Forest Practices Approved Watershed Analyses
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Forest Practices Approved Watershed Analyses 
Watershed Analysis 

APPROVed Watershed ANALYSEs

Watershed analysis is a biological and physical assessment of a watershed designed to address the cumulative effects of forest practices on specific public resources (fish, water, and capital improvements of the state) and on cultural resources. The Watershed analysis process was created in 1992.

These in depth watershed specific studies produced mass wasting prescriptions to be applied within Mass Wasting Map Units containing potentially unstable landforms. Potentially unstable landforms commonly identified in most watersheds across the state were inner gorges, bedrock hollows, convergent headwalls and deep seated landslides. These features along with others are currently addressed in the forest practices rules.  Watershed analysis also began to establish standards for technical reports and requirements for specialized scientists.  Current forest practices rules now require a qualified expert and a geotechnical report when potentially unstable landforms could be affected by a forest practices proposal.

DNR has reviewed all watershed analyses and determined that a reanalysis of mass wasting prescriptions would be required to validate their effectiveness.  Landowners were contacted and most opted not to complete a reanalysis and agreed to follow the forest practices rules for activities affecting potentially unstable landforms. Where reanalysis will not occur, the DNR has completed the SEPA process to rescind mass wasting prescriptions. Rescinded mass wasting prescriptions are still available on this site and may be used as a screening tool.

Click here to see the approved Watershed Analyses with Mass Wasting Prescriptions Rescinded.

Click here to access approved Watershed Analyses.

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 Contacts

Leslie Lingley
Forest Practices Science Team Lead
360-902-2138
leslie.lingley@dnr.wa.gov

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