time Q= Cd A Sgrt(2 g h) Q= Drawdown time= 3.38 inch diameter orifice 3 '' diameter orifice 0.0491 sf 0.17 cfs 3.17 days OK Project Name: Outlet: Riser Diameter = Dimensions of Riser= Depth of pond = ENGINEERING -_SURVEYING - DESIGNING - DRAFTING ? La King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Anti -Flotation Sizing Calculations P21-013 Tranquil Meadows Wet Basin 2 Required Factor of Safety = in (circular) 5 10ft Cross Sectional Area of Riser Circular = 0.00 sf Rectangular= 25 sf Volume of Water Displaced Depth of pond * Cross -sectional area 250 cf Weight of Water Displaced (assuming weight of water = 62.4 Ib/cf) 62.4 * Volume of water Displaced 15600.00 lb 1.5 Minimum Weight of Anti-Flotaton Device FS * WoW Displaced 23400.00 lb Riser Base Provided 9ft x 9ft x Weight of concrete assumed 150 Ib/cf Weight of Base Provided = 24300.00 lb FS Provided = 1.56 OK 5 ft 2 ft (depth) ENGINEERING -SURVEYING - DESIGNING - DRAFTING Larry King L Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 Pond Volume Calculations Permanent Pool Volume (Main Pool Only) ev. Contour ccum. Stage Diff Area Incr. Vol. Vol. ft) ft (sf) cf) cf 222 0.0 10,638 0 0 223 1.0 11,538 11,088 11,088 224 1.0 12,463 12,001 23,089 225 1.0 13,414 12,939 36,027 225.5 1.0 13,898 13,656 49,683 226 0.5 16,417 7,579 57,262 Forebay Only Volume Stage ev. Diff Contour Area Incr. Vol. Accum. Vol. ft (ft) (sf) (cf) (Cf 222 0.0 1767 0 0 223 1.0 2259 2,013 2,013 224 1.0 2776 2.518 4.531 225 1.0 3319 3,048 7,578 226 1.0 3886 3,603 11,181 Temporary Pool Volume ev. Contour Accum. Stage Diff Area Incr. Vol. Vol. (ft) (ft) (sf) (Cf) (cf) 226 0.0 1 16,417 0 0 225.5 0.5 19,092 8,877 8,877 227 0.5 24,899 10,998 19,875 228 1.0 26,800 25,850 45,725 Skimmer Basin Volume ev. Contour Accum. Stage Diff Area Incr. Vol. Vol. (ft) (ft) (sf) (cf) (cf) 163 0.0 2,860 0 0 164 1.0 3.551 3,206 3,206 165 1.0 4,267 3,909 7,115 166 1.0 5,008 4,638 11,752 167 1.0 5,773 5,391 17,143 167.5 0.5 8,395 3,542 20,685 168 0.5 10.141 4,634 25.319 169 5.0 11,707 54.620 57,826 170 5.0 13,328 62,588 69,702 170.5 4.5 14,160 61.848 73,600 Perm Pool Elev. 20% 4T, TTcf Perm Pool Elev. Temp Pool Elev. Skimmer Elev. 7 ENGINEERING - SURVEYING - DESIGNING - DRAFTING OUTLarry King & Associates, R.L.S., P.A. P. (910) 483-4300 www.LKandA.com F. (910) 483-4052 I� Georgetown Estates Section Three Pond Volumes Average Depth Equation 2 VPP= #REF! cf SA= #REF! Da„ g= #REF! ft Equation 2. Average depth when the shelf is not submerged or the shelf is being included in the average depth calculation VPP Davg = SA Where: D.,,9 = Average depth (feet) VPP = Main pool volume at permanent pool elevation (feet3) SA = Main pool area at permanent pool elevation (feet2 Average Depth Equation 3 VPP= 63,645 cf VShelf= 668.75 cf ABottom of Shelf= 15,356 sf Dag= 4.10 ft Amax over is f— 0.5 ft Pperm Pool= 535 ft Wsubmerged part of shelf= 5 ft VShelf= 668.75 cf Equation 3. Average depth when the shelf is partially or fully submerged and the shelf is being excluded from the average depth calculation VPP— VAaf Davy = Abottom of shed Where: D.,,9 = Average depth (feet) VPP = Main pool volume at permanent pool elevation (feet3) Vshelf = Volume over the shelf only (feet3) — see below Abod of.i,w = Area of main pool at the bottom of the shelf (feet2) V.h.lf= 0.5° Depth. ..r.h.if" Perimeter p.rm pool Vllldth.,r,m.rg.d pat ofsh.lf Where: Depthm.xuv.r.helf = Depth of water at the deep side of the shelf as measured from the permanent pool (feet) Perimeterp.m, pod = Perimeter of main pool at the bottom of the shelf (feet) Widtha,bm.r9.d part ofsWf = Width from the deep side to the dry side of the shelf as measured at permanent pool (feet) Table of Contents Hydraflow Hydrographs by Intelisolve WET BASIN 2.gpw Thursday, Jan 5 2023, 12:45 PM Hydrograph Return Period Recap...................................................................... 1 1 -Year SummaryReport................................................................................................................. 2 HydrographReports........................................................................................................... 3 Hydrograph No. 1, Rational, PRE-DEVELOPMENT......................................................... 3 Hydrograph No. 2, Rational, Post Dev.............................................................................. 4 Hydrograph No. 3, Reservoir, WET BASIN 2................................................................... 5 PondReport ................................................................................................................. 6 10 - Year SummaryReport ................................................................................................................. 7 HydrographReports........................................................................................................... 8 Hydrograph No. 1, Rational, PRE-DEVELOPMENT......................................................... 8 Hydrograph No. 2, Rational, Post Dev.............................................................................. 9 Hydrograph No. 3, Reservoir, WET BASIN 2 ................................................................. 10 PondReport ............................................................................................................... 11 100 -Year SummaryReport ............................................................................................................... 12 HydrographReports......................................................................................................... 13 Hydrograph No. 1, Rational, PRE-DEVELOPMENT....................................................... 13 Hydrograph No. 2, Rational, Post Dev............................................................................ 14 Hydrograph No. 3, Reservoir, WET BASIN 2................................................ ..... 15 ............ PondReport ............................................................................................................... 16 Hydrograph Return Period Recap Hyd. Hydrograph Inflow Peak Outflow (cfs) Hydrograph No. type Hyd(s) description (origin) ------- 1-Yr 25.78 2-Yr ------- 3-Yr ------- 5-Yr ------- 10-Yr 39.70 25-Yr 44.35 50-Yr ------- 100-Yr 50.96 PRE -DEVELOPMENT 1 Rational 2 Rational ------- 57.56 ------- ------- ------- 88.66 99.05 ------- 113.80 Post Dev 3 Reservoir 2 24.14 ------- ------- ------- 52.80 66.44 ------- 84.35 WET BASIN 2 Jan 5 2023, 12:45 PM Proj. file. WET BASIN 2.gpw Thursday, Hvdraflow Hvdroaraohs by Inteiisolve F, Hydrograph Summary Report ;imum Hydrograph gage description uft) PRE -DEVELOPMENT Post Dev 47 1 WET BASIN 2 rsday, Jan 5 2023, 12:45 PM Hydraflow Hydropraphs by Intelisolve Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 1 PRE -DEVELOPMENT Hydrograph type = Rational Storm frequency = 1 yrs Drainage area = 18.900 ac Intensity = 4.546 in/hr IDF Curve = Townsend Road IDF Chart.pdf Q (cfs) 28.00 24.00 20.00 16.00 12.00 8.00 4.00 0.00 0.0 Hyd No. 1 PRE -DEVELOPMENT Hyd. No. 1 -- 1 Yr Thursday, Jan 5 2023, 12:45 PM Peak discharge = 25.78 cfs Time interval = 1 min Runoff coeff. = 0.3 Tc by User = 8.00 min Asc/Rec limb fact = 1/1 0.1 0.2 0.3 Hydrograph Volume = 12,372 cult Q (cfs) 28.00 24.00 20.00 16.00 12.00 8.00 4.00 - 0.00 0.3 Time (hrs) 3 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 2 Post Dev Hydrograph type = Rational Storm frequency = 1 yrs Drainage area = 18.900 ac Intensity = 4.546 in/hr OF Curve = Townsend Road OF Chart.pdf Post Dev Hyd. No. 2 -- 1 Yr 50.00 40.00 20.00 10.00 Thursday, Jan 5 2023, 12:45 PM Peak discharge = 57.56 cfs Time interval = 1 min Runoff coeff. = 0.67 Tc by User = 8.00 min Asc/Rec limb fact = 4.28/7.15 Hydrograph Volume = 157,912 cult Q (cfs) 60.00 50.00 K� 30.00 20.00 M 11 0.00 " 1- .- I , I I I I d --L 0.00 0.0 0.2 0.3 0.5 0.7 0.8 1.0 1.2 1.3 1.5 1.7 Hyd No. 2 Time (hrs) 4 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Thursday, Jan 5 2023, 12:45 PM Hyd. No. 3 WET BASIN 2 Hydrograph type = Reservoir Peak discharge = 24.14 cfs Storm frequency = 1 yrs Time interval = 1 min Inflow hyd. No. = 2 Max. Elevation = 229.85 ft Reservoir name = WET BASIN 2 Max. Storage = 99,647 cuft Storage Indication method used. Hydrograph Volume = 147,592 cuft -M 40.00 30.00 20.00 10.00 0.00 0 3 5 — Hyd No. 3 E:3 WET BASIN 2 Hyd. No. 3 -- 1 Yr Q (cfs) 60.00 .�l 40.00 30.00 rM 10.00 0.00 10 13 15 18 20 23 25 28 Hyd No. 2 Time (hrs) 5 Pond Report Hydraflow Hydrographs by Intelisolve Thursday, Jan 5 2023, 12:45 PM Pond No. 1 - WET BASIN 2 Pond Data Pond storage is based on known contour areas. Average end area method used. Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sgft) Incr. Storage (cuft) Total storage (cuft) 0.00 226.00 20,303 0 0 0.50 226.50 19,092 9,849 9,849 1.00 227.00 24,899 10,998 20,847 2.00 228.00 26,800 25,850 46,696 3.00 229.00 28,758 27,779 74,475 4.00 230.00 30,772 29,765 104,240 5.00 231.00 32,842 31,807 136,047 6.00 232.00 34,965 33,904 169,951 Culvert / Orifice Structures Weir Structures [A] [B] [C] [D] [A] [B] [C] [D] Rise (in) = 24.00 3.00 8.00 0.00 Crest Len (ft) = 20.00 45.00 0.00 0.00 Span (in) = 24.00 3.00 24.00 0.00 Crest El. (ft) = 230.00 230.60 0.00 0.00 No. Barrels = 1 1 3 0 Weir Coeff. = 3.33 2.60 0.00 0.00 Invert El. (ft) = 221.00 226.00 228.00 0.00 Weir Type = Riser Broad Length (ft) = 60.00 0.50 0.50 0.00 Multi -Stage = Yes No No No Slope (%) = 0.50 0.00 0.01 0.00 N-Value = .013 .013 .013 .000 Orif. Coeff. = 0.60 0.60 0.60 0.00 Multi -Stage = n/a Yes Yes No Exfiltration = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 ft Note: Culvert/Orifice outflows have been analyzed under inlet and outlet control. Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 Stage / Discharge Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 6 0.00 1 I 1 1 1 1 1 1 1 1 1 1 1 1 0.00 0.00 20.00 40.00 60.00 80.00 100.00 120.00 140.00 160.00 180.00 200.00 220.00 240.00 260.00 Total Q Discharge (cfs) 7 Hydrograph Summary Report Hyd. Hydrograph Peak Time Time to Volume Inflow No. type flow interval peak hyd(s) (origin) (cfs) (min) (min) , (cuft) 1 Rational 39.70 1 8 19,056 ---- 2 Rational 88.66 1 34 243,215 ---- 3 Reservoir 52.80 1 57 232,382 2 Maximum Maximum Hydrograph elevation storage description (ft) (cuft) ------ ------ PRE -DEVELOPMENT ------ ------ Post Dev 230.77 128,858 WET BASIN 2 WET BASIN 2.gpw Return Period: 10 Year Thursday, Jan 5 2023, 12:45 PM Hvdraflaw Hvdrooraohs by Inteiisolve Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 1 PRE -DEVELOPMENT Hydrograph type = Rational Storm frequency = 10 yrs Drainage area = 18.900 ac Intensity = 7.002 in/hr IDF Curve = Townsend Road IDF Chart.pdf Q (cfs) 40.00 30.00 20.00 — Hyd No. 1 0.1 PRE -DEVELOPMENT Hyd. No. 1 -- 10 Yr 0.2 Thursday, Jan 5 2023, 12*45 PM Peak discharge = 39.70 cfs Time interval = 1 min Runoff coeff. = 0.3 Tc by User = 8.00 min Asc/Rec limb fact = 1 /1 0.3 Hydrograph Volume = 19,056 cuft Q (cfs) 40.00 20.00 10.00 0.00 0.3 Time (hrs) 8 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Thursday, Jan 5 2023, 12:45 PM Hyd. No. 2 Post Dev Hydrograph type = Rational Peak discharge = 88.66 cfs Storm frequency = 10 yrs Time interval = 1 min Drainage area = 18.900 ac Runoff coeff. = 0.67 Intensity = 7.002 in/hr Tc by User = 8.00 min OF Curve = Townsend Road OF Chart.pdf Asc/Rec limb fact = 4.28/7.15 Q (cfs) 90.00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.0 0.2 - Hyd No. 2 Hydrograph Volume = 243,215 cuft Post Dev Hyd. No. 2 -- 10 Yr 0.3 0.5 0.7 0.8 1.0 1.2 1.3 1.5 Q (cfs) 90.00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 1.7 Time (hrs) Hydrograph Plot Hydraflow Hydrographs by Intelisolve Thursday, Jan 5 2023, 12:45 PM Hyd. No. 3 WET BASIN 2 Hydrograph type = Reservoir Peak discharge = 52.80 cfs Storm frequency = 10 yrs Time interval = 1 min Inflow hyd. No. = 2 Max. Elevation = 230.77 ft Reservoir name = WET BASIN 2 Max. Storage = 128,858 cuft Storage Indication method used. Hydrograph Volume = 232,382 cuft Q (cfs) 90.00 80.00 70.00 60.00 50.00 40.00 30.00 WET BASIN 2 Hyd. No. 3 -- 10 Yr Q (cfs) 90.00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 20.00 10.00 10.00 0.00 - 0.00 0.0 0.3 0.7 1.0 1.3 1.7 2.0 2.3 2.7 3.0 3.3 3.7 4.0 Hyd No. 3 - Hyd No. 2 Time (hrs) 10 Pond Report Hydraflow Hydrographs by Intelisolve Pond No. 1 - WET BASIN 2 Pond Data Pond storage is based on known contour areas. Average end area method used. Stage / Storage Table Thursday, Jan 5 2023, 12.45 PM Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cult) 0.00 226.00 20,303 0 0 0.50 226.50 19,092 9,849 9,849 1.00 227.00 24,899 10,998 20,847 2.00 228.00 26,800 25,850 46,696 3.00 229.00 28,758 27,779 74,475 4.00 230.00 30,772 29,765 104,240 5.00 231.00 32,842 31,807 136,047 6.00 232.00 34,965 33,904 169,951 Culvert / Orifice Structures Weir Structures [A] IB] [C] [D] [A] [B] [C] [D] Rise (in) = 24.00 3.00 8.00 0.00 Crest Len (ft) = 20.00 45.00 0.00 0.00 Span (in) = 24.00 3.00 24.00 0.00 Crest El. (ft) = 230.00 230.60 0.00 0.00 No. Barrels = 1 1 3 0 Weir Coeff. = 3.33 2.60 0.00 0.00 Invert El. (ft) = 221.00 226.00 228.00 0.00 Weir Type = Riser Broad --- --- Length (ft) = 60.00 0.50 0.50 0.00 Multi -Stage = Yes No No No Slope (%) = 0.50 0.00 0.01 0.00 N-Value = .013 .013 .013 .000 Orif. Coeff. = 0.60 0.60 0.60 0.00 Multi -Stage = n/a Yes Yes No Stage (ft) 6.00 5.00 4.00 3.00 Exfiltration = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 ft Stage / Discharge Note: Culvert/Orifice oufflows have been analyzed under inlet and outlet control. Stage (ft) 6.00 5.00 4.00 3.00 2.00 -ll� - 2.00 1.00 1.00 0.00 0.00 0.00 20.00 40.00 60.00 80.00 100.00 120.00 140.00 160.00 180.00 200.00 220.00 240.00 260.00 Total Q Discharge (cfs) 12 Hydrograph Summary Report ------------ Hyd. Hydrograph Peak Time Time to Volume Inflow No- type flow interval peak hyd(s) (origin) (cfs) (min) (min) (cult) 24,458 ---- 1 Rational 50.96 1 8 2 Rational 113.80 1 34 312,175 ---- 3 Reservoir 84.35 1 49 300.986 2 Maximum Maximum Hydrograph elevation storage description (ft) (cuft) ------ ------ PRE -DEVELOPMENT ------ ---- Post Dev 231.08 138,785 WET BASIN 2 WET BASIN 2.gpw Return Period: 100 Year Thursday, Jan 5 2023, 12:45 PM Hvdraflnw Hvrirnnranhc by InfRimn Nip Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 1 PRE -DEVELOPMENT Hydrograph type = Rational Storm frequency = 100 yrs Drainage area = 18.900 ac Intensity = 8.987 in/hr IDF Curve = Townsend Road IDF Chart.pdf Q (cfs) 60.00 50.00 40.00 30.00 10.00 Hyd No. 1 0.1 PRE -DEVELOPMENT Hyd. No. 1 -- 100 Yr 0.2 Thursday, .Jan 5 2023, 12:45 PM Peak discharge = 50.96 cfs Time interval = 1 min Runoff coeff. = 0.3 Tc by User = 8.00 min Asc/Rec limb fact = 1/1 0.3 Hydrograph Volume = 24,458 cuft Q (cfs) 60.00 50.00 40.00 30.00 M 10.00 - 0.00 0.3 Time (hrs) 13 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 2 Post Dev Hydrograph type = Rational Storm frequency = 100 yrs Drainage area = 18.900 ac Intensity = 8.987 in/hr OF Curve = Townsend Road IDF Chart.pdf Post Dev Hyd. No. 2 -- 100 Yr 100.00 :M 40.00 20.00 Thursday, Jan 5 2023, 12:45 PM Peak discharge = 113.80 cfs Time interval = 1 min Runoff coeff. = 0.67 Tc by User = 8.00 min Asc/Rec limb fact = 4.28/7.15 Hydrograph Volume = 312,175 cuft Q (cfs) 120.00 100.00 40.00 20.00 0.00 ` - -I-- I I I l— 0.00 0.0 0.2 0.3 0.5 0.7 0.8 1.0 1.2 1.3 1.5 1.7 Hyd No. 2 Time (hrs) 14 Hydrograph Plot Hydraflow Hydrographs by Intelisolve Hyd. No. 3 WET BASIN 2 Hydrograph type = Reservoir Storm frequency = 100 yrs Inflow hyd. No. = 2 Reservoir name = WET BASIN 2 Storage Indication method used 100.00 80.00 60.00 40.00 20.00 0.00 0.0 0.3 0.7 1.0 Hyd No. 3 WET BASIN 2 Hyd. No. 3 -- 100 Yr Thursday, Jan 5 2023, 12:45 PM Peak discharge = 84.35 cfs Time interval = 1 min Max. Elevation = 231.08 ft Max. Storage = 138,785 cuft Hydrograph Volume = 300,986 cuft Q (cfs) 120.00 100.00 :e fe 40.00 20.00 0.00 1.3 1.7 2.0 2.3 2.7 3.0 3.3 3.7 Hyd No. 2 Time (hrs) 15 Pond Report Hydraflow Hydrographs by Intelisolve Pond No. 1 - WET BASIN 2 Pond Data Pond storage is based on known contour areas. Average end area method used. Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sgft) Incr. Storage (cuft) Total storage (cult) 0.00 226.00 20,303 0 0 0.50 226.50 19,092 9,849 9,849 1.00 227.00 24,899 10,998 20,847 2.00 228.00 26,800 25,850 46,696 3.00 229.00 28,758 27,779 74,475 4.00 230.00 30,772 29,765 104,240 5.00 231.00 32,842 31,807 136,047 6.00 232.00 34,965 33,904 169,951 Culvert / Orifice Structures [A] [B] [C] [D] Rise (in) = 24.00 3.00 8.00 0.00 Span (in) = 24.00 3.00 24.00 0.00 No. Barrels = 1 1 3 0 Invert El. (ft) = 221.00 226.00 228.00 0.00 Length (ft) = 60.00 0.50 0.50 0.00 Slope (%) = 0.50 0 00 0.01 0.00 N-Value = .013 .013 .013 .000 Orif. Coeff. = 0.60 0.60 0.60 0.00 Multi -Stage = n/a Yes Yes No Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 Weir Structures Thursday, Jan 5 2023, 12:45 PM [A] [B] [C] [D] Crest Len (ft) = 20.00 4t, 00 0.00 0.00 Crest El. (ft) = 230.00 230.60 0.00 0.00 Weir Coeff. = 3.33 2.60 0.00 0.00 Weir Type = Riser Broad --- --- Multi-Stage = Yes No No No Exfiltration = 0.000 in/hr (Contour) Tailwater Elev. = 0.00 ft Stage / Discharge Note: Culvert/Orifice outflows have been analyzed under inlet and outlet control. Stage (ft) 6.00 5.00 4.00 3.00 2.00 1.00 16 0.00 r 1 1 1 I I I I I I I I I I 0.00 0.00 20.00 40.00 60.00 80.00 100.00 120.00 140.00 160.00 180.00 200.00 220.00 240.00 260.00 Total Q Discharge (cfs) Appendix C Appendix D y`! -- Ir ff �f J` ,•� ,O 0 co =1 �1 QML,1'd3N ciL rm BUCKEYE [3R I Y 00 O p 0 LO Lo N d' u7 N_ N O O O O a> c J E J co C) U M I•- N W - C W O O N N N Z m L_! L NC OneMap Parcels with Statewide Standardized AttribLites + HOKE COUNTY, NC X q f • r ��7 -• vim' _ `_ f y � Parcels 401 �1 901 0.4km ^J 0.2mi ki 1 PARNO 494550201060 ALTPARNO 2427 OWNNAME H&H INVESTMENTS INC _ IMPROVVAL 0.00 LANDVAL 0.00 PARVAL 924,930.00 MAILADD 2919 BREEZEWOOD AVE MUNIT� MCITY FAYETTEVILLE MSTATE NC I ` MZIP 28303-0000 4 SITEADD TOWNSEND RD r SUNIT % r --.r " -t - - Esri Community Mapf Map Parcels with State, HOKE COUNTY, NC h L 1I1YiS T 0.4km ^J 0.2mi 'andardized Attributes Rp"map Gallery Charted Territory Map Community Map A Human ��•— Geography Map Colored Pencil Map 0 Darr'.,ary Human Geography Dark Imagery Hybrid Gray Canvas (Light Mid -Century Map Modern Antique Map NAIP Imagery Hybrid National Geographic Style Navigation N: iriationfDark modi J M Newspaper Map Nova Map Oceans OpenStreetMap pi OpenStreetMap (Blueprint) Outline Map Streets Streets (Night) Terrain with Labels Topographic ire .rt I in .ate i i NC OneMap Parcels with Statewide Stalldaldized Attributt-S + HOKE COUNTY, NC X Q i'? r•. �' map raller ��_ ✓' .y V6 - Charted Territory Map HeiipaK tD'. J tY P r . � Community Ma II f f ,-��� ' �. r'-;ti Firefly Imagery i� � •r � 1 _ �- - Hybrid Human Geography Map Imagery Hybrid — M':d-Century Map NAIF Irnagery Hybrid 1 W �.i: rer II Navigation rr-`-. fP rp"� ry t - I f �i �I '�•1 :L4., ,i + A Newspaper Map I 1 Oceans OpenStreetMap (Blueprint) Streets Terrain with Labels r _ 0.4km 0.2mi USA Topo Maps Colored Pencil Map Dark Gray Canvas Human Geography Dark Imagery 1 � Light Gray Canvas IModern Antique Map I National Geographic Style Navigation (Da Mode) Nova Map �5 v -f OpenStreetMap lfr7�7_�l Outline Map a1mg Topographic TE USGS National Map r Appendix E Southeastern Soil & Environmental Associates, Inc. P.O. Box 9321 Fayetteville, NC 28311 Phone/Fax (910) 822-4540 Email mike@southeastemsoil.com August I5, 2022 Mr. Jeff Nobles, PE Larry King & Associates, RLS, PA 1333 Morganton Road, Suite 201 Fayetteville, NC 28305 Re: Hydraulic conductivity (permeability) analysis & seasonal water table determination (SHWT) for proposed stormwater retention/treatment areas, Tranquil Meadows, Townsend Rd., Hoke County, North Carolina Dear Mr. Nobles, An evaluation of soil properties and hydraulic conductivity (Ksat) has been conducted at your request on portions of the aforementioned property. The purpose of the investigation was to determine soil water table depths (SHWT) based on soil profiles. In addition, Ksat was to be provided at a depth 2.0 feet above the SHWT elevation for use with stormwater retention basin design. Saturated hydraulic conductivity of the unsaturated zone was measured in a similar method as described in the Soil Science Society of America Journal, Vol. 53, no 5, Sept. - Oct. 1989, "A Constant Permeameter for Measuring Saturated Hydraulic Conductivity of the Vadose Zone" and Comparison of the Glover Solution with the Simultaneous Equations Approach for Measuring Hydraulic Conductivity." This consists of advancing a small diameter bore hole to a predetermined depth (typically 2 feet above SHWT). At this depth, a constant head (pressure) was established and maintained. Flow measurements were made at timed intervals after flow stabilized. Soils at the proposed basin site are most similar to the Wagram (borings 1 & 2) and Candor soil series (borings 3 & 4; see attached boring logs). Four borings were advanced to at Ieast 8.0 feet below the soil surface. Seasonal High -Water Table (SHWT) as determined by evidence of colors of chroma 2 or less (and/or concentrations of high redox mottles) was encountered at depths ranging from 72 to 146 inches below the ground surface (see chart attached). SOIUSITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING • WETLANDS GROUNDWATER DRAINAGE/MOUNDING • SURFACE/SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN Four compact constant head permeameter (CCHP) tests were conducted at a depths of 2.00 feet above the SHWT levels. The measured Ksat rates ranged from 0.290 and 2.340 cm/hr. (equivalent to 0.114 to 0.921 inches/hour). The attached map shows locations of the sample points as well as Ksat locations. It should be noted that the reported SHWT does not necessarily reflect the elevation of static groundwater (due to variations in groundwater recharge rates, annual rainfall, drought conditions, etc.). The data presented in this report are limited by a number of considerations. The primary consideration is that soil formations can be highly variable. The soils found on this site can be subject to inclusions of other soil types, perched water, artesian conditions and/or layers of undulating low permeability clay seams. These and other soil conditions can have an effect on the steady state of groundwater flow. To the extent possible, we have identified the soil types that will impact the flow of groundwater, and have provided a professional opinion as to the depth of SHWT. I trust this is the information you require at this time. Sincerely, kze�A-- Mike Eaker NC Licensed Soil Scientist #1030 pypy � SOX Sr,tP ti `k'�.,r11r t p� Southeastern Soil & Environmental Associates, Inc. P.O. Box 9321 Fayetteville, NC 28311 Phone/Fax (910) 822-4540 Email mike@Southeasternsoil.com SHWT and Observed Water Depths, Tranquil Meadows, Townsend Rd., Hoke County, NC BORING SHWT DEPT SHWT DEPT GROUND ELEVATION OBSERVED WATER Inches msi - feet msl - feet msl - feet 1 72 222.49 228.49 None 2 85 220.81 227.89 None 3 104 216.06 224.73 None 4 146 215.04 227.21 None SOIL/SITE EVALUATION - SOIL PHYSICAL ANALYSIS - LAND USE/SUBDIVISION PLANNING - WETLANDS GROUNDWATER DRAINAGE/MOUNDING - SURFACE/SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN Southeastern Soil & Environmental Associates, Inc. P.O. Box 9321 Fayetteville, NC 28311 Phone/Fax (910) 822-4540 Email mike@southeasternsoil.com Measured Ksat Rates, Tranquil Meadows, Townsend Rd., Hoke County, NC Ksat Ksat Location Depth in cm/hr in/hr Bore 1 48 0.386 0.152 Bore 2 61 0.290 0.114 Bore 3 80 1.594 0.627 Bore 4 120 2.340 0.921 SOIUSITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING • WETLANDS GROUNDWATER DRAINAGE/MOUNDING • SURFACEISUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN Southeastern Soil & Environmental Associates, Inc. P.O. Box 9321 Fayetteville, NC 28311 Phone/Fax (910) 822-4540 Email mike@southeasternsoll.com Typical Soil Boring Log (Boring 1, 2), Tranquil Acres, Townsend Rd., Hoke County, NC This map unit consists of well drained soils that formed in loamy sediment on uplands. Slope ranged from 2 to 5 percent. A - 0 to 8 inches; brown (I OYR 5/3) loamy sand; single grained; loose; very friable; common fine and medium roots; abrupt smooth boundary. E - 8 to 20 inches; yellowish brown (I OYR 5/4) loamy sand; about 10 percent clean sand; single grained; loose; very friable; few fine and medium roots; clear smooth boundary. Btl - 20 to 53 inches; strong brown (7.5YR 5/8) sandy clay; moderate medium subangular blocky structure; firm; gradual diffuse smooth boundary. Bt2 — 53 to 67 inches; strong brown (7.5YR 5/8) sandy clay loam; few, medium, distinct white (1 OYR 8/1) mottles; moderate medium subangular blocky structure; firm; gradual wavy boundary. BC - 67 to 75 inches; strong brown (7.5YR 5/8) loamy sand; approximately 30 percent clean sand; massive structure; very friable; clear smooth boundary. CI - 75 to 85 inches; mixed strong brown (7.5YR 5/8) and yellowish brown (I OYR 5/8) loamy sand; very friable; clear smooth boundary. C2 - 85 to 96 inches; yellowish brown (2.5Y 5/6) sandy clay loam; many medium prominent light gray (1 OYR 7/1) mottles; massive structure; firm. SHWT @ 72 inches (I OYR 7/1) in boring 1 SHWT @ 85 inches (I OYR 7/1) in boring 2 SOIUSITE EVALUATION - SOIL PHYSICAL ANALYSIS - LAND USE/SUBDIVISION PLANNING - WETLANDS GROUNDWATER DRAINAGE/MOUNDING - SURFACE/SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN Southeastern Soil & Environmental Associates, Inc. P.O. Box 9321 Fayetteville, NC 28311 Phone/Fax (910) 822-4540 Email mike@southeasternsoil.com Soil Profile Description (Boring 3), Tranquil Meadows, Townsend Rd., Hoke County, NC This map unit consists of gently sloping well drained soils that formed in sandy and loamy sediment on uplands. Slopes range from 1 to 3 percent. A - 0 to 18 inches; grayish brown (10YR 5/2) loamy sand; weak fine granular structure; very friable; common fine roots; abrupt smooth boundary. E -18 to 46 inches; yellowish brown (1 OYR 5/4) loamy sand; weak fine granular structure; very friable; few fine roots; clear wavy boundary. Btl - 46 to 65 inches; yellowish brown (10YR 5/8) sandy clay loam; moderate medium subangular blocky structure; firm; gradual diftse boundary. Bt2 - 65 to 104 inches; yellowish brown (10YR 5/8) sandy loam; weak fine subangular blocky structure; friable; gradual diffuse boundary. BC - 104 to 118 inches; mixed yellowish brown (10YR 5/8) and brownish yellow (10YR 6/8) loamy sand; many medium prominent light gray (IOYR 7/1) mottles; massive structure; very friable. SHWT @ 104 inches below ground surface (IOYR 7/1) SOIUSITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING - WETLANDS GROUNDWATER DRAINAGE/MOUNDING • SURFACE/SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN Southeastern Soil & Environmental Associates, Inc. P.O. Box 9321 Fayetteville, NC 28311 Phone/Fax (910) 822-4540 Email mike@southeasternsoil.com Soil Profile Description (Boring 4), Tranquil Meadows, Townsend Rd., Hoke County, NC This map unit consists of gently sloping well drained soils that formed in sandy and loamy sediment on uplands. Slopes range from 1 to 3 percent. A - 0 to 6 inches; brown (IOYR 4/3) loamy sand; weak fine granular structure; very friable; common fine roots; abrupt smooth boundary. E - 6 to 40 inches; yellowish brown (IOYR 5/4) loamy sand; weak fine granular structure; very friable; few fine roots; clear wavy boundary. Bt 1 - 40 to 80 inches; yellowish brown (10YR 5/6) sandy clay loam; moderate medium subangular blocky structure; firm; gradual diffuse boundary. Bt2 - 80 to 94 inches; strong brown (7.5YR 5/8) sandy loam; weak fine subangular blocky structure; friable; gradual diffuse boundary. E' - 94 to 136 inches; yellowish brown (IOYR 5/8) loamy sand; massive structure; very friable; gradual diffuse boundary. BC - 136 to 146 inches; mixed brownish yellow (IOYR 6/8) and strong brown (7.5YR 518) loamy sand; massive structure; very friable. C -146 to 155 inches; mixed gray (10YR 6/1) and light gray (10YR 7/1) loamy sand; massive structure; very friable. SHWT @ 146 inches below ground surface (IOYR 7/1) SOIUSITE EVALUATION - SOIL PHYSICAL ANALYSIS - LAND USE/SUBDIVISION PLANNING - WETLANDS GROUNDWATER DRAINAGE/MOUNDING - SURFACE/SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN 0 L—v 13V & AMOC&OW LU. PA: 0lion C.0 ","F.jnCj40,= Appendix F BUSINESS CORPORATION ANNUAL REPORT NAME OF BUSINESS CORPORATION: H & H INVESTMENTS, INC. SECRETARY OF STATE ID NUMBER: 0486096 STATE OF FORMATION: NC REPORT FOR THE FISCAL YEAR END: 12/31/2021 SECTION A: REGISTERED AGENT'S INFORMATION 1. NAME OF REGISTERED AGENT: Huff, D Ralph III 2. SIGNATURE OF THE NEW REGISTERED AGENT: AMENDING DOC ID Filing Office Use Only E - Filed Annual Report 0486096 CA202207502589 3/16/2022 10:45 nX Changes SIGNATURE CONSTITUTES CONSENT TO THE APPOINTMENT 3. REGISTERED AGENT OFFICE STREET ADDRESS & COUNTY 4. REGISTERED AGENT OFFICE MAILING ADDRESS 2919 Breezewood Avenue, Suite 100 2919 Breezewood Avenue, Suite 100 Fayetteville, NC 28303-5283 Cumberland County Fayetteville, NC 28303-5283 SECTION B: PRINCIPAL OFFICE INFORMATION 1. DESCRIPTION OF NATURE OF BUSINESS: Land Development 2. PRINCIPAL OFFICE PHONE NUMBER: (910) 302-3608 3. PRINCIPAL OFFICE EMAIL: Privacy Redaction 4. PRINCIPAL OFFICE STREET ADDRESS 5, PRINCIPAL OFFICE MAILING ADDRESS 2919 Breezewood Avenue, Suite 100 2919 Breezewood Avenue, Suite 100 Fayetteville, NC 28303-5283 Fayetteville, NC 28303-5283 6. Select one of the following if applicable. (Optional see instructions) ❑ The company is a veteran -owned small business ❑ The company is a service -disabled veteran -owned small business SECTION C: OFFICERS (Enter additional officers in Section E.) NAME: Ronald S. Huff TITLE: Vice President NAME: D Ralph Huff , III TITLE: President ADDRESS: 2919 Breezewood Avenue ADDRESS: 2919 Breezewood Ave Ste 100 Ste. 100 Fayetteville, NC 28303 Favetteville, NC 28303 NAME: TITLE: ADDRESS: SECTION D: CERTIFICATION OF ANNUAL REPORT. Section D must be completed in its entirety by a person/business enthalph Huff III 3/16/2022 SIGNATURE DATE Form must be signed by an officer listed under Section C of this form. D Ralph Huff III President Print or Type Name of Officer Print or Type Title of Officer This Annual Report has been filed electronically. MAIL TO: Secretary of State, Business Registration Division, Post Office Box 29525. Raleigh, NC 27626-0525 E BK 1415 PG 0858 This certifies that pin: 494550001013; is free of any delinquent ad valorem Tax liens charged to the Hoke County Tax Collector; but does not certify that the deed description matches the PIN. Sheretta Walker Collection Clerk Signature Date: 12/10/2021 NCGS 161-31 FILED ELECTRONICALLY HOKE COUNTY NC CAMILLE HURST REGISTER OF DEEDS FILED Dec 13, 2021 AT 10:57:43 AM BOOK 01415 START PAGE 0858 END PAGE 0862 INSTRUMENT # 11788 EXCISE TAX $2,186.00 LMM NORTH CAROLINA GENERAL WARRANTY DEED Excise Tax: $2,186.00 Brief Description: 69.7 acres on Townsend Road Parcel ID: 49455-00-C1-013 Mail after recording to: WMFS 112 E. Edinborough Avenue, Raeford, NC 28376 This instrument was prepared by: Willcox, McFadyen, Fields & Sutherland, PLLC THIS DEED made this >'� ` day of ; j 2021 by and between GRANTOR Ronald L. Peeler and spouse, Janeile A. Peeler' 1308 Burl Woods Court Bowling Green, KY 42103 The Grantors listed above designated with "*' are signing solely to convey their marital interest in the property. GRANTEE H & H Investments, Inc. A North Carolina Corporation 2919 Breezewood Avenue, Suite 100 Fayetteville, NC 28303 The designation Grantor and Grantee as used herein shall include said parties, their heirs, successors, and assigns, and shall include singular, plural, masculine. feminine or neuter as required by context. WITNESSETH, that the Grantor, for a valuable consideration paid by the Grantee, the receipt of which is hereby acknowledged, has and by these presents does grant, bargain, sell and convey unto the Grantee in fee simple, all that certain lot or parcel of land and more particularly described as follows: SEE ATTACHED SCHEDULE "A" TO HAVE AND TO HOLD the aforesaid lot or parcel of land and all privileges and appurtenances thereto belonging to the Grantee in fee simple. Submitted electronically by "Willcox, MCFadyen, Fields & Sutherland PLLC" in compliance with North caroling statutes governing recordable documents and the terms of the Memorandum of understanding with the office of the Register of Deeds of Hoke county. NCGS 47-14(a1)(5). BK 1415 PG 0859 And the Grantor covenants with the Grantee, that Grantor is seized of the premises in fee simple, has the right to convey the same in fee simple, that title is marketable and free and clear of all encumbrances, and that Grantor will warrant and deferd the title against the lawful claims of all persons whomsoever except for the exceptions hereinafter stated. This conveyance is made subject to enforceable reservations, easements, restrictions and covenants of record, matters shown on the above plat, ad valorem taxes for the current year, and zoning or other municipal ordinances. IN WITNESS WHEREOF, the Grantor has hereunto set his hand and seal, or if corporate, has caused this instrument to be signed in its corporate name by its duly authorized officer(s), the day and year first above written. L. Peeler SE.AL1 Janelle A. STATE OF C COUNTY OF I certify that the following person(s) personally appeared before me this day. each acknowledging to me that he or she signed the foregoing document: Ronald L. Peeler Witness my hand and official stamp or seal, this the ..-_�L��I� ^ day of2021. My Commission Expires: D .-? C0 - 7c:7 lv STATE OF C COUNTY OF OLq, ^ / hAC Nbfary Publ" ECAITLYNN J �iVALKERR' uf3LIC ND COUNTY, NC I certify that the following person(s� personally appeared before me this day, each acknowledging to me that he or she signed the foregoing document: Janelle A. Peeler Witness my hand and official stamp or seal, this the 1 C34-1 My Commission Expires: LL? (4) •- 2 ,2(0 day of p� im i� �, , 2021. Coll di UV `'1v! , Notary ubl�' CAITLYNN J WALKER NOTARYPU13LIC CUMBERLAND COUNTY, NC BK 1415 PG 0860 FS ENGINEERING - SURVEYING - DESIGNING - DRAFTING Larry King & Associates, R.L.S., P.A. P.O. Box 53787 1333 Morganton Road, Suite 201 Fayetteville, North Carolina 28305 P. (910) 483-4300 F. (910) 483-4052 www.LKandA.com NC Firm License C-0887 December 8, 2021 LEGAL DESCRIPTION H& 11 INVESTMENTS, LLC "PEELER PROPERTY" TOWNSEND ROAD HOKE COUNTY 63.94 ACRES LYING in McLaughin Township, Hoke County, North Carolina, this subject tract being bounded on the north by: the tract as conveyed to Ronald L. Peeler, as described and recorded in Deed Book 361. Page 406, Hoke County Registry, by the tract as conveyed to Jeffrey W. Baldwin, as described and recorded in Deed Book 309, Page 523, Hoke County Registry, by the tract as conveyed to Hoke Partners, LLC, as described and recorded in Deed Book 584. Page 190. 1 ioke ('ount� Registry, and by the tract as conveyed to Hoke Partners, LLC, as described and recorded in Deed Book 585, Page 369, Hoke County Registry; bounded on the east by: the tract as conveyed to Larry H. Haire and Marian A. Haire, as described and recorded in Deed Book 1161, Page 81, Hoke County Registry and by the tract as conveyed to [_,essie C. Ross et al, as described and recorded in Deed Book 252, Page 725, Hoke County Registry; bounded on the south by: the tract as conveyed to Frank A. Burkes and Pearlie C. Burkes, as described and recorded in Deed Book 254. Page 581, Hoke County Registry. by the tract as conveyed to Maebuilt, Inc., as described and recorded in Deed Book 1336, Page 505. Hoke County Registry, by the tract as conveyed to Robert W. Burley and Rochelle Burley, as described and recorded in Deed Book 1267, Page 801. Hoke County Registry, by the tract as conveyed to Thurman Lee Rogers, Jr., as described and recorded in Deed Book 1343. Page 400, Hoke County Registry, and by the tract as conveyed to Larry C. Campbell, as described and recorded in Deed Book 208, Page 567, Hoke County Registry, bounded on the west by the eastern right of way margin of Townsend Road, S.R. 1410, a 60 foot public right of way, and being more particularly described as follows: BK1415PG0861 COMMENCING from an existing iron rod, the southernmost corner of Lot 6, "\V.C. Ray Estate Lands" as described and recorded in Slide 331, Map 4, Hoke County Registry, said iron rod also being the TRUE P(lI NT AND 131 ICE OF BEGINNING; THENCE South 73 degrees 52 minutes 23 seconds East for a distance of 170.54 feet to an existing iron rebar; THENCE South 66 degrees 31 minutes 18 seconds East for a distance of 98.12 feet to an existing iron rebar; THENCE South 65 degrees 39 minutes 15 seconds East for a distance of 240.62 feet to an existing NCD{ T nai I: THENCE ;ioulh 67 degrees 53 minutes 47 seconds East for a distance of 168.75 feet to an existing NCDOT nail; THENCE South 39 degrees 16 minutes 13 seconds East for a distance of 208.91 fee[ to an existing nail in stump; THENCE South 40 degrees 59 minutes 48 seconds East for a distance of 215.09 feet to an existing nail in stump; THENCE South 57 degrees 16 minutes 37 seconLIs East for a distance ol' 186.42 feet to an existing iron rebar, THENCE South 46 degrees 4 ; minutes 35 seconds East for a distance of 240.36 feet to an existing plow sweep blade . THENCE South 15 degrees 34 minutes 14 seconds East for a distance ol'777.75 feet to an existing iron pipe; THENCE South 21 degrees 431 minutes 01 seconds East for a distance of 121.67 feet to an existing iron pipe; THENCE South 21 degrees 53 minutes 07 seconds last for a distance of 212.33 feet to a point; THENCE South 26 degrees 17 minutes 39 seconds West for a distance of 162.40 feet to a point; THENCE South 47 degrees 15 minutes 14 seconds West for a distance of 72.79 feet to an existing iron rebar; THENCE South 74 degrees 41 minutes 09 seconds West for a distance of 280.64 feet to an existing iron pipe; THENCE South 74 degrees 43 minutes 16 seconds ';Vest for a distance of 354.99 feet to an existing iron pipe; THENCE South 74 degrees 25 minutes 51 seconds West for a distance of 105.38 feet to an existing iron rebar: THENCE South 74 degrees 50 minutes 50 seconds West for a distance of 413.78 feet to a set iron rebar located in the eastern right of way margin of Townsend Road; THENCE as and with the eastern right of way margin of Townsend Road, the following bearings and distances: North 13 degrees 55 minutes 17 seconds West for a distance of 155.42 feet to a set iron rebar; North 17 degrees 41 minutes 02 seconds West for a distance of 267.32 feet to a set iron rebar; North 17 degrees 44 minutes 16 seconds West for a distance of 1659.36 feet to a set iron rebar; North 17 degrees 40 minutes 37 seconds West for a distance of 553.71 feet to a set iron rebar; BK1415PG0862 THENCE and leaving the eastern right of way margin of Townsend Road, South 75 degrees 55 minutes 03 seconds East for a distance of 478.56 feet to an existing iron rod, said iron rod also being the TRUE POINT AND PLACE OF BEGINNING. Together with and subject to covenants, easements, and restrictions of record. Said property contains 63.94 acres (2,785,046 square feet). This description prepared by Larry King & Associates, R.L.S., P.A. on this day,t December 08, 2021, under the supervision of W. Larry King, a Professional H O,y Surveyor. y�`'t� p'',: r° s 1 S ,7 W. Larry Ki , P.L.S., 339 ��rrrrm�►►►►► -( ON, IN i I'sk ,User Input Data Calculated Value Reference Data Designed By: JAN, PE Date: 3/22/2023 Checked By: Date: Company: Larry King & Assoc. Project Name: Tranquil Meadows Phase 1 Project No.: Site Location (City/Town) Hoke County, NC Culvert Id. HW-1 Total Drainage Area (acres) 20 Step Z. Determine the tailwater depth from ch�umel characteristics below the pipe outlet for the &sign capacity of the pipe If the tailwater depth is less than half the outlet pipe diameter. it is classified mimmum tailwater condition. If it is greater than half the pipe dsanireter. it is classified inaximum condition. Pipes that outlet onto .vide fiat areas with no defined channel are assitmed to have a imiuin ini tailwater condition unless rehable flood stage elevations shoe- othenvise. Outlet pipe diameter, Do (in.) Tailwater depth (in.) Minimum/Maximum tailwater? Discharge (cfs) Velocity (ft./s) EN 0 Min TW (Fig. 8.06a) 86.8 8.5 Step 2. BaSed on the tailwater conditions determined in step 1. enter Figure 8.06a or Figure 8 06b and deternime d;r, riprap size and imnimuni apron length (La) The d,. size is the median Stone size in a well -graded nprap apron. Step 3. Determine apron width at the pipe outlet. the apron shape. and the apron width at the outlet end from the same figure used in Step ?_ Minimum TW Figure 8.06a Riprap d50, (ft.) 0.9 Maximum TW Figure 8.06b Minimum apron length, La (ft.) 26 Apron width at pipe outlet (ft.) 12 12 Apron shape Apron width at outlet end (ft.) 30 4 Step 4. Determine the niamm nri stone dj uiiet .,z d,.,. = 1 5 x d5r Minimum TW Max Stone Diameter, dmax (ft.) 1.35 Step 5. Deternune the apron thickness Apron Thickness(ft.) Apron thickness = 1 5 x d Minimum TW 2.025 Maximum TW 0 Maximum TW 0 Step 6. Fit the tipiap apron to the site bti• iruiking it level fot the ntsntnttu. length L,. from Figure 8 46a or Figure 8 06b Extend the apron fattlirt downstream and alone chantiel banks tuittl stabiht v is assured Deep the apron as straight as possible and ahgn it with the flow of the recen-uie stream. Make any necessitry alipunent beads near tlSe pipe outlet so tlu-tt the entrance into the receivuig stream is straight Some locations may regture lisu ng of the entire channel cross section to assure stability It n>ay be necessary to uicrease the Size of irprap inhere protection of the chuuxel side slopes is necessary" (Appe;i it S.05) 'Where overfalls evst at pipe outlets or flows tie excessive. a plunge pool should be considered. see page S.06.8 User Input Data Calculated Value Reference Data Designed By: JAN, PE Date: 3/22/2023 Checked By: Date: Company: Larry King & Assoc. Project Name: Tranquil Meadows Phase 1 Project No.: Site Location (City/Town) Hoke county, NC Culvert Id. Pond Outlet Total Drainage Area (acres) 20 Step 2. Determine the tailwater depth from channel characteristics below the pipe outlet for the design capacity of the pipe If the tailwater depth is less than half the outlet pipe diameter, it is classified minimum tailwater condition. If it is greater than half the pipe diameter, it is classified maximum condition. Pipes that outlet onto %vide fiat areas with no defined channel are assumed to have a iiiininnun tailwater condition unless reliable flood stage elevations Shod- otherwise Outlet pipe diameter, Do (in.) Tailwater depth (in.) Minimum/Maximum tailwater? Discharge (cfs) Velocity (ft./s) 36 0 Min TW (Fig. 8.06a) 54 15 Step 2. Based on die tailnvater conditions determined in step 1. enter Figure 8.06a or Figure 8.06b, and determine d., riprap size and minimum apron length (La) The d- size is the median stone size in a well -graded nprap apron_ Step 3. Determine apron width at the pipe outlet, the apron shape. and the apron width at the outlet end from the same figure used in Step ?_ Minimum TW Figure 8.06a Riprap d50, (ft.) 0.6 Maximum TW Figure 8.06b Minimum apron length, La (ft.) 20 Apron width at pipe outlet (ft.) 9 9 Apron shape Apron width at outlet end (ft.) 23 3 step 4. Derernune the niaxinnini stone di uneter dM„ = 1.5 x d� Minimum TW Max Stone Diameter, dmax (ft.) 0.9 Step 5. Deteniune the apron thickness Apron Thickness(ft.) Apron thickness = 1.5 x d_„ Minimum TW 1.35 Maximum TW 0 Maximum TW 0 Step 6. Fit the riprap apron to the site by nkak.ing it level for the nuniniuui length L, front Figure 8 06a of Figure 8 06b Extend the apron farther dournstreanl and along chaimel banks, until stabdity is assured Keep the apron as 5traigLt as possible quid ahark it with the from.- of the receiving stream .lake ant- necessary aligmueni bends near the pipe outlet so that the entrance into the receiving stream is straight Some locations may require lining of the entire chaiuiel cross section to i�-�urte stability It inav be necessary to increase the size of riprap where protection of the channel side slopes is, necessum- (Appo;dii S.QS) `klere overfalls em'st at pipe outlets or flows are excessive a plunge pool should be considered. see page S.06.8 Tranquil Meadows Phase 1 Impervious Areas Calculations Lots 3200 sf/lot * 75 lots = 240,000 sf Streets To be constructed in Phase 1 = 95,876 sf Mailbox Kiosk Lots 2900 sf/lot * 2 ea = 5,800 sf Sidewalks To be constructed in Phase 1 = 30,661 sf Total Impervious Area to be Constructed in Phase 1= 372,337 sf