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CITY OF RENTON Ι PERMIT SERVICES
TRENCH RESTORATION AND STREET
OVERLAY REQUIREMENTS
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.
SPECIFIC CODE SECTION RELATED TO THIS DOCUMENT
RMC 9-10-11 Trench Restoration and Street Overlay Requirements
PURPOSE
The purpose of these standards 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 development engineer, 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.
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.
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TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS
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):
•The minimum width of a transverse patch (road crossing) shall be six and one-half feet (6.5'). See City
of Renton Standard Plans.
•Any affected lane will be ground down two inches (2") and paved for the entire width of the lane.
•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.
•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.
•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:
•The minimum width of a longitudinal patch shall be four and one-half feet (4.5'). See City of Renton
Standard Plans.
•If the trenching is within a single traveled lane, an entire lane-width overlay will be required.
•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.
•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.
•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. Potholing 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.
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TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS
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 compaction shall be
performed in eight (8) to twelve-inch (12") lifts. Any trench deeper than six feet (6') may be compacted in
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.
g.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.
h.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.
i.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.
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TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS
j.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.
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.
k.All joints, except those associated with permeable pavement, shall be sealed using paving asphalt AR-
4000W.
l.When trenching within the unpaved roadway shoulder(s), the shoulder shall be restored to its original
condition, or better.
m.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.
n.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;DDEPARTMENT 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 ASALLOWANCEFORANYSHORING. 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 If
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` It 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''
ISPECIFICATION5-01.3(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 STANDARDMINIMUMRESTORATIONSHALLBEFULLPANELSPECIFICATION9-07.5.
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 PCCNON—DESTRUCTION TESTING PANEL IS ESS THAN 8" IN THICKNESS.
6. NEW PCC PANEL SHALL MATCHPRINCIPAL, MINOR, COLLECTOR THICKNESS OF EXISTING CONCRETEARTERIALSANDALLSTREETSPAVEMENT.
IN CBD WITHOUT BUS ROUTES
7. FULL PCC PANEL REPLACEMENT IS NOT
REQUIRED WHEN OVERLAID WITH ASPHALT
PAVEMENT.
TYPICAL PATCH FOR RIGID STD. PLAN - 111PUBLICWORKSpAVEMENTWITHOUTASPHALT I'l'I'.C E;I)DEPARTMENT
CONCRETE OVERLAY J(J -