- a sub-aqueous cap over thick deposits of weak organic sediments
- a wetlands isolation cap
- on-site storm water treatment features
- a concrete weir to control flow between the Canal and Lake Champlain, and
- wetlands restoration.
A site was selected that had the highest habitat restoration potential and was relatively close to the contaminated site. To improve the wildlife habitat at the previously man-made pond on the 26-acre site, abrupt and steep shorelines were re-shaped and planted to provide better habitat for waterfowl and other wildlife. Our design created a gradual slope to the water’s edge and shallower water going into the pond to provide better habitat characteristics. Excavated soil was segregated into topsoil and underlying sand so that the natural soil profile could be recreated. The new shoreline was planted to create a riparian buffer and emergent wetland.
The Johnson Company continues to maintain and monitor the site and the compensatory restoration.
Creation of the coordinating council defused a confrontational situation and focused community efforts that resulted in a less intrusive and lower cost long-term solution. Capping the sub-aqueous contaminants and other remedy features have allowed the redevelopment of adjacent lands while protecting the environment, at a cost of about 20% of the originally proposed remedy.
