the area calculated to be inundated by runoff from the 100‑year storm or;
the area of hydric soils.
Presumption Where a proposed activity involves removing, filling, dredging, building on, or altering an Isolated Wetland, or within 100 feet of the boundaries of the Isolated Wetland, the Commission shall presume that such an area is significant to the interests specified in Section I(B)(1). This presumption is rebuttable and may be overcome by clear and convincing evidence that said land does not play a role in said interests. In the event that the presumption is deemed to have been overcome, the Commission shall make a written determination to this effect, setting forth its grounds.
No activity, other than the maintenance of an already existing structures, which will result in the building within or upon, removing, filling, dredging or altering of an Isolated Wetland or of land within 100 feet of an Isolated Wetland (See Section VII) shall be permitted by the Conservation Commission, except for activity which is allowed under a a Permit or variance from these regulations granted pursuant to Section I(D).
A proposed project which may result in alteration of an Isolated Wetland shall not result in the following:
Flood damage due to filling which causes lateral displacement of water that would otherwise be confined within said area.
An adverse effect on public and private water supply or ground water supply.
An adverse effect on the capacity of said area to prevent pollution of the ground water.
An impairment of its capacity to provide wildlife habitat.
No project may be permitted which will have any adverse effect on specified habitat sites of rare vertebrate or invertebrate species as identified on the Massachusetts Massachusetts Natural Heritage and Endangered Species Estimated Habitat Maps on file with the Commission.
An adverse effect on erosion or sedimentation control.
The Preamble shall be the same as in the Act for Land Under Water Bodies and Waterways with the following addition: