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Home My WebLink AboutSW3210401_Supplement-EZ Form_20210608SUPPLEMENT-EZ COVER PAGE L�=)_r�4r 10 An r n iPROJECT INFORMATION 1 Project Name 2 Eroject Area Jac) 3 Coastal W etland Area 4 Surface Wate�Area_ Lac) 5 Is this project High or Low DensiV? 6 Does this project use an off -site SCM? Providence Commons -Caliber Collision .27.4473 0 High No )MPLIANCEWITH02H.11003t4l 7 Width clIvegatated.setbacks provided (feet) 50 ............ 8 Will the vegetated setback remain. NLagqtated? Yes 9 Is BUA other that as Rated in .1 00314Xc-d) out a the setback? Yes. 0 ii-s—treambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System Sioretention Call Wet Pond Stormwater Wetland Permeable Pavement -Send Fi Iter 0 12 .. . . . . .... ... ....... 0 0 0 0 0 13 14 15 16 17 [Rainw'ater Harvestl%�RWHJ lGreen Roof Level SpLeader-Filter Strip ILS-Fpl____.__. 18 19 20 IDisconnecled Imparvious Surface tDIS) Swale Dry Pond StormFilter Silva Cell pa yl)ter Filterra 21 ITreatment 0 0 23 0 0 24 25 0 6 26 CERTIFICATION 27 Name and Title: 28 Organization: 29 Str et address: 30 'rZ —Slate, Zil): 31 [phone numberw 32 1 Email: Marc Mornsen, P. LandiDe-slaq 223 North Graham Street Chart NC 28202 704-333-0325 mmomsenalanddesign.com -Certification Statement: I certify, under penalty of law that this Supplernent-EZ form and all supporting information were prepared under my direction or supervision; that the lryformaflon provided in the form is, to the best of my knovAedge and belief, true, accurate, and complete: and that the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent YAM the Intoffnation provided here. . � % I I I I I j , . . I seat jgnatu o4f wigneiv ct, S Date V DRAINAGE AREAS 1 Is this a -�; " Yes Pijl� �ensj r f��i If so.'number of drainage areas/SCMs Is all/part of this project subject to previous rule 3 versions? F 0 R MS L UADF11 DRAINAGE AREA INFORMATION Entlis - Site I 4 [Type of SCIV 7 374ii4if 5 Total BUA in project sf 6 New BUA on subdivided lots (subject to permitting) (sq ft) New BUA outside of subdivided lots (subject to permitting) M 1-3.60.094 ef NIA 360094sf 8 Offs1te -Jotal area (sq,ftJ 94419 af 9 Offsite BUA " ft) NIA 94419 sf 10 Breakdown of new BUA outside subdivided lots: 410664 - Parking 4sq ft) 41080 sf - Sidewalk.Csq fl) 1320 st iOi6O iif 1320 af 001 Roadway (sq Future 20860sf 14712 sf 14712sf 8�i 22 sf 282122sf Other, please specify in the comment box below Jsq ft� 11 New infiltrating permeable pavement on subdivided lots (sQ ftJ NIA Now Infiltrating permeable pavement outside of 12 :subdivided lots (sq ftJ NIA 14890sf 14890sf ExJsitng BUA that will remain (not subject to 13 �permitting) (sq ft) 14 ExistinjaB A that is already permitted (sq ft) 157 ng BUA that will be. removed J�qjL_ 323 sf 31% 3fi— Wf 80% 116 Percent BUA 77—Fes-Ig"n storm (inches) I in 19 qq!��Ign volume of SCM (cu ft) 53107cf Simple MethoJd Calculation method for te�!qn volume ADDITIONAL INFORMATION JPIea5e use this space to provide any additional information about the 20 drainage areais): WETPOND 1 Drainage area number 2 Design volume of §CM (cu ft) 3107 cf 3 Is the SCM sized to treat the SW from all surfaces at buird-out? *W ... .. ...... ........ ........ 4 f1hie SCM located awayfrom contaminated solls? yes 6 are the side slopes of the SCM (HV)? 3:1 Does the SdW_hiV_e —rataining walls. gablon walls or other eng:neered side slopes? No Are the Inlets, outlets, anj're 5 from erosion (IG-year storm)? Yes Is there an o�irhow or bypass for Inflow volume In excess of the design volume? No What Is the method for dewaterIng the SCM for maintenance? Pump (prefenrad) if applicable, will the SCM be cleaned out after construction? Yes Does the maintenance access com�fiwith-deinierall MDC (8)? Yes 7 8 9 10 11 12 Does the drainage easement comply with General MOC (9)? Yes 13 If the SCM is on a single family lot, does (will?) the plat comp?y with General MDC (10)? Is there an O&M Agreement that complies with General MDC (11 ? No 14 Yes Yes 15 re an O&M Plan that complies with General MDC (12)? 16IDoes. the SCM follow the device specific MDC? 17+W—ai the SCM designed by an NC ilcBnsed professional? WET PON D MU_p gO M 02H . 1 o53 18'Method used 19 Has a stageistorage table been providid In t1ii-c"ailculations? bevation of the ex'60-ated main pool depth (bottom of sed;rnent 20i removal) (fimsQ 21 Elevation of the main pool bottom -(top of sediment removal) (fmsi) 22 Elevation of the bottom of the vegetated shelf (fmsl) Yes SA/DA Yes 536.00 537.00 544.00 544.50 545.00 23 Elevation of the permanent pool (fmsll Elevation of the Lop!?�Ih a vegetated shelf (fmsi) Elevation of the temporary pool (fms4_ Surface area of the main permanent pool (square feet) Volume of the main permanent pool (cubic feet) 24 25 552.74 26 2� 13796sf ft' 28 Aieiii-ge depth of the main pool (feet) Average depth equation used If using equation 3, main pool perimeter (feet� if using equation 3, width of submerged vag. shelf (feet) 29. 30. 31; 12798 ef 32 Volume of the forebay (cubic feet) —this 33 Ts 15-20% of the volume In the main pool? Clean -out depth for forebay (inches) . . .... ......... Design volume of SCM ICU ft) 34 35 53107 cf Orifice 3.50 in 36 Fs -the 'o"utlet an orifice or a weir? 37 If orifice, orifice diameter (inches) 38 If weir, weir height (Inchao 39 If weir, weir length jinches) Drawdown time for the temporary pool (days) 40 2.15 yes No 114 in 41 Are the Inist(s) ;nd outlet located In a manner that avoids short- circulting? 42 ke berms or baffles provided to Improve 431Depth of forebay at entrance (inches) 1 Depth of foreWy at exit (Inchesi 44 102 In 45'Does 46 47 48! 49 water flow out of the forebay In a non -erosive manner? Yes 6ft & I Width of the vogetated shelf (feeg Slope of vegetated shelf (H:V) Does the orifice drawdown from below the top surface of the permanent pool? Does die pond minimize Impacts to the receiving channel fror;�_t�_8_1_ i yr. 24-hr storm? 'Ai� 16untains proposed? (tf Y. please prov'Id'ad-6-c—ument-ail o—ntfiat- MDC(9) Is met.) Is a trash rack or other device provided to protect the outlet system? t Yes Yes 50 No yes Yes 51 52 jAre the dam and embankment planted in non-clumpirp turf grass? Species of turf that will be used on the dam and embankment 531 FACW Meadow Mix _. _ . ..T Iii 541 _. Hasa planting plan been provided for the vegeta;ted shelf7 t AODITIONAL INFORMATION I Please use this space to provide any additional Information about the Wet Pond a 20:22 AM 5/28/2021