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Committee seeks technical answers on stormwater rules after questions about gravel driveways and solar farms
Summary
Will County committee discussed how the draft stormwater chapter classifies gravel surfaces and how solar installations are treated for impervious-surface calculations. Members asked land-use and stormwater staff to attend the Executive Committee to explain enforcement and the definition of 'impervious.'
Committee members raised technical questions on Sept. 9 about Chapter 55, the proposed stormwater management ordinance, asking staff to clarify when gravel counts as impervious surface and why solar sites face stricter treatment than other land uses.
The exchange focused on whether stone/gravel driveways and unpaved surfaces should be counted as impervious for purposes such as retention-pond triggers and whether solar farms were being treated differently under the draft rules. Members cited specific local examples — including a nonprofit farm that sought to add greenhouses but was told a retention pond would be required because inspectors had treated compacted stone as impervious.
Why it matters: designation of surfaces as impervious determines when…
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