CITY OF BURNABY PAVEMENT RESTORATION POLICY
Version 1.0 2020 July 22
BACKGROUND
The deterioration of the road is accelerated when cuts are made into the pavement for
various purposes, such as utility installations and subsurface investigations, and when these
cuts are not properly restored. To protect the City’s investment on roads, all parties must
make every effort to coordinate underground construction with paving projects to avoid
pavement cuts, and any unavoidable pavement cuts shall be restored to a high standard.
This Road Restoration Policy sets the standard for restoration of all City’s roads. This policy
will help ensure that road surfaces are safe for all users and minimize the accelerated
degradation of the roads resulting from pavement cuts.
POLICY
AUTHORIZATION OF PAVEMENT CUT
1. All pavement cuts shall be authorized by the City as a part of the Minor Work Permit,
Standard Street Works Permit, or other agreements with the City. Permit application
fees and the City’s Pavement Degradation Fees are required through the permits. All
work shall conform to the City of Burnaby Bylaws, including the Burnaby Street and
Traffic Bylaw 1961 and the Burnaby Noise or Sound Abatement Bylaw 1979;
2. Deviations from or modifications to this Policy are at the discretion of the City Engineer.
Proposals for alternate restoration methods shall be submitted to the City and approved
in writing by the City Engineer prior to excavation;
APPLICATION OF POLICY
3. The following table outlines the application of this policy and the associated permit or
agreement that would refer to this policy. Note that this policy is still best practice
across the City even for work that requires no permit or agreement.
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SMALL STANDARD EXCAVATIONS
EXCAVATIONS (e.g. utility and service trenches)
(e.g. test holes)
Work Completed By Minor Work Standard Project Best Practice
Permit Street Works Agreement
Permit
City Forces
City Capital Projects*
Third-Party Works
Metro Vancouver
Projects**
Development Works
*City Capital Projects typically include full width road restoration.
** The GVS&DD and GVWD Policy on Pavement Restoration for Sewer and Water Main
Installations applies to Standard Excavations by Metro Vancouver.
ASPHALT AND CONCRETE CORING
4. Final restoration of asphalt or concrete cores up to 200 mm diameter shall be
completed immediately following the coring operation. Restoration of cores shall
involve filling the cored area with non‐shrink, high strength grout and ensuring that the
final surface is flush with surrounding ground;
5. Non‐shrink, high strength grout refers to a cement‐based grout that contains non‐
metallic and anti‐shrinkage compounds blended with graded siliceous aggregate and
Portland cement. The grout shall be designed for its application, whether it is flexible
pavement repairs for asphalt coring or rigid pavement repairs for concrete coring. An
example of such product is TARGET® Traffic PATCH™ Coarse;
ALL EXCAVATIONS
6. All other restorations shall conform to requirements in the City of Burnaby
Supplementary Specifications & Standard Detailed Drawings and the Master Municipal
Construction Document (Platinum Version). The following Standard Detailed Drawings,
attached, describes the requirements of this policy in graphics format:
BBY‐R114 Pavement Restoration
BBY‐R115 Permanent Pavement Restoration Areas
BBY‐R116 Permanent Pavement Restoration Areas at an Intersection.
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7. Temporary restoration can be applied to all excavations but shall be permanently
restored within six months;
8. No temporary restoration can be left unpaved if the area will be opened for traffic.
Temporary road steel plates, where approved by the City, shall be designed and
monitored by a Professional Engineer;
9. Final restoration of all excavations shall be completed to match existing conditions or
better;
10. All edges of the final pavement restoration shall be saw cut or milled straight lines which
are perpendicular or parallel to the lane;
11. All areas that experience sloughing of trench walls and/or undermining of materials
below the asphalt along trench walls shall be marked on the surface during
construction. Prior to final restoration, the full depth of asphalt at these locations shall
be saw cut and removed and reconstructed with proper compaction in full depth;
12. Permanent restoration of asphalt surfaces shall be machine‐placed and compacted
using rollers. Hand placed asphalt will not be accepted as permanent restoration;
13. Finished surface of permanent restoration shall be within 6 mm of existing elevation.
Finished surface of temporary restoration shall be within 15 mm of existing elevation;
14. Restoration of all concrete works, including sidewalks, curb & gutter, and driveways
requires replacement of full concrete panels between existing dummy joints or
expansion joints. The Contractor shall complete concrete cylinder tests in accordance to
minimum material testing requirements in the City's Supplementary Specifications;
15. Where existing road structure is composed of structural strengthening features (e.g.
concrete slabs, controlled density fill, lightweight fill, geo‐synthetic systems, etc.), the
features shall be replaced like‐for‐like and connected to existing systems as per the
manufacturers’ and the City requirements;
16. Special surface treatments such as coloured concrete/asphalt or stamped
concrete/asphalt shall be replaced like‐for‐like. Contractor shall present the City with a
mock‐up for approval prior to installation;
17. Restoration of permanent pavement markings, survey monuments, and traffic detector
loops embedded in the pavement is the responsibility of the Contractor. The Contractor
shall provide and maintain temporary pavement markings until permanent pavement
markings are installed. All temporary pavement markings shall be removed immediately
following installation of the permanent markings;
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18. All sawcut lines that extend beyond the permanent patched area shall be sealed with
pavement crack sealer as part of permanent restoration;
SMALL EXCAVATIONS
19. A small excavation refers to any cut in the pavement that is smaller than one meter by
one meter in size, for applications including asphalt coring, test holes, monitoring wells
installation and removal, etc.;
20. Temporary restoration of all small excavations, excluding coring, shall be backfilled using
19mm crushed granular gravel and filled with non‐shrink, high strength grout from 50
mm below the underside of the existing pavement up to the pavement surface;
21. Monitoring wells or boreholes where groundwater is encountered shall be
decommissioned according to the City of Burnaby “Wells/Boreholes and Vacuum Holes
Decommissioning Procedure”. Alternate decommissioning methods in accordance to
ASTMD5299/D5299M ‐ “Standard Guide for Decommissioning of Groundwater Wells,
Vadose Zone Monitoring Devices, Boreholes, and Other Devices for Environmental
Activities” may be proposed to the City Environmental Services Division in writing for
acceptance prior to completing the work;
22. Final restoration area shall be at minimum a 1.2 meter by 1.2 meter square or diamond
per BBY‐R115;
23. For permanent restoration, final asphalt inlay of small excavations shall be completed in
accordance to BBY‐R114 using crushed granular materials and hot‐mix asphalt. Cold‐mix
asphalt is not to be used. Grout from temporary restoration shall be removed;
24. Permanent restoration of small excavations that are within 2.0 meters of each other in
the same lane shall be combined and restored as a standard excavation;
25. Extend final paving to the edge of pavement when a repair is within one meter to the
edge of the pavement;
STANDARD EXCAVATIONS
26. A standard excavation refers to any cut in the pavement that is larger than one meter by
one meter in size;
27. Temporary restoration and permanent restoration shall be completed using crushed
granular materials and hot‐mix asphalt in accordance to BBY‐R114. Cold‐mix asphalt is
not to be used;
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28. Restoration of excavations that are within 5.0 meters of each other in the same lane
shall be combined;
29. Permanent pavement restoration will be to a full lane width and minimum 2.0 meters in
length in the direction of travel. If a road has no lane markings, then the extent of
paving will be the centerline of the road to the curb or road edge. If a cut is within the
bike lane or paved shoulder, the extent of paving will be from the painted line to the
edge of the pavement, and 2.0 meters in length in the direction of travel. The above
apply to all lanes that a standard excavation may extend into, regardless of the size of
extension into each lane;
30. Permanent pavement restorations along travelled lanes shall be in accordance to BBY‐
R115;
31. Permanent pavement restorations within intersections shall be in accordance to BBY‐
R116. Edge of all permanent restoration shall be at an intersecting lane line, centerline,
painted line, or edge of pavement. Where the intersection is restored in the curb lane
area next to a curb return, final paving shall be extended to the curb return;
32. A settling period to allow for trench settlement prior to final mill and pave shall be
determined by a geotechnical engineer. The suggested minimum settling period before
final restoration is three months;
INSPECTION AND WARRANTY
33. The Contractor is responsible for monitoring and maintenance of any temporary
restoration before final restoration is completed;
34. The Contractor is responsible for restoration of any damaged area outside the limits of
the excavation caused by their construction equipment and operation, unless the
Contractor can clearly demonstrate that the damage is pre‐existing;
35. Limits of final pavement restoration shall be determined during a walkthrough between
City representative and the Contractor prior to completing the work;
36. Temporary and final restoration shall be completed to the satisfaction of the City
Engineer, and;
37. All permanent restorations shall have a warranty period of one year. The warranty
period shall start over every time rehabilitation work required and performed on the
permanent restoration. Warranty shall cover defects including settlement, poor
workmanship, inadequate compaction and cracks.
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