Faults at Clypse Reservoir in Onchan found during routine inspection
One of the Island's four main supply reservoirs is being drained after a critical valve failed during a routine inspection.
Clypse Reservoir in Onchan supplies raw water to the Douglas water treatment works and onward to consumers in the eastern and southern regions of the Island.
The faults have been found in the submerged valving system and Manx Utilities says that 'to ensure continued water supply and maintain reservoir safety, both valves and their actuators will have to be replaced'.
A second valve will also be refurbished as part of the works.
As the valves are located underwater, the reservoir must be fully drained to allow safe access.
The draining process is already underway and is being carefully managed to protect the structural integrity of the dam and minimise water waste.
It is anticipated that the reservoir will be fully emptied by mid-September, with valve replacement works scheduled to follow.
The refurbishment will be carried out by Manx Utilities’ engineers in collaboration with a specialist contractor.
The valve replacement is expected to take approximately two weeks.
Refilling the reservoir will take several months and is dependent on seasonal weather conditions throughout autumn and winter.
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