SummaryBuilding standard and cost of maintaining levees/assessed value of the land use they protect. This ratio of benefit to cost helps us understand levees are the most important in a system. General Information about this IndicatorWhat is it?: Levees must be maintained and occasionally strengthened to provide consistent flood-protection to lands in the floodplain. The ratio of incremental and cumulative costs of maintaining levees and the value of development protected by the levees provides a form of cost-benefit analysis for levee maintenance and prioritization.