HomeMy WebLinkAboutC9.2_Storm Drain Details V10
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OBSERVATION WELL
PER ACHD SD-627
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 c 0 0 0 0 0
W-Yl�O o as 7a as �aa y 77 a � 7'
z a 18" ADS, HDPE OR �a� �a� Ua �a�
� PVC PERFORATED n��n�/�n�
IIINETOP HFALFAONNY.1LG,����CG���CG,v�Vv
SAND AND GREASE TRAP
(ACHD BMP #01). SEE
DETAIL 2 THIS SHEET.
OVEREXCAVATE A MINIMUM OF 2' INTO FREE
DRAINING MATERIAL (SEE TABLE FOR PERC
RATE) AND BACKFILL WITH 6" MINUS PIT
RUN OR ASTM C33 FILTER SAND
SAND AND GREASE TRAP
(ACHD BMP #01). SEE
DETAIL 2 THIS SHEET.
INLET PIPE PER PLAN
O O
50' MIN.
M
OBSERVATION WELL
PER ACHD SD-627
' ASTM C33 -
FILTER SAND
ARIVEMATEE�RAI�R
PROFILE VIEW
PORTION OF OBSERVATION WELL LYING
IN DRAINAGE SAND MUST BE WRAPPED
WITH TYPE I DRAINAGE GEOTEXTILE PER
ISPWC SECTION 2050.
18" PERFORATED PIPE WITH PERFORATIONS TOP HALF ONLY
PLAN VIEW
OBSERVATION WELL
PER ACHD SD-627
INSTALL 30 MIL PVC LINER ALONG
SOUTH SIDE AND ENDS OF SEEPAGE
BEDS #4P AND #5P AND WEST SIDE
OF #6P FOR REDUCED SEPARATION
TO WATER MAIN
NOTES
5' MIN.
1. ACCORDING TO THE PROJECT GEOTECHNICAL REPORT PREPARED BY ATLAS DATED SEPTEMBER 15, 2020,
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.
2. REFER TO ACHD BMP 20 FOR ADDITIONAL INFORMATION REGARDING SEEPAGE BED CONSTRUCTION.
3. ACHD STAFF MUST VERIFY FACILITY INFILTRATION RATE AFTER FACILITY IS FULLY EXCAVATED.
WRAP TOP AND SIDES OF TRENCH IN
NON -WOVEN FILTER FABRIC. SEAMS
SHALL OVERLAP A MINIMUM OF 1'.
ESTIMATED HIGH
GROUNDWATER
NOT ENCOUNTERED
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ELECTRONIC MARKERS PLACED ON CORNER
OF FACILITY (ACHD SEEPAGE BED #1 ONLY).
COORDINATE WITH ACHD INSPECTION STAFF
FOR PLACEMENT OF MARKERS DURING
CONSTRUCTION PRIOR TO BACKFILLING.
12" INLET PIPE PER PLAN
SAND AND GREASE TRAP (BOISE
VAULT OR APPROVED EQUAL WITH
BAFFLES) SIZE PER TABLE
12" INLET PIPE PER PLAN
PROFILE VIEW
PLAN VIEW
RINGS AS REQUIRED
X.) SET RIM FLUSH
DISHED GRADE
B" OUTLET PIPE PER PLAN
NO DETAIL 1 THIS SHEET
24" DIA. TRAFFIC RATED FRAME AND
STANDARD MANHOLE COVER PER
ISPWC SD-617.
OUTLET PIPE PER PLAN
AND DETAIL 1 THIS SHEET
SAND AND GREASE TRAP TABLE
STRUCTURE NAME
SIZE
RIM ELEV.
INV. ELEV. IN
BAFFLE "B" ELEV.
BAFFLE "C" ELEV.
INV. ELEV. OUT
SG TRAP #1-1
1000 GALLON
2755.11'
2750.85'
2750.75'
2750.25'
2750.00'
SG TRAP #2-1
1000 GALLON
2763.33'
2758.85'
2758.75'
2758.25'
2758.00'
SG TRAP #3-1
1000 GALLON
2767.30'
2761.35'
2761.25'
2760.75'
2760.50'
SG TRAP #4-1
1500 GALLON
2769.86'
2765.35'
2765.25'
2764.75'
2764.50'
SG TRAP #5-1
1000 GALLON
2772.16'
2767.35'
2767.25'
2766.75'
2766.50'
SG TRAP #6-1
1000 GALLON
2773.13'
2769.35'
2769.25'
2768.75'
2768.50'
SG TRAP #7-1
1000 GALLON
2770.23'
2766.35'
2766.25'
2765.75'
2765.50'
SEEPAGE BED TABLE
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
SEEPAGE BED #1
12'Wx67'Lx10'D
2753.00'
2743.00'
2741.50'
2750.00'
(1) 18"
3,761 CF
8 IN/HR
SEEPAGE BED #2P
10'Wx65'Lx10'D
2761.00'
2751.00'
2749.50'
2758.00'
(1) 18"
3,061 CF
8 IN/HR
SEEPAGE BED #3P
20'Wx67'Lx10'D
2764.00'
2754.00'
2752.50'
2760.50' (18")
2762.00' (12")
(1) 18"
(1) 12"
6,236 CF
8 IN/HR
SEEPAGE BED #4P
11'Wx123'Lx10'D
2767.50'
2757.50'
2756.00'
2764.50'
(1) 18"
6,331 CF
8 IN/HR
SEEPAGE BED #5P
8'Wx100'Lx10'D
2769.50'
2759.50'
2758.00'
2766.50'
(1) 18"
3,757 CF
8 IN/HR
SEEPAGE BED #6P
B'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
SEEPAGE BED DETAIL (ACHD BMP #20) �1�
SCALE: NOT TO SCALE C9.2
SAND AND GREASE TRAP DETAIL (ACHD BMP #01)
SCALE: NOT TO SCALE C9.2
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11-12-21
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DESIGNED:
C.
GRAHAM
DRAWN:
C.
GRAHAM
CHECKED:
C.
GRAHAM
APPROVED:
C.
GRAHAM
PREPARED FOR:
G20 LLC
PO BOX 593
EAGLE, ID 83616
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CSW PROJECT NO, 19044
DRAWING DATE 11/12/2021
C9.2