Planning Board — May 27, 2026
The meeting was characterized by strong public interest and a high volume of community comments regarding a major excavation proposal.
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At the May 27 Planning Board meeting, the town faced intense scrutiny over the proposed Onyx Corporation excavation project. This 8-phase plan involves 67 acres on Brookline Road and could span up to 15 years, significantly impacting local residents, businesses, and our environment.
During the public hearing, residents raised specific, high-stakes concerns: the impact of heavy truck traffic on our local roads and bridges, the effectiveness of dust mitigation for nearby businesses, and the environmental risks of using calcium chloride near wetlands. Most notably, members of the community pointed out that the proposal may not even have an 'accepted use' under Mason’s existing excavation regulations—a legal point the board has not yet formally addressed.
The board ultimately voted 4-1 to continue the hearing to June 24, 2026, to allow the applicant to submit a traffic study and more detailed engineering documentation. This split vote indicates that even the board is not in total agreement on how to proceed with this massive project.
This is a major issue for anyone living near Brookline Road or concerned about our town's infrastructure and environmental protections. Mark your calendars for June 24.
Public impact
Large-scale 67-acre excavation spanning up to 15 years.
The hearing was continued to June 24, 2026, to allow the applicant to provide a traffic study and more detailed engineering documentation.
Hearing continued to June 24, 2026; applicant to provide written communication to Cassie Cashin.
Topics discussed
The board reviewed findings from recent site walks regarding sight distances, fueling, and wetland/pond locations.
The board reviewed the summaries provided by members and the Conservation Commission.
A public hearing regarding a proposed 8-phase excavation site plan on 67.01 acres on Brookline Road.
The hearing was continued to the next meeting at the request of the applicant to allow for a traffic study and written documentation.
Hearing continued to June 24, 2026; applicant to provide written communication to Cassie Cashin.
Proposed amendments to require cisterns or other fire protection methods when a driveway is more than 1,000 feet from a water source.
The amendment was approved unanimously.
An informal discussion regarding a potential 4-lot residential subdivision.
The board expressed that the proposal seemed unfavorable due to the odd shape of the lots and the lack of a cul-de-sac.
Controversy & dissent
Potentially controversial issues
Onyx Corporation Excavation (MAS PB 2026-01)
Split votes
Community vs. board tension
Public comment
Decisions logged
Action items
Member positions
Positions marked ~ are inferred from context and may not reflect the member's explicitly stated position. UNCLEAR means the vote was split but the record did not name how this member voted — it is not a “yes.”
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grok-4.3, gemma-4-26b, grok-4.20-0309-reasoning, grok-4-fast · analyzed 2026-07-09.
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