The Common Line Mitigation Plan can be prepared by homeowners or designers follwing the methodology below


Mitigation planting should incorporate multiple heights (multi-storied) and at least 5 different species of vegetation. At least 25% of the mitigation area must consist of large trees, small trees, and/or large shrubs. See Common Line Mitigation Manual Table B-3 for native plant species, separated by size, below.


Submitting Your Mitigation Plan

You can submit the plan using the steps found on page 12 of the Common Line Mitigation Manual, found here.

Mitigation Calculations

For calculating mitigation based upon square footage of impact, please use our Mitigation Planting Quantity Calculator

Note, use of the calculator is for educational purposes only. Contact the Mason County Planning Department prior to implementing any mitigation plan derived from this calculator.


Mason Conservation District

Since 1956, the Mason Conservation District (MCD) works collaboratively to help landowners in Mason County responsibly and efficiently manage their land and associated natural resources. They are a fantastic resource for those who still need help beyond this guide or would like assistance in creating a mitigation plan, off-site mitigation eligibility, or soft shore design, for example.

People can contact MCD through their website at https://www.masoncd.org/.