- Additional analysis is required to determine storage capacity regarding future
development as peak hourly demand will exceed current capacity in 2041 -
by Sylene Argent, Local Journalism Initiative
Essex Council received a report outlining results for the Harrow-Colchester South Water Supply System Model during the August 12 meeting.
Rob Mackie, Manager of Environmental Services for the Town of Essex, noted Essex Council appointed CIMA+ (previously known as C3 Water) to develop a water model of the Harrow-Colchester South Water Supply System back in September of 2022.
The project commenced in October of that year, with C3 analyzing up-to-date GIS information, water treatment plan operational data, water billing records, and annual water production data, Mackie said. In addition, future development demand data was also incorporated into the model.
“With developments increasing, there is a need to study our water system and develop a hydraulic water model that would help analyze potential service demand impacts, as well as fire flows, water quality, and day-to-day operations,” Mackie told Council.
In October of 2023, C3 completed the model and issued a technical memorandum.
In February of this year, the high-lift pumps at the Harrow-Colchester Water Treatment Plant were tested and analyzed to develop pump-curves to further confirm the accuracy of the water model.
Mackie noted analysis of future development shows that in 2041 the average daily demand and maximum daily demand of the treatment plan will be within the treatment capacity. Peak hourly demand, however, will exceed current capacity.
Additional analysis will be required to determine storage capacity with future growth.
This model will also be utilized for high-level servicing and the soon-to-be-created Servicing Master Plan.It will also aid future growth-related projects and will be updated every two-years, based on the consultant’s recommendations.
Essex Mayor Sherry Bondy thanked Mackie for presenting the report, noting she found it fascinating to look at the map and see how far one lives from a water tower or source determines pressure in fire hydrants.
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