The primary topic of discussion was the notice of intent submitted by representatives from Crawford Land Management, who presented a plans to tackle the invasive hydrilla in Elisha’s Pond. This 10.3-acre freshwater body, surrounded by residential areas and a local camp, is facing ecological threats due to the rapid proliferation of hydrilla. This invasive species not only endangers the native aquatic ecosystem but also poses safety concerns for recreational activities.

The treatment strategy proposed involves the application of fluoridone, a systemic herbicide approved for aquatic environments and used for nearly four decades. The plan outlines three treatments over the summer, starting with an application at 20 parts per billion, the minimal concentration for effective results. The representatives assured the commission that fluoridone is safe for swimming and fishing, as it does not accumulate in animal tissue.

During the meeting, concerns were raised about the lack of specific data on the effectiveness and safety of fluoridone, particularly in the Cape Cod area. Although the representatives cited success in other ponds since the early 2000s, they acknowledged that complete eradication of hydrilla is improbable. Instead, the goal is to manage the species to ensure the pond remains functional. There was further discussion on the potential adverse effects of fluoridone on native aquatic vegetation. While no specific adverse effect data was available, the representatives maintained that fluoridone’s impact is less harmful than that of hydrilla.

The commission also debated the manual removal of dead vegetation post-treatment. Questions arose regarding why this step is necessary and whether live plants would be affected. The representatives clarified that manual removal would target floating debris after hydrilla treatment to improve oxygen levels in the pond.

Monitoring strategies post-treatment were another point of contention. The commission emphasized the need for comprehensive pre- and post-treatment metrics, including tuber measurement and native vegetation density. The importance of clear communication with local residents about treatment schedules and irrigation restrictions was also stressed.

A significant aspect of the discussion was the disposal plan for dead vegetation, which involves bagging the material and sending it to a transfer station. The representatives promised to provide updated diagrams and additional information as requested by the commission.

Another proposal focused on the use of grass carp as a biological control method for managing hydrilla in the pond. This suggestion prompted further inquiries into ownership and funding, with clarification that Elisha’s Pond is owned by a local camp, which, along with other stakeholders, is financing the project. The commission decided to continue the hydrilla discussion until May 15 to allow for a review of additional information, pending comments from Natural Heritage.

In other discussions, the commission reviewed protocols for SE83-2431 concerning the Great Island Highland Homeowners Association. This involved examining criteria for replacing geoexile bags used to protect roads from storm damage. The protocol was accepted without objections.

Further deliberations involved a notice of intent related to the Great Island Homeowners Association’s proposal for a fiber roll array and nourishment along coastal dune barrier beaches. The commission discussed erosion thresholds and the notification plan for installations, leading to an understanding of resource area impacts and the need for compliance with seasonal work restrictions.

The meeting also addressed roadway maintenance near sensitive beach areas, emphasizing the need to prevent erosion with a five-foot buffer. The conversation highlighted the necessity of maintaining access for residents and emergency services, with creative suggestions like using “doom buggies” for emergency transport.

Residential development projects were also on the agenda, including a proposed garage driveway near a vegetated wetland buffer zone. Modifications were made to preserve trees and introduce new plantings, leading to project approval pending submission of a revised plan.

A coastal bank delineation project was discussed, focusing on mitigation measures and the introduction of native plantings to enhance ecological value. The project included small additions to a residence and was approved with conditions regarding tree management and invasive vine removal.