Sites proposed in Windham provide wetland creation in close proximity to Canobie Lake and Cobbetts Pond, locations which have little remaining buffer areas to development. Other mitigation sites (Southeast Lands) provide preservation over a large number of properties. For the Selected Alternative, the total amount of wetland impacts (including the Exit 3 Park-and-Ride and sound walls) in Windham is approximately 18 acres. Total mitigation provided by the sites in Windham would amount to nearly 318 acres (creation, preservation, and flood storage replacement). Each of the sites are described below.