The most topic of discussion was the extensive tree removal required for the transmission line replacement project. Shona Pistus from BSC Group, representing the absent applicant Andrew Cole, outlined the necessity of the project due to the aging structures holding up the power lines and the encroachment of trees on the right-of-way. Approximately 550 trees over six inches in diameter at breast height (dbh) are slated for selective removal to maintain line reliability. Pistus explained that construction mats would be used to facilitate access without permanent grading or fill, given the wetland nature of the area. These mats, typically made of timber, would be in place for one growing season before removal, with restoration efforts mandated to achieve 75% of pre-construction vegetation.

Questions were raised about the restoration process, particularly regarding soil management and the potential need for topsoil or clean fill. Pistus clarified that no topsoil or clean fill would be used, as there would be no excavation outside the footprint of the new structures. The focus would be on minimizing disturbance and adhering to permit conditions to ensure environmental compliance.

The discussion also delved into the management of fill material in wetland areas. It was clarified that fill from around foundations could not be returned directly to the holes due to the existing structures, necessitating its spread in upland areas outside buffer zones. The restoration plan included spreading seed in suitable soil areas and using an upland seed mix where no seed bank was present to prevent bare soil, which would violate permit conditions.

Invasive species management was another critical concern. The commission acknowledged the dominance of invasive species like fragmites and buckthorn in the region, particularly near North Reading. The focus was on preventing new invasives from entering the area, with measures such as ensuring machinery and mats were clean before entering the wetlands. Environmental monitors would conduct inspections to identify and manage new populations of invasive plants, with immediate removal if feasible.

Natural restoration strategies included spreading seeds at the beginning of the next growing season and monitoring throughout the year. If natural restoration failed, alternative planting solutions would be discussed with permitting agencies.

The potential impact on the area’s hydrology and habitat was another point of concern. While some changes in vegetation layers were expected, the overall hydrology of the large wetland was anticipated to remain stable.

A significant portion of the meeting focused on the legal implications of the project under the Wetland Protection Act, emphasizing the definition of “alter,” which includes changes such as vegetation destruction and sedimentation patterns. The commission insisted on appropriate measures to address the loss of trees, including potential compensation for their ecological roles. A proposal was made for National Grid to contribute to a conservation fund for tree planting around the town, similar to a previous project in 2021.

Financial aspects of the proposed compensation were also discussed, with acknowledgment that fees had already been paid according to the Wetlands Protection Act. However, it was noted that a portion of these fees would go into the general fund rather than specific conservation efforts. The commission expressed a desire for a separate donation directed to tree planting, requiring a formal vote.

The commission also addressed the management of the right-of-way and the use of herbicides. The area is classified as a flooded wetland and falls within a natural heritage species area, leading to restrictions on herbicide use. While herbicide use is not absolutely restricted, it would be heavily regulated in this specific area, particularly concerning its classification as an amphibian zone.

Monitoring reports related to the project were another focal point, with a preference for monthly compilations of monitoring reports. Discussions included the specifics of tree relocation and survivability, with a proposal for consistent survival percentages for trees and shrubs in future mitigation projects.

Other discussions included the management of a recently planted ground cover on Weir, updates from the DPW regarding the Pollinator Garden, and the relocation of a stream bed with the planting of willows. Administrative reports and the approval of minutes from previous meetings were also addressed, with a motion to adjourn concluding the session.