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Home My WebLink AboutSW3200702_Supplemental EZ form_20200910SUPPLEMENT-EZ COVER PAGE LOAD SUPPLEMENT FORMS PROJECT INFORMATION 1 Project Name 2 Project Area ac South Main Street Townhomes 3.36 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 Is BUA other that as listed in .1 0034 c-d out of the setback? Yes _9_ 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System _ Bioretention Cell 806.5 12 0 13 Wet Pond 0 0 14 _ _ S.tormwater Wetland Permeable Pavement f 15 0 16 17 Sand Filter Rainwater Hafvestin RW I 1 0 18 Green Roof _ Level Spreader -Filter Strip LS-FS 0 19 811.5 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 Dry Pond 24 23 StormFilter 0 Silva Cell 0 k24 25 Ba alter 0 26 Filterra 809.5 LOAD SUPPLEMENT FORMS DESIGNER CERTIFICATION 27 Name and Title: Jonathan Carter 28 Organization: Bluestone Land Management 29 ^ Street address: 470 N. Broad St 30 City, State, Z1 : � Mooresville, NC 28115 31 Phone numbers): 704-664-1973 jonathan.carter@bluestonelandmanagement.com 32 Email: 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. it SEAL x r: 3M x AN IA. G,,•• MAIM 406 '�f 7-it, � Signatur € Designer 41 - 2' X0 zo Seal Date DRAINAGE AREAS 1 Is this a high densif roject? Yes 2 If so, number of drainage areas/SCMs 1 3 Is all/part of this project subject to previous rule versions? I No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM Sand filter Sand filter 5 Total BUA in project (sq ft 51624 sf 51264 sf 6 New BUA on subdivided lots (subject to permitting) (sq ft 51624 sf 51624 sf 7 New BUA outside of subdivided lots (subject to permi in (s : sf sf 8 iOffsite - total area (sic ft) sf sf 9 Offsite BUA (sq.�)_ _ _ _ Breakdown of new BUA outside subdivided lots: sf sf 10 Parking (sq ft 31893 sf 31893 sf Sidewalk (sq ft) 2210 sf 2210 sf Roof (sq ft 15876 sf 15876 sf Roadway s ft sf sf Future (sq ft sf sf Other, please specify in the comment box below (sq ft 1645 sf 1645 sf 11 New infiltrating permeable pavement on subdivided lots (sq ft sf sf 12 New infiltrating permeable pavement outside of subdivided lots (sq ft sf sf 13 Exisitng BUA that will remain (not subject to ermittinq) (sq ft sf sf 14 Existing BUA that is already permitted (Sq ft). sf sf 15 Existing BUA that will be removed (sq ft sf sf 16 Percent BUA 32% 32% 17 Design storm inches 1 in 1 in 18 Design volume of SCM cu ft 3214 cf 3214 cf 19 Calculation method for design volume 1 Simple Method Simple Method ADDITIONAL INFORMATION 20 Please use this space to provide any additional information about the drainage areas : 1,645 sf BMP stone access road RAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM N/A 5 _ _ Total BUA from project (sq ft) 51624 sf r6 1995 rules SL 2006-248 2008 rules 2017 rules 7 New BUA on subdivided lots (subject to permitting) (sq ft) 51624 sf _ 1995 rules SL 2006-246 _ 2008.rules 2017 ruler. $ New BUA outside of subdivided lots (subject to permitting) (sf) sf 1995 rules _ _ SL 2006-246 2006 rules. 2017 rules 9 Offs ite - total area.(sq ft) F _ 1995 rules sf _ SL 2006-246 2008 rules 2017 rules !T 10 kOffsite BUA (sq ft) sf 1995 rules SL 2006-246 2008 rules 2017 rules 11 Design storm (inches) 1 in 1995 rules SL 2006-246 2008 rules 2017 rules 12 Breakdown of new BUA: Parking (sq ft 31893 sf Sidewalk (sq ft 2210 sf _ _ Roofs ft 15876 sf Roadway (s ft sf Future (sq ft) sf Other, please specify in the comment box below (sq ft 1645 sf 13 New infiltrating permeable pavement on subdivided lots (sq ft sf 14 New infiltrating permeable pavement outside of subdivided lots isq ft sf 15permitting) Exisitng BUA that will remain (not subject to s ft sf 16 Existing BUA that is already permitted (sq ft) sf 17 Existing BUA that will be removed (sq ft sf 18 Percent BUA 32% 19 Design volume of SCM cu ft 3214 cf 20 1 Calculation method for design volume Simple Method ADDITIONAL INFORMATION FPlease use this space to provide any additional information about the drainage area(s): 1,645 sf BMP stone access road SAND FILTER 1 Drafnage area number esign volume of SCM (cu'ft) 1 2 L 3214 sf 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 9 What is the method for dewatering the SCM for maintenance? Drawdown Orifice 10 lif 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 somply with General MDC (9)? Yes 13 If the SCM is on a single family lot, does (will?) the plat comply with General MDC (10)? Yes Yes Yes 14 Is there an O&M Agreement that complies with General MDC (11)? 15 Is there an O&M Plan that complies with General MDC (12)? SCMfollow the device specific MDC? as the SCM designed by an NC licensed professional? Yes WArJn161Doesthe Yes F:II TFR Mnr FRAM n2H 1nsA 18 SHWT elevation (fmsl) 806.5 19 Type of sand filter (open or closed) Open 20 If closed, will the filter will be pre -cast or pour -in -place? 21 If closed, top of grate elevation (fmsl) Is this sand filter designed to attenuate peak flows? 22 Yes I tndimnnt rhnmh.r 23 Volume that can be retained in the sediment chamber (cubic feet) 2195 of 24 Will there be a permanent pool in the sediment chamber? No 25 Bottom of the sediment chamber (fmsl) 811.50 26 Area of the sediment chamber (square feet) 365 sf 27 Physical depth of the sediment chamber (inches) 24 in 28 Ponding depth in the sediment chamber, above any permanent pool (inches) 24 in 29 Elevation of top of weir between chambers (fmsl) 813.5 �Sond Chomber 30 lVolume that can be retained in the sand chamber (cubic feet) 8253 cf 31 1 Bottom of the sand chamber (fmsl) 809.50 32 jArea of the sand chamber (square feet) 725 sf 33 Physical depth of the sand chamber (inches) 18 in 34 Ponding depth in the sand chamber, above any permanent pool (inches) 48 in 35 Elevation of the bypass device (fmsl) 813 36 Type of bypass device Box 37 Mechanism for distributing flow over the sand surface Rip rap 38 Sand specification for sand chamber ASTM C33 39 1 Depth above underdrain pipe (inches) 18 in 40 Will the media be maintained to drain at least two inches per hour at the sand surface? Yes 41 Is at least one clean -out pipe provided at the low point of each underdrain line? Yes 42 Will clean -out pipes be capped? Yes ADDITIONAL INFORMATION Please use this space to provide any additional information about the 43 Sand Filter(s): Sand Filter 1