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HomeMy WebLinkAboutSW4200601_12052-Southwick Solar LLC-NCDEQ SW Revisions-Calcs-2020-08-07_20200807OAKWOOD SOLAR FARM, LLC EROSION CONTROL AND STORMWATER CALCULATIONS JUNE 11 th, 2020 REVISED AUGUST 5th, 2020 e •: PINE GATE RENEWABLES, LLC 130 ROBERTS STREET ASHEVILLE, NC 28801 JEFF HUNTLEY (828) 777-6152 168 PATTON AVENUE / ASHEVILLE, NO 28MI ° SS, O ��A / PHONE (828) 252-MM JJ 'v FAX (828)252-5385 Zo Q �9<e� SEAL - Civil - 035093 - Design 52 WALNUT STREET - SUITE 9 i 00 � \C Concepts, PA WA28786 PHONE(B28YNESIALLE, NC-4410 PHONE (828) 452-4418 NCEIELS LICENSE 4: C-2184 www dAId-ig.—ncepts.c— FAX (828) 456-5455 RY° °R ° Np C\• JOB N0. 12056 OAKWOOD SOLAR FARM, LLC CDC Proj ect No.: 12056 CDCCR.Tig. Concepts, PA TABLE OF CONTENTS 1. Project Narrative 2. Checklist 3. Drainage Area Maps 4. Drainage Runoff Summary S. Stormwater Peak Flow Calculations 6. Temporary Skimmer Basin Calculations 7. Temporary Ditch Calculations 8. Rip Rap Aprons 9. NRCS Soil Report 10. Figures 1. USGS Topo Map 11. FEMA FIRMette Map 111. NOAA Precipitation Intensity Table IV. NOAA Precipitation Depth Table V. Deed VI. Permission to Disturb Letter Mailing Address: P.O. Box 5432, Asheville, NC 28813 168 Patton Avenue Asheville, NC 28801 52 Walnut Street— Suite 9, Waynesville, NC 28786 Phone 828-252-5388 Fax 828-252-5365 Phone: 828-452-4410 Fax: 828-456-5455 l0 "go CDCC,D ivil eignoncepts, RSA Project Name: OAKWOOD SOLAR FARM, LLC Project Location: 6519 US HWY 70 MEBANE, NC 27302 CDC Project No. 12056 Date: August 5th, 2020 PROJECT NARRATIVE General The proposed OAKWOOD SOLAR FARM, LLC project encompass an approximate area of 52.1 acres, 32 acres of which is disturbed. The proposed plan will involve the construction of a solar array field with an access gravel road, security fencing and landscape buffers. The project area was logged in the early 2000's. The site's current condition is best described as forest in the early -mid stages of re-establishment with dense underbrush. Erosion Control Proposed erosion control measures consist of a construction entrance, silt fence, temporary diversion ditches, temporary skimmer sediment basins, and temporary/permanent seeding to prevent sediment from leaving the site. The project is located in the Cape Fear River Basin. We do not anticipate any negative downstream impacts due to the discharge from the site. Stormwater The project is low density and will result in a reduction in flow -rates for the 1-year, 24-hour and 10-year, 24-hour storm events as shown in the included calculations. The proposed land use is best characterized as a meadow which is protected from grazing. The grass is typically allowed to grow to a height of 12-18 inches before cutting and it will be maintained in a dense state. Sheet flow is encouraged. As a result, permanent stormwater control measures are not required or proposed. Mailing Address: P.O. Box 5432, Asheville, NC 28813 168 Patton Avenue, Asheville, NC 28801 52 Walnut Street — Suite 9, Waynesville, NC 28786 Phone 828-252-5388 Fax 828-252-5365 Phone: 828-452-4410 Fax: 828-456-5455 4:16MNUF1T&1l4QILYi140kfilVQ01[K•]01r1:l•]N»el011:JN44ILYilILIVil dNNVJIATITcd:Ixd:aF.11 The following items shall be incorporated with respect to specific site conditions, in an erosion & sedimentation control plan: NPDES Construction Stormwater General Permit NCG010000 Designation on the plans where the 7 or 14 day ground stabilization requirements apply per Part II.E.1 of the permit. Design of basins with one acre or more of drainage area for surface withdrawal as per Part II.B.8 of the permit. LOCATION INFORMATION ✓ Project location & labeled vicinity map (roads, streets, landmarks) ✓ North arrow and scale ✓ Identify River Basin. ✓ Provide a copy of site located on applicable USGS quadrangle and NRCS Soils maps if it is in a River Basin with Riparian Buffer requirements. GENERAL SITE FEATURES (Plan elements) ✓ Property lines & ownership ID for adjoining properties ✓ Existing contours (topographic lines) ✓ Proposed contours ✓ Limits of disturbed area (provide acreage total, delineate limits, and label). Be sure to include all access to measures, lots that will be disturbed, and utilities that may extend offsite. ✓ Planned and existing building locations and elevations ✓ Planned & existing road locations & elevations, including temporary access roads Lot and/or building numbers ✓ Hydrogeologic features: rock outcrops, seeps, springs, wetland and their limits, streams, lakes, ponds, dams, etc. (include all required local or state buffer zones and any DWQ Riparian Buffer determinations) ✓ Easements and drainageways, particularly required for offsite affected areas. Include copies of any recorded easements and/or agreements with adjoining property owners. ✓ Profiles of streets, utilities, ditch lines, etc. N/A Stockpiled topsoil or subsoil locations N/A If the same person conducts the land -disturbing activity & any related borrow or waste activity, the related borrow or waste activity shall constitute part of the land -disturbing activity unless the borrow or waste activity is regulated under the Mining Act of 1971, or is a landfill regulated by the Division of Waste Management. If the land -disturbing activity and any related borrow or waste activity are not conducted by the same person, they shall be considered separate land -disturbing activities and must be permitted either through the Sedimentation Pollution Control Act as a one -use borrow site or through the Mining Act. N/A Location and details associated with any onsite stone crushing or other processing of material excavated. If the affected area associated with excavation, processing, stockpiles and transport of such materials will comprise 1 or more acres, and materials will be leaving the development tract, a mining permit will be required. N/A Required Army Corps 404 permit and Water Quality 401 certification (e.g. stream disturbances over 150 linear feet) EROSION & SEDIMENT CONTROL MEASURES (on plan) ✓ Legend (provide appropriate symbols for all measures and reference them to the construction details) ✓ Location of temporary measures ✓ Location of permanent measures ✓ Construction drawings and details for temporary and permanent measures. Show measures to scale on plan and include proposed contours where necessary. Ensure design storage requirements are maintained through all phases of construction. ✓ Maintenance requirements for measures ✓ Contact person responsible for maintenance SITE DRAINAGE FEATURES ✓ Existing and planned drainage patterns (include off -site areas that drain through project and address temporary and permanent conveyance of stormwater over graded slopes) ✓ Method used to determine acreage of land being disturbed and drainage areas to all proposed measures (e.g. delineation map) ✓ Size, pipe material and location of culverts and sewers ✓ Soil information: type, special characteristics ✓ Soil information below culvert storm outlets Name and classification of receiving water course or name of municipal operator (only where stormwater discharges are to occur) STORMWATER CALCULATIONS ✓ Pre -construction runoff calculations for each outlet from the site (at peak discharge points). Be sure to provide all supporting data for the computation methods used (rainfall data for required storm events, time of concentration/storm duration, and runoff coefficients). ✓ Design calculations for peak discharges of runoff (including the construction phase & the final runoff coefficients for the site) N/A Design calcs for culverts and storm sewers (include HW, TW and outlet velocities) ✓ Discharge and velocity calculations for open channel and ditch flows (easement & rights -of -way) ✓ Design calcs for cross sections and method of stabilization for existing and planned channels (include temporary linings). Include appropriate permissible velocity and/or shear stress data. ✓ Design calcs and construction details for energy dissipaters below culvert and storm sewer outlets (include stone/material specs & apron dimensions). Avoid discharges on fill slopes. ✓ Design calcs and dimension of sediment basins (note current surface area and dewatering standards as well as diversion of runoff to the basins). Be sure that all surface drains, including ditches and berms, will have positive drainage to the basins. VEGETATIVE STABILIZATION ✓ Area & acreage to be stabilized with vegetation ✓ Method of soil preparation ✓ Seed type & rates (temporary & permanent) ✓ Fertilizer type and rates ✓ Mulch type and rates (include mulch anchoring methods) NOTE: Plan should include provisions for groundcover in accordance with NPDES Construction Stormwater General Permit NCG010000. FINANCIAL RESPONSIBILITY/OWNERSHIP FORM ✓ Completed, signed & notarized FR/O Form ✓ Accurate application fee payable to NCDEQ ($65.00 per acre rounded up the next acre with no ceiling amount) N/A Certificate of assumed name, if the owner is a partnership N/A Name of Registered Agent (if applicable) ✓ Copy of the most current Deed for the site. Please make sure the deed(s) and ownership information are consistent between the plan sheets, local records and this form. ✓ Provide latitude & longitude (in decimal degrees) at the project entrance. ✓ Two hard -copies of the plans (some regional offices require additional plans or multiple sizes; please contact the regional coordinator prior to such submittal.) NOTE: For the Express Permitting Option, inquire at the local Regional Office for availability. Express Reviews are performed by appointment only. NARRATIVE AND CONSTRUCTION SEQUENCE ✓ Narrative describing the nature & purpose of the construction activity. ✓ Construction sequence related to erosion and sediment control (including installation of critical measures prior to the initiation of the land -disturbing activity & removal of measures after areas they serve are permanently stabilized). Address all phases of construction and necessary practices associated with temporary stream bypasses and/or crossings. N/A Bid specifications related only to erosion control rev. 05142019 e 8S � r fir L es' N G w m Q a z LPL e eS z 1 J L \ I O c Cl) . ms I I d1lb O CD N O N H N a I I I I I I O u, 0 cIVII IaeSign Gancepts, RSA. SummaryDrainage Runoff Oakwood Solar Farm, LLC CDC Proj ect No.: 12056 Drainage Area Pre -Area (ac.) Post -Area (ac.) Pre -Construction Peak Runoff (cfs) Post Construction Peak Runoff cfs % Increase DA1 7.37 10.64 1.20 0.92 -23% DA2 7.2 3.93 0.81 0.47 -42% DA3 7.14 8.73 1.07 0.77 -28% DA4 8.47 6.88 1.09 0.78 -28% Total 30.2 30.2 4.2 2.9 Drainage Area Pre -Area (ac.) Post -Area (ac.) Pre -Construction Peak Runoff (cfs) Post Construction Peak Runoff cfs % Increase DA1 7.37 10.64 14.77 12.58 -15% DA2 7.2 3.93 9.82 7.98 DA3 7.14 8.73 13.36 12.99 t-3 DA4 8.47 6.88 13.51 11.29 Total 30.2 30.2 51.5 44.8 Note: Information calculated using HydroCAD software. Issued 8/5/2020 N/ NJ 1 S 2S Vn-! C 4S DA 1 DA 2 DA 3 DA 4 Subcat Reach on Link Routing Diagram for Oakwood Pre -construction Prepared by Civil Design Concepts, PA, Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Oakwood Pre -construction Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (s u bcatch me nt-n u m be rs) 30.180 60 Woods, Fair, HSG B (1 S, 2S, 3S, 4S) 30.180 60 TOTAL AREA Oakwood Pre -construction Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 30.180 HSG B 1 S, 2S, 3S, 4S 0.000 HSG C 0.000 HSG D 0.000 Other 30.180 TOTAL AREA Oakwood Pre -construction Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 30.180 0.000 0.000 0.000 30.180 Woods, Fair 1 S, 2S, 3S, 4S 0.000 30.180 0.000 0.000 0.000 30.180 TOTAL AREA Oakwood Pre -construction Type 11 24-hr 1-yr, 24-hr Rainfall=2.88" Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 5 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: DA 1 Runoff Area=7.370 ac 0.00% Impervious Runoff Depth>0.24" Flow Length=538' Slope=0.0279 '/' Tc=20.1 min CN=60 Runoff=1.20 cfs 0.149 of Subcatchment 2S: DA 2 Runoff Area=7.200 ac 0.00% Impervious Runoff Depth>0.24" Flow Length=882' Slope=0.0193 T Tc=35.8 min CN=60 Runoff=0.81 cfs 0.143 of Subcatchment 3S: DA 3 Runoff Area=7.140 ac 0.00% Impervious Runoff Depth>0.24" Flow Length=787' Slope=0.0407 '/' Tc=22.5 min CN=60 Runoff=1.07 cfs 0.144 of Subcatchment 4S: DA 4 Runoff Area=8.470 ac 0.00% Impervious Runoff Depth>0.24" Flow Length=886' Slope=0.0305 '/' Tc=28.6 min CN=60 Runoff=1.09 cfs 0.170 of Total Runoff Area = 30.180 ac Runoff Volume = 0.606 of Average Runoff Depth = 0.24" 100.00% Pervious = 30.180 ac 0.00% Impervious = 0.000 ac Oakwood Pre -construction Type 11 24-hr 1-yr, 24-hr Rainfall=2.88" Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 1S: DA 1 Runoff = 1.20 cfs @ 12.21 hrs, Volume= 0.149 af, Depth> 0.24" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr, 24-hr Rainfall=2.88" Area (ac) CN Description 7.370 60 Woods, Fair, HSG B 7.370 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.1 538 0.0279 0.45 Lag/CN Method, DA 1 Subcatchment 1S: DA 1 Hyd rog raph 1.20 cfs Type II 24-hr 1,-yr 1... 24-fir Rainfall=2.88" D Runoff Are: a=7:370:ac j Runoff Volume=0.149 of Runoff Depth>0.24" Flbw Ltength=538' Slope=0 0279 T Tc=20.1 rn: in 13 14 15 16 17 18 19 20 5 6 7 8 9 10 11 12 Time (hours) p Runoff Oakwood Pre -construction Type 11 24-hr 1-yr, 24-hr Rainfall=2.88" Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 2S: DA 2 Runoff = 0.81 cfs @ 12.46 hrs, Volume= 0.143 af, Depth> 0.24" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr, 24-hr Rainfall=2.88" Area (ac) CN Description 7.200 60 Woods, Fair, HSG B 7.200 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 35.8 882 0.0193 0.41 Lag/CN Method, DA 2 N U 3 0 LL Time (hours) p Runoff Oakwood Pre -construction Type 11 24-hr 1-yr, 24-hr Rainfall=2.88" Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 3S: DA 3 Runoff = 1.07 cfs @ 12.24 hrs, Volume= 0.144 af, Depth> 0.24" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr, 24-hr Rainfall=2.88" Area (ac) CN Description 7.140 60 Woods, Fair, HSG B 7.140 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 22.5 787 0.0407 0.58 Lag/CN Method, DA 3 N U 3 0 LL Time (hours) p Runoff Oakwood Pre -construction Type 11 24-hr 1-yr, 24-hr Rainfall=2.88" Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 4S: DA 4 Runoff = 1.09 cfs @ 12.34 hrs, Volume= 0.170 af, Depth> 0.24" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr, 24-hr Rainfall=2.88" Area (ac) CN Description 8.470 60 Woods, Fair, HSG B 8.470 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 28.6 886 0.0305 0.52 Lag/CN Method, DA 4 N U 3 0 LL Time (hours) p Runoff Oakwood Pre -construction Type 11 24-hr 10-yr, 24-hr Rainfall= 6. 00 " Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 10 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: DA 1 Runoff Area=7.370 ac 0.00% Impervious Runoff Depth>1.72" Flow Length=538' Slope=0.0279 '/' Tc=20.1 min CN=60 Runoff=14.77 cfs 1.057 of Subcatchment 2S: DA 2 Runoff Area=7.200 ac 0.00% Impervious Runoff Depth>1.71" Flow Length=882' Slope=0.0193 '/' Tc=35.8 min CN=60 Runoff=9.82 cfs 1.025 of Subcatchment 3S: DA 3 Runoff Area=7.140 ac 0.00% Impervious Runoff Depth>1.72" Flow Length=787' Slope=0.0407 '/' Tc=22.5 min CN=60 Runoff=13.36 cfs 1.023 of Subcatchment 4S: DA 4 Runoff Area=8.470 ac 0.00% Impervious Runoff Depth>1.71" Flow Length=886' Slope=0.0305 '/' Tc=28.6 min CN=60 Runoff=13.51 cfs 1.210 of Total Runoff Area = 30.180 ac Runoff Volume = 4.315 of Average Runoff Depth = 1.72" 100.00% Pervious = 30.180 ac 0.00% Impervious = 0.000 ac Oakwood Pre -construction Type 11 24-hr 10-yr, 24-hr Rainfall= 6. 00 " Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment 1S: DA 1 Runoff = 14.77 cfs @ 12.14 hrs, Volume= 1.057 af, Depth> 1.72" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr, 24-hr Rainfall=6.00" Area (ac) CN Description 7.370 60 Woods, Fair, HSG B 7.370 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.1 538 0.0279 0.45 Lag/CN Method, DA 1 Subcatchment 1S: DA 1 Hydrograph 6.; ` 14.77 cfs Type II 24-hr 4, 10-yr_ 2 Rair�fa�l=.QO" 1 % R�4-hr Uunoff Area=7,370 ac j RunpfF Volumne=1.057 of 91, 8f % Ruoff Depth>1.72" 7 ' Flow Length=538' 6,' '/' Slope-0 0279 s / Tc=20.1 min_ 4 3'� CN=60 2��' 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) p Runoff Oakwood Pre -construction Type 11 24-hr 10-yr, 24-hr Rainfall= 6. 00 " Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment 2S: DA 2 Runoff = 9.82 cfs @ 12.34 hrs, Volume= 1.025 af, Depth> 1.71" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr, 24-hr Rainfall=6.00" Area (ac) CN Description 7.200 60 Woods, Fair, HSG B 7.200 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 35.8 882 0.0193 0.41 Lag/CN Method, DA 2 p Runoff Time (hours) Oakwood Pre -construction Type 11 24-hr 10-yr, 24-hr Rainfall= 6. 00 " Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment 3S: DA 3 Runoff = 13.36 cfs @ 12.17 hrs, Volume= 1.023 af, Depth> 1.72" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr, 24-hr Rainfall=6.00" Area (ac) CN Description 7.140 60 Woods, Fair, HSG B 7.140 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 22.5 787 0.0407 0.58 Lag/CN Method, DA 3 p Runoff Time (hours) Oakwood Pre -construction Type 11 24-hr 10-yr, 24-hr Rainfall= 6. 00 " Prepared by Civil Design Concepts, PA Printed 7/27/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 14 Summary for Subcatchment 4S: DA 4 Runoff = 13.51 cfs @ 12.25 hrs, Volume= 1.210 af, Depth> 1.71" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr, 24-hr Rainfall=6.00" Area (ac) CN Description 8.470 60 Woods, Fair, HSG B 8.470 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 28.6 886 0.0305 0.52 Lag/CN Method, DA 4 p Runoff Time (hours) 1S 2S 3S 4S DA 1 DA 2 DA 3 DA 4 !cat Reach on UnkI Routing Diagram for Oakwood Post -construction Prepared by Civil Design Concepts, PA, Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Oakwood Post -construction Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (su bcatch me nt-n u mbe rs) 0.740 85 Gravel roads, HSG B (1 S, 4S) 29.440 58 Meadow, non -grazed, HSG B (1 S, 2S, 3S, 4S) 30.180 59 TOTAL AREA Oakwood Post -construction Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 30.180 HSG B 1 S, 2S, 3S, 4S 0.000 HSG C 0.000 HSG D 0.000 Other 30.180 TOTAL AREA Oakwood Post -construction Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.740 0.000 0.000 0.000 0.740 Gravel roads 1 S, 4S 0.000 29.440 0.000 0.000 0.000 29.440 Meadow, non -grazed 1 S, 2S, 3S, 4S 0.000 30.180 0.000 0.000 0.000 30.180 TOTAL AREA Oakwood Post -construction Type 11 24-hr 1-yr, 24-hr Rainfall=2.88" Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 5 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1 S: DA 1 Runoff Area=10.640 ac 0.00% Impervious Runoff Depth>0.21" Flow Length=1,029' Slope=0.0204 '/' Tc=40.4 min CN=59 Runoff=0.92 cfs 0.189 of Subcatchment2S: DA 2 Runoff Area=3.930 ac 0.00% Impervious Runoff Depth>0.19" Flow Length=496' Slope=0.0404 '/' Tc=16.4 min CN=58 Runoff=0.47 cfs 0.063 of Subcatchment3S: DA 3 Runoff Area=8.730 ac 0.00% Impervious Runoff Depth>0.19" Flow Length=854' Slope=0.0363 '/' Tc=26.8 min CN=58 Runoff=0.77 cfs 0.140 of Subcatchment4S: DA 4 Runoff Area=6.880 ac 0.00% Impervious Runoff Depth>0.22" Flow Length=779' Slope=0.0334 '/' Tc=25.3 min CN=59 Runoff=0.78 cfs 0.124 of Total Runoff Area = 30.180 ac Runoff Volume = 0.516 of Average Runoff Depth = 0.21" 100.00% Pervious = 30.180 ac 0.00% Impervious = 0.000 ac Oakwood Post -construction Type 11 24-hr 1-yr, 24-hr Rainfall=2.88" Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 1S: DA 1 Runoff = 0.92 cfs @ 12.56 hrs, Volume= 0.189 af, Depth> 0.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr, 24-hr Rainfall=2.88" Area (ac) CN Description 10.060 58 Meadow, non -grazed, HSG B 0.580 85 Gravel roads, HSG B 10.640 59 Weighted Average 10.640 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 40.4 1,029 0.0204 0.42 Lag/CN Method, DA 1 Subcatchment 1S: DA 1 Hydrograph 1 . 0 Runoff 0.92 cfs Type II 24-hr 1-yr j 24-hr Rainfall=2.88 j; Runoff Area=10.640 ac j N Runoff Volume=0.189 of 3 Runoff Depth>0.21 , Flow Length=1,029' Slope=0.0204 '/' Tc = 40.4 min CN=59 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Oakwood Post -construction Type 11 24-hr 1-yr, 24-hr Rainfall=2.88" Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 2S: DA 2 Runoff = 0.47 cfs @ 12.17 hrs, Volume= 0.063 af, Depth> 0.19" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr, 24-hr Rainfall=2.88" Area (ac) CN Description 3.930 58 Meadow, non -grazed, HSG B 3.930 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.4 496 0.0404 0.50 Lag/CN Method, DA 2 Subcatchment 2S: DA 2 Hydrograph 0.52 0.5 0.47 cfs 0.48 0.46 Type II 24-hr 0.44 0.42 � -y r 03s j 24-hr Rainfall=2.88" 0.36 0.34 / Runoff Area=3.930 ac 0.32 o .3 j; Runoff Volume=0.063 of .28 3 0.26 % Runoff Depth>0.19 0 0.24 LL 0.22 Flow Length=496' 0.2 0.18 !; Slope=0.0404 '/' 0.16 0.14 %�� Tc=16.4 min 0.12 //� 0.1 /�� CN 58 0.08 0.04 0.02 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) p� Runoff Oakwood Post -construction Type 11 24-hr 1-yr, 24-hr Rainfall=2.88" Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 3S: DA 3 Runoff = 0.77 cfs @ 12.34 hrs, Volume= 0.140 af, Depth> 0.19" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr, 24-hr Rainfall=2.88" Area (ac) CN Description 8.730 58 Meadow, non -grazed, HSG B 8.730 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 26.8 854 0.0363 0.53 Lag/CN Method, DA 3 Subcatchment 3S: DA 3 Hydrograph p� Runoff 0.77 cfs Type 11 24-h r 1-yr 24-hr Rainfall=2.88" jRunoff Area=8.730 ac Runoff Volume=0.140 of Runoff Depth>0.19" Flow Length=854` Slope=0.0363 'L'_ Tc=26.8 min - =//58- s 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Oakwood Post -construction Type 11 24-hr 1-yr, 24-hr Rainfall=2.88" Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 4S: DA 4 Runoff = 0.78 cfs @ 12.30 hrs, Volume= 0.124 af, Depth> 0.22" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr, 24-hr Rainfall=2.88" Area (ac) CN Description 6.720 58 Meadow, non -grazed, HSG B 0.160 85 Gravel roads, HSG B 6.880 59 Weighted Average 6.880 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 25.3 779 0.0334 0.51 Lag/CN Method, DA 4 Subcatchment 4S: DA 4 Hydrograph 0.85 0.78 cfs 0.8 Type 11 24-hr 0.75 j 0.7 ' j 1-y r 0.65 j, 24-hr Rainfall=2.88" 0.6 00.6 Runoff Area=6.880 ac N 0.5 j Runoff Volume=0.124 of 3 0.45 j Runoff Depth>0.22" 0 0.4 LL / Flow Length=779' 0s5 ,, 0.3 Slope=0.0334 '/' 0.25 Tc=25.3 m i n 0.2 0.15 CN=59 0.1 0.05 11 5 6 7 8 9 10 11 12 6 14 15 16 17 18 19 20 Time (hours) p Runoff Oakwood Post -construction Type 11 24-hr 10-yr, 24-hr Rainfall=6.00" Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 10 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1 S: DA 1 Runoff Area=10.640 ac 0.00% Impervious Runoff Depth>1.63" Flow Length=1,029' Slope=0.0204 '/' Tc=40.4 min CN=59 Runoff=12.58 cfs 1.442 of Subcatchment2S: DA 2 Runoff Area=3.930 ac 0.00% Impervious Runoff Depth>1.57" Flow Length=496' Slope=0.0404 '/' Tc=16.4 min CN=58 Runoff=7.98 cfs 0.514 of Subcatchment3S: DA 3 Runoff Area=8.730 ac 0.00% Impervious Runoff Depth>1.56" Flow Length=854' Slope=0.0363 '/' Tc=26.8 min CN=58 Runoff=12.99 cfs 1.136 of Subcatchment4S: DA 4 Runoff Area=6.880 ac 0.00% Impervious Runoff Depth>1.64" Flow Length=779' Slope=0.0334 '/' Tc=25.3 min CN=59 Runoff=11.29 cfs 0.940 of Total Runoff Area = 30.180 ac Runoff Volume = 4.031 of Average Runoff Depth = 1.60" 100.00% Pervious = 30.180 ac 0.00% Impervious = 0.000 ac Oakwood Post -construction Type 11 24-hr 10-yr, 24-hr Rainfall=6.00" Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment 1S: DA 1 Runoff = 12.58 cfs @ 12.41 hrs, Volume= 1.442 af, Depth> 1.63" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr, 24-hr Rainfall=6.00" Area (ac) CN Description 10.060 58 Meadow, non -grazed, HSG B 0.580 85 Gravel roads, HSG B 10.640 59 Weighted Average 10.640 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 40.4 1,029 0.0204 0.42 Lag/CN Method, DA 1 Subcatchment 1S: DA 1 Hydrograph 14 0 Runoff 13 12.58 cfs Type 11 24-hr 12 10-yr - % 24-hr Rainfall=6.00" 10 9 Runoff Area=10.640 ac H 8 Runoff Volume=1.442 of 3 7 / j Runoff Depth>1.63" LL 6 Flow Length=1,029' 5 '/' j Slope=0.0204 4 Tc=40.4 min 3 r CN=59 2 0' 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Oakwood Post -construction Type 11 24-hr 10-yr, 24-hr Rainfall=6.00" Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment 2S: DA 2 Runoff = 7.98 cfs @ 12.10 hrs, Volume= 0.514 af, Depth> 1.57" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr, 24-hr Rainfall=6.00" Area (ac) CN Description 3.930 58 Meadow, non -grazed, HSG B 3.930 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.4 496 0.0404 0.50 Lag/CN Method, DA 2 N 0 LL Subcatchment 2S: DA 2 Hydrograph 7.98 CfS I o Runoff ®® 12■ 5 6 7 8 9 10 11 Type II 24-hr 10-yr 24-hr_ Rainfal I=_6.00"_ Runoff Area=3.930 ac Runoff Volume=0514 of - Runoff Depth>1.57" Flow Length=496' Slope=0.0404 '/' - Tc=16.4 min- CN=58 12 13 14 15 16 17 18 19 20 Time (hours) Oakwood Post -construction Type 11 24-hr 10-yr, 24-hr Rainfall=6.00" Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment 3S: DA 3 Runoff = 12.99 cfs @ 12.23 hrs, Volume= 1.136 af, Depth> 1.56" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr, 24-hr Rainfall=6.00" Area (ac) CN Description 8.730 58 Meadow, non -grazed, HSG B 8.730 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 26.8 854 0.0363 0.53 Lag/CN Method, DA 3 Subcatchment 3S: DA 3 Hydrograph 14 , 12.99 cfS o Runoff 13 j Type 11.24-hr 12 / 10-yr 11 j 24-hr Rainfall=6.00" - 10 9 % Runoff Area=8.730 ac $ Runoff Volume=1.136 of 3 7 % Runoff Depth>1.56" LL 6 j Flow Length=854' 5 j Slope=0.0363 '/' 4 Tc=26.8 min 3 CN=58 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Oakwood Post -construction Type 11 24-hr 10-yr, 24-hr Rainfall=6.00" Prepared by Civil Design Concepts, PA Printed 8/5/2020 HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC Page 14 Summary for Subcatchment 4S: DA 4 Runoff = 11.29 cfs @ 12.21 hrs, Volume= 0.940 af, Depth> 1.64" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr, 24-hr Rainfall=6.00" Area (ac) CN Description 6.720 58 Meadow, non -grazed, HSG B 0.160 85 Gravel roads, HSG B 6.880 59 Weighted Average 6.880 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 25.3 779 0.0334 0.51 Lag/CN Method, DA 4 Subcatchment 4S: DA 4 Hydrograph 0 Runoff 12 11.29 cfs 11 j Type 11 24-hr 10 '%/ 10-yr 24-hr Rainfall=6.00" Runoff Area=6.880 ac Runoff Volume=0.940 of 3 Runoff Depth>1.64" 6 LL % Flow Length=779, 5 Slope=0.0334 I 4�j Tc=25.3 min 3 CN=59 2 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) COD C CWH L?esign Concepts, RA Oakwood Solar CDC Proj ect No.: 12056 TEMPORARY SEDIMENT BASIN SCHEDULE BASIN INFORMATION Trap/Basin ID A B C Units Basin Type Skimmer Skimmer Skimmer Maximum Drainage Area 10 10 10 acre Drainage Area (DA) 8.36 3.41 7.03 acre Disturbed Area 8.36 3.41 7.03 acre Runoff Coefficient (C) 0.6 0.6 0.6 Rainfall Intensity (h0) 7.15 7.15 7.15 in/hr Top of Water Length 165 100 165 feet Top of Water Width 78 50 60 feet L/W Ratio 2.1:1 2.0:1 2.8:1 feet Water Depth 2.00 2.00 2.00 feet Side Slope Ratio 2.00 2.00 2.00 X:1 Bottom of Basin Length 157 92 157 feet Bottom of Basin Width 1 70 42 52 feet SURFACE AREA & VOLUME Runoff (10 Year Event) 35.86 14.63 30.16 cfs Minimum Volume 15,048 6,138 12,654 cu-ft Volume Provided 23,860 8,864 18,064 cu-ft Minimum Surface Area 11,656 4,754 9,802 sq-ft Surface Area Provided 12,870 5,000 9,900 sq-ft SKIMMER SIZE Drawdown Time 3 3 3 days Skimmer Size 3.0 2.0 2.5 inch Orifice Diameter 2.7 1.8 2.5 inch Does the basin have a spillway? Yes SPILLWAY SIZE Spillway Dimensions feet Water Depth feet Free -Board feet Notes: NCDENR E&SC Manual (Ch 6.6) Weighted Coefficient at TC 2:1 Min, 6:1 Max Train for Skimmer & Basin = Lt - 2 (Slope x Depth) = Wt - 2 (Slope x Depth) =DAxCxI In NC assume 3 days Faircloth Skimmer Chart Faircloth Orifice Factors Basins always have a spillway. 1. Spillway dimensions are calculatued using weir calculations. 2. Rainfall Intensity, I, is obtained from Appendix 8.03.07 from the NC Erosion & Sediment Control Planning & Design Manual 3. Skimmer Design is based off of the Faircloth Skimmer Packet 4. Drawdown time is per NCDENR requirements Issued 8/5/2020 COD C CWH L?esign Concepts, RA Oakwood Solar CDC Proj ect No.: 12056 TEMPORARY SEDIMENT BASIN SCHEDULE BASIN INFORMATION Trap/Basin ID D Units Basin Type Skimmer Maximum Drainage Area 10 acre Drainage Area (DA) 5.84 acre Disturbed Area 5.84 acre Runoff Coefficient (C) 0.6 Rainfall Intensity (h0) 7.15 in/hr Top of Water Length 151 feet Top of Water Width 55 feet L/W Ratio 2.7:1 feet Water Depth 2.00 feet Side Slope Ratio 2.00 X:1 Bottom of Basin Length 143 feet Bottom of Basin Width 47 feet SURFACE AREA & VOLUME Runoff (10 Year Event) 25.05 cfs Minimum Volume 10,512 cu-ft Volume Provided 15,026 cu-ft Minimum Surface Area 8,142 sq-ft Surface Area Provided 8,305 sq-ft SKIMMER SIZE Drawdown Time 3 days Skimmer Size 2.5 N/A N/A inch Orifice Diameter 2.2 N/A N/A inch Does the basin have a spillway? Yes SPILLWAY SIZE Spillway Dimensions feet Water Depth feet Free -Board feet Notes: NCDENR E&SC Manual (Ch 6.6) Weighted Coefficient at TC 2:1 Min, 6:1 Max Train for Skimmer & Basin = Lt - 2 (Slope x Depth) = Wt - 2 (Slope x Depth) =DAxCxI In NC assume 3 days Faircloth Skimmer Chart Faircloth Orifice Factors Basins always have a spillway. 1. Spillway dimensions are calculatued using weir calculations. 2. Rainfall Intensity, I, is obtained from Appendix 8.03.07 from the NC Erosion & Sediment Control Planning & Design Manual 3. Skimmer Design is based off of the Faircloth Skimmer Packet 4. Drawdown time is per NCDENR requirements Issued 8/5/2020 .Q Ln Q C N (0 m Lv E E to C O (0 3 cr LU i i 75 3 c� G cd G Cf] N E L O Ln z w 0 U z Ln M C O U N Ln n r-I G 2 J U wi N V 0) (0 u U N I J -i Lv (0 .L.J N Lv N N N _cu O N cu E Lv Lw (0 U O c cu U Li- N O U U FO O 4J E cts L L.J N CL 3 Ln 3 O c Lv L c O CL m 4L m cu U L 3 N L cu 4L cu 15 O 4L L cu cu 4— O 'n Lv U N LJ � cu y u U GO CU Lw 0 U O .— y (13 L cu cu > L 3 N N L (0 3 Lv V1 E (mu — E L l� cu 4— cu O -C dA t C dA � C c L J (� Z rn 0 0 cn cn cn L L — > N N 0 on on Lv Lv Lv Lv L L L U U LL CL L � O L Ln CO 00 r4 N Lfl 06 M II II II C 2 II C7 J O 2 a4L- CLU > °� _N LU >cu 2� 4� c cu cu .Q Ln co C N (0 m Lv E E to C O (0 3 cr LU i i 75 3 c� G cd G Cf] E L O Ln z w 0 U z Ln M C O U N Ln n r-I G 2 J U wi N V 0) (0 u U N I J -i Lv (0 .L.J N Lv N N N _cu O N cu E Lv Lw (0 U O c cu U N O U U FO O 4J E cts L L.J N CL 3 Ln 3 O c Lv L c O CL m 4L m cu U L 3 N L cu 4L cu 15 O 4L L cu cu 4— O 'n Lv U N LJ � cu y u U GO CU Lw 0 U O .— y (13 L cu cu > L 3 N N L (0 3 Lv V1 C G (mu — E L l� cu 4— cu O -C dA � C dA > C c L J (� Z rn 0 0 cn cn cn L L — > N N 0 on on Lv Lv Lv Lv L L L U U LL CL L � O L Ln CO 00 r4 -i N M r -I M uVm II II II C 2 II C7 J O 2 a4L- CLU > °� _N LU >cu 2� 4� c cu cu CL Ln U c N (0 m cu E E (n i O (0 3 cr LU i i 75 3 c� G cd G Cf] (0 E L O Ln z w 0 U z Ln M C O U N Ln n r-I G 2 J U wi N V 0) (0 u U N I J -i cu (0 N cu N N N _cu O N cu cu tw (0 U O c cu U 4- N O U U FO O 4J E c� L Y N CL 3 on 3 O c cu L c O CL m Y m cu U L 3 N L cu Y cu 15 Y O Y L cu cu 4— O V1 cu U N cu y u U GO CU Y t 0 U O .— y (B L cu cu > L 3 N N L (0 3 U on G (B - G L l� cu 4— cu O -C dA � C dA � c L J (� Z M 0 0 M M M L L — > N N 0 V1 V1 N cu cu cu L L L U U LL CL L � O L Ln CO 00 r4 I N CL 4 Y U _O cu II II II C 2 II C7 J O 2 Y 4L CL > °U _N LU >cu 2� 4� c cu cu .Q Ln 0 N (0 m Lv E E to i O (0 3 cr LU i i 75 3 cd G Cf] (0 E L O Ln z w 0 U z Ln M C O U N Ln n r-I G 2 J U wJ N V 0) (0 u U N I J -i Lv (0 N Lv N N N _cu O N cu Lv Lw (0 U O c cu U 4— N O U U FO O 4J E cts L Y N CL 3 Ln 3 O c Lv L c O CL m Y m cu U L 3 N L cu Y cu 15 Y O Y L cu cu 4— O 'n Lv U N cu y u U GO CU Y Lw 0 U O .— y (13 L cu cu > L 3 N N L (0 3 Lv V1 C G (mu - G L l� cu 4— cu O -C dA � C dA > c L J (� Z rn 0 0 cn cn cn L L — > N N 0 on on Lv Lv Lv Lv L L L U U LL CL L � O L Ln CO 00 r4 00 L.O cn N II II II C 2 II C7 J O 2 Y 4L CL > °U _N LU >cu 2� 4� c cu cu Hydrology Report Hydraflow Express Extension for AUtodeskS Civil 31DO by Autodesk, Inc. Temp Ditch Al Hydrograph type = Rational Storm frequency (yrs) = 10 Drainage area (ac) = 4.800 Rainfall Inten (in/hr) = 7.144 OF Curve = Oakwood.IDF Q (cfs) 21.00 18.00 15.00 12.00 3.00 0.00 If 0 Runoff Hyd - Qp = 20.57 (cfs) Wednesday, Jun 102020 Peak discharge (cfs) = 20.57 Time interval (min) = 1 Runoff coeff. (C) = 0.6 Tc by User (min) = 5 Rec limb factor = 1.00 Runoff Hydrograph 10-yr frequency 5 Hydrograph Volume = 6,172 (cuft); 0.142 (acft) Q (cfs) 21.00 18.00 15.00 12.00 • us 3.00 0.00 10 Time (min) 6/12/2020 NORT I GREEN' CHANNEL ANALYSIS > > > Temporary Ditch Al Name Temporary Ditch Al Discharge 20.57 Channel Slope 0.04 Channel Bottom Width 1 Left Side Slope 2 Right Side Slope 2 Low Flow Liner Retardence Class C 6-12 in Vegetation Type None Vegetation Density None Soil Type None C125BN North American Green 5401 St. Wendel -Cynthiana Rd. Poseyville, Indiana 47633 Tel. 800.772.2040 > Fax 812.867.0247 www.nagreen.com ECMDS v7.0 Normal Permissible Calculated Safety Staple Phase Reach Discharge Velocity Mannings N Remarks Depth Shear Stress Shear Stress Factor Pattern C125BN Straight 20.57 cfs 7.48 ft/s 0.95 ft 0.026 2.8 Ibs/ft2 2.37 Ibs/ft2 1.18 STABLE D Unvegetated Underlying Straight 20.57 cfs 7.48 ft/s 0.95 ft 0.026 0.65 Ibs/ft2 1.31 Ibs/ft2 0.5 UNSTABLE D Substrate https://ecmds.com/project/l 44473/channel-analysis/184934/show 1 /1 Hydrology Report Hydraflow Express Extension for AUtodeskS Civil 3DO by Autodesk, Inc. Wednesday, Jun 10 2020 Temp Ditch A2 Hydrograph type = Rational Peak discharge (cfs) = 8.315 Storm frequency (yrs) = 10 Time interval (min) = 1 Drainage area (ac) = 1.940 Runoff coeff. (C) = 0.6 Rainfall Inten (in/hr) = 7.144 Tc by User (min) = 5 OF Curve = Oakwood.IDF Rec limb factor = 1.00 Q (cfs) 10.00 4.00 2.00 Runoff Hyd - Qp = 8.32 (cfs) Runoff Hydrograph 10-yr frequency 5 Hydrograph Volume = 2,495 (cuft); 0.057 (acft) Q (cfs) 10.00 4.00 2.00 0.00 10 Time (min) 6/12/2020 NORT I GREEN' CHANNEL ANALYSIS > > > Temporary Ditch A2 Name Temporary Ditch A2 Discharge 8.315 Channel Slope 0.015 Channel Bottom Width 1 Left Side Slope 2 Right Side Slope 2 Low Flow Liner Retardence Class C 6-12 in Vegetation Type None Vegetation Density None Soil Type None DS75 North American Green 5401 St. Wendel -Cynthiana Rd. Poseyville, Indiana 47633 Tel. 800.772.2040 > Fax 812.867.0247 www.nagreen.com ECMDS v7.0 Normal Permissible Calculated Safety Staple Phase Reach Discharge Velocity Mannings N Remarks Depth Shear Stress Shear Stress Factor Pattern DS75 Straight 8.32 cfs 3.42 ft/s 0.88 ft 0.033 1.6 Ibs/ft2 0.82 Ibs/ft2 1.94 STABLE D Unvegetated Underlying Straight 8.32 cfs 3.42 ft/s 0.88 ft 0.033 0.37 Ibs/ft2 0.46 Ibs/ft2 0.81 UNSTABLE D Substrate https://ecmds.com/project/l 44473/channel-analysis/184936/show 1 /1 Hydrology Report Hydraflow Express Extension for AUtodeskS Civil 3DO by Autodesk, Inc. Thursday, Jun 11 2020 Temp Ditch B Hydrograph type = Rational Peak discharge (cfs) = 9.387 Storm frequency (yrs) = 10 Time interval (min) = 1 Drainage area (ac) = 2.190 Runoff coeff. (C) = 0.6 Rainfall Inten (in/hr) = 7.144 Tc by User (min) = 5 OF Curve = Oakwood.IDF Rec limb factor = 1.00 Q (cfs) 10.00 4.00 2.00 Runoff Hyd - Qp = 9.39 (cfs) Runoff Hydrograph 10-yr frequency 5 Hydrograph Volume = 2,816 (cuft); 0.065 (acft) Q (cfs) 10.00 4.00 2.00 0.00 10 Time (min) 6/12/2020 NORT I GREEN' CHANNEL ANALYSIS > > > Temporary Ditch B Name Temporary Ditch B Discharge 9.387 Channel Slope 0.015 Channel Bottom Width 1 Left Side Slope 2 Right Side Slope 2 Low Flow Liner Retardence Class C 6-12 in Vegetation Type None Vegetation Density None Soil Type None DS75 North American Green 5401 St. Wendel -Cynthiana Rd. Poseyville, Indiana 47633 Tel. 800.772.2040 > Fax 812.867.0247 www.nagreen.com ECMDS v7.0 Normal Permissible Calculated Safety Staple Phase Reach Discharge Velocity Mannings N Remarks Depth Shear Stress Shear Stress Factor Pattern DS75 Straight 9.39 cfs 3.54 ft/s 0.93 ft 0.033 1.6 Ibs/ft2 0.87 Ibs/ft2 1.84 STABLE D Unvegetated Underlying Straight 9.39 cfs 3.54 ft/s 0.93 ft 0.033 0.37 Ibs/ft2 0.48 Ibs/ft2 0.77 UNSTABLE D Substrate https://ecmds.com/project/l 44473/channel-analysis/184937/show 1 /1 Hydrology Report Hydraflow Express Extension for AUtodeskS Civil 31DO by Autodesk, Inc. Temp Ditch C Hydrograph type = Rational Storm frequency (yrs) = 10 Drainage area (ac) = 4.540 Rainfall Inten (in/hr) = 7.144 OF Curve = Oakwood.IDF Q (cfs) 21.00 18.00 15.00 12.00 3.00 0.00 W 0 Runoff Hyd - Qp = 19.46 (cfs) Thursday, Jun 11 2020 Peak discharge (cfs) = 19.46 Time interval (min) = 1 Runoff coeff. (C) = 0.6 Tc by User (min) = 5 Rec limb factor = 1.00 Runoff Hydrograph 10-yr frequency 5 Hydrograph Volume = 5,838 (cuft); 0.134 (acft) Q (cfs) 21.00 18.00 15.00 12.00 • us 3.00 0.00 10 Time (min) 6/12/2020 NORT I GREEN' CHANNEL ANALYSIS > > > Temporary Ditch C Name Temporary Ditch C Discharge 19.45 Channel Slope 0.01 Channel Bottom Width 1 Left Side Slope 2 Right Side Slope 2 Low Flow Liner Retardence Class C 6-12 in Vegetation Type None Vegetation Density None Soil Type None DS75 North American Green 5401 St. Wendel -Cynthiana Rd. Poseyville, Indiana 47633 Tel. 800.772.2040 > Fax 812.867.0247 www.nagreen.com ECMDS v7.0 Normal Permissible Calculated Safety Staple Phase Reach Discharge Velocity Mannings N Remarks Depth Shear Stress Shear Stress Factor Pattern DS75 Straight 19.45 cfs 3.64 ft/s 1.4 ft 0.033 1.6 Ibs/ft2 0.88 Ibs/ft2 1.83 STABLE D Unvegetated Underlying Straight 19.45 cfs 3.64 ft/s 1.4 ft 0.033 0.37 Ibs/ft2 0.46 Ibs/ft2 0.81 UNSTABLE D Substrate https://ecmds.com/project/l 44473/channel-analysis/184938/show 1 /1 Hydrology Report Hydraflow Express Extension for AUtodeskS Civil 3DO by Autodesk, Inc. Wednesday, Jun 10 2020 Temp Ditch D Hydrograph type = Rational Peak discharge (cfs) = 11.40 Storm frequency (yrs) = 10 Time interval (min) = 1 Drainage area (ac) = 2.660 Runoff coeff. (C) = 0.6 Rainfall Inten (in/hr) = 7.144 Tc by User (min) = 5 OF Curve = Oakwood.IDF Rec limb factor = 1.00 Q (cfs) 12.00 10.00 : M .M 4.00 2.00 e Runoff Hyd - Qp = 11.40 (cfs) Runoff Hydrograph 10-yr frequency 5 Hydrograph Volume = 3,420 (cuft); 0.079 (acft) Q (cfs) 12.00 10.00 M M 4.00 2.00 0.00 10 Time (min) 6/12/2020 NORT I GREEN' CHANNEL ANALYSIS > > > Temporary Ditch D Name Temporary Ditch D Discharge 11.4 Channel Slope 0.025 Channel Bottom Width 1 Left Side Slope 2 Right Side Slope 2 Low Flow Liner Retardence Class C 6-12 in Vegetation Type None Vegetation Density None Soil Type None SC150 North American Green 5401 St. Wendel -Cynthiana Rd. Poseyville, Indiana 47633 Tel. 800.772.2040 > Fax 812.867.0247 www.nagreen.com ECMDS v7.0 Normal Permissible Calculated Safety Staple Phase Reach Discharge Velocity Mannings N Remarks Depth Shear Stress Shear Stress Factor Pattern SC150 Straight 11.4 cfs 4.13 ft/s 0.95 ft 0.037 2 Ibs/ft2 1.48 Ibs/ft2 1.35 STABLE D Unvegetated Underlying Straight 11.4 cfs 4.13 ft/s 0.95 ft 0.037 0.47 Ibs/ft2 0.82 Ibs/ft2 0.57 UNSTABLE D Substrate https://ecmds.com/project/l 44473/channel-analysis/184939/show 1 /1 Appendices 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). STRUCTURE: RIP RAP A LENGTH: loft DISCHARGE: ALL SKIMMER BASIN LESS THAN 3 ds WIDTH: 10.25 ft PIPE DIA. (D) 3 in d50: 0.50 ft DEPTH: 1.5 ft Rev. 12/93 8.06.3 USDA United States = Department of Agriculture Natural Resources Conservation Service A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Orange County, North Carolina Oakwood Solar Farm, LLC May 18, 2020 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nres.usda.gov/wps/ portal/nres/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https:Hoffices.sc.egov.usda.gov/locator/app?agency=nres) or your NRCS State Soil Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/? cid=nres142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. Contents Preface.................................................................................................................... 2 How Soil Surveys Are Made..................................................................................5 SoilMap.................................................................................................................. 8 SoilMap................................................................................................................9 Legend................................................................................................................10 MapUnit Legend................................................................................................ 11 MapUnit Descriptions.........................................................................................11 Orange County, North Carolina.......................................................................13 EnC—Enon loam, 6 to 12 percent slopes ................................................... 13 GeB—Georgeville silt loam, 2 to 6 percent slopes......................................14 GeC—Georgeville silt loam, 6 to 10 percent slopes....................................15 TaD—Tarrus silt loam, 8 to 15 percent slopes.............................................17 W—Water....................................................................................................18 References............................................................................................................19 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil -vegetation -landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil Custom Soil Resource Report scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil -landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil -landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field -observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and Custom Soil Resource Report identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. Custom Soil Resource Report Soil Map 658880 658970 659060 659150 659240 659240 a 659330 36° 540"N I I II a) '0 a) oU) _ U N U) U) m p a) U i y a) � u a) Oa) O ` m CO V 2 2 N U O U a)30 p a) U O O E O a) 6 U) 6 .92 + U) O_ o E O U ' w N m CL m V — U N Z m a) N O iZ-N '� a) `' N a m U .O E N U N-0 O y O Q m O O Q 3 O m a) U Of m °) O O a) a) N O E m y L U) a) CJ a) O > Z U O p t E u) O Q O = L m O d a) '6 y m Q " N O a) L 0 m O _C 3: y U E U W �p m 0 a) N mCL O- Z O- m N N O O p Q O m a) E U) L m U) U (6 C (6 .0 mm-� O O 2� U a) m Oa- a) O_ m O >+ m > U p O a) O O U >+ O '� U O 30 O) U) 2 O E �' m N Z N O L O U '� N m O U O_ N m E N — E c a) N a) 7 y U O N U O_� ,� -O O a) p O) -a Q N C Q� U m U y O O O N y N> N Q U m U CL 3 J N Q O O — a) a) 0 0 C G m E Q m m s a) m� Z � E -0 L 0� a) �- O a) n °) ns m a) a) o N 0� 'E U) m E C H y >+ 2 ai m t N N jp a�i O) (6 m 6 m a) E 0 0) N� >' O -0 O y O- N >+ a) U m m 7 -U) '6 N Q (n ._ T O 76 m O_ O U C m N w a) N E rn O a) m 3 U U °? .J 3 C m m U .O Q m '0 O L O N E Q m U) .30 OC E E 0m= m O C E m� U O pO a ' 'O m 0 a) my O '6am) U) O a) u) U U C 2E Q U a) E O ) O 'Q N O U O O n Q-0 Ln 46 0O LP O LOC W—U U) a E u) Q m o U U Q y d y R O Li U R L L Q Q >. 00 0 0 L d Q 0 J N CL a) .0. O y o O m a 0 CL O U U> Z ° aR N L_ y O U U � O ° a) R m U J a Q R C W " ! V F m W J y a Q pCL y o o ) w o a o a N y Q E R Q a a U C > C C a) > > Q Q a w 3 R 3 y O > a > ° w o O` o w Q _ o o a R R R R w LL 3 3 O T a w > > = `o a R w o E coi O a) o `o Y o U) a y Q 0 cn 0 0 S o cn cn p m o R m U o U (7 (7 m 'm R E J J n a) a O m m U) R a) U) U) a in U) O U) w a U N M �' i�"'o a 'ory%MVrd hilj�IN '4k1� m I�V Ill.ir ,wdl�V pO R N I 13 Q y Q V) 0 r Custom Soil Resource Report Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI EnC Enon loam, 6 to 12 percent slopes 2.2 4.4% GeB Georgeville silt loam, 2 to 6 percent slopes 24.3 49.3% GeC Georgeville silt loam, 6 to 10 percent slopes 16.2 32.8% TaD Tarrus silt loam, 8 to 15 percent slopes 5.7 11.5% W Water 1.0 1.9% Totals for Area of Interest 49.3 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. 11 Custom Soil Resource Report The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha -Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 12 Custom Soil Resource Report Orange County, North Carolina EnC—Enon loam, 6 to 12 percent slopes Map Unit Setting National map unit symbol: 3tgm Elevation: 200 to 1,400 feet Mean annual precipitation: 37 to 60 inches Mean annual air temperature: 59 to 66 degrees F Frost -free period: 200 to 240 days Farmland classification: Farmland of statewide importance Map Unit Composition Enon and similar soils: 85 percent Minor components: 8 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Enon Setting Landform: Hillslopes on ridges Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down -slope shape: Linear Across -slope shape: Convex Parent material: Saprolite derived from diorite and/or gabbro and/or diabase and/or gneiss Typical profile A - 0 to 3 inches: fine sandy loam E - 3 to 8 inches: fine sandy loam BE - 8 to 11 inches: sandy clay loam Bt - 11 to 33 inches: clay C - 33 to 80 inches: loam Properties and qualities Slope: 6 to 10 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat): Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 8.3 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3e Hydrologic Soil Group: C Hydric soil rating: No 13 Custom Soil Resource Report Minor Components Wynott Percent of map unit: 4 percent Landform: Hillslopes on ridges Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down -slope shape: Linear Across -slope shape: Convex Hydric soil rating: No Wedowee Percent of map unit: 3 percent Landform: Hillslopes on ridges Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down -slope shape: Linear Across -slope shape: Convex Hydric soil rating: No Cecil Percent of map unit: 1 percent Landform: Interfluves Landform position (two-dimensional): Summit, shoulder Landform position (three-dimensional): Interfluve Down -slope shape: Convex Across -slope shape: Convex Hydric soil rating: No GeB—Georgeville silt loam, 2 to 6 percent slopes Map Unit Setting National map unit symbol: 2vy6v Elevation: 160 to 820 feet Mean annual precipitation: 43 to 47 inches Mean annual air temperature: 57 to 61 degrees F Frost -free period: 200 to 230 days Farmland classification: All areas are prime farmland Map Unit Composition Georgeville and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Georgeville Setting Landform: Interfluves Landform position (two-dimensional): Summit, shoulder Landform position (three-dimensional): Interfluve 14 Custom Soil Resource Report Down -slope shape: Convex Across -slope shape: Convex Parent material: Residuum weathered from metavolcanics and/or residuum weathered from argillite and/or residuum weathered from phyllite and/or residuum weathered from sericite schist Typical profile Ap - 0 to 9 inches: silt loam E - 9 to 14 inches: silt loam Bt1 - 14 to 20 inches: silty clay loam Bt2 - 20 to 27 inches: clay Bt3 - 27 to 49 inches: silty clay BCt - 49 to 57 inches: silty clay loam C - 57 to 62 inches: silt loam Properties and qualities Slope: 2 to 6 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 9.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2e Hydrologic Soil Group: B Hydric soil rating: No Minor Components Tarrus Percent of map unit. 10 percent Landform: Interfluves Landform position (two-dimensional): Summit, shoulder Landform position (three-dimensional): Interfluve Down -slope shape: Convex Across -slope shape: Convex Hydric soil rating: No GeC—Georgeville silt loam, 6 to 10 percent slopes Map Unit Setting National map unit symbol. 2vy6n Elevation: 160 to 820 feet Mean annual precipitation: 43 to 47 inches Mean annual air temperature: 57 to 61 degrees F Frost -free period: 200 to 230 days 15 Custom Soil Resource Report Farmland classification: Farmland of statewide importance Map Unit Composition Georgeville and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Georgeville Setting Landform: Hillslopes Landform position (two-dimensional): Backslope, shoulder Landform position (three-dimensional): Side slope Down -slope shape: Convex Across -slope shape: Convex Parent material: Residuum weathered from metavolcanics and/or residuum weathered from argillite and/or residuum weathered from phyllite and/or residuum weathered from sericite schist Typical profile Ap - 0 to 7 inches: silt loam BE - 7 to 10 inches: silty clay loam Bt - 10 to 44 inches: clay BC - 44 to 53 inches: silty clay loam C - 53 to 80 inches: loam Properties and qualities Slope: 6 to 10 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat) high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 9.2 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3e Hydrologic Soil Group: B Hydric soil rating: No Minor Components Tarrus Percent of map unit. 10 percent Landform: Interfluves Landform position (two-dimensional): Landform position (three-dimensional) Down -slope shape: Convex Across -slope shape: Convex Hydric soil rating: No Shoulder, backslope : Interfluve Moderately high to it. Custom Soil Resource Report TAD—Tarrus silt loam, 8 to 15 percent slopes Map Unit Setting National map unit symbol: 2n868 Elevation: 200 to 650 feet Mean annual precipitation: 37 to 60 inches Mean annual air temperature: 59 to 66 degrees F Frost -free period: 200 to 240 days Farmland classification: Farmland of statewide importance Map Unit Composition Tarrus and similar soils: 75 percent Minor components: 20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Tarrus Setting Landform: Hillslopes on ridges Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down -slope shape: Linear Across -slope shape: Convex Parent material: Residuum weathered from metavolcanics and/or argillite Typical profile Ap - 0 to 8 inches: silt loam Bt - 8 to 50 inches: clay loam Cr - 50 to 80 inches: weathered bedrock Properties and qualities Slope: 8 to 15 percent Depth to restrictive feature: 40 to 60 inches to paralithic bedrock Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat): Very low to high (0.00 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 7.7 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3e Hydrologic Soil Group: B Hydric soil rating: No 17 Custom Soil Resource Report Minor Components Badin Percent of map unit: 15 percent Landform: Hillslopes on ridges Landform position (two-dimensional): Shoulder, backslope Landform position (three-dimensional): Side slope Down -slope shape: Linear Across -slope shape: Convex Hydric soil rating: No Goldston Percent of map unit: 5 percent Landform: Hillslopes on ridges Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down -slope shape: Linear Across -slope shape: Convex Hydric soil rating: No W—Water Map Unit Composition Water.- 100 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Water Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 8w Hydric soil rating: No 18 References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal/ n res/d eta i I/n ati o n a I/s o i Is/?cid = n res 142 p2_0 54262 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www. nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www. nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/ home/?cid=nres142p2_053374 United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/ detail/national/landuse/rangepastu re/?cid=stelprdb1043084 19 Custom Soil Resource Report United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http://www.nres.usda.gov/wps/portal/ n res/d eta i I/so i Is/scie ntists/?cid=n res 142 p2_054242 United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/? cid = n res 142 p2_05 3624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:H www.nrcs.usda.gov/lnternet/FSE—DOCUMENTS/nrcsl 42p2_052290. pdf 20 E USGS U.S. D U'.T, GEOLOGIICAL SURVEY RIOR w NORTEFLAND QUADRANGLEAROOSE UN q;N USTopo 7 5 MINUTE ERIE SCALE 24NW °n�,_ _ m n ® om.e vJwMNe4 n.�ao.oaa ooioi�i�sa000was EFLAND9 NC: Oz Z(0 M N �1 N ((2 IIV 'K Q N IIV j IIV N (6 U Q COL(6 E (6 w N (6 y y C Y J C (6 2 (6 LL CL O = O O i_ i O (6 -0 0 6 a _ a °o N 3 = m (6 0 0 c u° 3(0 E 17 a c m N 6 w o N E c 0 0 'yti y0 0= _ d _ c O d E Oi Q 'O 0 LL w N N Q uV O O m '6 o LL "` 2 'O O LL '6 N (6 3 (/) C J cl = i N N (6 Q (6 (6(CO U N y N Y L 'r = U T LL w -0 N . _ N U N= U O (6 (6 O= s cl (6 C K N O LL = E y0 O O i > O (6 N (6 m (6 (6 Q E N .O (6 w N Q U (6 = E N w 3 N O i E O (6 2 = 4,5 '6 (6 E - J N LL O (6 = W N N 9 U N- > (0 Q N .T+ .�.+ 3 0 C U Q .O '6 ®^ = E O d N E _ O U> 3 3 N p N Z O = O m d LL = O N C 3 U Y =O = W .o m (6 C 3 = = U (6 C (6 :+6 '0 = i OQ O Q '0 w = C LL 0 .- -' N >> A � (6 j (6 U E� y U� U O .�.+ fn .�.+ ; U N N H O (/) U o H m (6 y6 Q N N (�6 .�.+ N Q OFF' 3 E 0 c7 O Q (6 w N o = LL c76 � °� o u E w° 3 Q O> '..R c '6 _ _ (o O O.0 0 li U Q J Q Nw Q W N Q > U J O (6 0 0 E U �i U m J 0 Oi '6 U d 2 tlll o Z U � N- O N W O p_ _ j O N N n+ E' 3 N y°� N i (6 (6 = O N O •O U O E N d LL E U N N N Q (=6 C p O � LL 101 Q 4,5 W EQ= ; nOn Q N � WW W W H 0E O 'oyO -0(6 QLLI0�O i = O < LLI Q Z Z Q N (0- W E CU N O (Q6 S QC E�mCD� w -0`� 0 n�6EQ E=w N nn ¢ �.C�y O 79° 13'41.71 "W 0 0 ICD N 0 0 Lo- 0 CD - CD 0 LO 0 LO N n Precipitation Frequency Data Server NOAA Atlas 14, Volume 2, Version 3 Location name: Mebane, North Carolina, USA - Latitude: 36.0874*, Longitude:-79.2319° Elevation: 709.61 ft**�������� L '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/hour)1 Average recurrence interval (years) Duration 1 2 5 10 25 50 100 200 500 1000 4.74 5.63 6.54 7.15 7.82 8.24 8.63 8.92 9.22 9.41 5-min (4.33-5.18) (5.15-6.16) (5.98-7.15) (6.53-7.81) (7.10-8.53) (7.46-9.00) (7.76-9.41) (7.99-9.74) (8.18-10.1) (8.28-10.3) 3.79 4.50 5.24 5.72 6.23 6.56 6.85 7.07 7.29 7.40 10-min (3.46-4.14) (4.12-4.93) (4.79-5.72) (5.22-6.25) (5.66-6.80) (5.95-7.16) (6.17-7.48) (6.34-7.73) (6.47-7.97) (6.52-8.10) 3.16 3.77 4.42 4.82 5.27 5.54 5.78 5.94 6.12 6.20 15-min (2.88-3.45) (3.45-4.13) (4.04-4.83) (4.40-5.27) (4.78-5.75) (5.02-6.05) (5.20-6.30) (5.33-6.50) (5.43-6.69) (5.46-6.78) 2.16 2.61 3.14 3.50 3.90 4.17 4.42 4.63 4.87 5.02 30-min (1.98-2.37) (2.38-2.85) (2.87-3.43) (3.19-3.82) (3.54-4.26) (3.78-4.55) (3.98-4.83) (4.15-5.06) (4.32-5.32) (4.42-5.49) 1.35 1.64 2.01 2.28 2.60 2.83 3.05 3.25 3.49 3.66 60-min (1.23-1.48) (1.50-1.79) (1.84-2.20) (2.08-2.49) (2.36-2.83) (2.56-3.09) (2.74-3.32) (2.91-3.55) (3.10-3.82) (3.23-4.01) 0.801 0.970 1.20 1.37 1.59 1.75 1.91 2.06 2.26 2.40 [72F7]F (0.734-0.874) (0.890-1.06) (1.10-1.31) (1.25-1.50) (1.44-1.73) (1.58-1.91) (1.71-2.08) (1.83-2.24) (1.99-2.45) (2.10-2.62) 0.570 0.692 0.858 0.984 1.14 1.26 1.38 1.50 1.65 1.76 3-hr (0.524-0.621) (0.637-0.754) (0.789-0.935) (0.901-1.07) (1.04-1.24) (1.14-1.37) (1.24-1.50) (1.34-1.62) (1.45-1.79) (1.54-1.91) 0.346 0.419 0.520 0.598 0.701 0.782 0.864 0.946 1.06 1.14 [6F7]F (0.320-0.378) (0.387-0.457) (0.479-0.567) (0.549-0.650) (0.639-0.760) (0.707-0.847) (0.775-0.934) (0.839-1.02) (0.924-1.14) (0.987-1.24) 0.205 0.247 0.309 0.358 0.425 0.478 0.534 0.591 0.672 0.736 [�12-hr]F (0.189-0.223) (0.228-0.270) (0.284-0.337) (0.328-0.389) (0.386-0.460) (0.431-0.516) (0.476-0.575) (0.521-0.636) (0.581-0.723) (0.626-0.793) 0.120 0.145 0.181 0.208 0.245 0.275 0.304 0.335 0.376 0.408 [�24-hr]F (0.112-0.129) (0.135-0.156) (0.168-0.194) (0.194-0.223) (0.227-0.263) (0.254-0.295) (0.280-0.328) (0.307-0.361) (0.343-0.406) (0.371-0.442) 0.070 0.085 0.104 0.119 0.139 0.155 0.171 0.186 0.208 0.224 2-day]F (0.066-0.075) (0.079-0.091) (0.098-0.112) (0.111-0.128) (0.130-0.150) (0.144-0.166) (0.158-0.184) (0.172-0.201) (0.190-0.225) (0.205-0.243) 0.050 0.059 0.073 0.084 0.098 0.109 0.120 0.131 0.146 0.158 3-day]F (0.046-0.053) (0.056-0.064) (0.068-0.078) (0.078-0.090) (0.091-0.105) (0.101-0.117) (0.111-0.129) (0.121-0.142) (0.134-0.159) (0.144-0.172) 0.039 0.047 0.058 0.066 0.077 0.086 0.094 0.103 0.116 0.125 4-day]F (0.037-0.042) (0.044-0.050) (0.054-0.062) (0.061-0.070) (0.072-0.082) (0.079-0.092) (0.087-0.102) (0.095-0.112) (0.106-0.125) (0.114-0.136) 0.026 0.031 0.037 0.042 0.049 0.054 0.060 0.065 0.073 0.079 7-day]F (0.024-0.027) (0.029-0.033) (0.035-0.040) (0.040-0.045) (0.046-0.052) (0.051-0.058) (0.056-0.064) (0.061-0.070) (0.067-0.079) (0.072-0.086) 0.020 0.024 0.029 0.033 0.038 0.042 0.046 0.050 0.055 0.060 [10-day]F (0.019-0.022) (0.023-0.026) (0.027-0.031) (0.031-0.035) (0.036-0.040) (0.039-0.045) (0.043-0.049) (0.046-0.054) (0.051-0.060) (0.055-0.065) 0.014 0.016 0.019 0.021 0.024 0.027 0.029 0.032 0.036 0.038 20-day (0.013-0.014) (0.015-0.017) (0.018-0.020) (0.020-0.022) (0.023-0.026) (0.025-0.029) (0.027-0.031) (0.030-0.034) (0.033-0.038) (0.035-0.041) 0.011 0.013 0.015 0.017 0.019 0.021 0.023 0.024 0.026 0.028 30-day (0.011-0.012) (0.013-0.014) (0.015-0.016) (0.016-0.018) (0.018-0.020) (0.020-0.022) (0.021-0.024) (0.023-0.026) (0.025-0.028) (0.026-0.030) 0.010 0.011 0.013 0.014 0.016 0.017 0.018 0.019 0.021 0.022 [Fday]F (0.009-0.010) (0.011-0.012) (0.012-0.013) (0.013-0.015) (0.015-0.016) (0.016-0.018) (0.017-0.019) (0.018-0.021) (0.020-0.022) (0.021-0.024) 0.009 0.010 0.011 0.012 0.013 0.014 0.015 0.016 0.017 0.018 60-day (0.008-0.009) (0.010-0.010) (0.011-0.012) (0.012-0.013) (0.013-0.014) (0.014-0.015) (0.015-0.016) (0.015-0.017) (0.016-0.018) (0.017-0.019) 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_printpage.html?Iat=36.0874&Ion=-79.2319&data=intensity&units=english&series=pds 1 /4 5/20/2020 11001GON 1.000 7n as C 0100 C 2 2 w 0.010 CL CL Precipitation Frequency Data Server IRDS-based iiintenisity-duratiorii-frequency (DIF) curves Latitude: 36.0874', Longitude:-79.2319" 00011 1 1 1 1 1 1 ru ro ro M M ro ro M M A 4 r� 6 6 6 uA 6 rr) lD N rn zT LD Duill-ablon 10.000 L 1.000 Z, FA qa �1110, 4T W 0.010 Li 0.001 I. 1 -L L L L -j -L -L I 1 2 5 10 2�5 50 100 200 500 1000 Average recurrienice, interval Gyearsp NOAA Atlas 14, VOILIme 2, Version 3, Created fGMT): Wed May 20 201:08:24 2020 Back to Top Maps & aerials Small scale terrain Average recurrence imprVal (years) 2 5 10 25 50 'I 0,0 200 5010 11000 Duration "m 2. -d ay t O-tnwi 3-day t 5-rnO 4-day 301-7"riiin ,?-day 60-rnO 11 O-day 2-tif 20-cay. ................ 3-9" r 30-day 6-tir ................ 46-day t2-ry — 60-cf)ay 24411" https://hdsc.nws.noaa.gov/hdsc/pfds/pfds-printpage. htm I?Iat=36.0874& Ion =-79.231 9&data=intensity&units=english&series=pds 2/4 Precipitation Frequency Data Server Large scale map Roanoke Bra�kta�u�rg , j w,- v III in ton-Sewrr �r P rep 9� �G7u rW� mr fl, Rocky [MV�w rit G ru een e' 110011ci;rrm � a tewilVe 60inmu J'aw;k Large scale aerial https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?Iat=36.0874&Ion=-79.2319&data=intensity&units=english&series=pds 3/4 MAKIYA` IN11 Precipitation Frequency Data Server Back to Top US Department of Commerce National Oceanic and Atmospheric Administration National Weather Service National Water Center 1325 East West Highway Silver Spring, MD 20910 Questions?: HDSC.Questions@noaa.gov Disclaimer https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?Iat=36.0874&Ion=-79.2319&data=intensity&units=english&series=pds 4/4 Precipitation Frequency Data Server NOAA Atlas 14, Volume 2, Version 3 Location name: Mebane, North Carolina, USA - Latitude: 36.0874*, Longitude:-79.2319° Elevation: 709.61 ft**�������� L '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) Duration 1 2 5 10 25 50 ����� 100 200 500 1000 0.395 0.469 0.545 0.596 0.652 0.687 0.719 0.743 0.768 0.784 5-min]F (0.361-0.432) (0.429-0.513) (0.498-0.596) (0.544-0.651) (0.592-0.711) (0.622-0.750) (0.647-0.784) (0.666-0.812) (0.682-0.840) (0.690-0.857) 0.631 0.750 0.873 0.954 1.04 1.09 1.14 1.18 1.22 1.23 [10-min]F (0.577-0.690) (0.687-0.821) (0.798-0.954) (0.870-1.04) (0.944-1.13) (0.991-1.19) (1.03-1.25) (1.06-1.29) (1.08-1.33) (1.09-1.35) 0.789 0.943 1.10 1.21 1.32 1.39 1.44 1.49 1.53 1.55 [15-min]F (0.721-0.863) (0.863-1.03) (1.01-1.21) (1.10-1.32) (1.20-1.44) (1.25-1.51) (1.30-1.58) (1.33-1.63) (1.36-1.67) (1.37-1.70) 1.08 1.30 1.57 1.75 1.95 2.09 2.21 2.31 2.43 2.51 30-min (0.988-1.18) (1.19-1.43) (1.43-1.72) (1.60-1.91) (1.77-2.13) (1.89-2.28) (1.99-2.41) (2.07-2.53) (2.16-2.66) (2.21-2.75) 1.35 7 F 1.64 7 F 2.01 7 F 2.28 7 F 2.60 2.83 3.05 3.25 3.49 3.66 60-min (1.23-1.48) (1.50-1.79) (1.84-2.20) (2.08-2.49) (2.36-2.83) (2.56-3.09) (2.74-3.32) (2.91-3.55) (3.10-3.82) (3.23-4.01) 1.60 1.94 2.41 2.75 3.18 3.51 3.82 4.12 4.51 4.81 2-hr (1.47-1.75) (1.78-2.12) (2.20-2.63) (2.51-3.00) (2.88-3.46) (3.16-3.81) (3.42-4.15) (3.67-4.48) (3.98-4.91) (4.19-5.23) 2.08 2.58 2.96 3.43 3.80 4.15 4.50 4.95 5.30 [�3-hr:]F-1.7-1- (1.57-1.87) (1.91-2.26) (2.37-2.81) (2.71-3.21) (3.12-3.72) (3.43-4.11) (3.73-4.50) (4.01-4.87) (4.36-5.37) (4.62-5.75) 2.07 7 F 2.51 7 F 3.12 7 F 3.58 7 F 4.20 4.68 6.17 6.66 6.33 6.84 [6F7] (1.92-2.26) (2.32-2.74) (2.87-3.39) (3.29-3.89) (3.83-4.55) (4.23-5.07) (4.64-5.59) (5.03-6.12) (5.53-6.84) (5.91-7.41) 2.47 2.98 3.72 4.31 5.12 6.76 6.43 7.12 8.09 8.87 12-hr (2.28-2.69) (2.75-3.26) (3.42-4.06) (3.95-4.69) (4.65-5.54) (5.19-6.22) (5.74-6.93) (6.28-7.67) (7.00-8.71) (7.55-9.55) 2.88 F 3.48 F 4.33 F 5.00 F 5.89 6.59 7.30 8.03 9.01 9.78 24-hr (2.69-3.10) J (3.25-3.73) J (4.04-4.65) J (4.65-5.35) J (5.46-6.32) (6.09-7.08) (6.73-7.86) (7.37-8.66) (8.23-9.75) (8.89-10.6) 3.37 7 F 4.06 7 F 6.01 6.73 7 F 6.69 7.44 8.19 8.95 9.97 10.8 2tlay (3.16-3.62) (3.80-4.35) (4.69-5.37) (5.35-6.14) (6.23-7.18) (6.90-7.99) (7.57-8.82) (8.24-9.66) (9.14-10.8) (9.82-11.7) 3.57 4.28 5.27 6.02 7.04 7.83 8.63 9.44 10.5 11.4 3{iay (3.34-3.82) (4.01-4.59) (4.93-5.64) (5.63-6.45) (6.55-7.55) (7.26-8.41) (7.97-9.29) (8.69-10.2) (9.64-11.4) (10.4-12.4) 4.50 5.53 6.32 7.38 8.22 9.07 9.93 11.1 12.0 [�4tlay]F-3.7-6- (3.52-4.02) (4.22-4.82) (5.17-5.91) (5.90-6.76) (6.87-7.91) (7.62-8.82) (8.37-9.76) (9.13-10.7) (10.2-12.0) (10.9-13.1) 13 6.22 7.07 8.22 9.13 10.1 11.0 12.3 13.3[��]F-4.-377F-6. (4.06-4.60) (4.84-5.48) (5.85-6.64) (6.64-7.55) (7.70-8.79) (8.52-9.78) (9.34-10.8) (10.2-11.8) (11.3-13.2) (12.1-14.4) 4.89 5.81 6.96 7.87 9.09 10.0 11.0 12.0 13.3 14.3 10-day (4.61-5.21) (5.48-6.19) (6.56-7.42) (7.40-8.38) (8.53-9.70) (9.39-10.7) (10.3-11.8) (11.1-12.9) (12.3-14.4) (13.2-15.5) 6.52 F 7.69 F 9.07 F 10.2 F 11.7 12.9 14.1 15.4 7 7 17.1 7 7 18.4 20-day (6.16-6.91) J (7.26-8.15) J (8.57-9.62) J (9.61-10.8) J (11.0-12.4) J (12.1-13.7) (13.2-15.1) (14.2-16.4) (15.7-18.3) J (16.8-19.8) 8.10 9.53 11.0 12.2 13.8 15.0 16.2 17.4 19.0 20.2 30-day (7.68-8.57) (9.02-10.1) (10.5-11.7) (11.6-12.9) (13.0-14.6) (14.1-15.9) (15.2-17.2) (16.3-18.5) (17.7-20.3) (18.7-21.7) 10.3 7 F 12.0 7 F 13.8 7 F 15.1 16.9 18.3 19.6 21.0 22.7 24.1 45-day (9.78-10.8) (11.4-12.6) (13.1-14.5) (14.4-15.9) (16.0-17.8) (17.3-19.3) (18.5-20.7) (19.7-22.2) (21.2-24.2) (22.4-25.7) 12.3 14.4 16.2 17.6 19.4 20.8 7 7 22.1 7 7 23.3 7 7 25.0 7 7 26.2 60-day (11.8-12.9) (13.7-15.1) (15.5-17.0) (16.8-18.5) (18.5-20.4) (19.7-21.8) (20.9-23.3) (22.1-24.6) (23.5-26.4) (24.6-27.8) 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_printpage.html?Iat=36.0874&Ion=-79.2319&data=depth&units=english&series=pds 1 /4 5/20/2020 Precipitation Frequency Data Server PIDS-based clep,tgii-duiratiion-firequieiicy (DIDF) cuirves Latitude: 36.0874', Longitude:: -79.2319" VON 25 -c 20 5 --l- 7 0 T ru its its M M its ro M M 6 'A 6 6 � A 4 r.. 8 6 6 uA 8 ,-j Duill-ablon rH N ff) zT LD 30 25 5 0 1 2 5 10 2,5 50 100 200 500 1000 Averaigie recurrienice, interval Gyearsp NOAA Atlas 14, VOILIme 2, Version 3 Created fGMT): Wed May 20 201:07:32 2020 Back to Top Maps & aerials Small scale terrain Average recurrence imprVal (years) 2 5 10 25 50 'I 0,0 200 5010 11000 Duration "m 2. -d ay t O-tnwi 3-day t 5-rnO 4-d ay 301-7"riiin ,?-day 60-rnO 11 O-day 2-tif 20-cay. ................ 3-9" r 30-day 6-tir ................ 46-day t2-ry — 60-cf)ay 24411" https://hdsc.nws.noaa.gov/hdsc/pfds/pfds-printpage. htm I?Iat=36.0874& Ion =-79.231 9&data=depth&units=english&series=pds 2/4 Precipitation Frequency Data Server Large scale map Roanoke Bra�kta�u�rg , j w,- v III in ton-Sewrr �r P rep 9� �G7u rW� mr fl, Rocky [MV�w rit G ru een e' 110011ci;rrm � a tewilVe 60inmu J'aw;k Large scale aerial https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?Iat=36.0874&Ion=-79.2319&data=depth&units=english&series=pds 3/4 MAKIYA` IN11 Precipitation Frequency Data Server Back to Top US Department of Commerce National Oceanic and Atmospheric Administration National Weather Service National Water Center 1325 East West Highway Silver Spring, MD 20910 Questions?: HDSC.Questions@noaa.gov Disclaimer https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?Iat=36.0874&Ion=-79.2319&data=depth&units=english&series=pds 4/4 fl Iwl Doc No: 30017119 Recorded: 03/05/2020 04:28,55 PM Fee Amt: S26.00 Page 1 of 3 Excise Tax: $0.00 Orange County North Carolina Mark Chilton, Register of Deeds BK 6648 PG 1178 -1180 (3) m&�.k,12,- NORTH CAROLINA GENERAL WARRANTY DEED ExciseTax: None(Y Parcel Identifier 9835-02- 37 Verified by _ County on the T day of , 20 By: _ _ -- Mail/Box to: Davis, Humbert & Jennings, P.A. This instrument was prepared by: Charles E. Davis, without title examination Brief description for the Index: 14, TIUS DEED made this ` day of February, 2020, by and between GRANTOR HELEN S. MACE, unmarried C1:I:1►1�01�1 916 Mace Road Mebane, NC 27302 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 of her one-half undivided interest in that certain lot or parcel of land situated in the Cheeks Township, Orange County, North Carolina and more particularly described as follows: For property description reference is hereby made to "Exhibit A" attached hereto and made a part hereof. Property herein described IS NOT Grantor's principal residence. The Property hereinabove described was acquired by Grantor by instrument recorded in Book 260 at Page 1290, Orange County Registry. (00054464.DOC)NC Bar Association Form No. 3 0 1976, Revised 0 1977, 2002 Printed by Agreement with the NC Bar Association - 1981 BK 6648 PG 1179 DOC# 30017119 TO HAVE AND TO HOLD all of Grantor's one-half undivided interest in the aforesaid lot or parcel of land and all privileges and appurtenances thereto belonging to the Grantee in fee simple. 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 defend the title against the lawful claims of all persons whomsoever, other than the following exceptions: Restrictions, easements and rights of way of record pertaining to the property herein described. IN WITNESS WHEREOF, the Grantor has duly executed the foregoing as of the day and year first above written. 47. / 11,'c{ _ (SEAL) Helen S. Mace STATE OF IV lr#1 COUNTY OF a Notary Public ofthe County and State aforesaid, certify that Helen S. Mace personally appeared before me this day and acknowledged that the due execution of the foregoing instrument for the purposes therein expressed. WITNESS my hand and official stamp or seal, the �Q,� day of February, 2020. My Commission Expires: STATE OF COUNTY OF 9- i&-:X70IZO =ALAMANCE NE :&Oj o t� - 1� Notary Public I, a Notary Public of the County and State aforesaid, certify that personally appeared before me this day and acknowledged the due execution of the foregoing instrument for the purposes therein expressed. WITNESS my hand and official stamp or seal, the day of 2020. My Commission Expires: Notary Public The foregoing Certificate(S) of is/are certified to be correct. This instrument and this certificate are duly registered at the date and time and in the Book and Page shown on the first page hereof. Register of Deeds for County istant-Register of Deeds {00054464.1)OC}NC Bar Association Form No. 3 * 1976, Revised C 1977, 2002 Printed by Agreement with the NC liar Association - 1981 BK 6648 PG 1180 DOG# 30017119 "EXH I BIT A" BEGINNING at an iron stake corner with Andrews and Adams property and running thence with said Andrews and Morrow South 81 deg. 45' East 1444 ft. to an iron stake corner with Morrow and Sykes; running thence with said Sykes land South 6 deg. 30' West 2545 feet to an iron stake corner with Mace and Ellington property; thence with said Ellington North 76 deg. 30' West 256 feet to an iron stake corner with Sykes and Ellington; thence with said Sykes due North 200 feet to an iron stake corner with Sykes property; running thence with Sykes, Murdock and Straughn North 72 deg. West 550 feet to an iron stake corner with Straughn and Hobby; running thence with said Hobby North 9 deg. East 915 feet to an iron stake in old road; running thence again with said Hobby North 87 deg. West 373 feet to an iron stake; thence again with said Hobby due North 239 feet to an iron stake corner with Adams property; thence with said Adams North 7 deg. West 1130 feet to the Beginning and containing 57 acres, more or less, as surveyed by J. Ralph Weaver, Reg. Surveyor, on May 27, 1952. SAVE AND EXCEPT from the above described property is 4.9 acres4see record iA Beek 1313--'Ab- �N I83J -1O Page q'\— PIN No: 9825Q29lL7 Deed Book 6648 Page 1178 ^ Street Address_ 6519 US HWY 70 Mebane, NC 27302 Please Print: Property Owner: Carl & Helen Mace 1, the undersigned, registered property owner of the above referenced property, do hereby authorize Pine Gate Renewables to act on my behalf and talus all actions necessary for the processing, issuance and acceptance of this permit or certification and all standard and special conditions attached. Property Owner's Address (if different than property above): 916 Mace Rd Mebane, NC 27302 Telephone: We hereby certify the above information submitted in this application is true and accurate to the best of our knowledge, / / 1�r Authorized Signature Date Authorized Signature Date Carl Mace Helen Mace Printeda Printed Name civil Design CDCConcepts, PA Asheville Office • 828.252.5388 Waynesville Office • 828.452.4410 168 Patton Avenue Asheville, NC 28805 52 Walnut Street, Suite 9 Waynesville, NC 28786 www.cdcgo.com