HomeMy WebLinkAboutBLD1999-00708 STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN
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Figure III-3.17 Roof Downspout System
z 7/1--0 CB
Trench) �Rooy/ �"-'Trench
I
Possible Alignments Roof drain
PLAN VIEW
Not to Scale
Roof
_ —/Observation Well / 6" Perforated Pipe
I ��ss
1 I \� i
i
— z-- —— ———— -- Sump w/
`-� Infiltration Trench solid lid
Roof Drain
PROFILE VIEW
nts
Observation Well Overflow
Splash block
--► A Sheet Cover Material r
1' min.t _ __ — . _—
L.wi / = 1' min.
�—�,,, 11/ T Fin j 1' min.
1' minim—� _ +r - mesh /r. -- i —
Level screen
--► A CB Sump with
6" Perforated Pipe Solid Lid
(CPEP single
' wall acceptable)
variesft-
I 10' min.
Observation Well
,7(w/metal cap & lock)
rilait., Compact Backfill
4"-6" PVC Pipe? ii 6-wt.
(perforated) /1 . - �. 6" Perforated Pipe 14" acceptable
p ,i `;!:• '�; for roof downspout systems)
Wrap Trench �, —Washed rock 3/." 11/2"
Entirely With \ .-• �tr ,
Filter Fabric
rill
=iii._ _ SECTION A-A
'�' '
I Not to Scale
2�
s1
111-3-48 rEBRUARY, 1992
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ORA -C/t-ID
3 6 d AM
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