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Home My WebLink About20200632 Ver 1_Merrimont-SuppEZ-2018_20200519ID#* 20200632 Version* 1 Select Reviewer:* Katie Merritt Initial Review Completed Date 05/19/2020 Mitigation Project Submittal - 5/19/2020 Is this a Prospectus, Technical Proposal or a New Site?* r Yes r No Type of Mitigation Project:* r" Stream r- Wetlands r` Buffer V Nutrient Offset (Select all that apply) Project Contact Information Company/Owner:* McAdams Contact Name:* Rebecca Stubbs Project Information Project Type: r DMS r Mitigation Bank Project Name: 2020-0632 County: Wilson Document Information Email Address:* rstubbs@mcadamsco.com Mitigation Document Type:* Mitigation Plans File Upload: Merrimont-SuppEZ-2018.pdf 504.69KB Rease upload only one RDF of the corrplete file that needs to be subrritted... Signature Print Name:* Rebecca Stubbs Signature:* �urr�>em�ev t -r-e. t-puvam rKur- FORMS LOADED ROJECT INFORMATION 1 Project Name a rm. Mefrimont Park 23.8 --- - - - --- -- --- 2 Project Area ac 3 Coastal Wetland Area ac 4 Surface Water Area ac 5 Is this project High or Low Density? High 6 Does this project use an off -site SCM? No 02H . 8 JVVill the vegetated setback remain 9 Als SUA other that as listed in.100<10Is streambank stabilization propos UMBER AND TYPE OF SCMs: 11 Infiltration System 0 12 Bioretention Cell 0 13 Wet Pond _ 7 14 SWrrnwatr--r Wetland 0 15 Permeable Pavement 0 16 Sand Filter 0 17 Rainwater Harvesti R 0 18 Green Roof fl _ 19 Level Spreader -Filter ShJ LS-FS 0 20 Disconnected Im rvious Surface f31S 0 _ .. __... -- 21 Treatment Swale 0 22 Dry Porte# 0 23 StormFiller 24 Silva Cell Q 25 Bayfilter 26 Filters 0 1 (feet) NIA getated? Yes I(c-d) out of the setback? - --- — Yes on this oroiect? No FORMS LOADED 27 I Name and Title: Original: P. Sokalski, PE; Modified: R. Stubbs, PE 28 O anization-, Originat Green Enriineerin% PL.LC, Mod-MNcAdams 29 Istreet address A±ICAdams: 2905 Meridian -Parkvra�r 30 City. State. Zin: - - Durham. North Carolina 27713 B34 Certification Statement I I:ertify, 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 andother supporting information are consistent with the information provided here. uesrgner 111i! \\ C ES /9 49073 LCCAS I"111111111\\ FOV VhOotiked s a ' CM Signature of Designe 4 - I � .2-02-0 Date DRAINAGE AREAS 1 Is this a high density project?Yes 2 If so, number of drainage areas/SCMs 1 3 Is all/part of this project subject to previous rule versions?Yes CLICK TO LOAD FORM Entire Site 1 4 Type of SCM Wet Detention Pond Wet Detention Pond 5 Total BUA in project (sq ft)378660 sf 378660 sf 6 New BUA on subdivided lots (subject to permitting) (sq ft)0 0 7 New BUA outside of subdivided lots (subject to permitting) (sf)0 0 8 Offsite - total area (sq ft)0 0 9 Offsite BUA (sq ft)0 0 10 Breakdown of new BUA outside subdivided lots: - Parking (sq ft) - Sidewalk (sq ft) - Roof (sq ft)1430 sf 1430 sf - Roadway (sq ft)377230 sf 377230 sf - Future (sq ft) - Other, please specify in the comment box below (sq ft) 11 New infiltrating permeable pavement on subdivided lots (sq ft) 12 New infiltrating permeable pavement outside of subdivided lots (sq ft) 13 Exisitng BUA that will remain (not subject to permitting) (sq ft)378660 sf 378660 sf 14 Existing BUA that is already permitted (sq ft)378660 sf 378660 sf 15 Existing BUA that will be removed (sq ft) 16 Percent BUA 37%37% 17 Design storm (inches)1 in 1 in 18 Design volume of SCM (cu ft)32719 cf 32719 cf 19 Calculation method for design volume WQV=P*RV*A/12 WQV=P*RV*A/12 20 DRAINAGE AREA INFORMATION ADDITIONAL INFORMATION The entirety of the drainage area is considered onsite. The 'roadway' BUA category includes driveway, parking, and sidewalk to coincide with the breakdown in the original design. Please use this space to provide any additional information about the drainage area(s): WET POND 1 Drainage area number 1 2 Design volume of SCM (cu ft)32719 cf 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?Pump (preferred) 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)? No 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 17 Was the SCM designed by an NC licensed professional?Yes 18 Method used SA/DA 19 Has a stage/storage table been provided in the calculations?Yes 20 Elevation of the excavated main pool depth (bottom of sediment removal) (fmsl) 118.00 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 119.00 22 Elevation of the bottom of the vegetated shelf (fmsl)122.50 23 Elevation of the permanent pool (fmsl)123.00 24 Elevation of the top of the vegetated shelf (fmsl)123.50 25 Elevation of the temporary pool (fmsl)124.50 26 Surface area of the main permanent pool (square feet)92691 sf 27 Volume of the main permanent pool (cubic feet)322189 cf 28 Average depth of the main pool (feet)3.48 ft 29 Average depth equation used Equation 2 30 If using equation 3, main pool perimeter (feet) 31 If using equation 3, width of submerged veg. shelf (feet) 32 Volume of the forebay (cubic feet)42518 cf 33 Is this 15-20% of the volume in the main pool?No 34 Clean-out depth for forebay (inches)12 in 35 Design volume of SCM (cu ft)32719 cf 36 Is the outlet an orifice or a weir?Orifice 37 If orifice, orifice diameter (inches)6 in 38 If weir, weir height (inches) 39 If weir, weir length (inches) 40 Drawdown time for the temporary pool (days)4.68 41 Are the inlet(s) and outlet located in a manner that avoids short- circuiting? Yes 42 Are berms or baffles provided to improve the flow path?No 43 Depth of forebay at entrance (inches)48 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)10 ft 47 Slope of vegetated shelf (H:V)10:1 48 Does the orifice drawdown from below the top surface of the permanent pool? Yes 49 Does the pond minimize impacts to the receiving channel from the 1- yr, 24-hr storm? Yes 50 Are fountains proposed? (If Y, please provide documentation that MDC(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 Tall Fescue 54 Has a planting plan been provided for the vegetated shelf?Yes 55 Please use this space to provide any additional information about the wet pond(s): WET POND MDC FROM 02H .1053 GENERAL MDC FROM 02H .1050 ADDITIONAL INFORMATION Wet Pond 3 5:55 PM 4/8/2020