HomeMy WebLinkAboutConceptual Drainage Plan Details008If
^^ A^ors or removable panel
0
0
+, L
W-0
3 3 A
_ono
frame, grate and
locking cover marked
drain (typ.)
Access cover or doors required.
See King County Road Standards for
specifications for manholes and ladders.
CONCEPTUAL DRAINAGE PLAN DETAILS
FOR SINGH PLA T
L 0 CA TED IN THE N. W. 114, OF THE N. W. 114,
OF SECTION 5, TOWNSHIP 22 NORTH, RANGE 5 EAST,
KING COUNTY, WASHINGTON
C
removable
baffle
E5�' x 10' grate over second
(may be provided by a gr
5' x 10' access door or panel
I
cel
ted
109' wetpool length -
PLAN VIEW
NTS
0
ventilation pipe (12" min.)
ladder A
A
for vaults ->1250 s.f. provide a
5' x 10' access door or removable
panel over lowest portion of vault
"V" shaped
bottom
removable watertight
coupling or flange
y" min. elevation per plans
pavement
1' min. under maxT
6' min.
6'
max. 6 min.
plate welded to elbow
with orifice as specified elbow restrictor,see detail
MLMM_
pipe supports
ELBOW RESTRICTOR DETAIL see Note 6 1
NTS
SOMETRIC
NTS
1.5 x D
min.
D outlet pipe
see notes 1 do
invert and elevation
per plans
1' section of pipe
attached by gosketed
bond to allow removal
restrictor plate
with orifice diameter as
specified (not needed if
for spill control only)
frame, grate & solid cover
marked DRAIN with locking bolts
see note 3 & KCRS
dwgs 2-022, 2-023
design W.S. C
2" min.
SECTION A— A
NTS
vertical bar
grate for
secondary inlet
handholds, steps or
ladder see KCRS
dwg. 2-006
Inlet
PlpO
shear gate with contra,
rod for cleonout/droin
(rod bent as required
for vertical alignment
with cover) see KCRS
dwg, 2-026
g
D ce)
N
Cn J
L
L ✓ w
NOTES:
Z
58 min. average 1 sediment storage 0 =
(first cell) w _ 2' min. clearance 1. Use a minimum of a 54" diameter type 2
_ to any portion of frop-T catch basin.
a including elbows \
o 9 2. Outlet Capacity. 100-Year developed W
5% (min.) slope ;n ladder OUTLET peak flow.
trowel finish SECTION B— B 1' WQ design WS _ a 3. Metal Parts: Corrosion resistant.
removable
NTS Nan -Galvanized parts perferred. V
baffle Galvanized pipe parts to have asphalt W p
INLET[-0, ba le o — treatment 1.
0 _ NOTE: capacity of outletCL
first cell sized for 1 1' for WQ vaults 2' — pipe designed to peak flow 4. Frame and ladder or steps offset so:Q) :::: w
25% to 35% of 3 � — for conveyance J
for combined W.Q. A. Cleonout gate is visible from top.
wetpool volume and detention vaults angle as
necessary additional ladder rungs B. Climb -down space is clear of riser and o
2 min. 7
see note (in sets) to allow access deanout gate.
3 min. — gravity drain (if grade allows) place elbow restrictor 2' min. to tanks or vaults when C. Frame is clear of curb. �i �1"
as low as grade allows but must see detail
" minv the base elevation catch is filled with water 5. If metal outlet pipe connects to cement
be 6 . above
of vault walls or above sediment concrete pipe: outlet pipe to have smooth
bottom slope 0.5-2% SECTION A —A r O.D. equal to concrete pipe I.D. less 1/4"
toward inlet end storage area O ►,., O
NTS PLAN VIEW 6. Provide at least one 3 X .090 gage support bracket anchored to concrete wall.
average sediment storage bottom slope 0.5-2% towards outlet (maximum 3' 0" vertical spacing) � V
g g end of second cell (recommended) NTS 7. Locate elbow restrictor(s) as necessary to provide minimum clearance as shown.
1 min. (first cell) O
8. Locate additional ladder rungs in structures used as access to tanks or vaults to
allow access when catch basin is filled with water. q
DTL112,COMBINED D.L'TTENTIONIWET VA UL T
NTS o
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DTL 2Z2. CONTROLSTRUCTULP.E
NT S Cn
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0
random fil
6' �j��j��j��j��j��j��j, filter fabric
V D ° 4" perf pipe
18" min U ° aoa°n 70c�_oV ° ° 1-1' /2'washed rock
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no o V nova,°
VQ o° o �n V on o
°o p°° °� °o [7
l• 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
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