03/05/2026 CONSERVATION COMMISSION Minutes (2)

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Town of Mashpee Conservation Commission 16 Great Neck Road North Mashpee, MA 02649 NOI 15 Nehoiden Road, Matthew H. & Carmen F. Brogie. Proposed addition to single family home. (Representative: Strong Tree Engineering) (cont. 1.22 /2.05/2.19) 43- 3394 Chair Cook recused himself from the discussion since this is one of his client. Sandi Godfrey, Secretary of the Conservation Commission, stated that with the Chair recusing himself, and the Vice Chair's absence, the Commission would need to elect a Chair Pro Tem to preside over the discussion. NOMINATION: For Paul Colombo to be Chair Pro Tem for the discussion of 15 Nehoiden Road. Nominated by: Seana Pitt Seconded by: Richard Sahl Vote: Nomination passed unanimously. (Richard Sahl, Paul Colombo, Seana Pitt, Sandi Godfrey) Chair Pro Tem Colombo confirmed that a quorum of eligible voting members was present and he opened the continued hearing for 15 Nehoiden Road. The applicant's representative explained that the project is located within the floodplain, and the design includes flood vents in the proposed garage structure. In response to comments from prior hearings, the applicant submitted revised plans including mitigation plantings. The representative noted that landscaping areas had been added along the side and rear of the lot, with native plant species such as cedars and shrubs that provide wildlife habitat and pollinator benefits. The proposed mitigation exceeds a 2:1 ratio relative to the disturbed area created by the addition. During Commission discussion, a member raised concerns about future flood conditions based on projections from the Morris Data Viewer, which incorporates sea level rise modeling developed by Woods Hole Oceanographic Institution. It was noted that projections for this parcel show a significant flood exceedance probability by 2050, potentially resulting in substantial water depths during storm events. Given these projections, the Commission encouraged the applicant to consider additional resiliency measures beyond the proposed flood vents. A Commissioner suggested the possibility of installing drainage or infiltration openings in the garage slab to allow floodwater to dissipate if the structure were inundated. The applicant indicated they had not previously encountered this type of design feature, noting that engineers typically avoid directing stormwater toward building foundations. However, the applicant stated they would be willing to explore the concept if recommended by the Commission, and a Commissioner noted such measures could potentially be included as a condition of approval. Additional discussion focused on how the garage slab is typically pitched toward the garage door, which would naturally direct water outward. Commissioners discussed alternative options, including creating drainage openings near the slab edges or leaving certain areas beneath the structure as gravel rather than concrete to improve water infiltration and reduce flood pressure. Commission members also noted that building elevation requirements and flood resiliency considerations may ultimately be reviewed further by the Building Department, given the floodplain location of the property. Several Commissioners expressed appreciation for the expanded mitigation planting plan, and no further concerns were raised. Staff indicated that the applicant had addressed the requested mitigation and that, if the applicant was willing to work with the Commission on the resiliency considerations discussed, the project appeared to be moving in a positive direction. 5