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madse C INSTALL TEMPORARY YPASS DAM S
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ACCESS FROM THIS
PROVIDE SECOND DAM A
___ EEDEp IF
TO AND PUMP
•, L----- — --
..\--------___COLLECT SECONDARY FLOW
. ••. --____ A
•'� —LOG DROPS
PASS PIPE -K
"CMP IE=121.
UTILITY EASEMENT
See Note
UTILITY EASEMENT FROM NEW LIFE CHURCH 8/10/09
KING CO. RECORDING # 20091007000046
RECOMMENDED
FOR APPROVAL
BY Daniel Carey 6/30/10
BY
20 2H:1 V
16
BOTTOM OF BASIN
APPX. EL 113
\ t
0' 2 0'
O
FF— Cn(� SCALE 1 "= 20 Feet =
DE D =
0
x CONSTRUCTION NOTES
1. PIPE INVERT ELEVATIONS TAKEN FROM PRELIMINARY SITE
PLAN, NEW LIFE CHURCH, WEST SIDE IMPROVEMENTS.
2. SEDIMENT LIMITS AND BASIN BOTTOM ELEVATIONS ARE
APPROX. THE CITY MAY ADJUST THE SEDIMENT REMOVAL LIMITS
AND DEPTHS AS NEEDED.
REMOVE SEDIMENT TO BASE GRADES SHOWN 3. TEMPORARY BYPASS DAM SHALL BE WATER TIGHT SO BASIN
OR TO TOP OF RIP —RAP ON SIDE SLOPES. CAN BE DRAINED AND SEDIMENT CAN BE DRIED OUT.
HAND DIG IF NEEDED TO IDENTIFY RIP —RAP.
DO NOT OVEREXCAVATE SIDESLOPES. 4. FISH RESCUE IN THE SEDIMENT BASIN SHALL OCCUR
USE SMOOTH BUCKET, NO TEETH. IMMEDIATELY AFTER THE BYPASS DAM IS INSTALLED.
\ . \ ' SEDIMENT LIMITS APPROXIMATE.
ACCESS B,gSIN
DOWN TSI \� -'� i SEDIMENT DEPTH APPROX 4 TO 6 FEET.
( I
ICE
\ LY
Li
24"CMP BYPASS PIPE
LOCATION NOT VERIFIED,"",, 2 P
` \ ' I
120
A \ �'°'�
uj
m D
, / X
HYDR EED A D STRAW MULCH \0q�`�
ISTUR D SL E AND ACCESS ROAD
AIT B IN CL NING
12'x3' CONC. BOX CULVERT
24"CMP BY ASS PIPE `
LOCATION OOT VERIFIED
l
BYPASS PIPE OUTLET
24" CMP
IE=116.12
OVERFLOW SPILLW Y
IE=117.86
UTILITY EASEMENT
,x NO See Note
ACCESS
FROM T I S S
IDE
36" CMP INLET
' IE=115.81
('V
X.
... ... GRA
.......- DEL q00 '-- -
\- ` \ oVERF _-_ ESS �oW C RO aN ' - AD
36" CMP OU'RLET \�� EL (d,y) _
IE=114.47 �\ �� OVERFLOW SPILLWAY
IE =116.8 est
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-
\n \30 r .. co � S `
CD ,Q
O
SEDIMENT BASIN CLEANING DRAWING
OM SR— 9
AS -BUILT NOTES
1. 2009 — POND BOTTOM WAS WET AND MUCKY.
EXCAVATOR STAYED ON PAD OF SEDIMENT AND REMOVED MATERIAL TO APPX. EL 113
BY JUDGING THE DEPTH SHOVEL WENT DOWN. APPROX 1000 CY REMOVED.
BOTTOM WAS TOO MUCKY TO WALK ON AND SURVEY AFTER WORK WAS FINISHED.
2. 2010 — POND CLEANED TO APPX EL 113.
BOTTOM WET, MUCKY DUE TO WATER GETTING PAST DAM OR GROUNDWATER.
D-349105
SURVEYED: SCALE:
VERTICAL: NAVD 1988
DESIGNED:
AS NOTED HORIZONTAL: NAD 1983/1991 41 _ CITY OF
%'�
DRAWN: °° ML F ENTON
DC ONE INCH DATU M
CHECKED: AT FULL SCALE Planning/Building/Public Works Dept.
DC / RS IF NOT ONE INCH
NO. REVISION BY DATE AP P R APPROVED: IRSSCALE ACCORDINGLY
2011 Cleaning
6/30/11
MADSEN CREEK SEDIMENT BASIN FIELDBOOK:
PAGE:
CLEANING PROJECT DRAWING N0:
SEDIMENT BASIN 1
SHEET: OF:
x 2
U-13 419171 1