HomeMy WebLinkAboutTED4003203.6A PORTION
.. I OF THE S.W. 1/4 OF SECTION f
STANDARD EROSION CONTROL PLAN NOTES AND SPECIFICATIONS
1, BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE -CONSTRUCTION MEETING MUST BE HELD WITH THE CITY OF RENTON, PUBLIC WORKS DESIGN
ENGINEER.
2. ALL LIMITS OF CLEARING AND AREAS OF VEGETATION PRESERVATION AS PRESCRIBED ON THE PLAN(S) SHALL BE CLEARLY FLAGGED IN THE FIELD AND OBSERVED
DURING CONSTRUCTION.
3. ALL REQUIRED SEDIMENTATION/EROSION CONTROL FACILITIES MUST BE CONSTRUCTED AND IN OPERATION PRIOR TO LAND CLEARING AND/OR CONSTRUCTION TO
ENSURE THAT SEDIMENT LADEN WATER DOES NOT ENTER THE NATURAL DRAINAGE SYSTEM. ALL EROSION AND SEDIMENT FACILITIES SHALL BE MAINTAINED IN A
SATISFACTORY CONDITION UNTIL SUCH TIME THAT CLEARING AND/OR CONSTRUCTION IS COMPLETE AND POTENTIAL FOR ON -SITE EROSION HAS PASSED. THE
IMPLEMENTATION, MAINTENANCE, REPLACEMENT AND ADDITIONS TO EROSION/SEDIMENTATION CONTROL SYSTEMS SHALL BE THE RESPONSIBILITY OF THE PERMITEE,
4, THE EROSION AND SEDIMENTATION CONTROL SYSTEMS DEPICTED ON THIS DRAWING ARE INTENDED TO BE MINIMUM REQUIREMENTS TO MEET ANTICIPATED SITE
CONDITIONS. AS CONSTRUCTION PROGRESSES AND UNEXPECTED OR SEASONAL CONDITIONS DICTATE, THE PERMITEE SHALL ANTICIPATE THAT MORE EROSION AND
SEDIMENTATION CONTROL FACILITIES WILL BE NECESSARY TO ENSURE COMPLETE SILTATION CONTROL ON THE PROPOSED SITE. DURING THE COURSE OF
CONSTRUCTION, IT SHALL BE THE OBLIGATION AND RESPONSIBILITY OF THE PERMITEE TO ADDRESS ANY NEW CONDITIONS THAT MAY BE CREATED BY THE ACTIVITIES
AND TO PROVIDE ADDITIONAL FACILITIES, OVER AND ABOVE MINIMUM REQUIREMENTS, AS MAY BE NEEDED, TO PROTECT ADJACENT PROPERTIES AND WATER QUALITY OF
THE RECEIVING DRAINAGE SYSTEM,
5, APPROVAL OF THIS PLAN IS FOR EROSION/SEDIMENTATION CONTROL ONLY. IT DOES NOT CONSTITUTE AN APPROVAL OF STORM DRAINAGE DESIGN, SIZE NOR
LOCATION OF PIPES, RESTRICTORS, CHANNELS, OR RETENTION FACILITIES,
6, DURING THE TIME PERIOD OF OCTOBER 1ST THROUGH APRIL 30TH, ALL PROJECT DISTRIBUTED SOIL AREAS GREATER THAN 5,000 SQUARE FEET, THAT ARE TO BE LEFT
UN -WORKED FOR MORE THAN 12 HOURS, SHALL BE COVERED BY MULCH, SODDING OR PLASTIC COVERING.
7. IN ANY AREA WHICH HAS BEEN STRIPPED OF VEGETATION AND WHERE NO FURTHER WORK IS ANTICIPATED FOR A PERIOD 30 DAYS OR MORE, ALL DISTURBED AREAS
MUST BE IMMEDIATELY STABILIZED WITH MULCHING, GRASS PLANTING OR OTHER APPROVED EROSION CONTROL TREATMENT APPLICABLE TO THE TIME OF YEAR. GRASS
SEEDING ALONE WILL BE ACCEPTABLE ONLY DURING THE MONTHS OF APRIL THROUGH SEPTEMBER, INCLUSIVE, SEEDING MAY PROCEED, HOWEVER, WHENEVER IT IS IN
THE INTEREST OF THE PERMITEE, BUT MUST BE AUGMENTED WITH MULCHING, NETTING OR OTHER TREATMENT APPROVED BY THE CITY OF RENTON, OUTSIDE THE
SPECIFIED TIME PERIOD,
8. FOR ALL EROSION/SEDIMENTATION CONTROL PONDS WHERE THE DEAD STORAGE DEPTH EXCEEDS 6 INCHES, A FENCE IS REQUIRED WITH A MINIMUM HEIGHT OF THREE
(3) FEET, 3:1 SIDE SLOPES.
9. A TEMPORARY GRAVEL CONSTRUCTION ENTRANCE, 24 FEET X 50 FEET X 8 INCHES OF 4 TO 6 INCH QUARRY SPALLS SHALL BE LOCATED AT ALL POINTS OF
VEHICULAR INGRESS AND EGRESS TO THE CONSTRUCTION SITE.
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WET SEASON SPECIAL PROVISIONS
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1. THE ALLOWED TIME THAT A DISTURBED AREA CAN REMAIN UNWORKED WITHOUT COVER MEASURES IS REDUCED TO TWO DAYS, RATHER THAN SEVEN
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(SECTION D.4.2).
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2. STOCKPILES AND STEEP CUT AND FILL SLOPES ARE TO BE PROTECTED IF UNWORKED FOR MORE THAN 12 HOURS (SECTION D.4.2.).
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3, COVER MATERIALS SUFFICIENT TO COVER ALL DISTURBED AREAS SHALL BE STOCKPILED ON SITE (SECTION D.4.2).
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4. ALL AREAS THAT ARE TO BE UNWORKED DURING THE WET SEASON SHALL BE SEEDED WITHIN ONE WEEK OF THE BEGINNING OF THE WET SEASON
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(SECTION 0).
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5. MULCH IS REQUIRED TO PROTECT ALL SEEDED AREAS (SECTION 0).
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6. FIFTY LINEAR FEET OF SILT FENCE (AND THE NECESSARY STAKES) PER ACRE OF DISTURBANCE MUST BE STOCKPILED ON SITE (SECTION D.4.3.1).
7. CONSTRUCTION ROAD AND PARKING LOT STABILIZATION ARE REQUIRED FOR ALL SITES UNLESS THE SITE IS UNDERLAIN BY COARSE -GRAINED SOIL
(SECTION D.4.4,2),
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8. SEDIMENT RETENTION IS REQUIRED UNLESS NO OFFSIDE DISCHARGE IS ANTICIPATED FOR THE SPECIFIED DESIGN FLOW (SECTION D.4.5).
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9. SURFACE WATER CONTROLS ARE REQUIRED UNLESS NO OFFSITE DISCHARGE IS ANTICIPATED FOR THE SPECIFIED DESIGN FLOW (SECTION 0).
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10, PHASING AND MORE CONSERVATIVE BMP'S MUST BE EVALUATED FOR CONSTRUCTION ACTIVITY NEAR SURFACE WATERS (SECTION D5.5.3).
11. ANY RUNOFF GENERATED BY DEWATERING SHALL BE TREATED THROUGH THE CONSTRUCTION OF A SEDIMENT TRAP (SECTION D.4.5.1) WHEN THERE IS
SUFFICIENT SPACE OR BY RELEASING THE WATER TO A WELL -VEGETATED, GENTLY SLOPING AREA. SINCE PUMPS ARE USED FOR DEWATERING, IT MAY BE
POSSIBLE TO PUMP THE SEDIMENT -LADEN WATER WELL AWAY FROM THE SURFACE WATER SO THAT VEGETATION CAN BE MORE EFFECTIVELY UTILIZED FOR
TREATMENT. A STRAW BALE FILTER SHALL BE PLACED AROUND THE DISCHARGE FROM THE DEWATERING PUMP. IF THERE IS NOT SPACE FOR SEDIMENT
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TRAP OR 25 FEET OF SUITABLE VEGETATION, OTHER FILTRATION METHODS SHALL BE REQUIRED CONSISTENCE WITH KCC 9.12.
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12. THE FREQUENCY OF MAINTENANCE REVIEW INCREASES FROM MONTHLY TO WEEKLY (SECTION D.5.4.).
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CONSTRUCTION SEQUENCE
1. CALL FOR PRE -CONSTRUCTION MEETING 48 HOURS PRIOR TO THE START OF SITE WORK,
2. FLAG ALL CLEARING LIMITS AND INSTALL ORANGE SAFETY FENCE ALONG THE PERIMETER OF THE CONSTRUCTION AREA,
3. CLEAR, GRUB AND CONSTRUCT TEMPORARY CONSTRUCTION ENTRANCE, INSTALL SILT FENCING AS SHOWN ON PLANS.
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4. INSTALL A SILT FENCE ALONG THE DOWNSLOPE PERIMETER OF THE AREA THAT IS TO BE DISTURBED. THE SILT FENCE SHALL BE IN PLACE BEFORE
CLEARING AND GRADING IS INITIATED, AND SHALL BE CONSTRUCTED IN CONFORMANCE WITH THE SPECIFICATIONS PRESENTED IN THE 2001 DOE EROSION
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CONTROL MANUAL. THIS WILL BE REQUIRED DURING THE CONSTRUCTION OF BOTH OFF -SITE AND ON -SITE IMPROVEMENTS AS WELL AS BUILDING
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CONSTRUCTION.
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5. INSTALL CATCH BASIN INSERTS.
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6. CLEAR AND INSTALL PERMANENT CATCH BASIN AND PIPE TO MORRIS AVENUE AT S. 37TH STREET.
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7. CLEAR AND GRUB ROADWAY/LOT AREAS AS REQUIRED,
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8. CONSTRUCT EROSION CONTROL MEASURES AS REQUIRED TO MINIMIZE SEDIMENT TRANSPORT AS CONSTRUCTION PROGRESSES.
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9. MAINTAIN EROSION CONTROL MEASURES IN ACCORDANCE WITH CITY OF RENTON AND MANUFACTURER'S RECOMMENDATIONS, THE PROJECT CONTRACTOR
SHALL PERFORM DAILY REVIEW AND MAINTENANCE OF ALL EROSION AND SEDIMENTATIN CONTROL MEASURES AT THE SITE DURING THE CONSTRUCTION OF
BOTH OFF -SITE AND ON -SITE IMPROVEMENTS AS WELL AS BUILDING CONSTRUCTION. WEEKLY REPORTS (WHICH SHALL REFLECT DAILY INSPECTIONS) ON THE
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STATUS AND CONDITION OF THE EROSION CONTROL PLAN WITH ANY RECOMMENDATIONS OF CHANGE OR REVISION TO MAINTENANCE SCHEDULES OR
INSTALLATION SHALL BE SUBMITTED BY THE PROJECT ENGINEER OF RECORD TO THE PUBLIC WORKS INSPECTOR FOR THE PRELIMINARY PLAT CONSTRUCTION.
CERTIFICATION OF THE INSTALLATION, MAINTENANCE AND PROPER REMOVAL OF THE EROSION CONTROL FACILITIES SHALL BE REQUIRED PRIOR TO RECORDING
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OF THE PLAT.
10. RELOCATE SURFACE WATER CONTROLS AND EROSION CONTROL MEASURES, OR INSTALL NEW MEASURES AS SITE CONDITIONS CHANGE SO AS TO MAINTAIN
COMPLIANCE WITH CITY OF RENTON STANDARDS.
11. COVER ALL AREAS THAT WILL BE UNDISTURBED FOR MORE THAN SEVEN DAYS DURING THE DRY SEASON OR TWO DAYS DURING THE WET SEASON WITH
STRAW, WOOD FIBER MULCH, PLASTIC SHEETING OR EQUIVALENT.
12. HYDROSEED AND MULCH ALL REMAINING DISTURBED AREAS.
13. MAINTAIN ALL TEMPORARY EROSION CONTROLS THROUGH THE PROPOSED CONSTRUCTION OF UTILITIES, ROADWAYS, AND OTHER SITE IMPROVEMENTS.
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14. REMOVE ALL REMAINING TEMPORARY EROSION CONTROL ITEMS AFTER ALL DANGER OF EROSION AND SEDIMENTATION PASSES AND UPON APPROVAL BY
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INSPECTOR.
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JOINTS W FILTER FABRIC SHALL BE BE SPLICED AT POSTS
USE STAPLES, WIRE RINGS OR EQUIVALENT TO
ATTACH FABRIC TO POSTS.
2" X 2" 14 GA, WIRE OR EQUIVALENT,
IF STANDARD STRENGTH FABRIC USED
j NOTES:
1. FOR SHEET RUNOFF OR FOLLOWING DISCHARGE FROM A
SEDIMENT TRAP OR POND.
MINIMUM
( (4"x4" TRENCH 2. MAXIMUM SLOPE STEEPNESS PERPENDICULAR TO FENCE
-��---------}� LINE IS 1: 1.
�) I 3. MAXIMUM SHEET OR OVERLAND FLOW PATH LENGTH TO
fir-- 6 MAX 11 THE FENCE OF 100 FT.
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POST SPACING MAY BE INCREASED 4. IF 50% OR LESS OF THE SOIL, BY WEIGHT, 15 FINE PARTICLES
TO 8' IF WIRE BACKING IS USED SMALLER THAN THE U.S. STANDARD SIEVE NO. 200, THE EOS
SHOULD BE EQUAL TO OR SMALLER THAN THE SIEVE SIZE
THAT 85% OF THE SOIL CAN PASS THROUGH.
2" X 2" 14 GA. WIRE OR EQUIVALENT,
IF STANDARD STRENGTH FABRIC USED 5. THE TRENCH SHALL BE BACKALLED WITH 3/4" - 1.5"
WASHED GRAVEL OR NATIVE SOIL.
FILTER FABRIC 5, FILTER FABRIC FENCES SHALL BE REMOVED WHEN THEY HAVE
o SERVED THEIR USEFUL PURPOSE, BUT NOT BEFORE THE
UPSLOPE AREA HAS BEEN PERMANENTLY STABILIZED.
MINIMUM 47x4" TRENCH N 6, FILTER FABRIC FENCES SHALL BE INSPECTED IMMEDIATELY
BACKFILL TRENCH WITH NATIVE SOIL AFTER EACH RAINFALL AND AT LEAST DAILY DURING
OR 3/4"-1.5" WASHED GRAVEL 18 * MIN' PROLONGED RAINFALL. ANY REPAIRS SHALL BE MADE
• IF ABOVE SLOPES ARE IMMEDIATELY.
STEEPER THAN 3:1 THAN 7 MINIMUM HEIGHT OF THE TOP OF SILT FENCE SHALL BE 2 FT.
MINIMUM DEPTH OF 24' AND THE MAXIMUM SHALL BE 2.5 FT, ABOVE ORIGINAL GROUND
2'x2" WOOD POSTS, STEEL FENCE-- SURFACE,
POSTS, OR EQUIVALENT
FILTER FABRIC FENCE
NOT TO SCALE
GRATE
CATCH BASIN
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SOLID WALLS
FILTER POROUS BOTTOM
MEDIA
CATCH BASIN INSERT_
NOT TO :tE
EXISTING
GROUND
CULVERT AS REQUIRED
DRIVEWAY RAMP ORS
PAVED SURFACE
FT. MINIMUM OR TO CARALF -
WHICHEVER IS SHORTER
24 FT. MINIMUM
GEOTEXTILE BENEATH
QUARRY SPALLS
4" TO 6" QUARRY SPALLS
PAVED
DRIVING
SURFACE
25 FT. RADIUS '
NOTES: PLAN
1. PAD SHALL BE REMOVED AND REPLACED WHEN SOIL IS EVIDENT ON THE SURFACE OF THE
PAD OR AS DIRECTED BY THE CITY CLEARING AND GRADING INSPECTOR.
2, PAD SHALL BE INSTALLED IN PLANTING STRIP AS APPROPRIATE.
3. PAD THICKNESS SHALL BE INCREASED IF SOIL CONDITIONS DICTATE OR PER THE
DIRECTION OF THE CITY CLEARING AND GRADING INSPECTOR.
4. MINIMUM DIMENSIONS MAY BE MODIFIED AS REQUIRED BY SITE CONDITIONS UPON APPROVAL
OF THE CITY CLEARING AND GRADING INSPECTOR,
5. DUE TO SITE CONSTRAINTS AND ALL INFRASTRUCTURE BEING PREVIOUSLY
CONSTRUCTED IN AUGUST OF 2003, THE CONSTRUCTION ENTRANCE HAS BEEN MODIFIED.
TEMPORARY
R CONSTRUCTION
SINGLE FAMILY
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R-3 ?03
RECOMMENDED
FOR APPROVAL
BY: DATE:
BY: DATE:
BY: DATE:
7� - - s" I I-
CaN 2 Working Days Before You Dig
1-800-424-5555
Utilities Underground Location Center
(ID,MT,ND,OR,WA)
REVISIONS
NO.
DESCRIPTION/DATE
BY
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EXPIRES 10/19/05
JOB NO.: 994-005-004
DWG. NAME: ER-02
DESIGNED BY: RCL
DRAWN BY: CJR
CHECKED BY: REM
DATE: 11-01-04
DATE OF
PRINT:
N
ER-02
4 - - 6 SHEETS