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12" MIN.
LEVEL BOTTOM
2' MIN.
SWALE SPACING DEPENDS ON SLOPE GRADIENT
2
2 MAX.
MAX.
�1 1F
1. CONDITIONS OF USE
1.1. REQUIRED AT:
1.1.1. THE TOP OF ALL SLOPES IN EXCESS OF 3HAV AND WITH MORE THAN 20 FEET OF VERTICAL RELIEF.
1.1.2. AT INTERVALS ON ANY SLOPES THAT EXCEEDS THE DIMENSIONS SPECIFIED BELOW.
AVERAGE SLOPE
SLOPE PERCENT
FLOW PATH LENGTH
20HAV (OR LESS)
3-5%
300 FEET
(10 TO 20)H:1V
5-10%
200 FEET
(4 TO 10)HAV
10-25%
100 FEET
(2 TO 4)H:1V
25-50%
50 FEET
2. DESIGN AND INSTALLATION SPECIFICATIONS
2.1. FOR SLOPES STEEPER THAN 2HA V WITH MORE THAN 10 FEET OF VERTICAL RELIEF, BENCHES MAY BE CONSTRUCTED OR CLOSER SPACED
INTERCEPTOR SWALES MAY BE USED. THE DESIRED MEASURE MUST BE DESIGNED BY AN ENGINEER TO EFFECTIVELY INTERCEPT THE HIGH VELOCITY
RUNOFF TO A SEDIMENT POND OR TRAP.
2.2. CONSTRUCTION TRAFFIC OVER TEMPORARY SWALES SHALL BE MINIMIZED.
3. MAINTENANCE STANDARDS
3.1. DAMAGE RESULTING FROM RUNOFF OR CONSTRUCTION ACTIVITY SHALL BE REPAIRED IMMEDIATELY.
3.2. IF THE FACILITIES DO NOT REGULARLY RETAIN STORM RUNOFF, THE CAPACITY AND/OR FREQUENCY OF THE SWALES SHALL BE INCREASED.
UNLESS OTHERWISE NOTED, DRAWING IS NOTTO SCALE (NTS)
STD. PLAN - 217.10
PRIPUBLIC WORKS INTERCEPTOR SWALE PPR o.9/28/2018 DEPARTMENT GAZ
Public Works Administrator DATE
INTERCEPTOR SWALE
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
TOE IN
4" x 4"
NOTES:
1. CONDITIONS OF USE
1.1. PLASTIC COVERING MAY BE USED ON DISTURBED AREAS THAT REQUIRE COVER MEASURES FOR LESS THAN 30 DAYS.
1.2. PLASTIC IS PARTICULARLY USEFUL FOR PROTECTING CUT AND FILL SLOPES AND STOCKPILES.
1.3. CLEAR PLASTIC SHEETING MAY BE USED OVER NEWLY -SEEDED AREAS TO CREATE A GREENHOUSE EFFECT AND ENCOURAGE GRASS GROWTH.
CLEAR PLASTIC SHOULD NOT BE USED FOR THIS PURPOSE DURING THE SUMMER MONTHS.
1.4. THIS METHOD SHALL NOT BE USED UPSLOPE OF AREAS THAT MIGHT BE ADVERSELY IMPACTED BY RUNOFF. SUCH AREAS INCLUDE STEEP AND
UNSTABLE SLOPES.
2. DESIGN AND INSTALLATION SPECIFICATIONS
2.1. PLASTIC SHEETING SHOULD HAVE A MINIMUM THICKNESS OF 0.06 MILLIMETERS.
2.2. IF EROSION AT THE TOE OF A SLOPE IS LIKELY, A GRAVEL BERM, RIPRAP, OR OTHER SUITABLE PROTECTION SHALL BE INSTALLED AT THE TOE
OF THE SLOPE IN ORDER TO REDUCE THE VELOCITY OF RUNOFF.
2.3. TIRES, SAND BAGS, OR EQUIVALENT MAY BE USED TO WEIGHT PLASTIC.
2.4. SEAMS BETWEEN SHEETS MUST OVERLAP A MINIMUM OF 12 INCHES AND BE WEIGHTED OR TAPED.
3. MAINTENANCE STANDARDS
3.1. TORN SHEETS MUST BE REPLACED AND OPEN SEAMS REPAIRED.
3.2. IF THE PLASTIC BEGINS TO DETERIORATE DUE TO ULTRAVIOLET RADIATION, IT MUST BE COMPLETELY REMOVED AND REPLACED.
3.3. WHEN THE PLASTIC IS NO LONGER NEEDED, IT SHALL BE COMPLETELY REMOVED.
UNLESS OTHERWISE NOTED, DRAWING IS NOTTO SCALE (NTS)
STD. PLAN - 213.30
PUBLIC WORKS PRO
DEPARTMENT PLASTIC COVERING GAZ 9/28/2018
Pubtm Woks Admmanatnr DATE
PLASTIC COVERING
:45 AM
NTS
:45 AN
NTS
0
Tall
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
T-30'. SEE NOTE 2.3
EDIMENT, ORGANIC MATTER,
ND NATIVE SEEDS ARE
APTURED BEHIND THE ROLLS
STRAW ROLLS MUST BE
PLACED ALONG SLOPE
CONTOURS
JACENT ROLLS SHALL
HTLY ABUT
WOODEN STAKE
LIVE STAKE
10" DIA.
1. CONDITIONS OF USE
1A. INSTALL ON DISTURBED AREAS THAT REQUIRE IMMEDIATE EROSION PROTECTION.
1.2. USE ON SLOPES REQUIRING STABILIZATION UNTIL PERMANENT VEGETATION CAN BE ESTABLISHED.
1.3. CAN BE USED ALONG THE PERIMETER OF A PROJECT, AS A CHECK DAM IN UNLINED DITCHES AND AROUND TEMPORARY STOCKPILES.
1.4. WATTLES CAN BE STAKED TO THE GROUND USING WILLOW CUTTINGS FOR ADDED REVEGETATION.
1.5. RILLING CAN OCCUR BENEATH AND BETWEEN WATTLES IF NOT PROPERLY ENTRENCHED, ALLOWING WATER TO PASS BELOW AND BETWEEN WATTLES.
2. DESIGN AND INSTALLATION SPECIFICATIONS
2.1. IT IS CRITICAL THAT WATTLES ARE INSTALLED PERPENDICULAR TO THE FLOW DIRECTION AND PARALLEL TO THE SLOPE CONTOUR.
2.2. NARROW TRENCHES SHOULD BE DUG ACROSS THE SLOPE, ON CONTOUR, TO A DEPTH OF 3 TO 5 INCHES ON CLAY SOILS AND SOILS WITH GRADUAL SLOPES.
ON LOOSE SOILS, STEEP SLOPES, AND DURING HIGH RAINFALL EVENTS, THE TRENCHES SHOULD BE DUG TO A DEPTH OF 5 TO 7 INCHES, OR 1/2 TO 2/3 OF THE
THICKNESS OF THE WATTLE.
2.3. START CONSTRUCTION OF TRENCHES AND INSTALLING WATTLES FROM THE BASE OF THE SLOPE AND WORK UPHILL. EXCAVATED MATERIAL SHOULD BE
SPREAD EVENLY ALONG THE UPHILL SLOPE AND COMPACTED USING HAND TAMPING OR OTHER METHOD. CONSTRUCT TRENCHES AT CONTOUR INTERVALS
OF 3 TO 30 FEET APART DEPENDING ON THE STEEPNESS OF THE SLOPE, SOIL TYPE, AND RAINFALL. THE STEEPER THE SLOPE THE CLOSER TOGETHER THE
TRENCHES SHOULD BE CONSTRUCTED. VERTICAL DISTANCE BETWEEN WATTLES IS NOT TO EXCEED 10 FEET.
2.4. INSTALL THE WATTLES SNUGLY INTO THE TRENCHES AND ABUT TIGHTLY END TO END. DO NOT OVERLAP THE ENDS.
2.5. INSTALL STAKES AT EACH END OF THE WATTLE, AND AT 4 FOOT CENTERS ALONG THE ENTIRE LENGTH OF THE WATTLE.
2.6. IF REQUIRED, INSTALL PILOT HOLES FOR THE STAKES USING A STRAIGHT BAR TO DRIVE HOLES THROUGH THE WATTLE AND INTO THE SOIL.
2.7. AT A MINIMUM, WOODEN STAKES SHOULD BE APPROXIMATELY 3/4 X 3/4 X 24 INCHES. WILLOW CUTTINGS OR 3/8-INCH REBAR CAN ALSO BE USED FOR STAKES.
2.8. STAKES SHOULD BE DRIVEN THROUGH THE MIDDLE OF THE WATTLE, LEAVING 2 TO 3 INCHES OF THE STAKE PROTRUDING ABOVE THE WATTLE.
3. MAINTENANCE STANDARDS
3.1. INSPECT WATTLES PRIOR TO FORECASTED RAIN, DAILY DURING EXTENDED RAIN EVENTS, AFTER RAIN EVENTS, WEEKLY DURING THE WET SEASON, AND AT
TWO WEEK INTERVALS AT ALL OTHER TIMES OF THE YEAR.
3.2. REPAIR OR REPLACE SPLIT, TORN, RAVELING, OR SLUMPING WATTLES
3.3. REMOVE SEDIMENT ACCUMULATIONS WHEN EXCEEDING 1/2 THE HEIGHT BETWEEN THE TOP OF THE WATTLE AND THE GROUND SURFACE.
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
PUBLIC WORKS APPRED:
STD. PLAN - 213.40
144
DEPARTMENT STRAW WATTLES GAZ 9/28/2018
Public Works Administrator DATE
FILTER SOCK
CCP SUBMITTAL #1
REVISION
/10
SURVEYED: 04/01/21
DESIGNED: AD/CH/NW
DRAWN: AD/CH/NW
CHECKED: CM
►_1»:a ... -.
SCALE:
AS SHOWN
ONE INCH
AT FULL SCALE
IF NOT ONE INCH
SCALE ACCORDINGLY
:45 AN
NTS
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991
DATU M
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
4' MIN.
12" OVERFLOW
12" DEPTH 2" - 4" ROCK DEPTH
OUTFLOW CHANNEL IF
24" MIN. SETTLING DEPTH CONSTRUCTED BY
`•>.p _-! 0 EXCAVATION
\ = I 3 9
r 1
3.5' - 5' 5' MAX.
FILTER FABRIC FENCING
1.5' MIN. SEDIMENT STORAGE h 12" DEPTH 3/4"- 1 1/2"
WASHED GRAVEL
CROSS SECTION
i
1. MAY BE CONSTRUCTED BY EXCAVATION OR BY BUILDING A BERM
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UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
STD. PLAN - 211.00
PUBLIC WORKS APPR ED:
fi DEPARTMENT SEDIMENT TRAP GAZ 9/28/2018
v4siv
Public Works Administrator DATE
SEDIMENT TRAP
CITY OF
RENTON
Planning/Building/Public Works Dept.
:45 AN
NTS
R-422010
01 /04/2023
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IN COMPLIANCE WITH CITY OF RENTON STANDARDS J
V
DEVELOPMENT ENGINEERING z
JChavez 01 /31 /2023
ry
DATE:
600 SW 10TH PARKING LOT 08/30/2022
FlELDBOOK:
PAGE:
TEMPORARY EROSION & DRAWING NO: U1
SEDIMENT CONTROL DETAILS C 5020
SHEEP: 10
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