Department of Water Resources

Mapping and Data

Dam Guidelines - Size

The size of a dam in Nevada is defined as follows (NAC 535.130):

Small Dam: - has an embankment less than 20 feet in height and reservoir capacity less than 100 acre-feet.

Medium Dam: - is any dam that is neither small nor large.

Large Dam: - has an embankment height greater than 50 feet or a reservoir capacity greater than 10,000 acre-feet.

Please note that if an embankment height dictates one size dam and the reservoir capacity dictates a different size dam, the larger of the two designations shall apply, e.g. a dam that has an embankment height of 2 feet and a reservoir capacity of 9,000 acre-feet shall be designated a medium size dam.