2020.0341.PR0011 Prelim Plat PlansPO Box 12690Olympia, WA 98508360.705.2474Www.olyeng.com CHRIM.MERSTR
ITHOT EP
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PO Box 12690Olympia, WA 98508360.705.2474Www.olyeng.com CHRIM.MERSTR
ITHOT EP
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TYPE 2 CATCH BASIN
(CB#10)
BOTTOM ELEV. = 319.00
8'
(2.4 m)
MAX
18"
(450 mm) MIN*
MATERIAL LOCATION DESCRIPTION
AASHTO MATERIAL
CLASSIFICATIONS
COMPACTION / DENSITY
REQUIREMENT
D
FINAL FILL: FILL MATERIAL FOR LAYER 'D' STARTS
FROM THE TOP OF THE 'C' LAYER TO THE BOTTOM
OF FLEXIBLE PAVEMENT OR UNPAVED FINISHED
GRADE ABOVE. NOTE THAT PAVEMENT SUBBASE
MAY BE PART OF THE 'D' LAYER
ANY SOIL/ROCK MATERIALS, NATIVE SOILS, OR PER
ENGINEER'S PLANS. CHECK PLANS FOR PAVEMENT
SUBGRADE REQUIREMENTS.
N/A
PREPARE PER SITE DESIGN ENGINEER'S PLANS.
PAVED INSTALLATIONS MAY HAVE STRINGENT
MATERIAL AND PREPARATION REQUIREMENTS.
C
INITIAL FILL: FILL MATERIAL FOR LAYER 'C'
STARTS FROM THE TOP OF THE EMBEDMENT
STONE ('B' LAYER) TO 18" (450 mm) ABOVE THE
TOP OF THE CHAMBER. NOTE THAT PAVEMENT
SUBBASE MAY BE A PART OF THE 'C' LAYER.
GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35%
FINES OR PROCESSED AGGREGATE.
MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEU
OF THIS LAYER.
AASHTO M145 ¹
A-1, A-2-4, A-3
OR
AASHTO M43 ¹
3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89,
9, 10
BEGIN COMPACTIONS AFTER 12" (300 mm) OF
MATERIAL OVER THE CHAMBERS IS REACHED.
COMPACT ADDITIONAL LAYERS IN 6" (150 mm) MAX
LIFTS TO A MIN. 95% PROCTOR DENSITY FOR
WELL GRADED MATERIAL AND 95% RELATIVE
DENSITY FOR PROCESSED AGGREGATE
MATERIALS. ROLLER GROSS VEHICLE WEIGHT
NOT TO EXCEED 12,000 lbs (53 kN). DYNAMIC
FORCE NOT TO EXCEED 20,000 lbs (89 kN).
B
EMBEDMENT STONE: FILL SURROUNDING THE
CHAMBERS FROM THE FOUNDATION STONE ('A'
LAYER) TO THE 'C' LAYER ABOVE.
CLEAN, CRUSHED, ANGULAR STONE, NOMINAL SIZE
DISTRIBUTION BETWEEN 3/4-2 INCH (20-50 mm)
AASHTO M43 ¹
3, 357, 4, 467, 5, 56, 57 NO COMPACTION REQUIRED.
A
FOUNDATION STONE: FILL BELOW CHAMBERS
FROM THE SUBGRADE UP TO THE FOOT (BOTTOM)
OF THE CHAMBER.
CLEAN, CRUSHED, ANGULAR STONE, NOMINAL SIZE
DISTRIBUTION BETWEEN 3/4-2 INCH (20-50 mm)
AASHTO M43 ¹
3, 357, 4, 467, 5, 56, 57
PLATE COMPACT OR ROLL TO ACHIEVE A FLAT
SURFACE. ² ³
PLEASE NOTE:
1. THE LISTED AASHTO DESIGNATIONS ARE FOR GRADATIONS ONLY. THE STONE MUST ALSO BE CLEAN, CRUSHED, ANGULAR. FOR EXAMPLE, A SPECIFICATION FOR #4 STONE WOULD STATE: "CLEAN, CRUSHED,
ANGULAR NO. 4 (AASHTO M43) STONE".
2. STORMTECH COMPACTION REQUIREMENTS ARE MET FOR 'A' LOCATION MATERIALS WHEN PLACED AND COMPACTED IN 6" (150 mm) (MAX) LIFTS USING TWO FULL COVERAGES WITH A VIBRATORY COMPACTOR.
3. WHERE INFILTRATION SURFACES MAY BE COMPROMISED BY COMPACTION, FOR STANDARD DESIGN LOAD CONDITIONS, A FLAT SURFACE MAY BE ACHIEVED BY RAKING OR DRAGGING WITHOUT COMPACTION
EQUIPMENT. FOR SPECIAL LOAD DESIGNS, CONTACT STORMTECH FOR COMPACTION REQUIREMENTS.PO Box 12690Olympia, WA 98508360.705.2474Www.olyeng.com CHRIM.MERSTR
ITHOT EP
RNOTES:
1. SC-740 CHAMBERS SHALL CONFORM TO THE REQUIREMENTS OF ASTM F2418 "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS",
OR ASTM F2922 "STANDARD SPECIFICATION FOR POLYETHYLENE (PE) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS".
2. SC-740 CHAMBERS SHALL BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION
CHAMBERS".
3. "ACCEPTABLE FILL MATERIALS" TABLE ABOVE PROVIDES MATERIAL LOCATIONS, DESCRIPTIONS, GRADATIONS, AND COMPACTION REQUIREMENTS FOR FOUNDATION, EMBEDMENT, AND FILL
MATERIALS.
4. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR ASSESSING THE BEARING RESISTANCE (ALLOWABLE BEARING CAPACITY) OF THE SUBGRADE SOILS AND THE DEPTH OF FOUNDATION STONE
WITH CONSIDERATION FOR THE RANGE OF EXPECTED SOIL MOISTURE CONDITIONS.
5. PERIMETER STONE MUST BE EXTENDED HORIZONTALLY TO THE EXCAVATION WALL FOR BOTH VERTICAL AND SLOPED EXCAVATION WALLS.
6. ONCE LAYER 'C' IS PLACED, ANY SOIL/MATERIAL CAN BE PLACED IN LAYER 'D' UP TO THE FINISHED GRADE. MOST PAVEMENT SUBBASE SOILS CAN BE USED TO REPLACE THE MATERIAL
REQUIREMENTS OF LAYER 'C' OR 'D' AT THE SITE DESIGN ENGINEER'S DISCRETION.
INSPECTION PORT
12" X 12" ADS N-12 MANIFOLD
PLACE MINIMUM 12.5' OF ADS GEOSYNTHETICS 315WTK WOVEN
GEOTEXTILE OVER BEDDING STONE AND UNDERNEATH CHAMBER
FEET FOR SCOUR PROTECTION AT ALL CHAMBER INLET ROWS
EXCAVATION WALL
(CAN BE SLOPED OR VERTICAL)
SUBGRADE SOILS
(SEE NOTE 5)
ADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE ALL
AROUND CLEAN, CRUSHED, ANGULAR STONE IN A & B LAYERS
12" (300 mm) MIN
PERIMETER STONE
(SEE NOTE 6)
SC-740
END CAP
*TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED
INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY OCCUR,
INCREASE COVER TO 24" (600 mm).
51" (1295 mm)6"
(150 mm) MIN
A
B
C
D
30"
(760 mm)
12"
12" (300 mm) TYP
6" (150 mm) MIN
PAVEMENT LAYER (DESIGNED
BY SITE DESIGN ENGINEER)
ACCEPTABLE FILL MATERIALS: STORMTECH SC-740 CHAMBER SYSTEMS
SECTION A-A
A A
BAYSAVER - BAYFILTER DETAIL (CB#9)
NTS
12"Ø PIPE - INLET - 324.70
36" FRAME AND COVER (MARKED
"STORM" PER WSDOT STANDARD
PLAN B-30.70-03
12"Ø INLET
TREATED SEDIMENT CAPACITY
# BAYFILTER CARTRIDGES
CARTRIDGE DESIGN FLOW RATE
DRAINAGE AREA
WATER QUALITY FLOW
BAYFILTER
60-2 MANHOLE
LOCATION
PROJECT
36" FRAME & COVER
2
MOUNTAIN MEADOWS
CB#10
30 GPM
0.1051 CFS
12"Ø PIPE - OUTLET - 322.03
OVERFLOW ELEV.=168.20
COVERED BYPASS
12"Ø OUTLET
RIM - ±173.00
NOTE:
SEE WSDOT STANDARD PLANS
B-10.20-01 B-30.90-01 FOR ACCESS
AND STEP/LADDER LOCATION/
ORIENTATION AND DETAILS.