06/11/2026 CONSERVATION COMMISSION Minutes

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Town of Mashpee Conservation Commission 16 Great Neck Road North Mashpee, MA 02649 NOI 63 Monahansett Road, Steven H. & Andrea B. Dubbs. Proposed Project for an addition to an existing single-family home along with a patio area, utility shed, mitigation plantings, and associated with site work. (Representative: Merrill Engineers and Land Surveyors) (cont. 5.07) 43- 3418 Tim Santos of Merrill Engineers appeared on behalf of the applicant. Mr. Santos stated that revised plans and a response letter had been submitted addressing comments raised at the prior hearing. Mr. Santos explained that transects had been added to the existing conditions plan in accordance with the coastal bank guidelines to support the delineation of the top of coastal bank. He stated that the proposed shed had been eliminated and the patio area had been reconfigured. As a result, the mitigation calculations were revised. A retaining wall section was also added, showing a small gravity block wall no taller than approximately three feet. Mr. Santos reported that groundwater information had been obtained from the adjacent lot for purposes of evaluating the proposed dry well. HydroCAD calculations were submitted evaluating the performance of the proposed drainage system under increasingly severe storm conditions, including the 2-, 25-, 50-, and 100-year storm events. Mr. Santos reported that the dry well was designed to accommodate the 2-, 25-, and 50-year storm events, with overflow occurring at approximately elevation 11.1 during larger storm events. Mr. Santos stated that the landscape plan had been revised to match the site plan and that the "not for construction" note had been removed as requested. Nitrogen calculations for existing and proposed conditions were also submitted for the file. A construction methodology prepared by Clancy Construction was provided explaining how the existing deck would be demolished and how the proposed addition and work along the bank would be constructed. Mr. Santos also addressed prior discussion regarding Regulation 3A(4). He stated that the applicant was not seeking an exemption because an application had been filed with the Zoning Board of Appeals for a special permit. He explained that the house is located on the coastal bank, resulting in a zero setback to the wetland resource area, and that zoning relief would be required following Commission review. Questions were raised regarding the proposed stockade fence and whether it would allow for wildlife passage. Mr. Santos stated that the fence was intended for privacy and not to contain animals and indicated that a condition addressing wildlife passage would be acceptable. The Commission acknowledged the revisions made in response to prior comments, including removal of the proposed shed, submission of additional plans and calculations, and provision of a construction methodology. Questions were raised regarding the revised patio design and the proposed covered outdoor kitchen area. Mr. Santos explained that the patio remained the same size as previously proposed and would consist of permeable pavers. He stated that the outdoor kitchen area would be located on the patio and would include a post- supported cover or pergola structure. Discussion followed regarding whether the outdoor kitchen and covered area constituted a new structure within 75 feet of the coastal bank. It was noted that the proposed addition over the footprint of the existing deck represented redevelopment of an area already occupied by a structure. However, concern was expressed that the outdoor kitchen, pergola, and associated permanent improvements may constitute new structures within the coastal bank buffer area. Reference was made to the Commission's coastal bank performance standards, and 10