08/21/2025 CONSERVATION COMMISSION Minutes

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Town of Mashpee Conservation Commission 16 Great Neck Road North Mashpee, MA 02649 Vote: Motion fail. Aye: Steven Cook, Richard Sahl Nay: Sarah Thornbrugh Paul Colombo Sandi Godfrey Reason: Cumulative effect and lack of compelling reason. Mr. Gonsalves requested a continuance. MOTION: To continue 157 Daniels Island Road to September 18,2025. Motion by: Sarah Thornbrugh Seconded by: Richard Sahl Vote: Motion passes unanimously. (Steven Cook, Sarah Thornbrugh, Paul Colombo, Sandi Godfrey Richard Sahl) NOI 19 Uncle Henry's Road, Monica Miller. Proposed addition to existing garage,remove and rebuild deck, installation of innovative alternative (I/A) septic system, and 43- mitigation plantings. 3351 (Representative: Cape & Islands Engineering, Inc.) (coat. 08.07) (legacy Reg 25) Mr. Dibb explained that the property lies entirely within an AE flood zone (elevation 12) and that the only resource area on site is the flood zone itself. The proposed improvements would modernize the structure while ensuring compliance with flood regulations. The septic upgrade, which replaces an outdated leach pit with a nitrogen-reducing IA system and a new leach field maintaining a five-foot separation to groundwater, would significantly improve water quality without increasing flow under Title 5. He clarified that while the waiver request narrative referenced a full rebuild to meet flood code, the existing home would not be razed but retrofitted with flood vents to make it compliant. The proposed garage and addition total approximately 730 square feeta roughly 40% increase over the 1,800-square-foot home. This approach, he said, was more financially feasible for the homeowner than a complete teardown and rebuild, which could have nearly doubled the house's footprint. Mr. Dibb also noted that nitrogen loading would drop from approximately 13.3 to 9.5 kg/year, representing a measurable environmental improvement. Ms. Thombrugh thanked him for the detailed explanation and asked whether the septic upgrade was required due to other work or if it was voluntary. Mr. Dibb replied that it was triggered automatically by the building permit, given the home's proximity to wetlands. Ms. Thombrugh then raised concerns about the increase in impervious surfaces—approximately 765 square feet—and the planned removal of mature vegetation. She questioned whether the design could be modified to preserve more of the existing landscape,possibly by relocating the garage, reducing paved areas, or considering a gravel-based carport instead of a concrete slab. Mr. Dibb responded that the existing garage would be converted into living space, making relocation difficult, but agreed to discuss potential layout adjustments with the homeowner to reduce driveway size or 12