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Commission backs baseline-plus approach for inverter noise, seeks enforceable screening standards
Summary
The commission favored inverter-noise limits tied to preconstruction background (3 dBA above baseline, up to the county cap) and discussed vegetative-screening performance, a 10-foot mature height target within four growing seasons, and mechanisms (maintenance bonds/penalties) to ensure screening is maintained.
A public commenter urged a more restrictive inverter-noise standard and proposed tying limits to preconstruction background noise plus a small allowable increase. Commissioners generally favored the baseline-plus approach: measure preconstruction background, allow up to 3 dBA above that baseline, and maintain the existing county cap (50 dBA) as an upper bound.
The Commission also focused on vegetative screening to minimize visual and noise impacts. Commissioners recommended setting a performance target (10 feet at full growth within four growing seasons) and asked staff to research options for maintenance bonds, penalties, or contractual obligations so developers will replace dead plantings. The Commission said vegetative screening must be effective and enforceable, not token plantings that fail to provide the intended benefit.
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