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Plymouth planning board moves to add hammerhead turnaround standards to subdivision rules
Summary
After a resident engineer presented standardized 'hammerhead' designs, the board agreed to draft amendments to the town's subdivision regulations to add turnaround templates and clearer technical requirements to improve emergency access and snow removal.
The Plymouth Planning Board agreed Jan. 22 to begin drafting changes to the town's subdivision regulations that would add minimum "hammerhead" turnaround specifications and other clarifying templates for dead-end streets.
At the meeting, resident Steve — who supplied engineered templates — told the board he had reviewed local developments and found inconsistent turnaround construction, saying, "This is what he came up with" when describing the hammerhead detail he recommended. Steve said the lack of regulated hammerhead dimensions has complicated access and snow clearing, and urged the board to adopt a simple minimum standard.
Board members discussed preserving flexibility while giving applicants clearer guidance. Joseph, speaking for staff, proposed including a short set of pre-approved templates (cul-de-sac, hammerhead or comparable designs) that would still allow alternatives through departmental review. "You can choose one of these that we've already outlined for you," Joseph said, describing how templates could speed review while allowing exceptions when departments sign off.
Members cited a recent local example, Page Street, where initial site plans called for a cul-de-sac but on-the-ground construction and later redesign produced a different turnout. Joseph noted the town recently received a draft easement from an applicant to create a turnaround there and that matter is "in progress." Board members said the specification change would also help the highway and fire departments and reduce recurring waivers.
There was broad support to move the topic into the board's next work session and prepare a regulatory amendment and appendices that list minimum dimensions; the board noted any change to subdivision regulations will require public notice and a hearing. Neil MacGyver said the board can begin work sooner rather than waiting until next year: "We don't need to wait another year," he said.
Next steps: staff will add the hammerhead templates and related clarifications to a future work-session agenda for drafting and public-notice planning; any formal regulatory change will be subject to public hearings and the board's standard adoption process.
