Page 21 - CCGA Best Practices Version English

1-15: As-Built Drawings

Practice Statement: As-built drawings that depict the features and
asconstructed location of newly installed or modified underground utilities
should be specified as a contract/project deliverable and should be prepared
as soon as practicable after completion of construction.
Practice Description: Installation(s) should be made in accordance with
the approved construction plans and any deviation from those plans should
be recorded on as-built drawings. The as-built drawings should be completed
as soon as practicable and retained by the owner of the utility. The
information should be made available for future projects and to aid in future
locates and construction.
As-Built Drawings generally include:
• Utility owner company name;
• Utility type or function;
• A location description of the project referenced to the title description or
geographic location; Any deviations in construction from the approved
design with a reference to the construction drawing;
• The horizontal and vertical locations of the centreline of the underground
utility;
• The level of accuracy of the horizontal and vertical locations of the
underground utility;
• The methodology used to measure the accuracy of the horizontal and
vertical locations, e.g. geodetic survey, or relationship to topographical/
physical features at the time of construction;
• Extent of the object (width, height, length and diameter as applicable);
• Notation of the material of the outside structure;
• A reference to the source of the as-built measurements by company
name, file number and date of the measurements;
• A north arrow, scale bar and scale ratio;
• Legend depicting all items on the drawing
• The method of construction, e.g. directional drilling.
Current Practice: During and after completion of construction and
prior to final acceptance of the installation by the Owner, all “as-built”
measurements should be made and recorded on as-built drawing(s).
Typically these measurements note any deviation in horizontal and/or vertical
alignment from the established baseline, the location of valves, access
chambers, manholes, service boxes and stub connections for services. In
addition they should note final invert elevations, pipe size, grade changes,
any applicable structural details of manholes/chambers and any other
information as deemed necessary that may affect future maintenance of
the utility. All drawings should note these changes “As Recorded” with date
on the drawings in a prominent location. This updated information should
be circulated among the pertinent parties involved in the project as soon
as practicable, (i.e. municipalities, utilities, public works authorities, Utility
Coordination Committees) and those parties should update their records
accordingly. In this way, utility records can be maintained as current as
possible.

Canadian Common Ground Alliance
Best Practices Version 3.0 – October 2018
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