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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.
Surface Water Standard Plan Notes CONSTRUCTION N
1. These notes shall appear on projects for the surface water utility.
2. Before any construction or development activity occurs, a pre -construction meeting
must be held between the City of Renton plan review section and the applicant.
3. All design and construction shall be in accordance with the Renton Municipal Code
(RMC), the latest edition of the 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. It
shall be the sole responsibility of the applicant and the professional civil engineer to
correct any error, omission or variation from the above requirements found in this
plans. all corrections shall be at no additional cost to the City.
4. Approval of this road, grading, parking and drainage plan does not constitute an
approval of any other construction (e.g. domestic water conveyance, sewer
conveyance, gas, electrical. etc.)The surface water drainage system shall be
constructed according to the approved plans, which are on file in with the City. Any
deviation from the approved plans will require written approval from the City of
Renton Public Works Department, Surface Water Utility Section.
5. A copy of these approved plans must be on the job site whenever construction is in
progress.
6. Grading activities (site alteration) are limited to the hours of 7 a.m. to 7 p.m.
Monday through Saturday and no work on Sunday is allowed, unless otherwise
approved with a written decision by the City of Renton.
7. It shall be the applicant's/contractor's responsibility to obtain all construction
easements necessary before initiating off-site work. Easements require City review
and approval prior to construction.
8. Franchised utilities or other installations that are not shown on these approved plans
shall not be constructed unless an approved set of plans that meet all requirements
of Chapter 4 of the Surface Water Design Manual are submitted to the City of
Renton.
9. Datum shall be NAVD 88 unless otherwise approved by the City of Renton.
Reference benchmark and elevations are noted on the plans.
10. Any dewatering system necessary for the construction of stormwater facilities must
be submitted to the City for review and approval.
11. All utility trenches and roadway subgrade shall be backfilled and compacted to
95 percent density, standard proctor.
12. Open cutting of existing roadways for non -franchised utility or storm drainage work
is not allowed unless specifically approved by the City of Renton and noted on these
approved plans. Any open cut shall be restored in accordance with the City of
Renton trench restoration standards.
13. 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.
14. 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.
15. All pipe and appurtenances shall be laid on a properly prepared foundation in
accordance with 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", with the exception of PVC pipe.
16. Steel pipe shall be aluminized, or galvanized with asphalt treatment #1 or better
inside and outside.
17. All drainage structures, such as catch basins and manholes shall have solid locking
lids. All drainage structures associated with a permanent retention/detention facility
shall have solid locking lids.
18. Building and other structures shall be placed in accordance with Table 4.1 Easement
Widths and Building Setbacks Lines.
19. All catch basin grates shall be depressed 0.10 feet below pavement level.
20. All driveway culverts located within City of Renton right-of-way shall be of sufficient
length to provide a minimum 3:1 slope from the edge of the driveway to the bottom
of the ditch. 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.
21. 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.
22. Drainage outlets (stub -outs) shall be provided for each individual lot, except for
those lots approved for infiltration by the City. Stub -outs shall conform to the
following:
a. Each outlet shall be suitably located at the lowest elevation on the lot, so as to
service all future roof downspouts and footing drains, driveways, yard drains,
and any other surface or subsurface drains necessary to render the lots suitable
for their intended use. Each outlet shall have free-flowing, positive drainage to
an approved stormwater conveyance system or to an approved outfall location.
b. Outlets on each lot shall be located with a five -foot -high, 2" x 4" stake marked
"storm" or "drain". The stub -out shall extend above surface level, be visible, and
be secured to the stake.
c. Pipe material shall conform to underdrain specifications described in Chapter 4 of
the Surface Water Design Manual and, if non-metallic, the pipe shall be placed in
a trench with a tracing wire above or other acceptable detection.
d. Private drainage easements are required for drainage systems designed to
convey flows through individual lots.
e. The applicant/contractor is responsible for coordinating the locations of all stub -
out conveyance lines with respect to other utilities (e.g. power, gas, telephone,
television).
f. All individual stub -outs shall be privately owned and maintained by the lot home
owner.
g. Storm drainage pipe systems shall not penetrate building foundations, except for
sump pump discharge lines used to drain crawl spaces, provided the sump pump
system includes backflow prevention or a check valve.
23. All disturbed pervious areas (compacted, graded, landscaped, etc.) of the
development site must demonstrate one of the following: The existing duff layer
shall be staged and redistributed to maintain the moisture capacity of the soil, OR;
Amended soil shall be added to maintain the moisture capacity.
24. Proof of liability insurance shall be submitted to the City prior to construction permit
issuance.
25. 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.
26. 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. 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.
27. Project located within the aquifer protection area (APA) shall comply with Special
Requirement #6 of the Surface Water Design Manual and Aquifer Protection
Regulations (RMC 4-3-050).
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.
S. 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 BYTHE 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 BYTHE 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.
STD. PLAN - 300.0
PUBLIC WORKSWATER PLAN GENERAL NOTES
DEPARTMENT
csx,�*-%
MARCH 2010
SURVEYED: SCALE:
VERTICAL: NAVD 1988
NA HORIZONTAL: NAD 1983/1991
DESIGNED:
KEH
DRAWN:
RDC/KEH I ONE INCH DATUM
CHECKED: AT FULL SCALE
KEH IF NOT ONE INCH
N 0. REVISION BY DATE AP P R APPROVED: SCALE ACCORDINGLY
JGH
Erosion 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/ESC 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.
C TY OF
RENTON
Planning/Building/Public Works Dept,
RECOMMENDED FOR APPROVAL
By: Date:
By: Date:
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(425)251-6222
(425)251-8782 FAX
CIVIL ENGINEERING, LAND PLANNING,
SURVEYING, ENVIRONMENTAL SERVICES
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Project #: 12740
oaress:
4815 NE 4TH AVE
RENTON, WA
CONSTRUCTION
NOTES
wing No.:
By: Date C16 of 25
By: Date
DATE:
AS BUILT S TORAG E ONE ON 4TH EXPANSION
PenWt NO. U 15008468 FIELDBOOK:
PAGE:
DRAWING N0:
4815 NE 4TH AVE
R-389614