HomeMy WebLinkAboutBosAir Pre-Con Notes.pdfDEPARTMENT OF COMMUNITY
AND ECONOMIC DEVELOPMENT
Last Modified 12/7/2018 1 BosAir Addition 4/13/2021
CITY OF RENTON
PRECONSTRUCTION MEETING
BosAir Addition, 4/13/2021
PROJECT PERSONNEL:
Jonathan Chavez, City Project Manager, 425-430-7288, jchavez@Rentonwa.gov
Brad Stocco, Public Works Inspector, 425-282-2373, BStocco@Rentonwa.gov
Alex Morganroth, Planning Reviewer, 425-430-7219, AMorganroth@Rentonwa.gov
Corey Thomas, Fire Inspector, 425-430-7024, CThomas@RentonRFA.org
GENERAL:
1. Call the construction inspection line at 425-430-7203 24 hours before you start work. Notify
Fire Dispatch, Renton Police Department, and King County Metro of project construction
schedule.
Fire Dispatch can be reached at 253-852-2121. The Renton Police Department can be reached
at 425-430-7500. King County Metro can be reached at 206-477-1140.
2. CONSTRUCTION HOURS OUTSIDE OF RIGHT OF WAY: 7:00 AM to 8:00 PM Monday thru Friday
and 9:00 AM to 8:00 PM on Saturday. Saturday work is by permission only. No work is allowed
on Sunday.
3. CONSTRUCTION HOURS INSIDE OF RIGHT OF WAY: Follow approved traffic control plan.
Saturday work is by permission only. No work is allowed on Sunday.
4. RIGHT OF WAY HAUL HOURS: 8:30 AM to 3:30 PM Monday thru Friday. Hauling on Saturday is
by permission only. No hauling is allowed on Sunday.
5. INSPECTION HOURS: 7:00 AM to 3:30 PM Monday thru Friday. Contractor must call for City
inspection before 3:00 PM on the previous day. Inspections outside of inspection hours must
be requested.
6. To request work, hauling, and inspections outside of the hours listed above, contact the City no
later than three working days prior to the requested activity.
7. After hours inspection fees (applies to inspections performed on Saturdays, Sundays, observed
City of Renton holidays, and non-holiday Monday-Fridays outside the hours of 7:00am to 3:30pm).
Current fees can be found on the City of Renton Fee Schedule. Any outstanding fees are to be paid
by the specialized billing contact provided by the applicant.
8. Public Works Reimbursement (any work performed by City forces or under City contract on behalf
of a permit applicant to repair damage to the City infrastructure caused by the permit applicant
or contractor under its control, or any and all roadway or right-of-way cleanup efforts performed
by City forces or under City contract that resulted from the work performed by the permit
applicant or contractors under its control. Current fees can be found on the City of Renton Fee
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Schedule. Any outstanding fees are to be paid by the specialized billing contact provided by the
applicant.
9. Contractors shall use only sets of drawings approved by the City for constructing utility and
transportation improvements. Approved drawings are signed by the Project Manager and / or
other city staff on each plan sheet. A set of approved drawings shall be kept on-site at all times.
10. RECORD DRAWINGS: It is the responsibility of the contractor and engineer to keep record
drawings. All changes to the approved construction plans shall be shown on the record drawings.
Record drawings are required to be submitted to the City. Record drawings submitted to the City
shall be prepared, stamped, and signed by a Professional Land Surveyor or Professional Engineer
licensed in the State of Washington.
All plan sheets with utility and transportation improvements including those constructed per
design, must be verified, stamped, and signed “As-Built”. Record drawings shall first be submitted
to the City for review by the Public Works Inspector. Once the record drawings are approved by
the Public Works Inspector, final electronic plans (PDF) shall be submitted for City permanent
records.
The Engineer of Record will be required to provide a signed Washington State Department of
Health Construction Completion Report Form along with the Record Drawings for all water mains
to be construction as part of the project. The form can be obtained at the following address:
http://www.doh.wa.gov/Portals/1/Documents/Pubs/331-146-F.pdf.
11. If the materials shown on the approved plans differ from those shown in the City standard details,
material submittals shall be made to the Project Manager for approval prior to installation.
12. MINOR FIELD CHANGES: Identify the proposed change(s) to the Public Works Inspector. If the
Public Works Inspector determines that the change(s) is minor, the Public Works Inspector can
approve the change(s) in the field. A summary of any minor changes approved by the Public
Works Inspector shall be emailed to the Project Manager. If the Public Works Inspector
determines that the change(s) needs further review and approval from other City staff, the
contractor shall follow the directions in the Major Field Changes section below.
13. MAJOR FIELD CHANGES: Submit a digital plan clearly showing the proposed change(s) and
justification via email to the Project Manager and Public Works Inspector. City staff will respond
to the requested change within two business days. The Public Works Inspector cannot give
approval for major construction changes in the field.
14. Trenches with City utilities shall be left open for inspection prior to backfill.
15. A spill kit shall be located on site and easily identifiable with signage.
16. PROJECT CLOSEOUT: The Civil Construction Permit Final Inspection and Construction Closeout
Process Requirements document gives information of the requirements for construction closeout.
The current version of the Final Inspection and Construction Closeout Process and Requirements
document is included in this preconstruction meeting packet. All requirements of the codes and
regulations for the construction permit closeout should be followed by the contractor and
developer.
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17. FINAL INSPECTION WALKTHROUGH: Contractor shall accompany the Site Inspector during the
final walkthrough and provide any required traffic control.
TRANSPORTATION:
1. TRAFFIC CONTROL PLAN: An approved traffic control plan in accordance with the Manual on
Uniform Traffic Control Devices (MUTCD) is required prior to any construction activity in the
right of way.
A traffic control plan should be submitted to the Project Manager for review at least five working
days prior to proposed work in the right of way. The traffic control plan shall be submitted with
the traffic control plan cover sheet found here:
https://rentonwa.gov/city_hall/public_works/transportation_systems/operations/traffic/traffic
_control_plans
The traffic control plan shall address both roadway / vehicular and sidewalk / pedestrian traffic
impacts.
All traffic control plans will be required to submit no later than five (5) working days before the
date of work.
2. STREET RESTORATION: Street restoration is required to conform to the City of Renton Trench
Restoration and Street Overlay Requirements. A copy has been provided. All street repairs shall
be complete and in place within 14 days, or as directed by the Public Works Inspector.
3. PAVING: Paving shall be done in accordance with WSDOT Standard Specifications Division 5.
Weather limitations from this specification shall be followed. Reference Section 5-04.3(16) for
HMA weather limitations. Pavement subgrade and rock surfaces shall be compacted to at least
95% of the maximum density.
4. TRENCHES: Trenches shall not be left overnight without approval of the Public Works Inspector.
Trenches shall be backfilled, plated, or fenced. The proposed method of cover or protection shall
be submitted to the Public Works Inspector for approval. Shoring plates and cold mix shall be
available on site at all times. The Public Works Inspector will require cold mix for trench
restoration in sidewalks or driveways.
5. City streets shall be kept clean at all times. Streets shall be swept in a timely manner. Truck
washing and / or other measures as approved by the Public Works Inspector may be required for
the duration of the project.
6. Construction traffic shall observe all traffic laws. All hauling shall consist of legal loads.
7. The right of way shall remain unobstructed when possible. No stockpiles are allowed in the right
of way. All truck maneuvering and materials storage shall occur on-site.
8. NOISE VARIANCE: Projects that include construction between 10 pm and 7 am will require a noise
variance if the project is located within 300 feet of a residential zone.
• For work not exceeding 2 days, an Administrative noise variance is required. The process
will take approximately five to six weeks for the review, public notification, decision, and end of
appeal period prior to start of work.
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• For work exceeding 2 days, a Public Hearing will be required. The process will take
approximately twelve weeks for the review, public notification, Public Hearing, Hearing Examiner
decision, and end of appeal period prior to start of work.
Please consider the noise variance time requirements when you plan and schedule the
construction work.
CITY UTILITIES
WATER:
1. Follow requirements outlined in the ACE Aviation Waterline Approval Letter from Boeing
(attached).
2. Pipe materials, valves, and fittings shall be as indicated on the approved plans and standard notes.
3. When installing water main in new roadways, the proposed road prism shall be constructed to
subgrade prior to any utility installation.
4. Temporary and permanent thrust blocks shall be formed. Concrete for thrust blocks shall be
delivered to the job. No on-site mixes are allowed. Standard mix design shall be 3,000 psi. All
blocking shall be inspected before backfilling.
5. Procedure for cleaning and construction testing of new water lines:
a. Pipe cleaning shall be by poly pigging through vertical crosses installed at the ends of the
water lines to serve as pig launches and sediment traps.
b. Water main shall be polywrapped.
c. All water lines shall be pressure tested to minimum of 200 psi or 150 psi over operating
pressure (static) for 2 hours. Services may be tested separately by visual inspection of the
corp stop under static pressure.
d. Chlorinate for 24 hours, using liquid chlorine and chlorine pump assembly. The Public
Works shall schedule chlorination. Seven working days advance notice is required.
e. Water used for flushing water lines shall be drained into the sanitary sewer only.
f. The construction inspector will collect purity tests at blow-offs. Water purity tests are
taken to the testing laboratory by the Public Works Inspector. Test results are available
in 5-7 days.
6. 5/8” minus crushed rock backfill to grade is required in City right-of-way. Recycled 1-1/4”
concrete may be used in lieu of crushed rock backfill. Pit run type material may be considered for
use in backfill if approved by the Public Works Inspector. Backfill shall be compacted to at least
95% of maximum density. Compaction testing is required.
7. Where conflict exists, the water main shall go under other utilities; however, it is preferred that
no water mains shall have more than six feet of cover. Water mains with a diameter of 10-inches
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and under shall have a minimum of three feet of cover. Water mains 12-inches and larger shall
have a minimum of four feet of cover.
8. All bends on water mains shall be surveyed prior to backfill with horizontal and vertical control
for all bends established.
SANITARY SEWER:
1. Follow King County Wastewater Treatment Division Notes:
• The LPA Program must be contacted at 206-477-5414 or LPA.team@kingcounty.gov at least
five (5) working days in advance of the pre-construction conference for this project.
• The LPA Program must be contacted at 206-477-5414 or LPA.team@kingcounty.gov at least
three (3) working days prior to construction activity within 50 feet of the King County sewer
pipe.
• King County must be provided with the contractor’s contact information prior to the start of
construction.
• The proposed connection to the 24” Boeing Renton Trunk shall be made by core drilling and
use of an Inserta-Tee connection sized and installed per manufacturer instructions.
• A King County representative shall be on site at all times during excavation, coring, and
installation of the connection to the Boeing Renton Trunk.
• King County does not guarantee pipe location, diameter, or invert elevation; therefore, field
verification is recommended prior to construction.
• No debris shall be allowed to enter the King County sewer system during the construction of
or the connection to the Boeing Renton Trunk.
• All work on King County pipelines and facilities shall not be backfilled until it has been
inspected and approved by a King County representative.
• The proposed connection to the Boeing Renton Trunk shall be plugged and not put into
service until the tributary system has been cleaned, inspected, tested, and approved by the
City of Renton.
• Upon completion of the work, the City of Renton shall provide King County with an “as-
constructed” drawing of the new connection to the Boeing Renton Trunk.
2. Pipe and materials shall be as indicated on the approved plans and standard notes. Any sewer
pipe with less than four feet or greater than fifteen feet of cover shall be Ductile Iron, Class 50, or
C900 pipe.
3. When installing sewer main in new roadways, the proposed road prism shall be constructed to
subgrade prior to any utility installation.
4. All manholes shall have all interior surfaces, including channeling, coated/sealed with a high solids
urethane coating: Wasser MC-Conseal or approved equal. Coating shall be white.
5. Pipe bedding shall be pea gravel or 5/8" minus crushed rock as approved by the Public Works
Inspector. Bedding shall extend 1-foot above the pipe and 6-inches below the pipe. Backfill shall
be compacted to at least 95% of maximum density. Compaction testing is required.
6. A Number 6 wire shall be wrapped around the stub and extended to the top with a 2” x 4” marker
stenciled in white.
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7. Contractor shall as-built the invert elevation of all side sewer stubs. If cleanouts are installed, the
top and flowline shall be as-built and noted on the record drawings.
8. No shims or wedges shall be used on any utility structure.
9. Contractor will be responsible for TVing of the sewer main. TVing shall occur after channeling and
coating is complete. Pressure tests on the main and side sewers shall be per City specifications.
10. Sewer mains may be surveyed after backfill using the manholes as access points.
STORM/EROSION CONTROL:
1. Approved temporary erosion and sediment control (TESC) and stormwater pollution prevention
and spill control (SWPPS) measures are to be installed as first order of business and maintained
at all times per the approved drawings or at the direction of the Construction Stormwater
Supervisor, or the project Certified Erosion and Sediment Control Lead (CESCL), and the Public
Works Inspector.
2. The approved Construction Storm Pollution Prevention Plan (CSWPPP) shall be located on site at
all times.
3. The Construction Stormwater Supervisor shall review the site’s TESC and SWPPS measures at least
weekly and within 24 hours of significant storms.
4. If dewatering for the site is required, all site construction stormwater discharge shall be less than
25 NTUs if discharged into Waters of the State. Any pipe conveyance system that eventually
discharges to a body of water is construed as discharging into Water of the State.
5. If dewatering is proposed to the City sewer then a permit from the City and King County will be
required. If dewatering is proposed to a sewer system belonging to another sewer district,
contact that district for approval. Contractor is strongly encouraged to obtain all required sewer
discharge permits in advance of any anticipated need to discharge to a sewer.
6. Wet Season requirements found in Appendix D of the 2017 City of Renton Surface Water Design
Manual (RSWDM) shall be adhered to for construction occurring between October 1st and April
30th.
7. Dust control shall be implemented as directed by the Public Works Inspector.
8. Proper removal of all TESC measures is required prior to permit closeout unless otherwise
approved by the Public Works Inspector or Project Manager.
9. Pipe and materials shall be as indicated on the approved plans and standard notes.
FIRE PREVENTION:
1. Access to the site shall be maintained at all times. Access must be able to support emergency
equipment in all types of weather.
2. A separate permit from the Renton Fire Authority is required for the following items. These
permits can be applied for at the 6th Floor of City Hall.
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a. Underground water mains serving fire sprinkler systems. All fire sprinkler systems shall
be installed by a Fire Sprinkler Contractor licensed in the State of Washington.
b. Temporary storage, handling, or use of hazardous materials, as required by International
Fire Code and City of Renton Ordinance.
c. Temporary storage of fuel on site.
d. Abandonment, removal, or installation of fuel storage tanks.
e. Hot works on site (welding, soldering, cutting, brazing, etc.).
PLANNING:
1. If applicable, no work shall occur within critical areas and /or buffers unless modified according
to RMC 4-3-050 (buffer reduction, averaging, critical area variance and / or exemption).
Mitigation plantings shall occur in accordance with the approved Final Mitigation plan.
2. The contractor / applicant shall comply with all conditions of land use approval and SEPA
Environmental Review.
CONDITIONS TO ISSUANCE OF A CONSTRUCTION PERMIT:
1. Pay all system development, special assessment, and other outstanding permit fees.
2. Provide a surety device in the amount calculated by the City’s Bond Quantity Worksheet. The
surety device can be a permit bond, assignment of funds, or irrevocable letter of credit. The Bond
Quantity Worksheet and form for each time of surety device can be found in the Development
Engineering Forms section of the City website located here:
http://rentonwa.gov/business/default.aspx?id=42473.
3. Provide a copy of the utility / dirt contractor’s license number.
4. Provide a copy of the utility / dirt contractor’s City of Renton business license number.
February 23, 2021
Subject: Boeing Co. Approval of relocation of waterline utilities
To: Ace Aviation
If the following conditions are met The Boeing Company (“Boeing”) will approve your request to
relocate the 12” water line, located on City-owned land, that feeds our Apron D leased area, ( See
Exhibit – attached Site Plan ). Boeing’s approval would be conditioned on the following
Ace Aviation will provide for Boeing’s review and approval plans for the relocation project,
including redlines, materials specified, testing specifications and calculations.
The proposed work must meet all applicable City utility requirements and the current edition of
the NFPA guidelines for buried fire mains.
Contractor shall pothole and verify pipe location, de pth, material, and condition prior to
beginning work. The preliminary plans that Boeing has seen show existing pipe as ductile iron.
However, record drawings indicate that the existing pipe is welded steel. The contractor will
verify existing material prior to ordering new material.
Prior to beginning work, the contractor shall determine fittings required for connection to
existing pipe and provide a materials submittal for Boeing’s approval. Work will not begin until
Boeing provides its approval (which will not be unreasonably withheld, conditioned, or delayed
Ace Aviation will present a shutdown request to the Boeing Renton shutdown committee at
least 2 weeks prior to the planned shutdown, including expected downtime duration and a
contingency plan provided in the event of system damage or delayed utility shutdown beyond 7
calendar days. The shutdown committee meets on Tuesday and Thursday mornings at 8:00
am. Call-in details will be provided. The work will not begin until the shutdown committee h as
given its approval.
We request that the contractor use proper flushing of piping to ensure that foreign materials are
removed. It is imperative that the pipe be protected from any debris during installation as
serious damage to the system may occur without proper precautions.
Boeing will have the opportunity to inspect and examine piping before it is connected to the
system and again before the new pipe is covered. If Boeing has an objection or a concern at
either such point in the process, the parties will meet to resolve such objection or concern.
Boeing will have the right to witness pressure testing of the system.
All the work in question will be performed at no cost to Boeing.
Boeing’s review, examination, and/or approval of any element of thi s project will not constitute
a guarantee or warranty of any kind. The design, workmanship, and materials used in this
project are and remain the responsibility of Ace Aviation, City of Renton, and the contractors
they have hired to design and perform thi s work and to provide the materials required
Please feel free to contact the undersigned with any questions.
Sincerely,
Robert Henderson Robert Henderson
Infrastructure Maintenance Supervisor
Facilities & Asset Management - Renton
Cell # 425-213-4521
Cc Alex Morganroth, AICP - Senior Planner
City of Renton
Cc WILLIAM ADAMS, P.E. | Civil Engineer III
Renton Municipal Airport (RNT) | Clayton Scott Field
Cc Jonathan Chavez, P.E.
Civil Engineer III Dev. Eng. City of Renton
DEPARTMENT OF COMMUNITY
AND ECONOMIC DEVELOPMENT
Page 1 of 10 | Published: 2/16/2018
Planning Division | 1055 South Grady Way, 6th Floor | Renton, WA 98057 | 425-430-7200
Website: rentonwa.gov
TRENCH RESTORATION AND STREET OVERLAY
REQUIREMENTS
Published : 2/16/2018
It is the intent of the following policies, procedures and specifications to obtain satisfactory work with a
minimum of delay to all parties concerned when performing trench restorations or street overlays.
PURPOSE
The purpose of this Code Section is to establish guidelines for the restoration of City streets disturbed by installation of
utilities and other construction activities. Any public or private utilities, general contractors, or others permitted to work
in the public right-of-way will adhere to the procedures set forth in this policy.
DEFINITION
Engineer: The term “engineer” shall denote the City project manager, inspector and/or plan reviewer, or their designated
representative.
APPLICATION
The following standards in this Section shall be followed when doing trench or excavation work within the paved portion
of any City of Renton right-of-way. Modifications or exemptions to these standards may be authorized by the Community
and Economic Development Administrator, or authorized representative, upon written request by the permittee, the
permittee’s contractor or engineer, and demonstration of an equivalent alternative.
HOURS OF OPERATIONS
Hours for work within the roadway for asphalt overlays or trench restoration shall be as directed by the Traffic Control
Plan requirements and the Traffic Operations Engineer.
INSPECTION
The Engineer may determine in the field that a full street-width (edge-of-pavement to edge-of-pavement) overlay is
required due to changes in the permit conditions such as, but not limited to the following:
1. There has been damage to the existing asphalt surface due to the contractor’s equipment.
2. The trench width was increased significantly or the existing pavement is undermined or damaged.
3. Any other construction related activities that require additional pavement restoration.
TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS (CONT ’D )
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CITY OF RENTON STANDARDS
All materials and workmanship shall be in accordance with the City of Renton Standard and Supplemental Specifications
(current adopted version) except where otherwise noted in these standards. Materials and workmanship are required to
be in conformance with standards for the Standard Specifications for Road, Bridge, and Municipal Construction prepared
by the Washington State Chapter of the American Public Works Association (APWA) and the Washington State Department
of Transportation (WSDOT) and shall comply with the current edition, as modified by the City of Renton Supplemental
Specifications.
1. An asphalt paver shall be used in accordance with Section 5-04.3(3) of Standard Specifications. A “Layton Box”
or equal may be used in place of the power-propelled paver. Rollers shall be used in accordance with Section 5-
04.3(4) of the Standard Specifications. “Plate Compactors” and “Jumping Jacks” shall not be used in lieu of
rollers.
2. Trench backfill and resurfacing shall be as shown in the City of Renton Standard Details, unless modified by the
City permit. Surfacing depths shown in the standard details are minimums and may be increased by the Engineer
to meet traffic loads or site conditions.
3. Requirement for Patching, Overlay, and Overlay Widths:
All trench and pavement cuts shall be made by sawcut or by grinding. Sawcuts or grinding shall be a minimum
of one foot (1') outside the trench width. The top two inches (2") of asphalt shall be ground down to a minimum
distance of one foot (1') beyond the actual outside edges of the trench and shall be replaced with two inches
(2") of Class B asphalt, per City of Renton Standard Plans. At the discretion of the engineer, a full street width
overlay may be required.
Lane-width or a full street-width overlay will be determined based upon the location and length of the proposed
trench within the roadway cross-section. Changes in field conditions may warrant implementation of additional
overlay requirements.
a. Trenches (Road Crossings):
(1) The minimum width of a transverse patch (road crossing) shall be six and one-half feet (6.5'). See City
of Renton Standard Plans.
(2) Any affected lane will be ground down two inches (2") and paved for the entire width of the lane.
(3) The patch shall be a minimum of one foot (1') beyond the excavation and patch length shall be a
minimum of an entire traveled lane.
(4) If the outside of the trenching is within three feet (3') of any adjacent lane line, the entire adjacent
traveled lane affected will be repaved.
(5) An area including the trench and one foot (1') on each side of the trench but not less than six and one-
half feet (6.5') total for the entire width of the affected traveled lanes will be ground down to a depth
of two inches (2"). A two-inch (2") overlay of Class B asphalt will be applied per City standards.
b. Trenches Running Parallel with the Street:
(1) The minimum width of a longitudinal patch shall be four and one-half feet (4.5'). See City of Renton
Standard Plans.
(2) If the trenching is within a single traveled lane, an entire lane-width overlay will be required.
TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS (CONT ’D )
Page 3 of 10 | Published: 2/16/2018
(3) If the outside of the trenching is within three feet (3') of any adjacent lane line, the entire adjacent
traveled land affected will be overlaid.
(4) If the trenching is greater than or equal to 30% of lane per block (660 foot maximum block length), or
if the total patches exceed 12 per block, then the lanes affected will be overlaid. Minimum overlay
shall include all patches within the block section.
(5) The entire traveled lane width for the length of the trench and an additional ten feet (10′) at each end
of the trench will be ground down to a depth of two inches (2′′). A two-inch (2′′) overlay of Class B will
be applied per City standards.
c. Potholing:
Potholing shall meet the same requirements as trenching and pavement restoration. Potholi ng shall be a
minimum of one foot (1') beyond the excavation. All affected lanes will be ground down to a depth of two
inches (2") and paved not less than six and one half feet (6.5') wide for the entire width of the lane. Potholes
greater than five feet (5') in length, width or diameter shall be restored to trench restoration standards. In
all cases potholes shall be repaired per Renton Standard Plans. Restoration requirements utilizing vactor
equipment will be determined by the Engineer.
4. Pavement Removal in Lieu of Grinding:
The contractor in all cases can remove the pavement in the replacement area instead of grinding out the
specified two inches (2") of asphalt. Full pavement replacement to meet or exceed the existing pavement depth
will be required for the area of pavement removal. Patching of pervious concrete shall follow American Concrete
Institute (ACI) 522.1-13. Porous asphalt shall be specified on a project-by-project basis by the engineer.
Permeable materials should be replaced in-kind where feasible. Patching porous asphalt with conventional
asphalt is acceptable if it is no more than ten percent (10%) of the total facility area or does not impact the
overall facility function. Appropriate precautions shall be taken during pavement repair and replacement efforts
to prevent clogging of adjacent surfaces.
5. Trench Backfill and Restoration Construction Requirements:
a. Trench restoration shall be either by a patch or overlay method, as required and indicated on City of
Renton Standard Plans.
b. All trench and pavement cuts, which will not be overlaid, shall be made by sawcut or grinding. Sawcuts
shall be a minimum of two feet (2') outside the excavated trench width.
c. All trenching within the top four feet (4') shall be backfilled with crushed surfacing materials conforming
to Section 4-04 of the Standard Specifications. Any trenching over four feet (4') in depth may use materials
approved by the Engineer or Materials Lab for backfilling below the four-foot (4') depth.
d. If the existing material (or other material) is determined by the Engineer to be suitable for backfill, the
contractor may use the native material except that the top six inches (6") shall be crushed surfacing top
course material.
e. The trench shall be compacted to a minimum ninety-five percent (95%) density, as described in Section 2-
03 of the Standard Specifications. In the top six feet (6') of any trench, backfill compa ction shall be
performed in eight (8) to twelve-inch (12") lifts. Any trench deeper than six feet (6') may be compacted in
TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS (CONT ’D )
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twenty-four inch (24") lifts, up to the top six-foot (6') zone. All trench backfill shall be firm and unyielding
but in no case shall be compacted to more than ninety-two percent (92%) of maximum density in
permeable pavement areas.
f. All compaction shall be performed by mechanical methods. The compaction tests may be performed in
four-foot (4') vertical increments maximum. The test results shall be given to the Engineer for review and
approval prior to paving. The number and location of tests required shall be determined by the Engineer.
d. Temporary restoration of trenches for overnight use shall be accomplished by using MC mix (cold mix),
Asphalt Treated Base (ATB), or steel plates, as approved by the Engineer. ATB used for temporary
restoration may be dumped directly into the trench, bladed out and rolled. After rolling, the trench must
be filled flush with asphalt to provide a smooth riding surface. If the temporary trench restoration does
not hold up, the contractor shall repair the patch within eight hours of being notified of the problem by
the City. This requirement applies 24 hours per day, seven days per week. In the event that the City
determines to repair the temporary patch, the contractor shall reimburse the City in an amount that is
double the City’s costs in repairing the patch, with the second half of the reimbursement to represent City
overhead and hidden costs.
e. Asphalt Concrete Class E or Class B shall be placed to the compacted depth as required and indicated on
City of Renton Standard Plans or as directed by the Engineer. The grade of asphalt shall be AR-4000W. The
materials shall be made in conformance with Section 9-02.1(4) of the Standard Specifications.
f. Tack coat shall be applied to the existing pavement at edge of saw cuts and shall be emulsified asphalt
grade CSS-1, as specified in Section 9-02.1(6) of the Standard Specifications. Tack shall be applied as
specified in Section 5-04 of the Standard Specifications.
g. Asphalt Concrete Class E or Class B shall be placed in accordance with Section 5-04 of the Standard
Specifications; except those longitudinal joints between successive layers of asphalt concrete shall be
displaced laterally a minimum of twelve inches (12"), unless otherwise approved by the Engineer. Fine
and coarse aggregate shall be in accordance with Section 9-03.8 of the Standard Specifications.
All street surfaces, walks or driveways within the street trenching areas shall be feathered and shimmed
to an extent that provides a smooth-riding connection and expeditious drainage flow for the newly paved
surface.
Feathering and shimming shall not decrease the minimum vertical curb depth below four inches (4") for
storm water flow. The Engineer may require additional grinding to increase the curb depth available for
storm water flow in areas that are inadequate. Shimming and feathering as required by the Engineer shall
be accomplished by raking out the oversized aggregates from the Class B mix as appropriate.
Surface smoothness shall be per Section 5-04.3(13) of the Standard Specifications. The paving shall be
corrected by removal and repaving of the trench only. Asphalt patch depths will vary based upon the
streets being trenched. The actual depths of asphalt and the work to be performed shall be as required
and indicated on City of Renton Standard Plans.
Compaction of all lifts of asphalt shall be a minimum ninety-two percent (92%) of density as determined
by WSDOT Test Method 705. The number of tests required shall be determined by the Engineer.
TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS (CONT ’D )
Page 5 of 10 | Published: 2/16/2018
Testing shall be performed by an independent testing lab with the results being supplied to the Engineer.
Testing is not intended to relieve the contractor from any liability for the trench restoration. It is intended
to show the inspector, and the City, that the restoration meets these specifications.
h. All joints, except those associated with permeable pavement, shall be sealed using paving asphalt AR-
4000W.
i. When trenching within the unpaved roadway shoulder(s), the shoulder shall be restored to its original
condition, or better.
j. The final patch shall be completed as soon as possible and shall not exceed fifteen (15) working days after
first opening the trench. This time frame may be adjusted if delays are due to inclement paving weather
or other adverse conditions that may exist. However, delaying of final patch or overlay work is subject to
the Engineer’s approval. The Engineer may deem it necessary to complete the work within the fifteen (15)
working day time frame and not allow any time extension. Should this occur, the contractor shall perform
the necessary work, as directed by the Engineer.
k. A City of Renton Temporary Traffic Control Plan (from Renton Transportation Engineering) shall be
submitted and approved by the Engineer a minimum of three (3) working days prior to commencement
of work.
6. Removal of Utility Locate Markings from Sidewalks Required:
The permittee will be required to remove utility locate marks on sidewalks only within the Center Downtown
Zone. The permittee shall remove the utility locate marks within 14 days of job completion.
PATCHED AREA
i
A q
COVER
COVER PER STD PLAN 401
SEE NOTE 9)
SEAL WITH AR 4000 OR APPROVED
EQUAL AND DRY SAND AFTER P L A N
PATCHING NTS
OUTSIDE DIAMETER OF
SEE NOTE 9) ADJUSTMENT RING AND x SEE NOTE 2
X
gOTTOM OF FRAME
t----
MORTAR JOINT(S) (3/8" MIN.-2" MAX.) ADJUSTMENT RING (1" MIN.). SEE
SEE NOTE 3 AND SPECIAL PROVISION NOTE 6.
7-05.3(1).
SECTION A-A
NOTES
1. REMOVE PAVEMENT AND BASE MATERIALS FOR A DISTANCE 5. CONSTRUCTION AND ADJUSTMENT SHALL BE PERFORMED
WHICH IS EQUAL TO THE DIAMETER OF THE FRAME PLUS ONE ONLY BY A JOURNEYMAN MASON.
FOOT(MIN.). ADJUST CASTING FRAME TO PAVEMENT
SURFACE USING RISER RINGS AND MORTAR. 6. ADJUSTMENT OF THE FRAME TO GRADE SHALL BE
ACCOMPLISHED WITH ADJUSTMENT RINGS AND MORTAR ONLY.
2. REPLACE EXCAVATED MATERIAL WITH A MINIMUM OF 8"OF THE USE OF SHIMS IS PROHIBITED.
HMA CLASS"PG 64-22(OR TO A DEPTH THAT S 2"BELOW
THE BOTTOM OF THE UPPER ADJUSTMENT RING WHICHEVER 7• FRAME SHALL BE ADJUSTED TO PAVEMENT GRADE BY
IS GREATER)OR AS APPROVED BY THE ENGINEER. TAPPING UNTIL FRAME IS FLUSH WITH PAVEMENT AS
DETERMINED WITH A STRAIGHT EDGE OF SUFFICIENT LENGTH.
3. ADJUSTMENT RINGS AND FRAME SHALL BE FULLY BEDDED IN
MORTAR.MORTAR SHALL BE ASTM C270 FOR TYPE S. 8. ALL MORTAR JOINTS SHALL BE TRIMMED FLUSH AND REMAIN
VISIBLE UPON COMPLETION.
4. MORTAR SHALL BE MIXED AND APPLIED PER
MANUFACTURERS DIRECTIONS. 9. X=1'-0"MIN.TO 2'-6"MAX.-PER ENGINEER'S INSTRUCTION
STD. PLAN - 106
j PUBLIC WORKS TY'CAL CONSTRUCTION A ROVED:
al' DEPARTMENT AND ADJUSTMENT OF
flMANNOLERISER3
e o r>tor DA E
1 1 VARIES 1 1
MIN MIN MIN I MIN
SPECIAL NOTE: T < }
x , 4INTHEEVENTTRANSVERSEPATCHESEXISTI ;
WITHIN THE AFFECTEO STREET, THE LENGTH I I
IOFTHEPATCHSHALLBEEXTENDEDTO
INCLUDE ANY EXISTING PATCH WITHIN 10 j FEET OF THE EDGE OF THE PATCH REQUIRED iFORTHENEWCROSSINGANDANYf . .
SUBSEQUENT PATCH EDGE WITHIN 70 FEE7
OF THE EDGE OF THE SECOND PATCH AND
SO ON UP TO A TOTAL OF 300 FEET. I FACE OF GUTTER OR
i I EDGE OF PAVEMENT
k -=f--
a ;
TRAFFIC FLOW
2" HMA I r a d` i
i CENTER LINE ORILANELWE
2" TO 8" HMA i
I
6.5' MIN.
2" DEPTH OF
PLANING OR SAWCUT AND REMOVE
VARIES: 6.5' MIN.
DEPTH OF EXISTING PAVEMENT
MIN I MIN
VARIES {
MIN I MINI
2" SAWCUT AND REMOVE
OR PLANE, SEAL WITH 2" - 6" MIN. HMA (SEE NOTE 2)AR-4000W
EACH SIDE)
6" CRUSHED SURFACWG TOP COURSE (CSTC)
2" HMA 9-03.9(3)) PER WSDOT STANDARO
SPECIFICATIONS, COMPACTED TO 95% MODIFIED
PROCTOR.
SAWCUT AFTER BACKFILL
EACH SIDE)
CSTC, BANK RUN GRAVEL FOR TRENCH BACKFILL
9-03.19), GRAVEL BORROW (9-03.14(1)) PER
WSDOT STANDARD SPECIFICATIONS OR NATIVE
MATERIAL IF APPROVED IN WRITING BY ENGINEER
BASED ON GEOTECH REPORT, COMPACTED TO 95%
MODIFIED PROCTOR.
WIDTH OF TRENCH AS RE UIRED BY SIZE OF PROPOSED
IMPROVEMENT (SEE WSDOT STANDARD SPECIFICATION 2-09.4)
PLUS AN ALLOWANCE FOR ANY SHORING. SHORING, IF PIPE ZONE BEDDING. MATERIAL- SEE STANDARDNEEDED, SHALL MEET THE REQUIREMENTS OF WSDOT PLAN 110.1.
STANDARD SPECIFICATION 7-08.3(1)B
TRENCH WIDTH
FOR NOTES, SEE STANDARD PLAN 110.1
TYPICAL TRANSVERSE PATCH FOR
p - 110
PUBLIC WORKS
FLEXIBLE PAVEMENT OR RIGID F'}'R 'E;D
DEPARTMENT u j,.,,
PAVEMENT WITN OVERLAY
r T
VARIES: 4.5' MIN.
LANE LINE
MARKING SAWCUT AFTER BACKFILL
DEPTH OF EXISTING PAVEMENT
2" - 6" HMA
5EE NOTE 2) EDGE OF PAVEMENT, EDGE
OF CURB & GUTTER, OR
MIN. MIN. CENTER OF LANE MARKING
2" HMA (SEE NOTE 2) 6" CRUSHED SURFACING TOP COURSE
CSTC) (9-03.9(3)) PER WSDOT STANDARD
2" SAWCUT AND REMOVE SPECIFCATIONS, COMPACTED TO 95%
OR PLANE, SEAL WITH MODIFIED PROCTOR
AR-4000W
CSTC, BANK RUN GRAVEL FOR TRENCH BACKFILL
9-03.19), GRAVEL BORROW (9-03.14(1)) PER
WSDOT STANDARD SPECIFICATIONS OR NATIVE
MATERIAL IF APPROVED IN WRITING BY ENGINEER
BASED ON GEOTECH REPORT, COMPACTED TO
WIDTH OF TRENCH AS REQUIRED BY SIZE OF 95 MODIFIED PROCTOR.
PROPOSED IMPROVEMENT (SEE WSDOT
STANDARD SPECIFICATION 2-09.4) PLUS AN PIPE ZONE BEDDING MATERIAL AND COMPACTION AS
ALLOWANCE FOR ANY SHORING. SHORING, IF REQUIRED BY THE WSDOT STANDARD 5PECIFICATIONS
NEEDED, SHALL MEET THE REQUIREMENTS OF FOR THE TYPE OF IMPROVEMENT INSTALLED, EXCEPT:
WSDOT STANDARD SPECIFICATION 7-08.3(1)B * FOR STORM AND WATER PIPE, PER STD PLAN 220.0
FOR SANITARY SEWER, PER STD PLAN 405
TRENCH WIDTH * FOR JOINT UTILITY TRENCH, SAND WITH 95
PASSING A #4 SIEVE AND LESS THAN 5 PASSING
A #200 SIEVE
NOTES:
1. WHEN EXISTWG PAVEMENT IN A LANE REQUIRING A FULL WIDTH REPLACEMENT IS BROKEN OR DETERIORATED
TO A PAVEMENT CONDITION INDEX RATING OF 70 OR LESS, THE EXISTING PAVEMENT IN THAT LANE, AND
FOR THAT DISTANCE SO CLASSIFIED, SHALL BE REMOVED AND REPLACED WITH HMA MATCHING THE DEPTH
USED IN THE EXISTING STREET OR THE DEPTH PER CITY STANDARD, WHICHEVER IS GREATER.
2. PRINCIPAL/ MINOR/COLLECTOR, ARTERIAL, & INDUSTRIAL ACCESS STREETS - MATERIAL AND THICKNESS
SHALL BE HMA CL " PG 64-22 AND MATCH EXISTING THICKNESS AND IN NO CASE LESS THAN 6".
RESIDENTIAL ACCESS STREETS - HMA CL " PG 64-22. THE THICKNESS SHALL BE THAT OF THE EXISTING
PAVEMENT SECTION AND IN NO CASE LESS TNAN 4".
3. WHEN THE "SAWCUT AFTER BACKFILL" ENCROACHES INTO AN ADJACENT LANE, CURB & GUTTER OR
SHOULDER, THE AFFECTED LANE SHALL BE PLANED AND OVERLAID WITH HMA FULL WIDTH, THE CURB &
GUTTER SHALL BE REMOVED AND REPLACED, OR THE SHOULDER SHALL BE PLANED OR REMOVED AND
OVERLAID WITH HMA.
4. IF TRENCH UNDERMINES EXISTING SIDEWALK AND/OR CURBS, THEN THE SIDEWALK AND/OR CURB SHALL BE
REPLACED FROM EXPANSION JOINT TO EXPANSION JOINT.
5. IF TRENCHING THROUGH EXISTING DRNEWAY OR SIDEWALK RAMP, THE DRIVEWAY OR SIDEWALK RAMP SHALL
BE REPLACED TO MEET ADA STANDARDS.
TYPICAL LONGITUDINAL PATCH
S"PD. PLAN - 110.1
PUBLIC WORKS FOR FLEXIBLE PAVEMENT OR P1'R ;1;D
DEPARTMENT
RIGID PAVEMENT WITH OVERLAY
o
LANE ] LAt E LANE i
f
t ii
1 :
f I
f
l
j 4
INITIAL 2" DEEP SAWCUT OR GRIND, AND
LIMIT OF FINAL OVERLAY. GRIND AND PAVE
r FULL STREET WIDTH OVERLAY REQUIRED.
J 'r
t
1 J
f/
t
I ce:
t(. p_.
2:
t -, / . -I / t'
If
r .. }t ,
1
i f 1` I
t f
EDGE OF EXISTING PAVEMENT
11
EDGE OF TRAVELED LANE (EDGE STRIPE)
t
VARIES: 4.5' MIN. (SEE STD PLAN 110.1)fI
CENTER OF ANY MARKED LANE LINE,
PROVIDE NEW CHANNELIZATION AFTER OVERLAY
F
t1
i r SECONDARY FULL DEPTH SAWCUT FOR
4 PROPOSED TRENCH
t f
I
INITIAL 2" DEEP SAWCUT OR GRIND, AND
f LIMIT OF FINAL OVERLAY. GRIND AND PAVE
FULL STREET WIDTH OVERLAY REQUIRED
CANE LAtV LANE
r ___ _0
i __
FOR TYPICAL SECTION AND NOTES SEE STANDARD PLAN 110.1
3TD. PLAN - 110.2
PUBLIC WORKS REQUIRED SAWCUT, GRIND AND ppR' 'I,D:DEPARTMENT OVERLAY FOR LONGITUDINAL TRENCHES Q -
R
PORTLAND CEMENT CONCRETE (PCC) SHALL MEET THE
MATERIAL AND CONSTRUCTION REQUIREMENTS OF WSDOT
STANDARD SPECIFICATION 5-05
SAW CUT SHALL BE VERTICAL
SAW CUT SHALL BE VERTICAL AND IN STRAIGHT LWES
AND W STRAIGHT LINES
EXISTING CONCRETE
PAVEMENT
s - SEE NOTES BELOW
SEE WSDOT STANDARD i `
ii''
I
SPECIFICATION 5-01.3(6)6"
AND NOTES BELOW MIN.
6" MIN.12'
EXISTING COMPACTED BASE
SIDE OF TRENCH Z MIN.
SIDE OF TRENCH
CSTC, BANK RUN GRAVEL FOR TRENCH BACKFlLL
9-03-9(3)), GRAVEL BORROW (9-03.14(1)) PER COMPACTED CRUSHED SURFACING
WSDOT STANDARD SPECIFICATIONS OR NATIVE TOP COURSE.
MATERI A IF APPROVED IN WRITING BY ENGINEER
BASED ON GEOTECH REPORT, COMPACTED TO 95%
MODIFIED PROCTOR.
PANEL REPLACEMENT DETERMINATION NorEs:
FULL CEMENT CONCRETE PANEL REPLACEMENT: t, rRnNsvERSE owrs
FOR CEMENT CONCRETE SURFACE STREETS, THE
1/2" DIAM. X 18" 12" DOWEL BARS
ON CENTER MEETING WSDOT STANDARD
MINIMUM RESTORATION SHALL BE FULL PANEL SPECIFICATION 9-07.5.
REPLACEMENT, IF ONE OR MORE OF THE FOLLOWING
CONDITIONS EXIST: 2. LONGITUDINAL JOINTS
5 TIE BARS X 30" 36" ON CENTER
MEETING WSDOT STANDARD SPECIFICATION
9-07.6.
CONDITIONS ADDITIONAL REQUIREMENTS
3. WHEN THE PCC PANEL IS LESS THAN 8"
IN THICKNESS J 5 TIE BARS X 30" SHAL
ALL BUS ROUTES BE USED. FOR TRANSVERSE JOINTS TIE
BARS SHALL 8E ON 36" CENTERS WITH
NO LESS THAN 2 BARS PER SIDE ON
ALL INTERSECTIONS PLUS ONE PANE BEYOND THE SMALL REPAIRS OR REPLACEMENT
CURB RETURN PANELS.
40 OR GREATER OF 4. TIE BARS AND CORROSION—RESISTANI
EXISTING PANEL REMOVAL DOWEL BARS SHALL BE PLACED IN
ACCORDANCE WITH WSDOT STANDARD
SPECIFICATION 5-05.3(10).
EXCELLENT CONDITION (BASED
ON VISUAL AND/OR 5. DOWELS SHALL NOT BE USED WHEN PCC
NON—DESTRUCTION TESTING PANEL IS ESS THAN 8" IN THICKNESS.
6. NEW PCC PANEL SHALL MATCH
PRINCIPAL, MINOR, COLLECTOR THICKNESS OF EXISTING CONCRETE
ARTERIALS AND ALL STREETS PAVEMENT.
IN CBD WITHOUT BUS ROUTES
7. FULL PCC PANEL REPLACEMENT IS NOT
REQUIRED WHEN OVERLAID WITH ASPHALT
PAVEMENT.
TYPICAL PATCH FOR RIGID STD. PLAN - 111
PUBLIC WORKS pAVEMENT WITHOUT ASPHALT I'l'I'.C E;I)DEPARTMENT
CONCRETE OVERLAY J(J -