TYPICAL BIORETENTION SWALE

GRAPHIC SCALE

20

1" = 20 FEET

10 40

TYPICAL FILTER VAULT

EXISTINGPROPERTY/RIGHT-OF-WAY LINE

EXISTING EDGE OFPAVEMENT

EXISTING ROADCROWN

EXISTINGGRADE

2'5' 4.5'

2H:1V ORFLATTER MATCH

EXISTING

1.8'

PROPOSEDGRADE

1'

0.5' (MIN)

VARIES (APPROXIMATELY 14.5')

BOTTOM OF BIORETENTIONSWALE (LONGITUDINAL

SLOPE = 4.2%)

MAXIMUMPONDING

ELEVATION

SLOPE VARIES(2.0% MIN,

3H:1V MAX)

VARIES (1.2'±)

VARIES PER PLAN

1 SCALE: HORIZ: 1"=4', VERT: 1"=1'BIORETENTION SWALE SECTION

1

3

1

3

0.67' (MIN)

WASHED ROCK (34"-11

2")6"Ø PERFORATED PVCSDR35 UNDERDRAIN

BIORETENTION SOIL MIX (BSM)

0.50' (MIN)

COARSE COMPOST BELOWMAXIMUM PONDING ELEVATION

MULCH ABOVE MAXIMUMPONDING ELEVATION

EXISTINGASPHALTROAD

1'

1.5'

0.25'

2 SCALE: HORIZ: 1"=4', VERT: 1"=1'FILTER VAULT SECTION

EXISTING EDGE OFPAVEMENT

EXISTING ROADCROWN

EXISTINGPROPERTY/RIGHT-OF-WAY LINE

EXISTINGASPHALTROAD

2H:1V ORFLATTER

MATCHEXISTING

SLOPE VARIES(2.0% MIN,

3H:1V MAX)

12"ØSTORMDRAIN

6"Ø UNDERDRAINFROM BIORETENTIONCELL

FILTER VAULT - 8'x11' PEAKDIVERSION STORMFILTER

VAULT WITH 15 CARTRIDGESOR APPROVED EQUIVALENT

4'

EXISTINGGRADE

PROPOSEDGRADE

9'1'±

VARIES (14'±)

SITE #1

SOUTH BAY R

OAD RD N

E

PLEASANT GLADE RD

SITE LOCATION KEY MAPSITE LOCATION KEY MAP

SITES #2 & #3LIBBY RD NE SOUTH

OF 46TH AVENUE NE

SITE #1SOUTH BAY RD NE &

PLEASANT GLADE RD

SITE #446TH AVE NE & LEMON RD NE

SITE #5LEMON RD NE