HomeMy WebLinkAboutConceptual Drainage Plan Details002501- (min.) slope
trowel finish
access doors or removable panel
0
A .
i
frame, grate and
locking cover marked
drain (typ.)
average 1' sediment storage
(first cell)
SECTION B—B_
NTS
D TL 1.112, COMBINE
NTS
INLET
first cell sized for
25% to 35% of �
i
wetpool volume
.
3 min.
r
—E-
bottom slope 0.5-2%
toward inlet end
average sediment storage
1' min. (first cell)
DE T�NTION TAT UL T
random fill
filter fabric
" 6" perf pipe
18 min oav0v0 QoavD00
1/2 -1 washed rode
D
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v v ° D)
°p OO ° O° C'a D q OO ° O
00 °ov°O °oo DOv
---- 24" min
TRENCH X-SECTION
NTS
to road
drainage system
2' X 10'
level trench
w/perf pipe
PLAN' VIEW OF ROOF
NTS
DTL 3/2. PERFORATED STUB -OUT
NTS
Access cover or doors required.
See King County Road Standards for
1,7 specifications for manholes and ladders.
I 5' 10' grate over second cell
removable I (maybe provided by a grated
baffle 5' x 10' access door or paneof
s
1025' wetpod length
PLAN VIEW
CONCEPTUAL DRAINAGE PLAN DET.A..ILS
FOR SINGH PLAT
LOCATED IN THE N.W., 1/4, OF THE N. W. 1/4,
OF SECTION 5, TOWNSHIP 22 NORTH, RANGE 5 EAST, W.M.,
KING COUNTY, WASHINCTON
W
N TS
B
ventilation pipe (12" min.)
ladder
A
for vaults >1250 s.f. provide a
5' x 10' access door or removable
panel over lowest portion of vault
"r shaped
bottom
removable watertight
coupling or flange
2' min.
i
I V min. ur
paverr
6 min.
6'
;Max. 6 min.
plate welded to elbow
with orifice as specified elbow restrictor,see detail
07
pipe supports a
ELBOW RESTRICTOR DETAIL see Note 6
NTS 1.5xD
T min.
T outlet pipe
D
we notes 1 r>t
invert and elevation
per plans
1' section of pipe
attached by gasleled t
band to allow removal
restrictor plate
i
with orifice diameter as
/\ specified (not needed If
for spill control only)
ISOMETRIC
NTS
I ZO'I — I
w —
2' min. clearance
w —a to any portion of frop-T
0 a — including elbows
0 ladder —LO
i
00 — I OU TLET
1' WO design WS —
movable "-
! _
baffle o I NOTE: capacity of outlet
1 °-—_ pipe designed to peak flow
" 1 for WQ vaults 2'
p p g
0!= — for conveyance I '
for combined W.Q.
�. —; ± � angle as � F
°' detention vaults
r� and de necessary � L additional ladder rungs
2 min. see note 7 (in sets) to allow access
'- gravity drain (if grade allows) place elbow restrictor 2' min• to tanks or vaults when
es low as grade allows but must see detail catch is filled with water
be 6" min. above the base elevation
SECTION A —A of vault walls or above sediment
77storage area
NTS PLAN VIEW
bottom slope 0.5-2% towards outlet N TS
end of second cell (recommended)
secondary inlet
design W.S. o
handholds, steps or
ladder see KCRS
dwg. 2-006
2" min.
Inlet
Pipe
6
shear gate with control
_E T rod for cleanout/drain
N (rod bent as required
d for vertical alignment
'E— with cover) see KCRS
it ;12" dwg. 2-026
SECTION A —A
NTS
NOTES:
1. Use a minimum of a 54" diameter type 2
catch basin.
2. Outlet Capacity. 100-Year developed
peak flow.
3. Metal Parts: Corrosion resistant.
Non -Galvanized parts perferred.
Galvanized pipe parts to have asphalt
treatment 1.
4. Frame and ladder or steps offset so:
A. Cleanout gate is visible from top.
B. Climb -down space is clear of riser and
demout gate.
C. Frame is clear of curb.
5. If metal outlet pipe connects to cement
concrete pipe: outlet pipe to have smooth
O.D. equal to concrete pipe I.D. less 1/4"
6. Provide at least one 3" X .090 gage support bracket anchored to concrete wall.
(maximum 3'-0" vertical spacing)
7. Locate elbow restrictor(s) as necessary to provide minimum clearance as shown.
8. Locate additional ladder rungs in structures used as access to tanks or vaults to
allow access when catch basin is filled with water.
D TL 2/2. CONTROL STRUCTURE
NTS
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