Page 74 - CCGA Best Practices Version English

The owner should provide the notification service and associated locate
service providers and design consultants with data (e.g. electronic or
paper records, fiche, or other indexing of underground facilities) that will
allow proper ticket creation and notification of excavation activities near
the owners’ infrastructure and allow the locator to accurately mark the
underground facility.

The mapping system standards and data specifications should be consistently
applied across the owner’s facilities and communicated to those involved
in data exchange or data integration processes. The process of collecting,
storing and managing the mapping records should be clearly documented
and whenever possible the location of buried facilities should be established
during the installation process when these are still visible and their positions
can be most accurately measured and recorded. Generally the owner should
capture the following information to ensure safety and success in the
planning, design, construction, documentation, location, and maintenance of
their facilities:
a. horizontal and vertical position of buried facility;
b. cross-sectional size of duct bank or cable trench;
c. number and size of conduits, pipes, or number of direct buried
cables if not in cable trench; and
d. facility's external material type that would be first encountered if
exposed.

Current Practice:
• Notification service accepts digital or hard copy information of single line
data with digital information preferred. For acceptable file formats and
additional mapping options, please contact your regional notification
service. The onus is on the facility owner to provide updates in the
accepted formats.

• Facility information is currently provided to locate service providers in
varying formats as determined by owners.
• Some larger municipalities have developed composite utility mapping
systems (e.g. Toronto DMOG) that display multiple utility infrastructure
in the area on an accurate common base map for use in the planning,
design and construction of new infrastructure projects.

5-5: Project Owner Responsibilities and
Use of Mapping

Practice Statement: The project owner provides accurate information
on the scope of work and determines the starting and ending points,
ideally by providing basic coordinates which define the centreline or area of
construction.

Canadian Common Ground Alliance
Best Practices Version 3.0 – October 2018
67