OnDemand - 250K - HYDRO - Rapids - Waterfall - Line

An area of swift current in a stream or river, characterized by standing waves or by boulders and rocks. Rapids exist as point, line, or polygon. May be a named feature. Or a vertical or near vertical descent of water over a step or ledge in the bed of a river. Waterfall exists as an NHDPoint and NHDLine. May be a named feature.