11/13/2025 CONSERVATION COMMISSION Minutes (2)

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Town of Mashpee Conservation Commission 16 Great Neck Road North Mashpee, MA 02649 Flood Elevation, Resiliency, and Waiver Request Mr. Dibb reviewed 2070 flood exceedance maps. Based on the back corner of the house, he projected a future flood elevation of approximately 16. The proposed home's first floor elevation will be 17, with all utilities also set at 17. Compared to the existing structure: • The current house's first floor is at elevation 14, with a basement vulnerable to flooding. • The rebuilt structure represents a significant resiliency improvement. Because the project increases development within the 0-75 ft buffer, a waiver was submitted, and Mr. Dibb stated he was prepared to walk through it if the Commission wished. Discussion: Distance to Shoestring Bay Mr. Colombo asked for the distance between the bay shoreline and the proposed southeast corner near the ramped driveway. Mr. Dibb estimated: —40 ft to the salt marsh edge • —20 ft from the salt marsh to the buffer line • —75 ft from the buffer line to the foundation Total—130 ft from shoreline to foundation. Vertical Walls in V-Zone/Foundation Compliance Mr. Colombo cited REG-25, Performance Standard 6, which prohibits vertical walls within the coastal A zone and particularly within 150 feet of a coastal water body and because this site is partly within a velocity zone, requirements are even stricter. He expressed concern that a modular home placed on a standard vertical foundation wall may violate this regulation. Mr. Dibb acknowledged the issue and asked for clarification on the proper interpretation so the foundation design could be revised. Driveway and Landscaping Questions Ms. Godfrey questioned the necessity of the second driveway, suggesting additional mitigation landscaping could be placed there instead. Mr. Dibb responded that the second drive provides direct access to a lower-level door, matching the existing configuration, and that regrading will reduce pooling and improve resiliency. Architectural Plan Mismatch Chair Cook raised several discrepancies: • No overhead garage door is shown on the architectural drawings. • No flood vents are shown. • The foundation details on the architectural plans do not match the site plan. He stated these elements must align for the Commission to properly review the proposal. He also noted that no septic tank is shown on the plan. Leach Pit Confirmation Mr. Dibb stated that all available information indicates the system is a single leach pit with no septic tank or distribution box. 5