16-105483-SFO.Dft- 20.0fl. e0.0ft
GRAPHIC SCALE V=20'
Driveway sheet flow
dispersion per Figure C.2.4. D
2' wide transition zone,
5/8" crushed rock or 3/4"
washed rock
v;Al, ,- s
�,bv�s{Yv ch rM Q.1n.���e PVC lightline
Downspout 1
Drain Pipes_ 74-40'
Concrete
Driveway
19' x 31'
N
Min 2% Or
CfDss A —
Slope
5 I
.y W
10' +;
lagatatvd '
Flow Patlh t 1
I I i
t I
^• /_ 5' EL— i
Garage
N
STORM WATER
DRAINAGE It
SITE PLAN 1" = 20'
CB sump with solid lid
per Figure C.2.2.A
1
I j
11
I
Proposed Residence F.F.
EL.501.60' '
W W ! •�i I
fm1
' b1N
I
- I I
Hammered
v o Easement
o ,
91/8�'/II '�31VC
Z 1U f dc. '. A !
Rlfiuoj .;;,jbuis Mcorj :13j omz�
l 990 I -9 t #-11 Vv -�<
:s
N
Covered j 10 If
Outdoor �.
I l
Living s• I �;
I I I
m r
v I II•
t�
5' BSBL
SOIL LOGS
DATED 05-20-2007 PER BURTON
STATON
SL-1 LOT 1
$L-2 LOT 2
$L-3 LOT 3
0 - 28" Brown Sandy Loam
0 - 5" Brown Sandy Loam
0 - 5" Brown sandy Loam
28"- 33" Brown Loamy Medium Sand
5"- 30" Brown Loamy Medium Sand
5"-40" Brown Semi -Compacted Loamy
33"-46" Grey Loamy Medium Sand
30"-44" Grey Semi -Compacted Gravelly
Fine Sand
Loamy Medium Sand
40"-45" Grey Gravelly Sand
Infiltration Trench per
Figure C.2.2.A
sit�m u."
smom.onand
Roof Area: 2,140 Sq. Ft.
Soil Type: Medium Sand
Min. Lineal Ft. Required:64.20'
Install System Per Figure 5.1.1A
Trench bottom not to exceed 24" below
original grade to maintain 12" vertical
separation to impermeable layer.
APPROVED
CITY OF FEDERAL WAY
PUBLIC WORKS DEPARTMENT
BY IV
DATE
De*ned For:
yUrty Mumntyuk
vv
Site Address:^
2224 S 3120 Street
Federal Way, WA
Parcel #: 0S37f]Q-0
WALKER SEPTIC DESIGN
Cell- n3.569.4998
Office- 253-333-2214
w aikc rs apt Icd ehg n@lg mp d.com
'0914 104"' Ave SE
Auburn, WA 98092
C.2.4 BASIC DISPERSION
FIGURE C.2.4.1) EXAMPLES OF BASIC DISPERSION FOR DRIVEWAYS
2-4„
-••-• 6�� MIN.
-J
BERM DETAIL
NTS
M M
A MI
}
j
LOCATE DRAIN
25' FROM R.O.W.
O
i
IF DRIVEWAY I
=
700 SQ. FT. MAX.
SLOPES
C7
BETWEEN BERMS
TOWARD STREET,
DRIVEWAY
SLOPE
^
r f
25'VEGETATED r 25
FLOWPATH
SEGMENT r I
DIAGONAL BERM WITH r
DISPERSION TRENCH
w
R
w f
Co
PLAN - DRIVEWAY DISPERSION TRENCH
DRIVEWAY SLOPE VARIES AND SLOPES TOWARD STREET
NTS
u_ w
❑ W
r I~ of
CD
+ c7
MIN 2% DRIVEWAY
CROSS, SLOPE
SLOPE I
26
' s�cFy
CRUSHED T9
ROCK STRIP
LOCATE DRAIN 25' FROM
' R.O.W. IF DRIVEWAY
SLOPES TOWARD STREETI
PLAN_ - SHEET FLOW DISPERSION FROM A DRIVEWAY
FLAT TO MODERATELY STOPING DRIVEWAYS
NTS
2016 Surface Water Design Manual — Appendix C 4/24/2016
C-69
C.2.2 FULL INFILTRATION
11 FIGURE C.2.2.A TYPICAL TRENCH INFILTRATION SYSTEM ::1
4" RIGID OR 6" CB SUMP w/SOLID LID ROOF DRAIN
FLEXIBLE i
PERFORATED
PIPE
INFILTRATION TRENCH
PLAN VIEW
NTS
0
6"
TRENCH SETBACK FROM ROOF DRAIN
BUILDING AS REQUIRED,
15' MIN.
OVERFLOW --
SPLASH BLOCK • I
4" RIGID OR 6" FLEXIBLE
PERFORATED PIPE
---------- I ------- ___--
' LEVEL-
12" WASHED ROCK 1 Z'-a'I
-- VARIES
FINE MESH
SECTION VIEW SCREEN
NTS
1 �-
24"
12"
MIN. 1' ABOVE SEASONAL
HIGH GROUNDWATER
TABLE, SEE SECTION C.2.22
MIN
I'MIN.
SETBACK
FROM
BUILDING
5' MIN.
CB SUMP WSOLID LID
�COMPACTED BACKFILL
F FILTER FABRIC
- — 24"
SECTION A
4" RIGID OR 6" FLEXIBLE
PERFORATED PIPE
1z' - & WASHED ROCK
2016 Surface Water Design Manual — Appendix C 4/24/2016
C-53