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Surface Water Standard Plan Notes
A portion 0f the NW 1/4 0f
the
NE 1/4
0f Section 32, Township 23 N. , Range 5 ]E., W.M.
City
0f
Benson,
]King County, Washington
Erosion Control Notes
1. These notes shall appear on projects for the surface water utility.
18.
Building and other structures shall be placed in accordance with Table 4.1
1.
These notes shall appear for all projects - site improvements, surface water utility, wastewater
2. Before any construction or development activity occurs, apre-construction meeting
Easement Widths and Building Setbacks Lines.
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2.
utility, water utility, and transportation plans:
Before any construction or development activity occurs, apre-construction meeting must be held
must be held between the City of Renton plan review section and the applicant.
19.
All catch basin grates shall be depressed 0.10 feet below pavement level.
with the City of Renton, public works design engineer.
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3. All design and construction shall be in accordance with the Renton Municipal Code
20.
All driveway culverts located within City of Renton right-of-way shall be of sufficient
3.
The Boundaries of the clearing limits and areas of vegetation preservation as prescribed on the
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(RMC), the latest edition of the Standard Specifications for Road, Bridge and
length to provide a minimum 3:1 slope from the edge of the driveway to the bottom
plan(s) shall be clearly flagged by survey tape or fencing in the field prior to construction in
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Municipal Construction prepared by WSDOT and the American Public Works
of the ditch. Rock for erosion protection of roadside ditches, where required, shall be
accordance with Appendix D of the Surface Water Design Manual and observed during
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Association (APWA), as amended by the City of Renton Public Works Department.
of sound quarry rock placed to a depth of one (1) foot and must meet the following
construction. During the construction period, no disturbance beyond the clearing limits shall be
It shall be the sole responsibility of the applicant and the professional civil engineer
specifications: 4 - 8 inch rock / 40 - 70% passing; 2 - 4 inch rock / 30 - 40% passing;
permitted. The clearing limits shall be maintained by the applicant/ESC supervisor for the duration
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to correct any error, omission or variation from the above requirements found in this
and less than 2 inch rock / 10 - 20% passing.
4.
S construction.
Stabilized construction entrances shall be installed at the beginning of construction and maintained
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plans. All corrections shall be at no additional cost to the City.
for the duration of the project. Additional measures, such as constructed wheel wash systems or
4. Approval of this road, grading, parking and drainage plan does not constitute an
21.
All building downspouts and footing drains shall be connected to the storm drainage
wash pads, may be required to ensure that all paved areas are kept clean and track out to road
approval of any other construction (e.g. domestic water conveyance, sewer
system, unless approved by the City plan reviewer or Surface Water Utility Section.
right of way does not occur for the duration of the project.
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conveyance, gas, electrical. etc.)The surface water drainage system shall be
An accurately dimensioned, certified as -built drawing of this drainage system will be
5.
All required sedimentation/erosion control facilities must be constructed and in operation prior to
constructed according to the approved plans, which are on file in with the City. Any
submitted to the Cityu
upon completion.
land clearing and/or construction to prevent transportation of sediment to surface water, drainage
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deviation from the approved plans will require written approval from the City of
22.
Drainage outlets (stub -outs) shall be provided for each individual lot, except for
systems and adjacent properties. All erosion and sediment facilities shall be maintained in a
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Renton Public Works Department, Surface Water Utility Section.
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those lots approved for infiltration by the City. Stub -outs shall conform to the
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
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5. A co of these approved plans must be on the job site whenever construction is in
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following:
erosion/sedimentation control systems shall be the responsibility of the permitee.
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progress.
a.
Each outlet shall be suitably located at the lowest elevation On the lot, SO as to
6.
The erosion and sedimentation control systems depicted on this drawing are intended to be
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6. Grading activities (site alteration) are limited to the hours of 7 a.m. to 7 p.m. Monday
service all future roof downspouts and footing drains, driveways, yard drains, and
minimum requirements to meet anticipated site conditions. As construction progresses and
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through Saturday and no work on Sunday is allowed, unless otherwise approved
any other surface or subsurface drains necessary to render the lots suitable for their
unexpected or seasonal conditions dictate, the permitee shall anticipate that more erosion and
facilities be to the
with a written decision by the City of Renton.
intended use. Each outlet shall have free -flowing, positive drainage to an approved
sedimentation control will necessary ensure complete siltation control on
7. It shall be the applicant's/contractor's responsibility to obtain all construction
conveyance
stormwater conve system or to an approved outfall location.
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proposed site. During the course of construction, it shall be the obligation and responsibility of the
easements necessary before initiating off -site work. Easements require City review
b.
Outlets on each lot shall be located with afive-foot-high, 2" x 4" stake marked
permitee to address any new conditions that may be created by the activities and to provideadditional facilities, over and above minimum requirements, as may be needed, to protect adjacent
and approval prior to construction.
"storm" or "drain". The stub -out shall extend above surface level, be visible, and be
properties and water quality of the receiving drainage system.
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8. Franchised utilities or other installations that are not shown on these approved plans
secured to the stake.
7.
Approval of this plan is for erosion/sedimentation control only. It does not constitute an approval of
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shall not be constructed unless an approved set of plans that meet all requirements
C.
Pipe material shall conform to underdrain specifications described in Chapter 4 of
storm drainage design, size nor location of pipes, restrictors, channels, or retention facilities.
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of Chapter 4 of the Surface Water Design Manual are submitted to the City of
the Surface Water Design Manual and, if non-metallic, the pipe shall be placed in a
8.
Any areas of exposed soils, including roadway embankments, that will not be disturbed for two days
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Renton.
trench with a tracing wire above Or other acceptable detection.
during the wet season (October 1sttrough March 30th) or seven days during the dry season (April
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9. Datum shall be NAVD 88 unless otherwise approved by the City of Renton.
d.
Private drainage easements are required for drainage systems designed to convey
1 st through September 30) shall be immediately stabilized with the approved ESC cover methods
Reference benchmark and elevations are noted on the plans.
flows through individual lots.
9.
(e.g., seeding, mulching, plastic covering, etc.).
Wet season seasonal erosion and sediment control requirements apply to all construction sites
10. Any dewatering system necessary for the construction of stormwater facilities must
e.
The applicant/contractor is responsible for coordinating the locations of all stub -out
clearing between October 1 and March 30 inclusive, unless otherwise approved by the City through
be submitted to the City for review and approval.
conveyance lines with respect to other utilities (e.g. power, gas, telephone,
an adjustment process.
11. All utility trenches and roadway subgrades hall be backfilled and compacted to 95
television).
10.
Cover measures will be applied in conformance with Appendix D of the Surface Water Design
percent density, standard proctor.
f.
All individual stub -outs shall be privately owned and maintained by the lot home
Manual.
12. Open cutting of existing roadways for non -franchised utility or storm drainage work
owner.
11.
Any area needing ESC measures, not requiring immediate attention, shall be addressed within
is not allowed unless specifically approved by the City of Renton and noted on these
9•
Storm drainage pipe systems shall not penetrate building foundations, except for
12.
seven (7) days.
The ESC facilities on inactive sites shall be inspected and maintained a minimum of once a month
approved plans. Any open cut shall be restored in accordance with the City of
Sum um discharge lines used to drain crawl spaces, provided the sum um
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or within 24 hours following a storm event.
Renton trench restoration standards.
system includes backflow prevention or a check valve.
13.
At no time shall more than one (1) foot of sediment be allowed to accumulate within a catch basin.
13. All sedimentation/erosion facilities must be in operation prior to clearing and building
23.
All disturbed pervious areas (compacted, graded, landscaped, etc.) of the
All catch basins and conveyance lines shall be cleaned prior to paving. The cleaning operation shall
construction, and they must be satisfactorily maintained until construction is
development site must demonstrate one of the following: The existing duff layer
not flush sediment -laden water into the downstream system.
completed and the potential for on -site erosion has passed.
shall be staged and redistributed to maintain the moisture capacity of the soil, OR;
14.
During the time period of October 1st through March 30th, all project distributed soil areas greater,
14. All retention/detention facilities must be installed and in operation prior to or in
Amended soil shall be added to maintain the moisture capacity.
that are to be left un-worked for more than 12 hours, shall be covered by mulch, sodding or plastic
conjunction with all construction activity unless otherwise approved by the Public
24.
Proof of liability insurance shall be submitted to the City prior to construction permit
15.
covering.
Any permanent retention/detention facility used as a temporary settling basin shall be modified with
Works Department, Surface Water Utility Section.
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issuance.
the necessary erosion control measures and shall provide adequate storage capacity. If the
25.
Issuance Of the building Or construction permits by the City Of Renton does not
permanent facility is to function ultimately as an infiltration system, the temporary facility must be
15. All pipe and appurtenances shall be laid on a properly prepared foundation in
relieve the owner of the continuing legal obligation and/or liability connected with
rough graded so that the bottom and sides are at least three feet above the final grade of the
accordance with the current State of Washington Standard Specification for Road
storm surface water disposition. Further, the City of Renton does not accept any
permanent facility.
and Bridge Construction. This shall include necessary leveling of the trench bottom
obligation for the proper functioning and maintenance of the system provided during
16.
Prior to the beginning of the wet season (Oct. 1), all disturbed areas shall be reviewed to identify
or the top of the foundation material, as well as placement and compaction of
construction.
which ones can be seeded in preparation for the winter rains. Disturbed areas shall be seeded
required bedding material, to uniform grade so that the entire length of the pipe will
26.
The Contractor shall be responsible for providing adequate safeguard, safety
within one week of the beginning of the wet season. A sketch map of those areas to be seeded and
be supported on a uniformly dense, unyielding base. All pipe bedding shall beg9
devices, protective equipment, fla ers, and an other needed actions to protect the
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those areas to remain uncovered shall be submitted to the City of Renton for review.
APWA Class "C", with the exception of PVC pipe.
life, health, and safety of the public, and to protect property in connection with the
16. Steel pipe shall be aluminized, or galvanized with asphalt treatment #1 or better
performance of work. Any work within the traveled right-of-way that may interrupt
STRUCTURAL NOTES
inside and outside.
normal traffic flow shall require a traffic control plan approve by the Public Works
17. All drainage structures, such as catch basins and manholes shall have solid locking
Department, Transportation Systems Division. All sections of the WSDOT Standard
1.
These plans are approved for standard road and drainage improvements only. Plans for
lids. All drainage structures associated with a permanent retention/detention facility
Specifications 1-07-23.Traffic Control shall apply.
structures such as bridges, vaults, and retaining walls require a separate review and approval
shall have solid locking lids.
27.
Project located within the aquifer protection area (APA) shall comply with Special
by the City prior to construction.
Requirement #6 of the Surface Water Design Manual and Aquifer Protection
2.
Rockeries are considered to be a method of bank stabilization and erosion control. Rockeries
Regulations (RMC 4-3-050).
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.
NO. I REVISION I BY
SURVEYED:
DESIGNED:
S. TATU, PE
DRAWN:
ST
CHECKED:
DATE AP P R APPROVED:
SCALE:
SEE PLAN
ONE INCH
AT FULL SCALE
IF NOT ONE INCH
SCALE ACCORDINGLY
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991
DATU M
EROSION AND SEDIMENT CONTROL RECOMMENDED CONSTRUCTION SEQUENCE
(1) Pre -construction meeting.
(2) Post sign with name and phone number of ESC supervisor (may be consolidated with the required notice
of construction sign).
(3) Flag or fence clearing limits.
(4) Install catch basin protection if required.
(5) Grade and install construction entrance(s).
(6) Install perimeter protection (silt fence, brush barrier, etc.).
(7) Construct sediment ponds and traps.
(8) Grade and stabilize construction roads.
(9) Construct surface water controls (interceptor dikes, pipe slope drains, etc.) simultaneously with clearing
and grading for project development.
(10) Maintain erosion control measures in accordance with King County standards and manufacturer's
recommendations.
(11) Relocate erosion control measures or install new measures so that as site conditions change the erosion
and sediment control is always in accordance with the King County Erosion and Sediment Control
Standards.
(12) Cover all areas that will be unworked for more than seven days during the dry season or two days during
the wet season with straw, wood fiber mulch, compost, plastic sheeting or equivalent.
(13) Stabilize all areas that reach final grade within seven days.
(14) Seed or sod any areas to remain unworked for more than 30 days.
(15) Upon completion of the project, all disturbed areas must be stabilized and BMPs removed if appropriate.
CITY OF
RENTON
V'R
NX607
Planning/Building/Public Works Dept
Description:
PARCEL A:
THE NORTH 120 FEET OF THE SOUTH 392 FEET OF THE NORTH
SIX -TENTHS (6/10) OF THE WEST HALF OF THE WEST HALF OF THE
NORTHWEST QUARTER OF THE NORTHEAST QUARTER OF SECTION 32,
TOWNSHIP 23 NORTH, RANGE 5 EAST, WILLAMETTE MERIDIAN, IN
KING COUNTY, WASHINGTON;
EXCEPT THAT PORTION THEREOF LYING WITHIN 108TH AVENUE
SOUTHEAST AS ESTABLISHED UNDER RECORDING NOS.8105220768,
791766 AND 6601867.
PARCEL B:
THE WEST 160 FEET OF THE NORTH 12 FEET OF THE SOUTH 272 FEET
OF THE NORTH SIX -TENTHS (6/10) OF THE WEST HALF OF THE WEST
HALF OF THE NORTHWEST QUARTER OF THE NORTHEAST QUARTER OF
SECTION 32, TOWNSHP 23 NORTH, RANGE 5 EAST, WILLAMETTE
MERIDIAN, IN KING COUNTY, WASHINGTON;
EXCEPT THAT PORTION THEREOF LYING WITHIN 108TH AVENUE
SOUTHEAST AS ESTABLISHED UNDER RECORDING NOS.8105220768,
791766 AND 6601867.
PARCEL C:
THE NORTH 12 FEET OF THE SOUTH 272 FEET OF THE NORTH
SIX -TENTHS (6/10) OF THE WEST HALF OF THE WEST HALF OF THE
NORTHWEST QUARTER OF THE NORTHEAST QUARTER OF SECTION 32,
TOWNSHIP 23 NORTH, RANGE 5 EAST, WILLAMETTE MERIDIAN,
IN KING COUNTY, WASHINGTON;
EXCEPT THE WEST 160 FEET THEREOF
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R-394517 to
IN COMPLIANCE WITH CITY OF RENTON STANDARDS Q
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DATE:
ASIAN RESTAURANT ADDITION 0FIE5BOOK: 17
17630 108TH AVENUE SE, RENTON, WA 98055 PAGE: Z
R-394502 DRAWING NO:
DRAINAGE & TEMP. EROSION/SEDIMENTATION CONTROL C - 0 Q
SHEET: OF:
STANDARD NOTES
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