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Home My WebLink AboutSW6240103_Supplement-EZ Form_20240425 SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Leander Lee Preserve Subdivision ( 2 ;Project Area(ac) 56 3 Coastal Wetland Area(ac) 0 4 i Surface Water Area(ac) 0 16 f5 Is this project High or Low Density? Low $ ( 6 *Does this project use an off site SCM? NO.. ... .._..._ _ 1i COMPLIANCE WITH 02H 1003(4) ; . , .. mow,. 1 7 Width of vegetated setbacks provided(feet) 30 8 Will the vegetated setback remain vegetated? Yes 3 9 ,If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? N/A j 1 10 Is streambank stabilization proposed on this project? No j NUMBER AND TYPE OF SCMs 0 11 Infiltration System l 12 Bioretention Cell 13 Wet Pond 14 Stormwater Wetland 15 Permeable Pavement 16 ::Sand Filter 1 17 Rainwater Harvesting(RWH) i 18 Green Roof 19 :Level Spreader-Filter Strip(LS-FS) 1 1 20 Disconnected Impervious Surface(DIS) 21 Treatment Swale 22 ;Dry Pond p 23 StormFilter 24 Silva Cell 25 ,Bayfilter ( 26 Filterra FORMS LOADED DESIGNER CERTIFICATION-- _ --o— �— i 27 :,Name and Title: C. Scott Brown, PE E I y 28 Organization: 4D Site Solutions, Inc. 29 ;Street address: 409 Chicago Drive-Ste 112 30 City,State,Zip: Fayetteville, NC 28306 3 31 'Phone number(s): 910-426-6777 t + 32 ;Email sbrown(4dsitesolutions.com 1 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 -CN Rp ' (:\ n GFE� � Ip• �2 ' \ r V� • LA _ Signature of esigner L • 027452 • - '',,,Seal,,```` 04 , Date t , DRAINAGE AREAS 1 rls this a high density project? No 2 f If so, number of drainage areas/SCMs 0 3_ Does this project have low density areas? Yes 4 I If so,number of low density drainage areas 1 1. Is all/part of this project subject to previous rule t. 5 :versions? No FORMS IOADED !DRAINAGE AREA INFORMATION Entire Site LD 1 4 !Type of SCM Low Density Low Density 5 !Total drainage area(sq ft) 4 068z.504 4 068 504 6 IOnsite drainage area(sq ft) 4 068,504 4 068 504 7 Offsite drainage area(sq ft) 0 t 0 8 !Total BUA in project(sq ft) tI 974284 sf 974284 sf BUA on subdivided lots(subject to New rtg)(sgft1 725200 sf _.. 725200 sf __ I 9 ?permtten I New BUA not on subdivided lots(subject to 1 10 I permittin_gl(sf) 249084 sf 249084 sf 11 Offsite BUA(sq ft) sf 12 (Breakdown of new BUA not on subdivided lots:It t Parking(sq ft) I Sidewalk(sq ft) 4 j_ Roof(sq_ft) r _ Roadway(sq ft) 249084 sf 249084 sf !, -Future(sq ft). 1 Other, please specify in the comment box i. ;below(sq ft) t t ;New infiltrating permeable pavement on f ^; t 1 13 ;subdivided lots(sq ft) ; t New infiltrating permeable pavement not on r 1 14 subdivided lots(sq ft) t a z Existing BUA that will remain(not subject to t lt, I 1.15 ;permitting)(sq ft) t at i 16 !Existing BUA that is already permitted(sq ft) 17 !Existing BUA that will be removed(sq ft) 18 I Percent BUA 24% 24% - ( 19 1Design storm(inches) 20 Design volume of SCM(cu ft) f i21 !Calculation method for design volume P lease use this spTION ADDITIONAL INFORMATION ace to provide any additional information about the w 22 !drainage area(s): i, t P i LOW DENSITY DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H.1003 1 Is project below density thresholds set forth in the applicable stormwater rule? Yes 2 Does project maximize dispersed flow and minimize channelization of flow? Yes i 3 ,Has the use of piping been minimized per.1003(2)(c)? Yes r 4 Side slopes of the vegetated conveyances(H:V) 3 5 Maximum velocity in the vegetated conveyances during the 10-year storm? 4.43 � 6 ,Are curb outlet swales proposed? No t a 7 Maximum longitudinal slope of curb outlet swale(s)(%) N/A I 8 Bottom width of curb outlet swale(s)(feet) N/A 1 9 Maximum side slope of curb outlet swale(s)(H:V) N/A 10 Minimum length of curb outlet swale(s)(feet) N/A 11 Are treatment swales used instead of curb outlet swales? 12 Is stormwater released at the edge of the setback as dispersed flow? N/A t 13 Have stormwater outlets been designed to prevent downslope erosion? Yes a, 14 Are variations to rule.1003 proposed? No ADDITIONAL INFORMATION- -w .u-� .�.,., ,,,� . �.,..,�,�..,� .. 15 Please use this space to provide any additional information about this low density project: ► Swale Drainage . BUA i Pervious Area : Q Slope V,,,,,,, V,:,„„ Flow depth # act (ac) fact area . o WO (%) Ifps) (fps) (ft) 1 0.72 0.17 0.56 0.45 2.54 2.35 5.00 2.26 0.53 2 0.99 0.15 0.84 0.40 3.09 0.90 5.00 1.37 0.78 3 1.47 0.23 1.24 0.40 4.60 1.58 5.00 2.21 0.75 4 2.32 0.54 1.78 0.45 6.53 1.65 5.00 2.56 0.84 5 5.35 0.82 4.53 0.40 11.30 0.53 5.00 1.59 1.46 __.6 8.18 1.26 6.92 0.40 15.68 2.50 5.00 4.43 1.01 7 8.69 1.34 7.35 0.40 16.66 0.57 5.00 1.89 1.41 8 0.23 , 0.05 0.18 0.45 0.81 2.53 5.00 1.58 0.34 9 0.15 0.06 0.09 0.55 0.65 0.55 5.00 0.60 0.52 10 2.08 0.48 1.60 0.45 5.85 1.00 5.00 1.79 0.76 11 0.11 0.04 0.07 0.55 0.47 0.75 5.00 0.64 0.42 12 0.18 . - 0.07 0.11 0.55 0.77 0.75 5.00 0.76 0.50 13 4.09 0.94 ' 3.15 0.45 9.72 i 0.90 5.00 2.03 0.97 14 1.51 0.58 0.93 0.55 4.39 1.95 5.00 2.46 0.69 15 1.16 0.18 0.98 0.40 3.63 1.79 5.00 2.18 0.67 16 1.14 0.18 0.96 0.40 3.57 1.79 5.00 2.17 0.66 17 1.61 0.25 1.36 0.40 5.04 0.75 5.00 1.47 0.99 18 0.30 0.15 0.18 0.55 1.29 1.48 5.00 1.36 0.48 19 1.19 0.46 0.73 0.55 3.46 0.53 5.00 1.05 0.97 20 0.77 0.30 0.47 0.55 2.65 1.65 5.00 1.87 0.61 21 0.41 0.16 0.25 0.55 1.76 1.58 5.00 1.58 0.53 23 24 2.68 0.62 2.06 0.45 7.54 3.50 5.00 4.00 0.53 25 1.98 0.61 1 37 0.50 6.19 3.04 5.00 3.59 0.68 26 1.55 0.24 1.31 0.40 4.85 1.24 5.00 I 1.95 0.83 27 . 28 _._._. 29 30