Hamden adds zoning rules for battery energy storage systems; bylaw clears two-thirds vote
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Summary
Town meeting adopted a new zoning bylaw regulating battery energy storage systems to add local standards for siting, decommissioning, water protection and monitoring. The planning board and advisory committee recommended the measure and it was read into the record before a successful two-thirds vote.
Town meeting adopted a bylaw to regulate battery energy storage systems (BESS) within Hamden, adding local permitting standards intended to protect drinking water, habitats and scenic resources and to require financial assurance for decommissioning.
The planning board recommended favorable action after a public hearing and presented a three-page report describing public-safety and environmental concerns associated with large lithium-ion installations. That report, read into the record, cited studies showing that thermal-runaway fires in large battery arrays produce complex runoff and airborne contaminants and that firefighting water can carry metals and other compounds into soils and groundwater.
The new bylaw classifies BESS into tiers and sets standards on siting, monitoring, sound, visual buffers, stormwater and decommissioning plans. Several residents and the planning board emphasized Hamden’s reliance on private wells, significant forested and conservation land, and wildlife habitat, asking the town to build reasonable local protections into the zoning. Planning-board members and several residents said the bylaw is intended to provide local safeguards while remaining consistent with state law.
Proponents argued that adopting the bylaw gives the town regulatory tools to require site-specific mitigation, monitoring and financial assurance; opponents expressed concerns about the state-level permitting framework but planners and town counsel explained that without a local bylaw, state rules would govern and the town would have fewer options to address local conditions.
The article passed by the required two-thirds vote. Planning board members noted the bylaw and the planning-board report will be submitted to the attorney general as part of the standard local zoning-adoption process.
Background: the planning-board report referenced recent technical literature on battery-fire runoff and emphasized protecting aquifers and habitat in a town with many private wells and significant forested acreage.