Continuous Lake Flooding: The insured building must be inundated by lake water for 90 continuous days, and it must be reasonably certain that the continuation of this flooding will result in damage equal to or greater than policy limits, or the ACV or Replacement Cost Value (RCV), as applicable. If it is not reasonably certain that the flooding will cause a total loss, then the insurer will pay only for the actual damage up to the waterline. See Section VIII of the Claims Manual, Special Adjustment Issues, for more information about continuous lake flooding.
Closed Basin Lakes: A closed basin lake is a natural lake from which water leaves primarily through evaporation and whose surface area now exceeds or has exceeded one square mile at any time in the past. If an insured building is subject to continuous closed basin lake flooding, a total loss claim can be paid if lake flood waters damage or imminently threaten to damage the building and an eventual total loss appears likely.