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Home My WebLink AboutSW3240302_Supplement-EZ Form_20240307 SUPPLEMENT-EZ COVER PAGE FORMS 1.4ADEP PROJECT INFORMATION 1 Project Name Preserve at Forest Creak Phase2 2 P%act Area(ac) 104.01 —` 3 Coastal Wetland Area(ao) 0 4 Surface Water Area(ac) 3.75 _- 5 Is this project High or Low Densitl? - Hith 6 Does this project use an off-site SCM? No COMPLIANCE WITH 02H.1003(4) 7 Width of vegetated setbacksprovided(feet) 30 8 Wil the vegetated setback remain vegetated? Yes 9 If BUA is proposed in the setback,does it meet NCAC 02H 1003(4Xc4d)? No 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 tnfi tration System -_ 0 - 12 Bioretention Cell 0 13 Wet Pond 6 14 Stormwater Wetland 0 15 Permeable Pavement 0 16 Sand Filter 0 17 Rainwater Harvestng.tRWH) 0 18 Green Roof 0 19 Level Spreader-Filter Strip(LS-FS) 0 20 Disconnected Impervious Surface(DIS) � 0 21 Treatment Swa'e 0 22 Dry Pond 0 23 StormFilter 0 24 Silva Cell 0 25 Battler 0 26 Filterra 0 lFORMSIOADFD DESIGNER CERTIFICATION 27 Name and Title: Frank McMahan,PE 28 O•ganization• Landdesign 29 Street addressF 223 North Graham Street 30 City,State,Zip: Charlotte NC 28202 31 Phone number(s)• (704)333-0325 32 Ema I fmcmahan@landdesl9n.com Certification Statement: I certify,under penalty of law that this Supplement•EZ form and at supporting Information were prepared under my direction or supervision;that the information provided in the form is,to the best of my knowledge and be ief,true,accurate,end complete;and that the engineering plans, specifications,operation and maintenance agreements and other supporting information are consistent with the information provided here. Designer ,,`+.tit it +e. r ` off �,��,`j i •••--V • ,9 Signature of igner fit. !j. _ • 037773 ' .`‘ ;/0401 1-'rrrrrr islet MGv1 eaf Date IV O CO CO V CD ll1 I A CO N O CO cal-4 cn cn a g N A CO N — v _ LL g O w a W ig CIO 0 T'Tm gi:'O N 2 N 2 W Z Z 1 Q 1 1 ^Na 0 K Q O C O fly m Zc, c m j C �0 r . , r , O (s�+ O 0 m ID T O T 7 5. �IL'B. C Q QT�7o fATO) % p m �N N N • m 5 m m c W z 7 Z. 3 S c o F m d tD •co w co m m a o 9i114 � ag GI �� 3yc O-.r W..� �� m a H ��y �� w aa•sa m p v °,�$, N m vioRo m � '�' 03m g.N g.!0) g �g CO c aim 7a p a. mar,7 IF4I I ax152 � v. 11111 0 o-•3 " O o lilt II F" Z n• . c o ID CO 5. W fg c N .mg. .mg. 3 i a c ' R. a n Er _ :3 a . 2. a °�j 5. OmN 5m 0 y o u g I og m 2o � Pi x a Ps O o 5 N N • O , j r Ol A.N Gl� it a IJ CO�i 1v N' m c �u 6) zg_g_ g ZZ Z Z EEZwc"ti, `WS,Z I c4152g a o,j Doi g DDDeaaa D D w WyDN� r ro ...VI corn �ii a m f 1 063' V 1 _, h'h 0.1 z ET Dp m oap 0 I -N.. -N+. y.. N N N V~ 0 3 I I 1 1 1 r 1 1 , 1 1 13 ZAV I .4 coNI O !co DcmSmDDD D D A D DcoD D 'l a a corn �c w w a 1 w El. i. Caw0 r CD r I I 0 c�i _I� 7 p o, mtO �� iN c'' wWaom 0 g 0 j iv Z Z W '.�A I ZL N N N N . E C- .—-,2 td Dm , cnDDD D D vc D..!DmN cm 2 2gg,„ +z Z.. i I-N.. �.' �.— q.-N.r .N., .N.,.N..NOD co I AI IP Z100-, V -. Oi 2 CAN v o'0)0C„-1 0 V G 6 Z Z IZ IZ Oi Z FO'Z cnio Z o g (A1084. 04.' w. T T oy-• m a D D D 'D co D m D°'D ti—. SI r�raw n�.' I N 4, A VIN CO ',CV rN Z X � i 4.,-. 4.;4,4.1 0 a O i , r i - r r I .. ' • z g Of �l CO A N co m 2 9 C1�ow!z�� z ,z g �ozN � aaIy N ¢V O 130 a T,o3 �iDDD D !D DS.D.ID NOIA o O.. I 4. 4. 4. 4.14. ' 0 o G W 1 r 1' r , I - r r I T i i I 71—. •• ucDDD D D Co DIc0oDCo. D o 4 up x , J ra WET POND 11orainage area number 7 _ 8_ _ 9 10 11 12 21,Minimum required treatment volume(Cu ft) i 35481 d { 39288 d 43108 d 29955 d I-- 17074 d } 16861 d 3 Is the SCM sized to treat the SW from all surfaces at build-out? Yes Yes Yea Yee ` Yes Yes 4 Is the SCM located away from contaminated soils? Yea Yes Yes Yea Yea Yes 5 What are the side slopes of the SCM(H:V)? 3:1 3:1 3:1 3:1_ � .3:1 3:1 6 Does the SCM have retaining walls.gabion walls or other Yes No Yes Yes Yea Yes _ engineered side slopes? 7'Are the inlets,outlets,and receiving stream protected from erosion Yes Yes Yes Yes Yes Yes 10-year storm)? BI Is there an overflow or bypass for inflow volume in excess of the idesgnvolume7 Yes Yes Yes Yea Yes Yes 9 What Is the method for dewatering the SCM for maintenance? Pump(pralerredj Purnn jpreferred) Pump(preferred) Pump(preferred) Pump)preferred) Purrrp(QnderredI 10 If avpliceble.will the SCM be cleaned out after construction? Yes Yes _ Yes Yes Yes Yes 11 Does the maintenance access compy with General MDC(8)? Yes_ Yes Yes Yes Yes Yea 12 Does the drainage easement comply with General MDC,91? Yes Yes Yea Yes Yes Yes 13 If the SCM is on a single family lot,does(will?)the plat comply with WA N/A N/A NIA N/A N/A ` General MDC;1017 ------.----�_ __., 14 Is there an O&M Agreement that compiles with Genera MDC(11)? Yes Yes Yes Yes Yes Yea 15 Is there an O&M Plan that complies with General MDC(12)? Yes Yes Yes Yes Yes_ _ Yes 16 Does the SCM follow the device specific MDC? Yes Yes Yes Yes Yes Yes 17 Was the SCM designed by an NC licensed professional? Yes Yes - Yes Yes Yes Yes =ID MPG 1 OM031t.1111 - - 18 S AI iziny method used ��SAIDA SA/DA SA/DA SAIDA SAIDA SA/DA 19 Has a stage/storage table been provided in the calculations? Yes Yes Yes Yes Yes - Yes 20 Elevation of the excavated main pool depth(bottom of sediment 639.50 616.50 1349.50 648.50 827.50 606.50 removal(fmsl) __. 21 Elevation of the main pool bottom(top of sediment removal(fms) 640.00 617.00 650.00 650.00 828.00 609.00 22 Elevation of the bottom of the vegetated shelf(frost) 843.50 621.50 853.50 654.50 632.50 813.50 23 Elevation of the permanent pool(fmsl) 844.00 622.00 654.00 655.00 633.00 614.00 24 Elevation of the top of the vegetated shelf(fmsl) 844.50 822.50 654.50 655.50 633.50 614.50 25 Elevation of the temporary pool(frost) 846.30 624.00 658.25 658.80 634.75 815.75 26 Surface area of the main pe rmanent pool(square feet) ' 20972 15467 19530 15439 8265 7955 27 Volume of the main permanent pool(cubic feet) 71528 d 62285 d 69571 d 61875 d 31389 d 29266 d 28 Average depth of the main pool(feel) 3.41 ft 4.03 ft 3.56 ft 4.01 ft 3.80 ft 3.68 ft 29 Average depth equation used - Equation 2 Equation 2 Equation 2 Equation 2 Equation 2 Equation 2 30 If using equation 3,main pool perimeter(feet) N/A N/A N/A N/A N/A ____NIA 31 If using equation 3,width of submerged veg.shelf jfeet) N/A NIA N/A N/A NIA_ NIA N/A 32 Volume of the forebay(cubic feet) - 13 56 CFI- 11358 d 10548 d 10040 d 4934 d 4834 d 33 Is this 15-20%of the volume in the main pool? Yes Yes Yes Yes Yes _ Yes __ 34 Clean-out depth for forebay(inches) 6 In 8 in 8 in 6 in 6 in 6 In r 35 Design volume of SCM(cu ft) -- 63480 d----'--- 42439 cf 58209 cf 38076 d 18870 d 19641 d 36 Is the outlet an orifice or a weir? Orifice Orifice Orifice Orifice Orifice Orifice 37 If orifice,orifice diameter(inches) 3.00 In 3.00 in _� 3.00 in- -3.00 in 2.00 In 2.25 in 38 If weir weir height(inches) N/A �- NIA N/A N/A N/A NIA 39 If weir,weir length(inches) N/A NIA N/A N/A -,_ _ N/A_ N/A 40 Drawdown time for the temporary pool(day)) 3.89 2.82 3.3 2.65 2.81 2.45 41 Are the inlet(s)and outlet located in a manner that avoids short- Yes Yes Yes Yes Yes Yes circuiting? - _ --, 42 Are berms or baffles provided to improve the flow path? No No _ No No No No p p -..- -- 43 Dept"of forebay at entrance(inches) 58 in 70 In 58 En 70 in 70 in 70 In 44 Depth of forebay at exit(Inches) - 54 in 68 In 54 in ^ 86In 68 in 66 In 45 Does water flow out of the forebay in a non-erosive manner? Yes Yes Yes Yea _ Yea Yea 46 Width of the vegetated shelf ifeetj 8ft 8ft 8ft 6 ft 8ft 8 ft 47 Slope of vegetated shelf(H:V) 6:1 8:1 _ 6:1 6:1 6:1 _ _ 8:1 _ 48 Does the orifice drawdown from below the top surface of the Yes Yes Yea Yes Yes Yes - permanent pool? 49 Does the pond minimize impacts to the receiving channel from the 1- Yes Yes Yea Yea Yea Yes 1r,24-hr storm? Are fountains proposed?(If Y.please provide documentation that -- 50 MDC(9115 met) Na Na No No No No 51 Is a trash rack or other device provided to protect the outlet system? Yes Yes Yea Yes Yes Yea 52 Are the dam and embankment planted in non-dumping turf grass? Yes Yes Yes Yes Yes Yes 53 Species of turf that will be used on the dam and embankment HYBRID HYBRID HYBRID HYBRID HYBRID ~HYBRID --__ _- BERMUDA . BERMUDA .. BERMUDA BERMUDA I BERMUDA BERMUDA 54 Has a plantirg plan been provided for the vegetated shelf? as Yes Yes Yes l Yes Yes ADDITIONAL INFORMATION 55 Please use this space to provide any additional information about the wet pond* 2