SW1221002_Supplement-EZ Form_20231208

DRAINAGE AREAS
1 Is this a high density project? Yes
2 If so, number of drainage areas/SCMs 3
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 2 3
Dry Detention Pond
4 Type of SCM 1 Swale 3 Swale 4
5 ,Total drainage area (sq ft) 1885521 243790 57250 46475
6 Onsite drainage area (sq ft) 1885521 243790 57250 46475
7 Offsite drainage area (sq ft) 0 0 0 0
8 Total BUA in project(sq ft) 1493266 sf 215541 sf 11900 sf 36850 sf
New BUA on subdivided lots (subject to permitting)
9 (sq ft) N/A N/A N/A N/A
New BUA not on subdivided lots(subject to
10 permitting)(sf) 15336 sf 33842 sf N/A 36850 sf
11 Offsite BUA(sq ft) N/A N/A N/A N/A
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft) - - - 33250 sf
-Sidewalk(sq ft) - - - -
-Roof(sq ft) 15336 sf 22463 sf - -
-Roadway(sq ft) - 1299 sf - -
-Future(sq ft) N/A - - -
-Other, please specify in the comment box below
(sq ft) - 10080 sf - 3600 sf
New infiltrating permeable pavement on subdivided
13 lots(sq ft) N/A N/A N/A N/A
New infiltrating permeable pavement not on
14 subdivided lots(sq ft) N/A N/A N/A N/A
Existing BUA that will remain(not subject to
15 permitting)(sq ft) 1339930 sf 181699 sf 11900 sf -
16 Existing BUA that is already permitted (sq ft) N/A N/A N/A N/A
17 Existing BUA that will be removed (sq ft) - - - 28075 sf
18 Percent BUA 28% 88% 21% 79%
19 Design storm (inches) 1.0 in 1.0 in 1.0 in
20 Design volume of SCM (cu ft) 19394 cf 84 cf 131 cf
21 Calculation method for design volume Simple Method Rational Rational
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
Dry detention pond 1: 10,080 sf of impervious area added on the airside of the
airport is routed to the dry detention pond. Swale 4: concrete surface between
retaining walls