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EROSION / SEDIMENTATION CONTROL NOTES
1. THESE NOTES SHALL APPEAR FOR ALL PROJECTS - SITE IMPROVEMENTS, SURFACE WATER UTILITY,
WASTEWATER UTILITY, WATER UTILITY, AND TRANSPORTATION PLANS.
2. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE -CONSTRUCTION MEETING
MUST BE HELD WITH THE CITY OF RENTON, PUBLIC WORKS DESIGN ENGINEER.
3. THE BOUNDARIES OF THE CLEARING LIMITS AND AREAS OF VEGETATION PRESERVATION AS
PRESCRIBED ON THE PLAN(S) SHALL BE CLEARLY FLAGGED BY SURVEY TAPE OR FENCING IN THE
FIELD PRIOR TO CONSTRUCTION IN ACCORDANCE WITH APPENDIX D OF THE SURFACE WATER
DESIGN MANUAL AND OBSERVED DURING CONSTRUCTION. DURING THE CONSTRUCTION PERIOD, NO
DISTURBANCE BEYOND THE CLEARING LIMITS SHALL BE PERMITTED. THE CLEARING LIMITS SHALL BE
MAINTAINED BY THE APPLICANT/TESC SUPERVISOR FOR THE DURATION OF CONSTRUCTION.
4. STABILIZED CONSTRUCTION ENTRANCES SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION
AND MAINTAINED FOR THE DURATION OF THE PROJECT. ADDITIONAL MEASURES, SUCH AS
CONSTRUCTED WHEEL WASH SYSTEMS OR WASH PADS, MAY BE REQUIRED TO ENSURE THAT ALL
PAVED AREAS ARE KEPT CLEAN AND TRACK OUT TO ROAD RIGHT OF WAY DOES NOT OCCUR FOR
THE DURATION OF THE PROJECT.
5. ALL REQUIRED SEDIMENTATION/EROSION CONTROL FACILITIES MUST BE CONSTRUCTED AND IN
OPERATION PRIOR TO LAND CLEARING AND/OR CONSTRUCTION TO PREVENT TRANSPORTATION OF
SEDIMENT TO SURFACE WATER, DRAINAGE SYSTEMS AND ADJACENT PROPERTIES. 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.
6. 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.
7. 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.
8. ANY AREAS OF EXPOSED SOILS, INCLUDING ROADWAY EMBANKMENTS, THAT WILL NOT BE
DISTURBED FOR TWO DAYS DURING THE WET SEASON (OCTOBER 1ST TROUGH MARCH 30TH) OR
SEVEN DAYS DURING THE DRY SEASON (APRIL 1ST TOUGH SEPTEMBER 30) SHALL BE IMMEDIATELY
STABILIZED WITH THE APPROVED ESC COVER METHODS (E.G., SEEDING, MULCHING, PLASTIC
COVERING, ETC.).
9. WET SEASON SEASONAL EROSION AND SEDIMENT CONTROL REQUIREMENTS APPLY TO ALL
CONSTRUCTION SITES CLEARING BETWEEN OCTOBER 1 AND MARCH 30 INCLUSIVE, UNLESS
OTHERWISE APPROVED BY THE CITY THROUGH AN ADJUSTMENT PROCESS.
10. COVER MEASURES WILL BE APPLIED IN CONFORMANCE WITH APPENDIX D OF THE SURFACE
WATER DESIGN MANUAL.
11. ANY AREA NEEDING ESC MEASURES, NOT REQUIRING IMMEDIATE ATTENTION, SHALL BE ADDRESSED
WITHIN SEVEN (7) DAYS.
12. THE ESC FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A MINIMUM OF
ONCE A MONTH OR WITHIN 24 HOURS FOLLOWING A STORM EVENT.
13, AT NO TIME SHALL MORE THAN ONE (1) FOOT OF SEDIMENT BE ALLOWED TO ACCUMULATE
WITHIN A CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED PRIOR
TO PAVING. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT -LADEN WATER INTO THE
DOWNSTREAM SYSTEM.
14. DURING THE TIME PERIOD OF OCTOBER 1ST THROUGH MARCH 30TH, ALL PROJECT DISTRIBUTED
SOIL AREAS GREATER, THAT ARE TO BE LEFT UN -WORKED FOR MORE THAN 12 HOURS, SHALL
BE COVERED BY MULCH, SODDING OR PLASTIC COVERING.
15. ANY PERMANENT RETENTION/DETENTION FACILITY USED AS A TEMPORARY SETTLING BASIN SHALL
BE MODIFIED WITH THE NECESSARY EROSION CONTROL MEASURES AND SHALL PROVIDE ADEQUATE
STORAGE CAPACITY. IF THE PERMANENT FACILITY IS TO FUNCTION ULTIMATELY AS AN INFILTRATION
SYSTEM, THE TEMPORARY FACILITY MUST BE ROUGH GRADED SO THAT THE BOTTOM AND SIDES
ARE AT LEAST THREE FEET ABOVE THE FINAL GRADE OF THE PERMANENT FACILITY.
16. PRIOR TO THE BEGINNING OF THE WET SEASON (OCT. 1), ALL DISTURBED AREAS SHALL BE
REVIEWED TO IDENTIFY WHICH ONES CAN BE SEEDED IN PREPARATION FOR THE WINTER RAINS.
DISTURBED AREAS SHALL BE SEEDED WITHIN ONE WEEK OF THE BEGINNING OF THE WET
SEASON. A SKETCH MAP OF THOSE AREAS TO BE SEEDED AND THOSE AREAS TO REMAIN
UNCOVERED SHALL BE SUBMITTED TO THE CITY OF RENTON FOR REVIEW.
STRUCTURAL NOTES
1. THESE PLANS ARE APPROVED FOR STANDARD ROAD AND DRAINAGE IMPROVEMENTS ONLY.
PLANS FOR STRUCTURES SUCH AS BRIDGES, VAULTS, AND RETAINING WALLS REQUIRE A SEPARATE
REVIEW AND APPROVAL BY THE CITY PRIOR TO CONSTRUCTION.
2. ROCKERIES ARE CONSIDERED TO BE A METHOD OF BANK STABILIZATION AND EROSION
CONTROL. ROCKERIES SHALL NOT BE CONSTRUCTED TO SERVE AS RETAINING WALLS. ALL ROCKERIES
IN CITY ROAD RIGHT-OF-WAY SHALL BE CONSTRUCTED IN ACCORDANCE WITH CITY STANDARDS.
ROCKERIES OUTSIDE OF ROAD RIGHT-OF-WAY SHALL BE CONSTRUCTED IN ACCORDANCE WITH THE
INTERNATIONAL BUILDING CODE.
Call 2 Working Days Before You Dig
811
Utilities Underground Location Center
(ID,MT,ND,OR,WA)
WET SEASON PROVISIONS
NOTE: THE PROJECT EARTHWORK IS LIMITED TO SEASONALLY DRIER PERIODS (TYPICALLY APRIL 1 TO
OCTOBER 31) IN ACCORDANCE WITH THE GEOTECHNICAL RECOMMENDATION MADE BY ASSOCIATED
EARTH SCIENCES, INC, (DATED JANUARY 18, 2017).
NOTE: THE FOLLOWING MEASURES ARE REQUIRED FOR CONSTRUCTION DURING THE WET SEASON
(OCTOBER 1 - APRIL 30) IN ADDITION TO THE STANDARD TESC MEASURES.
1. THE ALLOWED TIME THAT A DISTURBED AREA MAY REMAIN UNWORKED WITHOUT COVER MEASURES
IS REDUCED TO TWO CONSECUTIVE WORKING DAYS, RATHER THAN SEVEN (SECTION D.3.2).
2. STOCKPILES AND STEEP CUT AND FILL SLOPES ARE TO BE PROTECTED IF UNWORKED FOR MORE
THAN 12 HOURS (SECTION D.3.2).
3. COVER MATERIALS SUFFICIENT TO COVER ALL DISTURBED AREAS SHALL BE STOCKPILED ON SITE
(SECTION D.3.2).
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 (SECTION D.3.2.5).
5. MULCH IS REQUIRED TO PROTECT ALL SEEDED AREAS (SECTION D.3.2.1).
6. FIFTY LINEAR FEET OF SILT FENCE (AND THE NECESSARY STAKES) PER ACRE OF DISTURBANCE
MUST BE STOCKPILED ON SITE (SECTION D.3.3.1).
7. CONSTRUCTION ROAD AND PARKING LOT STABILIZATION ARE REQUIRED FOR ALL SITES UNLESS
THE SITE IS UNDERLAIN BY COARSE -GRAINED SOIL (SECTION D.3.4.2).
8. SEDIMENT RETENTION IS REQUIRED UNLESS NO OFFSITE DISCHARGE IS ANTICIPATED FOR THE
SPECIFIED DESIGN FLOW (SECTION D.3.5).
9. SURFACE WATER CONTROLS ARE REQUIRED UNLESS NO OFFSITE DISCHARGE IS ANTICIPATED FOR
THE SPECIFIED DESIGN FLOW (SECTION D.3.6).
10. PHASING AND MORE CONSERVATIVE BMPS MUST BE EVALUATED FOR CONSTRUCTION ACTIVITY
NEAR THE SURFACE WATERS (SECTION D.5.3).
11. ANY RUNOFF GENERATED BY DEWATERING MAY BE REQUIRED TO DISCHARGE TO THE SANITARY
SEWER (WITH APPROPRIATE DISCHARGE AUTHORIZATION), PORTABLE SAND FILTER SYSTEMS, OR
HOLDING TANKS.
12. THE FREQUENCY OF MAINTENANCE REVIEW INCREASES FROM MONTHLY TO WEEKLY (SECTION
D.5.4).
CONDITIONS FOR WET SEASON CONSTRUCTION
1. ANY CONSTRUCTION THAT WILL RESULT IN DISTURBED AREAS ON OR WITHIN A CRITICAL AREA OR
ASSOCIATED BUFFER, SHALL BE SUBJECT TO THE "CRITICAL AREA RESTRICTIONS" CONTAINED IN
THE ESC STANDARDS. THESE PROVISIONS INCLUDE PHASING THE PROJECT WHENEVER POSSIBLE
SO THAT CONSTRUCTION IN THESE AREAS IS LIMITED TO THE DRY SEASON.
2. DURING
CONSTRUCTION, ESC PLANS SHALL BE REVISED AS
NECESSARY BY THE ESC SUPERVISOR
OR
AS
DIRECTED BY THE CITY TO ADDRESS CHANGING SITE CONDITIONS, UNEXPECTED STORM
EVENTS,
OR NON-COMPLIANCE WITH THE ESC PERFORMANCE CRITERIA IN SECTION D.4.1 (P.
D-69).
IF NON-COMPLIANCE WITH THE ESC PERFORMANCE
CRITERIA OCCURS, THE PLAN MUST
BE
UPDATED
WITHIN 48 HOURS (FAILURE TO DO SO COULD
RESULT IN A "STOP WORK" ORDER
AS
DETERMINED BY THE CITY INSPECTOR) OF INSPECTIONS
OR INVESTIGATIONS. IMPLEMENTATION
OF
THE
ONSITE CHANGES MUST OCCUR WITHIN 5 DAYS.
3. ALL ESC MEASURES SHALL BE MAINTAINED AND REVIEWED ON A REGULAR BASIS AS PRESCRIBED
IN THE MAINTENANCE REQUIREMENTS FOR EACH BMP AND IN THIS SECTION. THE ESC
SUPERVISOR SHALL REVIEW THE SITE AT LEAST WEEKLY DURING THE WET SEASON, AND WITHIN
24 HOURS OF SIGNIFICANT STORMS. IN GENERAL, A SIGNIFICANT STORM IS ONE WITH MORE
THAN 0.5 INCHES OF RAIN IN 24 HOURS OR LESS. THE CITY MAY REQUIRE THAT A WRITTEN
RECORD OF THESE REVIEWS BE KEPT ON SITE WITH COPIES SUBMITTED TO THE CITY WITHIN 48
HOURS.
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EXISTING GROUND i
OVERFLOW i
ELEV.=239.00 TOP ELEV.=
240.00
BOTTOM ELEV.=235.50
TEMPORARY SEDIMENT TRAP #1
SECTION A -A
SCALE: 1"=20' HORIZ.
1 "= 5' VERT.
0 FIRST SUBMITTAL
1 SECOND SUBMITTAL
DOES N O T N C E U D E 2 THIRD SUBMITTAL
ASBU ET NEORMAT ON
NO. I REVISION
250
245
240
235
250
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MULCH STANDARDS AND GUIDELINES
MULCH
QUALITY
APPLICATION
MATERIAL
STANDARDS
RATES
REMARKS
STRAW
AIR-DRIED; FREE FROM
2"-3" THICK; 2-3
COST-EFFECTIVE PROTECTION WHEN APPLIED
UNDESIRABLE SEED
BALES PER 1000 SF OR
WITH ADEQUATE THICKNESS. HAND -APPLICATION
AND COARSE MATERIAL
2-3 TONS PER ACRE
GENERALLY REQUIRES GREATER THICKNESS THAN
BLOWN STRAW. STRAW SHOULD BE CRIMPED TO
AVOID WIND BLOW. THE THICKNESS OF STRAW
MAY BE REDUCED BY HALF WHEN USED IN
CONJUNCTION WITH SEEDING.
WOOD FIBER
NO GROWTH INHIBITING
APPROX. 25-30 LBS
SHALL BE APPLIED WITH HYDROMULCHER. SHALL
CELLULOSE
FACTORS
PER 1000 SF OR
NOT BE USED WITHOUT SEED AND TACKIFIER
1000-1500 LBS PER
UNLESS THE APPLICATION RATE IS AT LEAST
ACRE
DOUBLED. SOME WOOD FIBER WITH VERY LONG
FIBERS CAN BE EFFECTIVE AT LOWER
APPLICATION RATES AND WITHOUT SEED OR
TACKIFIER.
COMPOST
NO VISIBLE WATER OR
2" THICK MIN.;
MORE EFFECTIVE CONTROL CAN BE OBTAINED BY
DUST DURING
APPROX. 100 TONS
INCREASING THICKNESS TO 3". EXCELLENT
HANDLING. MUST BE
PER ACRE (APPROX.
MULCH FOR PROTECTING FINAL GRADES UNTIL
PURCHASED FROM
800 LBS PER YARD)
LANDSCAPING BECAUSE IT CAN BE DIRECTLY
SUPPLIER WITH SOLID
SEEDED OR TILLED INTO SOIL AS AN
WASTE HANDLING
AMENDMENT. SOURCES FOR COMPOST ARE
PERMIT.
AVAILABLE FROM THE KING COUNTY COMMISSION
FOR MARKETING RECYCLABLE MATERIALS AT
(206) 296-4439.
CHIPPED SITE
AVERAGE SIZE SHALL
2" MINIMUM
THIS IS A COST-EFFECTIVE WAY TO DISPOSE OF
VEGETATION
BE SEVERAL INCHES.
THICKNESS
DEBRIS FROM CLEARING AND GRUBBING, AND IT
ELIMINATES THE PROBLEMS ASSOCIATED WITH
BURNING. GENERALLY, IT SHOULD NOT BE USED
ON SLOPES ABOVE APPROX. 10% BECAUSE OF
ITS TENDENCY TO BE TRANSPORTED BY RUNOFF.
IT IS NOT RECOMMENDED WITHIN 200 FEET OF
SURFACE WATERS. IF SEEDING IS EXPECTED
SHORTLY AFTER MULCH, THE DECOMPOSITION OF
THE CHIPPED VEGETATION MAY TIE UP NUTRIENTS
IMPORTANT TO GRASS ESTABLISHMENT.
EXISTING GROUND
i
i
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/ TOP ELEV.-
OVERFLOW 240.00
ELEV.=239.00
1 BOTTOM ELEV.=235.50
TEMPORARY SEDIMENT TRAP #2
SECTION B-B
ESM 08/30/17 SURVEYED:
ESM 11/15/17 DESIGNED:
ESM 01/03/18 PDG
DRAWN:
DCL
CHECKED:
BY I DATE I APPR I APPROVED
SCALE:
SCALE: 1"=20' HORIZ.
1"=5' VERT.
VERTICAL: NAVD 1988
NM HORIZONTAL: NAD 1983/1991
ONE INCH DATU M
AT FULL SCALE
IF NOT ONE INCH
SCALE ACCORDINGLY
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Aamb6C TY OF
Ap
RENTON
Planning/Building/Public Works Dept.
IN COMPLIANCE WITH CITY OF RENTON STANDARDS
EARLINGTON TOWNHOMES
GRADING & T.E.S.C. DETAILS & NOTES
UTILITY PERMIT #
01/03/18
FIELDBOOK:
PAGE:
DRAWING NO:
GR-04
SHEET: 11 OF:
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R-397111