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Sanitary Sewer Notes and Specifications
THESE NOTES SHALL APPEAR ON PROJECTS FOR THE WASTEWATER UTILITY.
1. All work and work material shall be in conformance with the standards and specifications
of the City of Renton Planning/Building/Public Works Department and the latest edition
of the WSDOT/APWA Standards and Specifications, as approved and modified by the
City of Renton in the Renton Standard Plans & Specifications. A set of approved plans
shall be kept on site at all times during construction.
2. The hours of work in the street right of way shall be per City specifications on weekdays
unless otherwise approved in writing by the Planning/Building/Public Works Department.
An approved traffic control plan must be obtained prior to beginning any work within
public right of way.
3. All locations of existing utilities shown are approximate and it shall be the contractor's
responsibility to verify the true and correct location so as to avoid damage or
disturbance.
4. A pre -construction conference and a 24 hour notice shall be required prior to starting
new construction. It shall be the contractor's responsibility to secure all necessary
permits prior to starting construction. (Inspection will be accomplished by a
representative of the City of Renton.) It shall be the contractor's responsibility to notify
the Public Works inspector 24 hours in advance of backfilling all construction.
5. Contractor is solely responsible for the means, methods and sequences of construction
and for the safety of workers and others on the construction site.
6. It shall be the responsibility of the contractor to obtain street use and any other related
permits prior to any construction.
7. Plans approved by the City of Renton, Public Works Department shall take precedence
over all other plans.
8. A copy of these approved plans must be on the job site whenever construction is in
progress.
9. The contractor shall provide the City of Renton with an as -built drawing of the sanitary
sewer system, which has been stamped and signed by a licensed professional engineer
or licensed professional surveyor.
10. Backfill shall be placed equally on both sides of the pipe in layers with a loose average
depth of 6 inches, maximum depth of 8 inches, thoroughly tamping each layer to 95
percent of maximum density. These compacted layers must extend for one pipe
diameter on each side of the pipe or to the side of the trench. Materials to complete the
fill over pipe shall be the same as described.
11. Open cut road crossings for utility trenches on existing traveled roadway shall be
backfilled with crushed rock and mechanically compacted unless otherwise approved by
12. Datum for Vertical Control shall be North American Vertical Datum 1988 Meters, and for
Horizontal Control shall be North American Datum 1983/1991 Meters unless otherwise
approved by the City of Renton Public Works Department. Reference benchmark and
elevations are noted on the plans.
13. All disturbed areas shall be seeded and mulched or otherwise stabilized to the
satisfaction of the Department for the prevention of on-site erosion after the completion
of construction.
14. All pipe and appurtenances shall be laid on a properly prepared foundation in
accordance with the standards and specifications of the City of Renton
Planning/Building/Public Works Department and the latest edition of the WSDOT/APWA
Standards and Specifications, as approved and modified by the City of Renton in the
Renton Standard Plans & Specifications. This shall include necessary leveling of the
trench bottom or the top of the foundation material, as well as placement and
compaction of required bedding material, to uniform grade so that the entire length of
the pipe will be supported on a uniformly dense, unyielding base. Pipe bedding shall be
pea gravel 6 inches above and below the pipe.
15. Sanitary sewer pipe shall be polyvinyl chloride (PVC) rubber gasketed ASTM D 3034,
SDR 35, or ductile iron class 50, unless otherwise approved by the Wastewater Utility.
16. In unimproved areas, manhole to extend minimum 6 inches and maximum 12 inches
above finished grade or must have minimum 2' diameter concrete ring poured at grade.
In paved area, cover must slope in all directions to match paving.
BACKFILL TO MATCH
EXISTING GRADE
EXISTING GRADE -\
VERTICAL SIDES OF TRENCH TO MINIMIZE
EXCAVATION. ADEQUATLY BRACE TO MEET ALL
SAFETY CODES AND REGULATIONS.
IMPORTED COMPACTED
BACKFILL LAID IN 8" LOOSE
LIFTS (95% MAX. DENSITY)
ORANGE GEOTEXTILE ON SIDES
AND BOTTOM. 2" MIN. LAP 0
JOINTS.
bw 1T 1- COMPACTED PIPE BEDDING IN
4" LAYE RS
ft (95% MAX DENSITY)
r. I
PIPE (W/POLYWRAP),III il 1111111111111111 QD N07e.
1'-0" 1 EXCAVATED SOIL TO BE STOCKPILED AND
MAX MAX TESTED FOR CONTAMINATION PER
ism as Ln _04 SPECIFICATIONS.
PIPE BEDDING AND BACKFILL SECTION
NOT TO SCALE
CONSTRUCTION NOTES
Erosion Control Notes
THESE NOTES SHALL APPEAR FOR ALL PROJECTS - SITE IMPROVEMENTS, SURFACE WATER
UTILITY, WASTEWATER UTILITY, WATER UTILITY, AND TRANSPORTATION PLANS:
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 operatior
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 tc
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 ar
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.
WATER PLAN GENERAL NOTES Standard Plan No. 300
1. ALL WORK AND MATERIALS SHALL BE IN ACCORDANCE WITH THE LATEST EDITION OF THE CITY OF RENTON PUBLIC WORKS
STANDARD SPECIFICATIONS AND SPECIAL PROVISIONS AND WSDOT / APWA STANDARD SPECIFICATIONS, LATEST EDITION AS
AMENDED BY THE CITY OF RENTON. A SET OF CITY APPROVED PLANS SHALL BE KEPT AT THE JOB SITE WHENEVER CONSTRUCTION
IS IN PROGRESS. A PRE -CONSTRUCTION CONFERENCE SHALL BE HELD PRIOR TO THE START OF CONSTRUCTION. THE CONTRACTOR
AND OR DEVELOPER SHALL BE RESPONSIBLE FOR SECURING ALL NECESSARY PERMITS PRIOR TO CONSTRUCTION.
2. ALL EXISTING UTILITIES SHALL REMAIN IN SERVICE DURING CONSTRUCTION UNLESS OTHERWISE NOTED. THE CONTRACTOR SHALL
CALL 1-800-424-5555 TO VERIFY UTILITY LOCATIONS BEFORE BEGINNING EXCAVATION.
3. ALL MATERIALS USED FOR THE CONSTRUCTION OF WATER SYSTEM IMPROVEMENTS SHALL BE NEW AND UNDAMAGED, AND
"CATALOG CUTS" FOR ALL MATERIALS SHALL BE APPROVED IN WRITING BY THE CITY OF RENTON PRIOR TO BRINGING ANY
MATERIALS ON-SITE.
4. ALL WATER MAIN PIPE MATERIALS SHALL BE CEMENT LINED DUCTILE IRON PIPE, THICKNESS CLASS 52 PER AWWA C 151 AND C
104. PIPE JOINTS SHALL BE PUSH -ON OR MECHANICAL JOINT. CAST IRON OR DUCTILE IRON PIPE FITTINGS SHALL BE CLASS 250 AS
PER ANSI/AWWA C110/A21.10-82. ALL DUCTILE IRON PIPE AND FITTINGS SHALL BE WRAPPED WITH 8 -MIL BLACK, TUBE -TYPE,
POLYETHYLENE PLASTIC PER AWWA C105 STANDARDS.
5. MINIMUM COVER FROM TOP OF WATER MAINS TO FINISHED GRADE SHALL BE 36 INCHES FOR PIPE DIAMETER OF 10 -INCH OR LESS
AND 48 INCHES FOR PIPE DIAMETER OF 12 -INCH AND LARGER. MAXIMUM COVER FOR ALL WATER MAINS SHALL BE 60 INCHES.
ANY DEVIATIONS MUST BE APPROVED BY THE CITY OF RENTON PRIOR TO CONSTRUCTION. WHERE UTILITY CONFLICTS OCCUR,
THE PROFILE OF THE WATER MAIN SHALL BE ADJUSTED AS NECESSARY TO CLEAR CONFLICTS AND TO PROVIDE MINIMUM COVER.
PIPE DEFLECTION SHALL NOT EXCEED ONE-HALF OF PIPE MANUFACTURER'S SPECIFICATION FOR SIZE OF PIPE USED. ALL TRENCH
BACKFILL SHALL BE COMPACTED TO 95 PERCENT MAXIMUM DRY DENSITY AS DETERMINED BY THE MODIFIED PROCTOR TEST
METHOD (MDD) IN ROADWAYS, ROADWAY SHOULDERS, ROADWAY PRISM AND DRIVEWAYS, AND 85 PERCENT MDD IN UNPAVED
AREAS. ALL PIPE ZONE COMPACTION SHALL BE 95 MDD.
6. CONCRETE BLOCKING FOR WATER MAINS SHALL BE DESIGNED, INSTALLED AND POURED IN PLACE IN ACCORDANCE WITH CITY OF
RENTON STANDARD DETAILS AND SPECIFICATIONS AND SHALL BE INSTALLED AT ALL VERTICAL AND HORIZONTAL BENDS, FITTINGS
AND BASE OF HYDRANTS. MEGA -LUGS (OR SIMILAR PRODUCT) MAYBE REQUIRED ON ALL MECHANICAL JOINTS IN ADDITION TO
CONCRETE BLOCKING.
7. ALL NEW WATER MAIN PIPES AND FITTINGS SHALL HAVE A FOAM PIPE PIG RUN THROUGH THEM PRIOR TO BEING FLUSHED,
DISINFECTED, AND TESTED. CLEANING, PRESSURE AND PURITY TESTING SHALL BE DONE IN THE PRESENCE OF AND UNDER THE
SUPERVISION OF A CITY OF RENTON UTILITY INSPECTOR. THE CONTRACTOR SHALL SUPPLY, INSTALL AND REMOVE PLUGS,
CORPORATION STOPS, BLOW -OFF ASSEMBLIES, AND THRUST RESTRAINT / BLOCKING FOR TESTING AND PURITY ACCEPTANCE. NO
CONNECTION SHALL BE MADE BETWEEN THE NEW MAIN OR BETWEEN THE NEW WET -TAP VALVE TO AN EXISTING MAIN UNTIL
THE NEW PIPING HAS BEEN FOAM -PIGGED, DISINFECTED, FLUSHED, AND PASSED BOTH PRESSURE AND PURITY TESTING.
8. NEW WATER MAINS INCLUDING SERVICE LATERALS SHALL BE TESTED AT A STATIC PRESSURE OF 150 PSI ABOVE WORKING
PRESSURE WITH A MINIMUM OF 225 PSI TEST PRESSURE FOR 120 MINUTES WITH A MAXIMUM OF 5 PSI PRESSURE DROP DURING
THE ENTIRE TEST PERIOD. UPON SATISFACTORY COMPLETION OF THE PRESSURE TEST, THE LINE SHALL BE DISINFECTED, FLUSHED,
AND THEN WATER SAMPLES SHALL BE TAKEN FOR PURITY TESTING BY THE PUBLIC WORKS INSPECTOR.
9. THE CONTRACTOR SHALL NOTIFY THE CITY OF RENTON WATER UTILITY AND MAINTENANCE DEPARTMENTS AT LEAST 10 WORKING
DAYS PRIOR TO MAKING CONNECTIONS TO THE EXISTING WATER SYSTEM. THE CONTRACTOR SHALL EXPOSE THE EXISTING WATER
MAIN AND FITTINGS AT THE CONNECTION POINT BEFORE ORDERING THE NECESSARY ADAPTORS AND FITTINGS REQUIRED FOR
THE FINAL CONNECTION. THE CONTRACTOR SHALL EXCAVATE, REMOVE ALL SURFACE MATERIALS, AND PROVIDE SHORING AND
ALL MATERIALS REQUIRED FOR THE CITY OF RENTON TO PERFORM THE CONNECTION TO THE EXISTING WATER SYSTEM. THE
CONTRACTOR SHALL PROVIDE AND INSTALL BACKFILL, CONCRETE BLOCKING, AND COMPLETE SURFACE RESTORATION.
+ + PUBLIC WORKS
DEPARTMENT
WATER F4.AN GENEIRAL NOTES
1.1 V 11 a; J F1 Z M 12 wl#T#Vl J
MARCH 2010
Surface Water Drainage Notes and Specifications
THESE NOTES SHALL APPEAR ON PROJECTS FOR THE SURFACE WATER UTILITY.
1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE -
CONSTRUCTION MEETING MUST BE HELD WITH THE CITY OF RENTON PLAN
REVIEWER.
2. All construction shall be in accordance with the 1996 Standard Specifications for Road,
Bridge and Municipal Construction prepared by WSDOT and the American Public Works
Association (APWA), as amended by the City of Renton Public Works Department.
3. The surface water drainage system shall be constructed according to the approved
plans, which are on file in the Public Works Department. Any deviation from the
approved plans will require written approval from the City of Renton Public Works
Department, Surface Water Utility Section.
4. A copy of these approved plans must be on the job site whenever construction is in
progress.
5. Datum for Vertical Control shall be North American Vertical Datum 1988 Meters, and for
Horizontal Control shall be North American Datum 1983/1991 Meters unless otherwise
approved by the City of Renton Public Works Department. Reference benchmark and
elevations are noted on the plans.
6. All sedimentation/erosion facilities must be in operation prior to clearing and building
construction, and they must be satisfactorily maintained until construction is completed
and the potential for on-site erosion has passed.
7. All retention/detention facilities must be installed and in operation prior to or in
conjunction with all construction activity unless otherwise approved by the Public Works
Department, Surface Water Utility Section.
8. Grass seed may be applied by hydroseeding. The grass seed mixture, other than City of
Renton approved standard mixes, shall be submitted by a Landscape Architect and
approved by the Public Works Department, Surface Water Utility Section.
9. All pipe and appurtenances shall be laid on a properly prepared foundation in
accordance with Section 7-02.3(1) of the current State of Washington Standard
Specification for Road and Bridge Construction. This shall include necessary leveling of
the trench bottom or the top of the foundation material, as well as placement and
compaction of required bedding material, to uniform grade so that the entire length of
the pipe will be supported on a uniformly dense, unyielding base. All pipe bedding shall
be APWA Class *"C"f with the exception of PVC pipe. All trench backfill shall be
compacted to minimum 95% for pavement and structural fill and 90% otherwise per
ASTM D-1557-70. Pea gravel bedding shall be 6 inches over and under PVC pipe.
10. Galvanized steel pipe and aluminized steel pipe for all drainage facilities shall have
asphalt treatment #1 or better inside and outside.
11. Structures shall not be permitted within 10 feet of the spring line of any storm drainage
pipe, or 15 feet from the top of any channel bank.
12. All catch basin grates shall be depressed 0.10 feet below pavement level.
13. Open cut road crossings through existing public right of way will not be allowed unless
specifically approved by City of Renton Planning/Building/Public Works Administrator.
14. Rock for erosion protection of roadside ditches, where required, shall be of sound quarry
rock placed to a depth of one (1) foot and must meet the following specifications:
4 - 8 inch rock / 40 - 70% passing;
2 - 4 inch rock / 30 - 40% passing; and
less than 2 inch rock / 10 - 20% passing.
15. All building downspouts and footing drains shall be connected to the storm drainage
system, unless approved by the City plan reviewer or Surface Water Utility Section. An
accurately dimensioned, certified as -built drawing of this drainage system will be
submitted to the City upon completion.
16. Issuance of the building or construction permits by the City of Renton does not relieve
the owner of the continuing legal obligation and/or liability connected with storm surface
water disposition. Further, the City of Renton does not accept any obligation for the
proper functioning and maintenance of the system provided during construction.
17. The Contractor shall be responsible for providing adequate safeguard, safety devices,
protective equipment, flaggers, and any other needed actions to protect the life, health,
and safety of the public, and to protect property in connection with the performance of
work covered by the contract. Any work within the traveled right of way that may
interrupt normal traffic flow shall require a traffic control plan approve by the Public
Works Department, Transportation Systems Division. All sections of the WSDOT
Standard Specifications 1-07-23 Traffic Control shall apply.
18. Special drainage measures will be required if the project location is within the aquifer
protection area (APA).
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Sanitary Sewer Notes and Specifications
THESE NOTES SHALL APPEAR ON PROJECTS FOR THE WASTEWATER UTILITY.
1. All work and work material shall be in conformance with the standards and specifications
of the City of Renton Planning/Building/Public Works Department and the latest edition
of the WSDOT/APWA Standards and Specifications, as approved and modified by the
City of Renton in the Renton Standard Plans & Specifications. A set of approved plans
shall be kept on site at all times during construction.
2. The hours of work in the street right of way shall be per City specifications on weekdays
unless otherwise approved in writing by the Planning/Building/Public Works Department.
An approved traffic control plan must be obtained prior to beginning any work within
public right of way.
3. All locations of existing utilities shown are approximate and it shall be the contractor's
responsibility to verify the true and correct location so as to avoid damage or
disturbance.
4. A pre -construction conference and a 24 hour notice shall be required prior to starting
new construction. It shall be the contractor's responsibility to secure all necessary
permits prior to starting construction. (Inspection will be accomplished by a
representative of the City of Renton.) It shall be the contractor's responsibility to notify
the Public Works inspector 24 hours in advance of backfilling all construction.
5. Contractor is solely responsible for the means, methods and sequences of construction
and for the safety of workers and others on the construction site.
6. It shall be the responsibility of the contractor to obtain street use and any other related
permits prior to any construction.
7. Plans approved by the City of Renton, Public Works Department shall take precedence
over all other plans.
8. A copy of these approved plans must be on the job site whenever construction is in
progress.
9. The contractor shall provide the City of Renton with an as -built drawing of the sanitary
sewer system, which has been stamped and signed by a licensed professional engineer
or licensed professional surveyor.
10. Backfill shall be placed equally on both sides of the pipe in layers with a loose average
depth of 6 inches, maximum depth of 8 inches, thoroughly tamping each layer to 95
percent of maximum density. These compacted layers must extend for one pipe
diameter on each side of the pipe or to the side of the trench. Materials to complete the
fill over pipe shall be the same as described.
11. Open cut road crossings for utility trenches on existing traveled roadway shall be
backfilled with crushed rock and mechanically compacted unless otherwise approved by
12. Datum for Vertical Control shall be North American Vertical Datum 1988 Meters, and for
Horizontal Control shall be North American Datum 1983/1991 Meters unless otherwise
approved by the City of Renton Public Works Department. Reference benchmark and
elevations are noted on the plans.
13. All disturbed areas shall be seeded and mulched or otherwise stabilized to the
satisfaction of the Department for the prevention of on-site erosion after the completion
of construction.
14. All pipe and appurtenances shall be laid on a properly prepared foundation in
accordance with the standards and specifications of the City of Renton
Planning/Building/Public Works Department and the latest edition of the WSDOT/APWA
Standards and Specifications, as approved and modified by the City of Renton in the
Renton Standard Plans & Specifications. This shall include necessary leveling of the
trench bottom or the top of the foundation material, as well as placement and
compaction of required bedding material, to uniform grade so that the entire length of
the pipe will be supported on a uniformly dense, unyielding base. Pipe bedding shall be
pea gravel 6 inches above and below the pipe.
15. Sanitary sewer pipe shall be polyvinyl chloride (PVC) rubber gasketed ASTM D 3034,
SDR 35, or ductile iron class 50, unless otherwise approved by the Wastewater Utility.
16. In unimproved areas, manhole to extend minimum 6 inches and maximum 12 inches
above finished grade or must have minimum 2' diameter concrete ring poured at grade.
In paved area, cover must slope in all directions to match paving.
BACKFILL TO MATCH
EXISTING GRADE
EXISTING GRADE -\
VERTICAL SIDES OF TRENCH TO MINIMIZE
EXCAVATION. ADEQUATLY BRACE TO MEET ALL
SAFETY CODES AND REGULATIONS.
IMPORTED COMPACTED
BACKFILL LAID IN 8" LOOSE
LIFTS (95% MAX. DENSITY)
ORANGE GEOTEXTILE ON SIDES
AND BOTTOM. 2" MIN. LAP 0
JOINTS.
bw 1T 1- COMPACTED PIPE BEDDING IN
4" LAYE RS
ft (95% MAX DENSITY)
r. I
PIPE (W/POLYWRAP),III il 1111111111111111 QD N07e.
1'-0" 1 EXCAVATED SOIL TO BE STOCKPILED AND
MAX MAX TESTED FOR CONTAMINATION PER
ism as Ln _04 SPECIFICATIONS.
PIPE BEDDING AND BACKFILL SECTION
NOT TO SCALE
CONSTRUCTION NOTES
Erosion Control Notes
THESE NOTES SHALL APPEAR FOR ALL PROJECTS - SITE IMPROVEMENTS, SURFACE WATER
UTILITY, WASTEWATER UTILITY, WATER UTILITY, AND TRANSPORTATION PLANS:
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 operatior
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 tc
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 ar
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.
WATER PLAN GENERAL NOTES Standard Plan No. 300
1. ALL WORK AND MATERIALS SHALL BE IN ACCORDANCE WITH THE LATEST EDITION OF THE CITY OF RENTON PUBLIC WORKS
STANDARD SPECIFICATIONS AND SPECIAL PROVISIONS AND WSDOT / APWA STANDARD SPECIFICATIONS, LATEST EDITION AS
AMENDED BY THE CITY OF RENTON. A SET OF CITY APPROVED PLANS SHALL BE KEPT AT THE JOB SITE WHENEVER CONSTRUCTION
IS IN PROGRESS. A PRE -CONSTRUCTION CONFERENCE SHALL BE HELD PRIOR TO THE START OF CONSTRUCTION. THE CONTRACTOR
AND OR DEVELOPER SHALL BE RESPONSIBLE FOR SECURING ALL NECESSARY PERMITS PRIOR TO CONSTRUCTION.
2. ALL EXISTING UTILITIES SHALL REMAIN IN SERVICE DURING CONSTRUCTION UNLESS OTHERWISE NOTED. THE CONTRACTOR SHALL
CALL 1-800-424-5555 TO VERIFY UTILITY LOCATIONS BEFORE BEGINNING EXCAVATION.
3. ALL MATERIALS USED FOR THE CONSTRUCTION OF WATER SYSTEM IMPROVEMENTS SHALL BE NEW AND UNDAMAGED, AND
"CATALOG CUTS" FOR ALL MATERIALS SHALL BE APPROVED IN WRITING BY THE CITY OF RENTON PRIOR TO BRINGING ANY
MATERIALS ON-SITE.
4. ALL WATER MAIN PIPE MATERIALS SHALL BE CEMENT LINED DUCTILE IRON PIPE, THICKNESS CLASS 52 PER AWWA C 151 AND C
104. PIPE JOINTS SHALL BE PUSH -ON OR MECHANICAL JOINT. CAST IRON OR DUCTILE IRON PIPE FITTINGS SHALL BE CLASS 250 AS
PER ANSI/AWWA C110/A21.10-82. ALL DUCTILE IRON PIPE AND FITTINGS SHALL BE WRAPPED WITH 8 -MIL BLACK, TUBE -TYPE,
POLYETHYLENE PLASTIC PER AWWA C105 STANDARDS.
5. MINIMUM COVER FROM TOP OF WATER MAINS TO FINISHED GRADE SHALL BE 36 INCHES FOR PIPE DIAMETER OF 10 -INCH OR LESS
AND 48 INCHES FOR PIPE DIAMETER OF 12 -INCH AND LARGER. MAXIMUM COVER FOR ALL WATER MAINS SHALL BE 60 INCHES.
ANY DEVIATIONS MUST BE APPROVED BY THE CITY OF RENTON PRIOR TO CONSTRUCTION. WHERE UTILITY CONFLICTS OCCUR,
THE PROFILE OF THE WATER MAIN SHALL BE ADJUSTED AS NECESSARY TO CLEAR CONFLICTS AND TO PROVIDE MINIMUM COVER.
PIPE DEFLECTION SHALL NOT EXCEED ONE-HALF OF PIPE MANUFACTURER'S SPECIFICATION FOR SIZE OF PIPE USED. ALL TRENCH
BACKFILL SHALL BE COMPACTED TO 95 PERCENT MAXIMUM DRY DENSITY AS DETERMINED BY THE MODIFIED PROCTOR TEST
METHOD (MDD) IN ROADWAYS, ROADWAY SHOULDERS, ROADWAY PRISM AND DRIVEWAYS, AND 85 PERCENT MDD IN UNPAVED
AREAS. ALL PIPE ZONE COMPACTION SHALL BE 95 MDD.
6. CONCRETE BLOCKING FOR WATER MAINS SHALL BE DESIGNED, INSTALLED AND POURED IN PLACE IN ACCORDANCE WITH CITY OF
RENTON STANDARD DETAILS AND SPECIFICATIONS AND SHALL BE INSTALLED AT ALL VERTICAL AND HORIZONTAL BENDS, FITTINGS
AND BASE OF HYDRANTS. MEGA -LUGS (OR SIMILAR PRODUCT) MAYBE REQUIRED ON ALL MECHANICAL JOINTS IN ADDITION TO
CONCRETE BLOCKING.
7. ALL NEW WATER MAIN PIPES AND FITTINGS SHALL HAVE A FOAM PIPE PIG RUN THROUGH THEM PRIOR TO BEING FLUSHED,
DISINFECTED, AND TESTED. CLEANING, PRESSURE AND PURITY TESTING SHALL BE DONE IN THE PRESENCE OF AND UNDER THE
SUPERVISION OF A CITY OF RENTON UTILITY INSPECTOR. THE CONTRACTOR SHALL SUPPLY, INSTALL AND REMOVE PLUGS,
CORPORATION STOPS, BLOW -OFF ASSEMBLIES, AND THRUST RESTRAINT / BLOCKING FOR TESTING AND PURITY ACCEPTANCE. NO
CONNECTION SHALL BE MADE BETWEEN THE NEW MAIN OR BETWEEN THE NEW WET -TAP VALVE TO AN EXISTING MAIN UNTIL
THE NEW PIPING HAS BEEN FOAM -PIGGED, DISINFECTED, FLUSHED, AND PASSED BOTH PRESSURE AND PURITY TESTING.
8. NEW WATER MAINS INCLUDING SERVICE LATERALS SHALL BE TESTED AT A STATIC PRESSURE OF 150 PSI ABOVE WORKING
PRESSURE WITH A MINIMUM OF 225 PSI TEST PRESSURE FOR 120 MINUTES WITH A MAXIMUM OF 5 PSI PRESSURE DROP DURING
THE ENTIRE TEST PERIOD. UPON SATISFACTORY COMPLETION OF THE PRESSURE TEST, THE LINE SHALL BE DISINFECTED, FLUSHED,
AND THEN WATER SAMPLES SHALL BE TAKEN FOR PURITY TESTING BY THE PUBLIC WORKS INSPECTOR.
9. THE CONTRACTOR SHALL NOTIFY THE CITY OF RENTON WATER UTILITY AND MAINTENANCE DEPARTMENTS AT LEAST 10 WORKING
DAYS PRIOR TO MAKING CONNECTIONS TO THE EXISTING WATER SYSTEM. THE CONTRACTOR SHALL EXPOSE THE EXISTING WATER
MAIN AND FITTINGS AT THE CONNECTION POINT BEFORE ORDERING THE NECESSARY ADAPTORS AND FITTINGS REQUIRED FOR
THE FINAL CONNECTION. THE CONTRACTOR SHALL EXCAVATE, REMOVE ALL SURFACE MATERIALS, AND PROVIDE SHORING AND
ALL MATERIALS REQUIRED FOR THE CITY OF RENTON TO PERFORM THE CONNECTION TO THE EXISTING WATER SYSTEM. THE
CONTRACTOR SHALL PROVIDE AND INSTALL BACKFILL, CONCRETE BLOCKING, AND COMPLETE SURFACE RESTORATION.
+ + PUBLIC WORKS
DEPARTMENT
WATER F4.AN GENEIRAL NOTES
1.1 V 11 a; J F1 Z M 12 wl#T#Vl J
MARCH 2010
Surface Water Drainage Notes and Specifications
THESE NOTES SHALL APPEAR ON PROJECTS FOR THE SURFACE WATER UTILITY.
1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE -
CONSTRUCTION MEETING MUST BE HELD WITH THE CITY OF RENTON PLAN
REVIEWER.
2. All construction shall be in accordance with the 1996 Standard Specifications for Road,
Bridge and Municipal Construction prepared by WSDOT and the American Public Works
Association (APWA), as amended by the City of Renton Public Works Department.
3. The surface water drainage system shall be constructed according to the approved
plans, which are on file in the Public Works Department. Any deviation from the
approved plans will require written approval from the City of Renton Public Works
Department, Surface Water Utility Section.
4. A copy of these approved plans must be on the job site whenever construction is in
progress.
5. Datum for Vertical Control shall be North American Vertical Datum 1988 Meters, and for
Horizontal Control shall be North American Datum 1983/1991 Meters unless otherwise
approved by the City of Renton Public Works Department. Reference benchmark and
elevations are noted on the plans.
6. All sedimentation/erosion facilities must be in operation prior to clearing and building
construction, and they must be satisfactorily maintained until construction is completed
and the potential for on-site erosion has passed.
7. All retention/detention facilities must be installed and in operation prior to or in
conjunction with all construction activity unless otherwise approved by the Public Works
Department, Surface Water Utility Section.
8. Grass seed may be applied by hydroseeding. The grass seed mixture, other than City of
Renton approved standard mixes, shall be submitted by a Landscape Architect and
approved by the Public Works Department, Surface Water Utility Section.
9. All pipe and appurtenances shall be laid on a properly prepared foundation in
accordance with Section 7-02.3(1) of the current State of Washington Standard
Specification for Road and Bridge Construction. This shall include necessary leveling of
the trench bottom or the top of the foundation material, as well as placement and
compaction of required bedding material, to uniform grade so that the entire length of
the pipe will be supported on a uniformly dense, unyielding base. All pipe bedding shall
be APWA Class *"C"f with the exception of PVC pipe. All trench backfill shall be
compacted to minimum 95% for pavement and structural fill and 90% otherwise per
ASTM D-1557-70. Pea gravel bedding shall be 6 inches over and under PVC pipe.
10. Galvanized steel pipe and aluminized steel pipe for all drainage facilities shall have
asphalt treatment #1 or better inside and outside.
11. Structures shall not be permitted within 10 feet of the spring line of any storm drainage
pipe, or 15 feet from the top of any channel bank.
12. All catch basin grates shall be depressed 0.10 feet below pavement level.
13. Open cut road crossings through existing public right of way will not be allowed unless
specifically approved by City of Renton Planning/Building/Public Works Administrator.
14. Rock for erosion protection of roadside ditches, where required, shall be of sound quarry
rock placed to a depth of one (1) foot and must meet the following specifications:
4 - 8 inch rock / 40 - 70% passing;
2 - 4 inch rock / 30 - 40% passing; and
less than 2 inch rock / 10 - 20% passing.
15. All building downspouts and footing drains shall be connected to the storm drainage
system, unless approved by the City plan reviewer or Surface Water Utility Section. An
accurately dimensioned, certified as -built drawing of this drainage system will be
submitted to the City upon completion.
16. Issuance of the building or construction permits by the City of Renton does not relieve
the owner of the continuing legal obligation and/or liability connected with storm surface
water disposition. Further, the City of Renton does not accept any obligation for the
proper functioning and maintenance of the system provided during construction.
17. The Contractor shall be responsible for providing adequate safeguard, safety devices,
protective equipment, flaggers, and any other needed actions to protect the life, health,
and safety of the public, and to protect property in connection with the performance of
work covered by the contract. Any work within the traveled right of way that may
interrupt normal traffic flow shall require a traffic control plan approve by the Public
Works Department, Transportation Systems Division. All sections of the WSDOT
Standard Specifications 1-07-23 Traffic Control shall apply.
18. Special drainage measures will be required if the project location is within the aquifer
protection area (APA).
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Sanitary Sewer Notes and Specifications
THESE NOTES SHALL APPEAR ON PROJECTS FOR THE WASTEWATER UTILITY.
1. All work and work material shall be in conformance with the standards and specifications
of the City of Renton Planning/Building/Public Works Department and the latest edition
of the WSDOT/APWA Standards and Specifications, as approved and modified by the
City of Renton in the Renton Standard Plans & Specifications. A set of approved plans
shall be kept on site at all times during construction.
2. The hours of work in the street right of way shall be per City specifications on weekdays
unless otherwise approved in writing by the Planning/Building/Public Works Department.
An approved traffic control plan must be obtained prior to beginning any work within
public right of way.
3. All locations of existing utilities shown are approximate and it shall be the contractor's
responsibility to verify the true and correct location so as to avoid damage or
disturbance.
4. A pre -construction conference and a 24 hour notice shall be required prior to starting
new construction. It shall be the contractor's responsibility to secure all necessary
permits prior to starting construction. (Inspection will be accomplished by a
representative of the City of Renton.) It shall be the contractor's responsibility to notify
the Public Works inspector 24 hours in advance of backfilling all construction.
5. Contractor is solely responsible for the means, methods and sequences of construction
and for the safety of workers and others on the construction site.
6. It shall be the responsibility of the contractor to obtain street use and any other related
permits prior to any construction.
7. Plans approved by the City of Renton, Public Works Department shall take precedence
over all other plans.
8. A copy of these approved plans must be on the job site whenever construction is in
progress.
9. The contractor shall provide the City of Renton with an as -built drawing of the sanitary
sewer system, which has been stamped and signed by a licensed professional engineer
or licensed professional surveyor.
10. Backfill shall be placed equally on both sides of the pipe in layers with a loose average
depth of 6 inches, maximum depth of 8 inches, thoroughly tamping each layer to 95
percent of maximum density. These compacted layers must extend for one pipe
diameter on each side of the pipe or to the side of the trench. Materials to complete the
fill over pipe shall be the same as described.
11. Open cut road crossings for utility trenches on existing traveled roadway shall be
backfilled with crushed rock and mechanically compacted unless otherwise approved by
12. Datum for Vertical Control shall be North American Vertical Datum 1988 Meters, and for
Horizontal Control shall be North American Datum 1983/1991 Meters unless otherwise
approved by the City of Renton Public Works Department. Reference benchmark and
elevations are noted on the plans.
13. All disturbed areas shall be seeded and mulched or otherwise stabilized to the
satisfaction of the Department for the prevention of on-site erosion after the completion
of construction.
14. All pipe and appurtenances shall be laid on a properly prepared foundation in
accordance with the standards and specifications of the City of Renton
Planning/Building/Public Works Department and the latest edition of the WSDOT/APWA
Standards and Specifications, as approved and modified by the City of Renton in the
Renton Standard Plans & Specifications. This shall include necessary leveling of the
trench bottom or the top of the foundation material, as well as placement and
compaction of required bedding material, to uniform grade so that the entire length of
the pipe will be supported on a uniformly dense, unyielding base. Pipe bedding shall be
pea gravel 6 inches above and below the pipe.
15. Sanitary sewer pipe shall be polyvinyl chloride (PVC) rubber gasketed ASTM D 3034,
SDR 35, or ductile iron class 50, unless otherwise approved by the Wastewater Utility.
16. In unimproved areas, manhole to extend minimum 6 inches and maximum 12 inches
above finished grade or must have minimum 2' diameter concrete ring poured at grade.
In paved area, cover must slope in all directions to match paving.
BACKFILL TO MATCH
EXISTING GRADE
EXISTING GRADE -\
VERTICAL SIDES OF TRENCH TO MINIMIZE
EXCAVATION. ADEQUATLY BRACE TO MEET ALL
SAFETY CODES AND REGULATIONS.
IMPORTED COMPACTED
BACKFILL LAID IN 8" LOOSE
LIFTS (95% MAX. DENSITY)
ORANGE GEOTEXTILE ON SIDES
AND BOTTOM. 2" MIN. LAP 0
JOINTS.
bw 1T 1- COMPACTED PIPE BEDDING IN
4" LAYE RS
ft (95% MAX DENSITY)
r. I
PIPE (W/POLYWRAP),III il 1111111111111111 QD N07e.
1'-0" 1 EXCAVATED SOIL TO BE STOCKPILED AND
MAX MAX TESTED FOR CONTAMINATION PER
ism as Ln _04 SPECIFICATIONS.
PIPE BEDDING AND BACKFILL SECTION
NOT TO SCALE
CONSTRUCTION NOTES
Erosion Control Notes
THESE NOTES SHALL APPEAR FOR ALL PROJECTS - SITE IMPROVEMENTS, SURFACE WATER
UTILITY, WASTEWATER UTILITY, WATER UTILITY, AND TRANSPORTATION PLANS:
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 operatior
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 tc
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 ar
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.
WATER PLAN GENERAL NOTES Standard Plan No. 300
1. ALL WORK AND MATERIALS SHALL BE IN ACCORDANCE WITH THE LATEST EDITION OF THE CITY OF RENTON PUBLIC WORKS
STANDARD SPECIFICATIONS AND SPECIAL PROVISIONS AND WSDOT / APWA STANDARD SPECIFICATIONS, LATEST EDITION AS
AMENDED BY THE CITY OF RENTON. A SET OF CITY APPROVED PLANS SHALL BE KEPT AT THE JOB SITE WHENEVER CONSTRUCTION
IS IN PROGRESS. A PRE -CONSTRUCTION CONFERENCE SHALL BE HELD PRIOR TO THE START OF CONSTRUCTION. THE CONTRACTOR
AND OR DEVELOPER SHALL BE RESPONSIBLE FOR SECURING ALL NECESSARY PERMITS PRIOR TO CONSTRUCTION.
2. ALL EXISTING UTILITIES SHALL REMAIN IN SERVICE DURING CONSTRUCTION UNLESS OTHERWISE NOTED. THE CONTRACTOR SHALL
CALL 1-800-424-5555 TO VERIFY UTILITY LOCATIONS BEFORE BEGINNING EXCAVATION.
3. ALL MATERIALS USED FOR THE CONSTRUCTION OF WATER SYSTEM IMPROVEMENTS SHALL BE NEW AND UNDAMAGED, AND
"CATALOG CUTS" FOR ALL MATERIALS SHALL BE APPROVED IN WRITING BY THE CITY OF RENTON PRIOR TO BRINGING ANY
MATERIALS ON-SITE.
4. ALL WATER MAIN PIPE MATERIALS SHALL BE CEMENT LINED DUCTILE IRON PIPE, THICKNESS CLASS 52 PER AWWA C 151 AND C
104. PIPE JOINTS SHALL BE PUSH -ON OR MECHANICAL JOINT. CAST IRON OR DUCTILE IRON PIPE FITTINGS SHALL BE CLASS 250 AS
PER ANSI/AWWA C110/A21.10-82. ALL DUCTILE IRON PIPE AND FITTINGS SHALL BE WRAPPED WITH 8 -MIL BLACK, TUBE -TYPE,
POLYETHYLENE PLASTIC PER AWWA C105 STANDARDS.
5. MINIMUM COVER FROM TOP OF WATER MAINS TO FINISHED GRADE SHALL BE 36 INCHES FOR PIPE DIAMETER OF 10 -INCH OR LESS
AND 48 INCHES FOR PIPE DIAMETER OF 12 -INCH AND LARGER. MAXIMUM COVER FOR ALL WATER MAINS SHALL BE 60 INCHES.
ANY DEVIATIONS MUST BE APPROVED BY THE CITY OF RENTON PRIOR TO CONSTRUCTION. WHERE UTILITY CONFLICTS OCCUR,
THE PROFILE OF THE WATER MAIN SHALL BE ADJUSTED AS NECESSARY TO CLEAR CONFLICTS AND TO PROVIDE MINIMUM COVER.
PIPE DEFLECTION SHALL NOT EXCEED ONE-HALF OF PIPE MANUFACTURER'S SPECIFICATION FOR SIZE OF PIPE USED. ALL TRENCH
BACKFILL SHALL BE COMPACTED TO 95 PERCENT MAXIMUM DRY DENSITY AS DETERMINED BY THE MODIFIED PROCTOR TEST
METHOD (MDD) IN ROADWAYS, ROADWAY SHOULDERS, ROADWAY PRISM AND DRIVEWAYS, AND 85 PERCENT MDD IN UNPAVED
AREAS. ALL PIPE ZONE COMPACTION SHALL BE 95 MDD.
6. CONCRETE BLOCKING FOR WATER MAINS SHALL BE DESIGNED, INSTALLED AND POURED IN PLACE IN ACCORDANCE WITH CITY OF
RENTON STANDARD DETAILS AND SPECIFICATIONS AND SHALL BE INSTALLED AT ALL VERTICAL AND HORIZONTAL BENDS, FITTINGS
AND BASE OF HYDRANTS. MEGA -LUGS (OR SIMILAR PRODUCT) MAYBE REQUIRED ON ALL MECHANICAL JOINTS IN ADDITION TO
CONCRETE BLOCKING.
7. ALL NEW WATER MAIN PIPES AND FITTINGS SHALL HAVE A FOAM PIPE PIG RUN THROUGH THEM PRIOR TO BEING FLUSHED,
DISINFECTED, AND TESTED. CLEANING, PRESSURE AND PURITY TESTING SHALL BE DONE IN THE PRESENCE OF AND UNDER THE
SUPERVISION OF A CITY OF RENTON UTILITY INSPECTOR. THE CONTRACTOR SHALL SUPPLY, INSTALL AND REMOVE PLUGS,
CORPORATION STOPS, BLOW -OFF ASSEMBLIES, AND THRUST RESTRAINT / BLOCKING FOR TESTING AND PURITY ACCEPTANCE. NO
CONNECTION SHALL BE MADE BETWEEN THE NEW MAIN OR BETWEEN THE NEW WET -TAP VALVE TO AN EXISTING MAIN UNTIL
THE NEW PIPING HAS BEEN FOAM -PIGGED, DISINFECTED, FLUSHED, AND PASSED BOTH PRESSURE AND PURITY TESTING.
8. NEW WATER MAINS INCLUDING SERVICE LATERALS SHALL BE TESTED AT A STATIC PRESSURE OF 150 PSI ABOVE WORKING
PRESSURE WITH A MINIMUM OF 225 PSI TEST PRESSURE FOR 120 MINUTES WITH A MAXIMUM OF 5 PSI PRESSURE DROP DURING
THE ENTIRE TEST PERIOD. UPON SATISFACTORY COMPLETION OF THE PRESSURE TEST, THE LINE SHALL BE DISINFECTED, FLUSHED,
AND THEN WATER SAMPLES SHALL BE TAKEN FOR PURITY TESTING BY THE PUBLIC WORKS INSPECTOR.
9. THE CONTRACTOR SHALL NOTIFY THE CITY OF RENTON WATER UTILITY AND MAINTENANCE DEPARTMENTS AT LEAST 10 WORKING
DAYS PRIOR TO MAKING CONNECTIONS TO THE EXISTING WATER SYSTEM. THE CONTRACTOR SHALL EXPOSE THE EXISTING WATER
MAIN AND FITTINGS AT THE CONNECTION POINT BEFORE ORDERING THE NECESSARY ADAPTORS AND FITTINGS REQUIRED FOR
THE FINAL CONNECTION. THE CONTRACTOR SHALL EXCAVATE, REMOVE ALL SURFACE MATERIALS, AND PROVIDE SHORING AND
ALL MATERIALS REQUIRED FOR THE CITY OF RENTON TO PERFORM THE CONNECTION TO THE EXISTING WATER SYSTEM. THE
CONTRACTOR SHALL PROVIDE AND INSTALL BACKFILL, CONCRETE BLOCKING, AND COMPLETE SURFACE RESTORATION.
+ + PUBLIC WORKS
DEPARTMENT
WATER F4.AN GENEIRAL NOTES
1.1 V 11 a; J F1 Z M 12 wl#T#Vl J
MARCH 2010
Surface Water Drainage Notes and Specifications
THESE NOTES SHALL APPEAR ON PROJECTS FOR THE SURFACE WATER UTILITY.
1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE -
CONSTRUCTION MEETING MUST BE HELD WITH THE CITY OF RENTON PLAN
REVIEWER.
2. All construction shall be in accordance with the 1996 Standard Specifications for Road,
Bridge and Municipal Construction prepared by WSDOT and the American Public Works
Association (APWA), as amended by the City of Renton Public Works Department.
3. The surface water drainage system shall be constructed according to the approved
plans, which are on file in the Public Works Department. Any deviation from the
approved plans will require written approval from the City of Renton Public Works
Department, Surface Water Utility Section.
4. A copy of these approved plans must be on the job site whenever construction is in
progress.
5. Datum for Vertical Control shall be North American Vertical Datum 1988 Meters, and for
Horizontal Control shall be North American Datum 1983/1991 Meters unless otherwise
approved by the City of Renton Public Works Department. Reference benchmark and
elevations are noted on the plans.
6. All sedimentation/erosion facilities must be in operation prior to clearing and building
construction, and they must be satisfactorily maintained until construction is completed
and the potential for on-site erosion has passed.
7. All retention/detention facilities must be installed and in operation prior to or in
conjunction with all construction activity unless otherwise approved by the Public Works
Department, Surface Water Utility Section.
8. Grass seed may be applied by hydroseeding. The grass seed mixture, other than City of
Renton approved standard mixes, shall be submitted by a Landscape Architect and
approved by the Public Works Department, Surface Water Utility Section.
9. All pipe and appurtenances shall be laid on a properly prepared foundation in
accordance with Section 7-02.3(1) of the current State of Washington Standard
Specification for Road and Bridge Construction. This shall include necessary leveling of
the trench bottom or the top of the foundation material, as well as placement and
compaction of required bedding material, to uniform grade so that the entire length of
the pipe will be supported on a uniformly dense, unyielding base. All pipe bedding shall
be APWA Class *"C"f with the exception of PVC pipe. All trench backfill shall be
compacted to minimum 95% for pavement and structural fill and 90% otherwise per
ASTM D-1557-70. Pea gravel bedding shall be 6 inches over and under PVC pipe.
10. Galvanized steel pipe and aluminized steel pipe for all drainage facilities shall have
asphalt treatment #1 or better inside and outside.
11. Structures shall not be permitted within 10 feet of the spring line of any storm drainage
pipe, or 15 feet from the top of any channel bank.
12. All catch basin grates shall be depressed 0.10 feet below pavement level.
13. Open cut road crossings through existing public right of way will not be allowed unless
specifically approved by City of Renton Planning/Building/Public Works Administrator.
14. Rock for erosion protection of roadside ditches, where required, shall be of sound quarry
rock placed to a depth of one (1) foot and must meet the following specifications:
4 - 8 inch rock / 40 - 70% passing;
2 - 4 inch rock / 30 - 40% passing; and
less than 2 inch rock / 10 - 20% passing.
15. All building downspouts and footing drains shall be connected to the storm drainage
system, unless approved by the City plan reviewer or Surface Water Utility Section. An
accurately dimensioned, certified as -built drawing of this drainage system will be
submitted to the City upon completion.
16. Issuance of the building or construction permits by the City of Renton does not relieve
the owner of the continuing legal obligation and/or liability connected with storm surface
water disposition. Further, the City of Renton does not accept any obligation for the
proper functioning and maintenance of the system provided during construction.
17. The Contractor shall be responsible for providing adequate safeguard, safety devices,
protective equipment, flaggers, and any other needed actions to protect the life, health,
and safety of the public, and to protect property in connection with the performance of
work covered by the contract. Any work within the traveled right of way that may
interrupt normal traffic flow shall require a traffic control plan approve by the Public
Works Department, Transportation Systems Division. All sections of the WSDOT
Standard Specifications 1-07-23 Traffic Control shall apply.
18. Special drainage measures will be required if the project location is within the aquifer
protection area (APA).
By:
By:
By:
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