Diagram showing Montana's SMZ guidelines: SMZ width varies in response to factors like slope, type of stream, and populations of vulnerable fish and wildlife species; these widths are examples of the State of Montana's BMPs.
(OHWM = ordinary high water mark)

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2. Streamside Management Zones (SMZs) - continued

Limiting disturbances in and near SMZs can protect one of the most environmentally sensitive areas in the forest. The width of the SMZ should be based on factors such as:

  • erosiveness of the soil;
  • steepness of the bank slopes;
  • proximity to municipal watersheds;
  • protection of adjacent wetlands; and
  • sensitivity of the fish and wildlife habitat and other critical areas.

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Section 12 of 38