This strategic response ensures a high
degree of resilience for all those assets for
which the consequence of failure is so great
that it cannot be mitigated by an operational
response, such as rezoning or tankering. It is
unnecessary to achieve the same level of
protection at all our other assets as their
failure can continue to be mitigated through
operational means. For these critical assets,
Welsh Water has made an assessment of
the resilience to the following threats:
security, flooding, coastal erosion,
catastrophic failure, contamination, loss of
power and cyber threat. We propose a riskbased
approach, targeting assets with a high
consequence of failure first. We have
identified the following measures to improve
resilience:
• Complete security upgrades;
• Installation of flood resilience measures
around critical assets;
• Improvements to power resilience and
onsite power generation;
• Upgrades to treatment works control
systems;
• Improvements to treatment flexibility to
deal with varying raw water conditions;
• Improvements to maintain access;
• Develop, test and refine business
continuity plans for key assets; and
• Twinning of strategic mains crossing
under rivers, roads and railways.
Dams and dam pipework are considered in
strategic response 2, “enough water for all”.
We have also recognised the need to
develop ‘best practice’ resilience design and
operation standards.