Total Reservoir Volume (a)

Potential for loss of human life (b)

Environmental impact (c)

Socioeconomic impact (d)

Small

< = 5 million m³

(1)

NONEXISTENT (there are no permanent/resident or temporary/transiting persons in the affected area downstream of the dam) (0)

SIGNIFICANT (affected area of the dam does not represent an area of environmental interest, areas protected under specific legislation or it is totally devoid of its natural conditions) (3)

NONEXISTENT (there are no facilities and navigational services in the area affected by the dam accident) (0)

Medium

5 million to 75 million m³ (2)

INFREQUENT (there are no persons permanently occupying the affected area downstream of the dam, but there is a side road of local use) (4)

VERY SIGNIFICANT (affected dam area shows relevant environmental interest or protected under specific legislation) (5)

LOW (there is a small concentration of residential and commercial, agricultural, industrial or infrastructure facilities in the affected dam area or port facilities or navigational services) (4)

Large

75 million to 200 million m³

(3)

FREQUENT (there are no persons permanently occupying the affected area downstream of the dam, but there is a municipal, state, federal or other local highway and/or possible building of potential permanence of persons that may be affected) (8)

-

HIGH

(there is a large concentration of residential and commercial, agricultural, industrial facilities, leisure and tourism infrastructure and services in the affected area of the dam or port facilities or navigational services) (8)

Very large

>200 million m³ (5)

EXISTING (there are persons permanently occupying the affected area downstream of the dam, therefore human lives may be affected)

(12)

-

-