Plan commission approves UDC amendments creating tree mitigation fund and clarifying preservation rules

Aug 27, 2025

The commission unanimously approved UDC text amendments (sections 18.01.61–65) that clarify when tree preservation plans are required, set a process for approving removal of more than 80% of a specimen tree, and create a tree mitigation fund for planting, acquisition and education; staff cited recent case law as the reason for changes.

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The Onalaska Plan Commission on Aug. 26 unanimously approved text amendments to the Unified Development Code (UDC) addressing tree protection and restoration, including the creation of a tree mitigation fund.

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