Oak‑loss maps prompt McHenry County panel to direct staff to draft tree‑preservation approach
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Summary
A retired conservation district expert told the committee McHenry County has lost large swaths of mature oaks since settlement; commissioners asked staff to study Lake County and other models and return with a locally tailored tree‑preservation ordinance, plus legal review.
A long‑running decline in McHenry County's mature oak woodlands drew sustained attention at the April 7 Planning, Environment and Development Committee meeting, where a retired conservation‑district expert urged immediate county action and commission direction to draft a tree‑preservation framework.
Edward (conservation expert) told the committee that oak cover in the county has fallen from an estimated 143,000 acres in 1837 to roughly 18,000 acres by 2005 and that additional losses occurred through 2022; he asked commissioners to prioritize avoidance and stronger mitigation for oak stands because mature oaks take decades to recover. "If oak loss continues at the rate that it is currently happening, most unprotected oak stands will be gone within the next two decades," he said.
Why it matters: oak communities provide watershed benefits, carbon storage and vital insect and bird habitat, and several commissioners said the county needs a workable ordinance that avoids undue burdens on small landowners while protecting significant stands.
Options and committee direction
- Models under consideration: staff summarized two approaches used in neighboring counties. Lake County's ordinance takes a resource‑based approach with site assessments and preservation percentages (e.g., minimum preservation thresholds for mature woodlands). King County's draft is more tree‑by‑tree and includes heritage trees; it is broader but has not been universally adopted.
- Staff recommendation and next steps: commissioners asked staff to pursue additional due diligence—compare Lake and King County frameworks, consult conservation partners for an updated oak map (through county GIS), and work with the state's attorney's office on legal limits and enforcement costs. Alex (staff) described the next step as producing a locally tailored draft and meeting with counterparts in counties that administer similar ordinances.
- Early, voluntary measures: Edward recommended immediate non‑regulatory steps the county can require of applicants (use the county's oak maps on file, provide a tree inventory for mapped groves, prioritize avoidance) while a full ordinance is developed.
The committee directed staff to return with a recommended approach and legal analysis; commissioners emphasized balancing enforceability and administrative cost. No ordinance was adopted at the meeting.
