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Planning board raises power, water and environmental concerns as it begins drafting data center guidance
Summary
Board members flagged grid capacity, cooling water/wastewater treatment, environmental impacts on streams, noise and fire-safety issues while brainstorming an ordinance or moratorium on data centers; staff and KV‑COG will help draft model language for the council.
The Winthrop Planning Board held a preliminary brainstorming session on data centers after the town council asked the board to develop ordinance language and consider a moratorium. Members did not vote on a moratorium at this meeting but identified core areas the ordinance should address and asked staff to consult model language.
Greg (planning staff/engineer) outlined the board’s primary technical concerns: grid and interconnection capacity (how a large commercial electrical user could consume local distribution capacity), cooling systems and wastewater discharge (thermal impacts that can reduce dissolved oxygen and alter aquatic habitat), and the environmental permitting questions that state regulators would need to review. He urged the board to require applications to show whether cooling is closed-loop, where cooling water is sourced, and how wastewater would be treated and discharged.
Board members also raised complementary issues: low-frequency noise from cooling and mechanical equipment, fire-protection planning for high-density electrical systems, potential state-level taxation or other fiscal impacts, and the desirability of including remediation/ decommissioning assurances in any approval. Several members suggested inviting technical experts or using KV‑COG’s draft model ordinance as a starting point.
Don Matise and other members emphasized the need to address power capacity and future development impacts explicitly; members recalled lessons from prior solar- and industrial-permitting discussions where lack of rules allowed applicants to proceed before the town had standards. The board agreed to gather a more detailed checklist of information (power demand, heat rejection method, wastewater treatment, noise mitigation, fire-safety measures and tax/long-term remediation considerations) that applicants should provide to allow an informed review and to share that brainstorm with the council.
Staff said KV‑COG (Turner) is preparing model language and that the council will consider a moratorium/extension at its July 6 meeting; the board will use council feedback to refine a proposed ordinance. No formal vote on a moratorium was taken at this meeting.
