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CITY OF RENTON
JEMPORARY EROSION [SEDIMENTATION CONTROL NOTES:
1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRECONSTRUCTION
MEETING MUST BE HELD WITH THE CITY OF RENTON DEPARTMENT OF PUBLIC WORKS,
DESIGN REVIEW ENGINEER AND THE OWNERS REPRESENTATIVE. .
2. ALL LIMITS OF CLEARING (PROJECT LIMITS) AND AREAS OF VEGETATION PRESERVATION
AS PRESCRIBED ON THE PLAN SHALL BE CLEARLY FLAGGED IN THE FIELD AND OBSERVED
DURING CONSTRUCTION. THE FLAGGING SHALL BE MAINTAINED BY THE CONTRACTOR FOR
THE DURATION OF THE PROJECT.
3. THE TESC FACILITIES SHALL BE INSPECTED DAILY BY THE CONTRACTOR AND MAINTAINED
AS NECESSARY TO INSURE THEIR CONTINUED FUNCTIONING.
4. THE TESC FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A
MINIMUM OF ONCE A MONTH OR WITHIN 48 HOURS FOLLOWING A STORM EVENT
(EXCEEDING 1' IN 24 HOURS).
5. ALL REQUIRED TESC FACILITIES MUST BE CONSTRUCTED AND IN OPERATION PRIOR TO
LAND CLEARING AND /OR OTHER CONSTRUCTION TO INSURE THAT SEDIMENT LADEN
WATER DOES NOT ENTER THE NATURAL DRAINAGE SYSTEM. ALL FACILITIES SHALL BE
MAINTAINED IN A SATISFACTORY CONDITION UNTIL SUCH TIME THAT CLEARING
AND /OR. CONSTRUCTION IS COMPLETED AND POTENTIAL FOR ON —SITE EROSION HAS
PASSED. THE IMPLEMENTATION, MAINTENANCE, REPLACEMENT AND ADDITIONS TO
TESC SYSTEMS SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR.
6. DURING THE TIME PERIOD OF NOVEMBER 1 THROUGH MARCH 31, ALL PROJECT DISTURBED
SOIL AREAS GREATER THAN 5,000 SQUARE FEET THAT ARE TO BE LEFT UNWORKED FOR
MORE THAN TWELVE (12) HOURS SHALL BE TEMPORARILY COVERED WITH 6 MIL POLYVINYL
SHEETING, MULCH, OR SODDING. SHEETING SHALL BE "TOED —IN' AT THE TOP OF SLOPES
2 FEET IN ORDER TO PREVENT SURFACE WATER FLOW BENEATH THE SHEETS.
7. IN ANY AREA WHICH HAS BEEN STRIPPED OF VEGETATION AND WHERE NO FURTHER WORK
IS ANTICIPATED FOR A PERIOD OF 30 DAYS OR MORE, ALL DISTURBED AREAS MUST BE
IMMEDIATELY STABILIZED WITH MULCHING, GRASS PLANTING OR OTHER APPROVED EROSION
CONTROL TREATMENT APPLICABLE TO THE 11ME OF YEAR IN QUESTION. GRASS SEEDING
ALONE WILL BE ACCEPTABLE ONLY DURING THE MONTHS OF APRIL THROUGH SEPTEMBER
INCLUSIVE. SEEDING MAY PROCEED, BUT MUST BE AUGMENTED WITH MULCHING, NETTING,
OR OTHER TREATMENT APPROVED BY THE CITY OF RENTON, OUTSIDE THE SPECIFIED
TIME PERIOD.
8. A TEMPORARY GRAVEL CONSTRUCTION ENTRANCE, 24' X 100' X 12° OF 4 TO 8 INCH
QUARRY SPALLS SHALL BE LOCATED AT ALL POINTS OF VEHICULAR INGRESS AND
EGRESS TO THE CONSTRUCTION SIZE
9. THE IMPLEMENTATION OF THESE TESC PLANS AND THE CONSTRUCTION, MAINTENANCE,
REPLACEMENT AND UPGRADING OF THESE TESC FACILITIES IS THE RESPONSIBILITY
OF THE CONTRACTOR UNTIL ALL CONSTRUCTION IS COMPLETED AND FINAL APPROVALS
ARE OBTAINED.
10. AT NO TIME SHALL MORE THAN ONE F0OT OF SEDIMENT BE ALLOWED TO
ACCUMULATE WITHIN AN EXISTING CATCH BASIN. ALL EXISTING CATCH BASINS
AND CONVEYANCE LINES SHALL BE CLEANED PRIOR TO PAVING. THE CLEANING
OPERATION SHALL NOT FLUSH SEDIMENT LADEN WATER INTO THE DOWNSTREAM
SYSTEM OR SPRINGBROOK CREEK.
11. TESC FACIUTES SHOWN ON THE PLANS ARE MINIMUM FACILITIES. THE CONTRACTORS
METHOD OF OPERATION MAY REQUIRE ADDITIONAL FACILITIES. THE CONTRACTOR
WALL PROVIDE ADDITIONAL FACILITIES, IF NEEDED, IN ACCORDANCE NTH CHAPTER 5
OF THE KING COUNTY SURFACE WATER DESIGN MANUAL.
12. THE CONTRACTOR SHALL UTILIZE EXISTING ROADS FOR CONSTRUCTION TRAFFIC WHEREVER
POSSIBLE. ANY POTHOLES OR MUDHOLES SHALL BE FILLED WITH COARSE ROCK TO
PREVENT EROSION /SEDIMENTATION. THE CONTRACTOR SHALL BE REQUIRED TO PROVIDE
A COARSE ROCK OVERLAY FOR ANY ROADING REQUIRED OFF OF EXISTING ESTABLISHED
TRAFFIC AREAS.
13. THE IMPLEMENTATION OF THESE TESC PLANS AND THE CONSTRUCTION, MAINTENANCE,
REPLACEMENT AND UPGRADING OF THESE TESC FACILITIES IS THE RESPOSIBILITY
OF THE CONTRACTOR UNTIL ALL CONSTRUCTION IS COMPLETED AND FINAL APPROVALS
ARE OBTAINED.
THIS BAR IS 1 ° ACTUAL SIZE.
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1/412 1'
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DESIGNED:
R.B.
v ® FETRO Municipality of Metropolitan Seattle
Ir
DAT�
NOVEMBER 1992
AWN'
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SOUTH INTERCEPTOR — PARALLEL
FILE No-
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PHASE 1
NOTES
ANf No
C102
W/M 4492
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REVISION
BY
DATE
EXPIRES: 06/14,93
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