SW3170404_Supplement EZ_20170417

4 SUPPLEMENT-EZ FORM COVER PAGE C,»trono;r
gelato,
Please indicate the types,quantities and locations of SCMs that will be used on this project
Quantity Location(s)
Infiltration System '' °'�'' ','.`,,•,' "'� Project Name:
Bioretention Cell 's, ''''', "„', ,, �'',;
' TLaureiwood Subdivision
Wet Pond 1', , .•Back`of,F,roperty�between,the two`roads,', ,t,' , _ '
Stormwater Wetland
Permeable Pavement °' , �,;' '"' - � , '' � n � Address
Sand Filter
v , " ' "`
i � NatalieCormon Driv
• e-
Rainwater Harvesting , ��'.
Green Roof 's' '-','.",.;',::-,'"., ,,I,� �
, , ''` '" +''
Level Spreader-Filter Strip
� �•�,°"
Disconnected Impervious Surface ,,'',:',,,,,',","4,"; .',' , ' ,��b City/Town
Treatment Swale '�,.1 ' ,.,..-',,,i, ',''','" ,` , ,,`.0 ,,i,, •
�,, Denver,(Lincolni County)''
Dry Pond , ", . . .
Designer information for this project: Applicant:
Name and Title' Jeff:McCluskey;'PE-''president, �' )'- `" ''I Company- 'Shinnv)lle,RidgeParmers,''LLC„` "”, ; ,
°Organization Mc2 Engineering,'Inc: ,r-' 9', `i Contact: Chad"Cooke) ,''`,, , ,
Street address 2'11'0 Ben Craig,Drive;Suite 400 ,, Mailing Address: 206072:Bethel Church„'Roads ,�, , ,
City, State,Zip. Charlotte,,NC',28262�, , ':1,-, „ ,''i City,State,Zip. Corneliu"S;NG,28031.. `
!Phone number(s). 7,04-51,0=9797 ,1 4, i Phone number(s)• 704-778=8994` . " • ' . ,��'
Email: Jeff @mc2eng:;com', o , ,,, I Email. [e-mail]:,, , ,,, „, ,„ r, n',' ,
Designer
��,poo""""poQ®��� Certification Statement:
,090 ��� CAR °�o I certify, under penalty of law that this Supplement-EZ form and all supporting
®�® ®••••••••Q`� 4,�d information were prepared under my direction or supervision,
.e.��.••• ES$/.•••,/ o+ -that the information provided in the form is,to the best of my knowledge
Q4O �/ji�;9 Ali,
•,Iii-
.
► and belief,true, accurate, and complete;and
SEAL r: �
29 6 Signatur= of I'Ligner -that the engineering plans,specifications,operation and maintenance
agreements and other supporting information are consistent with
y .0,•..4`A, :(� b the information provided here
. I am aware that there are significant
�,,o`i t.b. MCC'��,`4,® 41 111 information including the possibility of finest and imprisonment es for ltforing eknowing
11i.aP Date violations as well as a report being made to my professional board.
Cover Page 1 12.14 PM 4/11/2017

INET POND Laurelwood Subdivision
-sTHE DRAINAGE AREA
Drainage area number 1' ' ,, i Break down of BUA in the drainage area(both new and existing):
Total coastal wetlands area(sq ft) sf -Parking/driveway(sq ft) ' , 35500 sf
Total surface water area(sq ft) sf . -Sidewalk(sq ft) sf
Total drainage area(sq ft) ° 771683 sf -Roof(sq ft) '284000 sfµ~
;BUA associated with existing development(sq ft) sf -Roadway(sq ft) 90782sf
Proposed new BUA(sq ft) 424983 sf -Other,please specify In the comment box below(sq ft) 14701 at'
Percent BUA of drainage area 55% , , Total BUA(sq ft) 424983 sf '
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Stormwater program(s)that apply(please specify) Design rainfall depth(in) 1 0 in '
=Phase II Urbanizing Area • Minimum volume required(cu ft) 22199 cf
, Design volume of SCM(cu ft) 22199 cf '
GENERAL MDC FROM 02H.1050
#1 Is the SCM sized to treat the SW from all surfaces at build-out? Yes #7 If applicable,with the SCM be cleaned out after construction? Yes
#2 Is the SCM located on or near contaminated soils? No #8 Does the mainetenance access comply with General MDC(8)? Yes ,
#3 What are the side slopes of the SCM(H V)? 3 1 ,#9 Does the drainage easement comply with General MDC(9)? Yes
#3 Does the SCM have retaining walls,gabion walls or other engineered side slopes? No '#10 If the SCM is on a single family lot,does the plat comply with General MDC(10)9
#4 Are the inlets,outlets,and receiving stream protected from erosion(10-year storm)? ' Yes #11 Is there an O&M Agreement that complies with General MDC(11)? Yes
#5 Is there a a bypass for flows in excess of the design flow? No #12 Is there an O&M Plan that complies with General MDC(12)? Yes �^
#6 What is the method for dewatering the SCM for maintenance? Pump(preferred) #13 Was the SCM designed try an NC licensed professional? Yes
WET POND MDC FROM 02i-1.1053
#1 Method used ...... SNDA.,, #6 Width of the vegetated
shelff __..,..,.,.. .. .....
s (feett) 6 ft I
I#1 Surface area of the main permanent pool(square feet) 6736 sf #6 Location of vegetated shelf "Submerged
#1 Volume of the main permanent pool(cubic feet) 22199 cf #6 Elevation of top of shelf(fmsl) r 795 ft
#2 Average depth of the main pool(feet) 3 ft #6 Elevation of bottom of shelf(fmsl) 794 ft ,
'#2 Was the vegetated shelf included in the calculation of average depth? Yes #6 Slope of vegetated shelf(H V) 6 1
'#2 Elevation of the bottom of the permanent pool(1mel) 789 ft- #7 Diameter of drawdown orifice(inches) 2 0 in '
#2 Elevation of the top of the permanent pool(fmsp 7945 ft #7 Drawdown time for the temporary pool(hours) '50 hrs'
#2 Elevation of the top of the temporary pool(fmsl) ,794 67,ft LL ' #7 Does the orifice drawdown from below the top surface of the permanent pool? Yes
i#3 Depth provided for sediment storage(inches) 6 in #8 Does the pond minimize impacts to the receiving channel from the 1-yr,24-hr storm? Yes
#4 Are the inlet(s)and outlet located in a manner that avoids short-circuiting? Yes "#9 Are fountains proposed? No
#4 Describe any measures,such as berms or baffles,that will be taken to improve the flow path #9 If yes,is documentation provided per Wet Pond MDC(9)? ,
#10 Is a trash rack or other device provided to protect the outlet system? Yes
•5 Volume of the forebay(cubic feet) 3481 • #11 Are the dam and embankment planted in non-clumping turf grass? Yes
#5 Is this 15-20%of the volume in the main pool? Yes #11 Species of turf that will be used on the dam and embankment Fescue
#5 Depth of forebay at entrance(inches) 36 in `#11 Describe the planting plan for the vegetated shelf
#5 Depth of forebay at exit(inches) 30 in Stormwater SCM Detail Wet Pond#1(C4.1)calls out the specific wetland plants,gives the locations and also gives
,spacing recommendations for the proposed plants
i#5 Does water flow out of the forebay in a non-erosive manner? Yes
#5 Clean-out depth for forebay(inches) 30 m ,
#5 Will the forebay be cleaned out when the depth is reduced to less than the above? Yes ��
ADDITIONAL INFORMATION
Please use this space to provide any additional information about this wet pond that you think is relevant to the review
-Other Impervious=off-site(Natalie Commons Drive),6,201 sf,Sanitary Sewer Pump Station Pad 2,500 sf and Common Open Space improvements 6,000 sf for a total of 14,701 sf `
Wet Pond 1 12 14 PM 4/11/2017