11/13/2025 CONSERVATION COMMISSION Minutes (2)

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I Town of Mashpee Conservation Commission 16 Great Neck Road North Mashpee, MA 02649 Motion by: Richard Sahl Seconded by: Sandi Godfrey Discussion: Rear additions must be filed under a NOI once the septic tank is located. Vote: Motion passed by unanimous vote. (Steven Cook, Paul Colombo, Sandi Godfrey, Richard Sahl) NOI 367 Mashpee Neck Road, Gary & Linda Oldham. Proposed Raze & Rebuild single-family dwelling with town sewer connection. (Representative: Cape & Islands Engineering.) (cont. 10.23) 43- 3372 Mr. Dibb provided an overview of the site's resource areas and topography: • The property lies between Shoestring Bay(to the east) and Mashpee Neck Road. • A salt marsh exists between the shoreline and the bay. • A drainage swale lies between the salt marsh and the roadway. • A coastal bank is present, defined through slope and flood characteristics. • Two flood zone boundaries cross the lot: o The limit of the coastal A zone (V-zone to AE transition). o The AE-I Ito Zone X boundary, which runs just east of the existing home. The project proposes to demolish the existing house and rebuild on a new, flood-compliant foundation. A new modular home is planned, along with a separate garage positioned to the left of the dwelling. Proposed Development and Buffer Zone Impacts The new foundation measures 42 ft x 27.5 ft, with a new detached garage also planned. Two overlapping 75-ft buffer zones apply: • 75-ft buffer to the salt marsh • 75-ft buffer to the coastal bank Mr. Dibb described how the mitigation table was developed: • The coastal bank buffer area serves as the primary regulatory buffer. • The site plan breaks development into 5-ft and 10-ft bands to calculate existing vs. proposed disturbance. • The proposal increases development within the 75-ft buffer by 151 sq. ft, requiring mitigation. • The plans provide nearly 500 sq. ft of mitigation—more than triple what is required. Regarding landscaping: • Detailed plant labels are not shown, but areas are clearly categorized as grassed, landscaped, or natural. • Dark green shading identifies mitigation zones. • Five replacement trees are proposed. • Nitrogen loading calculations were submitted. Sewer Connection and Nitrogen Loading Mr. Dibb explained that the Board of Health had indicated the existing leach pit may continue to be used until sewer becomes available. Nitrogen calculations were prepared assuming sewer connection, resulting in near- zero projected nitrogen loading. 4