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DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
MATCH
I� GUTTER
I WIDTH
° d
°
�e 4
MATCH
CURB
WIDTH
T
}
6„
12" MIN.
b
6"
JAPER, (TYP.) °
d
18"-24
DESIGNER
TO SPECIFY,
d
SEE NOTE 2
° MFLOW d
°
.
d
d
tl I
74
T-6" MIN. , Q C
STREAMBED
COBBLES,
SEE NOTE 3
TAPER GUTTER AT CURB CUT TO MATCH
GUTTER SLOPE UPSLOPE AND
DOWNSLOPE OF CURB CUT
PLAN
2" GUTTER DEPRESSION
AT FLOWLINE
GUTTER UPSLOPE AND
DOWNSLOPE OF CURB CUT
SLOPE
�J\ INFLOW
ROADWAY
1" DROP TO COBBLES
4" CRUSHED SURFACING \
TOP COURSE
12"
TYPICAL SIDE SLOPE
- - - 2%4" ARBORIST WOOD CHIP
2.5 MULCH, SEE STD. PLAN 262.60
6" MIN. FREEBOARD 1 17
IN N
COMPACT SOIL BELOW
COBBLES, SEE NOTE 4
0 8" � \ � 18"
BIORETENTION FACILITY��k _
i -
%, \ 1 :p, �_ i' i� 18"MIN.
Y
---
UNCOMPACTED BIORETENTION SOIL
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 >- 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 NOT TO SCALE (NTS)
STD. PLAN - 262.30
V'RI
PUBLIC WORKS BIORETENTION - CURB CUT INLETS PPR D 9/28/2018 1
DEPARTMENT GAZ
P"brc Work: Admm,,nzror DATE
BIORETENTION - CURB CUT INLETS
NTS
:45 AM
NW 1/4 OF NW 1/4 & THE NE 1/4 OF NW 1/4 SEC 9, TWN 23 N, RGE05E,W.M.
DocuSign Envelope ID: A9707D3B-AOEF-441 F-8140-2CDB48E878CA
CAST IRON BEEHIVE GRATE
AND FRAME, SEE NOTE 1 -
OPTIONAL 6" OR 8" STREAMBED COBBLES,
PER WSDOT 9-03.11(2), SEE NOTE 2
SEE NOTE 3 -
VARIES, 5' MAX.
I
SEE NOTE 4 (TYP.)
STORM DRAIN PIPE,
DESIGNER TO SPECIFY
6" MIN.
6" MIN.
6" MIN.
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
B-30.10-03. 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.
5. SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
STD. PLAN - 262.40
VRI
%PUBLIC WORKS BIORETENTION - OVERFLOW OUTLET
DEPARTMENT STRUCTURE Martin Pastucha 11/2/2
P"bk8kY9AJFD98B449D... DATE
BIORETENTION - OVERFLOW OUTLET
• Call 811
• • two business days
before you dig
2 CIVIL CONSTRUCTION PERMIT - 3RD SUBMITTAL
1 CIVIL CONSTRUCTION PERMIT - 2ND SUBMITTAL
0 CIVIL CONSTRUCTION PERMIT
NO. REVISION
NTS
SURVEYED:
ZILN
DESIGNED:
MDR
JSF
12/8/2025
JSF
JSF
08/31/2025
JSF
DRAWN: RAG
MDR
05/27/2024
JSF
CHECKED:
MNF
BY
DATE
APPR
APPROVED:
JSF
ONE INCH
AT FULL SCALE
IF NOT ONE INCH
SCALE ACCORDINGLY
20
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
_ , _ _ _ _ _ _ _ _ _ _ _ _ - PLANTING ZONESI, J
T SEE BELOW
I
I 0 10 1 10 1 3 I
I I I I I I
74" DEPTH ARBORIST 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"-12" PONDING -I � - -
DEPTH
III-1 I-1 l-1 i i I-1 EE I I-T
1 15 a
TRANSITION ZONE SOIL,
SEE STD. PLAN 262.20 . s-• - -.� .6" MIN.-"y<=°at'r
\\ +. f.
18" IN.,
BIORETENTION SOIL MIX,
SEE STD. PLAN 262.60
NOTES: SCARIFIED AND UNCOMPACTED SUBGRADE
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 1.5HA V 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 BIORETENTION FACILITIES.
3. SEE THE CITY OF RENTON SURFACE WATER DESIGN MANUAL (RENTON SWDM) TABLE C.2.6.A 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.
8. 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
PERENNIALS & LOW SHRUBS (PLANTS
0)EMERGENTS,
THAT CAN TOLERATE STANDING WATER)
FACILITY BOTTOM
PERENNIALS & LOW SHRUBS (PLANTS
OEMERGENTS,
'L
THAT CAN TOLERATE OCCASIONAL STANDING
LOWER SLOPE TO TOP OF PONDING
WATER)
OGROUNDCOVERS
/ SHRUBS
UPPER SLOPE / SIDEWALK GRADE
0)O O
SHRUB
ACCENT SHRU BASED
SIDEWALK GRADE / LOWER SLOPE / FACILITY BOTTOM
ON ZONE)APPROPRIATE
OTREE
UPPER SLOPE, SEE NOTE 1
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
STD. PLAN - 262.50
PUBLIC WORKS BIORETENTION PLANTING - APPRED:
PR DEPARTMENT GAZ 9/28/2018
SECTION VIEW
Public Works Administrator DATE
BIORETENTION PLANTING
S.
cF WASgI
Iq
o
39847 1601 5th Avenue, Suite 1600
9A ��'-ISTEg�� ��`�4 Seattle, WA 98101
�SSIONAL E��l 206.622.5822
12/09/2025 www•kpff.com
CITY OF
RENTON
Planning/Building/Public Works Dept.
NTS
:45 AN
R-436329
IN COMPLIANCE WITH CITY OF RENTON STANDARDS
DEVELOPMENT ENGINEERING
HBray 12/31 /2025
SOLERA TOWNHOMES
2842 NE SUNSET BLVD
RENTON, WA 98056
STORM DETAILS
DATE:
05/30/202
PAGE:
DRAWING NO:
C6.31
SHEET:OF:
29 55
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