HomeMy WebLinkAboutTED4001812.317f5CP NOTES
1. Before any construction or development activity occurs, a
preconstruction meeting must be held with the City of Renton
Department of Public Works, Design Engineer.
2. All limits of clearing and areas of vegetation preservation as
prescribed on the plan shall be clearly flagged in the field
and observed during construction.
3. All required sedimentation/erosion control facilities must be
constructed and in operation prior to land clearing and/or'
other construction to insure that sediment laden water does
not enter the natural drainage system. All erosion and
sediment facilities shall be maintained in a satisfactory
condition until such time that clearing and/or construction is
completed and potential for on -site erosion has passed. The
implementation, maintenance, replacement and additions to
erosion/sedimentation control systems shall be the
responsibility of the permittee.
4. 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 permittee shall
anticipate that more erosion and sedimentation control
facilities will be necessary to insure complete siltation
control on the proposed site. During the course of
construction, it shall be the obligation and responsibility of
the permittee to address any new conditions that may be
created by his 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 an approval of storm drainage
design, size nor location of pipes, restrictors, channels, or
retention facilities.
6. During the time period of November 1 through March 31, all
project disturbed soil areas greater than 5,000 square feet,
that are to be left unworked for more than twelve (12 ) hours,
shall be 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 of 30 days or more,
all disturbed areas must be immediately stabilized with
mulching, grass planting or other approved erosion control
treatment applicable to the time of year in question. 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 permittee, 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, a minimum of 3 feet
high is required, with 3:1 side slopes.
9. A temporary gravel construction entrance, 24' x 50' x 8" of 4-
to 6- inch quarry spalls shall be located at all points of
vehicular ingress and egress to the construction site.
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SrOAM D11.41N.46f NOTES
1. Before any construction or -development activity occurs, a pre -
construction meeting must be field with the City of Renton
Department of Public Works, Design Engineer.
2. All construction shall be in accordance with the 111988
Standard Specifications for Road, Bridge and Municipal
Construction" prepared by W.S.D.0.T., and the American Public
Works Association (APWA), as amended by the City of Renton
Department of Public Works.
3. The storm drainage system shall be constructed according to
the approved plans which are on file in the Department of
Public Works. Any deviation from the approved plans will
require written approval from the City of Renton Department of
Public Works, Design Engineer or Storm Water Utility.
4. A copy of these approved plans must be on the job site
whenever construction is in progress.
5. Datum shall be U.S.G.S. unless otherwise approved by City of
Renton Department of Public Works. Reference benchmark and
elevation are noted oil the plans.
6. 4%11 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 Department of Public
Works, Storm Water Utility.
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 Department of Public Works, Storm Water Utility.
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", with the
exception of PVC pipe. All trench backfill shall be compacted
to minimum 95% for pavement and structural fill and 90%
otherwise per AS`I'M D-1557-70. Pea gravel bedding shall be 6"
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 tiie 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 Department of Public Works, Design Engineer.
14. Rock for erosion protection of roadside ditches, where
required, shall be of sound quarry rock placed to a depth of
1 foot and must meet the following specifications: 411-811/40%-
70% passing; 2"-4" rock/30%-40% passing; and -2" rock/10%-20%
passing.
15. All building downspouts and footing drains shall be connected
to the storm drainage system, unless approved by the
Department of Public Works, Design Engineer or Storm Water
Utility. An accurately dimensioned certified as -built drawing
of this drainage system will be submitted to the City of
Renton upon completion.
16. Issuance of the Building or Construction Permit 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 lift, 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 an approved traffic control
plan by the Traffic Engineering Division of the Department of
Public Works. A1.1 sections of the W.S.D.O.T. Standard
Spec ifi.cations 1-07-23, Traffic Control, shall apply.
18. Special drainage measures will be required if the project
location is within the aquifer protection area.
MCOWMIEN
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By
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EXPMS 5/6/ 1997
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11--22--93
ISSUE DATE
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SHEET REVISION
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CIVIL ENOINEERING AND
PLANNING CONSULTANTS
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