Acushnet Conservation Commission Tackles Pond Biomass Accumulation with Eco Harvester Solution

The Acushnet Conservation Commission meeting focused on addressing the significant biomass accumulation in local ponds, especially a small pond across from Tom Davis. The commission explored the implementation of an Eco Harvester machine to manage the issue, while also discussing environmental safeguards, project logistics, and ownership complexities.

0:01The meeting commenced with the election of Jim Souza as the new chairman and Christian De Sousa as vice-chairman, following organizational procedures. The primary agenda then turned to the ecological concerns surrounding the ponds, particularly the buildup of biomass that has been exacerbated by seasonal ice cover. Recent drone surveys highlighted the extent of the biomass accumulation, revealing areas where the depth of organic material reaches up to four feet. This situation poses a threat to the pond’s ecological viability, as decomposing weeds contribute to shallower water depths.

In response to this issue, the commission considered employing an Eco Harvester machine for weed removal. Jeff Corco, representing C and D Underwater, provided detailed insights into the machine’s capabilities, which can remove 50 to 80 cubic yards of material daily. The machine’s transportation via a pontoon boat trailer was also discussed to minimize environmental impact. However, concerns were raised about accessing the ponds, especially the smaller pond, and the potential for logistical challenges. The possibility of using a johnboat for more maneuverable access was considered.

Corco detailed the process of dewatering and removing the harvested weeds to a reserve area, at least 50 feet from the water’s edge, to prevent recontamination from rain runoff. This plan aims to manage the removed biomass effectively and maintain water quality. Participants emphasized the importance of careful management to ensure the project’s success without further ecological disruption.

15:40Further discussion addressed the management of non-native aquatic vegetation and the project’s timeline. Concerns were voiced about the logistics of material removal, with suggestions to keep materials nearby to avoid delays. The conversation included environmental safeguards, such as using straw waddles or hay bales to prevent runoff into nearby water bodies. The role of geese in introducing unwanted materials to the water was also noted.

Participants discussed the importance of collaboration and communication among stakeholders to ensure a successful outcome. There was consensus on involving multiple stakeholders during the initial site work to monitor progress and make real-time decisions. Recommendations from an absent participant, Chance Parks, suggested that mechanical weed removal should be complemented by a water sampling program to monitor thermal and chemical conditions. Parks also emphasized community engagement to educate residents about watershed management.

30:06The commission also navigated the complexities of pond ownership, which had transitioned from private ownership to the city of New Bedford. Questions about drafting a complicated notice of intent were raised, with a conservation agent expressing the need for clarity before proceeding. Discussions with the Massachusetts Department of Environmental Protection (Mass DEP) and the aquatic vegetation management policy were also mentioned, highlighting concerns about water quality and access to the pond.

The presence of beaver habitats in the area added another layer of complexity, prompting discussions about potential monitoring to determine their status. The ecological implications of beaver habitats and the timing of project work were considered, with a recommended restriction from April 1st to June 15th to protect River Herring and other species.

Note: This meeting summary was generated by AI, which can occasionally misspell names, misattribute actions, and state inaccuracies. This summary is intended to be a starting point and you should review the meeting record linked above before acting on anything you read. If we got something wrong, let us know. We’re working every day to improve our process in pursuit of universal local government transparency.

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