Intermittent Streams

BMP guidelines recommend that a minimum of a 50 foot SMZ be left on both sides of a intermittent stream in order to filter sediment from overland flow and to provide shade for stable water temperature.  Other benefits of leaving an SMZ include but are not limited to: providing travel corridors and habitat for wildlife, adding aesthetic quality to a harvest area, and possibly reducing your property taxes.

Intermittent streams flow at least 30% to 90% of the year under normal conditions.  If the flow of the stream can’t be determined, the presence of 5 or more of the following characteristics may help identify the stream as an intermittent stream.