CC - Storm Drain Details m 0�� GE SF�
= OBSERVATION WELL RIM ELEVATION
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PER PLAN 0
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11-12-21
M.G�
cn GRADE RINGS AS REQUIRED
(18" MAX.)
FINISHED RIM DE LUSH
4 a a 4 4 a a 4 a a 4 a a a rn
C�\J�/�/ �/�/ WRAP TOP AND SIDES OF TRENCH IN
Y 4 4 4 4 4 4 „ ^ 4 4 4 4 4 4 4 20" BAFFLE WIDTH
2 WASHED
NON-WOVEN FILTER FABRIC. SEAMS
4 4��Ja 4 4�� DRAIN 4�� 4 4 4 SHALL OVERLAP A MINIMUM OF 1'.
Ld w JW � E
4 4 4 �Ja �Ja 4 �Ja 4 4 4 4 4 m
~ 12" INLET PIPE PER PLAN �
BAFFLE »C„
4 w ELEVATION BAFFLE "B" 18" OUTLET PIPE PER PLAN N L o Q) 00
w O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O = ELEVATION p ry) c M
O AND DETAIL 1 THIS SHEET co ,
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HDPE OR
_z 4 18" ADS, a a a a a a a a a a a u o
PVC PERFORATED a m E N
PIPE. PERFORATIONS (fix ) (�1( , (�1J(
a_ IN TOP HALF ONLY.
a �,� �,�,� 4 4 4 41 4 <1_43 4 4 a ac PROFILE VIEW fu
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LdSAND AND GREASE TRAP
4 a 4 4 4 4 a 4 4 Q4 4 a Q4 4
a 4 Qa 4� 4 a 4� a a a 4 Qa 4 VAULT OR AP ROVED EQUALBOISE WITH
cn BAFFLES) SIZE PER TABLE 24" DIA. TRAFFIC RATED FRAME AND
cn SAND AND GREASE TRAP
w ? = STANDARD MANHOLE COVER PER
(ACHD BMP #01). SEE ASTM C33 � I-
a_ a ISPWC SD-617.
x DETAIL 2 THIS SHEET. FILTER SAND -n Li
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OVEREXCAVATE A MINIMUM OF 2' INTO FREE / / / � '� a
� \ \ \ \ \ \ \ \ \ �«1` w41NING \ \ \ \ \ \ \ \ \ 12 INLET PIPE PER PLAN o
DRAINING MATERIAL (SEE TABLE FOR PERC
cn RATE) AND BACKFILL WITH 6" MINUS PIT
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RUN OR ASTM C33 FILTER SAND / \\/ \\/ \\/ \\/ \\/ \\/ \\/ \\/ \\/ \\// \\/\\\// \\/ \\/�\\/�\\/�\ \\/�\\/�\\/�\\/�\\/. R o
z ESTIMATED HIGH
PROFILE VIEW GROUNDWATER =
U = NOT ENCOUNTERED J
PORTION OF OBSERVATION WELL LYING
o IN DRAINAGE SAND MUST BE WRAPPED > z o OUTLET PIPE PER PLAN
WITH TYPE I DRAINAGE GEOTEXTILE PER Q -i AND DETAIL 1 THIS SHEET
z ISPWC SECTION 2050. w a_ 0
00w
o PLAN VIEW o
cn Z
z � � w
cn SAND AND GREASE TRAP LENGTH PER TABLE w Of z
(ACHD BMP #01). SEE cn J
DETAIL 2 THIS SHEET. a w
o 2� o SAND AND GREASE TRAP TABLE
bi
o "' v STRUCTURE NAME SIZE RIM ELEV. INV. ELEV. IN BAFFLE "B" ELEV. BAFFLE "C" ELEV. INV. ELEV. OUT
� w O
Q � z
Q SG TRAP #1-1 1000 GALLON 2755.11' 2750.85' 2750.75' 2750.25' 2750.00' >
� 18" PERFORATED PIPE WITH PERFORATIONS TOP HALF ONLY i5 w
oO O bi SG TRAP #2-1 1000 GALLON 2763.33' 2758.85' 2758.75' 2758.25' 2758.00'
DESIGNED: C. GRAHAM
0 o SG TRAP #3-1 1000 GALLON 2767.30' 2761.35' 2761.25' 2760.75' 2760.50'
DRAWN: C. GRAHAM
3
cwn INLET PIPE PER PLAN SG TRAP #4-1 1500 GALLON 2769.86' 2765.35' 2765.25' 2764.75' 2764.50' CHECKED: C. GRAHAM
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SG TRAP #5-1 1000 GALLON 2772.16' 2767.35' 2767.25' 2766.75' 2766.50' APPROVED: C. GRAHAM
z SG TRAP #6-1 1000 GALLON 2773.13' 2769.35' 2769.25' 2768.75' 2768.50'
O 50' MIN. PLAN VIEW
v OBSERVATION WELL 5' MIN. PREPARED FOR:
PER ACHD SD-627 ELECTRONIC MARKERS PLACED ON CORNER SG TRAP #7-1 1000 GALLON 2770.23 2766.35 2766.25 2765.75 2765.50
0 INSTALL 30 MIL PVC LINER ALONG OF FACILITY (ACHD SEEPAGE BED #1 ONLY). G20 LLC
0� COORDINATE WITH ACHD INSPECTION STAFF
w SOUTH SIDE AND ENDS OF SEEPAGE FOR PLACEMENT OF MARKERS DURING PO BOX 593
�
BEDS #4P AND #5P AND WEST SIDE CONSTRUCTION PRIOR TO BACKFILLING. SAND AND GREASE TRAP DETAIL (ACHD BMP #0� ) 2
OF #6P FOR REDUCED SEPARATION EAGLE, ID 83616
z TO WATER MAIN SCALE: NOT TO SCALE C9.2
Q OBSERVATION WELL
PER ACHD SD-627
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NOTES
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� 1. ACCORDING TO THE PROJECT GEOTECHNICAL REPORT PREPARED BY ATLAS DATED SEPTEMBER 15, 2020,
0 GROUNDWATER WAS NOT ENCOUNTERED DURING GEOTECHNICAL EXPLORATION. CONTRACTOR SHALL NOTIFY
THE ENGINEER IMMEDIATELY IF GROUNDWATER IS ENCOUNTERED WITHIN 3-FEET OF THE BOTTOM DESIGN
ELEVATION FROM ANY INFILTRATION FACILITY AND/OR IF IT IS HIGHER THAN ANTICIPATED.
V)
J 2. REFER TO ACHD BMP 20 FOR ADDITIONAL INFORMATION REGARDING SEEPAGE BED CONSTRUCTION. r
v 3. ACHD STAFF MUST VERIFY FACILITY INFILTRATION RATE AFTER FACILITY IS FULLY EXCAVATED.
o Z V J
Z Z Q
o SEEPAGE BED TABLE p J w
a_
w SEEPAGE BED NO. SEEPAGE BED DIMENSIONS TOP OF ROCK ELEV. BOTTOM OF ROCK ELEV. BOTTOM OF SAND ELEV. PERF. PIPE INVERT PERF. PIPE DIAMETER 100-YEAR VOLUME DESIGN INFILTRATION RATE
z
Ln SEEPAGE BED #1 12'Wx67'Lx10'D 2753.00' 2743.00' 2741.50' 2750.00' (1) 18" 3,761 CF 8 IN/HR Q LZ i
wSEEPAGE BED #2P 1O'Wx65'Lx10'D 2761.00' 2751.00' 2749.50' 2758.00' (1) 18" 3,061 CF 8 IN/HR W
Ln > Q
S SEEPAGE BED #3P 20'Wx67'Lx10'D 2764.00' 2754.00' 2752.50' 2760.50' (18") (1) 18" 6,236 CF 8 IN/HR
2762.00' (12") (1) 12 O
SEEPAGE BED #4P 11'Wx123'Lx10'D 2767.50' 2757.50' 2756.00' 2764.50' (1) 18" 6,331 CF 8 IN/HR LL J
O
SEEPAGE BED #5P 8'Wx100'Lx10'D 2769.50' 2759.50' 2758.00' 2766.50' (1) 18" 3,757 CF 8 IN/HR m -
SEEPAGE BED #6P 8'Wx92'Lx10'D 2771.50' 2761.50' 2760.00' 2768.50' (1) 18" 3,469 CF 8 IN/HR
()
SEEPAGE BED #7P 6.5'Wx128'Lx10'D 2768.50' 2758.50' 2757.00' 2765.50' (1) 18" 3,917 CF 8 IN/HR
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SEEPAGE BED DETAIL (ACHD BMP #20) 1
J SCALE: NOT TO SCALE C9.2
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N CSW PROJECT NO. 19044
DRAWING DATE 11/12/2021
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