PUBLIC WORKS
Toronto Water Integrated
Network Skeletonization
(TWINS)
City of Toronto
The City of Toronto’s water network includes
more than 3,500 miles of water mains, more
than 65,000 water valves, almost 42,000
hydrants, and 450,000 service connections.
While the detailed network data is ideal for
the needs of engineering and maintenance
crews, the number of graphic details and
database records required to maintain it
posed problems for the city’s asset management group, which uses the data to model
the water network and manage the capital
work plan.
more than $1 million Canadian. With the
WaterGEMS Skelebrator module from
Bentley’s Haestad Methods product line, the
city was able to automatically generate a separate data set to support the business
processes of the asset management group.
While the physical network contains 307,956
pipes, the new asset management network
model contains 76,989 pipes – one quarter
the complexity. ;
The answer was to create a twin water network with the lower level of detail required
for the business of asset management. The
cost of this was initially estimated by Toronto
to be $600,000 Canadian, with additional
downstream maintenance costs of $500,000
Canadian over a 10-year period.
However, Bentley offered the city an alternative solution that was much easier to implement and administer, and will save the city
