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SEEPAGE BED NOTES � C) j 1
1. PIPE PERFORATION TO BE 3/8" PERFORATIONS IN VALLEYS OF CORRUGATED PIPE. 5 EA ON TOP HALF. o m
2. BOTTOM OF STORAGE ROCK SHALL BE A MINIMUM OF 3'ABOVE GROUND WATER LEVEL. NOTIFY ENGINEER 20 7E N
IMMEDIATELY IF LESS THAN 3' FROM THE BOTTOM OF DESIGN ELEVATION FOR ANY INFILTRATION FACILITY. O a� o
3. SEEPAGE BED LENGTH, 2" WASHED DRAIN ROCK DEPTH AND ELEVATIONS ARE SHOWN ON SEEPAGE BED DATA TT~i C z
TABLE. w C o
4. CONTRACTOR TO HAVE PERCOLATION TEST PERFORMED BY GEOTECHNICAL ENGINEER AFTER DRAINAGE c\1 v
STRUCTURES ARE FULLY EXCAVATED. IF PERCOLATION IS LESS THAN DESIGN RATE. CONTRACTOR SHALL BE t } V! _o
REQUIRED TO BLAST IN ORDER TO CREATE FRACTURES IN THE ROCK FOR DRAINAGE TO OCCUR. v w C
5. IF DESIGN INFILTRATION RATES CANNOT BE ACHIEVED, CONTACT THE DESIGN ENGINEER FOR SEEPAGE BED < Cn 3 o
DESIGN ADJUSTMENTS. z
1/2 1/4 0 1/2 Full I •> C)
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Graphic Scale: � —
�C75 o
Attention is Drawn to the Fact That Drawing Scales May be ` _> z
LENGTH Altered During Reproduction Processes. Scales Shown DC �
Hereon are Based on a Full Scale Sheet Size of 24"x 36". 4— O
CD N
Scale: 1"=20'
T
5 LF 18" CORRUGATED HDPE OR PVC F---------- ——— ---------�
NON-PERFORATED PIPE I I
O I
18" CORRUGATED HDPE OR PVC PERF. PIPE
WIDTH
18" PVC END CAP I
I I
I I
GROUND WATER z I
OBSERVATION WELL W/ I I
TRAFFIC RATED LID I I
(PER ISPWC SD-627) J 7
PLAN VIEW 6 L
N.T.S. Q
MINIMUM 50'
J
3 - -
5
PLAN VIEW z C 1J
4 V
LL
UTLET
FLOW CD BAFFLE WALL
ELEV B FLOW
GROUND WATER FINISH GRADE AND/OR
LEV A
GROUND WATER OBSERVATION WELL W/ CONCRETE SIDEWALK ELEV D�
OBSERVATION WELL W/ TRAFFIC RATED LID 4
TRAFFIC RATED LID (PER ISPWC SD-627) NON-WOVEN FABRIC INLET T4 IZ
(PER ISPWC SD-627) TOP OF TRENCH ELEV C BAFFLE WALL
F: SEE TABLE UJ
24 � O
Q
MINIMUM 50' " � � Q
TOP OF TRENCH EL: SEE TABLE SECTION A-A Q
N.T.S. J
Z
12" MIN. NOTES O
18" CORRUGATED HDPE 1. SAND AND GREASE TRAP USED FOR SUBSURFACE FACILITIES ONLY
OR PVC PERF. PIPE O �
LEGEND: LLJ
5' NON-PERFORATED PIPE INTO TRENCH MANHOLE FRAME AND COVER PER SD-617 (TYPICAL) ZLOCATION AND FL ELEV. PER DESIGN PLANS (TYPICAL) UJ
PIPE INVERT EL: SEE TABLE s H 1-FT USE GRADE RINGS (TYPICAL)
sc
1-FT < H <= 2-FT USE 24" DIA RCP RISER
2-FT < H <= 10-FT USE MANHOLE CONE &48" DIA RISERS
EL. A> EL. B BY 0.10' MIN
EL. D < EL. BBY0.10' MIN
EL. C < EL. B BY 0.50' MIN. UNLESS OTHERWISE APPROVED BY ACHD
2" WASHED DRAIN w
WATERTIGHT SEAL
ROCK SEE SEEPAGE 5
BED DATA TABLE s PRECAST BOX MANUFACTURER SHALL MARK FLOW DIRECTION AND LABEL INLET OR OUTLET
ON SIDE OF BOX
BOTTOM OF ROCK EL: SEE TABLE U
1811 Q
REPLACE NATIVE MATERIAL WITH
ASTM C-33 SAND OR EQUIVALENT
SAND AND GREASE TRAP M
3' MIN. `y J
WRAP TRENCHES (ON •
ENDS AND SIDES)WITH
DRAINAGE GEOTEXTILE
TYPE 1 (ISPWC SEC 2060) BOTTOM OF SAND/BOTTOM MAX HSGW EXPECTED TO BE AT DRAWN BY: ALA
OF TRENCH 2548.00 PER GEOTECH REPORT
SEEPAGE BED CHECKED BY: AMC
DATE: 03/24/2023
SEEPAGE BED TABLE REVISIONS
BOTTOM OF # DATE
BED NO. LENGTH WIDTH ROCK DEPTH TOP OF TRENCH PIPE INVERT ROCK Z --/--/----
EXISTING BED #1 67'-0" 15-0" 4'-0" 2556.82 2554.22 2552.82 #
BED #2 22'-0" 15-0" 5'-0" 2557.07 2554.47 2552.07 # --/--/----
EXISTING BED #3 58'-0" 15-0" 4'-0" 2556.26 2553.66 2552.26
Project No.
R22116
�S\ONAL EN�i
G\STERFp OFF
UTILITY DETAILS
6
,�,3/24/23�0
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