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Trying to save a house from erosion

The project has raised concerns about traffic on the quiet island and the environmental impact on Wasque Point.

GRETCHEN ERTL FOR THE BOSTON GLOBE

The project has raised concerns about traffic on the quiet island and the environmental impact on Wasque Point.

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The ocean has scoured land at a cliffside mansion on Chappaquiddick, but the homeowners’ efforts to save it may not be enough against the environmental process.

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