HomeMy WebLinkAboutBLD2010-00090GENERAL NOTES
1. All workmanship and materials shall conform to the MOST CURRENT Standard
Specifications for Road, Bridge and Municipal Construction prepared by WSDOT
and APWA as adopted by the JEFFERSON County Department of Public Works
(KCDPW).
2. Any revisions to the accepted construction plans shall be reviewed and
approved by the KCDPW prior to implementation in the field.
3. The contractor shall maintain a set of the accepted construction drawings
on -site at all times while construction is in progress.
4. It shall be the responsibility of the contractor to obtain all necessary permits
from the KCDPW prior to commencing any work within County right-of-way.
5. The contractor shall be responsible for providing adequate traffic control at all
times during construction alongside or within all public roadways. Traffic flow
on existing public roadways shall be maintained at oil times , unless permission
is obtained from the KCDPW for road closure and/or detours.
6. The locations of existing utilities on this plan is approximate only. The
contractor shall contact the "Underground Locate center at 1-800-424-5555,
and nonsubscribing individual utility companies 48 hours in advance of the
commencement of any construction activity. The contractor shall provide for
protection of existing utilities from damage caused by the contractor's
operations.
7. Rockeries or other retaining facilities exceeding 4 feet in height require a
separate permit from the JEFFERSON County Building Department.
8. A "Forestry Practices" permit may be required prior to clearing of the site.
Contact the JEFFERSON County Department of Community Development for further
information.
DRAINAGE NOTES
1. The contractor shall ensure that the drainage is installed and operational prior
to commencement of paving work.
2. All steel pipe and parts shall be galvanized. All submerged steel pipes and parts
shall be galvanized and have asphalt treatment #1 or better.
3. Drainage stubouts on individual lots shall be located with a five foot high 2" x
4" stake marked STORM". The stubout shall extend above surface level and
be secured to the stake.
GRADING NOTES
1. The contractor shall notify the engineer in the event or discovery of poor soils,
groundwater or discrepancies in the existing conditions as noted on the plans.
2. Maximum slope steepness shall be 2:1 Horizontal:Vertical for cut and fill slopes.
3. Unless otherwise specified, all embankments in the Plan Set shall be
constructed in accordance with Section 2-03.3(14)B of the WSDOT Standard
Specifications. Embankment compactions shall conform to Section
2-03.3(14)C, Method B of said Standard Specifications.
4. Embankments designed to impound water shall be compacted to 95% maximum
density per Section 2-03.3(14)C, Method C of WSDOT Standard Specifications.
5. All areas receiving fill material shall be prepared by removing vegetation,
noncomplying fill, topsoil and other unsuitable material, by scarifying the surface
to provide a bond with the new fill, and where slopes are steeper that 3
horizontal to i vertical and the height is greater than 5 feet, by benching into
sound competent material as determined by a soils engineer.
GENERAL EROSION AND SEDIMENTATION CONTROL NOTES
The following erosion and sedimentation control notes apply to all construction site
activities at all times, unless otherwise specified on these plans.
1. Approval of this erosion and sedimentation control plan does not constitute an
acceptance of the permanent road or drainage design.
2. The owner and his/her contractor shall be responsible at all times for preventing
silt-loden runoff from discharging from the project site. Failure by the owner
and/or contractor can result in a fine. The designated temporary contact person
noted on this plan must be available for contact by telephone on a 24 hour basis
throughout construction and until the project has been completed and accepted
by the county.
3. Implementation of these ESC plans and the construction, maintenance,
replacement and upgrading of these facilities is the responsibility of the owner
and/or contractor from the beginning of construction until all construction is
completed and accepted by the county and the site is stabilized.
4. Prior to beginning any work on the project site, a preconstruction conference
must be held, and shall be attended by the general contractor, the project
engineer, representatives from affected utilities, and a representative of JEFFERSON
County.
5. The erosion and sedimentation control facilities shown on this plan are to be
considered adequate basic requirements for the anticipated site conditions.
During construction, deviations from this plan may be necessary in order to
maintain water
e quality. Minor departures from this plan are permitted subject
to the approval of the county inspector. However, except for emergency
situations, all other deviations from this plan must be designed by the project
engineer and approved by JEFFERSON County prior to installation.
6. All erosion and sedimentation control measures shall be inspected by the owner
and/or contractor on a frequent basis and immediately after each rainfall, and
maintained as necessary to insure their continued functioning. All sediment
must be removed from silt fences, straw bales, sediment ponds, etc. prior to the
sediment reaching c it's maximum potential depth.
7. At no time shall concrete, concrete by-products, vehicle fluids, paint, chemicals
or other polluting matter be permitted to discharge to the temporary or
permanent drainage system, or to discharge from the project site.
B. Permanent detention/retention ponds, pipes, tanks or vaults may only be used
for sediment containment when specifically indicated on these plans.
MINIMUM EROSION AND SEDIMENTATION CONTROL REQUIREMENTS
1. Stabilization and sediment trapping - All exposed and unworked soils, including
soil stockpiles, shall be stabilized by suitable application of BMP's which protect
soil from the erosive forces of raindrop impact and flowing water. Applicable
practices include, but are not limited to vegetative establishment, mulching,
plastic covering, and the early application of gravel base on areas to be paved.
From October 1 to April 30. no soils shall remain unstabilized for more than 2
days. From May 1 to September 30, no soils shall remain unstabilized for more
than 7 days.
At all times of the year, the contractor shall have sufficient materials, equipment
and labor on -site to stabilize and prevent erosion from all denuded areas within
12 hours as site and weather conditions dictate.
From October 1 to April 30, the project engineer shall visit the development site
a minimum of once per week for the purpose of inspecting the erosion and
sedimentation control facilities, reviewing the progress of construction, and
verifying the effectiveness of the erosion control measures being undertaken.
The Project Engineer shall immediately inform the director of any problems or
potential problems observed during said site visits, as well and any
recommended changes in the erosion control measures to be undertaken. When
requested by the Director, the Project Engineer shall provide the Director with
written records of said weekly site visits and noted site observations.
In the event that ground on a project site is left bare after September 30th, the
County may issue a Stop Work Order for the entire project until satisfactory
controls are provided. In addition, the Owner will be subject to the penalties
provided in Section 10 and Section 11 of the JEFFERSON County Stormwater
Ordinance.
In the event that ground on a project site is left bare after September 30th and
the County in unsuccessful in contacting the owner or his/her designated
emergency contact person, the County may enter the project site and install
temporary ground cover measures and bill the owner for all expenses incurred
by the County. These costs will be in addition to any monetary penalties levied
against the owner.
2. Delineation of clearing and easement limits - Clearing limits, setbacks, buffers
and sensitive or critical areas such as steep slopes, wetlands and riparian
corridors shall be clearly marked in the field and inspected by JEFFERSON County
Department of Community Development prior to commencement of land
clearing activities.
3. Protection of adjacent property - Adjacent properties shall be protected from
sediment deposition by appropriate use of vegetative buffer strips, sediment
barriers or filters, dikes or mulching, or by a combination of these measures and
other appropriate BMP's.
4. Timing and stabilization of sediment trapping measures - Sediment ponds and
traps, perimeter dikes, sediment barriers and other BMP's intended to trap
sediment on -site shall be constructed as a first step in grading. These BMP's
shall be functional before land disturbing activities take place. Earthen
structures such as dams, dikes and diversions shall be stabilized according to
the timing indicated in item (1) above.
J. Jlope stabilization - Cut and fill slopes shall be constructed in a manner that will
minimize erosion. Roughened soil surfaces are preferred to smooth surfaces.
Interceptors should be constructed at the top of long, steep slopes which have
significant areas above that contribute runoff. Concentrated runoff should not
be allowed to flow down the face of a cut or fill slope unless contained within
on adequate channel or pipe slope drain. Wherever a slope face crosses a water
seepage plane, adequate drainage or other protection should be provided. In
addition, slopes should be stabilized in accordance with item (1) above.
6. Controlling off -site erosion - Properties and waterways downstream from
development sites shall be protected from erosion due to increases in the
volume, velocity, and peak flow rate of stormwater runoff from the
development site by the implementation of appropriate BMP's to minimize
adverse downstream impacts.
7. Stabilization of temporary conveyance channels and outlets - All temporary
on -site conve
yance channels shall be designed, constructed and stabilized to
prevent erosion from the expected flow velocity from ❑ 2 year frequency, 24
hour duration storm for the post -development condition. Stabilization adequate
to prevent erosion of outlets, adjacent stream banks, slopes and downstream
reaches shall be provided at the outlets of all conveyance systems.
8. Storm drain
inlet protection - p All storm drain inlets made operable during
shall not enter the
construction shall be protected so that stormwater runoff
conveyance system without first being filtered or otherwise treated to remove
sediment. After proper written application, the requirement for inlet protection
may be waived by the director on a site -specific basis when the conveyance
system downstream of the inlet discharges to an appropriate sediment
containment BMP and the conveyance system can be adequately cleaned
following site stabilization.
9. Underground utility construction - The construction of underground utility lines
shall be limited, where feasible, to no more than 500 feet of open trench at any
one time. Where consistent with safety and space considerations, excavated
material shall be placed on the uphill side of the trench. Dewatering devices
shall discharge to an appropriate sediment trap or pond, preceded by adequate
energy dissipation, prior to runoff leaving the site.
10. Constructed access routes - Wherever construction vehicle access routes
intersect paved roads, provisions must be made to minimize the transport of
sediment (mud) onto the paved road by use of appropriate BMP's such as a
stabilized Construction Entrance. If sediment is transported onto a road surface,
the roads shall be cleaned thoroughly, as a minimum, at the end of each day.
Sediment shall be removed from roads by shoveling or sweeping and being
transported to a controlled sediment disposal area. Street washing shall be
allowed only after sediment is removed in this manner.
11. Removal of temporary BMP's - All temporary erosion and sediment control
BMP's shall be removed within 30 days after final site stabilization is achieved
or after the temporary BMP's are no longer needed. Trapped sediment shall be
removed or stabilized on -site. Disturbed soil areas resulting from removal of
temporary BMP's shall be permanently stabilized. The removal of temporary
erosion and sediment control BMP's may not be required for those projects,
such as single family plats, that will be followed by additional construction
under a different permit. In these circumstances, the need for removing or
retaining the measures will be evaluated on a site -specific basis.
12. Dewatering construction sites - Dewatering devices shall discharge into an
appropriate sediment trap or pond, designed to accept such discharge, preceded
by adequate energy dissipation, prior to runoff leaving the site.
13. Control of pollutants other than sediment on construction sites - Al pollutants
other than sediment that occur on -site during construction shall be handled and
legally disposed of in a manner that does not cause contamination of storm or
surface waters. Pollutants of concern include, but are not limited to, fuels,
lubricants, solvents, concrete bi-products and construction materials.
14. Maintenance - All temporary and permanent erosion and sediment control BMP's
shall be maintained and repaired as needed to assure continued performance of
their intended function. All maintenance and repair shall be conducted in
accordance with the Manual. The Applicant shall be responsible for assuring
that any such facilities damaged during floods, storms or other adverse weather
conditions are immediately returned to normal operating condition.
15. Financial liability - A performance covenant or performance surety shall be
required for all projects to ensure compliance with the approved erosion and
sediment control plan as outlined in Section 4.0 of the JEFFERSON County
Stormwater Ordinance.
CONSTRUCTION SEQUENCE
1. Construct stabilized construction entrance(s).
2. Construct filter fence barriers.
3. Construct sedimentation basins.
4. Construct runoff interception and diversion ditches.
5. Clear and grade thn minimum site area required for construction of the various
phases of work.
6. Provide temporary 'iydroseeding or other source control stabilization measures
on all disturbed soils.
7. Maintain all ESC facilities to provide the required protection of downstream
water quality.
8. Provide permanent site stabilization.
9. ESC facilities shall not be removed until construction is complete and approved
by JEFFERSON County.
INSPECTION SCHEDULE
1. The Contractor shall notify JEFFERSON County Public Works De artment
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NO SCALE
D CONSTRUCTION ENTRANCE
Filter Fabric (MIRAFI 140N or Equal,
36" Wide Rolls). Use Staples or
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to Wire
Wire Mesh Support Fence
for Silt Film Fabrics
6" 71
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8"02- Trench
2"X2" Douglas Fir 6' O.C. No 1 Grade
or qua . erns e s ee lance posts
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ILTER MESH Frovide washed gravel backfill
or compacted native soil as
ACKFILL directed by local government
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No SCALE A.D.A. ENGINEERING
FILTER FENCE A D A P.D. BOX 847
POULSSO, WA 98370
DETAIL PHONE (36
B.I. PHONE: (20(206)) 842 842-6123
FAX: (360) 779-7031
Construction Division to arrange for inspection of the various phases of work
checked below. All inspections shall be completed prior to proceeding with the
• , .
next phase of work.
A. Installation of the stabilized construction entrance.
B. Implementation of the various phases of the Erosion and
Mechanical Joining
C. Prior to placement of the detention outlet control structure.
D. Placement of drainage structures prior to backfilling, including
Mechanical joining to other piping materials -fittings,
Sedimentation Control Plan.
valves, tanks, pumps, etc. - may be accomplished
E. Inspection of prepared sub -grade.
with Driscopipe flange adapters and metal back-up
F. Inspection of gravel base placement.
flanges. Flanges are also used to connect lengths of
G. nspection of fine -grading prior to paving.
Driscopipe togethewvhen-Meat fusion is impractical.
H. inspection of paving operations.
Flange Adapters are pressure rated the same as the
2.
The Contractor shall be responsible for all work performed and shall ensure that
pipe. Flange adapters can be heat fused to the pipe as
construction is acceptable to JEFFERSON County.
outlined in the heat fusion section.
3.
If inspection is not called for prior to completion of any item of work so
Figure 1 illustrates the flanged method for joining
designated, special destructive and/or no -destructive testing procedures may
polyethylene pipe to itself or to steel pipe. Although
be required to ensure the acceptability of the work. If such procedures are
ductile iron is now used for the Slip-on flanges, other
required, the Contractor shall be responsible for all costs associated with the
materials are available from your local supplier.
testing and/or restoration of the work.
Gaskets may be used between the polyethylene flange
adapters but it is not generally necessary. Sufficient
MAINTENANCE
torque should be applied evenly to the bolts to prevent
eaks. After initial installation and tightening of flanged
1.
Erosion control facilities shall be inspected after each storm event and daily
connections, it is a good practice to allow the
2.
during prolonged rainfall.
Necessary repairs or replacement of facilities shall be accomplished promptly.
connections to set for a period of time (usually a few
3.
Sediment deposits shall be removed after each storm event or when the level
hours). Then conduct a final tightening of the bolts.
of deposition reaches approximately one-half the maximum potential depth.
Mechanical joining of 2"- 8" pipe may also be
4.
Sediment deposit remaining in place after the ESC facilities are no longer
accomplished using the low cost, quick assembly,
required shall be dressed to conform to the existing grade, prepared and
smaller O.D. profile Driscopipe threaded union. The
5.
seeded.
Temporary Erosion and Sedimentation Control facilities shall be maintained by:
union can be joined in about a minute or less. Contact
your Driscopipe distributor for product information.
Emergency Phone Number: 206 842 2426
The Owner's representative shall be: KENTON LARSON
Emergency Phone Number:
CB #1 BLOCKING DETAIL
NOT TO SCALE
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Butt Fusing a Molded Flange Adapter to Pipe.
Figure 1.
Driscopipe Flange
Steel Pipe Adapter
with Flange f`. Bolts
u1� Section of 0
- = Driscopipe
Butt Fuse 0
Flange
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to Pipe TO
Slip on Metal Flange
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2 - Slip On
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SLOT
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6.5"
STEEL COUPLING BAN
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OES NOTE: THE PIPE ANCHORS SHALL BE
SECURELY FASTENED BEFORE BACKFILDNG
3/4" DIA. TYPICAL PIPE
0 ANCHOR ASSEMBLY
ANCHOR PLATE NOT TO SCALE
NOT TO SCALE
ANCHOR PLATE
DETAIL
NOT TO SCALE
FLANGE (SEE MECHANICAL JOINING DETAIL, THIS P
ORIFICE DIAMETER = 1.0'
INCLUDE 7 01
A
40 FT.
GRADE BOARD
FLOW TO SECOND
PIPE O.D.
P LAN
NO SCALE
DISPERSAL TRENCH
IF NECESSARY (TYP.) !
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> 4"
1 1/2" DIA. SCH 40
GALVANIZED STEEL PIPE
1/4" STEEL PLATE
GALVANIZED AFTER
FABRICATION
(SEE DETAIL BELOW)
A.DA. A.D.A. ENGINEERING
P.O. BOX 847
POULSBO, WA 98370
PHONE: (360) 779-6633
B.I. PHONE: (206) 842-6123
FAX: (360) 779-7031
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LEVEL SPREADER DETAIL
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END CAP OR PLUG
TYPE 1 C.B. WITH
SOLD COVER (LOCKING)
A _
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FLAT/LEVEL
CLEAN OUT WYE
FROM PIPE (T1P.)
DIAMETER = 6"
6'
TO
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CONCRETE
ANCHOR
BLOCKING
I- --VARIES
6" COMPACTED DEPTH
GRAVEL BASE - CLASS 'a'
2' COMPA
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CRUSHED SURFACING TOP COURSE
ACCESS DRIVE
TYPICAL CROSS SECTION
NOT To SCALE
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PIPE O.D.
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TREATED iGRADE BOARD
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WASHED ROCK (<5% FINES)
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SECTION A -A
NO SCALE
NOTES:
1. THIS TRENCH SHALL BE CONSTRUCTED SO AS TO
PREVENT POINT DISCHARGE AND/OR EROSION
2. TRENCHES MAY BE PLACED NO CLOSER THAN 50 FEET
TO ONE ANOTHER
3. TRENCH AND GRADE BOARD MUST BE LEVEL; ALIGN TO
FOLLOW CONTOURS OF SITE
4. GRADE BOARD SUPPORT
POST SPACING AS REQ'D BY
SOIL CONDITIONS
5. WRAP TRENCH WI
TH FILTER
FABRIC (EXCEPT TOP)
!I! TYPE I C-B. WITH DISPERSAL TRENCH
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® A.D.A. ENGINEERING
P.O. BOX 847
POULSBO, WA 98370
PHONE: (360) 779-6633
B.I. PHONE (206) 842-6123
FAX: (360) 779-7031
%�LICIY I IIVrUNIVIA I IVIV: RCIV I UN iSt HUSA LAKbON
ADDRESS: 455 WINSLOW WAY WEST TAX/PARCEL #: 0212020004
ADDRESS: BAINBRIDGE ISLAND WA 98110 TELEPHONE: 206 842 2426
DRAINAGE PLAN
PLAN AND DETAILS
M L LW SECT.20, TOWNSHIP 30N., RANGE 1 E., W.M., JEFFERSON COUNTY, WA
ado IIc®emborgmail.com P.O. BOX 847
A.D.A. POULSBO, WA 98370
PHONE: (360) 779-6633
B.I. 42-6123
FAX: (3600 )77897031
A.D.A. ENGINEERING, LLC
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DRAWN: JJH CHECKED: HAA SCALE 1 "=20' JOB N0.:10-E6443
REPLACED ACCESS DRIVE DITCH WITH LEVEL SPREADER JUNE 17. 2010 DESIGN: JJH I DATE: MARCH 20101 SHEET 2 OF 2 FILE NO.: 117.71