SW1230602_Supplement-EZ Form_20230705 (2)

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
Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site 1
4 Type of SCM Wet Pond
5 Total drainage area(sq ft) 1436719.15 1357391.68
6 Onsite drainage area(sq ft) 1380078.63 1357391.68
7 Offsite drainage area(sq ft) 22686.95 0
8 Total BUA in project(sq ft) 400487 sf 400487 sf
New BUA on subdivided lots(subject to
9 permitting)(sq ft) sf sf
New BUA not on subdivided lots(subject to
10 permitting)(sf) 400487 sf 400487 sf
11 Offsite BUA(sq ft) sf sf
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft) 143200 sf 143200 sf
-Sidewalk(sq ft) 67344 sf 67344 sf
-Roof(sq ft) 28915 sf 28915 sf
-Roadway(sq ft) 39740 sf 39740 sf
-Future(sq ft) sf sf
-Other,please specify in the comment box
below(sq ft) 121288 sf 121288 sf
New infiltrating permeable pavement on
13 subdivided lots(sq ft) sf sf
New infiltrating permeable pavement not on
14 subdivided lots(sq ft) sf sf
Existing BUA that will remain(not subject to
15 permitting)(sq ft) sf sf
16 Existing BUA that is already permitted(sq ft) sf sf
17 Existing BUA that will be removed(sq ft) sf sf
18 Percent BUA 28% 30%
19 Design storm(inches) 1.0 in 1.0 in
20 Design volume of SCM(cu ft) 424045 cf 424045 cf
21 Calculation method for design volume SCS SCS
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
"Other impervious"is comprised of turf soccer fields which drain via an
underdrain system to the wet pond.A diversion ditch/swale will be used on
the western portion of the parcel to divert off-site runoff from the project site
and is included on the site plans.This ditch is not considered an SCM per
our cnnvArsatinn with Rrianna Hnlland 06/13/2023
See attached Stormwater Management Report for calculations.Design Volume(SCS)can be found
on page 21.Simple Method for the wet pond and forebay is found on pages 25 and 26.