SW6211101_Supplement-EZ Form_20211130

SUPPLEMENT-EZ COVER PAGE
LOAD SUPPLEMQj FORMS
1 Project Name
2 Project Area l
4 Surface Watar Area ac
5 le this ro'eci Hi h or tow Dens
g Does this project use an off -site SCM?
DANCE WITH 02H .1003 U4
Width of v elated setbacks provided feet
Will the ve elated setback remain ve etetec
Is BUA other that as listed in .1003 a 9-�) o
is streambank stabilization proposed on this
LOAD SUPPLEMENT FORMS
MASON RIDGE SUBDIVISION
1.49
Low
No
No
gerlification Statement:_
S certify, under penalty of law that this Supplement-E2 form and all supporting information were prepared under my direction or
supervision; that the plformation specifications, operationndin the form is, to the best of my knowledge and ma maintenance agreements and otherlef, true, accurate. and complete ; supportininformation are consistent
that the engineering plans,
with the information provided here.
[avarcrr.ar
oA CA ri �
=O¢Qnssrp
SEAL
17585
Seal
Signature 01 Designer
Date
//_ S • Z��

DRAINAGE AREAS
1 Is this a hi h densi ro'ect? No
2 If so, number of drains a areas/SCMs
Is all/part of this project subject to previous rule
3 versions? No
FORMS LOADEO
DRAINAGE AREA INFORMATION
Errtlrro
Swalea
. �
Type of SCM
5 To#al BUA in ro'ect s R
sf
New BUA on subdivided lots (subject to permitting)
6 ag ft
266000 sf
New BUA outside of subdivided lots (subject to
7
rmittln s
Offsite - total area (sq ft)
Offslie BUA
92300 sf
8
9
I
subdivided lots:
10
Breakdown of new BUA outside_
Parking (sq ft) -
i
- Sidewalks ft _
- Roof ft - ------ .
- Roadw ft....
Future soft _-_—.-
92300 sf
- Other, please specify in the comment box
below s ft
New infiltrating permeable pavement on
11
subdivided lots
New infiltrating permeable pavement outside of
12
subdivided lots sq it} .._-
Exisitng BUA that will remain (not subject to
13
rmitlin s ft
of
14
Existin BUA that is alread ermitted ft
15
Existin BUA that will be removed ft
16
Percent BUA
24�D
17
Desi n storm inches
18
Desi n volume of SCM eu ft
SCS
19
Calculation method for design volume
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
20 drainage area(s):
AGE AREA INFORMATION
rope of SCM
Total BUA from project (sq
1995 rules
SL 2006-246
2008 rules-
2017 rules
New BUA on subdivided lot
permitting) (sq ft)
--1995 rules
SL 2006-246
2008 rules
2017 rules
New BUA outside of subdh
pure Ibs
i
ft}
NIA
:s (subject to
tided lots (subject to

LOW DENSITY
DESIGN RE UIREM NTS FOR LOW DENSITY PROJECTS FROM 02H .100
1
Is project below density thresholds set forth in the applicable stormwater rule?
Does project maximize dispersed flow and minimize channelization of flow?
Has the use of piping been minimized per .1003(2)(c)?
Side slopes of the vegetated conveyances (H:V)
Maximum velocity in the vegetated conveyances during the 10-year storm?
Are curb outlet swales proposed?
Maximum longitudinal slope of curb outlet swale(s) (%)
Bottom width of curb outlet swale(s) (feet)
Maximum side slope of curb outlet swale(s) (H:V)
Minimum length of curb outlet swale(s) (feet) _ ..-........
Are treatment swaies used instead of curb outlet swales?
is stormwater released at the edge of the setback as dispersed flow?
Yes
Yes
Yes
4:1
NO
2
3
4
5
6
7
8
9
10
11
Yes
12
13
14
-ADDITIONAL
15
Have stormwater outlets been designed to prevent downslope erosion?
Are variations to rule .1003 proposed?
INFORMATION
Please use this space to provide any additional information about this low density project:
This project will have conveyance swales along the road and the flow will disperse on the lots. Culverst are proposed to cross the roads.
Two dnLp2nds are pressed to minimize the flow to downstream offsite culverts. (not needed fora low densi ro ect
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1
2
3
4
5
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7
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9
70
11
12
13
14
15
1$
17
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