Table 3

1 January 2000

Table 3: Classification of dams in terms of incremental consequences of dam failure

Incremental consequence categories	A. incremental consequences of failure from floods >IDF		Incremental consequences of failure from other causes
	Incremental Hazeard-to-Humans Index, IhtHI (plus suggested corresp. IDF)	Economic, social & environmental consideration	Life safety consideration	Economic, social & environmental Consideration
Very High	>100 (IDF: 100,000-yr/PMF)	Extreme damage	Large number of lives lost	Extreme damage
High	1 to100 (IDF: 1000-to100,000-yr/PMF)	Large damage	Some lives lost	Large damage
Low	<1 (IDF: <1000-year)	Moderate damage	Less than one life lost	Moderate damage
Very low	0	Minor damage beyond owners property	No life lost	Minor damage

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