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Home My WebLink AboutSW6220203_Supplement-EZ Form_20220225SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 1 Project Name Dollar General - Raeford (Hoke County) 2 Project Area (ac) 2.84 3 Coastal Wetland Area ac - 4 Surface Water Area ac - 5 Is this pro ect High or Low Density? High 6 Does this project use an off -site SCM? No COMPLIANCE WITH 02H.1003(4)f 7 Width of vegetated setbacks provided (feet)- 8 Will the vegetated setback remain vegetated? N/A 9 If BUA is proposed in the setback, does it meet NCAC 02H.1003(4)(c-d)? No 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 1 12 Bioretention Cell Wet Pond 0 13 0 14 Stormwater Wetland 0 15 JPermeable Pavement 0 16 Sand Filter 0 17 Rainwater Harvesting RWH 0 18 Green Roof 0 19 Level Spreader -Filter Strip LS-FS 0 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 Dry Pond 0 23 StormFilter 0 24 Silva Cell 0 25 Ba filter 0 26 Filterra 0 FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Matt Lowder, PE 28 Organization: Bowman North Carolina, Ltd. 29 Street address: 4006 Barrett Dr, Suite 104 30 City, State, Zip: Raleigh, NC 27609 31 Phone numbers : 919-553-6570 32 Email: mlowder@bowman.com Certification Statement: I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision; that the information provided in the form is, to the best of my knowledge and belief, true, accurate, and complete; and that the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here. Si nature ❑ esigner 2/0fill- Sea/ Date DRAINAGE AREAS 1 Is this a hioh densitv proiect? Yes 2 If so, number of drainage areas/SCMs 1 3 Does this project have low density areas? No 4 If so, number of low density draina a areas 0 5 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site i 4 Type of SCM Infiltration Basin 5 Total drainage area (sq ft 142297 93972 6 Onsite drainage area (sq ft 123745 75420 7 Offsite drainage area (sq ft) 18552 18552 8 Total BUA in project (sq ft) 58416 sf 58211 sf 9 New BUA on subdivided lots (subject to permitting) (sq ft - 10permitting) New BUA not on subdivided lots (subject to s - - 11 Offsite BUA (sq ft 15492 sf 15492 sf 12 Breakdown of new BUA not on subdivided lots: Parking (sq ft 29892 sf 29892 sf Sidewalk (sq ft) 2392 sf 2187 sf Roof (sq ft 10640 sf 10640 sf Roadway s ft - Future (sq ft)- Other, please specify in the comment box below (sq ft 13 New infiltrating permeable pavement on subdivided lots (sq ft 14 New infiltrating permeable pavement not on subdivided lots (sq ft 15permitting) Existing BUA that will remain (not subject to s ft 16 Existing BUA that is already permitted (sq ft) - 17 Existing BUA that will be removed (sq ft - 18 Percent BUA 35% 62% 19 IDesiQn storm (inches) 1.0 in 20 IDesign volume of SCM cu ft 4763 cf 21 lCalculation method for design volume Simple Method ADDITIONAL INFORMATION 22 Please use this space to provide any additional information about the drainage area(s): INFILTRATION SYSTEM 1 Drainage area number 1 1 2 1 Minimum required treatment volume (cu ft) 4763 cf 3 Is the SCM sized to treat the SW from all surfaces at build -out? Yes 4 Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H:V or enter "Vertical' for trenches)? 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No 7 Are the inlets, outlets, and receiving stream protected from erosion 10- ear storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes 9 What is the method for dewatering the SCM for maintenance? Pump (preferred) 10 If applicable, will the SCM be cleaned out after construction? Yes 11 Does the maintenance access comply with General MDC (8)? Yes 12 Does the drainage easement comply with General MDC (9)? Yes 13 If the SCM is on a single family lot, does (will?) the plat comply with General MDC 10 ? N/A 14 Is there an O&M Agreement that complies with General MDC (11)? Yes 15 Is there an O&M Plan that complies with General MDC 12 ? Yes 16 Does the SCM follow the device specific MDC? Yes 17 lWas the SCM desinned by an NC licensed orofessional7 Yes 18 Proposed slope of the subgrade surface 0 19 Are terraces or baffles provided? No 20 IType of pretreatment: Forebay Snik Onfn 21 Was the soil investigated in the footprint and at the elevation of the infiltrations stem? Yes 22 SHWT elevation (fmsl) 369.90 23 Depth to SHWT per soils report (in) 121.20 24 Ground elevation at boring in soils report (fmsl) 380.00 25 Is a detailed hydrogeologic study attached if the separation is between 1 and 2 feet? N/A 26 Soil infiltration rate (in/hr) 5.00 27 1 Factor of safety (FS) (2 is recommended): 2.00 I Fiavallons 29 Bottom elevation fmsl 374.8 ft 30 Storage elevation fmsl 377. ft 31 bypass elevation (fmsl) 380.2 ft For Basins Onl 32 Bottom surface area (ft) 1599 ft 33 IStorage elevation surface area (ft) 3385. ft Fnr TrwnrhBc Anly 34 Length (ft) 35 Width (ft) 36 Perforated pipe diameter, if applicable (inches) 37 Number of laterals 38 Total length of perforated piping 39 IStone type, if applicable 40 Stone orosit 41 Is stone free of fines? 42 Is the stone wrapped in geotextile fabric? 43 Has at least one inspection port been provided? Volumes/Drawdown 44 IDesign volume of SCM (cuff) 45 1 Time to draw down (hours) ADDITIONAL INFORMATION 46 Please use this space to provide any additional infiltration system(s): about the 4763 cf Infiltration 1 6:33 PM 2/9/2022