HomeMy WebLinkAboutR-393007O FLOW CONTROL STRUCTURE C2 4
co EMERGENCY-\ 6 6'
6� C2.4 OVERFLOW BERM BERM
M 3 2 /D
_ TOP O_FBERM _=36.892% 5
EMBANKMENT COMPACTED 1� _ _ 3 - - - - - - - - - EMERGENCY OVERFLOW =35.89 - - - - - - - - - -
----------- --
' 95%. PERVIOUS MATERIALS - - - - �1 - - - TOP OF PRIMARY CONTROL STRUCTURE =35_69 - - - - - �h%C` MIN \ \
SUCH AS GRAVEL OR CLEAN TYP.
w SAND SHALL NOT BE USED. - - - - MINIMUM
- _�EXi-ST--NGfRE)UND _ SURFACE SEE NOTE 1 3 // r
- - - - - - - - - - - AREA 1,893 SF 3 0' 1� �`� EXISTING
- - - - - - - - - - - - GROUND
BOTTOM OF POND = 30.89
37.2'
ELEV = 30.89
20-MIL PVC POND LINER, 6"
J NOTE: BELOW POND SURFACE.
O INSTALL 6" OF SUITABLE SOIL
O 1. WIRE BACKED SILT FENCE, STAKED HAY BALES ON TOP OF THE LINER.
= WRAPPED WITH FILTER FABRIC, OR EQUIVALENT DEWATERING DEVICE 1
DIVIDER. LOCATION SHALL DIVIDE TEMPORARY (SEE RISER DETAIL) C2.4
U SEDIMENT POND INTO TWO APPROXIMATELY EQUAL
CELLS. DEWATERING ORIFICE 1
(SEE RISER DETAIL) C2.4
<:c A SEDIMENT POND - SECTION
A
Z NOT TO SCALE
w
6'
6'
w BERM BERM
J
TOP _OFBERM -36.89 2% �1
EMERGENCY OVERFLOW =35.89-------- -- yl I� '
O ' r�\ TOP OF PRIMARY CONTROL STRUCTURE = 35.69 MIN
%��' TYP.
3 5 EXISTING
EXISTING / \ �1 GROUND
GROUND \
BOTTOM OF POND = 30.89
20-MIL PVC POND LINER, 6"
BELOW POND SURFACE.
INSTALL 6" OF SUITABLE SOIL 1'
ON TOP OF THE LINER. 0
3
SEDIMENT POND - SECTION
B NOT TO SCALE
eEMERGENCY
6'
FLOW CONTROL STRUCTURE e
C2.4
6'
C2.4 OVERFLOW
BERM
3 2�//D
BERM
2°/y
1�
TOP OF_BERM _=_37.00
5
EMBANKMENT COMPACTED
_ _ - - -
- - -_EM_ER_GENCY_OV_ER_FL_OW_=_36.00_ - - - - -
TOP OF PRIMARY = 35.70
CLEAN
_CONTROL _STRUCTURE
MIN
SUCH AS GRAVEL OR
SAND SHALL NOT BE USED.
- - - - - - -
-
MINIMUM SURFACE AREA 458 SF / \
TYP.
EX-ST�-MC_
3 3
EXISTING
GROUND
BOTTOM OF POND
= 33.5
ELEV = 33.50
A
SEDIMENT POND - SECTION
20-MIL PVC POND LINER, 6" -
BELOW POND SURFACE.
INSTALL 6" OF SUITABLE SOIL
ON TOP OF THE LINER.
4'
J NOT TO SCALE
6'
BERM
?% TOP _OFBERM =37.00
1�r\rr ------------------EMERGENCY OVERFLOW =36.00---
r ------------- TOP OF PRIMARY CONTROL STRU�TURE `-- 35.70
SEE NOTE 1
\ EXISTING
GROUND /\\
20-MIL PVC POND LINER, 6"
BELOW POND SURFACE.
INSTALL 6" OF SUITABLE SOIL
ON TOP OF THE LINER. g 8'
SEDIMENT POND -SECTION
NOT TO SCALE
y OV TTASgt
AS-BUILT
I CERTIFY THAT THE INFORMATION SHOWN HEREON
WHICH WAS AS -BUILT BY AHBL , AND MAY INCLUDE NOTICE
LOCATIONS, ELEVATIONS, DEPTHS, PIPE SIZES, AND ALTERATION OF THE DDgMENTSHALL INVALIDATE TIE
PROFESSIONAL SEAL AND SIGNATURE PUBLICATION OFF!
AS -BUILT COMMENTS, ACCURATELY REFLECTS EXISTING THIS DOC(11ENTWESNOT DERDGATER MRESERVED 1.p 41803 w�
L:i ONLY pHE PRDJWWO INT IDENTIFIED iTIIFED N THE 17LE IS MR USE ��' � -I STVIV,
a FIELD CONDICTIONS AS DAND ETERMINED BY ME OR UNDER MY(SNOTMBEUCDFORREP�YOT"aiEIDELOREcr. �SSIONAL E��l
z DIRECT SUPERVISION ON THIS DATE: 08/23/2019. ADWO TO
4 /23/z'
6'
BERM
5
- - - - - - - - - - - - - 2 �1
- - - - - - - - - - - 21 /
---- - - - - -- MIN
TYP.
1 3\\/ EXISTING 1
GROUND
BOTTOM OF POND = 33.5
POLYETHYLENE C,
PERFORATED POLYETHYLENE
DRAINAGE TUBING, 4" MIN.
DIAMETER. TUBING SHALL
COMPLY WITH ASTM F667 AND
AASHTO M294
NOTE:
1. WIRE BACKED SILT FENCE, STAKED HAY
_ BALES WRAPPED WITH FILTER FABRIC, OR
EQUIVALENT DIVIDER. LOCATION SHALL
DIVIDE TEMPORARY SEDIMENT POND INTO
TWO APPROXIMATELY EQUAL CELLS.
■iom
_ 5
( 4
TACO M A • SEATTLE • SPOKANE -TRI-CITIES 1
2215 North 30th Street, Suite 300 Tacoma, WA 98403 N 0
19253.383.2422 TEL 253.383.2572 FAX www.ahbl.com NEB
RAMP REVISION
STORM DRAINAGE REVISIONS
CITY COMMENTS
ADDENDUM NO. 3
ADDENDUM NO. 1
REVISION
NOTE:
1. REMOVE SPILLWAY
RISER PRIOR TO
INSTALLATION OF FL(
CONTROL STRUCTUF
RISER.
PRINCIPAL SPILLWAY RISER PIPE
NOT TO SCALE
JOI NTS IN FILTER FABRIC SHALL BE SPLICED
AT POSTS. USE STAPLES, WIRE RINGS, OR
FOI IIVAI FNIT Tn ATTArl4 FARRIr Tn PMM
Li MAY,
POST SPACING MAY BE INCREASED
TO V IF WIRE BACKING IS USED
2'k2" BY 14 Ga. WIRE OR
EQUIVALENT, IF STANDARD
STRENGTH FABRIC USED
FILTER FABRIC
MINIMUM 4'x4' TRENCH
BACKFILL TRENCH WITH
NATIVE SOIL
2-x4- WOOD POSTS, STEEL FENCE
POSTS, REBAR, OR EQUIVALENT
Me
DEWATERING
CE. SCH. 40
L STUB.
NOTES
1. CONDITION OF USE
1.1. SILT FENCE MAY BE USED DOWNSLOPE OF ALL DISTURBED AREAS.
1.2. SILT FENCE IS NOT INTENDED TO TREAT CONCENTRATED FLOWS, NOR IS INTENDED TO TREAT SUBSTANTIAL AMOUNTS OF OVERLAND FLOW.
ANY CONCENTRATED FLOW MOST BE CONVEYED THROUGH THE DRAINAGE SYSTEM TO A SEDIMENT TRAP OR POND.
2. DESIGN AND INSTALLATION SPECIFICATIONS
2.1. THE GEOTEXTILE USED MOST MET THE STANDARD LISTED BELLOW. A COPY OF THE MANUFACTURER'S FABRIC SPECIFICATIONS MOST BE
AVAILABLE ON SITE.
30.100SIEVE SIZE(0.60-0.15MN1) FOR SILT FILM
AOS (ASTM D4751)
50-IOOSIEVE SIZE (MM-O.1SMM) FOR OTHER FABRICS
WATER PERMITTIVITY ASTM D491
0.02SEC11MINIMUM
GRAB TENSILE STRENCHT(ASTM D4632)
180 LBS. MN. FOR WRA STRENGH FABRIC
100 LBS. MIN. FOR STAN DARD STRENGHT FABRIC
GRAB TENSI LE ELONGATION (ASTM D4632)
30 % MAX.
ULTRAVIOLATE RESISTANCE(ASTM D4355)
70%MIN.
2.2. STANDARD STRENGTH FABRIC REQUIRES WIRE BACKING TO INCREASE THE STRENGTH OF THE FENCE. WIRE BACKING OR CLOSER POST
SPACING MAY BE REQUIRED FOR EXTRA STRENGTH FABRIC IF FIELD PERFORMANCE WARRANTS A STRONGER FENCE.
2.3. WHERE THE FENCE IS INSTALLED, THE SLOPE SHALL NOT BE STEEPER THAN 2HAV
2.4. IF A TYPICAL SILT FENCE IS USED, THE STANDARD 4X4 TRENCH MAY NOT BE REDUCED AS LONG AS THE BOTTOM 8 INCHES OF THE SILT FENCE
IS WELL BURIED AND SECURE IN A TRENCH THAT STABILIZES THE FENCE AND DOES NOT ALLOW WATER TO BYPASS OR UNDERMINE THE SILT
FENCE.
3. MAINTENANCE STANDARDS
3.1. ANY DAMAGE SHALL BE REPAIR IMMEDIATELY.
3.2. IF CONCENTRATED FLOES ARE EVIDENT UPHILL OD THE FENCE, THEY MUST BE INTERCEPTED AND CONVEYED TO A SEDIMENT TRAP OR POND.
3.3. IT IS IMPORTANT TO CHECK THE UPHILL SIDE OF THE FENCE FOR SIGNS OF THE FENCE CLOGGING AND ACTING AS A BARRIER TO FLOW AND
THEN CAUSING CHANNELIZATION OF FLOWS PARALLEL TO THE FENCE. IF THIS OCCURS, REPLACE THE FENCE OR REMOVED THE TRAP
SEDIMENT.
3.4. SEDIMENT MOST BE REMOVED WHEN SEDIMENT IS 6 INCHES HIGH.
3.5. IF THE FILTER FABRIC (GEOTE)CTILE) HAS DETERIORATED DUE TO ULTRAVIOLET BREAKDOWN, IT SHALL BE REPLACED.
ti�Y�o { PUBLIC WORKS SILT FENCE STD. PLAN - 214.00
=` $ DEPARTMENT
1Vtp MARCH 2O08
INFLOW -
RISER PIPE
(PRINCIPAL SPILLWAY)
OPEN AT TOP WITH
TRASH RACK \
DEWATERING DEVICE
(SEE RISER DETAIL) \
FLOW
STABILIZED
ORUTLET OR
CRESTOF
WMIN. WIDTH
EMERGENCY SPILLWAY
/
I'MIN.
EMBANKMENT COMPACTED 95%.
1, _ _ _ _
_ _ _
PERVIOUS MATERIALS SUCH AS
GRAVEL OR CLEAN SAND SHALL
-�
NOT BE USED.
-- =------------ay
------------
DEWATERING
-III-_ I I - -
WIRE -BACKED SILT FENCE, ORIFICEW-1=1 III -I I I�I-kSTAKED HAYBALES WRAPPED I I I_I I C
WITH FILTER FABRIC, OR 1DISCHARGE TO STABILIZED
EQUIVALENT DIVIDER CONCRETE BASE CONVEYANCE, OUTLET OR
LEVEL SPREADER
NOTES
1. CONDITION OF USE
1.1. A SEDIMENT POND SHALL BE USED WHERE THE CONTRIBUTING DRAINAGE AREA IS 3 ACRES OR MORE.
2. DESIGN AND INSTALLATION SPECIFICATIONS
2.1. THE POND SHALL BE DIVIDED INTO TWO ROUGHLY EQUAL VOLUME CELLS BYA PERMEABLE DIVIDER THAT WILL REDUCE TURBULENCE WHILE
ALLOWING MOVEMENT OF WATER BETWEEN CELLS. THE DIVIDER SHALL BE AT LEAST ONE HALF OF THE HEIGHT OF THE RISER. WIRE - BACKE
2-TO 3 FOOT HIGH, EXTRA STRENGTH FILTER FABRIC SUPPORTED BY TREATED 4-Xrs MAY BE USED AS A DIVIDER. ALTERNATIVELY, STAKED
STRAW BALES WRAPPED WITH FILTER FABRIC MAY BE USED.
2.2. IF THE POND IS MORE THAN 6 FEET DEEP, A DIFFERENT MECHANISM MUST BE PROPOSED.
2.3. TO AID IN DETERMINING SEDIMENT DEPTH, ONE -FOOT INTERVALS SHALL BE PROMINENTLY MARKED ON THE RISER.
3. MAINTENANCE STANDARDS
3.1. SEDIMENT SHALL BE REMOVED FROM THE POND WHEN IT REACHES 1 FOOT IN DEPTH.
3.2. ANY DAMAGES TO THE POND EMBANKMENTS OR SLOPES SHALL BE REPLACED.
�'�► '� PUBLIC WORKS SEDIMENT POND PLAN VIEW
STD. PLAN - 216.00 DEPARTMENT AND CROSS SECTIONS
MARCH 2O08
SEDIMENT POND PLAN VIEW AND CROSS
SECTIONS (COR STD. PLAN 216.00)
J f NOT TO SCALE
CRUSHED SURFACING BASE
N 0 0 0 0 0 COURSE PER WSDOT 9.03-9(3)
0 0 0
0
O O O QUARRY SPALLS
0 0 0
G EOG RI D
NOTES: SUBGRADE
1. ALL DEPTHS SHOWN ARE COMPACTED DEPTHS.
CONTRACTOR LAYDOWN AREA SECTION
NOT TO SCALE
EMERGENCY OVERFLOW WATER SURFACE
3"
z��.- -1 - ELEV = "TOP OF BERM"
1.0' SPILLWAY DEPTH\� `\ 7,
ELEV = "EMERGENCY OVERFLOW"
V MIN. THICK RIP -RAP. 4"
NON -WOVEN GEOTEXTILE 1 TO 8" QUARRY SPALLS
FABRIC. MIRAFI 140N OR
EQUIVALENT
EMERGENCY OVERFLOW SPILLWAY
5 NOT TO SCALE
APPROVED FOR CONSTRUCTION
SUBJECT TO ERRORS AND OMISSIONS
SILT FENCE (COR STD. PLAN 214.00) BY: DATE:
NOT TO SCALE BY: DATE:
BY: DATE:
BY: DATE:
WJF
2/22/181
WJF
SURVEYED:
SCALE:
D. FOLLANSBEE
AS SHOWN
WJF
12/13/17
WJF
DESIGNED:
G. TAUSCHECK
WJF
4/21/17
WJF
WJF
3/17/17
WJF
DRAWN:
F. KATONA
ONE INCH
AT FULL SCALE
IF NOT ONE INCH
WJF
3/1/1 7
WJF
CHECKED:
W. FIERST
BY
DATE
APPR
SCALE ACCORDINGLY
APPROVED:
S. COMFORT
CONSTRUCTION RECORD DRAWINGS
HOR ZO TICA : HAD D 91968 1 ��-y
°� CITY OF
REN TON
DATUM
Planning/Building/Public Works Dept.
SARTORI ELEMENTARY SCHOOL
RENTON SCHOOL DISTRICT
TESC NOTES AND DETAILS II
05/04/2017
FIELDBOOK:
PAGE:
DRAWING NO:
C2.4
SHEET: OF:
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R-393007