Concerns were also raised about untreated knotweed on neighboring properties potentially encroaching back onto the site, highlighting the challenges of managing such a stubborn species in a disturbed soil environment. The commission emphasized that successful mitigation should provide lasting ecological benefits rather than temporary solutions, seeking evidence to support claims of the native plants’ ability to outcompete knotweed.

In parallel, the commission evaluated the project’s stormwater management proposals, which include the installation of a First Defense unit designed to treat stormwater runoff. The unit aims to achieve at least 50% removal of total suspended solids, with a capacity to handle varying flow rates. Although a local expert familiar with similar units expressed confidence in the proposal, questions arose regarding the inclusion of asphalt-covered areas in the mitigation calculations, with some members questioning the appropriateness of counting such surfaces in the overall area designated for mitigation.

The project also entails significant landscaping changes, including the addition of native shrubs and a revised maintenance plan to prevent overgrowth. However, skepticism persisted about the proposed mitigation’s ability to withstand human impact, particularly in areas subject to significant foot traffic. The commission deliberated on whether to draft an order of conditions, opting to continue discussions at a future meeting to allow for more comprehensive planning and stakeholder engagement.

Another focal point of the meeting was the Piri Pond Connector Boardwalk project, led by Claire Relli of the Town of Natick. This initiative seeks to enhance trail connectivity within the Pickle Pond conservation area by constructing a floating boardwalk. However, the lack of a Department of Environmental Protection (DEP) file number necessitated a continuation to the next meeting. The project involves various construction elements, including box stair construction and restoration of disturbed areas. The commission reviewed site photos and discussed the impact of the proposed construction on native vegetation, acknowledging that some minor clearing and tree removal would be required.

The boardwalk’s design features interlocking composite sections with aluminum handrails, anchored by pyramid bottom anchors to minimize environmental disturbance. Despite the boardwalk’s potential connectivity benefits, the commission noted the absence of neighbor notifications, emphasizing the importance of clear communication to the local community. Attendees discussed the project’s compliance with updated FEMA flood zone classifications, noting recent changes from a 500-year to a 100-year flood zone.

In other discussions, the commission addressed a demolition project linked to historical contamination from a former dry cleaner. Concerns centered on the monitoring of a contamination plume affecting residential structures, with members noting discrepancies between current plans and the Route 9 project, potentially leading to changes in access configurations.

Additionally, the commission engaged in a dialogue with the Charles River Watershed Association (CRWA) regarding proposed changes from the Environmental Protection Agency (EPA) on combined sewer overflows (CSOs). Members expressed concern that easing restrictions on sewage discharges could undermine decades of progress in water quality, agreeing to sign a letter opposing these changes as a supportive gesture, given Natick’s lack of CSOs.