Frank Van Der Kleij, Interim Head of Asset Management at Bristol Water, said: “Having seen the benefit of these on-site plans, as well as in light of the upcoming legal requirement, we have asked HR Wallingford to give our plans a thorough overhaul to make them comprehensive and up-to-date, enabling fast and efficient response in the unlikely event of an incident at one of our reservoirs.”
“On-site plans are by their nature very detailed,” explained HR Wallingford Supervising Panel Engineer Matthew Atyeo, who is helping Bristol Water update their plans. “For instance, they go into precise details on which valves to open or close to safely drain the reservoir in an emergency scenario.”
The ministerial direction will not specifically cover off-site emergency community evacuation flood plans which are held by emergency responders, but recognises that they should work with the on-site plan.
When giving advice to reservoir owners, HR Wallingford draws on its 20+ years’ experience in the modelling of and planning responses to dam breach incidents, using tools such as EMBREA dam breach model and Life Safety Model. The latter is ideal for developing emergency plans for dams by assessing the risks to people and evacuation times for various scenarios.
*Note that in April 2021, as expected, it became a legal requirement for large raised reservoirs to have an emergency flood (on-site) plan: www.gov.uk/government/publications/reservoir-on-site-flood-plans-ministerial-direction