HomeMy WebLinkAboutR-412723DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
DocuSign Envelope ID: 6EEC F5B6-602A-4E4A-B436-A317AA638878
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DESIGNER TO SPECIFY WATER STORAGE ELEVATION
OVERFLOW STRUCTURE PER STD. PLAN
FOR EDGE TREATMENT OPTIONS,
262.40 UNLESS SPECIFIED OTHERWISE
SEE STD. PLAN 262.20
OR LANDSCAPING
JSIDEWALK
BOTTOM WIDTH SIDE SLOPE 'f TREE, SEE NOTE 9
ROADWAYI V MIN.
LOT
MIN. 18"
TOP OF BANK '
6" MIN.
B' MIN.
PARKING
_
ELEVATION `"
2%
2"-12" PONDING
FREEBOARD
y
� DEPTH
�
1°
1.5
-
' 25MIN.
= ^
'2.5 MIN.
"
TRANSITION ZONE SOIL. /
SEE STD. PLAN 262.20
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2"4'DEPTH ARBORIST
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WOOD CHIP MULCH, �'�:,I•-'„ >.`, _�`_:'_'{"-Y' �� ANGLE OF REPOSE
SEE NOTE 7 '� �(.• '1'' - :'VY. , '•"`
BIORETENTION SOIL MIX (BSM),
SEE NOTE 5
r� I 12' MIN.
UNDERDRAIN AGGREGATE,
SEE NOTE 6
OVERFLOW TO STORM MAIN
/ SCARIFIED AND UNCOMPACTED SUBGRADE,
LOW PERMEABILITY LINER SEE NOTES 1 AND 2
WHEN REQUIRED, SEE NOTE 3 '
UNDERDRAIN, SEE NOTE 4
NOTES: GRAVEL BASE, SEE STO. PLAN 262.40
1. AVOID COMPACTION OF EXISTING SUBGRADE BELOW BASIN.
2. SCARIFY SUBGRADE TO A DEPTH OF 31NCHES MINIMUM IMMEDIATELY PRIOR TO PLACEMENT OF BIORETENTION SOIL MIX AND UNDERDRAIN AGGREGATE,
EXCEPT WHEN LINER IS REQUIRED.
3. LINER TO BE INSTALLED ONLY WHEN REQUIRED IN THE CITY OF RENTON SURFACE WATER DESIGN MANUAL (RENTON SWDM). LOW PERMEABILITY LINER TO
BE 30 MIL MIN. GEOMEMBRANE LINER OR 12 INCHES MIN. (DRY) CLAY LINER. CLAY LINER TO BE COMPACTED TO 95% MINIMUM DRY DENSITY (ASTM D698),
WITH AT LEAST 30% CLAY PARTICLES PASSING ASTM D422 AND AT LEAST 15% PLASTICITY INDEX ASTM D4318 .
4. UNDERDRAIN TO BE 6" MIN. (PRIVATE), 8" MIN. (PUBLIC) SLOTTED PVC PER ASTM D1785 SCH 40. SLOTS SHOULD BE CUT PERPENDICULAR TO THE LONG AXIS
OF THE PIPE AND BE 0.04 TO 0.069 INCHES BY 1 INCH LONG AND BE SPACED 0.25 INCHES APART (SPACED LONGITUDINALLY). SLOTS SHOULD BE ARRANGED
IN FOUR ROWS SPACED ON 45-DEGREE CENTERS AND COVER 112 OF THE CIRCUMFERENCE OF THE PIPE. SLOPE PIPE AT 0.5% MIN UNLESS OTHERWISE
SPECIFIED. PROVIDE ONE CLEANOUT MIN. PER 100 FEET OF UNDERDRAIN, AND AT EACH END. SEE STD. PLAN 226.00. MATCH CROWN ELEVATION OF
UNDERDRAIN TO OVERFLOW PIPE UNLESS OTHERWISE SPECIFIED.
5. 18' MIN. BIORETENTION SOIL MIX ON BOTTOM AND SIDES TO TOP OF PONDING AREA. BIORETENTION SOIL MIX TO MEET STD. PLAN 262.60.
6. UNDERDRAIN AGGREGATE TO MEET STD. PLAN 262.60.
7. ARBORIST WOOD CHIP MULCH TO MEET STD. PLAN 262.60.
8. MAXIMUM LONGITUDINAL SLOPE (ALONG DIRECTION OF FLOW) OF BIORETENTION SWALES SHALL BE 6%.
9. WHERE NOT CONFLICTING WITH REQUIRED CLEARANCES OR UTILITIES, TREES MAY BE LOCATED IN BIORETENTION. REDUCE BOTTOM WIDTH TO 6 INCHES
MINIMUM AND INCREASE SIDE SLOPE TO 1.511:1V ADJACENT TO TREE. TREES TO BE LOCATED ONLY OUTSIDE OF LINER FOR LINED FACILITIES.
GENERAL NOTES:
1. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT CITY STANDARDS STD. FLANS 265.00 265.10 AND 265.20 AND
OTHER UTILITY PROVIDER REQUIREMENTS. COORDINATE WITH CITY ENGINEER IN THE EVENT OF UTILITY CROSSINGS OR CONFLICTS.
2. BSM PLACEMENT, GRADING, AND CONSOLIDATION SHALL NOT OCCUR WHEN THE BSM IS EXCESSIVELY WET OR HAS BEEN SUBJECTED TO MORE THAN
112" OF PRECIPITATION WITHIN 48 HOURS PRIOR TO PLACEMENT. EXCESSIVELY WET IS DEFINED AS BEING AT OR ABOVE 22% SOIL MOISTURE BY A
GENERAL TOOLS AND INSTRUMENTS DSMM50D PRECISION DIGITAL SOIL MOISTURE METER WITH PROBE (OR EQUIVALENT). THERE SHOULD BE NO
VISIBLE FREE WATER IN THE MATERIAL. THE CONTRACTOR SHALL PLACE BSM LOOSELY WITH A CONVEYOR BELT OR WITH AN EXCAVATOR OR LOADER
FROM A HEIGHT NO HIGHER THAN 6 FEET, UNLESS OTHERWISE APPROVED BY THE ENGINEER (I.E., DO NOT DUMP MATERIAL DIRECTLY FROM TRUCK
INTO CELL). COMPACT BSM USING NON -MECHANICAL COMPACTION METHODS (E.G., BOOT PACKING, HAND TAMPING, OR WATER CONSOLIDATION) TO
83% (3 2%) OF THE MAXIMUM DRY DENSITY PER MODIFIED PROCTOR TEST (ASTM D1557), OR AS DIRECTED BY THE ENGINEER.
3. SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
UNLESS OTHERWISE NOTED, DRAWING 15 NOT TD SCALE (NTS)
STD. PLAN - 262.10
�s PUBLIC WORKS BIORETENTION SECTION PPR D:
"` DEPARTMENT (WITH UNDERDRAIN) GAZ 9/28/2018 I
verk,adn�,aar,.0 DATE
:45 AN
BIORETENTION SECTION W/ UNDERDRAIN
C6.7 NTS
DocuSign Envelope ID: 6EEC F5B6-602A-4E4A-B436-A317AA638878
_ _ _ _ PLANTING ZONES, - _ _ _ _ _
SEE BELOW �I
II I I ar•^✓�'3 I
I I I I I I
2"4• DEPTH ARBORIST I I I I I
WOOD CHIP MULCH,
SEE STD. PLAN 262.60 BOTTOM WIDTH SIDE SLOPE AT
MIN. 18' TREE, SEE NOTE 1
ROADWAY
- -SIDEWALK OR LANDSCAPING
2"-1 Z' PONDING
DE+yP-T.HH
TRANSITION ZONE SOIL \ \ 4 :k,' `J,r�-:' ,� '�,E ;.,y,;�
SEE STD. PLAN 262.20[=� 4 - 6'-MIN. "' = 1 L;•',�`��. �'.
BIORETENTION SOIL MIX, ?'F' .e .7 -•ti �.,'ni- ,,nrM
SEE STD. PLAN 262.60
SCARIFIED AND UNCOMPACTED SUBGRADE
NOTES:
1. WHERE NOT CONFLICTING WITH REQUIRED CLEARANCES OR UTILITIES, TREES MAY BE LOCATED IN BIORETENTION. REDUCE
BOTTOM WIDTH TO 6" MIN. AND INCREASE SIDE SLOPE TO 1.SH:1V ADJACENT TO TREE. TREES TO BE LOCATED ONLY OUTSIDE OF
LINER FOR LINED FACILITIES.
GENERAL NOTES:
1. ALL PLANTS SHALL BE SELECTED WITH A MAXIMUM MATURE HEIGHT NOT GREATER THAN 30-INCHES ABOVE THE TOP OF THE
FACILITY, WITH THE EXCEPTION OF TREES AND ACCENT SHRUBS.
2. SEE STD. PLANS 262.00, 262.10, AND 262.20 FOR SECTION VIEWS OF SIORETENTION FACILITIES.
3. SEE THE CITY OF RENTON SURFACE WATER DESIGN MANUAL (RENTON SWDM) TABLE C2.6A FOR A SELECTION OF
APPROVED WATER TOLERANT PLANTS. ADDITIONAL SPECIES ARE ALLOWED WITH CITY APPROVAL.
4. SELECT A MINIMUM OF 50% EVERGREEN PLANTS.
5. PLANTS ADJACENT TO STREET, DRIVEWAY, OR SIDEWALK SHALL BE SELECTED AND SPACED TO ALLOW ACCESS TO
VEHICLES AND NOT IMPEDE PEDESTRIANS.
6. PLANTS SHALL BE SPACED TO ENSURE CLEAR ACCESS AND UNIMPEDED FLOW FROM INLETS, OUTLETS, AND OVERFLOWS.
7. CONTINUE MULCH FOR A MINIMUM OF 2-FEET PAST THE TOP OF BANK ELEVATION OR INSTALL LANDSCAPE EDGING IF
FACILITY IS ADJACENT TO TURF.
B. PLANTING DESIGN SHOULD MINIMIZE COMPACTION OF BIORETENTION SOIL MIX THROUGH PLANNED MAINTENANCE ACCESS.
ANNUAL PLANTS REQUIRING SOIL DISTURBANCE FOR HARVESTING (E.G.. CARROTS) OR ANNUAL REPLANTING ARE NOT
PERMITTED,
9. SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
TABLE. PLANTING ZONES
ZONE
PLANT TYPE
LOCATION
EMERGENTS, PERENNIALS 8 LOW SHRUBS (PLANTS
O
THAT CAN TOLERATE STANDING WATER)
FACILITY BOTTOM
PERENNIALS 8 LOW SHRUBS (PLANTS
OEMERGENTS,
`Z
THAT CAN TOLERATE OCCASIONAL STANDING
LOWER SLOPE TO TOP OF PONDING
WATER)
OGROUNDCOVERS
I SHRUBS
UPPER SLOPE / SIDEWALK GRADE
OOO
APPROPRIATE SHRUB
ACCENT SHRUBBASEL)
SIDEWALK GRADE /LOWER SLOPE !FACILITY BOTTOM
ON ZONE)
OTREE
UPPER SLOPE, SEE NOTE 1
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
STD. PLAN - 262.50
.� PUBLIC WORKS BIORETENTION PLANTING - APPR M D:
DEPARTMENT SECTION VIEW GAZ 9/28/2018 1
�rwo,k,aamnxr„..r DATE
BIORETENTION PLANTING
.45 AN
6" MIN., SEE TOP OF BANK
NOTE 1 ELEVATION
CONCRETE CURB, SEE STD. PLAN 101 6" MIN.
1' FREEBOARD
2% ISTREET J
� TOP OF PONDING
IT
III --III Is. 1
`\
TRANSITION ZONE SOIL, SEE NOTES 2 AND 3 1
2'4" DEPTH ARBORIST WOOD CHIP MULCH, SEE STD. PLAN 262.60 /
BIORETENTION SOIL MIX, SEE NOTE 4 J
BIORETENTION ADJACENT TO CURB
6" MIN., SEE
NOTE 1
SIDEWALK DRIVEWAY, OR
6" MIN. 1' DRIVING SURFACE
FREEBOARD 2%
TOP OF PONDING `-
/ a.' I-II6" I-11
- TRANSITION ZONE SOIL, SEE NOTES 2 AND 3
:•-;' - 2"4' DEPTH ARBORIST WOOD CHIP MULCH, SEE STD. PLAN 262.60
BIORETENTION SOIL MIX, SEE NOTE 4
BIORETENTION ADJACENT TO SIDEWALK, DRIVEWAY, OR
DRIVING SURFACE WITH FLUSH OR NO CURB
NOTES:
1. SHOULDER/LEVEL AREA WIDTH TO BE 6-INCH MIN. IN AREAS WITHOUT PARKING. PLANTINGS ADJACENT TO PARKING SHALL BE
SELECTED AND SPACED TO ALLOW ACCESS TO VEHICLES.
2. COMPACT TRANSITION ZONE SOIL IMMEDIATELY BEHIND CURB TO 90%MAX. STANDARD PROCTOR DENSITY (ASTM D698).
3. TRANSITION ZONE SOIL SHALL BE BIORETENTION SOIL MIX OR AMENDED SOIL PER GENERAL NOTE 1.
4. 18" MINIMUM BIORETENTION SOIL MIX PER STD. PLAN 262.60 TO TOP OF PONDING DEPTH.
GENERAL NOTES:
1. SOIL AMENDMENT: SCARIFY OR TILL SUBGRADE TO 3-INCH DEPTH. PLACE 3-INCHES OF TOPSOIL ON SURFACE AND TILL INTO
5-INCHES OF SITE SOIL. SCARIFICATION DOES NOT APPLY TO LINED FACILITIES. TOPSOIL SHALL HAVE A MINIMUM ORGANIC
MATTER CONTENT OF 10% DRY WEIGHT IN PLANTING BEDS AND 5% IN TURF AREAS. AND A PH FROM 6.0 TO &0 OR MATCHING
THE PH OF THE ORIGINAL UNDISTURBED SOIL.
2. SEE STD. PLAN 262.30 FOR CURB CUTS.
3. FOR FACILITIES WITH LINERS, PROVIDE LINER ANCHOR PER WSDOT SPECIFICATIONS B-29.3(2).
4. SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
UNLESS OTHERWISE NOTED, DRAWING IS NOT TD SCALE (NTS)
STD. PLAN - 262.20
[1,R)
PUBLIC WORKS APPROVED:
1, DEPARTMENT BIORETENTION - EDGE TREATMENTS GAZ 9/28/2018 I
vmk,adnmia„,v DATE
BIORETENTION - EDGE TREATMENTS
6.7 NTS
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
UNDERDRAIN AGGREGATE
TABLE: UNDERDRAIN AGGREGATE GRADATION
SIEVE SIZE
3M-INCH
PERCENT PASSING
10O PERCENT
1/4-INCH
30 TO 60 PERCENT
U.S. NO.8
20 TO 50 PERCENT
U.S. NO. 50
3 TO 12 PERCENT
U.S. NO. 200
0 TO 1 PERCENT
UNDERDRAIN AGGREGATE MUST CONSIST OF SCREENED SAND, GRAVEL OR OTHER INERT MATERIALS, OR COMBINATIONS
THEREOF, FROM SOURCES APPROVED BY THE ENGINEER, HAVING HARD, DURABLE PARTICLES FREE FROM ADHERENT
COATINGS. THE MATERIALS MUST BE WASHED THOROUGHLY TO REMOVE CLAY, LOAM, ALKALI, ORGANIC MATTER, OR OTHER
DELETERIOUS SUBSTANCES. PARTICLES HAVING A SPECIFIC GRAVITY LESS THAN 1.95 MUST NOT EXCEED 1.0 PERCENT OF
THE TOTAL WEIGHT. ORGANIC MATTER, BY CALORIMETRIC TEST, MUST NOT BE DARKER THAN THE REFERENCE STANDARD
COLOR (ORGANIC PLATE NO. 3) AASHTO T21 UNLESS OTHER TESTS PROVE A DARKER COLOR TO BE HARMLESS.
BIORETENTION SOIL MIX
BIORETENTION SOIL MIX (BSM) SHALL BE A WELL -BLENDED HOMOGENEOUS MIXTURE OF 60 TO 65 PERCENT BY VOLUME MINERAL
AGGREGATE FOR BIORETENTION SOIL AND 35 TO 40 PERCENT BY VOLUME COMPOST AS DETAILED IN THE TABLES BELOW.
MINERAL AGGREGATE FOR BIORETENTION SOIL
TABLE: MINERAL AGGREGATE GRADATION
SIEVE SIZE
PERCENT PASSING
318-INCH
100 PERCENT
U.S. NO. 4
95 TO 100 PERCENT
U.S. NO. 10
75 TO 90 PERCENT
U.S. NO. 40
25 TO 40 PERCENT
U.S. NO. 100
4 TO 10 PERCENT
U.S. NO. 200
2 TO 4 PERCENT
MINERAL AGGREGATE FOR BIORETENTION SOIL MUST BE FREE OF WOOD
WASTE, COATING, OR ANY OTHER DELETERIOUS MATERIAL, AND ALL
AGGREGATE PASSING THE NO. 200 SIEVE SIZE MUST BE NON -PLASTIC.
MINERAL AGGREGATE MUST BE ANALYZED BY AN ACCREDITED LAB USING
THE SIEVE SIZES NOTED IN THE TABLE TO THE LEFT, AND MUST MEET THE
REQUIRED GRADATIONS.
COMPOST
TABLE: COMPOST GRADATION
SIEVE SIZE
MIN. PERCENT PASSING
2-INCH
100 PERCENT
1-INCH
99 PERCENT
5/8-INCH
90 PERCENT
114-INCH
75 PERCENT
COMPOST MUST ORIGINATE A MINIMUM 65 PERCENT BY VOLUME FROM
RECYCLED PLANT WASTE COMPRISED OF YARD DEBRIS, CROP RESIDUES,
AND BULKING AGENTS, AND MEET THE DEFINITION OF "COMPOSTED
MATERIAL" IN WAC 173-35D-100. COMPOST SHALL HAVE A MOISTURE CONTENT
THAT HAS NO VISIBLE FREE WATER OR DUST PRODUCED WHEN HANDLING
THE MATERIAL. COMPOST SHALL HAVE AN ORGANIC MATTER CONTENT OF 40
PERCENT TO 65 PERCENT BY DRY WEIGHT, A CARBON TO NITROGEN RATIO
BELOW 25:1, AND A PH BETWEEN 6.0 AND 8.0
ABORIST WOOD CHIP MULCH
TABLE: AR13ORIST WOOD CHIP MULCH GRADATION
SIEVE SIZE
PERCENT PASSING
6-INCH
100 PERCENT
2-INCH
95 TO 100 PERCENT
1-INCH
70 TO 100 PERCENT
518-INCH
0 TO 50 PERCENT
U.S. NO. 4
0 TO 30 PERCENT
ARBORIST WOOD CHIP MULCH SHALL BE COARSE GROUND WOOD
CHIPS (APPROXIMATELY 1/2" TO T ALONG THE LONGEST DIMENSION)
DERIVED FROM THE MECHANICAL GRINDING OR SHREDDING OF THE
ABOVE -GROUND PORTIONS OF TREES. IT MAY CONTAIN WOOD, WOOD
FIBER, BARK, BRANCHES, AND LEAVES, BUT MAY NOT CONTAIN
WEEDS. WEED SEEDS, OR VISIBLE AMOUNTS OF SOIL.
UNLESS OTHERWISE NOTED, DRAWING 15 NOT TO SCALE (NTS)
UNDERDRAIN AGGREGATE, [PROVID: STD. PLAN-262.60
DEPARTMENT GAZ
PUBLIC WORKS BIORETENTION SOIL MIX, AND MULCH 9/28/2018 1
SPECIFICATIONS
vork,aa,n.ay,".0 DATE
QIr1QCTCA1TIr1A1 Ann /G�r111 1► AIY C+�CnC+
NTS C6.7 NTS
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ENGINEERING PLLC
321 3rd Ave South, Suite 406
Seattle, Washington 98104
ph 206.596.7115
J coterraengineering.com
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MATCH
GUTTER
MATCH
CURB
WIDTH
WIDTH
11
' �•
12" MIN.
STREAMBED
6" COBBLES.
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.
SEE NOTE 2
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-6" MIN.
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• 6' MIN.
APE•R UTTER AT CUR13 CUT TO MATCH
GUTTER SLOPE UPSLOPE AND
DOWNSLOPE OF CURB CUT
PLAN
T GUTTER DEPRESSION
AT FLOWLINE
GUTTER UPSLOPE AND TYPICAL SIDE SLOPE
DOWNSLOPE OF CURB CUT
- - - - - 2"-4" ARBORIST WOOD CHIP
SLOPE �2.5
MULCH SEE STD. PLAN 262.60
INFLOW 6" MIN. FREEBOARD ��1 V
ROADWAY ° \
e • �
1" DROP TO COBBLES 8' 18"
�
_ ¢ 1
�l' f.1'%�.'•.'^;1'-d"� � X: :.-4'=� `T„f1 ., 1 ,•
4'CRUSHED SUkFACING �\ , �, ti_• 11 1,d, L,
TOP COURSE �-z-E. ^Y.cI �,,, BIORETENTION FACILITY-,
COMPACT SOIL BELOW4,,,);
COBBLES SEE NOTE 4 // // // �- J' ~ Tg •Cs r-,S_u. .'i_ P >`1 -`
\j\\j\\j\/ 8"MIN.
~i
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NOTES: SECTION A UNCOMPACTED BIORETENTION SOIL I
MIX (BSM), SEE STD. PLAN 262.60
1. SEE STD. PLAN 262.20 FOR EDGE TREATMENT OUTSIDE INLET AREA.
2. INLET CURB CUT WIDTH SHALL BE 24' ON GUTTER SLOPES 2 5%AND 18" ON GUTTER SLOPES, 5%.
3. STREAMBED COBBLES SHALL BE 6" COBBLES PER WSDOT 9-03.11(2). COBBLE PAD TO BE 8' THICK, WITH 1:1 SIDE SLOPES, TAPERING TO 12"
WIDE AT FACILITY BOTTOM.
4. COMPACT BIORETENTION SOIL MIX UNDER COBBLES TO 90% MAX STANDARD PROCTOR DENSITY (ASTM D698).
GENERAL NOTES:
1. BOND NEW CURB AND GUTTER TO EXISTING CURB AND GUTTER WITH EPDXY AND DOWEL CONNECTION, IF RETROFITTING INTO EXISTING
CURBLINE. REFER TO STD. PLAN 101.10 FOR EXPANSION JOINT DETAIL.
2. SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
UNLESS OTHERWISE NOTED, DRAWING IS NOTTD SCALE (NTS)
STD. PLAN - 262.30
• PUBLIC WORKS BIORETENTION - CURB CUT INLETS PPR D.
DEPARTMENT GAZ 9/28/2018 I
vmk,Adnnia DATE
BIORETENTION - CURB CUT INLETS
NTS
8" CLEANOUT
:45 AM
PRE-TREATMENT CELL
18.2'
CAST IRON BEEHIVE GRATE
AND FRAME, SEE NOTE 1 -
OPTIONAL W OR 8" STREAMBED COBBLES,
PER WSDOT 9-03.11(2), SEE NOTE 2 -
SEE NOTE 3-
VARIES , 5 MAX.
I
SEE NOTE = ITYP.j
STORM DRAIN PIPE,
DESIGNER TO SPECIFY
6" MIN. -
6" MIN.
6' MIN. -1 F
12" MIN. SUMP
CATCH BASIN ADJUSTMENT SECTION AS
REQUIRED, DESIGNER TO SPECIFY ELEVATION
DESIGN PONDING
ELEVATION
UNDERDRAIN PIPE, IF REQUIRED,
SEE STD. PLAN 262.10
CATCH BASIN TYPE 1 PER
STD. PLAN 200.00 OR OTHER
STRUCTURE WITH APPROVAL
CONCRETE BASE
GRAVEL BACKFILL FOR DRAINS
COMPACT PER WSDOT STD. SPEC. 9-03.12 4
NOTES:
1. FRAME AND GRATE SHALL BE LOCKING AND GRATE SHALL BE BOLTED TO FRAME. FRAME SHALL CONFORM TO WSDOT STANDARD PLAN
8-30.10-01. GRATE TO BE DUCTILE IRON BEEHIVE GRATE FITTING 20"x24" FRAME. OLYMPIC FOUNDRY PART SM60BH OR EQUAL. SEE
STANDARD SPECIFICATIONS 9-05.15(2) .
2. MINIMUM STREAMBED COBBLE DIAMETER SHALL BE LARGER THAN MAXIMUM GRATE OPENING.
3. ALL GRADE RINGS AND CASTINGS SHALL BE SET IN MORTAR IN ACCORDANCE WITH STANDARD SPECIFICATION 9-04.3. THEN APPLY
MORTAR TO INSIDE AND OUTSIDE OF ALL JOINTS, RINGS, RISERS, AND FRAMES,
4. WHEN CONNECTING TO A NEW PIPE, USE A FLEXIBLE CONNECTOR (KOR-N-SEAL BOOT WITH CORRUGATED PIPE ADAPTER OR APPROVED
EQUAL). WHEN CONNECTING TO AN EXISTING PIPE. USE A FABRICATED SAND COLLAR OF THE SAME MATERIAL AS THE CONNECTING PIPE.
GENERAL NOTES:
1. PLANT SPACING WITHIN FACILITY TO ALLOW MAINTENANCE ACCESS TO STRUCTURE.
2. 12-INCH MIN. CLEARANCE WITHIN OVERFLOW STRUCTURE SHALL BE PROVIDED FOR MAINTENANCE ACCESS.
3. OVERFLOW PIPES MUST BE LOCATED AT AN ELEVATION HIGHER THAN THE STORM DRAIN HYDRAULIC GRADE LINE TO PREVENT BACKFLOW
INTO THE BIORETENTION FACILITY,
4. OVERFLOW STRUCTURE SHALL BE LOCATED WITHIN 10 FEET OF ROAD EDGE FOR MAINTENANCE ACCESS, UNLESS APPROVED OTHERWISE.
OVERFLOW STRUCTURE MAY BE LOCATED IN SIDE SLOPES.
S. SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
UNLESS OTHERWISE NOTED, DRAWING 15 NOT TD SCALE (NTS)
STD. PLAN - 262.40
��• PUBLIC WORKS BIORETENTION - OVERFLOW OUTLET [PPRRED:
"` DEPARTMENT STRUCTURE GAZ 9/28/2018 1
wmk,aen,neo-"mr DATE
:45 AN
J
BIORETENTION - OVERFLOW OUTLET STRUCTURE Q
NTS
TREATMENT CELL
36.4'
NOTES:1. DO NOT COMPACT SUBGRADE. SCARIFY P1Q0N $1FNU'SOIEW
RECORD DRAWING
THE INFORMATION ON THIS DRAWING
INDICATES CHANGES MADE TO THE
CONSTRUCTION DOCUMENTS BASED UPON
BIORETENTION SWALE LONGITUDINAL SE BUILT SURVEY PREPARED BY
TPO
NTS INC., DATED 12/10/21, AND
TRANSFERRED TO THE REPRODUCIBLE
DRAWINGS BY THE ENGINEER.
SURVEYED: SCALE:
1"=20' VERTICAL CITY O F
HORIZONTAL- NAD AD 1983/183/1991 c
DESIGNED: HS
DRAWN: HS - RENTON
ONE INCH DATU M
CHECKED: PA AT FULL SCALE Planning/Building/Public Works Dept.
IF NOT ONE INCH
NO. REVISION BY DATE A P P R APPROVED: SCALE ACCORDINGLY
:45 AN
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RIM ELEV: 340.28 7
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340.03
L-
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\ ELEV. 338.53
TOP OF 8" UNDERDRAIN PIPE: 338.36
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8" UNDERDRAIN IE:337.70/r^J
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BOTTOM OF UNDERDRAIN AGGREGATE 337.53
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EX 18" SD PIPE
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RELOCATE AND REUSE EX TYPE 1 - CATCH BASIN
ADJUST RIM AND INVERT PER PLAN \
REPLACE EX GRATE W/ BEEHIVE GRATE
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CITY OF RENTON CML DETAILS
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