The URL can be used to link to this page

Home My WebLink AboutSW6221006_Supplement-EZ Form_20230214SUPPLEMENT-EZ COVER PAGE 0 FORMS LOADED PROJECT INFORMATION 1 Project Name CCBCC-Fayetteville 2 Project Area (ac) 13.7 3 Coastal Wetland Area ac 0 4 Surface Water Area ac 0 5 Is this project High or Low Density? High 6 1 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? N/A 9 If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ? N/A 10 Is streambank stabilization proposed on this project? NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 Bioretention Cell 13 Wet Pond 14 Stormwater Wetland 15 Permeable Pavement 16 Sand Filter 17 _ Rainwater Harvesting RWH 18 Green Roof 19 Level Spreader -Filter Strip LS-FS 20 Disconnected Impervious Surface DIS 21 Treatment Swale 22 Dry Pond 23 StormFilter 24 Silva Cell 25 Bayfilter 26 Filterra 1 FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: 28 Or anization: Ethan Hart, P.E. - Civil Engineer Fitts and Goodwin, Inc. 29 Street address: 120 Corporate Blvd. 30 City, State, Zip: West Columbia, SC 29169 31 Phone number(s): 803) 331-2991 32 Email: ehart@strategisse.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. \��1111111 I I I f I////77j/ A R 0(/N9�,��i r � SEAS ET HAN11NP\\`�� Signature of De 'gner /IqZ3 Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 3 Does this project have low density areas? No 4 If so, number of low density drainage areas 0 5 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM Filterra 5 Total drainage area (sq ft 596772 45302 6 Onsite drainage area (sq ft 596772 45302 7 Offsite drainage area (sq ft 0 0 8 Total BUA in project (sq ft 325831 sf 42688 sf 9 New BUA on subdivided lots (subject to permitting) (sq ft 10permitting) New BUA not on subdivided lots (subject to s 31798 sf 11 Offsite BUA (sq ft 12 Breakdown of new BUA not on subdivided lots: - Parking (sq ft 31798 sf -Sidewalk (sft -Roof (s ft - Roadway s ft - Future (sq ft - Other, please specify in the comment box below (sq ft 13 New infiltrating permeable pavement on Isubdivided lots (sq ft 14 New infiltrating permeable pavement not on subdivided lots (sq ft 15permitting) Existing BUA that will remain (not subject to s ft 294033 sf 42688 sf 16 Existing BUA that is already permitted (sq ft 17 Existing BUA that will be removed (sq ft 18 Percent BUA 55% 94% 19 Design storm inches 1.0 in 20 Design volume of SCM cu ft 2814 cf 21 Calculation method for design volume Discrete ADDITIONAL INFORMATION 22 Please use this space to provide any additional information about the drainage area(s): Expansion to existing site results in a net increase of 0.73-ac (31,798-sf) impervious area. Runoff from an existing 1-ac parking lot draining to the site's existing basin is being treated by a Filterra bioretention SCM in lieu of modifications to the existing basin. FILTERRA BIORETENTION 1 Drainage area number 1 2 1 Minimum required treatment volume cu ft 2814 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)? 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? 7 Are the inlets, outlets, and receiving stream protected from erosion 10- ear 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? 10 If 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 13 If the SCM is on a single family lot, does (will?) the plat comply with General MDC 10 ? N/A 14 Is there an O&M Agreement that complies with General MDC (11)? Yes 15 Is there an O&M Plan that complies with General MDC (12)? Yes 16 Does the SCM follow the device specific MDC? Yes Was the SCM designed by an NC licensedprofessional? Yes BIORETENTION MDC FROM THE STORMWATER DESIGN MANUAL Type of pretreatment that will be used Rip Rap Dissipation 17 FILTERRA 18 19 Depth of storage above the filter media surface (in) 12 in 20 Surface area of the Filterra Bioretention system (sq ft) 182 sf 21 Method of flow distribution over the media Disperse 22 Infiltration rate of engineered media (inch/hour) 140 in/hr 23 Diameter of the underdrain pipes (if applicable) 6 in 24 Does the design include Internal Water Storage (IWS)? No 25 if so, elevation of the top of the IWS (fmsl) N/A 26 Elevation of the planting surface (fmsl) 94.5 27 Species of tree(s) that will be planted Eastern Redbud 28 Media depth (inches) 21 in 29 Number of clean out pipes 1 each 30 Will maintenance be performed per the Filterra Operations and Maintenance Manual? Yes ADDITIONAL INFORMATION 31 Please use this space to provide any additional information about the Filterra Unit(s):