Board requires decommissioning guarantees, Tier‑4 generators and closed‑loop cooling in draft data‑center rules
Sep 15, 2026
The draft UDO amendment would require a decommissioning plan and financial assurance (minimum $75,000 floor or 1.25× the engineer estimate), Tier‑4 emission standards for generators (or equivalently stringent standards), and a preference for closed‑loop cooling to limit water use.
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Planning staff’s draft ordinance would require an applicant for a data processing facility to submit a decommissioning plan and a financial assurance instrument held by the county to guarantee site restoration. The draft sets a minimum guarantee of $75,000 or 1.25 times an engineer’s estimated decommissioning cost, whichever is greater; board members questioned whether the $75,000 floor was sufficient for large facilities.
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