The URL can be used to link to this page

Home My WebLink AboutSW6231202_Supplement-EZ Form_20240321 SUPPLEMENT-EZ COVER PAGE LOAD SUPPLEMENT FORMS PROJECT INFORMATION 1 Project Name Dunn,NC-Petco 2 Project Area(ac) 1.68 3 Coastal Wetland Area(ac) 0 4 Surface Water Area(ac) 0 5 Is this project High or Low Density? High 6 Does this project use an off-site SCM? No COMPLIANCE WITH 02H.1003(4) 7 Width of vegetated setbacks provided(feet) 30 8 Will the vegetated setback remain vegetated? Yes 9 If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? N/A 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 Bioretention Cell 1 13 Wet Pond 14 Stormwater Wetland 15 Permeable Pavement 16 Sand Filter 17 Rainwater Harvesting(RWH) 18 Green Roof 19 Level Spreader-Filter Strip(LS-FS) 20 Disconnected Impervious Surface(DIS) 21 Treatment Swale 22 Dry Pond 23 StormFilter 24 Silva Cell 25 Bayfilter 26 Filterra LOAD SUPPLEMENT FORMS DESIGNER CERTIFICATION 27 Name and Title: Andrew Maysent 28 Organization: McClure Engineering Company 29 Street address: 335 SE Oralabor Rd 30 City,State,Zip: Ankeny,IA 50021 31 Phone number(s): 515-512-1361 32 Email: amaysent@mcclurevision.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. Designer SS/• SEAL — Signature of Designer 045881 ti c 03.20.24 Seal Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 3 Does this Droiect have low densit areas? No 4 If so, number of low density drainage areas 0 5 Is all/part of this project subject to previous rule versions? No CLICK TO LOAD FORM DRAINAGE AREA INFORMATION Entire Site 1 2 4 Type of SCM Bioretention Bioretention 5 Total drainage area (sq ft 73050 63957 6 Onsite drainage area (sq ft 73050 63957 7 Offsite drainage area (sq ft 0 0 8 Total BUA in project (sq ft 46265 sf 46265 sf 9permitting) New BUA on subdivided lots (subject to s ft sf sf 10permitting) New BUA not on subdivided lots (subject to sf 46265 sf 46265 sf 11 Offsite BUA (sq ft sf sf 12 Breakdown of new BUA not on subdivided lots: 0 0 - Parking (sq ft 29813 sf 29813 sf - Sidewalk (sq ft 5709 sf 5709 sf - Roof (sq ft 10743 sf 10743 sf - Roadway s ft \ - Future (sq ft sf - Other, please specify in the comment box below (sq ft sf sf 13 New infiltrating permeable pavement on subdivided lots (sq ft sf sf 14 New infiltrating permeable pavement not on subdivided lots (sq ft sf sf 15permitting) Existing BUA that will remain (not subject to s ft sf sf 16 Existing BUA that is already permitted (sq ft sf sf 17 Existing BUA that will be removed (sq ft sf sf 18 Percent BUA 63% 72% 19 Design storm inches 1.0 in 1.0 in 20 Design volume of SCM cu ft 3046 sf 3046 cf 21 Calculation method for design volume NRCS NRCS ADDITIONAL INFORMATION 22 Please use this space to provide any additional information about the drainage area(s): BIORETENTION CELL area n Minimum required treatment volume GENERAL MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build -out? Yes 4 Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H:V)? 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No 7 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes g lWhat 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 Was the SCM designed by an NC licensed professional? Yes BIORETENTION CELL MDC FROM 02H .1052 18 SHWT elevation (fmsl) 164.00 19 Bottom of the bioretention cell (fmsl) 166.25 20 Ponding depth of the design storm (inches) 12 in 21 Surface area of the bioretention cell (square feet) 3303 sf 22 Design volume of SCM cu ft 3046 cf 23 Is the bioretention cell used for peak attenuation? Yes 24 Depth of peak attenuation over planting surface (in) 18 in 25 j Height of peak attenuation outlet above the planting surface (in) 18 in 26 Infiltration rate of the in situ soil (inch/hour) in/hr 27 Diameter of the underdrain pipes (if applicable) 4 in 28 Does the design include Internal Water Storage (IWS)? yes 29 if so, elevation of the top of the IWS (fmsl) 168 30 Elevation of the planting surface (fmsl) 170.5 31 What type of vegetation will be planted? (grass, trees/shrubs, other)? Grass 32 IMedia depth (inches) 30 in 33 Percentage of medium to coarse washed sand by volume 75-85% 34 Percentage of fines (silt and clay) by volume 8-10% 35 Percentage of organic matter by volume 5-10% 36 Type of organic material pine bark fines 37 Phosphorus Index (P-Index) of media (unitless) <50 38 Will compaction be avoided during construction? Yes 39 Will cell be maintained to a one inch/hour standard? Yes 40 Depth of mulch, if applicable (inches) 41 Type of mulch, if applicable 42 How many clean out pipes are being installed? 2 43 Type of pretreatment that will be used: Swales ADDITIONAL INFORMATION 44 Please use this space to provide any additional information about the bioretention cell(s): Bioretention 2 2:38 PM 6/20/2024