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HomeMy WebLinkAboutSW6191003_Supplement-EZ Form_20191211SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION I 1 'Project Name Hobson Road Concrete Plant ( 2 Project Area (ac) 4.99 3 -Coastal Wetland Area (ac) 0 4 Surface Water Area (ac) 0 5 r Is this project High or Low Density? High 6 'Does this project use an off -site SCM? No jCOMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided (feet) n/a 8 Will the vegetated setback remain vegetated? ,._ 9 i Is BUA other that as listed in .1003(4)(c-d) out of the setback? 10 ' Is streambank stabilization proposed on this project? NUMBER AND TYPE OF SCMs: --- —-—I 11 Infiltration System _ _ 0 12 Bioretention Cell _ S _ 0_-_ 13 !Wet Pond 1 14 Stormwater Wetland 0 15 Permeable Pavement 0 16 ;Sand Filter 0 17 Rainwater Harvesting (RWH) 0 18 'Green Roof 0 19 Level Spreader -Filter Strip (LS-FS) _ _ 0 , a 20 'Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 :Dry Pond _ 0 '? 23 'StormFilter 0 ` 24 Silva Cell 0 25 Bayfilter_ _ 0 i 26 Filterra 0 I FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title _ _ _ C. Scott Brown, PE 128 !Organization: 4D Site Solutions,. Inc. 29 Street address: 409 Chicago Drive, Suite 112 30 City, State, Zip. Fayetteville, NC 28306 31 ;Phone number(s): _ 910 426-6777 E 32 (Email sbrown@4dsitesolutions.com 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. %%,��P�r1 CAF?o �o Fio .0Ess'-- SEAL = 027452 = GINS / � � C,OTT By� �eU,1 1 1 % 1'' Signature of DT si IZ-Ir I Date DRAINAGE AREAS 1 a Is this a high density protect? Yes 2 1 If so number of drainage areas/SCMs 1 rIs all/part of this project subject to previous rule 3 ,versions? No FORMS LOADED AREA INFORMATION 5 Total BUA in proiect (sq ft) _ ___ �. -.__981 . 02_sf _ 98102 sf New BUA on subdivided lots (subject to ? 6 'permitting(sgft) _ _._ _ n/a -- n/a _.. _ New BUA outside of subdivided lots (subject to 7 ;permittin 98102 sf _- 98102 sf -.- 8 _Offsite ,total area (sgft) _ sf -_ . - _ .- . sf 9 ; Offsite BUA (sq ft) _. _ sf. _ --__sf 10 Breakdown of new BUA outside subdivided lots. �.. Parking (sq ft) 96977 sf 96977 sf Sidewalk (sq ft) 225 sf. £ - 225 sf Roof (sq ft) . __- . 900 sf 900 sf Roadway (sq ft)_ . _ sf sf... r i... Future_(sq ft)__...__. Other, please specify in the comment box sf sf New infiltrating permeable pavement on 11 subdivided lots (sq ft) _ sf __ sf I New infiltrating permeable pavement outside of t 12 ,subdivided lots (�1ft')." sf ' sf ..-.._ _. Exisitng BUA that will remain (not subject to 13 permitting) (sq ft) ._ 4 sf _sf 14 aExisting BUA that is already permitted (sq ft) R sf sf 15 Existing BUA that will be removed (sq ft) 1869 sf J 1869 sf 16 Percent BUA 530% 53% 17 ,Design storm (inches) 1 in 1 in 19 iCalculation method for desi n volume SA/DAtt�.] * S / A 18 ,Design volume of SCM (cu ft) 8130 CFcf PJDA ADDITIONAL INFORMATION Please use this space to provide any additional information abo 20 idrainage area(s):_ Please use this space to provide any additional 21 j information about the drainage area(s). WET POND 1 I Drainage area number 1 2 Design volume of SCM (cu ft) 8130 cf 3 iJs the SCM sized to treat the SW from all surfaces at build -out? Ye6 i 4 'Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H:V)? 3:1 i$4 Does the SCM have retaining walls, gabion walls or other engineered . 6 side slo es? No Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes Is there an overflow or bypass for inflow volume in excess of the _.. ... . ..... _. 8 design volume? Yes 9 What is the method for dewatering the SCM for maintenance? Pump (preferred) 101If 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 comply with General MDC (9)? Yes If the SCM is on a single family lot, does (will?) the plat comply with 13 General MDC (10)? _. 14:Is there an O&M Agreement that complies with General MDC (11)? Yes a 15' Is there an O&M Plan that complies with General MDC (12)? Yes 16. Does the SCM follow the device specific MDC? Yes 17{Was the SCM designed by an NC licensed professional? Yes 18'Method used SAIDA 19Has a stage/storage table been provided in the calculations? Yes Elevation of the excavated main pool depth (bottom of sediment 20'removal)(fmsl) _ 231.00 21; Elevation of the main pool bottom -(top of sediment removal) (fmsl) 232.00 22' Elevation of the bottom of the vegetated shelf (fmsl) 236.00 23Elevation of the permanent pool (fmsl) 236.50 24I Elevation of the top of the vegetated shelf (fmsl) 237.00 25 Elevation of the temporary pool (fmsl) 2FA0 26, Surface area of the main permanent pool (square feet) 6065:1 I 27 Volume of the main permanent pool (cubic feet) 18842 cf 28!Average depth of the main pool (feet) 3.14 ft E 291Average depth equation used Equation 2 k30 If using equation 3, main pool perimeter (feet) Oft ( 31 ! If using equation $, width of submerged veg. shelf (feet) Oft 321Volume of the forebay (cubic feet) 2852 cf i 331Is this 15-20% of the volume in the main pool? Yes I 341 Clean -out depth for forebay (inches) 12 in s y 35 Design volume of SCM (cu ft) 8136 cf z 36 Is the outlet an orifice or a weir? Orifice 371 If orifice, orifice diameter (inches) 1.5 in 36 If weir, weir height (inches) 39' If weir, weir length (inches) 40 Drawdown time -'for the temporary pool (days) 2.9 ;Are the inlet(s) and outlet located in a manner that avoids short- 41circuiting? Yes a42 `Are berms or baffles provided to improve the flow path? No 43 ' Depth of forebay at entrance (inches) 54 in 44: Depth of forebay at exit (inches) 48 in 45, Does water flow out of the forebay in a non -erosive manner? Yes 46 Width of the vegetated shelf (feet) 6 ft 47iSlope of vegetated shelf (H:V) 6:1 i Does the orifice drawdown from below the top surface of the 48?permanent pool? Yes ''Does the pond minimize impacts to the receiving channel from the 1- 49'yr, 24-hr storm? Yes ( sAre fountains proposed? (If Y, please provide documentation that 50MDC(9) is met) - No 51 Is a trash rack or other device provided to protect the outlet system? Yes 52 Are the dam and embankment planted in non -clumping turf grass? Yes 53 Species of turf that will be used on the dam and embankment Bermuda Grass I 54?Has a planting plan been provided for the vegetated shelf? Yes DDITIONAL INFORMATION Please use this space to provide any additional information about the 55 wet pond(s): Wet Pond 1 1:08 PM 12/11/2019