Kubota of Fayetteville - 1355-Supplemental form

QuantityInfiltration SystemBioretention CellWet Pond 1Stormwater WetlandPermeable PavementSand FilterRainwater HarvestingGreen RoofLevel Spreader-Filter StripDisconnected Impervious SurfaceTreatment SwaleDry PondApplicant:Name and Title:Organization:Street address:City, State, Zip:Phone number(s):Email:DesignerCertification Statement:Signature of Designer24-Apr-18DateEmail:PO Box 205Fayetteville, NC 28302(910) 309-8844Company:Contact:Mailing Address:City, State, Zip:Project Name:AddressCity / TownCarolina Sun Investments, LLCJack HorneKubota of FayettevilleFayettevilleMiddle River LoopSUPPLEMENT-EZ FORM COVER PAGESealviolations as well as a report being made to my professional board. - that the information provided in the form is, to the best of my knowledge - that the engineering plans, specifications, operation and maintenancethe information provided here.I am aware that there are significant penalties for submitting falseinformation including the possibility of fines and imprisonment for knowing and belief, true, accurate, and complete; andagreements and other supporting information are consistent with I certify, under penalty of law: that this Supplement-EZ form and all supportinginformation were prepared under my direction or supervision; Designer information for this project:Location(s)Please indicate the types, quantities and locations of SCMs that will be used on this project:[e-mail] number(s):C. Scott Brown, PE4D Site Solutions, Inc.409 Chicago Drive, Suite 112Fayetteville, NC [e-mail] of site, northwest of proposed buildingCover Page110:31 AM 4/30/2018
WET POND1 Drainage area number1 Total coastal wetlands area (sq ft)0 - Parking / driveway (sq ft)146678 sfTotal surface water area (sq ft)0 - Sidewalk (sq ft)1490 sfTotal drainage area (sq ft)204297 sf - Roof (sq ft)22500 sfBUA associated with existing development (sq ft) 0 - Roadway (sq ft)0Proposed new BUA (sq ft)170668 sf - Other, please specify in the comment box below (sq ft) 0 Percent BUA of drainage area84%Total BUA (sq ft)170668 sfDesign rainfall depth (in)1.0 inMinimum volume required (cu ft) 13790 cfDesign volume of SCM (cu ft)71955 cf#1 Is the SCM sized to treat the SW from all surfaces at build-out? Yes#7 If applicable, with the SCM be cleaned out after construction?Yes#2 Is the SCM located on or near contaminated soils? No#8 Does the mainetenance access comply with General MDC (8)?Yes#3 What are the side slopes of the SCM (H:V)? 3:1#9 Does the drainage easement comply with General MDC (9)?Yes#3 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No#10 If the SCM is on a single family lot, does the plat comply with General MDC (10)?#4 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes#11 Is there an O&M Agreement that complies with General MDC (11)?Yes#5 Is there a a bypass for flows in excess of the design flow? Yes#12 Is there an O&M Plan that complies with General MDC (12)?Yes#6 What is the method for dewatering the SCM for maintenance?Pump (preferred)#13 Was the SCM designed by an NC licensed professional?Yes#1 Method usedSA/DA#6 Width of the vegetated shelf (feet)6 ft#1 Surface area of the main permanent pool (square feet) 11893 sf#6 Location of vegetated shelf@ Normal Pool#1 Volume of the main permanent pool (cubic feet) 32596 cf#6 Elevation of top of shelf (fmsl)84 ft#2 Average depth of the main pool (feet) 3.1 ft #6 Elevation of bottom of shelf (fmsl)83 ft#2 Was the vegetated shelf included in the calculation of average depth? No #6 Slope of vegetated shelf (H:V)6:1#2 Elevation of the bottom of the permanent pool (fmsl) 80 ft #7 Diameter of drawdown orifice (inches)2.0 in#2 Elevation of the top of the permanent pool (fmsl) 83.5 ft #7 Drawdown time for the temporary pool (hours)77 hrs#2 Elevation of the top of the temporary pool (fmsl) 84.94 ft #7 Does the orifice drawdown from below the top surface of the permanent pool?Yes#3 Depth provided for sediment storage (inches) 12 in#8 Does the pond minimize impacts to the receiving channel from the 1-yr, 24-hr storm? Yes#4 Are the inlet(s) and outlet located in a manner that avoids short-circuiting?Yes #9 Are fountains proposed?No#9 If yes, is documentation provided per Wet Pond MDC (9)?#10 Is a trash rack or other device provided to protect the outlet system? Yes#5 Volume of the forebay (cubic feet) 6487#11 Are the dam and embankment planted in non-clumping turf grass? Yes#5 Is this 15-20% of the volume in the main pool? Yes#11 Species of turf that will be used on the dam and embankment Bermuda Sod#5 Depth of forebay at entrance (inches) 42 in#11 Describe the planting plan for the vegetated shelf:#5 Depth of forebay at exit (inches) 30 in#5 Does water flow out of the forebay in a non-erosive manner? Yes#5 Clean-out depth for forebay (inches) 30 in#5 Will the forebay be cleaned out when the depth is reduced to less than the above? YesKubota of FayettevilleBreak down of BUA in the drainage area (both new and existing):COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAMStormwater program(s) that apply (please specify):Phase II Post-Construction SWWET POND MDC FROM 02H .1053#4 Describe any measures, such as berms or baffles, that will be taken to improve the flow path:N/AVegetated shelf to be planted with a combination of shallow water and shallow land plants, spacings to be a maximum of 18 inches on center. Fertilizer shall be used according to recommendation from soil analysis. See plan details for listing of plants to be used.ADDITIONAL INFORMATIONPlease use this space to provide any additional information about this wet pond that you think is relevant to the review:GENERAL MDC FROM 02H .1050THE DRAINAGE AREAWet Pond110:31 AM 4/30/2018